CN117168712B - Detection assembly, detection equipment and detection method thereof - Google Patents

Abstract

The application relates to a detection component, detection equipment and a detection method, which include: a detection cover, a detection cavity with a bottom opening, and at least one air extraction port formed on the wall of the detection cover; a detection probe, which is arranged in the detection cavity and/or in the air extraction port; at least one first air blowing pipe, provided on the detection cover; and at least one second air blowing pipe, provided on the detection cover, and connected with the blowing pipe of the first air blowing pipe. The air directions intersect; the air flow blown out by the first air blowing tube and the second air blowing tube is at least partially surrounding the peripheral side of the opening. A detection component, detection equipment and detection method according to the embodiment of the present application have the advantages of high detection accuracy and long service life.

Description

Testing components, testing equipment and testing methods

Technical field

This application relates to battery production and detection technology, and in particular to a detection component, detection equipment and detection method.

Background technique

Gas leak detection methods are widely used in battery production testing due to their advantages of low cost and high sensitivity. However, the current leak detection methods used in industrial sites still have large detection errors and poor stability of detection probes, and cannot effectively meet the needs of large-scale battery detection.

Summary of the invention

Based on this, it is necessary to provide a detection component, detection equipment and detection method to improve the problem of large detection errors of detection probes.

The first aspect of the embodiment of the present application provides a detection component, including: a detection cover, a detection cavity with a bottom opening, at least one air extraction port formed on the wall of the detection cover; a detection probe, disposed in the detection cavity and /or in the air extraction port; at least one first air blowing tube, arranged on the detection cover; and at least one second air blowing tube, arranged on the detection cover, and connected with the air blowing of the first air blowing tube The directions intersect; the air flow blown out by the first air blowing tube and the second air blowing tube is at least partially surrounding the peripheral side of the opening.

The airflows blown out by the first air blowing pipe and the second air blowing pipe together form an air curtain, and at least a part of the air curtain is arranged around the opening, so that during the air extraction test at the air extraction port in the detection cover, the gas from the external environment is reduced from entering the detection cavity through the opening, thereby improving the detection accuracy of the detection probe and improving the stability of the detection result; thereby avoiding the interference gas in the external environment from being adsorbed on the detection probe in large quantities, and thus effectively delaying the passivation rate of the detection probe, extending the service life, and reducing the maintenance cost.

In one embodiment, the detection component includes a plurality of detection probes, and all detection probes are spaced apart from each other. Through simultaneous detection with multiple detection probes, the detection accuracy can be improved and misjudgment of results can be avoided.

In one embodiment, the blowing pressure of the first blowing pipe is greater than or equal to the suction pressure of the suction port; and/or, the blowing pressure of the second blowing pipe is greater than or equal to the suction pressure of the suction port. By setting the pressure value, the airflow blown out by the first blowing pipe and the second blowing pipe can form a slightly positive pressure environment in the detection cavity, which can effectively prevent the interference gas in the external environment from entering the detection cavity from the opening, and further effectively prevent the interference gas in the external environment from being adsorbed on the detection probe in large quantities, effectively delaying the passivation rate of the detection probe, extending the service life, and reducing maintenance costs.

In one embodiment, the detection cover includes a cover top plate and a plurality of cover side plates, and the plurality of cover side plates are connected end to end and surrounded by the peripheral side of the cover top plate to form the detection cavity; The air extraction port is provided on the top plate of the cover.

In one embodiment, the first air blowing pipe blows air toward the cover top panel and/or the cover side panel.

In one of the embodiments, the first blowing pipe is provided on a side of the cover top plate facing the detection chamber. In this way, the air flow blown out by the first air blowing pipe will flow along the cover side plate on one side of the cover top plate, and then be bent in the direction of the opening under the action of the cover side plate. In this way, an air curtain can be formed around the opening.

In one embodiment, the detection component includes a first air supply pipe, the first air supply pipe is passed through the cover top plate and communicates with the first air blowing pipe. In this way, the first air supply pipe can continuously provide clean gas to the first air blowing pipe, thereby reducing a large amount of interfering gas in the external environment from being adsorbed on the detection probe.

In one embodiment, the first air blowing pipe includes a plurality of first air blowing ports, and the blowing directions of at least two first air blowing ports are opposite.

In one embodiment, the first air blowing pipe includes a first branch pipe and a second branch pipe that are connected to each other, and the intersection of the first branch pipe and the second branch pipe is connected to the first air supply pipe, and the The blowing directions of the two ends of the first branch pipe and the two ends of the second branch pipe are arranged parallel to the surface of the cover top plate. In this way, the airflow blown out by the first blowing pipe can cover more plane angles, thereby forming an air curtain around the opening, reducing interference gases in the external environment from entering the detection chamber and being adsorbed on the detection probe in large quantities.

In one embodiment, the second air blowing pipe blows air along the cover top plate in a direction toward the opening.

In one embodiment, the second air blowing tube is arranged on the side of the cover side plate facing the detection chamber; or, the second air blowing tube is arranged on the side of the cover side plate facing away from the detection chamber. side.

In one embodiment, the detection component includes a second air supply pipe, and the second air supply pipe is passed through the cover top plate or the cover side plate; the second air supply pipe and the second blowing pipe One end close to the cover top plate is connected, and the end of the second air blowing pipe away from the cover top plate blows air downward along the second direction. In this way, the second air supply pipe can continuously provide clean gas to the second air blowing pipe, thereby reducing a large amount of interfering gas in the external environment from being adsorbed on the detection probe.

A second aspect of the embodiment of the present application provides a detection device, including the above detection component.

In one embodiment, the detection equipment includes a controller, a clean air source, a first control valve, a second control valve, a detection pipeline and a negative pressure device; one end of the detection pipeline is connected to the negative pressure device, so The air extraction port is connected to the other end of the detection pipeline through the first control valve, and the clean air source is connected to the other end of the detection pipeline through the second control valve; the detection probe is arranged on the detection pipeline inside; the controller controls and connects the first control valve, the second control valve and the clean air source; the detection probe is connected to the controller signal.

The third aspect of the embodiment of the present application provides a detection method, including:

Determine the current status of the detection equipment; if the detection equipment is currently in the detection status, open the first control valve, close the second control valve, and close the clean air source; if the detection equipment is currently in the standby status, close the first control valve and open the second control valve. 2. Control valve and turn on the clean air source.

The above description is only an overview of the technical solutions of the present application. In order to have a clearer understanding of the technical means of the present application, they can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable. , the specific implementation methods of the present application are specifically listed below.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the exploded structure of a battery provided by some embodiments of the present application.

Figure 2 is a schematic structural diagram of a detection component provided by some embodiments of the present application.

FIG. 3 is a front view of a detection component provided in some embodiments of the present application.

Figure 4 is an A-A cross-sectional view of the structure shown in Figure 3 .

FIG5 is a B-B cross-sectional view of the structure shown in FIG3 .

Figure 6 is a cross-sectional schematic diagram of a detection component provided by some embodiments of the present application.

Figure 7 is a schematic diagram of the principle of detection equipment provided by some embodiments of the present application.

Figure 8 is a flow chart of a detection method provided by some embodiments of the present application.

In the figure, X indicates the first direction, and Y indicates the second direction.

Explanation of reference symbols:

Detection cover-10, detection chamber-11, air extraction port-12, cover top plate-13, cover side plate-14, bottom opening-15, detection probe-20, first blow pipe-30, first air supply pipe-31, The first branch pipe-32, the second branch pipe-33, the second blowing pipe-40, the second air supply pipe-41, the controller-91, the clean air source-92, the first control valve-93, the second control valve-94 , detection pipeline-95, negative pressure device-96.

Detailed ways

The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

In the description of the embodiments of this application, if these technical terms "first", "second", etc. appear, these terms are only used for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicit Indicate the quantity, specific sequence or priority relationship of the technical features indicated.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of this application, the term "and/or" is only an association relationship describing associated objects, indicating that there can be three relationships, such as A and/or B, which can mean: A exists alone, and A exists simultaneously and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

In the description of the embodiments of this application, if the term "plurality" appears, the meaning of "plurality" is at least two (including two), such as two, three, etc., unless otherwise explicitly and specifically limited. Similarly, if the term "multiple groups" appears, "multiple groups" refers to two or more groups (including two groups); if the term "multiple tablets" appears, "multiple tablets" refers to two or more tablets (including two groups). piece).

In the description of the embodiments of this application, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left" and "right" appear "Vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The orientation or positional relationship indicated by these terms is: The orientations or positional relationships shown in the drawings are only for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore It cannot be understood as a limitation on the embodiments of this application.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. If an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and are not meant to be exclusive. implementation.

At present, judging from the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, but are also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as in aerospace and other fields. As the application fields of power batteries continue to expand, their market demand is also constantly expanding.

In related technologies, batteries rely on internal electrochemical reactions to store or release corresponding electrical energy; harmful gases are easily generated during the electrochemical reaction, which are sealed in the internal space of the battery to prevent leakage. Therefore, the airtightness of the battery connection gap is one of the key factors affecting product performance and life. Especially in the large-scale production of batteries, it is often necessary to detect whether the battery has leakage to ensure the quality of the battery.

The current design generally uses a detection cover placed on the battery, which is externally connected to a large negative pressure device, and uses negative pressure to suck the gas on the box to sniff and detect the connection seams on the battery; while during detection Because large-scale negative pressure equipment cannot be shut down at will, the detection cover is always in a pumping state; in current industrial sites, the gas composition of the external environment is relatively complex and unstable, and the detection probe in the detection cover is exposed to the open environment for a long time. The detection probe is susceptible to interference and will absorb a large amount of interfering gases in the external environment, resulting in large detection errors and poor stability of the detection probe, accelerated passivation rate, shortened service life, and increased maintenance costs.

In order to improve the above situation, an air blowing device can be added to the design of the detection cover to reduce the interference gas in the external environment from entering the detection cover; to improve the detection accuracy of the detection probe and effectively slow down the passivation of the detection probe speed, extending service life, thereby reducing maintenance costs.

Figure 1 is an exploded view of a battery 100 provided by some embodiments of the present application; in order to meet different power requirements, the battery 100 may include multiple cells 121 and a box 110. The cells 121 constitute a battery module 120 or a battery pack. the smallest unit. Multiple battery cells 121 may be connected in series and/or in parallel via electrode terminals to be used in various applications.

The battery 100 mentioned in this application may be a battery pack with a box 110 . The box 110 is used to accommodate the battery core 121 or the battery module 120 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery core 121 .

The box 110 can adopt a variety of structures. In some embodiments, the box 110 can include a first part 111 and a second part 112, the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 121. The second part 112 can be a hollow structure with one end open, and the first part 111 can be a plate-like structure. The first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 can also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be in a variety of shapes, such as a simple three-dimensional structure such as a single cuboid or a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid or a cylinder or a sphere, and the embodiments of the present application are not limited to this. The material of the box body 110 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin, and the implementation mode of the present application is not limited to this.

In the embodiment of the present application, multiple battery cells 121 can directly form a battery pack, or they can first form a battery module 120, and then the battery module 120 can form a battery pack. Specifically, the plurality of battery cores 121 can be directly connected in series or in parallel or mixed together to form a whole, and then the whole composed of the plurality of battery cores 121 can be accommodated in the box 110 . Alternatively, multiple battery cells 121 may be connected in series, parallel, or mixed to form the battery module 120 , and then the multiple battery modules 120 may be connected in series, parallel, or mixed to form a whole, and be accommodated in the box 110 .

In addition, the battery 100 may also include other structures. For example, the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells 121 .

It should be noted that each battery cell 121 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery core 121 may be in the shape of a cylinder, a flat body, a cuboid or other shapes. The battery cells 121 are generally divided into three types according to the packaging method: cylindrical battery cells, cuboid battery cells and soft-packed battery cells, and the embodiment of the present application is not limited to this.

During the charging and discharging process of the battery, the electrochemical reaction occurs in the battery core 121, which may produce a small amount of harmful gas. This part of the gas remains inside the battery core 121, but may also enter the box 110 during long-term use, and then smoothly The connecting seam where the first part 111 and the second part 112 cover each other escapes to the external environment.

A first aspect of embodiments of the present application provides a detection component. The detection component can be provided on the battery 100 for detecting air tightness.

It should be understood that the technical solution generally described in each embodiment of the present application can be applied to all batteries including a box. In this case, the detection component can be covered on the box 110 of the battery 100 to detect the first part 111 and the second part. 112 The connecting seams that cover each other are subject to corresponding air tightness testing. The technical solutions generally described in the embodiments of this application can also be applied to batteries without boxes, that is, exposed battery cores 121. In this case, the detection component can be directly covered on the battery core 121, thereby detecting the battery. The welding seam between the upper shell and the end cover of the core 121 undergoes corresponding air tightness testing. For convenience of description, in each of the following embodiments, the detection component performs air tightness detection on the battery box 110 as an example for corresponding description.

Referring to Figures 2 and 3, Figure 2 is a schematic structural diagram of a detection component provided by some embodiments of the present application. Figure 3 is a front view of a detection component provided by some embodiments of the present application.

The detection assembly includes: a detection cover 10, a detection probe 20, at least one first air blowing tube 30, and at least one second air blowing tube 40.

Among them, the detection cover 10 is a hollow structure with one side open; the detection chamber 11 has a bottom opening 15. The projection shape of the detection chamber 11 is usually adapted to the box 110 of the battery 100, and can be in various shapes, such as It can be a simple shape such as a regular rectangle or a square, or it can also be a complex shape formed by a combination of polygons, circles, or other simple structures. The embodiments of the present application are not limited to this. The material of the detection cover 10 may be alloy materials such as aluminum alloy, iron alloy, or polymer materials such as foam plastic, and the embodiments of the present application are not limited thereto.

At least one air extraction port 12 is formed on the wall of the detection cover 10; the air extraction port 12 connects the detection chamber 11 with an external negative pressure device 96 (mentioned below). The detection probe 20 is arranged in the detection chamber 11 and/or the air extraction port 12 for detecting the components in the gas.

The detection probe 20 can be a hydrogen sensor, which is very sensitive to hydrogen gas at normal temperature and has good selectivity; hydrogen gas is used as a tracer gas to reflect the air tightness of the connection seam of the box 110 of the battery 100 .

The first blow pipe 30 is arranged on the detection cover 10 and blows out the air flow in the first direction. The second blow pipe 40 is provided on the detection cover 10 and blows out the air flow in the second direction. The blowing directions of the second air blowing pipe 40 and the first air blowing pipe 30 intersect, that is to say, the first direction and the second direction intersect.

When the detection cover 10 is placed on the box 110 of the battery 100, the first air blowing pipe 30 and the second air blowing pipe 40 blow out the airflow in preset directions respectively, so that the airflow blown out by the first air blowing pipe 30 and the second air blowing pipe 40 An air curtain can be formed together, and at least part of the air curtain is located around the opening 15, so that during the process of air extraction detection through the air extraction port 12 in the detection cover 10, the gas from the external environment is reduced from entering the detection chamber 11 from the opening 15, Reduce external interference, thereby improving the detection accuracy of the detection probe 20 and improving the stability of the detection results;

When the detection cover 10 is in a standby state without detection, since the external negative pressure device 96 is still turned on, the air suction port 12 continuously absorbs the air in the detection cavity 11, and the first air blowing pipe 30 and the second air blowing pipe 40 blow out air flows in preset directions respectively, so that the air flows blown out by the first air blowing pipe 30 and the second air blowing pipe 40 can form an air curtain together, and at least part of the air curtain is surrounded by the opening 15. In this way, most of the air supplemented to the detection cavity 11 from the outside comes from the air flows blown out by the first air blowing pipe 30 and the second air blowing pipe 40, thereby avoiding the interference gas in the external environment from being adsorbed on the detection probe 20 in large quantities, and then effectively delaying the passivation rate of the detection probe 20, extending the service life, and thus reducing the maintenance cost.

In some possible embodiments, the detection component includes multiple detection probes 20 , and all detection probes 20 are spaced apart from each other. Using multiple detection probes 20 to perform detection simultaneously can improve the detection accuracy and avoid errors caused by a certain detection probe 20 . Errors lead to misjudgment of results.

Specifically, multiple air extraction ports 12 can be provided, and can be distributed according to the position of the connecting seam where the first part 111 and the second part 112 of the box 110 cover each other, that is, each section of the connecting seam corresponds to one or more detection ports. The probe 20 is used to accurately detect the air tightness of the battery 100 .

Optionally, the detection assembly includes 2-4 air extraction ports 12, which are respectively arranged at the front, rear, left and right of the detection chamber 11. One or more detection probes 20 can be provided in each air extraction port 12.

In some possible embodiments, the air blowing pressure of the first air blowing pipe 30 is greater than or equal to the air suction pressure of the air suction port 12 . In this way, the air flow blown out by the first air blowing pipe 30 can form an air curtain. The air curtain is arranged around the opening 15 so that a slightly positive pressure environment can be formed in the detection chamber 11, which can effectively avoid interfering gases in the external environment. Entering into the detection chamber 11 from the opening 15 can effectively prevent interfering gases in the external environment from being adsorbed on the detection probe 20 in large quantities, thereby effectively delaying the passivation rate of the detection probe 20 and extending its service life, thus reducing maintenance costs. .

In the same way, the air blowing pressure of the second air blowing pipe 40 is greater than or equal to the air extraction pressure of the air extraction port 12; its function is also to form a slightly positive pressure environment in the detection chamber 11, which can effectively avoid interference in the external environment. Gas enters the detection chamber 11 from the opening 15 .

In some possible embodiments, refer to Figures 2 to 6; Figure 3 is a front view of the detection component provided by some embodiments of the present application, Figure 4 is an A-A cross-sectional view of the structure shown in Figure 3, and Figure 5 is Figure 3 The B-B cross-sectional view of the structure shown in FIG. 6 is a cross-sectional schematic diagram of the detection assembly provided by some embodiments of the present application; the detection cover 10 includes a cover top plate 13 and a plurality of cover side plates 14 .

A plurality of cover side panels 14 are connected end to end and are arranged around the periphery of the cover top panel 13 to form a detection cavity 11; the air extraction port 12 is arranged on the cover top panel 13, and the side opposite to the cover top panel 13 forms an opening 15 of the detection cavity 11. The cover top panel 13 can be in a variety of shapes, such as a single rectangular, circular, triangular and other regular shapes, or a complex shape formed by combining simple regular shapes such as rectangular, circular, triangular and the like, which is not limited in the embodiments of the present application.

In some possible embodiments, as shown in FIGS. 2 to 6 , the first air blowing pipe 30 blows air toward the cover top plate 13 and/or the cover side plate 14 .

Specifically, the first blow pipe 30 may be disposed on the side of the cover top plate 13 facing the detection chamber 11 . Wherein, the first direction is arranged parallel to the plate surface of the cover top plate 13; the first direction may be a certain direction within the plate surface.

The air flow blown out by the first blowing pipe 30 will flow along the cover side plate 14 on one side of the cover top plate 13 , and then be bent in the direction of the opening 15 under the action of the cover side plate 14 . In this way, the air flow around the opening 15 can An air curtain is formed on the side to reduce the gas from the external environment entering the detection chamber 11 from the opening 15 and reduce external interference, thereby improving the detection accuracy of the detection probe 20 and improving the stability of the detection results.

In some possible embodiments, as shown in FIGS. 2 to 6 , the detection component includes a first air supply pipe 31 , which is passed through the cover top plate 13 and connected with the first air blowing pipe 30 ; the first air supply pipe 31 31 is connected to an external air source or air pump, which can continuously provide clean gas to the first blow pipe 30 , thereby reducing a large amount of interfering gas in the external environment from being adsorbed on the detection probe 20 .

In some possible embodiments, as shown in FIGS. 2 and 3 , the first air blowing pipe 30 includes a plurality of first air blowing ports, and the blowing directions of at least two first air blowing ports are opposite.

For example, the first air blowing pipe 30 can be a straight pipe or a curved pipe. The middle part of the body of the first air blowing pipe 30 is connected with the first air supply pipe 31 to form a T-shaped structure. The two ends of the first air blowing pipe 30 are The first air blowing port can blow out airflow to both sides respectively.

In some other possible embodiments, the first air blowing pipe 30 can be an X-shaped pipe structure formed by crossing multiple pipes; referring to Figure 3, the first air blowing pipe 30 includes a first branch pipe 32 and a second branch pipe 33 that are interconnected, and the planes in which the first branch pipe 32 and the second branch pipe 33 are located are arranged parallel to the plate surface of the cover top plate 13; the first branch pipe 32 and the second branch pipe 33 are usually perpendicular to each other, but can also be set to an acute angle or an obtuse angle, which is subject to the design and is not limited to the embodiments of the present application.

The intersection of the first branch pipe 32 and the second branch pipe 33 is connected to the end of the first air supply pipe 31. In this way, the first air supply pipe 31 supplies air to the first branch pipe 32 and the second branch pipe 33 at the same time. Both sides of the first branch pipe 32 The blowing directions of the first blowing ports at both ends of the second branch pipe 33 are arranged parallel to the surface of the cover top plate 13; in this way, the airflow blown out by the first blowing pipe 30 can cover as many plane angles as possible, thereby forming The air curtain is arranged around the opening 15 to reduce interference gases in the external environment from entering the detection chamber 11 and being adsorbed on the detection probe 20 in large quantities, ultimately improving detection accuracy and extending service life.

Optionally, as shown in Figures 2 to 6, the detection assembly includes at least two first air blowing tubes 30; the two first air blowing tubes 30 are arranged at intervals. The airflow blown out by part of the first air blowing tubes 30 in the first direction faces the cover side plate 14 on one side; the airflow blown out by the other part of the first air blowing tubes 30 in the first direction faces the other cover side plate 14 on the opposite side.

In some possible embodiments, the second direction is configured to point in the direction of the opening 15 along the cover top plate 13 . That is to say, the second air blowing pipe 40 blows air in the direction toward the opening 15 along the cover top plate 13 .

Referring to FIG. 5 , the second blow pipe 40 is arranged along the second direction on the side of the cover side plate 14 facing the detection chamber 11 ; in this way, when the detection cover 10 is installed on the box 110 of the battery 100 , the second blow pipe 40 The airflow blown from 40 can be directly blown on the connection seam of the box 110 of the battery 100, and form a slightly positive pressure environment in the detection chamber 11, reducing the gas from the external environment entering the detection chamber 11, thereby improving the detection of the detection probe 20 accuracy and improve the stability of detection results.

In some other embodiments, as shown in FIG. 6 , the second blow pipe 40 is arranged along the second direction on the side of the cover side plate 14 facing away from the detection chamber 11 . In this way, the air flow blown out by the second air blowing pipe 40 forms an air curtain surrounding the opening 15 , thereby preventing a large amount of interfering gas in the external environment from being adsorbed on the detection probe 20 , thereby effectively delaying the passivation rate of the detection probe 20 , extend service life, thereby reducing maintenance costs.

In some possible embodiments, as shown in FIG. 4 , the detection component includes a second air supply pipe 41 ; the second air supply pipe 41 can be passed through the cover top plate 13 or the cover side plate 14 , depending on the design.

The second air supply pipe 41 is connected with an end of the second air blowing pipe 40 close to the cover top plate 13 , and an end of the second air blowing pipe 40 away from the cover top plate 13 blows air downward along the second direction. The second air supply pipe 41 is connected to an external air source or air pump, and can continuously provide clean gas to the second air blow pipe 40 , thereby reducing a large amount of interfering gas in the external environment from being adsorbed on the detection probe 20 .

Optionally, in conjunction with the orientation shown in FIG. 4 , the detection assembly includes at least two second blowing tubes 40 . Among them, part of the second air blowing pipe 40 is arranged on one side of the cover side plate 14 along the second direction and sprays air downward in a direction away from the cover top plate 13 , and the remaining part of the second air blowing pipe 40 is arranged on the opposite side along the second direction. The airflow is ejected downwardly from the cover side plate 14 on one side in a direction away from the cover top plate 13 .

Optionally, there may be multiple second air blowing tubes 40 , and one to three second air blowing tubes 40 are arranged on each cover side panel 14 . In this way, as much as possible, the air flow blown out by the second air blowing pipe 40 can form a wider air curtain around the opening 15, reducing the interference gas in the external environment from entering the detection chamber 11 and being adsorbed on the detection probe 20 in large amounts. Ultimately improving detection accuracy and extending service life.

In some embodiments, the detection component includes an air blowing pump (not shown). The air blowing pump can be connected to the first air blowing pipe 30 through the first air supply pipe 31; the air blowing pump can be connected to the second air blowing pipe 40 through the second air supply pipe 41; thus Clean gas is continuously provided to prevent interfering gas from entering the detection chamber 11 and being adsorbed on the detection probe 20 in large quantities.

A second aspect of the present application provides a detection device, including the above detection component.

In some possible embodiments, refer to Figures 1 to 7. Figure 7 is a schematic diagram of the principle of detection equipment provided by some embodiments of the present application; the detection equipment includes a controller 91, a clean air source 92, and a first control valve 93 , the second control valve 94, the detection pipeline 95 and the negative pressure device 96.

One end of the detection pipe 95 is connected to the negative pressure device 96 , the air extraction port 12 is connected to the other end of the detection pipe 95 through the first control valve 93 , and the clean air source 92 is connected to the other end of the detection pipe 95 through the second control valve 94 . The controller 91 controls and connects the first control valve 93 , the second control valve 94 and the clean air source 92 ; the detection probe 20 is connected with the controller 91 via signals.

The detection probe 20 is arranged in the detection pipe 95; the negative pressure device 96 can be a vacuum pump, and the clean air source 92 can provide clean gas into the detection pipe 95, thereby preventing interference gas from being adsorbed on the detection probe 20 in large quantities. The controller 91 provides feedback to the operator to confirm the current sealing condition of the battery based on the signal fed back by the detection probe 20 .

A third aspect of the present application provides a detection method for a detection device, as shown in Figure 8 , which is a flow chart of a detection method provided by some embodiments of the present application.

Detection methods include:

S10. Determine the current status of the detection equipment. The current status of the detection equipment can be determined by manually inputting relevant instructions, or by setting corresponding sensors in the detection cover 10. When the detection cover 10 is placed on the box 110 of the battery 100, the sensor is triggered, and the detection equipment enters detection state, otherwise, it is in standby state.

S20. If the detection equipment is currently in the detection state, open the first control valve 93, close the second control valve 94, and close the clean air source 92. The controller 91 determines that the detection equipment is currently in the detection state, and controls the first air blowing pipe 30 and the second air blowing pipe 40 to blow out clean airflow in preset directions respectively, so that the airflow blown out by the first air blowing pipe 30 and the second air blowing pipe 40 surrounds It is provided on the peripheral side of the opening 15 to reduce the interference gas from the external environment entering the detection chamber 11 from the opening 15, thereby reducing the interference gas from entering the detection pipe 95 from the air extraction port 12, thereby preventing the interference gas in the external environment from being adsorbed in large quantities. On the detection probe 20, the passivation rate of the detection probe 20 can be effectively delayed, the service life of the detection probe 20 can be extended, and the maintenance cost can be reduced.

S30. If the detection equipment is currently in the standby state, close the first control valve 93, open the second control valve 94, and open the clean air source 92. The controller 91 determines that the detection equipment is currently in a standby state, and controls the first control valve 93 to close to ensure that interfering gases from the external environment will not enter the detection pipe 95 from the air extraction port 12. At the same time, the opened negative pressure device 96 is in continuous extraction. In the air process, the clean air source 92 supplies air to the negative pressure device 96 through the second control valve 94 to ensure that the negative pressure device 96 will not be damaged due to air condition; the gas in the clean air source 92 is generally filtered or purified, and contains Interfering gas components, therefore, supplying gas from the clean air source 92 to the detection pipe 95 can effectively prevent a large amount of interfering gas in the external environment from being adsorbed on the detection probe 20, thereby effectively delaying the passivation rate of the detection probe 20 , extend service life, thereby reducing maintenance costs.

It should be noted that when the detection equipment is in a standby state, the first air blowing pipe 30 and the second air blowing pipe 40 can stop blowing out the air flow, or can continue to blow air, thereby reducing the interfering gas components in the gas in the detection chamber 11, as Be prepared for the next test.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims (14)

1. A detection component, characterized in that it includes: A detection cover (10) has a detection cavity (11) with a bottom opening (15), and at least one air extraction port (12) is formed on the wall of the detection cover (10); A detection probe (20) is provided in the detection chamber (11) and/or the air extraction port (12); At least one first blow pipe (30) is provided on the detection cover (10); And at least one second air blowing pipe (40) is provided on the detection cover (10) and intersects with the blowing direction of the first air blowing pipe (30); The airflows blown out by the first air blowing pipe (30) and the second air blowing pipe (40) are at least partially arranged around the periphery of the opening (15); The detection component also includes an air blowing pump, a first air supply pipe (31) and a second air supply pipe (41). The air blowing pump is connected to the first air blowing pipe (30) through the first air supply pipe (31); the air blowing pump The second air blowing pipe (40) is connected through the second air supply pipe (41); The detection hood (10) comprises a hood top plate (13) and a plurality of hood side plates (14); the plurality of hood side plates (14) are connected end to end and arranged around the circumference of the hood top plate (13) to form the detection cavity (11); the air extraction port (12) is arranged on the hood top plate (13). 2. The detection component according to claim 1, characterized in that the detection component includes a plurality of detection probes (20), and all the detection probes (20) are arranged at intervals. 3. The detection assembly according to claim 1, characterized in that the air blowing pressure of the first air blowing pipe (30) is greater than or equal to the air extraction pressure of the air extraction port (12); and/or, The air blowing pressure of the second air blowing pipe (40) is greater than or equal to the air extraction pressure of the air extraction port (12). 4. The detection assembly according to claim 1, characterized in that the first air blowing pipe (30) blows air toward the cover top plate (13) and/or the cover side plate (14). 5. The detection assembly according to claim 1, characterized in that the first blow pipe (30) is provided on the side of the cover top plate (13) facing the detection chamber (11). 6. The detection assembly according to claim 5, characterized in that the first air supply pipe (31) penetrates the cover top plate (13) and is connected with the first air blowing pipe (30). 7. The detection assembly according to claim 1, characterized in that the first air blowing pipe (30) includes a plurality of first air blowing ports, and the blowing directions of at least two first air blowing ports are opposite. 8. The detection assembly according to claim 6, characterized in that the first air blowing pipe (30) comprises a first branch pipe (32) and a second branch pipe (33) which are interconnected; The intersection of the first branch pipe (32) and the second branch pipe (33) is connected to the first air supply pipe (31). Both ends of the first branch pipe (32) and the second branch pipe (33) The blowing directions at both ends of 33) are set parallel to the surface of the cover top plate (13). 9. The detection assembly according to claim 1, characterized in that the second blowing pipe (40) blows air in a second direction, and the second direction is configured to point toward the cover top plate (13). The direction of the opening (15). 10. The detection assembly according to claim 1, characterized in that the second air blowing pipe (40) is arranged on a side of the cover side plate (14) facing the detection chamber (11); or, the second air blowing pipe (40) is arranged on a side of the cover side plate (14) facing away from the detection chamber (11). 11. The detection assembly according to claim 9, characterized in that the second air supply pipe (41) penetrates the cover top plate (13) or the cover side plate (14); The air pipe (41) is connected with the end of the second air blow pipe (40) close to the cover top plate (13), and the end of the second air blow pipe (40) away from the cover top plate (13) is along the second end of the air blow pipe (40). Blow in downward direction. 12. A detection device, characterized by comprising the detection component according to any one of claims 1 to 11. 13. The detection equipment according to claim 12, characterized in that the detection equipment includes a controller (91), a clean air source (92), a first control valve (93), a second control valve (94), Detection pipeline (95) and negative pressure device (96); One end of the detection pipeline (95) is connected to the negative pressure device (96), the air extraction port (12) is connected to the other end of the detection pipeline (95) via the first control valve (93), and the clean air source (92) is connected to the other end of the detection pipeline (95) via the second control valve (94); the detection probe (20) is arranged in the detection pipeline (95); The controller (91) controls and connects the first control valve (93), the second control valve (94) and the clean air source (92); the detection probe (20) and the controller (91) signal connect. 14. A detection method, applied to the detection equipment according to claim 13, characterized in that the detection method includes: Determine the current status of the detection equipment; If the detection equipment is currently in the detection state, open the first control valve, close the second control valve, and close the clean air source; If the detection device is currently in standby mode, the first control valve is closed, the second control valve is opened, and the clean air source is turned on.