CN114899537A - 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
- CN114899537A CN114899537A CN202210633502.2A CN202210633502A CN114899537A CN 114899537 A CN114899537 A CN 114899537A CN 202210633502 A CN202210633502 A CN 202210633502A CN 114899537 A CN114899537 A CN 114899537A
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- Prior art keywords
- plastic film
- aluminum
- soft package
- notch
- 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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Links
- 239000002985 plastic film Substances 0.000 title claims abstract description 38
- 229920006255 plastic film Polymers 0.000 title claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000012528 membrane Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims 1
- 230000037303 wrinkles Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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
- H01M50/10—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
-
- 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
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- 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 invention relates to a heat sealing method for an aluminum plastic film of a soft package lithium battery and a structure of the soft package lithium battery. The method mainly comprises the steps of arranging a battery cell in an aluminum-plastic film, forming a notch on the edge of the aluminum-plastic film on the side corresponding to a lug of the battery cell, then carrying out heat sealing on the edge of the aluminum-plastic film on the side corresponding to the lug of the battery cell, and covering the notch in a heat-sealing area. The method can effectively inhibit the occurrence of wrinkles, and the heat-sealing area of the aluminum plastic film after heat sealing is relatively flat.
Description
Technical Field
The invention 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 soft package lithium cell, after the plastic-aluminum membrane dashes the hole, because the tensile force leads to heat-seal position unevenness, produce the fold easily after the heat-seal. The conventional measures for reducing the occurrence of wrinkles are complicated, resulting in high production costs.
Disclosure of Invention
Based on the method, the soft package lithium battery aluminum plastic film heat sealing method is provided. The method is simple and effective, and has low production cost.
A heat sealing method of an aluminum plastic film of a soft package lithium battery,
arranging the battery cell in the aluminum plastic film, forming a notch on the edge of the aluminum plastic film on the side corresponding to the lug of the battery cell, then carrying out heat sealing on the edge of the aluminum plastic film on the side corresponding to the lug of the battery cell, and covering the notch in a heat sealing area.
This application is through seting up an incision at the edge of plastic-aluminum membrane earlier, like this, when carrying out the heat-seal to the edge of plastic-aluminum membrane, deformation stress can be released by this incision, and then can effectively restrain the heat-seal region fold that appears, makes the heat-seal region of plastic-aluminum membrane more level and more smooth.
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 forms an angle of 5 to 80 degrees with the first side, and the first side is located between the battery cell and the second side.
In one embodiment, the first side has a length of 3-20 mm.
In one embodiment, the distance from one side of the notch close to the outer edge of the cell is 0-60 mm.
The utility model provides a soft packet of lithium cell structure, is including arranging the electric core in the plastic-aluminum membrane in, is provided with a incision that is located the heat-seal region at the edge of the plastic-aluminum membrane of the utmost point ear corresponding one side of electric core.
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 forms an angle of 5 to 80 degrees with the first side, and the first side is located between the battery cell and the second side.
In one embodiment, the first side has a length of 3-20 mm.
In one embodiment, the distance from one side of the notch close to the outer edge of the cell is 0-60 mm.
Drawings
Fig. 1 is a schematic view of an aluminum plastic film provided with a notch and not heat-sealed according to an embodiment of the present application.
Fig. 2 is a schematic view of an aluminum plastic film provided with a notch and subjected to heat sealing according to an embodiment of the present application.
Fig. 3 is a schematic diagram illustrating a distance between a triangular notch and a cell according to an embodiment of the present application.
Fig. 4 is a schematic illustration of the dimensions of a triangular cutout of an embodiment of the present application.
Wherein:
100. an aluminum plastic film, 200, a battery core, 101, an edge, 102, a notch,
102a, a first side, 102b, a second side.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured 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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 and fig. 2, an embodiment of the present application provides a method for heat sealing an aluminum plastic film of a soft package lithium battery, which includes: the battery cell 200 is placed 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, the edge 101 of the aluminum plastic film 100 on the side corresponding to the tab of the battery cell 200 is heat-sealed, and the heat-sealed area covers the notch 102.
In one embodiment, the cutout 102 is triangular in shape. Through comparative experiments, the shape of the notch 102 is triangular, and the wrinkle inhibition effect is more obvious compared with the notches 102 in 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 aluminum-plastic film 100, the second side 102b forms an included angle b of 5 to 80 degrees with the first side 102a, and the first side 102a is located between the battery cell 200 and the second side 102 b. Through comparison experiments, the triangular cuts 102 in the shape are found to have a more obvious wrinkle inhibition effect than other triangular cuts 102. I.e. the heat-sealed area after heat-sealing is more even.
It is understood that the angle b between the second side 102b and the first side 102a may be specifically 5 degrees to 20 degrees, 20 degrees to 50 degrees, 50 degrees to 80 degrees, and so on.
In one embodiment, the present application further performs a comparison experiment on the above parameters, and the length of first side 102a is also found to have an effect on wrinkle suppression. Preferably, the length L1 of the first side 102a is 3-20mm, so that the restraining effect of the incision 102 on the wrinkles is very obvious.
It is understood that the length L1 of the first side 102a may be 3-10mm,10-20mm, etc.
In one embodiment, on the basis of the above, it is found through comparative experiments that the distance L2 from the outer edge of the battery cell 200 to the side of the notch 102 close to the outer edge of the battery cell 200 also has an effect on the wrinkle suppression effect, and the distance L2 is reasonably in the range of 0-60 mm. The optimum range of L2 is 1-20mm, and within this range, the wrinkle suppressing effect is optimum. For example, if the cutout includes the first side 102a described above, the distance L2 from the first side 102a to the outer edge of the battery cell 200 may be 0-60 mm.
The most preferred embodiment is as follows:
the notch 102 has a first side 102a and a second side 102b, the first side 102a is perpendicular to the edge of the aluminum-plastic film 100, the second side 102b forms an included angle b of 20 degrees to 50 degrees with the first side 102a, and the first side 102a is located between the battery cell 200 and the second side 102 b. The length L1 of the first side 102a is 3-10 mm. The distance L2 from the outer edge of the battery cell 200 to one side of the notch 102 close to the outer edge of the battery cell 200 is 1-20 mm.
Through comparative experiments, the above embodiment is the most preferable embodiment, and the heat-sealed area of the aluminum plastic film 100 after heat sealing is the flattest.
The embodiment of the application further provides a soft package lithium battery structure, which comprises a battery cell 200 arranged in the aluminum plastic film 100, wherein a notch 102 located in a heat sealing area is arranged at the edge of the aluminum plastic film 100 on the side corresponding to the tab of the battery cell 200.
In one embodiment, the cutout 102 is triangular in shape. Other shapes are possible, such as trapezoidal, 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 aluminum-plastic film 100, and the second side 102b forms an angle of 5 to 80 degrees with the first side 102 a.
In one embodiment, the second side 102b is angled 35.54 degrees from the first side 102 a. The length L1 of the first side 102a is 3-20 mm.
In one embodiment, on the basis of the above, it is found through comparative experiments that the distance from the side of the notch 102 close to the outer edge of the battery cell 200 also has an effect on the wrinkle suppression effect, and the distance may be 0-60 mm.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A heat sealing method for an aluminum plastic film of a soft package lithium battery is characterized in that,
arranging the battery cell in the aluminum plastic film, forming a notch on the edge of the aluminum plastic film on the side corresponding to the lug of the battery cell, then carrying out heat sealing on the edge of the aluminum plastic film on the side corresponding to the lug of the battery cell, and covering the notch in a heat sealing area.
2. The heat-sealing method for the aluminum plastic film of the soft package lithium battery as claimed in claim 1, wherein the shape of the notch is triangular.
3. The heat-sealing method for the aluminum-plastic film of the soft package lithium battery as claimed in claim 2, wherein 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 forms an angle of 5 to 80 degrees with the first side, and the first side is located between the battery cell and the second side.
4. The heat-sealing method for the aluminum plastic film of the soft package lithium battery as claimed in claim 3, wherein the length of the first side is 3-20 mm.
5. The heat-sealing method for the aluminum plastic film of the soft package lithium battery as claimed in claim 1, wherein the distance from the side of the notch close to the outer edge of the battery cell is 0-60 mm.
6. The utility model provides a soft packet of lithium cell structure which characterized in that, is including arranging the electric core in the plastic-aluminum membrane in, is provided with a incision that is located the heat-seal region at the edge of the plastic-aluminum membrane of the utmost point ear corresponding one side of electric core.
7. The lithium pouch cell construction of claim 6 wherein the cutout shape is triangular.
8. The lithium pouch cell structure of claim 7, wherein 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 forms an angle of 5 to 80 degrees with the first side, and the first side is located between the cell core and the second side.
9. The soft-packed lithium battery structure of claim 8, wherein the first side has a length of 3-20 mm.
10. The lithium pouch battery structure as claimed in claim 9, wherein the side of the notch close to the outer edge of the battery cell is 0-60mm away from the outer edge of the battery cell.
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 true CN114899537A (en) | 2022-08-12 |
| CN114899537B CN114899537B (en) | 2023-09-01 |
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| 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 |
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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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| CN114899537B (en) | 2023-09-01 |
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