CN216750078U - Battery cell shell, battery and battery module - Google Patents
Battery cell shell, battery and battery module Download PDFInfo
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- CN216750078U CN216750078U CN202122441508.3U CN202122441508U CN216750078U CN 216750078 U CN216750078 U CN 216750078U CN 202122441508 U CN202122441508 U CN 202122441508U CN 216750078 U CN216750078 U CN 216750078U
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- welding
- battery
- butt joint
- shell body
- extension part
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- 238000003466 welding Methods 0.000 claims abstract description 130
- 210000001503 joint Anatomy 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000007769 metal material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000003032 molecular docking Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
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- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a battery cell shell, a battery and a battery module, which comprise a shell body formed by bending and connecting at least one metal plate, wherein the shell body comprises at least two butt joint surfaces and at least one welding line, and the welding line is formed on the butt joint surfaces and connects the shell body into a closed structure through the welding line; the butt joint face is provided with at least one welding extension part extending from the welding seam, and the welding extension part is an inner welding extension part or an outer welding extension part. The welding structure of the cell shell is optimized, the problem of welding of the long cell shell is solved, and the quality of the battery is improved.
Description
Technical Field
The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a battery cell shell, a battery and a battery module.
Background
Nowadays, as a novel secondary battery, the lithium ion battery has the advantages of high energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospects in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. Electric type car uses the battery module as the power supply, and the battery module includes a plurality of series-parallel batteries, and the battery includes structures such as electric core, casing and apron.
In the existing structure, a long-sized battery cell cannot be completely placed from one end of a shell when entering the shell, an opening for placing the battery cell into the shell is required to be reserved in the shell, the shell is closed in a welding mode after the placement is completed, but the battery cell shell is generally thin, and the internal battery cell is easily damaged during welding.
SUMMERY OF THE UTILITY MODEL
One of the objects of the present invention is: the welding structure of the cell shell is optimized, the problem of welding of the long cell shell is solved, and the quality of a battery is improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a battery cell shell comprises a shell body formed by bending and connecting at least one metal plate, wherein the shell body comprises at least two butt joint surfaces and at least one welding line, and the welding line is formed on the butt joint surfaces and connects the shell body into a closed structure through the welding line; the butt joint face is provided with at least one welding extension part extending from the welding seam, and the welding extension part is an inner welding extension part or an outer welding extension part.
Preferably, the inner weld extension extends along an edge of the abutment surface; the inner weld extension is located inside the shell body.
Preferably, at least one surface of the inner welding extension part is attached to the butt joint surface, and the thickness of the inner welding extension part is smaller than 1 mm.
Preferably, the butt joint surface and the inner welding extension part are of an integrally formed structure or a split structure.
Preferably, the inner weld extension is triangular or rectangular in shape.
Preferably, the outer welding extensions of the two abutting surfaces are overlapped, and the two outer welding extensions extend in a direction away from the shell body; the outer weld is located outside the shell body.
Preferably, the angle between the outer welding extension and the outer wall of the shell body is alpha, and alpha is greater than 90 degrees and less than 180 degrees.
Preferably, the two abutting surfaces are arranged vertically.
The utility model also provides a battery, which comprises a battery core; a cover plate; in the battery cell shell, the battery cell is arranged inside the shell body, and the cover plate covers the opening of the shell body.
Preferably, the battery core comprises pole pieces of at least two sizes.
Another object of the present invention is to provide a battery module including a plurality of the above batteries.
The shell body is formed by bending and connecting at least one metal plate, the shell body comprises at least two butt joint surfaces and at least one welding line, and the welding line is formed on the butt joint surfaces and connects the shell body into a closed structure through the welding line; the butt joint face is provided with at least one welding extension part extending from the welding seam, and the welding extension part is an inner welding extension part or an outer welding extension part. Considering that in the existing structure, a long-sized battery cell cannot be completely placed from one end of a shell when being placed into the shell, an opening for placing the battery cell needs to be reserved in the shell, the shell is closed in a welding mode after the placement is finished, but the battery cell shell is generally thin, and the internal battery cell is easily damaged during welding, therefore, at least one metal plate meeting the size requirement is prepared, the metal plate is bent according to the size of the battery cell to form at least two butt joint surfaces, the shell body is connected into a closed structure through welding by the two butt joint surfaces, a welding seam is formed on the butt joint surfaces, an internal welding extension part or an external welding extension part is arranged at the butt joint surfaces, the problem that the internal part of the battery cell is easily damaged during welding is solved by increasing the edge thickness of the butt joint surfaces, namely thickening the internal part of the butt joint of the shell body, laser welding is facilitated, and the problem that the internal part of the metal plate is thin is easily damaged during welding is solved, wherein the internal welding extension part or the external welding extension part extends from the welding seam, the contact area of the inner welding extension part and the butt joint surfaces is increased, so that the stability between the two butt joint surfaces is improved, and the quality of the battery is improved. The welding structure of the cell shell is optimized, the problem of welding of the long cell shell is solved, and the quality of the battery is improved.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a housing body according to a first embodiment of the present invention.
Fig. 2 is a schematic side view of a housing body according to a first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a battery according to a first embodiment of the present invention.
Fig. 4 is a side view schematically illustrating a structure of a case body according to a second embodiment of the present invention.
Fig. 5 is a schematic side view of a housing body according to a third embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a battery according to a third embodiment of the present invention.
Fig. 7 is a schematic diagram of the battery structure of the present invention.
Wherein the reference numerals are as follows:
1-a shell body; 11-a butt-joint face; 12-a weld; 13-opening;
31-inner weld extension; 32-outer weld extension;
and 4-electric core.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to fig. 1 to 7, but the present invention is not limited thereto.
Implementation mode one
The first embodiment will be described with reference to the accompanying drawings 1 to 3
The battery module of the present embodiment includes a housing portion and a battery located in the housing portion. The receiving portion may be provided in various ways, for example, the receiving portion includes a side plate and an end plate which are sequentially connected to each other in a surrounding manner. Alternatively, the accommodating part comprises two end plates which are oppositely arranged and a strap which surrounds the end plates and the battery.
In some embodiments, there may be a plurality of batteries, and the plurality of batteries are disposed side by side in the receiving portion. The accommodating part can be made of metal materials or non-metal materials, for example, when the accommodating part is made of metal materials, the materials can be aluminum alloy, steel materials and the like, here, the materials of the accommodating part are not limited, and suitable materials of the accommodating part can be selected according to actual needs of accelerating heat dissipation of the battery module and the like.
In some embodiments, the number of the cells in one cell module may be one or multiple, and when the cell module includes multiple cells, the multiple cells may be arranged in rows and columns and disposed in the box. The battery is used as a storage carrier of electric energy and is used for storing electric energy required by the electric device.
The battery of the present embodiment includes a cell casing and a cover plate, where the cell casing includes a plurality of walls enclosing an accommodation space and an opening formed on one side of the accommodation space. The cover plate is disposed at the opening to close the receiving space. Be provided with first utmost point post and second utmost point post on the apron, first utmost point post and second utmost point post are as the outer end of leading to of battery, and it is used for with other part electric connection. The same battery is provided with two poles, namely a positive pole and a negative pole, and the battery generally comprises electrolyte which is contained in a containing space of the shell.
The battery core shell of the embodiment is used for a battery, and comprises a shell body 1 formed by bending and connecting at least one metal plate, wherein the shell body 1 comprises at least two butt joint surfaces 11 and at least one welding seam 12, and the welding seam 12 is formed on the butt joint surfaces 11 and connects the shell body 1 into a closed structure through the welding seam 12; at least one welding extension extending from the welding seam 12 is provided at the abutting surface 11, and the welding extension is an inner welding extension 31.
Considering that in the existing structure, a long-sized battery cell cannot be completely placed from one end of a shell when being placed into the shell, an opening for placing the battery cell needs to be reserved in the shell, the shell is closed in a welding mode after the placement is completed, but the battery cell shell is generally thin, and the internal battery cell is easily damaged during welding, therefore, at least one metal plate meeting the size requirement is prepared, the metal plate is bent according to the size of the battery cell to form at least two butt joint surfaces 11, the shell body 1 is connected into a closed structure through welding by the two butt joint surfaces 11, a welding seam 12 is formed on the butt joint surfaces 11, furthermore, at least one internal welding extension part 31 is arranged at the butt joint surface 11, the thickness of the edge at the butt joint surface 11 is increased, namely, the internal part at the butt joint of the shell body 1 is subjected to laser welding, the problem that the internal part of the battery cell is easily damaged during welding is solved, wherein, the extension of the inner welding extension 31 from the weld 12 helps to increase the contact area of the inner welding extension 31 and the abutment surfaces 11, thereby improving the stability between the two abutment surfaces 11 and thus the quality of the battery.
Specifically, with the shell body 1 of the cuboid that a metal sheet bending connection becomes both ends and switches on, this shell body 1 has two butt joint faces 11, welding extension 31 in one of them butt joint face 11 is equipped with, the one side and the laminating of another butt joint face 11 of welding extension 31 make shell body 1 connect to be a closed structure through the welding, according to the actual production demand, the metal sheet can adopt die-casting or other mode to make, interior welding extension 31 also can be formed on butt joint face 11 through die-casting or other integrated into one piece's mode. The inner weld extension 31 and the abutment surface 11 may be of the same metallic material.
The metal plate is preferably an aluminum foil, but may be another metal.
In the cell casing according to the present invention, the inner welding extension 31 extends along the edge of the docking surface 11, which helps to increase the contact area between the inner welding extension 31 and the docking surface 11, thereby improving the stability between the two docking surfaces 11 and thus improving the quality of the battery. Wherein, interior welding extension 31 is located the inside of shell body 1, reduces interior welding extension 31 and takes place to collide with external parts, leads to the impaired condition of interior welding extension 31.
In the cell shell according to the utility model, at least one surface of the inner welding extension part 31 is attached to the abutting surface 11, so that the shell body 1 is connected into a closed structure through welding, which is beneficial to improving the stability of the whole shell, and the thickness of the inner welding extension part 31 is smaller than 1mm, so that the inner welding extension part 31 is prevented from being too large in thickness, which causes excessive encroachment on the internal space of the battery, and is not beneficial to improving the energy density of the battery.
In the cell shell according to the present invention, the abutting surface 11 and the inner welding extension 31 are integrally formed, so that a process of installing the inner welding extension 31 is omitted, and the mechanical strength between the abutting surface 11 and the inner welding extension 31 is improved, the probability of falling off of the inner welding extension 31 is reduced, and the stability of the cell shell is improved.
In the cell casing according to the present invention, the inner weld extension 31 is triangular or rectangular in shape. Specifically, the inner welding extension 31 is a convex structure, and the shape of the inner welding extension 31 includes but is not limited to a right triangle, a rectangle or other regular shapes, which is suitable for facilitating welding, and preferably, a right triangle is used.
Second embodiment
The difference from the first embodiment is that: the abutment surface 11 and the inner weld extension 31 of the present embodiment are of a split construction. Specifically, the butt joint surfaces 11 and the inner welding extension portions 31 are separable, after the battery core is placed in the battery core, the inner welding extension portions 31 are placed at the butt joint positions of the two butt joint surfaces 11, the inner welding extension portions 31 are of strip-shaped structures and serve as welding-assisting rods, the two butt joint surfaces 11 are facilitated to be welded, the inner welding extension portions 31 in different shapes can be replaced according to the structure of an actual battery, the whole shell body 1 is omitted, welding cost is facilitated to be reduced, the thicknesses of metal plates are the same, standardized production of the metal plates is facilitated, production cost of a shell is reduced, the inner welding extension portions 31 are of strip-shaped structures, the inner welding extension portions 31 can be rectangular, triangular or other shapes, and the rectangular shape is preferably adopted. The inner welding extension 31 and the abutting surface 11 may be made of the same metal material, or different metal materials.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: the welding extension part of the present embodiment is an outer welding extension part 32, the outer welding extension parts 32 of the two butt joint surfaces 11 are overlapped, and the two outer welding extension parts 32 extend in the direction away from the shell body 1; the outer welding extension 32 is located outside the shell body 1, and the included angle between the outer welding extension 32 and the outer wall of the shell body 1 is alpha, wherein alpha is more than 90 degrees and less than 180 degrees. Specifically, outer welding extension 32 is located the outside of shell body 1, outer welding extension 32 can understand the partly that the metal sheet reserved in width direction, this part is in the outside of shell body 1 after the metal sheet buckles, this kind of structure does not invade the inside space of shell body 1, help improving the space utilization of battery, thereby improve the energy density of battery, after putting into electric core, two overlap joint 11's outer welding extension 32 coincidence, help carrying out laser welding, and outer welding extension 32 is located the outside of shell body 1, it is thinner to solve the metal sheet, damage the inside problem of electric core easily when the welding, after the welding is accomplished, outer welding extension 32 can be tailor or the welding part of polishing, make electric core casing appearance size satisfy the requirement. Wherein, outer welding extension 32 can be buckled, and inject the contained angle between the outer wall of outer welding extension 32 and shell body 1 for two outer welding extensions 32 coincidence of butt joint face 11 is convenient for weld.
Other structures are the same as those of the first embodiment, and are not described herein again.
Battery and battery module
The present invention includes the cell casing of the first to third embodiments.
Specifically, the battery comprises a battery core 4; a cover plate; and foretell electric core casing, electric core 4 set up inside shell body 1, and the opening 13 of apron closing cap shell body 1.
When the cell casing of the first embodiment and the second embodiment is adopted, the inner welding extending portion 31 occupies part of the inner space of the battery, if the cell 4 adopts a laminated structure, pole pieces of at least two sizes can be designed to match the shape of the inner welding extending portion 31, which is helpful for improving the space utilization rate inside the battery, so as to improve the energy density of the battery.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (11)
1. A battery cell shell comprises a shell body (1) formed by bending and connecting at least one metal plate, wherein the shell body (1) comprises at least two butt joint surfaces (11) and at least one welding seam (12), and the welding seam (12) is formed on the butt joint surfaces (11) and connects the shell body (1) into a closed structure through the welding seam (12);
the method is characterized in that: and at least one welding extension part extending from the welding seam (12) is arranged on the butt joint surface (11), and the welding extension part is an inner welding extension part (31) or an outer welding extension part (32).
2. The cell casing of claim 1, wherein: the inner welding extension (31) extends along an edge of the abutment surface (11);
the inner weld extension (31) is located inside the shell body (1).
3. The cell casing of claim 2, wherein: at least one surface of the inner welding extension part (31) is attached to the butt joint surface (11), and the thickness of the inner welding extension part (31) is smaller than 1 mm.
4. The cell casing of claim 3, wherein: the butt joint surface (11) and the inner welding extension part (31) are of an integrally formed structure or a split structure.
5. The cell casing of claim 4, wherein: the inner weld extension (31) is triangular or rectangular in shape.
6. A cell casing according to claim 1, wherein: the outer welding extension parts (32) of the two butt joint surfaces (11) are overlapped, and the two outer welding extension parts (32) extend along the direction far away from the shell body (1);
the outer weld extension (32) is located outside the shell body (1).
7. The cell casing of claim 6, wherein: the included angle between the outer welding extension part (32) and the outer wall of the shell body (1) is alpha, and alpha is more than 90 degrees and less than 180 degrees.
8. The cell casing of any of claims 1-7, wherein: the two abutting surfaces (11) are vertically arranged.
9. A battery, characterized by: the method comprises the following steps:
an electric core (4);
a cover plate;
the cell casing of any of claims 1 to 8, the cell (4) being arranged inside the casing body (1), the cover plate covering the opening (13) of the casing body (1).
10. A battery as in claim 9, wherein: the battery cell (4) comprises pole pieces of at least two sizes.
11. A battery module, its characterized in that: comprising a plurality of batteries according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122441508.3U CN216750078U (en) | 2021-10-11 | 2021-10-11 | Battery cell shell, battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122441508.3U CN216750078U (en) | 2021-10-11 | 2021-10-11 | Battery cell shell, battery and battery module |
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| Publication Number | Publication Date |
|---|---|
| CN216750078U true CN216750078U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122441508.3U Active CN216750078U (en) | 2021-10-11 | 2021-10-11 | Battery cell shell, battery and battery module |
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| CN (1) | CN216750078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117374485A (en) * | 2023-12-07 | 2024-01-09 | 蜂巢能源科技股份有限公司 | Battery cell shell, battery cell and battery pack |
-
2021
- 2021-10-11 CN CN202122441508.3U patent/CN216750078U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117374485A (en) * | 2023-12-07 | 2024-01-09 | 蜂巢能源科技股份有限公司 | Battery cell shell, battery cell and battery pack |
| CN117374485B (en) * | 2023-12-07 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Battery cell shell, battery cell and battery pack |
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Address after: Room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Suzhou, Jiangsu 215500 Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: Room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Suzhou, Jiangsu 215500 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |