CN114976390A - Battery coating method, battery and battery module - Google Patents
Battery coating method, battery and battery module Download PDFInfo
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- CN114976390A CN114976390A CN202210676245.0A CN202210676245A CN114976390A CN 114976390 A CN114976390 A CN 114976390A CN 202210676245 A CN202210676245 A CN 202210676245A CN 114976390 A CN114976390 A CN 114976390A
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- side wall
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- 238000000576 coating method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims description 24
- 238000005520 cutting process Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 188
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000009413 insulation Methods 0.000 description 8
- 238000005304 joining Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920006280 packaging film Polymers 0.000 description 4
- 239000012785 packaging film Substances 0.000 description 4
- 230000007306 turnover Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000013039 cover film Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 208000029152 Small face Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
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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
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
-
- 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
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
-
- 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)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a battery coating method, a battery and a battery module, wherein the battery comprises a bottom wall, a side wall and a top wall, and the battery coating method comprises the following steps: placing the outer wrapping film below the battery so that the outer wrapping film is attached to the bottom wall; turning over the parts of the outer wrapping film positioned on the two sides of the width direction of the bottom wall upwards; turning the parts of the outer wrapping film positioned at the two sides of the bottom wall in the length direction upwards; after the side walls are attached to the outer wrapping film, the outer wrapping film is provided with four overlapping sections protruding outwards along two sides of the thickness direction of the battery, and the four overlapping sections are cut along the height direction of the battery to form four connecting areas; and turning over the two connecting areas close to the third side wall and attaching the two connecting areas to the third side wall, and turning over the two connecting areas close to the fourth side wall and attaching the two connecting areas to the fourth side wall. Through the technical scheme that this application provided, can solve the battery module among the correlation technique and can't reduce the problem of processing cost when satisfying insulating effect.
Description
Technical Field
The invention relates to the technical field of energy storage devices, in particular to a battery coating method, a battery and a battery module.
Background
The battery module is used as a main power source of the electric vehicle, and is one of the key and indispensable devices of the electric vehicle. The battery module includes a battery, and insulation protection of the battery is an important factor with respect to safety of the battery.
In the related art, the insulation of the battery is mainly achieved by wrapping a layer of blue film, the blue film wraps the bottom of the battery, a small section of blue film is reserved and folded on the side wall of the battery, and the blue film is overlapped on the side wall and then folded on the top cover. In the non-totally-enclosed air-cooled module, water vapor in air is condensed into dew due to high-low temperature circulation in the application working condition of the automobile. Dew can penetrate through the folded gaps of the blue film on the side wall of the battery and contact with the aluminum shell of the battery, so that the external insulation of the battery fails, and the phenomenon is called condensation failure.
In order to prevent dew from entering from the folding angle gap of the blue film, after the blue film is wrapped by the battery, the folding angle and the overlapping part of the blue film on the side wall of the battery are completely covered by spraying a layer of glue. However, the method has high process requirements on glue spraying, and in order to ensure that the assembly of the module is not interfered, the glue not only needs to cover the folding angle of the blue film, but also needs to ensure that the glue cannot overflow the side wall and the bottom surface of the battery too much. Because of the multiple size of needs giving consideration to, the yield of current production line coating glue is lower, and high rework rate has increased the processing cost.
Disclosure of Invention
The invention provides a battery coating method, a battery and a battery module, which are used for solving the problem that the battery module in the related art cannot meet the insulation effect and reduce the processing cost.
According to an aspect of the present invention, there is provided a method of coating a battery, the battery including a bottom wall, side walls, and a top wall, the side walls including first and second side walls oppositely disposed in a width direction of the bottom wall and third and fourth side walls oppositely disposed in a length direction of the bottom wall, the method comprising: placing the outer wrapping film below the battery so that the outer wrapping film is attached to the bottom wall; turning over the parts of the outer wrapping film positioned on the two sides of the bottom wall in the width direction upwards to enable the outer wrapping film to be respectively attached to the first side wall and the second side wall; turning up the parts of the outer wrapping film positioned at the two sides of the bottom wall in the length direction so that the outer wrapping film is respectively attached to the third side wall and the fourth side wall; after the first side wall, the second side wall, the third side wall and the fourth side wall are attached to the outer wrapping film, four overlapping sections protruding outwards along two sides of the thickness direction of the battery are formed on the outer wrapping film, and the four overlapping sections are cut along the height direction of the battery so that four connecting areas are formed on the remaining parts of the four overlapping sections after cutting; and turning over the two connecting areas close to the third side wall and attaching the two connecting areas to the third side wall, and turning over the two connecting areas close to the fourth side wall and attaching the two connecting areas to the fourth side wall.
Further, after the outer wrapping film is completely attached to the side wall, the upper end of the outer wrapping film is located at a part of the battery, which is over one half of the height of the battery.
Further, after the outer envelope is completely attached to the side wall, the upper end of the outer envelope is located at a portion of the battery over one-half height, specifically including: the upper end of the outer wrapping film is folded to be above one half of the height of the battery, and the upper end of the outer wrapping film is positioned below the top wall so as to wrap the outer wrapping film on the side wall and the bottom wall; or the upper end of the outer wrapping film is folded to be above one half of the height of the battery, and the upper end of the outer wrapping film is located on the top wall, so that the outer wrapping film is wrapped on the edge, the side wall and the bottom wall of the top wall.
Further, all turn over two linking areas that will be close to third lateral wall department and turn over to the third lateral wall on and be connected with the laminating of third lateral wall, all turn over two linking areas that will be close to fourth lateral wall department and turn over to the fourth lateral wall on and be connected with the laminating of fourth lateral wall, specifically include: the sum of the widths of the two adjacent connecting areas in the thickness direction of the battery is less than or equal to the thickness of the battery, after the two adjacent connecting areas in the thickness direction of the battery are folded to one of the third side wall and the fourth side wall, the two adjacent connecting areas are arranged at intervals or are abutted, and the two adjacent connecting areas are respectively connected with the parts of the corresponding connecting areas of the outer wrapping film; or the sum of the widths of the two adjacent connecting regions in the thickness direction of the battery is larger than the thickness of the battery, and after the two adjacent connecting regions in the thickness direction of the battery are both folded onto one of the third side wall and the fourth side wall, the two adjacent connecting regions are superposed and connected with the part of the corresponding connecting region of the outer wrapping film.
Further, when the part of the outer wrapping film corresponding to the connecting area is connected with the connecting area, the outer wrapping film is connected in a hot melting mode or in a rubberizing mode.
According to another aspect of the present invention, there is provided a battery including: the lower surface of the shell forms a bottom wall of the battery, the outer side wall of the shell forms a side wall of the battery, and the side wall comprises a first side wall and a second side wall which are oppositely arranged along the width direction of the bottom wall and a third side wall and a fourth side wall which are oppositely arranged along the length direction of the bottom wall; the top cover covers the upper end of the shell, the upper ends of the first side wall, the second side wall, the third side wall and the fourth side wall extend to the top cover, and the upper surface of the top cover forms a top wall of the battery; the outer wrapping film comprises a bottom film area and a side film area, the bottom film area wraps the bottom wall of the battery, the side film area is turned upwards to be turned onto the side wall of the battery, the height of the upper end of the side film area is higher than half of the height of the battery, four overlapping sections are formed after the side film area is turned upwards, the connecting positions of two adjacent outer side walls of the shell are corners of the shell, and the four overlapping sections are located at the four corners of the shell respectively; wherein the side film region comprises a first side film, a second side film, a third side film and a fourth side film, the first side film comprises a first attaching region and a first overlapping region connected with the first attaching region, the second side film comprises a second attaching region and a second overlapping region connected with the second attaching region, the third side film comprises a third attaching region and a third overlapping region connected with the third attaching region, the fourth side film comprises a fourth attaching region and a fourth overlapping region connected with the fourth attaching region, the first attaching region is attached to the first side wall, the second attaching region is attached to the second side wall, the third attaching region is attached to the third side wall, the fourth attaching region is attached to the fourth side wall, the first overlapping region and the fourth overlapping region are overlapped to form a first overlapping section, the fourth overlapping region and the second overlapping region are overlapped to form a second overlapping section, the second overlapping region and the third overlapping section are overlapped to form a third overlapping section, and the third overlapping area and the first overlapping area are overlapped to form a fourth overlapping section, the four overlapping sections are cut along the height direction of the battery so that the remaining parts of the four overlapping sections after cutting form four connecting areas, and the connecting areas are covered on the third attaching area and connected with the third attaching area, or the connecting areas are covered on the fourth attaching area and connected with the fourth attaching area.
Furthermore, the width of the third side wall and the fourth side wall is the thickness of the battery, the ratio of the width of the connecting region to the thickness of the battery is A, wherein A is more than 0 and less than or equal to 0.9.
Further, the upper end of the side film region is higher than one-half of the height of the battery and lower than the top cover.
Further, the distance between the upper end of the side film region and the upper surface of the top cover is between 0mm and 20 mm.
Further, the upper end cover of the side film area is arranged on the upper surface of the top cover.
Furthermore, the top cover is provided with a pole, the distance between the edges of the first side film and the second side film and the pole is 0-50 mm, and the distance between the edges of the third side film and the fourth side film and the pole is 0-80 mm.
Further, the outer envelope is provided with an adhesive, or the outer envelope comprises a heat shrink film.
According to still another aspect of the present invention, there is provided a battery module including the battery provided above.
By applying the technical scheme of the invention, when the battery is coated, the outer wrapping film is placed below the battery, so that the outer wrapping film is attached to the bottom wall of the battery, the parts of the outer wrapping film, which are positioned on two sides of the bottom wall in the width direction, are upwards turned to the upper part of the battery, so that the outer wrapping film is respectively attached to the first side wall and the second side wall, the parts of the outer wrapping film, which are positioned on two sides of the bottom wall in the length direction, are upwards turned to the upper part of the battery, and so that the outer wrapping film is respectively attached to the third side wall and the fourth side wall. After the outer wrapping film is completely attached to the side walls, four overlapped sections protruding outwards along two sides of the thickness direction of the battery are formed on the outer wrapping film, the four overlapped sections are cut along the height direction of the battery to obtain four connecting areas, the two connecting areas close to the third side wall are turned over to the third side wall and attached and connected with the third side wall, and the two connecting areas close to the fourth side wall are turned over to the fourth side wall and attached and connected with the fourth side wall. By adopting the coating method, the outer coating film is firstly coated on the bottom wall of the battery, and then the outer coating film is upwards folded to the upper part of the battery, so that the outer coating film is coated on all the side walls of the battery, the whole side wall from the upper part to the bottom of the battery is completely sealed, water vapor is prevented from entering, and the insulation effect can be met. Moreover, by adopting the coating method, the gluing process can be eliminated, the overall production yield of the battery can be improved, the material can be saved, the manufacturing and reworking cost can be reduced, and the processing cost of the battery can be further reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating an encapsulation method of a battery according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a structure of a battery provided according to an embodiment of the present invention;
FIG. 3 shows a schematic structural view of an outer wrapping film provided according to an embodiment of the present invention placed under a cell;
FIG. 4 shows a schematic structural view of folding up portions of the respective first and second sidewalls of the outer envelope to the upper portion of the cell provided in accordance with an embodiment of the invention;
FIG. 5 shows a schematic structural view of folding up portions of the corresponding third and fourth sidewalls of the outer envelope to the upper portion of the cell provided in accordance with an embodiment of the invention;
FIG. 6 is a schematic structural diagram illustrating a plurality of overlapped segments cut along the up-down direction to obtain a plurality of connected regions according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram illustrating a plurality of overlapped segments cut in the up-down direction to obtain a plurality of connected regions according to an embodiment of the present invention;
FIG. 8 is a schematic view of the construction of the remaining outer envelope (connecting region) folded over the cell sidewall without overlapping/folding over the top cover according to an embodiment of the present invention;
FIG. 9 is a schematic view of the construction of the remaining outer envelope (connecting region) folded over the cell sidewall without overlapping/folding over the top cover according to an embodiment of the present invention;
FIG. 10 is a schematic view of the construction of the remaining outer envelope (connecting region) folded over the cell sidewall without overlapping/folding over the top cover according to an embodiment of the present invention;
FIG. 11 is a schematic view of the construction of the remaining outer envelope (connecting region) folded over the cell sidewall without overlapping/folding over the top cover according to an embodiment of the present invention;
FIG. 12 is a schematic view showing the structure of the remaining outer cover film (connection region) folded over the cell sidewall with/without folding over the top cover according to an embodiment of the present invention;
FIG. 13 is a schematic view of the construction of the remaining outer envelope (connecting region) folded over the cell sidewall overlapping/un-folded over the top cover according to an embodiment of the present invention;
FIG. 14 shows a schematic view of the construction of the remaining outer envelope (connecting region) folded over the cell sidewall overlap/top cover according to an embodiment of the present invention;
fig. 15 shows a schematic structure of the remaining outer envelope (connection region) folded over the cell sidewall overlap/top cover according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a battery; 11. a side wall; 111. a first side wall; 112. a second side wall; 113. a third side wall; 114. a fourth side wall; 12. a top wall; 15. a pole column;
20. wrapping a film; 21. a superposition section; 211. a first overlapping section; 212. a second overlapping section; 213. a third combining section; 214. a fourth overlap section; 22. a connecting region; 23. a lateral membrane region; 231. a first side film; 2311. a first attachment region; 2312. a first overlap region; 233. a third side film; 2331. a third attachment area; 2332. a third overlapping region.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 15, an embodiment of the present invention provides a battery coating method by which a battery is coated. The battery 10 includes a bottom wall, a side wall 11 and a top wall 12, wherein the side wall 11 includes a first side wall 111 and a second side wall 112 oppositely disposed along a width direction of the bottom wall, and a third side wall 113 and a fourth side wall 114 oppositely disposed along a length direction of the bottom wall. Specifically, the battery coating method comprises the following steps:
placing the outer envelope 20 under the cell 10 such that the outer envelope 20 is in abutment with the bottom wall;
the parts of the outer envelope 20 on both sides in the width direction of the bottom wall are folded up to the upper part of the cell 10, so that the outer envelope 20 is respectively attached to the first side wall 111 and the second side wall 112;
the parts of the outer envelope 20 at both sides in the length direction of the bottom wall are folded upwards to the upper part of the cell 10, so that the outer envelope 20 is respectively attached to the third side wall 113 and the fourth side wall 114;
after the first side wall 111, the second side wall 112, the third side wall 113 and the fourth side wall 114 are all attached to the outer wrapping film 20, the outer wrapping film 20 is formed with four overlapping sections 21 protruding outwards along both sides in the thickness direction of the battery 10, and the four overlapping sections 21 are cut along the height direction of the battery 10 so that the four overlapping sections 21 form four connecting regions 22 at the remaining cut parts;
and the two connecting areas 22 close to the third side wall 113 are folded to the third side wall 113 and are attached and connected with the third side wall 113, and the two connecting areas 22 close to the fourth side wall 114 are folded to the fourth side wall 114 and are attached and connected with the fourth side wall 114.
By applying the method for coating the battery provided by the embodiment, the outer coating film 20 is firstly coated on the bottom wall of the battery 10, and then the outer coating film 20 is upwards folded to the upper part of the battery 10, so that the outer coating film 20 is coated on all the side walls of the battery 10, the whole side wall from the upper part to the bottom of the battery 10 is completely sealed, water vapor is prevented from entering, and the insulation effect can be met. Moreover, by adopting the coating method, the gluing process can be eliminated, the overall production yield of the battery can be improved, the material can be saved, the manufacturing and reworking cost can be reduced, and the processing cost of the battery can be further reduced.
Wherein, the forming process of the overlapping section 21 is as follows: when the battery is enveloped by the enveloping method, as shown in fig. 3, the outer film 20 is first placed below the battery 10, as shown in fig. 4, then the portions of the outer film 20 located on both sides in the width direction of the bottom wall are folded upward to the upper portion of the battery 10, and then the portions of the outer film 20 located on both sides in the length direction of the bottom wall are folded upward to the upper portion (not shown) of the battery 10, as shown in fig. 5, after the first side wall 111, the second side wall 112, the third side wall 113, and the fourth side wall 114 are all bonded to the outer film 20, the portions of the outer film 20 not bonded to the battery 10 are folded to form four overlapping sections 21 protruding outward.
Specifically, the outer envelope 20 includes a bottom envelope region and a side envelope region 23, the bottom envelope region is wrapped on the bottom wall of the battery, the side envelope region 23 is turned over upward to the side wall 11 of the battery, the side envelope region 23 forms four overlapping sections 21 after being turned over upward, the connecting portion of two adjacent outer side walls of the case is a corner of the case, and the four overlapping sections 21 are respectively located at four corners of the case. The side film region 23 includes a first side film 231, a second side film, a third side film 233 and a fourth side film, the first side film 231 includes a first attachment region 2311 and a first overlap region 2312 connected with the first attachment region 2311, the second side film includes a second attachment region and a second overlap region connected with the second attachment region, the third side film 233 includes a third attachment region 2331 and a third overlap region 2332 connected with the third attachment region 2331, the fourth side film includes a fourth attachment region and a fourth overlap region connected with the fourth attachment region, the first attachment region 2311 is attached with the first sidewall 111, the second attachment region is attached with the second sidewall 112, the third attachment region 2331 is attached with the third sidewall 113, the fourth attachment region is attached with the fourth sidewall 114, the first overlap region 2312 overlaps with the fourth overlap region to form a first triple overlap section 211, the fourth overlap region overlaps with the third overlap region to form a third overlap section 212, the second overlap region 213 forms a third overlap section 2332, the third overlap region 2332 overlaps the first overlap region 2312 to form the fourth overlapping segment 214.
In this embodiment, the four overlapping sections 21 are cut in the height direction of the battery so that the remaining parts of the four overlapping sections 21 after cutting form four connection regions 22, and the connection regions 22 are covered on the third attachment regions 2331 and connected to the third attachment regions 2331, or the connection regions 22 are covered on the fourth attachment regions and connected to the fourth attachment regions.
In this embodiment, the upper portion of the battery 10 refers to a portion of the battery 10 that is more than one half of the height of the battery 10, and after the outer wrapping film 20 and the side wall 11 are completely attached, the upper end of the outer wrapping film 20 is located on the upper portion of the battery 10, so that the entire side wall from the upper portion to the bottom portion of the battery 10 is completely sealed, water vapor is prevented from entering, and an insulation effect can be satisfied.
In the method for coating the battery, compared with the conventional coating method, a relatively long blue film (outer coating film) is reserved in the coating, and the blue film is folded from the side wall of the battery 10 to the upper part of the battery.
In the present embodiment, the battery 10 is a square-can battery, the first side wall 111 and the second side wall 112 are large faces opposed to two long sides of the square-can battery, and the third side wall 113 and the fourth side wall 114 are small faces opposed to two short sides of the square-can battery.
As shown in fig. 8 to 15, after the outer envelope 20 is completely attached to the side wall 11, the upper end of the outer envelope 20 is located at the upper part of the battery 10, and specifically includes:
first wrapping structure of upper end of outer wrapper 20: the upper end of the outer wrapping film 20 is folded to be above one half of the height of the battery 10, and the upper end of the outer wrapping film 20 is positioned below the top wall 12, so that the outer wrapping film 20 is wrapped on the side wall 11 and the bottom wall; alternatively, the first and second electrodes may be,
second wrapping structure of the upper end of the outer wrapper 20: the upper end of the outer envelope 20 is folded over half the height of the battery 10, and the upper end of the outer envelope 20 is located on the top wall 12, so that the outer envelope 20 is wrapped around the edge of the top wall 12, the side wall 11 and the bottom wall.
When the upper end of the outer wrapping film 20 adopts the first wrapping structure, after the outer wrapping film 20 is folded upwards to the upper part of the battery 10, the upper end of the outer wrapping film 20 is just folded to the upper part of the side wall 11 of the battery 10, so that the outer wrapping film 20 is attached to the side wall 11 conveniently, and the processing is convenient. When the upper end of the outer wrapping film 20 adopts the second wrapping structure, after the outer wrapping film 20 is folded upwards to the upper part of the battery 10, the upper end of the outer wrapping film 20 is just folded to the edge of the top wall 12 of the battery 10, so that the wrapping effect of the outer wrapping film 20 can be improved, and the protection performance of the battery is further improved.
As shown in fig. 8 to 15, folding both the two connection areas 22 near the third sidewall 113 over to the third sidewall 113 and attaching to the third sidewall 113, and folding both the two connection areas 22 near the fourth sidewall 114 over to the fourth sidewall 114 and attaching to the fourth sidewall 114 specifically include:
first attachment of two adjacent attachment zones 22 to the outer wrapper 20: the sum of the widths of the two adjacent connection regions 22 in the thickness direction of the battery 10 is less than or equal to the thickness of the battery 10, after the two adjacent connection regions 22 in the thickness direction of the battery 10 are both folded onto one of the third side wall 113 and the fourth side wall 114, the two adjacent connection regions 22 are arranged at intervals or abut against each other, and the two adjacent connection regions 22 are respectively connected with the portions of the outer envelope 20 corresponding to the connection regions 22; alternatively, the first and second liquid crystal display panels may be,
second attachment of two adjacent attachment zones 22 to the overwrap film 20: the sum of the widths of the two adjacent connection regions 22 in the thickness direction of the battery 10 is larger than the thickness of the battery 10, and after both the two adjacent connection regions 22 in the thickness direction of the battery 10 are folded over one of the third side wall 113 and the fourth side wall 114, the two adjacent connection regions 22 are superposed and attached to the outer cover film 20.
When the two adjacent connection areas 22 and the outer wrapping film 20 adopt the first connection mode, the end parts of the two adjacent connection areas 22 are arranged at intervals or abutted, the two adjacent connection areas 22 are respectively attached and connected with the outer wrapping film 20, and the number of overlapped layers of the outer wrapping film 20 is small, so that the outer wrapping film 20 has small influence on the external dimension of the battery 10, and the battery 10 is convenient to assemble. When the two adjacent connection areas 22 and the outer wrapping film 20 adopt the second connection mode, the two adjacent connection areas 22 are overlapped and connected with the corresponding connection area 22 of the outer wrapping film 20, so that the processing steps can be simplified, the connection and fixation of the connection areas 22 can be conveniently realized, and the processing efficiency can be improved.
In the present embodiment, the width of two adjacent connection regions 22 is the same, and the width of the third sidewall 113 and the width of the fourth sidewall 114 are the same.
The battery 10 includes a case including an aluminum case, and a top cover disposed at an upper end of the case.
Specifically, the outer wrapping film comprises a blue film, and the blue film is formed by coating a layer of blue protective film on the outer surface of the battery. The blue film is generally wrapped around the surface of the battery before shipment. Which can ensure good insulation of the outer surface of the battery and is therefore an indispensable part of the battery production process. The battery blue coating film can be protected, the surface of the battery is protected from being scratched and corroded by electrolyte, and the appearance of the battery is more attractive.
In order to facilitate understanding of the method for coating a battery provided in the present embodiment, the following description is made in conjunction with specific steps of the coating method, and since the upper end of the outer coating film 20 has two coating structures and two adjacent connection regions 22 have two connection modes with the outer coating film 20, the coating method includes four specific modes:
1) folding the remaining outer envelope (connection region 22) over the cell sidewall without overlapping/folding over the top cover: reserving a relatively long blue film, and folding the side wall of the blue film to the upper part of the aluminum shell; and cutting off the redundant blue film from the top cover to the bottom of the aluminum shell, and folding the residual blue film from the bottom of the battery to the top cover part all the time to realize the complete sealing of the bottom of the side wall of the battery. After the redundant outer covering film from the top cover to the bottom of the aluminum shell is cut and folded on the side wall of the battery, the folding positions of the left side and the right side of the same side wall are not overlapped, and the outer covering film does not fold the upper top cover;
2) folding the remaining outer envelope (connection region 22) over the cell sidewall does not overlap/fold over the top cover: reserving a relatively long blue film, and folding the side wall of the blue film to the upper part of the aluminum shell; and cutting off the redundant blue film from the top cover to the bottom of the aluminum shell, and folding the residual blue film from the bottom of the battery to the top cover part all the time to realize the complete sealing of the bottom of the side wall of the battery. After the redundant outer covering film from the top cover to the bottom of the aluminum shell is cut and folded on the side wall of the battery, the folding positions of the left side and the right side of the same side wall are not overlapped, and the outer covering film folds the upper top cover;
3) the remaining outer envelope (connection region 22) is folded over the cell side wall overlap/unfolded over the top cover: reserving a relatively long blue film, and folding the side wall of the blue film to the upper part of the aluminum shell; and cutting off the redundant blue film from the top cover to the bottom of the aluminum shell, and folding the residual blue film from the bottom of the battery to the top cover part all the time to realize the complete sealing of the bottom of the side wall of the battery. After the redundant outer packaging film from the top cover to the bottom of the aluminum shell is cut and folded on the side wall of the battery, the folding positions of the left side and the right side of the same side wall are overlapped, and the outer packaging film does not fold the upper top cover;
4) the remaining outer envelope (connection region 22) is folded over the cell side wall overlap/top cover: reserving a relatively long blue film, and folding the side wall of the blue film to the upper part of the aluminum shell; and cutting off the redundant blue film from the top cover to the bottom of the aluminum shell, and folding the residual blue film from the bottom of the battery to the top cover part all the time to realize the complete sealing of the bottom of the side wall of the battery. And after the redundant outer packaging film from the top cover to the bottom of the aluminum shell is cut and folded on the side wall of the battery, the folding positions of the left side and the right side of the same side wall are overlapped, and the outer packaging film folds the upper top cover.
In this embodiment, when the portion of the outer film 20 corresponding to the connection region 22 is connected to the connection region 22, the connection is performed by hot melting or by gluing, which has the advantages of simple connection structure and convenience for assembly.
The joining by heat fusion means that when the portion of the outer wrapper film 20 corresponding to the joining region 22 is joined to the joining region 22, the outer wrapper film 20 is heated and melted, so that the portion of the outer wrapper film 20 corresponding to the joining region 22 is joined to the joining region 22. The connection by means of rubberizing means that the portion of the outer wrapper 20 corresponding to the connection area 22 is connected to the connection area 22 by means of gummed paper.
In the present embodiment, the width of the first sidewall 111 is equal to the width of the second sidewall 112, and the width of the third sidewall 113 is equal to the width of the fourth sidewall 114.
As shown in fig. 2 to 15, a further embodiment of the present invention provides a battery including a case, a top cap provided at an upper end of the case, and an outer sheathing film 20. The lower surface of the case forms a bottom wall of the battery, the outer side wall of the case forms a side wall 11 of the battery, and the side wall 11 includes a first side wall 111 and a second side wall 112 oppositely disposed in a width direction of the bottom wall and a third side wall 113 and a fourth side wall 114 oppositely disposed in a length direction of the bottom wall. The upper ends of the first, second, third and fourth sidewalls 111, 112, 113 and 114 extend to the top cover, and the top cover forms a top wall 12 of the battery. The outer wrapping film 20 comprises a bottom film area and a side film area 23, the bottom film area is wrapped on the bottom wall of the battery, the side film area 23 is turned upwards to the side wall 11 of the battery, the height of the upper end of the side film area 23 is higher than half of the height of the battery, four overlapping sections 21 are formed after the side film area 23 is turned upwards, the connecting positions of two adjacent outer side walls of the shell are corners of the shell, and the four overlapping sections 21 are respectively located at the four corners of the shell. Wherein the side film region 23 includes a first side film 231, a second side film, a third side film 233 and a fourth side film, the first side film 231 includes a first attaching region 2311 and a first overlapping region 2312 connected with the first attaching region 2311, the second side film includes a second attaching region and a second overlapping region connected with the second attaching region, the third side film 233 includes a third attaching region 2331 and a third overlapping region 2332 connected with the third attaching region 2331, the fourth side film includes a fourth attaching region and a fourth overlapping region connected with the fourth attaching region, the first attaching region 2311 is attached with the first side wall 111, the second attaching region is attached with the second side wall 233112, the third attaching region is attached with the third side wall 113, the fourth attaching region is attached with the fourth side wall 114, the first overlapping region 2312 is overlapped with the fourth overlapping region to form a first overlapping section 211, and the fourth overlapping region is overlapped with the second overlapping section to form a third overlapping section 212, the second overlapping region overlaps the third overlapping region 2332 to form a third overlapping section 213, the third overlapping region 2332 overlaps the first overlapping region 2312 to form a fourth overlapping section 214, the four overlapping sections 21 are cut along the height direction of the battery so that the remaining parts of the four overlapping sections 21 after cutting form four connecting regions 22, and the connecting regions 22 are covered on the third attaching region 2331 and connected with the third attaching region 2331, or the connecting regions 22 are covered on the fourth attaching region and connected with the fourth attaching region.
By applying the battery provided by the embodiment, the outer wrapping film 20 can wrap all side walls of the battery 10, and the outer wrapping film 20 is of an integral structure, so that the whole side wall from the upper part to the bottom of the battery 10 can be completely sealed, water vapor is prevented from entering, and the insulating effect can be met. Moreover, by adopting the structure, the gluing process can be eliminated, the overall production yield of the battery can be improved, the material can be saved, the manufacturing and reworking cost can be reduced, and the processing cost of the battery can be further reduced.
The portion of the battery having a height of one half or more is the upper portion of the battery, and the upper end of the side film region 23 covers the portion of the battery having a height of one half or more, and includes the following two structures: 1) the upper end of the side film region 23 is higher than half of the height of the battery and lower than the top cover; 2) the upper end cover of the side film region 23 is arranged on the upper surface of the top cover.
The battery is processed by adopting the coating method of the battery.
Wherein, the width of the third sidewall 113 and the fourth sidewall 114 is the thickness of the battery, and the ratio of the width of the connection region 22 to the thickness of the battery is A, wherein A is more than 0 and less than or equal to 0.9. With the ratio of the width of the connection region 22 to the thickness of the cell set in the above range, two adjacent connection regions 22 have two connection means with the outer wrap film 20: the remaining outer envelope film (connection region 22) is folded over the cell side walls without overlapping and the remaining outer envelope film (connection region 22) is folded over the cell side walls with overlapping.
Specifically, when the ratio a of the width of the connection region 22 to the thickness of the battery is 0.5, the adjacent two connection regions 22 abut; when the ratio of the width of the connection region 22 to the thickness of the battery is 0 < A < 0.5, two adjacent connection regions 22 are disposed at intervals; when the ratio of the width of the connection region 22 to the thickness of the battery is 0.5 < A.ltoreq.0.9, two adjacent connection regions 22 are superposed.
Specifically, the upper end of the side film region 23 is higher than half the height of the battery and lower than the top cover, meaning that the top cover is not folded after the remaining outer envelope (connection region 22) is folded over the side wall of the battery. The upper end cap of the side film region 23 is disposed on the upper surface of the top cap, that is, the top cap is folded after the remaining outer envelope (connection region 22) is folded over the side wall of the cell.
Specifically, when the top cover is not folded after the remaining outer envelope (connection region 22) is folded over the side wall of the cell, the distance between the upper end of the side film region 23 and the upper surface of the top cover is between 0mm and 20 mm. The distance between the upper end of the side film region 23 and the upper surface of the top cover is set within the range, so that the sealing and protecting performance can be guaranteed, and the processing is facilitated. If the distance between the upper end of the side film region 23 and the upper surface of the top cover is greater than 20mm, the outer wrapping film cannot have the proper sealing and protecting performance.
Wherein, the distance between the upper end of the side film region 23 and the upper surface of the top cover may be 0mm, 5mm, 10mm, 15mm, 20mm, and any other value between 0mm and 20 mm.
Specifically, when the top cover is folded after the remaining outer envelope film (connection region 22) is folded on the side wall of the battery, the terminal post 15 is disposed on the top cover, the distance between the edge of the first side film 231 and the second side film and the terminal post 15 is 0mm to 50mm, and the distance between the edge of the third side film 233 and the fourth side film and the terminal post 15 is 0mm to 80 mm. The distance between the side film and the pole is set in the range, so that the protective performance of the outer wrapping film can be improved. If the distance between the side film and the post is greater than the above range, the side film is likely to interfere with the post.
The distance between the edge of the first side film 231 and the edge of the second side film and the pole 15 may be 0mm, 10mm, 20mm, 30mm, 40mm, 50mm, or any other value between 0mm and 50 mm. The distance between the edges of the third 233 and fourth 233 films and the pole 15 may be 0mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, and any other value between 0mm and 80 mm.
In this embodiment, two connection modes of two adjacent connection regions 22 and the outer coating film 20, and two coating modes of the upper end of the side film region 23 coating the upper portion of the battery are combined in pairs, including four coating structures of the battery, and the specific structure and coating method refer to the embodiment of the coating method.
Wherein, the outer envelope 20 is provided with the viscose (utilize the adhesive tape to connect the outer envelope 20 with the joining region 22), or the outer envelope 20 is the pyrocondensation membrane (the outer envelope 20 is heated and melted, make the outer envelope 20 correspond the part of joining region 22 and connect with the joining region 22), have simple in construction, easy to process and advantage with low costs.
Another embodiment of the present invention provides a battery module including the battery provided above. Therefore, the battery module can also wrap all the side walls of the battery 10 by using the outer wrapping film 20, so that the whole side wall from the upper part to the bottom of the battery 10 can be completely sealed, water vapor is prevented from entering, and the insulation effect can be met. And moreover, the gluing process can be eliminated, the overall production yield of the battery can be improved, the material can be saved, the manufacturing and reworking cost can be reduced, and the processing cost of the battery can be further reduced.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A battery enveloping method, wherein a battery (10) comprises a bottom wall, a side wall (11) and a top wall (12), the side wall (11) comprises a first side wall (111) and a second side wall (112) which are oppositely arranged along the width direction of the bottom wall, and a third side wall (113) and a fourth side wall (114) which are oppositely arranged along the length direction of the bottom wall, the battery enveloping method comprises the following steps:
placing an outer wrapping film (20) under the cell (10) such that the outer wrapping film (20) is in abutment with the bottom wall;
the parts of the outer wrapping film (20) on the two sides of the bottom wall in the width direction are folded upwards, so that the outer wrapping film (20) is respectively attached to the first side wall (111) and the second side wall (112);
the parts of the outer wrapping film (20) positioned at two sides of the bottom wall in the length direction are folded upwards, so that the outer wrapping film (20) is respectively attached to the third side wall (113) and the fourth side wall (114);
after the first side wall (111), the second side wall (112), the third side wall (113) and the fourth side wall (114) are attached to the outer wrapping film (20), the outer wrapping film (20) is formed with four overlapping sections (21) protruding outwards along two sides of the thickness direction of the battery (10), and the four overlapping sections (21) are cut along the height direction of the battery (10) so that the remaining parts of the four overlapping sections (21) after cutting form four connecting regions (22);
and turning over the two connecting areas (22) close to the third side wall (113) and attaching to the third side wall (113), and turning over the two connecting areas (22) close to the fourth side wall (114) and attaching to the fourth side wall (114).
2. The method for encapsulating a battery according to claim 1, wherein the upper end of the outer coating film (20) is located at a portion of more than one-half of the height of the battery (10) after the outer coating film (20) is completely attached to the side wall (11).
3. The method for encapsulating a battery according to claim 2, wherein after the outer envelope (20) is completely attached to the side wall (11), the upper end of the outer envelope (20) is located at a part of the battery (10) which is more than one-half of the height thereof, and comprises:
the upper end of the outer wrapping film (20) is folded to be above one half of the height of the battery (10), and the upper end of the outer wrapping film (20) is located below the top wall (12) so as to wrap the outer wrapping film (20) on the side wall (11) and the bottom wall; alternatively, the first and second electrodes may be,
the upper end of the outer wrapping film (20) is folded to be above one half of the height of the battery (10), and the upper end of the outer wrapping film (20) is located on the top wall (12) so as to wrap the outer wrapping film (20) on the edge of the top wall (12), the side wall (11) and the bottom wall.
4. The method for encapsulating a battery according to any one of claims 1 to 3, wherein folding both of the connection regions (22) near the third side wall (113) onto the third side wall (113) and in abutting connection with the third side wall (113) and folding both of the connection regions (22) near the fourth side wall (114) onto the fourth side wall (114) and in abutting connection with the fourth side wall (114), comprises:
the sum of the widths of two adjacent connecting regions (22) along the thickness direction of the battery (10) is less than or equal to the thickness of the battery (10), after two adjacent connecting regions (22) along the thickness direction of the battery (10) are folded to one of the third side wall (113) and the fourth side wall (114), the two adjacent connecting regions (22) are arranged at intervals or abut against each other, and the two adjacent connecting regions (22) are respectively connected with the parts of the outer wrapping film (20) corresponding to the connecting regions (22); alternatively, the first and second electrodes may be,
the sum of the widths of two adjacent connection regions (22) in the thickness direction of the battery (10) is larger than the thickness of the battery (10), and after both of the two adjacent connection regions (22) in the thickness direction of the battery (10) are folded onto one of the third side wall (113) and the fourth side wall (114), the two adjacent connection regions (22) are superposed and connected to a portion of the outer wrap film (20) corresponding to the connection region (22).
5. A battery, comprising:
a case, the lower surface of which forms a bottom wall of the battery, the outer side wall of which forms a side wall (11) of the battery, the side wall (11) comprising a first side wall (111) and a second side wall (112) oppositely arranged along the width direction of the bottom wall and a third side wall (113) and a fourth side wall (114) oppositely arranged along the length direction of the bottom wall;
a top cover covering the upper end of the case, the upper ends of the first side wall (111), the second side wall (112), the third side wall (113) and the fourth side wall (114) all extending to the top cover, and the upper surface of the top cover forming a top wall (12) of the battery;
the outer wrapping film (20) comprises a bottom film area and a side film area (23), the bottom film area is wrapped on the bottom wall of the battery, the side film area (23) is upwards folded onto the side wall (11) of the battery, the height of the upper end of the side film area (23) is higher than half of the height of the battery, the side film area (23) is upwards folded to form four overlapping sections (21), the connecting position of two adjacent outer side walls of the shell is a corner of the shell, and the four overlapping sections (21) are respectively located at the four corners of the shell;
wherein the side film regions (23) include a first side film (231), a second side film, a third side film (233) and a fourth side film, the first side film (231) includes a first attachment region (2311) and a first overlap region (2312) connected to the first attachment region (2311), the second side film includes a second attachment region and a second overlap region connected to the second attachment region, the third side film (233) includes a third attachment region (2331) and a third overlap region (2332) connected to the third attachment region (2331), the fourth side film includes a fourth attachment region and a fourth overlap region connected to the fourth attachment region, the first attachment region (2311) is attached to the first side wall (111), the second attachment region is attached to the second side wall (112), the third attachment region (2331) is attached to the third side wall (113), the fourth attaching area is attached to the fourth side wall (114), the first overlapping area (2312) is overlapped with the fourth overlapping area to form a first overlapping section (211), the fourth overlapping region overlaps the second overlapping region to form a second overlapping section (212), the second overlapping region overlaps the third overlapping region (2332) to form a third overlapping section (213), the third overlapping region (2332) overlaps the first overlapping region (2312) to form a fourth overlapping section (214), four overlapping sections (21) are cut in the height direction of the battery so that the remaining parts of the four overlapping sections (21) after cutting form four connection regions (22), the connecting region (22) covers the third attaching region (2331) and is connected with the third attaching region (2331), or the connecting area (22) is covered on the fourth attaching area and is connected with the fourth attaching area.
6. The battery according to claim 5, wherein the width of the third side wall (113) and the fourth side wall (114) is the thickness of the battery, and the ratio of the width of the connection region (22) to the thickness of the battery is A, wherein 0 < A ≦ 0.9.
7. The cell according to claim 5, characterised in that the upper end of the lateral membrane region (23) is higher than half the height of the cell and lower than the top cover.
8. The battery according to claim 7, characterized in that the distance between the upper end of the lateral membrane region (23) and the upper surface of the top cover is between 0 and 20 mm.
9. The cell according to claim 5, wherein an upper end cap of the side film region (23) is provided on an upper surface of the top cap.
10. The battery according to claim 9, wherein the top cover is provided with a pole post (15), the edges of the first side film (231) and the second side film are at a distance of 0mm to 50mm from the pole post (15), and the edges of the third side film (233) and the fourth side film are at a distance of 0mm to 80mm from the pole post (15).
11. A battery module characterized by comprising the battery according to any one of claims 5 to 10.
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |