CN115207576A - Manufacturing method of power battery connecting sheet and power battery module connecting method - Google Patents
Manufacturing method of power battery connecting sheet and power battery module connecting method Download PDFInfo
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- CN115207576A CN115207576A CN202210596820.6A CN202210596820A CN115207576A CN 115207576 A CN115207576 A CN 115207576A CN 202210596820 A CN202210596820 A CN 202210596820A CN 115207576 A CN115207576 A CN 115207576A
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- power battery
- connecting sheet
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- film layer
- copper
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 61
- 238000005240 physical vapour deposition Methods 0.000 claims abstract description 25
- 239000000956 alloy Substances 0.000 claims abstract description 23
- 239000007888 film coating Substances 0.000 claims abstract description 8
- 238000009501 film coating Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 111
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 84
- 229910052802 copper Inorganic materials 0.000 claims description 84
- 239000010949 copper Substances 0.000 claims description 84
- 229910052751 metal Inorganic materials 0.000 claims description 50
- 239000002184 metal Substances 0.000 claims description 50
- 238000005260 corrosion Methods 0.000 claims description 42
- 229910052782 aluminium Inorganic materials 0.000 claims description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 38
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 239000013077 target material Substances 0.000 claims description 7
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 6
- QRRWWGNBSQSBAM-UHFFFAOYSA-N alumane;chromium Chemical compound [AlH3].[Cr] QRRWWGNBSQSBAM-UHFFFAOYSA-N 0.000 claims description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 6
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 6
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical compound [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006056 electrooxidation reaction Methods 0.000 description 4
- 238000009713 electroplating Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000006223 plastic coating Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
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Images
Classifications
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
- C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/522—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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered structure
-
- 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a manufacturing method of a power battery connecting sheet and a power battery module connecting method, which comprise the following steps: manufacturing the connecting sheet body into a preset shape; cleaning the connecting sheet body to remove surface dirt; performing local film coating on one end or two ends of the connecting sheet body by adopting physical vapor deposition to form a connecting sheet anticorrosive film layer; the connecting sheet anticorrosive film layer is made of alloy material; and forming an insulating protection layer in the middle of the connecting sheet body. According to the invention, the surface of the connecting sheet body is coated by adopting a physical vapor deposition mode, and the obtained anticorrosive film layer has the advantages of high density, low cost, high batch level and the like, so that the connection reliability of the connecting sheet of the power battery can be greatly improved, and the material cost can be reduced.
Description
Technical Field
The invention belongs to the technical field of power battery connecting sheets, and relates to a manufacturing method of a power battery connecting sheet and a power battery module connecting method.
Background
The new energy power supply is generally formed by connecting a plurality of power battery modules in series and parallel, the reliability of a connecting sheet between the battery modules directly influences the reliability of a battery product, the mechanical connection of copper, aluminum and other dissimilar metals often exists in the connection between the battery modules, the copper and the aluminum which are connected through the mechanical connection are not combined tightly, a plurality of small gaps exist, and the contact interface corrosion of the connecting sheet and an electrode is caused due to the fact that the redox potentials of the dissimilar metals are different and a micro-battery effect is easily formed. Because corrosion products are often larger and more fluffy than original aluminum and become new electrolyte after being wetted, corrosion can be accelerated, and the corrosion products can be inserted into the position where copper and aluminum can be directly combined originally along with expansion caused by heat and contraction caused by cold, so that contact resistance is increased, and the service life and endurance of the battery are adversely affected; simultaneously, because the electrode of power battery connection piece and power battery module adopts and does not use the metal to make, both have different resistance difference, cause the joule heat effect at the contact surface when connection piece and electrode connection circular telegram, produce a large amount of heats on the contact surface, still can cause major safety problems such as burning of catching fire because calorific capacity is too big under the severe condition. Since copper is oxidized, there is a problem that a dissimilar metal is corroded after oxidation in mechanical connection of copper and copper. In the prior art, a plating layer is formed on a contact part of the connecting sheet and the electrode by adopting electroplated nickel to prevent corrosion, but the compactness of the plating layer formed by electroplating is low, so that the plating layer is thick, and the resistance of the plating layer is high.
Disclosure of Invention
In view of the above, the present invention provides a method for manufacturing a power battery connecting sheet and a method for connecting a power battery module.
In order to achieve the purpose, the invention provides the following technical scheme:
a manufacturing method of a power battery connecting sheet comprises the following steps:
s101, manufacturing a connecting piece body into a preset shape;
s102, cleaning the connecting piece body to remove surface dirt;
s103, performing local film coating on one end or two ends of the connecting sheet body by adopting physical vapor deposition to form a connecting sheet anticorrosive film layer; the connecting sheet anticorrosive film layer is made of alloy material;
and S104, forming an insulating protection layer in the middle of the connecting sheet body.
Further, when one end of the connecting sheet body is subjected to local film coating, the connecting sheet body is made of a metal aluminum material; or the composite material with one end needing film coating being made of metal aluminum material and the other end being made of metal copper material.
Furthermore, when local coating is carried out at the two ends of the connecting piece body, the connecting piece body is made of a metal copper material.
Further, magnetron sputtering is adopted to carry out local coating on one end of the connecting sheet body; the magnetron sputtering gas is high-purity argon, the sputtering pressure is 0.5-1.0 Pa, and the power is 20-100W.
Furthermore, the target material for magnetron sputtering is chromium-aluminum alloy, silicon-aluminum alloy, chromium-nickel alloy or copper-silver alloy.
Furthermore, the thickness of the connecting sheet anticorrosive film layer is 0.3-2 μm.
Further, the insulating protective layer is a heat shrinkable tube, a spray coating or a plastic coating.
A power battery module connecting method is used for connecting a copper electrode power battery module and an aluminum electrode power battery module and comprises the following steps:
s701, manufacturing a power battery connecting sheet by adopting a metal aluminum material, wherein one end of the power battery connecting sheet is locally provided with a connecting sheet anticorrosive film layer made of an alloy material through physical vapor deposition;
s702, forming an electrode anti-corrosion film layer on a contact part of an electrode of the copper electrode power battery module and a power battery connecting sheet through physical vapor deposition; the electrode anticorrosive film layer and the connecting sheet anticorrosive film layer are made of the same material;
s703, connecting one end of the power battery connecting sheet, which is provided with the connecting sheet anticorrosive film layer, with an electrode of the copper electrode power battery module, and mechanically connecting the connecting sheet anticorrosive film layer of the power battery connecting sheet with the electrode anticorrosive film layer of the electrode of the copper electrode power battery module; and mechanically connecting the other end of the power battery connecting sheet with an electrode of the aluminum electrode power battery module.
A power battery module connecting method is used for connecting a copper electrode power battery module and an aluminum electrode power battery module, and comprises the following steps:
s801, manufacturing a power battery connecting sheet by adopting a composite material with one end made of a metal aluminum material and the other end made of a metal copper material, wherein one end of the metal copper material of the power battery connecting sheet is locally formed with a connecting sheet anti-corrosion film layer made of an alloy material through physical vapor deposition;
s802, forming an electrode anti-corrosion film layer on a contact part of an electrode of the copper electrode power battery module and a power battery connecting sheet through physical vapor deposition; the electrode anti-corrosion film layer and the connecting sheet anti-corrosion film layer are made of the same material;
s803, connecting one end of the metal copper material of the power battery connecting sheet with an electrode of a copper electrode power battery module, and mechanically connecting the connecting sheet anticorrosive film layer of the power battery connecting sheet with the electrode anticorrosive film layer of the electrode of the copper electrode power battery module; and mechanically connecting one end of the power battery connecting sheet metal aluminum material with an electrode of the aluminum electrode power battery module.
A power battery module connecting method is used for connecting two copper electrode power battery modules and comprises the following steps:
s901, manufacturing a power battery connecting piece by adopting a metal copper material, wherein two ends of the power battery connecting piece are respectively subjected to physical vapor deposition to form a connecting piece anticorrosive film layer made of an alloy material locally;
s902, respectively forming an electrode anti-corrosion film layer on the contact part of the electrodes of the two copper electrode power battery modules and the power battery connecting sheet through physical vapor deposition; the electrode anti-corrosion film layer and the connecting sheet anti-corrosion film layer are made of the same material;
s903, connecting two ends of the power battery connecting sheet with electrodes of two copper electrode power battery modules respectively, and enabling the connecting sheet anticorrosion film layer of the power battery connecting sheet and the electrodes of the copper electrode power battery modules to be anticorrosion
According to the invention, the alloy material is coated on the surface of the connecting piece body by adopting a magnetron sputtering coating process to form the connecting piece anticorrosive film layer, compared with the connecting piece anticorrosive film layer formed by adopting the traditional electroplating process, the obtained anticorrosive film layer has high compactness, the thickness of the anticorrosive film layer can be reduced under the condition of unchanged anticorrosive protection effect, the magnetron sputtering thickness only needs 0.3-2 mu m, and the cost can be effectively reduced; the magnetron sputtering process can enable the substrate to be in closer contact with the coating, the adhesion of the anti-corrosion film layer is strong, and the service life and the wear resistance of the product can be improved; in addition, the anti-corrosion film layer adopts an alloy target material, so that the material cost can be reduced, and the electrochemical corrosion resistance of the material can be improved; meanwhile, an anti-corrosion film layer made of the same material is formed at the joint of the power battery connecting sheet and the electrode of the power battery module, so that the problem that the heat is too large due to the joule heating effect generated when the power battery connecting sheet made of different metals and the electrode of the power battery module are electrified is effectively solved.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a flow chart of a preferred embodiment of the manufacturing method of the power battery connecting piece of the invention.
Fig. 2 is a structural schematic diagram of a power battery connecting sheet.
Fig. 3 is a flowchart illustrating a method for connecting a power battery module according to a preferred embodiment of the present invention.
Fig. 4 is a schematic diagram of a power battery module with copper electrodes and a power battery module with aluminum electrodes connected by power battery connecting sheets.
Fig. 5 is a flowchart illustrating a method for connecting a power battery module according to another preferred embodiment of the present invention.
Fig. 6 is a flowchart illustrating a method for connecting a power battery module according to another preferred embodiment of the present invention.
Fig. 7 is a schematic diagram of a power battery module with two copper electrodes connected by a power battery connecting piece.
In the figure: 1. the connecting piece comprises a connecting piece body, 2 a connecting piece anticorrosive film layer, 3 an insulating protective layer, 4 a connecting hole, 5 a connecting bolt, 11 a power battery module copper electrode, 12 an electrode anticorrosive film layer and 21 a power battery module aluminum electrode.
Detailed Description
The embodiments of the invention are explained below by means of specific examples, the illustrations provided in the following examples merely illustrate the basic idea of the invention in a schematic manner, and the features in the following examples and examples can be combined with one another without conflict.
As shown in fig. 1, a preferred embodiment of the manufacturing method of the power battery connecting sheet of the invention comprises the following steps:
s101, manufacturing the connecting piece body 1 into a preset shape by adopting the processes of stamping, bending and the like. For example: according to the assembly demand of power battery module, connection piece body 1 can adopt the different modes of buckling to make into shape such as vertical bar, L shape, V-arrangement or Z shape, has generally seted up connecting hole 4 at connection piece body 1's both ends to be convenient for the electrode connection of power battery connection piece and power battery module. For a power battery connecting sheet for connecting a copper electrode power battery module and an aluminum electrode power battery module, the connecting sheet body 1 can be made of a metal aluminum material; of course, a composite material in which one end of the connecting sheet body 1 made of the metal copper material is connected with the copper electrode power battery module and the other end of the connecting sheet body made of the metal copper material is connected with the copper electrode power battery module can be adopted. For the power battery connecting piece for connecting the two copper electrode power battery modules, the connecting piece body 1 can be made of a metal copper material.
S102, cleaning the connecting sheet body 1 to remove surface dirt so as to facilitate coating on the surface of the connecting sheet body 1. The present embodiment preferably cleans the connector piece body 1 with a hydrocarbon cleaning agent.
S103, carrying out local film coating on one end or two ends of the connecting piece body 1 by adopting physical vapor deposition to form a connecting piece anticorrosive film layer 2, wherein the connecting piece anticorrosive film layer 2 is made of alloy material. When the connecting sheet body 1 is made of aluminum, one end of the connecting sheet body 1, which is used for connecting the copper electrode power battery module, can be coated with a film locally. When the connecting sheet body 1 is made of a composite material with one end made of a metal aluminum material and the other end made of a metal copper material, one end of the copper material of the connecting sheet body 1 can be locally coated with a film. When the connecting sheet body 1 is made of a metal copper material, local film coating can be performed on both ends of the connecting sheet body 1.
Compared with the connecting sheet anticorrosive film layer 2 formed by adopting the traditional electroplating process, the connecting sheet anticorrosive film layer 2 formed by coating the alloy material on the surface of the connecting sheet body 1 by adopting the magnetron sputtering coating process scheme has high compactness, can reduce the thickness of the connecting sheet anticorrosive film layer 2 under the condition of unchanged anticorrosive protection effect, and can further improve the electrochemical corrosion resistance of the connecting sheet anticorrosive film layer 2 compared with the single metal material such as a pure nickel layer by adopting the alloy target material for the connecting sheet anticorrosive film layer 2. The thickness of the connecting sheet anticorrosive film layer 2 formed by common nickel electroplating is 3-25 μm, and the thickness of the connecting sheet anticorrosive film layer 2 formed by magnetron sputtering can be very thin and generally only needs 0.3-2 μm; for example, the thickness of the connecting sheet anticorrosive film layer 2 may be 0.5 μm, 0.8 μm or 1.5 μm according to the product requirement; thereby reducing the resistance of the connecting sheet anticorrosive film layer 2 and effectively reducing the cost of raw materials. In addition, the connecting sheet anticorrosive film layer 2 formed by magnetron sputtering has strong adhesive force, so that the base material of the connecting sheet body 1 can be in closer contact with the connecting sheet anticorrosive film layer 2, and the service life and the wear resistance of the power battery connecting sheet are improved.
In this embodiment, it is preferable to perform local coating on one end of the connection sheet body 1 by magnetron sputtering using a continuous magnetron sputtering apparatus. The target material for magnetron sputtering is preferably an alloy target material such as chromium-aluminum alloy, silicon-aluminum alloy, chromium-nickel alloy or copper-silver alloy. The gas used for magnetron sputtering is preferably high-purity argon, the sputtering pressure is preferably 0.5 to 1.0Pa, and the power is preferably 20 to 100W.
And S104, forming an insulating protection layer 3 in the middle of the connecting piece body 1 to finish the manufacturing of the power battery connecting piece. The insulating protective layer 3 can be a heat shrinkable tube, a spray coating or a plastic coating. The material of the insulating protective layer 3 can be high polymer insulating material such as PVC, PP, PE or epoxy resin. As shown in fig. 2, it is a schematic structural diagram of a power battery connecting sheet with one end partially coated with a film.
In the embodiment, the connecting sheet anticorrosive film layer 2 is formed on the surface of the connecting sheet body 1 by adopting physical vapor deposition, the compactness of the film layer is high, and the thickness of the connecting sheet anticorrosive film layer 2 can be reduced under the condition that the anticorrosive protection effect is not changed; by adopting the alloy target material, the electrochemical corrosion resistance of the connecting sheet anticorrosive film layer 2 can be further improved compared with a single-component metal material, so that the thickness of the connecting sheet anticorrosive film layer 2 can be very thin, the resistance of the film layer is reduced, and the cost of raw materials can be effectively reduced. In addition, the connecting sheet anticorrosive film layer 2 formed by physical vapor deposition has stronger adhesive force, and the service life and the wear resistance of the power battery connecting sheet can be improved.
The invention also discloses a power battery module connecting method, as shown in fig. 3, a preferred embodiment of the power battery module connecting method of the invention is used for connecting a copper electrode power battery module and an aluminum electrode power battery module, and the embodiment comprises the following steps:
s701, manufacturing a power battery connecting sheet by using a metal aluminum material, preferably arranging connecting holes 4 at two ends of a connecting sheet body 1 so as to facilitate the connection of the power battery connecting sheet and an electrode of a power battery module. One end of the power battery connecting sheet is locally provided with a connecting sheet anticorrosive film layer 2 made of alloy material through physical vapor deposition. The connecting sheet anticorrosive film layer 2 can be made of alloy materials such as chromium-aluminum alloy, silicon-aluminum alloy, chromium-nickel alloy or copper-silver alloy, and the thickness of the connecting sheet anticorrosive film layer 2 is 0.3-2 mu m.
S702, forming an electrode anti-corrosion film layer 12 on a contact part of a copper electrode power battery module electrode 11 and a power battery connecting sheet through physical vapor deposition; the electrode anti-corrosion film layer 12 and the connecting sheet anti-corrosion film layer 2 are made of the same material, so that when the power battery connecting sheet is connected with the copper electrode power battery module electrode 11, the contact surfaces are made of the same material.
And S703, as shown in figure 4, connecting and fixing one end of the power battery connecting piece, which is provided with the connecting piece anticorrosive film layer 2, with the copper electrode power battery module electrode 11 through a bolt 5, and mechanically connecting the connecting piece anticorrosive film layer 2 of the power battery connecting piece with the electrode anticorrosive film layer 12 of the copper electrode power battery module electrode 11. Because the contact surfaces of the power battery connecting sheet and the copper electrode power battery module electrode 11 are all anti-corrosion film layers made of the same material, the problem that the contact interface is corroded due to the microcell effect caused by the potential difference between dissimilar metals is solved. In addition, the anti-corrosion film layer is made of alloy materials, so that the salt mist corrosion resistance is better. Connecting and fixing the other end of the power battery connecting sheet with an aluminum electrode power battery module electrode 21 through a bolt 5; because the contact surface of the power battery connecting sheet and the aluminum electrode power battery module electrode 21 is made of metal aluminum materials, and the aluminum materials are not easy to oxidize, the problem that the contact interface is corroded due to the microcell effect caused by the potential difference between dissimilar metals is solved.
As shown in fig. 5, another preferred embodiment of the power battery module connection method of the present invention comprises the following steps:
s801, manufacturing a power battery connecting sheet by adopting a composite material with one end made of a metal aluminum material and the other end made of a metal copper material, wherein one end of the metal copper material of the power battery connecting sheet is locally formed into a connecting sheet anti-corrosion film layer 2 made of an alloy material through physical vapor deposition. The connecting sheet anticorrosive film layer 2 can be made of alloy materials such as chromium-aluminum alloy, silicon-aluminum alloy, chromium-nickel alloy or copper-silver alloy, and the thickness of the connecting sheet anticorrosive film layer 2 is 0.3-2 mu m.
S802, forming an electrode anti-corrosion film layer 12 on a contact part of a copper electrode power battery module electrode 11 and a power battery connecting sheet through physical vapor deposition; the electrode anticorrosive film layer 12 and the connecting sheet anticorrosive film layer 2 are made of the same material.
And S803, connecting and fixing one end of the metal copper material of the power battery connecting sheet with the electrode 11 of the copper electrode power battery module through a bolt 5, and mechanically connecting the connecting sheet anticorrosive film layer 2 of the power battery connecting sheet with the electrode anticorrosive film layer 12 of the electrode 11 of the copper electrode power battery module. Because copper is oxidized, when the metal copper materials are mechanically connected, the contact surface is connected by copper and copper oxide due to the oxidation of copper for a long time, and the corrosion problem caused by the potential difference of dissimilar metals also exists. And after the connecting sheet anti-corrosion film layer 2 is formed on the connecting sheet of the power battery, and the electrode anti-corrosion film layer 12 is formed on the electrode 11 of the copper electrode power battery module, the contact surfaces of the connecting sheet of the power battery and the electrode 11 of the copper electrode power battery module are all anti-corrosion film layers made of the same material, so that the problems can be avoided. Connecting and fixing one end of a power battery connecting sheet metal aluminum material with an aluminum electrode power battery module electrode 21 through a bolt 5; because the contact surfaces are all made of metal aluminum materials which are not easy to oxidize, the problem that the contact interface is corroded due to the microcell effect caused by the difference of the potentials of different metals can be solved.
As shown in fig. 6, another preferred embodiment of the power battery module connection method of the present invention is used for connecting two copper electrode power battery modules, and the embodiment includes the following steps:
s901, manufacturing a power battery connecting piece by adopting a metal copper material, wherein two ends of the power battery connecting piece are respectively formed with a connecting piece anticorrosive film layer 2 made of an alloy material locally through physical vapor deposition. The connecting sheet anticorrosive film layer 2 can be made of alloy materials such as chromium-aluminum alloy, silicon-aluminum alloy, chromium-nickel alloy or copper-silver alloy, and the thickness of the connecting sheet anticorrosive film layer 2 is 0.3-2 mu m.
S902, forming an electrode anti-corrosion film layer 12 on the contact part of two copper electrode power battery module electrodes 11 and a power battery connecting sheet respectively through physical vapor deposition; the electrode anti-corrosion film layer 12 and the connecting sheet anti-corrosion film layer 2 are made of the same material.
And S903, as shown in FIG. 7, connecting and fixing two ends of the power battery connecting sheet with two copper electrode power battery module electrodes 11 through bolts 5 respectively, and mechanically connecting the connecting sheet anticorrosive film layer 2 of the power battery connecting sheet with the electrode anticorrosive film layer 12 of the copper electrode power battery module electrodes 11. Thereby avoiding the situation that the contact surface is connected with the oxide of copper after the oxidation of the metal copper material, and avoiding the corrosion problem caused by the potential difference of dissimilar metals.
In this embodiment, form the anticorrosive rete of connection piece 2 respectively through the both ends at the power battery connection piece of connecting copper electrode power battery module, form the electrode anticorrosive rete 12 the same with the material of the anticorrosive rete of connection piece 2 at copper electrode power battery module electrode 11, can avoid the electrochemical corrosion problem that the oxidation of copper leads to, make and connect safe and reliable more.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A manufacturing method of a power battery connecting sheet is characterized by comprising the following steps:
s101, manufacturing a connecting piece body into a preset shape;
s102, cleaning the connecting piece body to remove surface dirt;
s103, performing local film coating on one end or two ends of the connecting sheet body by adopting physical vapor deposition to form a connecting sheet anticorrosive film layer; the connecting sheet anticorrosive film layer is made of alloy material;
and S104, forming an insulating protection layer in the middle of the connecting sheet body.
2. The manufacturing method of the power battery connecting piece according to claim 1, characterized in that: when one end of the connecting sheet body is subjected to local coating, the connecting sheet body is made of a metal aluminum material; or the composite material with one end needing film coating being made of metal aluminum material and the other end being made of metal copper material.
3. The manufacturing method of the power battery connecting piece according to claim 1, characterized in that: when local coating is carried out at the both ends of connection piece body, the material that connection piece body adopted is metal copper product.
4. The manufacturing method of the power battery connecting piece according to claim 1, characterized in that: performing local coating on one end of the connecting sheet body by adopting magnetron sputtering; the magnetron sputtering gas is high-purity argon, the sputtering pressure is 0.5-1.0 Pa, and the power is 20-100W.
5. The manufacturing method of the power battery connecting piece according to claim 4, characterized in that: the target material for magnetron sputtering is chromium-aluminum alloy, silicon-aluminum alloy, chromium-nickel alloy or copper-silver alloy.
6. The manufacturing method of the power battery connecting piece according to any one of claims 1 to 5, characterized by comprising the following steps of: the thickness of the connecting sheet anticorrosive film layer is 0.3-2 μm.
7. The manufacturing method of the power battery connecting piece according to any one of claims 1 to 5, characterized in that: the insulation protective layer is a heat shrinkable tube, a spray coating or a plastic dipping layer.
8. A power battery module connecting method is used for connecting a copper electrode power battery module and an aluminum electrode power battery module, and is characterized by comprising the following steps:
s701, manufacturing a power battery connecting sheet by adopting a metal aluminum material, wherein one end of the power battery connecting sheet is locally provided with a connecting sheet anticorrosive film layer made of an alloy material through physical vapor deposition;
s702, forming an electrode anti-corrosion film layer on a contact part of an electrode of the copper electrode power battery module and a power battery connecting sheet through physical vapor deposition; the electrode anti-corrosion film layer and the connecting sheet anti-corrosion film layer are made of the same material;
s703, connecting one end of the power battery connecting sheet, which is provided with the connecting sheet anticorrosive film layer, with an electrode of the copper electrode power battery module, and mechanically connecting the connecting sheet anticorrosive film layer of the power battery connecting sheet with the electrode anticorrosive film layer of the electrode of the copper electrode power battery module; and mechanically connecting the other end of the power battery connecting sheet with an electrode of the aluminum electrode power battery module.
9. A power battery module connecting method is used for connecting a copper electrode power battery module and an aluminum electrode power battery module, and is characterized by comprising the following steps:
s801, manufacturing a power battery connecting sheet by adopting a composite material with one end made of a metal aluminum material and the other end made of a metal copper material, wherein one end of the metal copper material of the power battery connecting sheet is locally formed with a connecting sheet anti-corrosion film layer made of an alloy material through physical vapor deposition;
s802, forming an electrode anti-corrosion film layer on a contact part of an electrode of the copper electrode power battery module and a power battery connecting sheet through physical vapor deposition; the electrode anti-corrosion film layer and the connecting sheet anti-corrosion film layer are made of the same material;
s803, connecting one end of the power battery connecting sheet metal copper material with an electrode of a copper electrode power battery module, and mechanically connecting the connecting sheet anticorrosive film layer of the power battery connecting sheet with the electrode anticorrosive film layer of the electrode of the copper electrode power battery module; and mechanically connecting one end of the power battery connecting sheet metal aluminum material with an electrode of the aluminum electrode power battery module.
10. A power battery module connecting method is used for connecting two copper electrode power battery modules and is characterized by comprising the following steps:
s901, manufacturing a power battery connecting piece by adopting a metal copper material, wherein two ends of the power battery connecting piece are respectively subjected to physical vapor deposition to form a connecting piece anticorrosive film layer made of an alloy material locally;
s902, respectively forming an electrode anti-corrosion film layer on the contact part of the electrodes of the two copper electrode power battery modules and the power battery connecting sheet through physical vapor deposition; the electrode anti-corrosion film layer and the connecting sheet anti-corrosion film layer are made of the same material;
and S903, respectively connecting two ends of the power battery connecting sheet with electrodes of the two copper electrode power battery modules, and mechanically connecting the connecting sheet anticorrosive film layer of the power battery connecting sheet with the electrode anticorrosive film layer of the electrodes of the copper electrode power battery modules.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596820.6A CN115207576A (en) | 2022-05-30 | 2022-05-30 | Manufacturing method of power battery connecting sheet and power battery module connecting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210596820.6A CN115207576A (en) | 2022-05-30 | 2022-05-30 | Manufacturing method of power battery connecting sheet and power battery module connecting method |
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| CN115207576A true CN115207576A (en) | 2022-10-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102487590A (en) * | 2010-12-02 | 2012-06-06 | 鸿富锦精密工业（深圳）有限公司 | Housing and method for manufacturing the same |
| CN204230337U (en) * | 2014-09-29 | 2015-03-25 | 上海比亚迪有限公司 | A kind of cell connector and use the electrokinetic cell bag of this cell connector |
| JP2015069953A (en) * | 2013-10-01 | 2015-04-13 | 株式会社オートネットワーク技術研究所 | Electrical connection structure and wiring module using the same |
| US20180287316A1 (en) * | 2017-03-30 | 2018-10-04 | Ford Global Technologies, Llc | Electrical interconnects for battery cells |
| CN110729445A (en) * | 2018-07-16 | 2020-01-24 | 深圳先进技术研究院 | Tab with coating, preparation method thereof, battery cell, battery and electric tool |
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2022
- 2022-05-30 CN CN202210596820.6A patent/CN115207576A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102487590A (en) * | 2010-12-02 | 2012-06-06 | 鸿富锦精密工业（深圳）有限公司 | Housing and method for manufacturing the same |
| JP2015069953A (en) * | 2013-10-01 | 2015-04-13 | 株式会社オートネットワーク技術研究所 | Electrical connection structure and wiring module using the same |
| CN204230337U (en) * | 2014-09-29 | 2015-03-25 | 上海比亚迪有限公司 | A kind of cell connector and use the electrokinetic cell bag of this cell connector |
| US20180287316A1 (en) * | 2017-03-30 | 2018-10-04 | Ford Global Technologies, Llc | Electrical interconnects for battery cells |
| CN110729445A (en) * | 2018-07-16 | 2020-01-24 | 深圳先进技术研究院 | Tab with coating, preparation method thereof, battery cell, battery and electric tool |
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