CN220774582U - Square battery shell and square battery - Google Patents
Square battery shell and square battery Download PDFInfo
- Publication number
- CN220774582U CN220774582U CN202322101077.5U CN202322101077U CN220774582U CN 220774582 U CN220774582 U CN 220774582U CN 202322101077 U CN202322101077 U CN 202322101077U CN 220774582 U CN220774582 U CN 220774582U
- Authority
- CN
- China
- Prior art keywords
- shell
- frame
- cover plate
- prismatic battery
- square battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a square battery shell and a square battery, wherein the square battery shell comprises a shell and a cover plate, and the shell is of a semi-closed structure with one end open; the shell comprises a frame, a bottom surface piece and side surface pieces, wherein the bottom surface piece is arranged at one end of the frame, the side surface pieces are arranged on the outer peripheral surface of the frame, the side surface pieces are arranged around the bottom surface piece in a surrounding mode, and the side surface pieces are at least one layer of soft film; the cover plate closes the opening of the shell and is connected with one end of the frame away from the bottom surface piece. The square battery shell solves the problem that pressure cannot be applied to the shell when the existing aluminum shell battery is formed.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a square battery shell and a square battery.
Background
With the continuous expansion of new energy industry, lithium ion batteries are widely used as an important component of new energy industry. The square aluminum shell lithium ion battery is widely applied to the fields of power and energy storage batteries because of simple structure, higher energy density and high safety performance. However, the existing aluminum shell structure is limited, pressure cannot be applied to the shell during formation of the battery cell, formation charging current cannot be set too large, and the problem of core swelling can be caused due to untimely gas production and discharge due to too large charging current, so that lithium ion intercalation is affected, lithium precipitation is caused, and the performance of the battery cell is affected. Even if the aluminum shell battery cell is charged by adopting small current, the corner of the winding core is generally in the problem of black spots due to no external pressure, i.e. lithium ions are not embedded, and the performance of the battery cell is affected.
Disclosure of Invention
The utility model provides a square battery shell and a square battery, aiming at the problem that pressure cannot be applied to a shell when the existing aluminum-shell battery is formed.
In one aspect, the utility model provides a square battery shell, which comprises a shell and a cover plate, wherein the shell is of a semi-closed structure with one end open; the shell comprises a frame, a bottom surface piece and side surface pieces, wherein the bottom surface piece is arranged at one end of the frame, the side surface pieces are arranged on the outer peripheral surface of the frame, the side surface pieces are arranged around the bottom surface piece in a surrounding mode, and the side surface pieces are at least one layer of soft film; the cover plate closes the opening of the shell and is connected with one end of the frame away from the bottom surface piece.
Optionally, the frame is formed by connecting a plurality of supporting pieces, the side pieces comprise four side faces, and edges between two adjacent side faces are connected through the supporting pieces.
Optionally, the cross section of the support is circular, sector-shaped, triangular, rectangular or square.
Optionally, the support is a metal support.
Optionally, the flexible membrane is a breathable barrier membrane.
Alternatively, the breathable barrier film has a thickness of 5-300 μm.
Optionally, the bottom surface member is a metal plate, and the metal plate is welded with the frame.
Optionally, the cover plate comprises a cover plate body and a polar post, the cover plate body is connected with one end of the frame far away from the bottom surface piece, a mounting hole and a liquid injection hole are formed in the cover plate body, and the liquid injection hole is formed in one side of the mounting hole; the pole is arranged in the mounting hole and is in insulating connection with the cover plate body.
Optionally, a positioning hole is formed in the pole.
On the other hand, the utility model also provides a square battery, which comprises the directional battery shell.
According to the utility model, the structural strength of the shell is ensured by arranging the frame, the peripheral surface of the frame is covered by arranging the side surface parts, the side surface parts are soft films, and the shell structure can apply pressure to the shell during cell formation by using the side surface parts made of soft materials, so that the pressurization formation is realized, the formation charging current is increased, the formation time is shortened, and the problem of black spots at corners of the rolled core pole piece is solved.
Drawings
Fig. 1 is a schematic structural view of a square battery case according to an embodiment of the present utility model;
FIG. 2 is a schematic top view of a prismatic battery case according to an embodiment of the present utility model;
fig. 3 is a schematic structural view of a frame of a square battery case according to an embodiment of the present utility model.
Reference numerals in the drawings of the specification are as follows:
1. a cover plate; 11. a cover plate body; 12. a pole; 121. positioning holes; 13. a liquid injection hole;
2. a frame; 21. a support;
3. side members.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In order to illustrate the technical scheme of the utility model, the following description is made by specific examples.
In one aspect, as shown in fig. 1 to 3, a square battery case according to an embodiment of the present utility model includes a case and a cover plate 1, wherein the case is a semi-closed structure with one end open; the shell comprises a frame 2, a bottom part (not shown in the figure) and a side part 3, wherein the bottom part is arranged at one end of the frame 2, the side part 3 is arranged on the outer peripheral surface of the frame 2, the side part 3 is arranged around the bottom part in a surrounding manner, and the side part 3 is at least one layer of soft film. The cover plate 1 closes the opening of the housing and is connected to the end of the frame 2 remote from the bottom part. Specifically, the flexible film is connected with the frame 2 by means of heat fusion or plastic packaging.
In the embodiment of the utility model, the structural strength of the shell is ensured by arranging the frame 2, the peripheral surface of the frame 2 is covered by arranging the side piece 3, the side piece 3 is a soft film, and the side piece 3 made of soft materials is used, so that the shell structure can apply pressure to the shell during the formation of the battery core, realize the pressurization formation, increase the formation charging current, shorten the formation time and improve the problem of black spots at the corners of the pole piece of the winding core.
In some embodiments of the utility model, as shown in fig. 3, the frame 2 is formed by connecting a plurality of support members 21, the side members 3 comprise four sides, and edges between two adjacent sides are connected by the support members 21. By providing the support 21 at the edge between two adjacent sides, the structural strength of the housing is ensured.
Here, the frame 2 may be integrally provided, or may be a rectangular parallelepiped frame structure formed by connecting a plurality of supporting members 21. The support 21 can also be arranged between the side areas, i.e. the two edges of the side, for support, which enhances the structural strength of the housing.
In some embodiments of the utility model, the support 21 has a cross-section that is circular, sector-shaped, triangular, rectangular or square.
It should be noted that the cross section of the supporting member 21 may be of other irregular shapes, and is not limited to a circle, a sector, a triangle, a rectangle, or a square.
In some embodiments of the utility model, the support 21 is a metal support, ensuring the strength of the frame 2, while facilitating the welding with the cover plate 1.
In some embodiments of the utility model, the flexible membrane is a breathable membrane that facilitates venting of gases while insulating liquids.
In some embodiments of the utility model, the breathable barrier film has a thickness of 5-300 μm.
In some embodiments of the present utility model, the bottom surface member is a metal plate welded to the frame 2, further enhancing the structural strength of the frame 2.
As shown in fig. 1, in some embodiments of the present utility model, the cover 1 includes a cover body 11 and a post 12, the cover body 11 is connected to an end of the frame 2 away from the bottom member, a mounting hole (not shown) and a liquid injection hole 13 are provided on the cover body 11, and the liquid injection hole 13 is provided on one side of the mounting hole. The pole 12 is disposed in the mounting hole and is connected with the cover plate body 11 in an insulating manner. Specifically, the cover plate body 11 is welded with the frame 2, and an insulating sealing member is arranged between the pole 12 and the cover plate body 11, and the insulating sealing member can be made of PP material.
As shown in fig. 1, in some embodiments of the present utility model, the pole 12 is provided with a positioning hole 121, so as to facilitate positioning during subsequent pin angle welding.
On the other hand, an embodiment of the present utility model further provides a prismatic battery, including the directional battery case according to any one of the above embodiments.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents. Such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (10)
1. The square battery shell is characterized by comprising a shell and a cover plate, wherein the shell is of a semi-closed structure with one end open; the shell comprises a frame, a bottom surface piece and side surface pieces, wherein the bottom surface piece is arranged at one end of the frame, the side surface pieces are arranged on the outer peripheral surface of the frame, the side surface pieces are arranged around the bottom surface piece in a surrounding mode, and the side surface pieces are at least one layer of soft film; the cover plate closes the opening of the shell and is connected with one end of the frame away from the bottom surface piece.
2. The prismatic battery case according to claim 1, wherein said frame is formed by a plurality of support members, said side members comprising four sides, adjacent edges between two of said sides being connected by said support members.
3. The prismatic battery housing according to claim 2, wherein the support member has a cross section of a circle, a sector, a triangle, a rectangle or a square.
4. The prismatic battery housing according to claim 2, wherein said support is a metal support.
5. The prismatic battery housing according to claim 1, wherein said flexible membrane is a gas permeable membrane.
6. The prismatic battery housing according to claim 5, wherein the thickness of said gas permeable membrane is between 5 and 300 μm.
7. The prismatic battery housing according to claim 1, wherein said bottom member is a metal plate welded to said frame.
8. The square battery shell according to claim 1, wherein the cover plate comprises a cover plate body and a pole, the cover plate body is connected with one end of the frame far away from the bottom surface piece, a mounting hole and a liquid injection hole are formed in the cover plate body, and the liquid injection hole is formed in one side of the mounting hole; the pole is arranged in the mounting hole and is in insulating connection with the cover plate body.
9. The prismatic battery case according to claim 8, wherein the post is provided with a positioning hole.
10. A prismatic battery comprising a prismatic battery casing according to any of the claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322101077.5U CN220774582U (en) | 2023-08-04 | 2023-08-04 | Square battery shell and square battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322101077.5U CN220774582U (en) | 2023-08-04 | 2023-08-04 | Square battery shell and square battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220774582U true CN220774582U (en) | 2024-04-12 |
Family
ID=90605421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322101077.5U Active CN220774582U (en) | 2023-08-04 | 2023-08-04 | Square battery shell and square battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220774582U (en) |
-
2023
- 2023-08-04 CN CN202322101077.5U patent/CN220774582U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |