Battery monomer and battery

Abstract

The single battery comprises a shell, an anti-explosion valve and a reinforcing rib, a through hole and an annular bulge surrounding the through hole are arranged on the side wall of the shell, and a mounting groove is formed by the annular bulge and the side wall; the anti-explosion valve is positioned in the mounting groove and is opposite to the through hole; the reinforcing ribs are located in the through holes and connected to the shell. According to the battery monomer disclosed by the utility model, the mounting groove is formed in the side wall of the shell, the through hole is formed in the mounting groove, the explosion-proof valve is positioned in the mounting groove and is opposite to the through hole, the reinforcing rib is positioned in the through hole and is connected to the shell, and the reinforcing rib is used for connecting the shell in the explosion-proof valve region and improving the rigidity of the shell in the explosion-proof valve region; the possibility of deformation of the shell in the anti-explosion valve area is reduced, the stress of the anti-explosion valve is further reduced, and the safety of the single battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cell and a battery. Background Technology

[0002] In related technologies, the explosion-proof valve of a battery cell is used to release high-temperature gases from the cell to ensure the safety of the battery cell. The explosion-proof valve and the housing are welded together as a whole. Considering the opening of the explosion-proof valve, its local structure is designed with weak areas of V or U-shaped cross-section. Under the conditions of battery charging and discharging, the cell will expand, causing the middle of the housing to bulge outward. The explosion-proof valve will be subjected to the tensile force caused by the expansion, which may cause the explosion-proof valve to open prematurely. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a battery cell with reinforcing ribs for connecting the housing of the explosion-proof valve area. This increases the rigidity of the housing in the explosion-proof valve area, reduces the possibility of deformation, further reduces the stress on the explosion-proof valve, and improves the safety of the battery cell.

[0004] This utility model also proposes a battery having the above-mentioned battery cells.

[0005] A battery cell according to a first aspect of the present invention includes: a housing, wherein a through hole and an annular protrusion surrounding the through hole are provided on the side wall of the housing, the annular protrusion protruding outward toward the outside of the housing, and the annular protrusion and the side wall forming a mounting groove; an explosion-proof valve, wherein the explosion-proof valve is located in the mounting groove and is disposed opposite to the through hole; and a reinforcing rib, wherein the reinforcing rib is located in the through hole and connected to the housing.

[0006] According to an embodiment of the present invention, the battery cell has a mounting groove on the side wall of the housing, a through hole in the mounting groove, an explosion-proof valve located in the mounting groove and opposite to the through hole, a reinforcing rib located in the through hole and connected to the housing, the reinforcing rib being used to connect the housing in the explosion-proof valve area, thereby increasing the rigidity of the housing in the explosion-proof valve area, reducing the possibility of deformation of the housing in the explosion-proof valve area, further reducing the stress on the explosion-proof valve, and improving the safety of the battery cell.

[0007] According to some embodiments of the present invention, the reinforcing rib includes a plurality of first ribs, the plurality of reinforcing ribs extending along a first direction and spaced apart along a second direction, the first direction being perpendicular to the second direction.

[0008] According to some embodiments of the present invention, the reinforcing rib further includes a plurality of second ribs, the second ribs being connected between two adjacent first ribs and between the first ribs and the shell.

[0009] According to some embodiments of the present invention, the second rib extends along the second direction.

[0010] According to some embodiments of the present invention, the included angle A between the first rib and the second rib satisfies: 30°≤A≤60°.

[0011] According to some embodiments of the present invention, the extension directions of two adjacent second ribs are set at an angle.

[0012] According to some embodiments of the present invention, the reinforcing ribs are provided in two sets, the two sets of reinforcing ribs are spaced apart along a third direction, one set of reinforcing ribs is connected to the outer surface of the mounting groove, and the other set of reinforcing ribs is connected to the inner surface of the shell. The first rib of one set of reinforcing ribs and the first rib of the other set of reinforcing ribs are staggered along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0013] According to some embodiments of the present invention, the dimension of the first rib in the second direction is B, and the dimension of the through hole in the second direction is C, which satisfies: 2%C≤B≤5%C.

[0014] According to some embodiments of the present invention, the dimension of the first rib in the second direction is B, and the distance between two adjacent first ribs in the second direction is E, satisfying: 40%E≤B≤55%E.

[0015] The battery according to a second aspect of the present invention includes: a battery cell according to the first aspect of the present invention described above.

[0016] According to the battery of this utility model embodiment, by setting the above-mentioned battery cells, the rigidity of the explosion-proof valve area housing is improved, the possibility of deformation of the explosion-proof valve area housing is reduced, the stress on the explosion-proof valve is further reduced, the safety of the battery cells is improved, and thus the safety of the battery is improved.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the housing and explosion-proof valve in cooperation according to the first aspect embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Sectional view at point AA along the middle;

[0021] Figure 3 This is a schematic diagram of the housing according to the first aspect of the present invention;

[0022] Figure 4 yes Figure 3 Cross-sectional view at the middle edge BB;

[0023] Figure 5 This is a schematic diagram of the housing according to a second aspect embodiment of the present utility model;

[0024] Figure 6 yes Figure 5 Sectional view at the center CC;

[0025] Figure 7 This is a schematic diagram of the housing according to a third aspect embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the housing according to the fourth aspect embodiment of the present utility model;

[0027] Figure 9 yes Figure 8 Sectional view at the middle DD;

[0028] Figure 10 This is a schematic diagram of the housing according to the fifth aspect embodiment of the present utility model;

[0029] Figure 11 yes Figure 10 Sectional view at the center of EE;

[0030] Figure 12 This is a schematic diagram of the housing according to the sixth aspect embodiment of the present utility model;

[0031] Figure 13 yes Figure 12 Sectional view at the center FF.

[0032] Figure label:

[0033] 10. Housing; 11. Side wall; 12. Mounting groove; 13. Annular protrusion; 14. Through hole;

[0034] 20. Explosion-proof valve; 21. Mounting part; 22. Explosion-proof part; 23. Pressure relief groove;

[0035] 30. Reinforcing rib; 31. First reinforcing rib; 32. Second reinforcing rib. Detailed Implementation

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] The following is for reference. Figures 1-13 This describes a battery cell according to an embodiment of the present invention.

[0040] According to the first aspect of the present invention, the battery cell includes a housing 10 and an explosion-proof valve 20. The side wall 11 of the housing 10 is provided with a through hole 14 and an annular protrusion 13 surrounding the through hole 14. The annular protrusion 13 protrudes outward toward the outside of the housing 10, that is, the outer surface of the annular protrusion 13 is higher than the outer surface of the housing 10. The explosion-proof valve 20 is located in the mounting groove 12 and is disposed opposite to the through hole 14. The explosion-proof valve 20 includes an explosion-proof part 22 and a mounting part 21 that is connected around the outer periphery of the explosion-proof part 22. The mounting part 21 is fixedly connected to the bottom plate and the side plate of the mounting groove 12. The explosion-proof part 22 is provided with a pressure relief groove 23, which is disposed opposite to the through hole 14.

[0041] When a battery cell experiences thermal runaway, the high-temperature gas inside the battery cell impacts the explosion-proof valve 20 through the through-hole 14. When the internal pressure of the battery cell is too high, the pressure relief groove 23 of the explosion-proof valve 20 cracks, and the high-temperature gas inside the battery cell can be released through the crack to improve the safety of the battery cell.

[0042] The battery cell also includes a reinforcing rib 30, which is located inside the through hole 14 and connected to the housing 10. The reinforcing rib 30 is used to pull the housing 10 around the through hole 14, thereby increasing the rigidity of the housing 10 at the through hole 14, reducing the possibility of deformation of the housing 10 at the through hole 14, further reducing the force on the explosion-proof valve 20, and improving the safety of the battery cell.

[0043] For example, multiple reinforcing ribs 30 can be provided, and the multiple reinforcing ribs 30 can be arranged at intervals at the through hole 14, with space between two adjacent reinforcing ribs 30, so that high-temperature gas can be discharged to the explosion-proof valve 20 through the through hole 14.

[0044] According to the battery cell of this utility model embodiment, a mounting groove 12 is provided on the side wall 11 of the housing 10, and a through hole 14 is provided in the mounting groove 12. The explosion-proof valve 20 is located in the mounting groove 12 and is arranged opposite to the through hole 14. The reinforcing rib 30 is located in the through hole 14 and connected to the housing 10. The reinforcing rib 30 is used to connect the housing 10 in the area of ​​the explosion-proof valve 20, thereby increasing the rigidity of the housing 10 in the area of ​​the explosion-proof valve 20, reducing the possibility of deformation of the housing 10 in the area of ​​the explosion-proof valve 20, further reducing the stress on the explosion-proof valve 20, and improving the safety of the battery cell.

[0045] According to some embodiments of the first aspect of this utility model, referring to Figure 1-Figure 4 The reinforcing rib 30 includes multiple first reinforcing ribs 31, and all the multiple reinforcing ribs 30 are along a first direction (see attached diagram). Figure 1 Extending in the e1 direction and along the second direction (see Appendix) Figure 1 The first direction is perpendicular to the second direction. Multiple first ribs 31 are arranged in the through hole 14, and the multiple first ribs 31 extend along the first direction. The multiple first ribs 31 can connect to the housing 10 of the explosion-proof valve 20 area in the first direction, which can increase the connection strength of the housing 10 in the first direction and prevent the housing 10 from deforming in the first direction.

[0046] The first reinforcing rib 31 is simple to process, and the extension direction of the first reinforcing rib 30 is consistent with the expansion direction of the battery cell, which helps to improve the rigidity of the explosion-proof valve 20 area and reduce the risk of deformation and cracking in the weak areas of the explosion-proof valve 20.

[0047] For example, the through hole 14 can be an oblong hole, with the first direction being the width direction of the oblong hole and the second direction being the length direction of the oblong hole.

[0048] According to some embodiments of the second aspect of this utility model, referring to Figures 5-12 The reinforcing rib 30 also includes a plurality of second ribs 32. The second ribs 32 are connected between two adjacent first ribs 31 and between the first ribs 31 and the housing 10. The second ribs 32 can also connect the housing 10 of the explosion-proof valve 20 area in the second direction, which can increase the connection strength of the housing 10 in the second direction and prevent the housing 10 from deforming in the second direction.

[0049] Under the combined action of the first rib 31 and the second rib 32, the shell 10 on the outer periphery of the through hole 14 can be connected in the first direction and the second direction.

[0050] According to some embodiments of the third aspect of this utility model, referring to Figures 5-6 The second rib 32 extends along the second direction, and the angle between the first rib 31 and the second rib 32 is a right angle, which facilitates the processing and manufacturing of the reinforcing rib 30.

[0051] According to some embodiments of the fourth aspect of this utility model, referring to Figure 7 , Figures 10-13 The included angle between the first rib 31 and the second rib 32 is A, which satisfies: 30°≤A≤60°. The second rib 32 extends obliquely in the second direction. The second rib 32 can also provide force to the housing 10 of the explosion-proof valve 20 area in the first direction, further increasing the strength of the housing 10 of the explosion-proof valve 20 area.

[0052] For example, the included angle between the first rib 31 and the second rib 32 can be 30°, 45°, 50° or 60°.

[0053] Reference Figure 7 One end of the first rib 31 can be connected to the shell 10, and the other end can be connected to one end of the second rib 32. The other end of the second rib 32 is connected to another second rib 32. The first rib 31 and the second rib 32 are arranged in a mesh.

[0054] According to some embodiments of the fifth aspect of this utility model, referring to Figure 7 , Figures 10-13 The extension directions of two adjacent second ribs 32 are set at an angle, that is, the two adjacent second ribs 32 are not set parallel, and the included angle between the two second ribs 32 adjacent to the first rib 31 can be a right angle. The two adjacent second ribs 32 can pull the first rib 31 in the same direction from both sides of the first rib 31 at the same position.

[0055] According to some embodiments of the present invention, referring to Figures 8-13The reinforcing rib 30 is provided in two sets, with the two sets of reinforcing ribs 30 along the third direction (see attached). Figure 1 In the e3 direction, the reinforcing ribs are spaced apart. One set of reinforcing ribs 30 are all connected to the outer surface of the mounting groove 12. The outer surface of the mounting groove 12 is the surface away from the center of the mounting groove 12. The other set of reinforcing ribs 30 are all connected to the inner surface of the shell 10. The inner surface of the shell 10 is the surface close to the center of the shell 10. The first rib 31 of one set of reinforcing ribs 30 and the first rib 31 of the other set of reinforcing ribs 30 are staggered along the second direction. The first direction, the second direction and the third direction are perpendicular to each other.

[0056] The outer surface of the mounting groove 12 and the inner surface of the housing 10 are spaced apart in a third direction. One set of reinforcing ribs 30 is used to strengthen the structural strength of the bottom surface of the mounting groove 12, and another set of reinforcing ribs 30 is used to increase the structural strength of the inner surface of the housing 10, thereby significantly improving the rigidity of the housing 10 in the explosion-proof valve 20 area, reducing the deformation of the housing 10 in the explosion-proof valve 20 area, further reducing the stress on the explosion-proof valve 20, and improving safety. Furthermore, the first rib 31 of one set of reinforcing ribs 30 and the first rib 31 of the other set of reinforcing ribs 30 are staggered along a second direction, which facilitates the discharge of high-temperature gas from the battery cell.

[0057] According to some embodiments of the present invention, referring to Figures 3-13 The first rib 31 has a dimension B in the second direction, and the through hole 14 has a dimension C in the second direction, satisfying the condition: 2%C≤B≤5%C. The first rib 31 meeting this range ensures its structural strength. For example, the first rib 31 can be 2%, 3%, 4%, or 5% of the through hole 14 in the second direction.

[0058] According to some embodiments of the present invention, referring to Figures 3-13 The dimension of the first rib 31 in the second direction is B, and the distance between two adjacent first ribs 31 in the second direction is E, satisfying: 40%E≤B≤55%E. The distance between two adjacent first ribs 31 in the second direction satisfies this range, which ensures that the number of first ribs 31 arranged at the through hole 14 is neither too few nor too many, so that the first ribs 31 can better increase the structural strength of the shell 10 in the explosion-proof valve 20 area.

[0059] For example, the size of the first rib 31 is 40%, 45%, 50%, or 55% of the distance between two adjacent first ribs 31.

[0060] The battery according to a second aspect of the present invention includes: a battery cell according to the first aspect of the present invention described above.

[0061] According to the battery of this utility model embodiment, by setting the above-mentioned battery cell, the rigidity of the housing 10 in the explosion-proof valve 20 area is improved, the possibility of deformation of the housing 10 in the explosion-proof valve 20 area is reduced, the stress on the explosion-proof valve 20 is further reduced, the safety of the battery cell is improved, and thus the safety of the battery is improved.

[0062] Throughout this specification, references to terms such as "some embodiments," "optionally," "further," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell, characterized in that, include: The housing has a through hole and an annular protrusion around the through hole on its side wall. The annular protrusion protrudes outward from the side wall and forms a mounting groove with the side wall. An explosion-proof valve, wherein the explosion-proof valve is located in the mounting groove and is disposed opposite to the through hole; A reinforcing rib is located within the through hole and connected to the housing.

2. The battery cell according to claim 1, characterized in that, The reinforcing rib includes a plurality of first ribs, which extend along a first direction and are spaced apart along a second direction, wherein the first direction is perpendicular to the second direction.

3. The battery cell according to claim 2, characterized in that, The reinforcing rib also includes a plurality of second ribs, which are connected between two adjacent first ribs and between the first ribs and the shell.

4. The battery cell according to claim 3, characterized in that, The second rib extends along the second direction.

5. The battery cell according to claim 3, characterized in that, The included angle A between the first rib and the second rib satisfies: 30°≤A≤60°.

6. The battery cell according to claim 5, characterized in that, The extension directions of two adjacent second reinforcing bars are set at an angle.

7. The battery cell according to any one of claims 2-6, characterized in that, The reinforcing ribs are provided in two sets, which are spaced apart along a third direction. One set of reinforcing ribs is connected to the outer surface of the mounting groove, and the other set of reinforcing ribs is connected to the inner surface of the housing. The first ribs of one set of reinforcing ribs and the first ribs of the other set of reinforcing ribs are staggered along the second direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

8. The battery cell according to any one of claims 2-6, characterized in that, The dimension of the first rib in the second direction is B, and the dimension of the through hole in the second direction is C, satisfying: 2%C≤B≤5%C.

9. The battery cell according to any one of claims 2-6, characterized in that, The dimension of the first rib in the second direction is B, and the distance between two adjacent first ribs in the second direction is E, satisfying: 40%E≤B≤55%E.

10. A battery, characterized in that, include: The battery cell according to any one of claims 1-9.

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