CN217114579U - Shell structure of battery cell cover plate - Google Patents
Shell structure of battery cell cover plate Download PDFInfo
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- CN217114579U CN217114579U CN202220627328.6U CN202220627328U CN217114579U CN 217114579 U CN217114579 U CN 217114579U CN 202220627328 U CN202220627328 U CN 202220627328U CN 217114579 U CN217114579 U CN 217114579U
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- cover plate
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Abstract
The utility model provides an electric core cover plate shell structure, which comprises an electric core shell, two edge cover plates and a connecting part, wherein at least one side edge of the electric core shell is provided with an open slot, and each edge cover plate is respectively welded with the open slot through the connecting part; the three pairs of side surfaces of the battery cell shell are sequentially a first side surface, a second side surface and a third side surface according to the circumferential length, the open slot is formed in the second side surface or the third side surface, the connecting portion is connected to the surface of the edge cover plate, the size of the connecting portion is the same as that of the open slot, the edge cover plate is connected with the open slot in a sealing mode through the connecting portion, and an explosion-proof valve is embedded in one side surface, far away from the connecting portion, of the edge cover plate. The utility model discloses can reduce electric core shell structure's weldment work volume to improve product welding uniformity and qualification rate, improved product quality.
Description
Technical Field
The utility model relates to an electricity core technical field especially relates to an electricity core cover plate shell structure.
Background
The battery cell refers to a single electrochemical battery cell containing a positive electrode and a negative electrode, and is generally not used directly. The battery is different from a battery which comprises a protection circuit and a shell and can be directly used. The welding track of general electric core is that apron and casing laser welding track are casing a week, and the orbit is longer, and apron thickness is thinner, generally is 0.2 ~ 0.6mm, when carrying out laser welding with two kinds of casings that have now, apron distortion phenomenon when all can appearing the assembly difficulty and welding to it is good with the welding track to lead to first half laser welding effect, and second half welding effect is relatively poor with the uniformity. The existing strip shell inevitably has a distortion phenomenon, the matching difficulty with the cover plate is high, the matching condition is concerned when the laser welding is needed, and the labor is consumed; the side wall and the bottom verticality of the existing shell-pulling structure have errors, so that the explosion-proof valve is not tightly attached to the shell easily, the explosion point phenomenon is easily generated during welding of the explosion-proof valve, and the qualification rate is low.
Therefore, there is a need to provide a novel cell cover plate casing structure to solve the above problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electricity core cover plate shell structure can reduce welding load to improve product welding uniformity and qualification rate, improve product quality.
In order to achieve the above object, the electrical core cover plate shell structure of the present invention includes an electrical core shell, two edge cover plates and a connecting portion, at least one side edge of the electrical core shell is provided with an open slot, and each edge cover plate is welded with the open slot through the connecting portion;
the three pairs of side surfaces of the battery cell shell are sequentially a first side surface, a second side surface and a third side surface according to the circumference size, the open slot is formed in the second side surface or the third side surface, the connecting part is connected to the surface of the edge cover plate, the size of the connecting part is the same as that of the open slot, the edge cover plate is connected with the open slot in a sealing mode through the connecting part, and the explosion-proof valve is embedded in the surface of one side, away from the connecting part, of the edge cover plate.
Electric core apron shell structure's beneficial effect lies in: through setting up the open slot at second side or third side for after the open slot that the apron passes through connecting portion and electric core shell is connected at the marginal apron, welding distance diminishes at the welded in-process, has not only reduced welding load, reduce cost, can increase welding process's uniformity moreover, adopt mutually supporting of connecting portion and open slot simultaneously, can improve the qualification rate of product, and explosion-proof valve direct mount can effectively prevent because the explosion point phenomenon that laminating error appears on the apron of marginal.
Optionally, the corner of the connecting portion and the corner of the open slot are both set to be arc-shaped.
Optionally, a distance between a side edge of the edge cover plate and a side edge of the connection portion is not less than the thickness of the cell casing.
Optionally, the outer wall of the connecting portion, which is in contact with the open slot, is provided with a sealing layer.
Optionally, the length of the cell casing is 200mm to 600mm, and the width of the cell casing is 50mm to 150 mm.
Optionally, a silica gel layer is arranged at the corner of the battery cell shell.
Optionally, the thickness of the silica gel layer is 1mm to 3 mm.
Optionally, the inside of the silica gel layer is of a hollow structure.
Optionally, the silica gel layer is of a columnar structure.
Optionally, the thickness of the sealing layer is 0.1mm to 0.3 mm.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a cell cover plate shell structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cell casing of the cell cover plate casing structure of the present invention;
fig. 3 is a schematic diagram of the overall structure of the cell cover plate casing structure of the present invention when a battery cell manufactured by a lamination type processing method is installed;
fig. 4 is a schematic structural diagram of the cell cover plate casing structure when the winding-type processing method is used to install the fabricated cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
In view of the problems in the prior art, an embodiment of the present invention provides a cell cover plate shell structure, referring to fig. 1, including a cell shell 1, edge cover plates 2 and a connecting portion 3, where at least one side edge of the cell shell 1 is provided with an open slot 101, the number of the edge cover plates 2 is two, and each edge cover plate 2 is welded to the open slot 101 through the connecting portion 3;
referring to fig. 2, three pairs of side surfaces of the cell shell 1 are sequentially a first side surface 102, a second side surface 103, and a third side surface 104 according to the circumference size, the open slot 101 is disposed on the second side surface 103 or the third side surface 104, the connection portion 3 is connected to the surface of the edge cover plate 2, the size of the connection portion 3 is the same as that of the open slot 101, the edge cover plate 2 is hermetically connected to the open slot 101 through the connection portion 3, and an explosion-proof valve 4 is embedded in the surface of one side of the edge cover plate 2, which is far away from the connection portion 3.
In this embodiment, the first side surface 102 of the cell casing 1 is an upper and lower side surface, the second side surface 103 is a left and right side surface, the third side surface 104 is a front and rear side surface, since the circumferences of the first side 102, the second side 103 and the third side 104 are sequentially reduced, by providing the opening groove 101 at the second side 103 or the third side 104, the connection distance between the connection part 3 of the edge cover plate 2 and the opening groove 101 is made shorter, when the connecting part 3 and the cell shell 1 are subjected to laser welding, the welding distance between the connecting part 3 and the cell shell 1 is shortened, compared with the prior art that the first side surface 102 is used as the connecting position of the cover plate and the shell, the welding distance is effectively reduced, therefore, the welding effect after the connection part 3 and the battery core shell 1 are welded is good, the welding track is consistent front and back, the front and back welding errors are reduced, and the welding quality of the whole shell is improved.
On the other hand, the edge cover plate 2 is manufactured by adopting a milling process, has higher strength and hardness, and is not easy to damage during welding.
And connecting portion 3 of installing on edge cover plate 2 forms a step structure, conveniently fixes a position open slot 101 through connecting portion 3, is convenient for insert connecting portion 3 inside open slot 101 fast, and the follow-up welding process of being convenient for goes on, improves assembly efficiency.
In some embodiments, the explosion-proof valve 4 is directly installed on the surface of the edge cover plate 2, so that after the edge cover plate 2 is welded with the cell shell 1, the explosion-proof valve 4 does not need to be installed separately, thereby effectively preventing the explosion point phenomenon of the edge cover plate 2 when the explosion-proof valve 4 is welded, and improving the yield of products.
In other embodiments, since the cell shells 1 may be respectively and correspondingly mounted with different cells, when a cell manufactured by a lamination type processing method needs to be mounted, referring to fig. 3, the number of the opening grooves 101 is two, and the number of the edge cover plates 2 is also two, and the opening grooves are disposed on the third side surface 104; when the battery cell produced by the winding type processing method needs to be installed, referring to fig. 4, the opening groove 101 is arranged on the second side surface 103, and the number of the opening groove 101 and the number of the edge cover plates 2 are both one, so that different shell structures can be conveniently selected for installation according to different production types of battery cells, and the applicability is strong.
In some embodiments, the corners of the connecting portion 3 and the corners of the open slot 101 are both set to be circular-arc shapes. Through setting up connecting portion 3 into circular-arc corner for it is in the same place, simple to operate more easily to laminate between connecting portion 3 and the open slot 101.
In some embodiments, the distance between the side edge of the edge cover plate 2 and the side edge of the connection portion 3 is not less than the thickness of the cell casing 1, so that the edge cover plate 2 is inserted into the opening groove 101 of the cell casing 1 through the connection portion 3 and welded together to completely cover the entire cell casing 1 for protection.
Specifically, when the distance between the side edge of the edge cover 2 and the side edge of the connecting portion 3 is greater than the thickness of the cell casing 1, the distance between the side edge of the edge cover 2 and the side edge of the connecting portion 3 is not more than twice the thickness of the cell casing 1.
In still other embodiments, the distance between the side surface of the edge cover 2 and the side surface of the connecting portion 3 is equal to the thickness of the cell casing 1, so that the edge cover 2 and the cell casing 1 are completely attached after being mounted together, and the whole casing structure is not more flat in edge portion.
In some embodiments, the outer wall of the connecting portion 3 contacting the open groove 101 is provided with a sealing layer 301 to improve the sealing property between the connecting portion 3 and the open groove 101.
In some embodiments, the sealing layer 301 has a thickness of 0.1mm to 0.3 mm.
In some embodiments, the cell casing has a length of 200mm to 600mm and a width of 50mm to 150 mm. Specifically, the length of the first side surface 102 is 200mm to 600mm, and the width thereof is 50mm to 150 mm.
In a further embodiment, the first side 102 has a length of 500mm and a width of 130 mm.
In some embodiments, a silica gel layer 105 is disposed at a corner of the cell casing 1, so as to protect the corner of the cell casing 1.
In some embodiments, the inside of the silicone gel layer 105 is a hollow structure, the thickness of the silicone gel layer 105 is 1mm to 3mm, and the silicone gel layer 105 is a columnar structure.
Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the appended claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (10)
1. A shell structure of a cell cover plate is characterized by comprising a cell shell, two edge cover plates and a connecting part, wherein at least one side edge of the cell shell is provided with an open slot, and each edge cover plate is respectively welded with the open slot through the connecting part;
the three pairs of side surfaces of the battery cell shell are sequentially a first side surface, a second side surface and a third side surface according to the circumference size, the open slot is formed in the second side surface or the third side surface, the connecting part is connected to the surface of the edge cover plate, the size of the connecting part is the same as that of the open slot, the edge cover plate is connected with the open slot in a sealing mode through the connecting part, and the explosion-proof valve is embedded in the surface of one side, away from the connecting part, of the edge cover plate.
2. The cell cover plate casing structure of claim 1, wherein corners of the connecting portion and corners of the open slot are both arc-shaped.
3. The cell cover casing structure of claim 1, wherein a distance between a side edge of the edge cover and a side edge of the connection portion is not less than a thickness of the cell casing.
4. The cell cover plate shell structure of claim 3, wherein the outer wall of the connecting part, which is in contact with the open groove, is provided with a sealing layer.
5. The cell cover casing structure of claim 3, wherein the length of the cell casing is 200mm to 600mm, and the width of the cell casing is 50mm to 150 mm.
6. The cell cover plate shell structure of claim 1, wherein a silicone layer is disposed at a corner of the cell shell.
7. The cell cover plate casing structure of claim 6, wherein the thickness of the silicone layer is 1mm to 3 mm.
8. The electrical core cover plate shell structure of claim 6, wherein the silicone layer is hollow inside.
9. The electrical core cover plate shell structure of claim 6, wherein the silicone layer is a columnar structure.
10. The cell cover plate housing structure of claim 4, wherein the sealing layer has a thickness of 0.1mm to 0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627328.6U CN217114579U (en) | 2022-03-22 | 2022-03-22 | Shell structure of battery cell cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627328.6U CN217114579U (en) | 2022-03-22 | 2022-03-22 | Shell structure of battery cell cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217114579U true CN217114579U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220627328.6U Active CN217114579U (en) | 2022-03-22 | 2022-03-22 | Shell structure of battery cell cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217114579U (en) |
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2022
- 2022-03-22 CN CN202220627328.6U patent/CN217114579U/en active Active
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