CN220324667U - Cell membrane and cell - Google Patents
Cell membrane and cell Download PDFInfo
- Publication number
- CN220324667U CN220324667U CN202321947619.4U CN202321947619U CN220324667U CN 220324667 U CN220324667 U CN 220324667U CN 202321947619 U CN202321947619 U CN 202321947619U CN 220324667 U CN220324667 U CN 220324667U
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- 210000004027 cell Anatomy 0.000 title claims abstract description 194
- 210000000170 cell membrane Anatomy 0.000 title claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 19
- 239000007888 film coating Substances 0.000 abstract description 2
- 238000009501 film coating Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 229920002799 BoPET Polymers 0.000 description 5
- 239000005041 Mylar™ Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- -1 Polyethylene terephthalate Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010096 film blowing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a cell membrane and a cell, wherein the cell membrane comprises: the two large coating surfaces are arranged side by side; the two sides of the two coated side surfaces are connected with the sides of the two coated large surfaces to form a cavity with two open ends; and the bottom surface is coated, one opening is covered, a cavity with one end open is formed, and the cavity is of an integrated structure. The battery cell film provided by the utility model simplifies the manufacturing process of the battery cell and improves the appearance quality rate of the battery cell film coating.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a cell membrane and a cell.
Background
Lithium batteries have been rapidly developed in recent years as a power source for new energy automobiles. Square lithium batteries are one of the most common lithium ion battery structures in lithium battery applications. In the manufacturing process of the square lithium battery, after the bare cell is completed, the bare cell is required to be installed in a hard square aluminum shell to complete the assembly of the cell. Because the aluminum case is harder, there is a risk of scratching the bare cell. In order to effectively prevent the bare cell from being scratched in the process of being installed in the square aluminum shell, and in order to prevent the bare cell from being in direct contact with the aluminum shell in the process of transferring and using, so as to protect the bare cell and play an insulating role, a layer of polyester film (Mylar film) needs to be wrapped on the bare cell before the bare cell is installed in the aluminum shell. However, the process of coating the bare cell by the Mylar film has complex flow, and the mechanical structure of the coating equipment is complicated, so that the appearance fine rate of coating the Mylar film by the bare cell is reduced, and the manufacturing cost of the battery is increased.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present utility model is to provide a battery cell film, by which the process of coating a bare cell with the battery cell film is simplified, the manufacturing cost of the battery cell is reduced, and the appearance quality of the battery cell coated with the battery cell film is improved.
To achieve the above and other related objects, the present utility model provides a cell film comprising:
the two large coating surfaces are arranged side by side;
the two sides of the two coated side surfaces are connected with the sides of the two coated large surfaces to form a cavity with two open ends; and
the bottom surface is coated, one opening is covered, a cavity with one end open is formed, and the cavity is of an integrated structure.
In an embodiment of the present utility model, a thickness of the bottom surface of the coating ranges from 0.25mm to 0.35mm.
In an embodiment of the present utility model, a thickness of the coated large surface and the coated side surface ranges from 0.09mm to 0.11mm.
A battery cell, comprising:
a cell housing;
the bare cell is arranged in the inner cavity of the cell shell; and
the battery cell film is used for coating the side face of the bare battery cell, and the battery cell film is arranged between the battery cell shell and the bare battery cell.
In an embodiment of the utility model, the cell film is disposed in a cavity structure.
In an embodiment of the utility model, the battery cell further includes a top cover, and the top cover is disposed at one side of the bare cell.
In an embodiment of the utility model, the top cover is attached to the opening of the battery cell casing.
In an embodiment of the utility model, the battery cell further includes a first terminal, and the first terminal is disposed on the top cover.
In an embodiment of the utility model, the battery cell further includes a second post, and the second post is also disposed on the top cover and disposed on one side of the first post.
In an embodiment of the present utility model, a long side and a short side of the opening of the cell film are fixedly connected with the bare cell.
In summary, the battery cell film is arranged into the cavity structure formed integrally, so that the bare battery cell can be directly packaged, the turnover process and the rubberizing process of the battery cell film are eliminated, the manufacturing flow of the battery cell is simplified, the manufacturing cost of the battery cell is reduced, the production efficiency of the battery cell is improved, and the appearance quality rate of the battery cell film coated bare battery cell is improved. Through the electric core membrane that has the thickness of predetermineeing, not only effectual naked electric core is not by electric core casing fish tail, has the cushioning effect moreover. And the cell film with the cavity structure simplifies the mechanism of the manufacturing equipment and reduces the manufacturing cost of the manufacturing equipment.
Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a battery cell according to the present utility model.
Fig. 2 is a structural diagram of a cell film according to the present utility model.
Fig. 3 is a schematic diagram of a process for preparing a cell film according to the present utility model.
Fig. 4 is a schematic structural diagram of a grabbing cell film in the present utility model.
Fig. 5 is a schematic structural diagram of the air blast to the inner cavity of the cell membrane in the present utility model.
Fig. 6 is a schematic diagram of a structure of a bare cell mounted in a cell film according to the present utility model.
Fig. 7 is a schematic structural diagram of a thermal fusion of an opening of a cell film according to the present utility model.
Description of element reference numerals
100. A cell membrane; 110. coating the bottom surface; 120. coating a large surface; 130. coating the side surface; 200. a bare cell; 210. a top cover; 211. a first pole; 212. a second post; 300. a cell housing; 400. melted material particles; 410. a cavity type film; 420. shaping a mold; 430. a cavity type film after shaping; 500. carrying a suction nozzle; 600. a jig bottom plate; 610. and opening the suction nozzle.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.
Please refer to fig. 1 to 7. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. 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 utility model belongs and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.
In an embodiment of the present utility model, a cell film is provided and may be applied to a cell provided in the present application. The battery cell comprises a battery cell film 100, a bare cell 200 and a battery cell shell 300, wherein the battery cell film 100 coats the side face of the bare cell 200, the bare cell 200 is arranged in the inner cavity of the battery cell shell 300, and the battery cell film 100 is arranged between the bare cell 200 and the battery cell shell 300. A cover plate 210 is disposed on one side of the bare cell 200, the cover plate 210 is attached to the opening of the cell case 300, and a first pole 211 and a second pole 212 are disposed on the cover plate 210, where the first pole 211 is disposed on one side of the second pole 212. Through the battery cell film provided by the application, the bare battery cell is protected, the manufacturing cost of the battery cell is reduced, and the appearance quality rate of the battery cell coated with the battery cell film is improved.
Referring to fig. 1 and 2, in an embodiment of the utility model, the cell film 100 includes a cover bottom 110, two cover large sides 120, and two cover side surfaces 130. The two large covered surfaces 120 are arranged side by side, and two side edges of the two covered side surfaces 130 are connected with the side edges of the two large covered surfaces 120 to form a cavity with two open ends. The cladding bottom surface 110 covers an opening to form a cavity with one end open, and the cavity has an integrally formed structure. The cell film 100 is disposed in a cavity structure, and the cell film 100 is, for example, a Mylar film. The thickness d1 of the coating bottom surface 110 is, for example, 0.25mm to 0.35mm, the thickness d2 of the coating large surface 120 is, for example, 0.09mm to 0.11mm, the thickness d3 of the coating side surface 130 is also, for example, 0.09mm to 0.11mm, and the large thickness d1 of the coating bottom surface 110 can prevent the bare cell from directly contacting the aluminum case and has a damping effect. And the whole cell film 100 is arranged into a cavity structure, so that the bare cell 200 can be directly packaged, the packaging process of the bare cell 200 is simplified, and the production efficiency of the cell is improved.
Referring to fig. 1 and 3, in an embodiment of the present utility model, since the bare cell 200 needs to cover the surface of the bare cell 200 with the cell film 100 before being mounted in the cell case 300, the cell film 100 needs to be prepared. However, before the integrated cell film 100 is manufactured, the material particles of the cell film 100 need to be selected, and in this application, the material particles of the cell film 100 are, for example, polyester plastics (Polyethylene terephthalate, PET). And then heating and melting the material particles of the cell film 100 to obtain melted material particles 400. The melted material particles 400 are then blown using a shaping apparatus to obtain a cavity type film 410. The shaping device is, for example, a high-low pressure film blowing machine, and the shape of the cavity film 410 is, for example, cylindrical or cuboid, which is not limited in the shape of the cavity film 410. And then stretching and shaping the cavity film 410 by using the shaping die 420 to obtain the shaped cavity film 430. The shape and size of the shaping mold 420 are manufactured according to the shape and size of the bare cell 200, and in this application, the length and width of the shaping mold 420 are consistent with those of the bare cell 200, and the height of the shaping mold 420 is greater than that of the bare cell 200.
Referring to fig. 1, 2 and 3, in an embodiment of the present utility model, the shaped cavity film 430 is cut according to the coating requirement of the bare cell 200, that is, the height requirement of the bare cell, so as to obtain the cell film 100 capable of completely coating the bare cell 200. The cell film 100 is, for example, an integrated cavity Mylar film. After the preparation of the cell film 100 is completed, in order to facilitate the storage and transportation of the cell film 100, the short sides of the cell film 100 need to be folded, so that the two coated large surfaces 120 of the cell film 100 are attached. The folded cell film 100 reduces the volume of the cell film 100, and is convenient for packaging treatment, thereby being convenient for transportation and application.
Referring to fig. 1, 2, 4 and 5, in an embodiment of the present utility model, a die film 100 may be used to wrap a bare cell 200. Before the bare cell 200 is coated with the cell film 100, the folded cell film 100 needs to be taken out from the bin by using a plurality of handling nozzles 500, for example, vacuum chucks, where the handling nozzles 500 are used. One end of the plurality of carrying suction nozzles 500 is connected with the carrying mechanical arm, and the other end is attached to the large covered surface 120 of the folded cell film 100. The plurality of carrying suction nozzles 500 generate a certain degree of negative pressure to be fixedly connected with the folded cell film 100, and the folded cell film 100 is picked up by the movement of the carrying mechanical arm and placed on the jig bottom plate 600. The jig base plate 600 is provided with a plurality of exhaust holes, and the large covered surface 120 of the folded cell film 100 is attached to the plurality of exhaust holes. When the negative pressure in the carrying suction nozzle 500 disappears, the exhaust hole generates negative pressure, and the folded cell film 100 is fixed on the jig base plate 600.
Referring to fig. 1, 2 and 5, in an embodiment of the present disclosure, after the folded cell film 100 is fixed on the fixture bottom plate 600, the opening suction nozzle 610 is attached to the large covering surface 120 of the folded cell film 100, and the opening suction nozzle 610 is disposed near the opening of the cell film 100. One end of the opening suction nozzle 610 is connected to the mechanical arm, and the other end generates a negative pressure to a certain extent and is fixedly connected to the large covering surface 120, wherein the number of the opening suction nozzles 610 is 2, for example. The mechanical arm moves in the vertical direction to drive the opening suction nozzle 610 to move, so that the opening of the folded cell film 100 is opened to a preset distance, and the opening of the cell film 100 is kept in an opened state. A blowing device 620 is disposed on one side of the jig base plate 600, and an air outlet of the blowing device 620 faces the opening of the cell film 100. The blowing device 620 blows air into the inner cavity of the cell film 100 to obtain the cell film 100 with the expanded inner cavity, and the cell film 100 with the expanded inner cavity is beneficial to the loading efficiency of the bare cell 200.
Referring to fig. 1, 2 and 6, in an embodiment of the present disclosure, before the die 200 is coated with the die film 100, the assembled die 200 needs to be obtained. Firstly, the code scanning is required to be performed on the bare cell 200 of the incoming material, whether the quality of the bare cell 200 meets the preset requirement is judged, if the quality of the bare cell 200 can not meet the preset requirement, the bare cell 200 is judged as a bad product, and the bad bare cell 200 is discharged. If the quality of the bare cell 200 meets the preset requirement, the bare cell 200 is subjected to dust removal treatment, and the bare cell 200 after the dust removal treatment is the bare cell 200 capable of being coated with the cell film 100. And the bare cell 200 is transported into the cell film 100 with the inner cavity expanded according to the direction away from the top cover 210 until one side of the bare cell 200 opposite to the cover plate 210 is attached to the bottom of the cell film 100.
Referring to fig. 1, 2, 6 and 7, in one embodiment of the present disclosure, after the bare cell 200 is transferred into the cavity of the cell film 100, the cover 210 is disposed at the opening of the cell film 100. Because the cell film 100 is not fixedly connected with the bare cell 200, the opening of the cell film 100 needs to be subjected to hot melting treatment, and the long side and the short side of the opening of the cell film 100 need to be subjected to hot melting treatment, so that the opening of the cell film 100 is fixedly connected with the bare cell 200, and the cell film 100 is coated on the bare cell 200. After the bare cell 200 is covered by the cell film 100, a thermal melting point detection is required, that is, a thermal melting point at an opening of the cell film 100 is detected, and whether the thermal melting point at the opening meets a preset standard is determined. If the thermal melting point at the opening does not meet the preset standard, the bare cell 200 of the coated cell film 100 is determined to be bad and the bad bare cell 200 is discharged. If the thermal melting point at the opening meets the preset standard, the bare cell 200 enters the next process for processing, and the bare cell 200 coated with the cell film 100 is loaded into the cavity of the cell housing 300.
In summary, the utility model omits the processes of feeding the bottom support sheet and hot melting the bottom support sheet by integrally forming the battery cell film, and sets the battery cell film into a cavity structure, so that the bare battery cell can be directly packaged, the turnover process and the rubberizing process of the battery cell film are cancelled, the manufacturing flow of the battery cell is simplified, the manufacturing cost of the battery cell is reduced, the production efficiency of the battery cell is improved, the appearance quality rate of the battery cell film coating the bare battery cell is improved, and the bare battery cell is effectively protected from being scratched by the battery cell shell. And the cell film with the cavity structure simplifies the mechanism of the manufacturing equipment and reduces the manufacturing cost of the manufacturing equipment. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A cell membrane, comprising:
the two large coating surfaces are arranged side by side;
the two sides of the two coated side surfaces are connected with the sides of the two coated large surfaces to form a cavity with two open ends; and
the bottom surface is coated, one opening is covered, a cavity with one end open is formed, and the cavity is of an integrated structure.
2. The cell membrane of claim 1, wherein the thickness of the clad bottom surface ranges from 0.25mm to 0.35mm.
3. The cell membrane of claim 1, wherein the thickness of the coated large surface and the coated side surface is in the range of 0.09mm to 0.11mm.
4. A cell, comprising:
a cell housing;
the bare cell is arranged in the inner cavity of the cell shell; and
the cell film of any of claims 1-3, coated on a side of the bare cell, and disposed between the cell housing and the bare cell.
5. The cell of claim 4, wherein the cell membrane is disposed in a cavity configuration.
6. The cell of claim 4, further comprising a cap disposed on one side of the bare cell.
7. The cell of claim 6, wherein the cap is attached to the opening of the cell housing.
8. The cell of claim 7, further comprising a first post disposed on the top cover.
9. The cell of claim 8, further comprising a second post also disposed on the top cover and on one side of the first post.
10. The cell of claim 4, wherein the long side and the short side of the opening of the cell membrane are fixedly connected to the bare cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321947619.4U CN220324667U (en) | 2023-07-24 | 2023-07-24 | Cell membrane and cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321947619.4U CN220324667U (en) | 2023-07-24 | 2023-07-24 | Cell membrane and cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220324667U true CN220324667U (en) | 2024-01-09 |
Family
ID=89425892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321947619.4U Active CN220324667U (en) | 2023-07-24 | 2023-07-24 | Cell membrane and cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220324667U (en) |
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2023
- 2023-07-24 CN CN202321947619.4U patent/CN220324667U/en active Active
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