Battery shell and battery
By designing the recesses and reinforcement structure of the inner wall of the battery case, the existing battery case has solved the problems of large weight, poor heat dissipation and limited space, and achieved lighter, more heat dissipation and higher capacity battery performance.
Patent Information
- Application Number
- CN202421246680.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The shell of the square battery cell of the existing secondary battery is solid structure, resulting in heavier weight, poor internal heat dissipation, and limited internal space, which cannot accommodate more electrolyte, resulting in lower circulation performance.
A battery shell is designed, with several recesses distributed in the inner wall of the shell to accommodate the electrolyte. The depth of the recess is 10%-80% of the thickness of the shell, the inner contour is polygonal or circular, and a reinforcement structure is formed by welding to reduce weight while maintaining support strength.
By reducing the weight of the battery case while maintaining the overall support strength, increasing the contact area between the electrolyte and the case, improving the heat dissipation ability of the battery cell, and accommodating more electrolytes while the external area remains unchanged, improving the cycling performance of the battery cell.
Smart Images
Figure CN223023379U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery cases, and in particular, to a battery case and a battery. Background Art
[0002] The existing case of the square battery cell of the secondary battery is a solid structure, and the main purpose is to provide a certain strength for the battery cell to prevent deformation. However, the solid structure is relatively heavy in terms of weight; the relatively thick thickness causes the heat inside the battery cell to be unable to dissipate effectively, and the relatively thick thickness also results in a relatively limited internal space, making it impossible to accommodate more electrolyte. The battery cell may have insufficient electrolyte in the later stage, resulting in low cycle performance.
[0003] Therefore, how to solve the problems of heavy battery and limited internal space is a technical problem that needs to be solved urgently in this field. Summary of the Utility Model
[0004] The utility model provides a battery case to solve the above problems.
[0005] To achieve the above object, an embodiment of the utility model provides a battery case, including: a case, on the inner wall of which a plurality of concave portions are evenly distributed to accommodate electrolyte; the concave portions are distributed on at least one inner wall of the case; there is a bending portion between two adjacent inner walls, and a flat area is left at the edge of the area formed by the bending portion and the concave portion.
[0006] Further, the depth of the concave portion is 10%-80% of the thickness of the case.
[0007] Further, the inner contour of the concave portion is a polygon or a circle.
[0008] Further, the width of the flat area is 1-3 mm.
[0009] Further, the material of the case is aluminum.
[0010] Further, the adjacent spacing of each concave portion is a rib structure.
[0011] Further, the adjacent outer surfaces of the case are formed with a welding portion by welding.
[0012] The utility model also provides a battery, which is characterized by including: a battery cell and electrolyte; and the battery case as described above.
[0013] Compared with the prior art, the embodiment of the utility model has the following beneficial effects: by converting the solid structure into a case, the weight is reduced while the overall support strength of the case can be maintained; in addition, by providing concave portions, not only the contact area between the electrolyte and the aluminum case is increased to enhance the heat dissipation capacity of the battery cell, but also the battery cell can accommodate more electrolyte without changing the external area, improving the later cycle problem. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0015] Figure 1 is a perspective view of the optimal embodiment of a battery case of the present utility model;
[0016] Figure 2 is a schematic structural view of the inner wall of the present utility model in an unfolded state;
[0017] Figure 3 is a top sectional view of the housing of the present utility model;
[0018] Figure 4 is Figure 3 an enlarged structural view of part A in
[0019] Among them, 100, housing; 200, outer facade; 300, inner wall; 500, recess; 501, reinforcing rib structure; 600, welding part; 700, bending part; 800, flat area; 900, accommodating cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The present utility model will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, and therefore only showing the components related to the present utility model.
[0021] Please refer to Figure 1 , Figure 1 is a perspective view of the optimal embodiment of a battery case of the present utility model. As Figure 1 shown, at least one embodiment provides a battery case, including: a housing 100.
[0022] The material of the housing 100 is aluminum. Specifically, the housing 100 is formed by bending a sheet of aluminum material and then welding the two free ends, that is, the adjacent outer facades 200 of the housing 100 are welded to form a welding part 600.
[0023] Please continue to refer to Figure 1 and in conjunction with Figure 2 and 4 , Figure 2 is a schematic structural view of the inner wall of the present utility model in an unfolded state; Figure 4 is Figure 3 an enlarged structural view of part A in Figure 1 , Figure 2 and Figure 4As shown, a number of recesses 500 are evenly distributed on the inner wall of the housing 100 to accommodate the electrolyte. In the housing 100 of a certain volume, accommodating more electrolyte can enable the battery to have a larger capacity, and in addition, the housing 100 can be lighter. The depth of the recess 500 is 10%-80% of the thickness of the housing 100. The inner contour of the recess 500 is polygonal or circular. The recesses 500 are distributed on at least one inner wall 300 of the housing, that is to say, the recesses 500 can be evenly distributed on one inner wall 300, or can be distributed on two, three or even four inner walls. The adjacent spacing of each recess 500 is a rib structure 501, and the formation of the rib structure 501 is used to maintain the overall load-bearing strength of the housing 100.
[0024] Please continue to refer to Figure 1 and in combination with Figure 2 , Figure 2 , which is a schematic structural diagram of the unfolded state of the inner wall of the present utility model. As shown in Figure 1 and Figure 2 . There is a bending portion 700 between two adjacent inner walls 300. If recesses 500 are provided on both of the two adjacent inner walls 300, then a flat area 800 is left at the edge of the area formed by the bending portion 700 and the recess 500, and no recess 500 is provided on the flat area 800. This is to ensure the thickness near the bending of the housing 100, so that the housing 100 has strong supporting force and also to avoid the housing 100 from breaking when bent. Specifically, the width of the flat area 800 is 1-3 mm.
[0025] Some embodiments also provide a battery, including: an electric core and an electrolyte; and the battery housing as described above.
[0026] In summary, by using a sheet of aluminum material to be bent to form the housing 100, ribs are formed between the recesses 500, converting the solid structure into an aluminum shell, which can reduce the weight while maintaining the overall supporting strength of the housing 100. By providing the recesses 500, not only the contact area between the electrolyte and the aluminum shell is increased to enhance the heat dissipation capacity of the electric core, but also the electric core can accommodate more electrolyte when the external area remains unchanged, improving the later cycle problem.
[0027] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A battery case, characterized in that: include: The housing (100) has a plurality of recesses (500) evenly distributed on its inner wall for containing electrolyte; The recessed portions (500) are distributed on at least one inner wall (300) of the housing; A bending portion (700) is provided between two adjacent inner walls (300), and a plane area (800) is left at the edge of the area formed by the bending portion (700) and the recess (500).
2. The battery case according to claim 1, characterized in that: The depth of the recess (500) is 10%-80% of the thickness of the shell (100).
3. The battery case according to claim 1, wherein: The inner contour of the recess (500) is polygonal or circular.
4. The battery case according to claim 3, characterized in that: The width of the planar area (800) is 1-3 mm.
5. The battery case according to any one of claims 1 to 4, characterized in that: The shell (100) is made of aluminum.
6. The battery case according to claim 5, characterized in that: The adjacent spacing between the recesses (500) is a reinforcing rib structure (501).
7. The battery case according to claim 6, characterized in that: Adjacent exterior facades (200) of the shell (100) are welded to form a welding portion (600).
8. A battery, characterized in that: include: Battery cells and electrolytes; as well as A battery case as claimed in any one of claims 1 to 7.