CN116694133A - Lithium battery shell complex and surface roller coating process - Google Patents

Lithium battery shell complex and surface roller coating process Download PDF

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Publication number
CN116694133A
CN116694133A CN202310990229.3A CN202310990229A CN116694133A CN 116694133 A CN116694133 A CN 116694133A CN 202310990229 A CN202310990229 A CN 202310990229A CN 116694133 A CN116694133 A CN 116694133A
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CN
China
Prior art keywords
lithium battery
battery shell
shell
rotary table
baking
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Pending
Application number
CN202310990229.3A
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Chinese (zh)
Inventor
孙炳贵
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Kangxinda Technology Suzhou Co ltd
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Kangxinda Technology Suzhou Co ltd
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Priority to CN202310990229.3A priority Critical patent/CN116694133A/en
Publication of CN116694133A publication Critical patent/CN116694133A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • H01M50/1245—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure characterised by the external coating on the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2502/00—Acrylic polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2503/00—Polyurethanes
    • 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

Abstract

In order to solve the problem of unreliable adhesion between an insulating film and a lithium battery shell in the prior art, the application discloses a lithium battery shell complex and a surface roller coating process, which comprises a lithium battery shell and an insulating layer formed on the surface of the lithium battery shell by roller coating insulating ink, wherein the insulating ink consists of aqueous polyurethane resin, aqueous acrylic resin, alcohol ether solvent, water, filling material, pigment, dispersing agent and leveling agent, and the weight percentages of the aqueous polyurethane resin, the aqueous acrylic resin, the alcohol ether solvent, the water, the filling material, the pigment, the dispersing agent and the leveling agent are 25-40%, 5-10%, 3-5%, 20-25%, 10-30%, 5-10%, 0.5-1% and 2-3%, respectively. According to the application, the insulating ink is coated on the surface of the lithium battery shell in a roller coating manner to form the insulating layer, so that compared with the method in the prior art that the insulating film is directly coated on the surface of the lithium battery shell, the adhesive force is better, and the use cost of materials is reduced.

Description

Lithium battery shell complex and surface roller coating process
Technical Field
The application relates to the technical field of lithium battery production, in particular to a lithium battery shell complex and a surface roller coating process.
Background
The lithium battery for the vehicle is a power battery of a hybrid electric vehicle and an electric vehicle, and has the advantages of high energy density, large capacity, no memory and the like.
With the rapid development of the rapid charging technology of the power battery, the requirements on the performances such as insulation, voltage resistance and the like of the lithium battery shell in the power battery are higher, the outer surface of the lithium battery shell in the prior art is coated with an insulation film after the battery core is welded, and the insulation film and the lithium battery shell are unreliable in adhesion due to the insulation treatment of the lithium battery in the mode, so that the produced lithium battery shell is not good in insulation, voltage resistance, wear resistance and corrosion resistance.
In order to solve the problems, the application discloses a lithium battery shell composite and a surface roller coating process.
Disclosure of Invention
In order to overcome the defects of the prior art, the application discloses a lithium battery shell complex and a surface roller coating process.
In order to achieve the above purpose, the present application is realized by the following technical scheme: the lithium battery shell composite comprises a lithium battery shell and an insulating layer formed on the surface of the lithium battery shell by roller coating insulating ink, wherein the insulating ink consists of aqueous polyurethane resin, aqueous acrylic resin, alcohol ether solvent, water, filler, pigment, dispersing agent and flatting agent, and the weight percentages of the aqueous polyurethane resin, the aqueous acrylic resin, the alcohol ether solvent, the water, the filler, the pigment, the dispersing agent and the flatting agent are 25-40%, 5-10%, 3-5%, 20-25%, 10-30%, 5-10%, 0.5-1% and 2-3% respectively.
As a preferred embodiment of the present application, the lithium battery case is a circular lithium battery case.
A surface roller coating process of a lithium battery shell at least comprises the following steps:
(1) The lithium battery shell is placed on a feeding assembly line by a feeding mechanical arm, and is moved to a side pushing mechanical arm by the feeding assembly line;
(2) The side pushing mechanical arm pushes the lithium battery shell side to be placed into the turntable carrier;
(3) The turntable carrier carries the lithium battery shell to pass through a plasma dust removing area to clean and remove dust on the surface of the lithium battery shell;
(4) The rotary table carrier rotates to a first printing place with the lithium battery shell, and insulating ink is transferred to the surface of the lithium battery shell when a roller of the first automatic roll coater contacts with the lithium battery shell;
(5) The rotary table carrier carries the lithium battery shell to pass through a first baking area, and performs first surface drying on the surface of the rotary table carrier;
(6) The rotary table carrier is rotated to a second printing position with the lithium battery shell, and insulating ink is transferred to the surface of the lithium battery shell when a roller of the second automatic roll coater is contacted with the lithium battery shell;
(7) The rotary table carrier carries the lithium battery shell to pass through a second baking area, and the surface of the rotary table carrier is subjected to secondary surface drying;
(8) The rotary table carrier is rotated to a third printing position with the lithium battery shell, and insulating ink is transferred to the surface of the lithium battery shell when a roller of a third automatic roll coater is contacted with the lithium battery shell;
(9) The rotary table carrier carries the lithium battery shell to pass through a third baking area, and the surface of the rotary table carrier is subjected to third surface drying;
(10) The rotary table carrier carries the lithium battery shell, and the lithium battery shell is conveyed to the assembly line carrier by the vacuum material taking manipulator;
(11) Conveying the lithium battery shell into an oven by the assembly line carrier for tightly baking;
(12) After the lithium battery shell is tightly baked, the assembly line carrier brings the lithium battery shell out of the oven, and the discharging manipulator takes out the lithium battery shell for inspection and packaging.
As a preferable mode of the application, the thickness of the insulating ink transferred to the surface of the lithium battery shell in the steps (4), (6) and (8) is 30-40 mu m.
As a preferable mode of the application, the thickness of the insulating ink transferred to the surface of the lithium battery case in the steps (4), (6) and (8) is 35 μm.
As a preferred mode of the present application, the baking temperature of the lithium battery case by the first baking zone, the second baking zone and the third baking zone is 350-450 ℃.
As a preferred mode of the present application, the baking temperature of the lithium battery case by the first baking zone, the second baking zone and the third baking zone is 400 ℃.
As a preferred mode of the present application, the baking temperature in the oven is 200 °, and the lithium battery case is baked in the oven for 30 minutes.
As a preferred mode of the present application, the lithium battery case may be rotated in the turntable carrier when the rollers of the first, second and third automatic roller coaters contact the lithium battery case.
The application has the following beneficial effects:
according to the application, the insulating ink is coated on the surface of the lithium battery shell in a roller coating manner to form the insulating layer, so that compared with the prior art that the insulating film is directly coated on the surface of the lithium battery shell, the insulating layer has better adhesive force, greatly improved insulativity, pressure resistance, wear resistance and corrosion resistance, can meet the long-term work under the high-temperature and high-humidity environment, reduces the material investment of enterprises, and has high use value.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic view of a lithium battery case according to the present disclosure;
fig. 2 is a schematic view of equipment used in the surface roll coating process disclosed in the present application.
In the figure: 10. a feeding assembly line; 20. a plasma dust removal area; 30. a first automatic roll coater; 40. a first baking zone; 50. a second automatic roll coater; 60. a second baking zone; 70. a third automatic roll coater; 80. a third baking zone; 90. a vacuum material taking manipulator; 100. a pipeline carrier; 110. an oven; 120. a turntable carrier; 130. a lithium battery case; 140. an insulating layer.
Description of the embodiments
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
Referring to fig. 1, a lithium battery case complex includes a lithium battery case 130 and an insulating layer 140 formed on the surface of the lithium battery case 130 by roll coating an insulating ink composed of aqueous polyurethane resin, aqueous acrylic resin, alcohol ether solvent, water, filler, pigment, dispersant and leveling agent, wherein the weight percentages of the aqueous polyurethane resin, the aqueous acrylic resin, the alcohol ether solvent, the water, the filler, the pigment, the dispersant and the leveling agent are 25 to 40%, 5 to 10%, 3 to 5%, 20 to 25%, 10 to 30%, 5 to 10%, 0.5 to 1% and 2 to 3%, respectively.
Based on the above components, the following description of physical properties is made:
the water-based polyurethane resin is provided by a Cork polymer (China) limited company, the brand of the water-based polyurethane resin is ZC6074, the chemical substance accession number of the water-based polyurethane resin is 51852-81-4, and the water-based polyurethane resin has the main functions of no pollution, safety, reliability, excellent mechanical property, good compatibility, easy modification and the like, and when the water-based polyurethane resin exceeds 40%, the prepared insulating ink is easy to crack; the water-based acrylic resin is provided by a Cork polymer (China) limited company, the brand number is ZC6058, the chemical substance accession number is 25767-39-9, the main function is chemical resistance, when the chemical resistance is lower than 5%, the prepared insulating ink can show black spots on the surface of an electrolyte test, an alcohol ether solvent can be directly obtained in the market (Shandong Aite New Material limited company can be improved), the chemical substance accession number is 111-96-6, the main function is that the insulating ink has good fluidity, and when the chemical resistance is lower than 3%, pinholes, orange peel, brush marks, fish eyes, shrinkage holes and the like can appear in the prepared insulating ink; water is directly available in the market, and the main purpose is to dilute the insulating ink, and when the water content is higher than 25%, the prepared insulating ink can cause uneven printing effect due to too thin ink; the filler is provided by DuPont company in U.S., and is talcum powder with the brand number of 3068; the main function is to improve pigment, when the pigment content is higher than 30%, the prepared insulating ink can generate peeling and cracking; pigment is provided by Yan Tai, the chemical substance accession number of which is 81-77-6, and the main function is color attribute; the dispersing agent is provided by Shanghai color titanium industry Co., ltd, has a chemical substance accession number of 36290-04-7, and has the main function of increasing color saturation and hiding power below or above which color difference can occur; leveling agent is provided by Kogyo Polymer (China) Co., ltd, has chemical substance accession number of 67762-85-0, and has the main function of reducing surface tension, and bubbles appear in the prepared insulating ink when the surface tension is higher than 30%.
In one preparation method, 33% of aqueous polyurethane resin, 7% of aqueous acrylic resin, 3.5% of alcohol ether solvent, 22.3% of water, 24% of filler, 7% of pigment, 0.7% of dispersing agent and 2.5% of flatting agent are mixed according to the weight percentage to obtain the insulating ink with better performance.
According to design requirements, referring to fig. 1, the lithium battery case 130 is a circular lithium battery case 130, and when the lithium battery case 130 is in other shapes, insulating ink can be coated on the outer surface of the lithium battery case 130, and the roll coating process of the surface of the lithium battery case is the same as the surface roll coating process of the present application.
In order to ensure that the insulating ink is automatically rolled on the lithium battery shell 130, referring to fig. 2, the application provides a surface rolling process of the lithium battery shell 130, which at least comprises the following steps:
(1) A loading manipulator (not shown) places the lithium battery shell 130 on the loading assembly line 10, and the lithium battery shell is moved to a side pushing manipulator (not shown) by the loading assembly line 10;
(2) The side pushing mechanical arm pushes the lithium battery shell 130 side to be placed into the turntable carrier 120 carrier;
(3) The turntable carrier 120 carries the lithium battery case 130 to pass through the plasma dust removal area 20 to clean and remove dust on the surface of the lithium battery case 130;
(4) The rotary table carrier 120 rotates to a first printing place with the lithium battery shell 130, and insulating ink is transferred to the surface of the lithium battery shell 130 when the roller of the first automatic roller coater 30 contacts with the lithium battery shell 130; the thickness of the insulating ink transferred to the surface of the lithium battery case 130 at this time is 30-40 μm;
(5) The turntable carrier 120 carries the lithium battery case 130 to pass through the first baking area 40, and performs first surface drying on the surface of the lithium battery case; the baking temperature of the baking area is 350-450 ℃;
(6) The rotary table carrier 120 carries the lithium battery shell 130 to a second printing position, and insulating ink is transferred to the surface of the lithium battery shell 130 when the roller of the second automatic roll coater 50 is contacted with the lithium battery shell 130; the thickness of the insulating ink transferred to the surface of the lithium battery case 130 at this time is 30-40 μm;
(7) The turntable carrier 120 carries the lithium battery case 130 to pass through the second baking area 60, and performs second surface drying on the surface of the lithium battery case; the baking temperature of the baking area is 350-450 ℃;
(8) The rotary table carrier 120 rotates to a third printing place with the lithium battery shell 130, and when the roller of the third automatic roll coater 70 contacts with the lithium battery shell 130, insulating ink is transferred to the surface of the lithium battery shell 130; the thickness of the insulating ink transferred to the surface of the lithium battery case 130 at this time is 30-40 μm;
(9) The turntable carrier 120 carries the lithium battery case 130 to pass through the third baking area 80, and performs third surface drying on the surface of the lithium battery case; the baking temperature of the baking area is 350-450 ℃;
(10) The turntable carrier 120 carries the lithium battery case 130 through the vacuum material taking manipulator 90, and the vacuum material taking manipulator 90 transfers the lithium battery case 130 to the assembly line carrier 100;
(11) The assembly line carrier 100 conveys the lithium battery case 130 into the oven 110 for tightly baking; the baking temperature in the oven 110 is 200 °, and the lithium battery case 130 is baked in the oven 110 for 30 minutes;
(12) After the lithium battery shell is tightly baked, the assembly line carrier brings the lithium battery shell out of the oven 130, and a blanking manipulator (not shown in the figure) takes out the lithium battery shell 130 from the inspection package.
As one of the preferred embodiments, the thickness of the insulating ink transferred to the surface of the lithium battery case 130 in the steps (4), (6) and (8) is 35 μm, and it is shown that the thickness of the insulating ink transferred to the surface of the lithium battery for the first, second and third times is optimal to 35 μm in repeated tests.
As one of the preferred embodiments, the baking temperatures of the first, second and third baking regions 40, 60 and 80 for the lithium battery case are 400 c, and it has been shown in repeated tests that the first, second and third baking regions 40, 60 and 80 are optimally baked at 400 c.
In specific use, when the rollers of the first, second, and third automatic roll coaters 30, 50, and 70 contact the lithium battery case 130, the lithium battery case 130 may spin in the turntable vehicle 120, and the rollers of the first, second, or third automatic roll coaters 30, 50, or 70 transfer the insulating ink around the lithium battery case 130 during the rotation of the lithium battery case 130.
According to the technical scheme, the performance test is carried out on the insulating layer formed after the roller coating of the surface of the lithium battery shell, and the result is as follows:
1. detecting the thickness of the insulating layer 140 of the lithium battery shell 130 by a thick film instrument, wherein the film thickness tolerance is 30 mu m;
2. the flexibility of the insulating layer 140 of the lithium battery shell 130 is detected through the round bar, and the insulating layer 140 is repeatedly bent for 180 degrees after being peeled off from the lithium battery shell 130, so that no crack appears;
3. the flame retardance of the insulating layer 140 of the lithium battery shell 130 is detected through the alcohol lamp, so that the flame retardance UL-94V0 is met;
4. the test person did not find the insulating layer 140 of the lithium battery case 130 to have a sensitive smell;
5. the adhesion force of the insulating layer 140 of the lithium battery shell 130 is detected by a pulling machine, and no falling-off condition is found;
6. the insulation layer 140 of the lithium battery shell 130 is subjected to resistance test through a resistance meter, the insulation withstand voltage is more than or equal to 5000V DC, and 60S leakage current is less than 0.1mA;
7. welding and detecting the insulating layer 140 of the lithium battery shell 130 through a hot air gun, and directly blowing at 700 ℃ by a hot air machine, wherein the welding temperature is within 700 ℃;
8. the corrosion resistance of the insulating layer 140 of the lithium battery shell 130 is detected through the lithium iron phosphate electrolyte, the 1000ppm lithium iron phosphate electrolyte covers the paint surface, 48H is remained under the environment of high temperature of 55 ℃, and no corrosion such as delamination, foaming and the like are found;
9. the hardness of the insulating layer 140 of the lithium battery case 130 is detected by a hardness machine, a pencil with the hardness of more than 2 hours is used for cutting a lead core of 3mm, the pencil is inclined by 45 degrees and is pushed at the speed of 3mm per second, and no deformation is found;
10. the cleaning test is performed on the insulating layer 140 of the lithium battery case 130, and no breakage is found when the water jet is washed;
11. performing high-low temperature test on the insulating layer 140 of the lithium battery case 130 through a temperature impact experiment box, maintaining the temperature at the low temperature of-140+/-2 ℃ for 1h, switching the temperature to the high temperature environment of 80+/-2 ℃ within 1min, maintaining the insulating layer for 1h, and maintaining the insulating layer as is after 24 cycles;
12. the insulating layer 140 of the lithium battery case 130 was subjected to a water boiling test, and was put into hot water of 100 ℃ for 2 hours without bubbles and falling off;
13. the insulating layer 140 of the lithium battery case 130 was subjected to an acid resistance stability test, and was immersed in a 5% acetic acid solution at 20 ℃ for 48 hours without falling off;
14. the insulating layer 140 of the lithium battery case 130 was subjected to alkali resistance stability test, and was immersed in a 5% sodium hydroxide solution at 20 ℃ for 48 hours without falling off;
15. the insulation layer 140 of the lithium battery case 130 was subjected to an abrasion resistance test by an abrasion resistance tester, a load of 175g was applied to the paper tape and the paper tape was driven to rub against the sample surface for 200 cycles, and the paint was not penetrating through the bottom.
The foregoing embodiments are merely illustrative of the technical concept and features of the present application, and are intended to enable those skilled in the art to understand the present application and to implement the same according to the present application, not to limit the scope of the present application. All changes and modifications that come within the meaning and range of equivalency of the application are to be embraced within their scope.

Claims (9)

1. The lithium battery shell composite is characterized by comprising a lithium battery shell and an insulating layer formed on the surface of the lithium battery shell by roller coating insulating ink, wherein the insulating ink consists of aqueous polyurethane resin, aqueous acrylic resin, alcohol ether solvent, water, filler, pigment, dispersing agent and leveling agent, and the weight percentages of the aqueous polyurethane resin, the aqueous acrylic resin, the alcohol ether solvent, the water, the filler, the pigment, the dispersing agent and the leveling agent are 25-40%, 5-10%, 3-5%, 20-25%, 10-30%, 5-10%, 0.5-1% and 2-3%, respectively.
2. The lithium battery case composite of claim 1, wherein the lithium battery case is a round lithium battery case.
3. The process for roll coating the surface of a lithium battery shell according to any one of claims 1 to 2, comprising at least the following steps:
(1) The lithium battery shell is placed on a feeding assembly line by a feeding mechanical arm, and is moved to a side pushing mechanical arm by the feeding assembly line;
(2) The side pushing mechanical arm pushes the lithium battery shell side to be placed into the turntable carrier;
(3) The turntable carrier carries the lithium battery shell to pass through a plasma dust removing area to clean and remove dust on the surface of the lithium battery shell;
(4) The rotary table carrier rotates to a first printing place with the lithium battery shell, and insulating ink is transferred to the surface of the lithium battery shell when a roller of the first automatic roll coater contacts with the lithium battery shell;
(5) The rotary table carrier carries the lithium battery shell to pass through a first baking area, and performs first surface drying on the surface of the rotary table carrier;
(6) The rotary table carrier is rotated to a second printing position with the lithium battery shell, and insulating ink is transferred to the surface of the lithium battery shell when a roller of the second automatic roll coater is contacted with the lithium battery shell;
(7) The rotary table carrier carries the lithium battery shell to pass through a second baking area, and the surface of the rotary table carrier is subjected to secondary surface drying;
(8) The rotary table carrier is rotated to a third printing position with the lithium battery shell, and insulating ink is transferred to the surface of the lithium battery shell when a roller of a third automatic roll coater is contacted with the lithium battery shell;
(9) The rotary table carrier carries the lithium battery shell to pass through a third baking area, and the surface of the rotary table carrier is subjected to third surface drying;
(10) The rotary table carrier carries the lithium battery shell, and the lithium battery shell is conveyed to the assembly line carrier by the vacuum material taking manipulator;
(11) Conveying the lithium battery shell into an oven by the assembly line carrier for tightly baking;
(12) After the lithium battery shell is tightly baked, the assembly line carrier brings the lithium battery shell out of the oven, and the discharging manipulator takes out the lithium battery shell for inspection and packaging.
4. The process for roll coating the surface of the lithium battery case according to claim 3, wherein the thickness of the insulating ink transferred to the surface of the lithium battery case in the steps (4), (6) and (8) is 30-40 μm.
5. The process for roll coating the surface of a lithium battery case according to claim 4, wherein the thickness of the insulating ink transferred to the surface of the lithium battery case in the steps (4), (6) and (8) is 35 μm.
6. The process of roll coating a surface of a lithium battery case according to claim 3, wherein the baking temperature of the lithium battery case by the first, second and third baking regions is 350-450 ℃.
7. The process of roll coating a surface of a lithium battery can according to claim 6, wherein the baking temperature of the lithium battery can by the first baking zone, the second baking zone and the third baking zone is 400 ℃.
8. The process of claim 3, wherein the baking temperature in the oven is 200 ℃ and the lithium battery case is baked in the oven for 30 minutes.
9. The process of claim 3, wherein the lithium battery can spin in the turntable carrier when the rollers of the first, second, and third automatic roller coaters contact the lithium battery can.
CN202310990229.3A 2023-08-08 2023-08-08 Lithium battery shell complex and surface roller coating process Pending CN116694133A (en)

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Application Number Priority Date Filing Date Title
CN202310990229.3A CN116694133A (en) 2023-08-08 2023-08-08 Lithium battery shell complex and surface roller coating process

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Application Number Priority Date Filing Date Title
CN202310990229.3A CN116694133A (en) 2023-08-08 2023-08-08 Lithium battery shell complex and surface roller coating process

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CN116694133A true CN116694133A (en) 2023-09-05

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CN103084306A (en) * 2013-01-28 2013-05-08 中银（宁波）电池有限公司 Battery steel shell inner wall graphite spraying equipment
WO2014023541A1 (en) * 2012-08-06 2014-02-13 Robert Bosch Gmbh Battery with a metallic housing, method for producing a coating for metallic battery housings and motor vehicle
CN108912965A (en) * 2018-07-28 2018-11-30 吴江市贝灵电机有限公司 A kind of water-soluble insulated coating
CN108940749A (en) * 2018-09-21 2018-12-07 无锡牧宇智能科技有限公司 Pipe type element inner wall roller coating equipment and its roll coating process
CN113994529A (en) * 2019-08-12 2022-01-28 宝马股份公司 Housing, battery cell and method for producing a housing for a battery cell
CN219057810U (en) * 2022-12-21 2023-05-23 江苏阳铭互联智能系统有限公司 Steel shell coating equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014023541A1 (en) * 2012-08-06 2014-02-13 Robert Bosch Gmbh Battery with a metallic housing, method for producing a coating for metallic battery housings and motor vehicle
CN103084306A (en) * 2013-01-28 2013-05-08 中银（宁波）电池有限公司 Battery steel shell inner wall graphite spraying equipment
CN108912965A (en) * 2018-07-28 2018-11-30 吴江市贝灵电机有限公司 A kind of water-soluble insulated coating
CN108940749A (en) * 2018-09-21 2018-12-07 无锡牧宇智能科技有限公司 Pipe type element inner wall roller coating equipment and its roll coating process
CN113994529A (en) * 2019-08-12 2022-01-28 宝马股份公司 Housing, battery cell and method for producing a housing for a battery cell
CN219057810U (en) * 2022-12-21 2023-05-23 江苏阳铭互联智能系统有限公司 Steel shell coating equipment

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