CN121355485A - Battery casing components, battery casing, traction battery, and methods for manufacturing battery casing components. - Google Patents

Battery casing components, battery casing, traction battery, and methods for manufacturing battery casing components.

Info

Publication number
CN121355485A
CN121355485A CN202410948881.3A CN202410948881A CN121355485A CN 121355485 A CN121355485 A CN 121355485A CN 202410948881 A CN202410948881 A CN 202410948881A CN 121355485 A CN121355485 A CN 121355485A
Authority
CN
China
Prior art keywords
battery
battery case
polyamide
mixture
microns
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410948881.3A
Other languages
Chinese (zh)
Inventor
徐海林
谢孝勋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cotex Texron Co Ltd And Chuanghe Co
Original Assignee
Cotex Texron Co Ltd And Chuanghe Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cotex Texron Co Ltd And Chuanghe Co filed Critical Cotex Texron Co Ltd And Chuanghe Co
Priority to CN202410948881.3A priority Critical patent/CN121355485A/en
Priority to PCT/EP2025/070171 priority patent/WO2026017658A1/en
Publication of CN121355485A publication Critical patent/CN121355485A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/122—Composite material consisting of a mixture of organic and inorganic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14—Lactams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/229—Composite material consisting of a mixture of organic and inorganic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B29K2077/10—Aromatic polyamides [polyaramides] or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/10—Mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7146—Battery-cases
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

本申请电池壳部件、电池壳、牵引电池及生产电池壳部件的方法，特别地公开了一种包含复合材料的电池壳部件，其特征在于所述复合材料包含：包含聚酰胺6和无定形聚酰胺的聚合物组合物；以及纤维材料。This application discloses a battery casing component, a battery casing, a traction battery, and a method for producing a battery casing component. In particular, it discloses a battery casing component comprising a composite material, characterized in that the composite material comprises: a polymer composition comprising polyamide 6 and amorphous polyamide; and a fibrous material.

Description

Battery case component, battery case, traction battery and method for producing battery case component
Technical Field
The present invention relates to a battery case member and a battery case including a battery case member for a traction battery of an automotive vehicle. Furthermore, the invention relates to a method for producing a battery case component. Finally, the invention relates to a traction battery.
Background
Warpage is one of the common problems of fiber reinforced thermoplastic composites, especially for resins with crystalline behaviour, such as polyamide6 (polyamide 6). Many approaches have been directed to improving both the materials used and the processes used to reduce warpage.
The use of flat fibers (i.e., fibers having a non-circular cross-section) is a promising approach to reduce warpage and improve the flatness of the part and is applied in many cases, especially when injection molding processes are applied. The improvement of the flatness of the flat fiber is achieved because the cross section of the flat fiber has an elliptical shape. Such a non-circular cross-section helps to reduce the difference between the shrinkage of the material in the flow direction and in the transverse direction. In this way, the internal stress generated is smaller, and the flatness of the molded part is improved.
The forming process parameters are key factors that further affect warpage, such as forming temperature, mold temperature, cooling pressure, cooling time, post-cooling application, and the like. In general, a range of different process parameters are tried to maximize flatness, even when this means other properties are sacrificed.
Providing molded structures with ribs, reinforcing geometries or with continuous fiber reinforced composite sheet sandwich structures is also an effective method of improving flatness.
Nevertheless, these methods may result in additional space being taken up by the ribs or reinforcing geometry. Furthermore, the formation of a continuous fiber reinforced composite sheet sandwich structure can be a complex process.
Disclosure of Invention
An object of the present invention is to provide a battery case member having increased stability and improved flatness.
This object of the invention is achieved by a battery housing part having the features described herein. Advantageous embodiments of the battery housing component are specifically described herein.
More specifically, the object of the invention is achieved by a battery housing part comprising a composite material, characterized in that the composite material comprises a polymer composition comprising polyamide 6 and an amorphous polyamide and a fibrous material.
The battery case member according to the present invention exhibits improved stability and flatness. In particular, it has been surprisingly found that the addition of an amorphous polyamide to a resin results in an improvement in the stability and flatness of the battery case member.
The amorphous polyamide is preferably made from aromatic amine monomers, such as diamine monomers. The aromatic portion of the monomer can prevent the formation of crystalline structures in the polymer and thus provide an amorphous polymer. Preferably, the amorphous polyamide is made from a resin mixture comprising two different (diamine) monomers. Preferably, the amorphous polyamide is made from a resin mixture comprising hexamethylenediamine isophthalic acid and hexamethylenediamine terephthalic acid. In a preferred embodiment, the resin mixture comprises a (weight/weight) -% ratio (weight%) of hexamethylenediamine isophthalic acid to hexamethylenediamine terephthalic acid of 90/10 to 50/50, 80/20 to 60/40 or 75/25 to 65/35.
All values expressed in weight% in this specification are based on the weight of the total composite, unless otherwise indicated.
The weight value should be understood in such a way that, for example, if the total composite contains 10% by weight of substance a and the total composite has a weight of 1kg, this means that the 10% by weight value corresponds to 100g. In a further example, a composition comprising substance a and substance B in a ratio of 90/10 wt% means that the composition may comprise 90g of substance a and 10g of substance B.
The composite material of the battery case member according to the present invention preferably comprises 5 to 50 wt%, 10 to 45 wt%, 10 to 35 wt%, 15 to 35 wt%, or 15 to 25 wt% amorphous polyamide.
The amorphous polyamide present in the above concentration is particularly suitable for improving the flatness of the battery case member of the present invention.
The composite material of the battery case member according to the present invention may alternatively preferably contain 5 to 15 wt% of mica powder and 5 to 40 wt%, 10 to 35 wt%, 10 to 25 wt%, 5 to 25 wt%, or 5 to 15 wt% of amorphous polyamide.
It has surprisingly been found that about half of the mass of amorphous polyamide can be replaced by a corresponding mass of mica powder which is cheaper than amorphous polyamide. For example, it has been found that 5 to 15% by weight of the amorphous polyamide can be replaced by 5 to 15% by weight of mica powder, in particular 8 to 12%, 9 to 11% or 10% by weight of mica powder.
Mica powder comprises a complex group of aqueous aluminosilicate minerals of the general formula X 2Y4-6Z8O20(OH,F)4, where X (predominantly) is K, na or Ca, Y (predominantly) is Al, mg or Fe, and Z (predominantly) is Si or Al. Mica powder materials are monoclinic and there is a tendency toward pseudo-hexagonal crystals. The atoms of the mica powder material are arranged in a hexagonal plate shape. The mica powder material may be, for example, muscovite or phlogopite. The mica powder has a particle diameter of at least 80 mesh, 100 mesh or 150 mesh, or at most 0.100mm, 0.150mm or 0.180mm. The particle diameter may be 0.001 to 0.180mm, 0.010 to 0.180mm or 0.050 to 0.180mm.
Polyamide 6 is polycaprolactam. The relative viscosity of polyamide 6 may be 1.0 to 4.0 or 1.8 to 3.6.
The battery case member according to the present invention advantageously has a flatness of less than 6mm, 5mm or 4mm in a planar area of the battery case member extending over a length of 30 cm.
The battery case member according to the present invention preferably comprises 10 to 70 wt%, 55 to 60 wt%, 20 to 50 wt%, 25 to 45 wt%, or 30 to 40 wt% of the polymer composition comprising polyamide 6.
The polymer composition of the composite material of the battery case member according to the present invention preferably comprises 70 to 100 wt%, 75 to 90 wt%, 75 to 85 wt% of polyamide 6.
Preferably, the composite material may further comprise additives, wherein the additives may include antioxidants (e.g., hindered phenols), lubricants (e.g., ethylene bis stearamide, EBS; zinc stearate), colorants, and/or mold release agents. The additives may be provided in the polymer composition or separately from the polymer composition.
If the additive is included in the polymer composition, the polymer composition includes 0-30 wt.%, 10-27 wt.%, or 15-25 wt.% of the additive.
If the additive is provided separately from the polymer composition, the polymer composition comprises 99 to 100 wt.% polyamide 6 and the composite comprises 0 to 6 wt.%, 2 to 5 wt.%, or 3 to 5 wt.% additive.
Polyamide 6 having the above concentration is particularly suitable for improving the flatness of the battery case member of the present invention.
The composite material of the battery case member according to the present invention preferably comprises 15 to 80 wt%, 20 to 75 wt%, 25 to 70 wt%, 40 to 60 wt%, 35 to 55 wt%, or 40 to 50 wt% of the fibrous material.
The fibrous material having the above concentration is particularly suitable for improving the flatness of the battery case member of the present invention.
The fibrous material may exhibit glass fibers and/or aramid fibers and/or carbon fibers, preferably glass fibers.
The fiber diameter of the fiber material used in the composite material of the battery case member according to the present invention is preferably 5 to 25 micrometers, 8 to 23 micrometers, 10 to 23 micrometers, 12 to 21 micrometers, 14 to 19 micrometers, or 16 to 18 micrometers.
The fibrous material exhibiting the above fiber diameters is particularly suitable for improving the flatness of the battery case member of the present invention.
The fibrous material used in the composite material of the battery case member according to the present invention may have a circular or non-circular cross section. Surprisingly, it was found that the use of amorphous polyamide allows to improve the flatness and strength of the battery case member even when a fibrous material having a circular cross section is used.
The fibrous material used to produce the composite material of the battery case member according to the present invention may be in the form of chopped strands, rovings, or any other suitable form.
The fibrous material used to produce the composite material of the battery case member according to the present invention may have a coating layer that improves the bonding with polyamide 6 and/or amorphous polyamide. The coating (or sizing) is not particularly limited and may be a fiber mechanical reinforcement impregnant, a braiding impregnant, a silane, or a polymer, such as a thermoset or/and a polymer containing maleic acid or anhydride.
Preferably, the composite material may further comprise an antioxidant, a lubricant and/or a release agent.
The extrusion part is preferably designed such that the fiber grating is embedded in the matrix material, wherein the matrix material is integrally bonded to the polymer melt.
Correspondingly designed extruded parts have even greater stability. This is because by embedding the fibrous material in the matrix material, forces can be better transferred from the extruded part to the fibers in the assembly. By means of the correspondingly designed extrusion part, a better penetration of the fiber grating into the plastic material is achieved, so that the stability of the extrusion part is increased.
The invention also relates to a molded battery case component made from a battery case component according to the invention and characterized herein, wherein the molded battery case component is obtainable from the battery case component by compression molding or injection molding.
Advantageously, the battery case member of the present invention may be formed by compression molding or injection molding.
It is another object of the present invention to provide a battery case having increased stability and reduced production costs.
This object of the invention is achieved by a battery case having the features described herein. More precisely, this object of the invention is achieved by a battery case for a traction battery, wherein the battery case has at least one extruded part as described above in the present specification.
The extrusion part is preferably designed as a battery housing, which in turn is designed as a battery housing upper housing or battery housing lower housing. Even more preferably, the battery case has a first extruded part designed as an upper case of the battery case and a second extruded part designed as a lower case of the battery case.
Another object of the present invention is to provide a traction battery with increased stability and reduced production costs.
The object of the invention is achieved by a traction battery having the features described herein. More accurately. This object of the invention is achieved by a traction battery for a motor vehicle, wherein the traction battery has a battery housing as described above in the present description, wherein at least one battery assembly is contained inside the battery housing.
The battery assembly may be designed as a battery module (battery module) and/or a battery cell (battery cell).
It is a further object of the present invention to provide a method for producing a battery housing part as defined in the present specification. This object of the invention is achieved by the method described herein.
More precisely, this object of the invention is achieved by a method for producing a battery case component by means of an extrusion tool, having the following method steps:
-mixing and melting a polymer composition comprising polyamide 6 and amorphous polyamide to provide a melt;
-mixing the melt with a fibrous material in an extrusion tool to provide a mixture;
-extruding the mixture at a temperature lower than 280 ℃.
The method advantageously provides a battery case component with improved stability and flatness. Another advantage is that the extrusion temperature can be lower than in extrusion processes without amorphous polyamide and thus the energy requirements and production costs are reduced. This is probably due to the fact that the amorphous polyamide has a lower melting point (about 130-160 ℃) than polyamide 6 (about 215 ℃).
The extrusion tool may be any suitable extrusion tool, such as a twin screw extruder.
In the method according to the invention, the mixture may be extruded via any suitable die, for example a die providing an extrusion die with a rectangular cross-section.
In the process according to the invention, the mixture may be extruded at a temperature below 270 ℃, 260 ℃, 250 ℃ or 245 ℃.
It has surprisingly been found that the extrusion temperature can be reduced to the values indicated above, thereby further reducing the energy requirements and the production costs.
The method according to the invention may further comprise the steps of:
-cutting the extruded mixture into pieces of predetermined weight;
Transferring at least one of the blocks to a molding press at a temperature of 200 ℃ to 300 ℃;
-compression moulding the at least one block in the moulding press.
The advantage associated with this additional step is that the block can be transferred to the molding machine at a lower temperature than would be required if a mixture without the amorphous polyamide was used, and thus the energy consumption and ultimately the production costs are reduced. This is probably due to the fact that the amorphous polyamide has a lower melting point (about 130-160 ℃) than polyamide 6 (about 215 ℃).
In the process according to the invention, the mixture can be transferred at a temperature of 210 ℃ to 280 ℃, 215 ℃ to 270 ℃, 220 ℃ to 260 ℃ or 235 ℃ to 245 ℃.
It has surprisingly been found that the transfer temperature can be reduced even further to the values indicated above, thereby further reducing the energy requirements and the production costs.
The predetermined weight may substantially or entirely correspond to the weight of the finally obtained battery case member.
In the method according to the invention, the extruded mixture may be cut into pieces having a predetermined weight and a predetermined length.
The predetermined length may depend on the size of the die of the molding machine.
Instead of including the step of compression molding into the method of the present invention, the method may further include the steps of:
the mixture is injection molded to provide a battery case component.
Drawings
Further advantages, details and features of the invention can be found in the embodiments described below. In the drawings, in detail:
Fig. 1 schematically illustrates a process for producing a battery case member;
Fig. 2 schematically shows how a scale is applied to a battery case member to determine flatness of the battery case member.
Detailed Description
In the following description, like reference numerals denote like components or features, so that the description of components with reference to one drawing is also applicable to other drawings, thereby avoiding repetition of the description. Furthermore, each feature that has been described in connection with one embodiment may be used alone in other embodiments.
Fig. 1 illustrates a compression molding process, in this case a direct long fiber technology (D-LFT, here thermoplastic molding) process. However, a granular long fiber technology (G-LFT) process may also be used. After drying, the amounts of polyamide 6 and amorphous polyamide resin as indicated below are fed via feeder 2 into extruder 3, mixed and melted to provide a melt comprising a polymer composition comprising polyamide 6 and amorphous polyamide. The melt is conveyed to an extruder 6 (e.g. a twin screw extruder) and mixed with the fibrous material 4 obtained from the at least one fibrous material roving 5. The mixture is extruded through an extruder 6 via a die that provides the extruded mixture with a rectangular cross-sectional shape.
The mixture is loaded onto a conveyor belt 7. On the conveyor belt 7, the extruded mixture is cut into pieces 8 having a certain weight and length. The weight corresponds to the expected weight of the battery case member 1 to be formed by each block 8. The length depends on the size of the mould. After exiting the extruder 6, the temperature of the mixture and the block 8 are controlled within a certain range until they are transferred to a compression molding machine 9 (transfer temperature).
After reaching the compression moulding press 9, one of the blocks 8 is transferred into the mould of the compression moulding press 9, as indicated by the dashed arrow 10. Such transfer may be achieved by, for example, a transfer robot.
The temperature of the die of the compression molding machine 9 is also kept at a predetermined temperature (tool temperature).
After transfer into the mould, the mould halves are closed, as indicated by arrow 11. After closure and opening of the mold halves, the battery case member 1 is removed from the mold, as indicated by arrow 12. Such transfer may be effected in any suitable way, for example by means of the same or another transfer robot as before.
Using the process described with reference to fig. 1, the following compositions were tested:
TABLE 1
Examples Reference example
Amorphous polyamide in weight percent 20 0
Polyamide 6, in% by weight 35 45
Glass fibers in weight percent 45 55
Amorphous polyamide has material grade a1315 and is obtained from beijing energy (china). The amorphous polyamide is made from 70/30 wt% hexamethylenediamine isophthalic acid/hexamethylenediamine terephthalic acid.
Polyamide 6 has a material grade BN0FBK-S03Y and is obtained from Nanjing Polyron (China).
The polyamide 6 composition comprises
The glass fiber has a material grade ECT4301R-2400 and is available from CPIC (China). The glass fiber has a diameter of 17 μm and a circular cross section.
To perform the process described with respect to fig. 1, the following process conditions were determined and used:
TABLE 2
Example 1 Reference example
Extrusion temperature in °c 235-240 280-295
Transfer temperature in °c 240 300
Tool temperature in °c 90-95 90-95
As can be seen from table 2, the battery case member of the present disclosure has a lower heating temperature during extrusion and during the conveyor belt portion, as compared to the reference example without amorphous polyamide.
Next, the tensile strength, flexural strength, tensile modulus, and flexural modulus of the battery case members of examples and reference examples were measured (under dry conditions):
TABLE 3 Table 3
Example 1 Reference example
Tensile strength, MPa 112 105
Flexural Strength, MPa 179 173
Tensile modulus, MPa 9796 9045
Flexural modulus, MPa 8558 7921
As can be seen from table 3, the battery case member of the present disclosure exhibited higher strength and rigidity as compared to the reference example without amorphous polyamide.
Next, the flatness of the battery case member 1 was measured. Briefly, flatness was measured as illustrated in fig. 2.
Fig. 2 shows a cross section of the battery case member 1. The curvature of the battery case member is illustrated in an exaggerated manner to better illustrate the measurement method.
One end of the scale 13 having a length L (for example, 30 cm) is aligned with the flat area of the battery case member 1 with its long side. Since the planar area of the battery case member 1 is not perfectly flat, such alignment is possible only for one end of the scale (near the first end of the value 0). The minimum distance between the second end of the scale (at 30cm value) and the surface of the planar area of the battery case member 1 was then measured.
Flatness was measured as d in mm at the 30cm mark of the scale.
The following results were obtained:
TABLE 4 Table 4
Example 1 Reference example
Flatness, mm 3.75 6.65
It can be seen from table 4 that the flatness of the battery case member having 20% amorphous polyamide was significantly improved from a value of 6.65mm to a value of 3.75mm.
The above described experiment was repeated with the following composition, which differed from the composition of example 1 only in the amount of amorphous polyamide and the incorporation of mica powder:
TABLE 5
Example 2 Reference example
Amorphous polyamide in weight percent 10 0
Mica powder, 80 mesh, in weight percent 10 0
Polyamide 6, in% by weight 35 45
Glass fibers in weight percent 45 55
The same tests as described above were performed on the composition of example 2. The battery case member obtained from the composition of example 2 exhibited the same advantageous properties as the composition of example 1 in terms of heating temperature, tensile strength and flexural strength and flatness during extrusion and during the conveyor belt portion (data not shown).
List of reference numerals
1. Battery case member
2. Feeder
3 (First) extruder
4. Glass fiber
5. Glass fiber roving
6 (Second) extruder
7 Conveyor belt
8 (Extrusion) block
9 Compression moulding press
Dashed arrow indicating transfer to compression molding machine 10
11 Direction of applied pressure
Dashed arrow indicating transfer from compression molding machine 12
Length of L-scale
D distance from one end of the scale to the surface of the battery case member

Claims (15)

1. A battery case component comprising a composite material, characterized in that the composite material comprises:
polymer composition comprising polyamide 6 and an amorphous polyamide, and
-A fibrous material.
2. The battery housing component of claim 1, wherein the composite comprises 5-50 wt%, 10-45 wt%, 10-35 wt%, 15-35 wt%, or 15-25 wt% amorphous polyamide.
3. The battery case component according to claim 1, characterized in that the composite material comprises 5-15 wt.% of mica powder and 5-40 wt.%, 10-35 wt.%, 10-25 wt.%, 5-25 wt.%, or 5-15 wt.% of amorphous polyamide.
4. The battery housing part according to any of the preceding claims, characterized in that the polymer composition comprises 10-70 wt%, 55-60 wt%, 20-50 wt%, 25-45 wt%, or 30-40 wt% polyamide 6.
5. The battery housing component according to any of the preceding claims, characterized in that the composite material comprises 15-80 wt%, 20-75 wt%, 25-70 wt%, 40-60 wt%, 35-55 wt%, or 40-50 wt% fibrous material.
6. The battery housing component according to any of the preceding claims, characterized in that the fibrous material has a diameter of 5-25 microns, 8-23 microns, 10-23 microns, 12-21 microns, 14-19 microns, or 16-18 microns.
7. The battery housing component according to any of the preceding claims, characterized in that the composite material further comprises an antioxidant, a lubricant and/or a release agent.
8. The battery housing component according to any of the preceding claims, characterized in that the fibrous material is embedded in the polymer composition.
9. A molded battery case component made from the battery case component according to any of the preceding claims, wherein the molded battery case component is obtainable from the battery case component by compression molding or injection molding.
10. Battery case for a traction battery, wherein the battery case has at least one battery case part according to any one of claims 1 to 8 or at least one molded battery case part according to claim 9.
11. A traction battery for a motor vehicle, wherein the traction battery has the battery housing of claim 10, wherein at least one battery assembly is contained within the interior of the battery housing.
12. A method for producing a battery can component by means of an extrusion tool, having the following method steps:
mixing and melting polyamide 6 and amorphous polyamide to provide a melt;
-mixing the melt with a fibrous material in an extrusion tool to provide a mixture;
-extruding the mixture at a temperature lower than 280 ℃.
13. The method according to claim 12, characterized in that the mixture is extruded at a temperature below 270 ℃, 260 ℃, 250 ℃ or 245 ℃.
14. The method according to claim 12 or 13, characterized in that the method further comprises:
-cutting the extruded mixture into pieces having a predetermined weight;
-transferring at least one of the blocks to a moulding press at a temperature of 200 ℃ to 300 ℃;
-placing the at least one block into the molding press;
-compression moulding the at least one block in the moulding press.
15. The method according to claim 14, characterized in that the mixture is transferred at a temperature of 210 ℃ to 280 ℃, 215 ℃ to 270 ℃, 220 ℃ to 260 ℃, or 235 ℃ to 245 ℃.
CN202410948881.3A 2024-07-16 2024-07-16 Battery casing components, battery casing, traction battery, and methods for manufacturing battery casing components. Pending CN121355485A (en)

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US20100249292A1 (en) * 2009-03-30 2010-09-30 E. I. Du Pont De Nemours And Company Flame resistant semicaromatic polyamide resin composition and articles therefrom
KR101293917B1 (en) * 2011-09-07 2013-08-08 현대자동차주식회사 Strain Relief of Plastic Battery Pack Case for Electric Vehicle
KR101315741B1 (en) * 2012-03-23 2013-10-10 현대자동차주식회사 Battery Pack Case Assembly for Electric Vehicles Using Plastic Composite and method for manufacturing the same
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