CN114899537B - Soft package lithium battery aluminum plastic film heat sealing method and soft package lithium battery structure - Google Patents
Soft package lithium battery aluminum plastic film heat sealing method and soft package lithium battery structure Download PDFInfo
- Publication number
- CN114899537B CN114899537B CN202210633502.2A CN202210633502A CN114899537B CN 114899537 B CN114899537 B CN 114899537B CN 202210633502 A CN202210633502 A CN 202210633502A CN 114899537 B CN114899537 B CN 114899537B
- Authority
- CN
- China
- Prior art keywords
- edge
- plastic film
- notch
- aluminum plastic
- lithium battery
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- 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.)
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- 239000002985 plastic film Substances 0.000 title claims abstract description 36
- 229920006255 plastic film Polymers 0.000 title claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 title claims abstract description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000012528 membrane Substances 0.000 claims 3
- 230000037303 wrinkles Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 7
- 230000005764 inhibitory process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application relates to a soft-package lithium battery aluminum plastic film heat sealing method and a soft-package lithium battery structure. The battery cell is arranged in the aluminum plastic film, a notch is formed in the edge of the aluminum plastic film on the side corresponding to the tab of the battery cell, then the edge of the aluminum plastic film on the side corresponding to the tab of the battery cell is heat-sealed, and the heat-sealed area covers the notch. The method can effectively inhibit the occurrence of wrinkles, so that the heat sealing area of the heat-sealed aluminum plastic film is smoother.
Description
Technical Field
The application relates to the field of battery packaging, in particular to a soft package lithium battery aluminum plastic film heat sealing method and a soft package lithium battery structure.
Background
In the production process of the soft package lithium battery, after the aluminum plastic film is punched, the heat sealing position is uneven due to the stretching force, and wrinkles are easily generated after heat sealing. The conventional measures for reducing the occurrence of wrinkles are complicated, resulting in high production cost.
Disclosure of Invention
Based on the heat sealing method, the aluminum plastic film of the soft package lithium battery is provided. The method is simple and effective, and has low production cost.
A heat sealing method for an aluminum plastic film of a soft package lithium battery,
placing the battery cell in the aluminum plastic film, forming a notch at the edge of the aluminum plastic film on the side corresponding to the tab of the battery cell, and then heat-sealing the edge of the aluminum plastic film on the side corresponding to the tab of the battery cell, wherein the heat-sealing area covers the notch.
According to the application, the edge of the aluminum plastic film is provided with the notch, so that deformation stress can be released from the notch when the edge of the aluminum plastic film is subjected to heat sealing, and further, the occurrence of wrinkles in a heat sealing area can be effectively restrained, and the heat sealing area of the aluminum plastic film is smoother.
In one embodiment, the cutout is triangular in shape.
In one embodiment, the notch has a first side and a second side, the first side is perpendicular to the edge of the aluminum plastic film, the second side has an included angle of 5 to 80 degrees with the first side, and the first side is located between the cell and the second side.
In one embodiment, the first edge has a length of 3-20mm.
In one embodiment, the side of the notch near the outer edge of the cell is 0-60mm away from the outer edge of the cell.
A soft package lithium battery structure comprises a battery cell arranged in an aluminum plastic film, wherein an incision positioned in a heat sealing area is formed in the edge of the aluminum plastic film at one side of a tab of the battery cell.
In one embodiment, the cutout is triangular in shape.
In one embodiment, the notch has a first side and a second side, the first side is perpendicular to the edge of the aluminum plastic film, the second side has an included angle of 5 to 80 degrees with the first side, and the first side is located between the cell and the second side.
In one embodiment, the first edge has a length of 3-20mm.
In one embodiment, the side of the notch near the outer edge of the cell is 0-60mm away from the outer edge of the cell.
Drawings
Fig. 1 is a schematic view of an aluminum plastic film according to an embodiment of the present application, which is provided with a notch and has not been heat sealed.
Fig. 2 is a schematic diagram of an aluminum plastic film with a notch and heat-sealed according to an embodiment of the application.
Fig. 3 is a schematic diagram of a distance between a triangle-shaped notch and a cell according to an embodiment of the present application.
Fig. 4 is a schematic view of the dimensions of a triangular incision in accordance with an embodiment of the present application.
Wherein:
100. 200 parts of aluminum plastic film, 101 parts of battery cell, edges, 102 parts of incision,
102a, a first side, 102b, a second side.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As shown in fig. 1 and 2, an embodiment of the present application provides a heat sealing method for an aluminum plastic film of a soft package lithium battery, which includes: the battery cell 200 is arranged in the aluminum plastic film 100, and a notch 102 is formed in the edge 101 of the aluminum plastic film 100 on the side corresponding to the tab of the battery cell 200. And then heat-sealing the edge 101 of the aluminum plastic film 100 on the corresponding side of the tab of the battery cell 200, wherein the heat-sealing area covers the notch 102.
In one embodiment, the cutout 102 is triangular in shape. It was found by comparative experiments that the shape of the slit 102 was triangular, and the inhibition effect on wrinkles was more remarkable, compared with the slit 102 of other shapes.
In one embodiment, the notch 102 has a first side 102a and a second side 102b, the first side 102a is perpendicular to the edge of the plastic-aluminum film 100, the second side 102b forms an angle b with the first side 102a of 5 to 80 degrees, and the first side 102a is located between the cell 200 and the second side 102 b. According to the application, compared with other triangular incisions 102, the triangular incisions 102 with the shape disclosed by the application have more obvious inhibition effect on wrinkles. I.e. the heat-sealed areas after heat-sealing are flatter.
It is understood that the angle b between the second side 102b and the first side 102a may be between 5 degrees and 20 degrees, between 20 degrees and 50 degrees, between 50 degrees and 80 degrees, etc.
In one embodiment, the present application has also performed a comparison of the above parameters, and the length of the first side 102a has been found to have an effect on the wrinkle suppression. Preferably, the length L1 of the first side 102a is 3-20mm, and such a notch 102 has a significant effect on wrinkle suppression.
It is understood that the length L1 of the first side 102a may be 3-10mm,10-20mm, etc.
In one embodiment, based on the above, it is found through a comparison experiment that a distance L2 from the side of the notch 102 near the outer edge of the cell 200 to the outer edge of the cell 200 also has an effect on the inhibition of wrinkles, and the distance L2 is reasonably in a range of 0-60mm. The optimal range of L2 is 1-20mm, and in this range, the wrinkle suppressing effect is optimal. For example, if the cutout includes the first side 102a described above, the distance L2 of the first side 102a from the outer edge of the cell 200 may be 0-60mm.
Best mode for carrying out the application:
the notch 102 has a first side 102a and a second side 102b, the first side 102a is perpendicular to the edge of the plastic-aluminum film 100, the second side 102b has an included angle b with the first side 102a of 20 degrees to 50 degrees, and the first side 102a is located between the cell 200 and the second side 102 b. The length L1 of the first side 102a is 3-10mm. The distance L2 between the side of the notch 102 near the outer edge of the cell 200 and the outer edge of the cell 200 is 1-20mm.
The above embodiment is found to be the most preferred embodiment by comparison experiments, and the heat-sealed area of the heat-sealed aluminum plastic film 100 is the flattest.
The embodiment of the application also provides a soft package lithium battery structure, which comprises a battery cell 200 arranged in the aluminum plastic film 100, wherein the edge of the aluminum plastic film 100 at one side corresponding to the tab of the battery cell 200 is provided with a notch 102 positioned in a heat sealing area.
In one embodiment, the cutout 102 is triangular in shape. Other shapes are also possible, such as trapezoids, etc.
In one embodiment, the notch 102 has a first side 102a and a second side 102b, the first side 102a is perpendicular to the edge of the plastic-aluminum film 100, and the second side 102b forms an angle with the first side 102a of 5 to 80 degrees.
In one embodiment, the second side 102b is disposed at an angle 35.54 degrees to the first side 102 a. The length L1 of the first side 102a is 3-20mm.
In one embodiment, it is found through comparative experiments that the distance between the side of the notch 102 near the outer edge of the cell 200 and the outer edge of the cell 200 has an effect on the inhibition of wrinkles, and the distance may be 0-60mm.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (2)
1. A heat-sealing method for an aluminum-plastic film of a soft-package lithium battery is characterized in that a battery cell is arranged in the aluminum-plastic film, a notch is formed in the edge of the aluminum-plastic film on the side corresponding to a tab of the battery cell, then the edge of the aluminum-plastic film on the side corresponding to the tab of the battery cell is heat-sealed, and a heat-sealing area covers the notch;
the shape of the notch is triangular, the notch is provided with a first edge and a second edge, the first edge is perpendicular to the edge of the aluminum plastic film, an included angle b between the second edge and the first edge is 20-50 degrees, the first edge is positioned between the battery cell and the second edge, the length L1 of the first edge is 3-10mm, and the distance L2 of one side of the notch, which is close to the outer edge of the battery cell, from the outer edge of the battery cell is 1-20mm.
2. The utility model provides a soft packet of lithium cell structure, its characterized in that, including placing the electric core in the plastic-aluminum membrane, the edge of the plastic-aluminum membrane that corresponds one side at the utmost point ear of electric core is provided with one and is located the incision of heat-seal area, the incision shape is triangle-shaped, the incision has first limit and second limit, first limit is perpendicular with the edge of plastic-aluminum membrane, contained angle b of second limit and first limit is 20 degrees to 50 degrees, first limit is located between electric core and the second limit, the length L1 of first limit is 3-10mm, the distance L2 of the outer fringe of electric core of one side distance electric core that the incision is close to the electric core outer fringe is 1-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210633502.2A CN114899537B (en) | 2022-06-06 | 2022-06-06 | Soft package lithium battery aluminum plastic film heat sealing method and soft package lithium battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210633502.2A CN114899537B (en) | 2022-06-06 | 2022-06-06 | Soft package lithium battery aluminum plastic film heat sealing method and soft package lithium battery structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114899537A CN114899537A (en) | 2022-08-12 |
| CN114899537B true CN114899537B (en) | 2023-09-01 |
Family
ID=82728716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210633502.2A Active CN114899537B (en) | 2022-06-06 | 2022-06-06 | Soft package lithium battery aluminum plastic film heat sealing method and soft package lithium battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114899537B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002319374A (en) * | 2001-04-19 | 2002-10-31 | Yuasa Corp | Sealed battery |
| CN101043071A (en) * | 2007-04-11 | 2007-09-26 | 深圳市邦凯电子有限公司 | Encapsulation method for electric core of flexible packing lithium battery |
| CN201764409U (en) * | 2010-09-03 | 2011-03-16 | 昆山龙腾光电有限公司 | Optical diaphragm and backlight module and liquid crystal display device adopting optical diaphragm |
| CN202462518U (en) * | 2012-01-19 | 2012-10-03 | 万向电动汽车有限公司 | Device for preventing lithium-battery packaging films for deforming due to case punching |
| CN207901308U (en) * | 2018-01-19 | 2018-09-25 | 浙江衡远新能源科技有限公司 | A kind of film punch forming device |
| CN210723262U (en) * | 2019-11-14 | 2020-06-09 | 恒大新能源技术(深圳)有限公司 | Edge-sealing and wrinkle-removing device for soft-package lithium battery |
| CN216085044U (en) * | 2021-09-28 | 2022-03-18 | 浙江锋锂新能源科技有限公司 | Laminate polymer battery with directional pressure release structure |
-
2022
- 2022-06-06 CN CN202210633502.2A patent/CN114899537B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002319374A (en) * | 2001-04-19 | 2002-10-31 | Yuasa Corp | Sealed battery |
| CN101043071A (en) * | 2007-04-11 | 2007-09-26 | 深圳市邦凯电子有限公司 | Encapsulation method for electric core of flexible packing lithium battery |
| CN201764409U (en) * | 2010-09-03 | 2011-03-16 | 昆山龙腾光电有限公司 | Optical diaphragm and backlight module and liquid crystal display device adopting optical diaphragm |
| CN202462518U (en) * | 2012-01-19 | 2012-10-03 | 万向电动汽车有限公司 | Device for preventing lithium-battery packaging films for deforming due to case punching |
| CN207901308U (en) * | 2018-01-19 | 2018-09-25 | 浙江衡远新能源科技有限公司 | A kind of film punch forming device |
| CN210723262U (en) * | 2019-11-14 | 2020-06-09 | 恒大新能源技术(深圳)有限公司 | Edge-sealing and wrinkle-removing device for soft-package lithium battery |
| CN216085044U (en) * | 2021-09-28 | 2022-03-18 | 浙江锋锂新能源科技有限公司 | Laminate polymer battery with directional pressure release structure |
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| Publication number | Publication date |
|---|---|
| CN114899537A (en) | 2022-08-12 |
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