CN220627909U - BDU cooling system and vehicle - Google Patents

Abstract

The utility model discloses a BDU cooling system and a vehicle. The BDU cooling system comprises a BDU body, a first heat conduction pad and a heat pipe, wherein the lower side surface of the first heat conduction pad is attached to the top of the BDU body; the heat pipe is provided with an evaporation section, an insulation section and a condensation section, wherein the evaporation section is arranged on the upper side surface of the first heat conduction pad. The utility model is used for cooling all electric parts in the BDU body, has good cooling effect and is beneficial to ensuring the working performance of all electric parts in the BDU.

Description

BDU cooling system and vehicle

Technical field

The utility model relates to the technical field of vehicle parts, and in particular to a BDU cooling system and a vehicle.

Background technique

Battery Distribution Unit (BDU), referred to as BDU, controls the power on and off process, precharge process, and charging process of the high-voltage electrical circuit in the battery pack. It mainly consists of main contactor, fast charge contactor, precharge resistor, and precharge contact. It consists of circuit breakers, fuses, current sensors, etc. During rapid acceleration or fast charging of the vehicle, the electrical components in the BDU will generate heat due to the impact of large currents. If the cooling is insufficient, it is easy to catch fire and cause safety accidents. Therefore, it is necessary to cool various electrical components in the BDU. At present, most of the cooling methods used to cool various electrical components in the BDU are natural cooling or water cooling, and the cooling effect is poor.

Utility model content

In view of this, the present utility model aims to propose a BDU cooling system. The BDU cooling system is used to cool each electrical component in the BDU body. The cooling effect is good and is conducive to ensuring the working performance of each electrical component in the BDU body.

In order to achieve the above purpose, the technical solution of the present invention is achieved as follows:

A BDU cooling system including:

BDU body;

A first thermal pad, the lower side of the first thermal pad is attached to the top of the BDU body;

A heat pipe has an evaporation section, an insulation section and a condensation section, and the evaporation section is arranged on the upper side of the first thermal pad.

According to some embodiments of the present invention, there are multiple heat pipes.

According to some embodiments of the present invention, a plurality of the heat pipes are arranged in an array.

According to some embodiments of the present invention, the internal pressure of the heat pipe is 10 ^-1 ~ 10 ^-4 Pa.

According to some embodiments of the present invention, the number of the first thermal pad is one.

According to some embodiments of the present invention, the BDU cooling system further includes a second thermal pad connected to the condensation section.

According to some embodiments of the present invention, the number of the second thermal pad is one.

According to some embodiments of the present invention, the BDU cooling system further includes heat dissipation fins connected to the condensation section of the heat pipe and located below the second thermal pad.

According to some embodiments of the present invention, there are multiple heat dissipation fins, and a plurality of the heat dissipation fins are spaced apart along the axial direction of the heat pipe, and the heat pipe is passed through the heat dissipation fins. middle.

Compared with the existing technology, the BDU cooling system of the present invention has the following advantages: by arranging a first thermal pad on the BDU body and arranging a heat pipe on the upper side of the first thermal pad, when the BDU body is working, the inside of the BDU body The heat generated by the electrical components will be introduced into the heat pipe through the first thermal pad. The evaporation of the working medium in the heat pipe can take away the heat of the electrical components in the BDU body. On the one hand, the purpose of cooling the BDU body is achieved and the heat dissipation in the BDU body is reduced. The temperature rise of the electrical components during operation keeps the temperature of the electrical components in the BDU body within a certain range, thereby improving the current carrying capacity of the electrical components in the BDU body and ensuring the working performance of each electrical component in the BDU body; on the other hand, Since the heat pipe takes away heat along with the phase change of the internal working medium, compared with cooling methods such as air cooling and water cooling, the cooling speed of the present utility model is faster, the cooling effect is better, it is environmentally friendly and the cost is lower.

Another object of the present invention is to provide a vehicle, which includes a battery pack, and the battery pack includes a BDU cooling system according to an embodiment of the present invention.

Compared with the prior art, the vehicle of the present invention has the same advantages as the BDU cooling system of the embodiment of the present invention, which will not be described again here.

Description of the drawings

The drawings that constitute a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the attached picture:

Figure 1 is an overall schematic diagram of a BDU cooling system according to an embodiment of the present invention.

Figure 2 is a schematic structural diagram of a heat pipe in a BDU cooling system according to an embodiment of the present invention.

Explanation of reference symbols:

BDU cooling system 1000;

BDU body 1; first thermal pad 2; heat pipe 3; second thermal pad 4; heat dissipation fins 5;

Evaporation section L ₁ ; adiabatic section L ₂ ; condensation section L ₃ .

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

The present utility model will be described in detail below with reference to Figures 1 and 2 and in conjunction with embodiments.

As shown in Figure 1, a BDU cooling system 1000 according to an embodiment of the present invention includes a BDU body 1, a first thermal pad 2 and a heat pipe 3. The lower side of the first thermal pad 2 is attached to the top of the BDU body 1; the heat pipe 3 There is an evaporation section L ₁ and a condensation section L ₃ , and the evaporation section L ₁ is disposed on the upper side of the first thermal conductive pad 2 .

Specifically, BDU body 1 refers to the battery energy distribution unit. BDU body 1 controls the power on and off process, precharge process, and charging process of the high-voltage electrical circuit in the battery pack. It mainly consists of the main contactor, fast charge contactor, and precharge resistor. , precharge contactor, fuse, current sensor and other electrical components.

The lower side of the first thermal pad 2 is in contact with the top of the BDU body 1 . It can be understood that, on the one hand, the first thermal pad 2 is used to provide an installation connection position for the heat pipe 3; on the other hand, the first thermal pad 2 has good thermal conductivity and good insulation performance, and the lower part of the first thermal pad 2 The side is directly connected to the top of the electrical components in the BDU body 1, so that the heat generated by the electrical components in the BDU body 1 can be directly transferred to the first thermal pad 2, which is conducive to rapid transfer of the heat generated by the electrical components in the BDU body 1. Go out and ensure the normal working process of the electrical components in BDU body 1. Specifically, for example, the first thermally conductive pad 2 may be a thermally conductive silicone pad.

The heat pipe 3 has an evaporation section L ₁ , an insulation section L ₂ and a condensation section L ₃ . The evaporation section L ₁ is arranged on the upper side of the first thermal pad 2 , and the condensation section L ₃ is in ambient air. Specifically, as shown in Figure 2, one end of the heat pipe 3 is an evaporation section _L1 , the other end is a condensation section _L3 , and the middle is an adiabatic section _L2 . In the evaporation section L ₁ of the heat pipe 3, the working medium in the core of the heat pipe 3 absorbs the heat of the first thermal pad 2 and evaporates, taking away the heat. The steam flows from the central channel of the heat pipe 3 to the condensation section L ₃ of the heat pipe 3. The steam After the condensation section L ₃ exchanges heat with the ambient air, it becomes liquid and flows back to the evaporation section L ₁ under the action of gravity, completing a cycle. Since the cooling of the heat pipe 3 is accompanied by the phase change of the internal working fluid, compared with cooling methods such as air cooling and water cooling, the present utility model uses the heat pipe 3 to cool the BDU body 1, which has a fast cooling speed and good cooling effect.

The working process of the BDU cooling system 1000 according to the embodiment of the present invention is introduced below. When the BDU body 1 is working, the electrical components in the BDU body 1 dissipate heat. Since the lower side of the first thermal pad 2 is attached to the top of the BDU body 1, the electrical components in the BDU body 1 can transfer heat to the first On the thermal pad 2, since the evaporation section L ₁ of the heat pipe 3 is disposed on the upper side of the first thermal pad 2, the first thermal pad 2 will transfer heat to the evaporation section L ₁ of the heat pipe 3, thereby making the heat pipe 3 The evaporation section L ₁ is heated, and the working medium in the heat pipe 3 evaporates after being heated. The evaporated medium reaches the condensation section L ₃ and exchanges heat with the ambient air and is liquefied. Finally, it flows back along the side wall of the heat pipe 3 to the evaporation section L ₁ to achieve continuous The cycle repeatedly removes heat. Therefore, the BDU cooling system 1000 of the present invention can realize the purpose of cooling and dissipating heat of the BDU body 1, and can reduce the temperature rise of the electrical components in the BDU body 1 during operation, so that the temperature of the electrical components in the BDU body 1 is within a certain range. , thereby improving the current carrying capacity of the electrical components in the BDU body 1 and ensuring the working performance of each electrical component in the BDU body 1.

According to the BDU cooling system 1000 of the embodiment of the present invention, the first thermal pad 2 is provided on the BDU body 1 and the heat pipe 3 is provided on the upper side of the first thermal pad 2. Therefore, when the BDU body 1 is working, the internal electrical power of the BDU body 1 is The heat generated by the components will be introduced into the heat pipe 3 through the first thermal pad 2. The evaporation of the working medium in the heat pipe 3 can take away the heat of the electrical components in the BDU body 1. On the one hand, the purpose of cooling the BDU body 1 is achieved. Reduce the temperature rise of the electrical components in the BDU body 1 during operation, so that the temperature of the electrical components in the BDU body 1 is within a certain range, thereby improving the current carrying capacity of the electrical components in the BDU body 1 and ensuring that each electrical component in the BDU body 1 On the other hand, since the heat pipe 3 takes away heat along with the phase change of the internal working medium, compared with cooling methods such as air cooling and water cooling, the cooling speed of the present utility model is faster and the cooling effect is Better, environmentally friendly and less expensive.

According to some embodiments of the present invention, as shown in Figure 1, there are multiple heat pipes 3. It can be understood that, on the one hand, multiple heat pipes 3 can be provided to achieve faster heat dissipation; on the other hand, multiple heat pipes 3 can be provided at different positions of the first thermal pad 2, so that different heat pipes in the BDU body 1 can be The electrical parts at the location can quickly dissipate heat. Alternatively, as shown in Figure 1, multiple heat pipes 3 may be arranged in an array.

According to some embodiments of the present invention, the internal pressure of the heat pipe 3 is 10 ^-1 ~ 10 ^-4 Pa. That is to say, the inside of the heat pipe 3 is in a negative pressure state, which makes it easier for the working medium in the heat pipe 3 to evaporate, and the BDU cooling system 1000 of the present invention has a better cooling and heat dissipation effect.

According to some embodiments of the present invention, as shown in FIG. 1 , the number of the first thermal pad 2 is one. That is to say, multiple heat pipes 3 are arranged on one first thermal pad 2. In this way, some electrical components that are too hot inside the BDU body 1 can quickly transfer heat to the condensation of different heat pipes 3 through the first thermal pad 2. Segment L ₃ , so that multiple heat pipes 3 can take away heat at the same time, which is conducive to more efficient heat dissipation and helps to avoid the problem of excessive local temperature of the BDU body 1 .

According to some embodiments of the present invention, as shown in FIG. 1 , the BDU cooling system 1000 further includes a second thermal pad 4 , and the second thermal pad 4 is connected to the condensation section L ₃ of the heat pipe 3 . It can be understood that the second thermally conductive pad 4 is provided so that the heat on the condensation section _L3 of the heat pipe 3 can be transferred to the second thermally conductive pad 4. Since the second thermally conductive pad 4 has a larger area, it exchanges with the surrounding air. The speed of heat is faster, which is beneficial to increasing the heat dissipation speed and heat dissipation effect of the BDU cooling system 1000 of the present invention on the BDU body 1 .

According to some embodiments of the present invention, as shown in FIG. 1 , the number of the second thermal pad 4 is one. That is to say, the condensation sections L ₃ of the plurality of heat pipes 3 are all connected to a second thermal conductive pad 4 , so that when the temperature of the condensation sections L ₃ of some heat pipes 3 among the plurality of heat pipes 3 is relatively high, it is beneficial to Individual heat pipes 3 with higher temperatures can quickly transfer heat away, thereby helping to avoid the problem of excessive local temperature of the BDU body 1 .

According to some embodiments of the present invention, as shown in FIG. 1 , the BDU cooling system 1000 further includes heat dissipation fins 5 , which are connected to the condensation section L ₃ of the heat pipe 3 and located below the second thermal pad 4 . It should be noted that the heat in the condensation section L3 of the heat pipe ₃ can be transferred to the heat dissipation fins 5. The provision of the heat dissipation fins 5 is conducive to further increasing the heat exchange area between the condensation section L3 of the heat pipe ₃ and the ambient air, which is beneficial to Dissipate heat more efficiently.

Optionally, for example, there are multiple heat dissipation fins 5 , the plurality of heat dissipation fins 5 are arranged at intervals along the axial direction of the heat pipe 3 , and the heat pipe 3 is inserted into the heat dissipation fins 5 .

Another object of the present invention is to provide a vehicle, which includes a battery pack. The battery pack includes the BDU cooling system 1000 according to an embodiment of the present invention.

Compared with the prior art, the vehicle of the present invention has the same advantages as the BDU cooling system 1000 in the embodiment of the present invention, which will not be described again here.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The directions or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the device referred to. Or elements must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limitations on the invention. In addition, features defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral 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; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material or characteristic that is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in within the protection scope of this utility model.

Claims (8)

1. A BDU cooling system, characterized by including: BDU body(1); A first thermal pad (2), the lower side of the first thermal pad (2) is attached to the top of the BDU body (1); Heat pipe (3). The heat pipe (3) has an evaporation section, an insulation section and a condensation section. The evaporation section is arranged on the upper side of the first thermal conductive pad (2). The heat pipe (3) is provided with multiple The number of the first thermal pad (2) is one. 2. The BDU cooling system according to claim 1, characterized in that a plurality of the heat pipes (3) are arranged in an array. 3. The BDU cooling system according to claim 1, characterized in that the internal pressure of the heat pipe (3) is 10 ^-1 ~ 10 ^{- 4} Pa. 4. The BDU cooling system according to any one of claims 1 to 3, characterized in that it further includes a second thermal conductive pad (4), and the second thermal conductive pad (4) is connected to the condensation section. 5. The BDU cooling system according to claim 4, characterized in that the number of the second thermal pad (4) is one. 6. The BDU cooling system according to claim 4, further comprising a heat dissipation fin (5) connected to the condensation section of the heat pipe (3) and located at the third 2. Underneath the thermal pad (4). 7. The BDU cooling system according to claim 6, characterized in that there are multiple heat dissipation fins (5), and the multiple heat dissipation fins (5) are along the axis of the heat pipe (3). Arranged at intervals, the heat pipes (3) are penetrated in the heat dissipation fins (5). 8. A vehicle, characterized in that it includes a battery pack, and the battery pack includes the BDU cooling system according to any one of claims 1-7.