CN219457803U

CN219457803U - Battery cover

Info

Publication number: CN219457803U
Application number: CN202320247198.8U
Authority: CN
Inventors: 安苏礼; 舒宽金; 贺孝武; 郑旭; 王俊敏; 邓振; 吴雪银
Original assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Current assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-08-01
Anticipated expiration: 2033-02-17

Abstract

The utility model provides a battery cover. The battery cover comprises a cover plate main body, an insulating member and a pole assembly, wherein the cover plate main body is provided with stepped holes penetrating through two opposite surfaces. The insulating member is arranged in the step hole, and the insulating member is provided with mounting holes penetrating through two opposite surfaces. A portion of the pole assembly passes through and is disposed within the mounting hole. The application aims to solve the technical problem that the assembly efficiency of the battery is affected more by the existing battery cover parts, reduce the cost and simplify the assembly of the battery cover.

Description

Battery cover

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover.

Background

In the related art, with the development of new energy, the market demand of lithium ion batteries is increasing. The battery cover is an important part of the battery composition, and in the conventional battery cover design, the battery cover is generally composed of a positive and negative electrode terminal, an upper plastic, a battery cover plate, a pole column, a lower plastic and the like, wherein the positive (negative) electrode terminal and the battery cover plate are separated by the upper plastic, and the positive (negative) pole column and the battery cover plate are separated by the lower plastic. Therefore, parts are more influenced on the assembly efficiency of the battery, and the cost of the battery is increased.

There is a need for a battery cover to solve the above problems.

Disclosure of Invention

The embodiment of the utility model provides a battery cover, which can solve the technical problem that the assembly efficiency of a battery is affected by more parts of the existing battery cover, reduce the cost and simplify the assembly of the battery cover.

An embodiment of the present utility model provides a battery cover including:

the cover plate main body is provided with step holes penetrating through two opposite surfaces;

the insulating member is arranged in the step hole, and is provided with mounting holes penetrating through two opposite surfaces; and

and a pole assembly, a portion of which passes through and is disposed within the mounting hole.

In an embodiment, the step hole comprises an opening, a first groove and a second groove which are communicated in sequence, wherein the groove wall of the first groove is positioned at the outer side of the opening, and the groove wall of the second groove is positioned at the outer side of the groove wall of the first groove;

the battery cover further comprises a limiting member connected to the bottom of the second groove, and the limiting member is abutted to the surface, deviating from the bottom of the first groove, of the insulating member.

In one embodiment, the periphery of the surface of the insulating member, which faces away from the bottom of the first groove, is provided with a containing groove;

the limiting member comprises an annular pressure ring and a limiting block, the limiting block is circumferentially connected to the edge of the annular pressure ring, the limiting block is connected to the bottom of the second groove and is abutted to the outer side wall of the insulating member, and the annular pressure ring is abutted to the bottom of the accommodating groove.

In one embodiment, the battery cover further comprises a sealing member sleeved on the pole assembly and located between the insulating member and the bottom of the first groove.

In an embodiment, the sealing member extends between an outer wall of the pole assembly and an inner wall of the opening.

In an embodiment, the pole assembly comprises a pole body, a sealing ring and a connecting terminal, wherein the connecting terminal is arranged on the insulating member, the pole body is arranged on the insulating member, and part of the pole body penetrates through the mounting hole to be connected with the connecting terminal, and the sealing ring is arranged between the outer wall of the pole body and the hole wall of the mounting hole.

In an embodiment, the pole assembly further comprises a pole bottom plate, the pole bottom plate is provided with a connecting hole penetrating through two opposite surfaces, the pole body is connected with the connecting hole of the pole bottom plate, and the pole bottom plate is connected with the surface of the insulating member, which is away from the connecting terminal.

In an embodiment, the connection terminal is provided with a connection through hole corresponding to the mounting hole, and the pole body passes through the mounting hole and is welded to the connection through hole.

In an embodiment, the electrode post assembly includes a positive electrode post assembly and a negative electrode post assembly, the step hole includes a first step hole and a second step hole, the positive electrode post assembly passes through and is connected to the mounting hole of the insulating member located in the first step hole, and the negative electrode post assembly passes through and is connected to the mounting hole of the insulating member located in the second step hole.

In an embodiment, the battery cover further comprises an explosion-proof valve, the cover plate main body penetrates through pressure relief holes on two opposite surfaces, the pressure relief holes are arranged at intervals with the step holes, and the explosion-proof valve is arranged in the pressure relief holes.

The embodiment of the utility model has the beneficial effects that:

in an embodiment of the utility model, a battery cover includes a cover body, an insulating member, and a post assembly. The cover plate main body is provided with step holes penetrating through two opposite surfaces. The insulating member is arranged in the step hole, the insulating member is provided with a mounting hole penetrating through two opposite surfaces, and a part of the pole assembly penetrates through and is arranged in the mounting hole. Therefore, the battery cover is fixed in the mounting hole of the insulating member through the pole assembly, and the insulating member is fixed in the step hole of the cover plate main body, so that the arrangement of upper plastic and lower plastic in the prior art is omitted, the number of parts of the battery cover can be reduced, the battery cover is assembled more simply, the cost is reduced, and the production efficiency of the battery cover is improved.

Drawings

Fig. 1 is a perspective view of a battery cover provided by an embodiment of the present utility model;

fig. 2 is a perspective view of a battery cover according to another view angle provided by an embodiment of the present utility model;

fig. 3 is an exploded view of a battery cover according to an embodiment of the present utility model;

fig. 4 is a schematic cross-sectional structure of a battery cover provided by an embodiment of the present utility model;

FIG. 5 is an enlarged partial schematic view at A in FIG. 4;

fig. 6 is a schematic view showing an assembly structure of an insulating member and a stopper member of a battery cover according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

The embodiment of the application provides a battery cover 100. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.

Referring to fig. 1 to 3, an embodiment of the present application provides a battery cover 100, the battery cover 100 including a cap plate body 10, an insulating member 20, and a post assembly 30. The cover body 10 is provided with stepped holes 11 penetrating through opposite surfaces. The insulating member 20 is provided in the stepped hole 11, the insulating member 20 is provided with mounting holes 22 penetrating through opposite surfaces, and a portion of the pole assembly 30 is passed through and provided in the mounting holes 22.

Therefore, the pole assembly 30 is fixed in the mounting hole 22 of the insulating member 20, and the insulating member 20 is fixed in the step hole 11 of the cover plate main body 10, so that the arrangement of upper plastic and lower plastic in the prior art is omitted, the number of parts of the battery cover 100 can be reduced, the battery cover 100 is assembled more simply, the cost is reduced, and the production efficiency of the battery cover 100 is improved.

It will be appreciated that the insulating member 20 may be made of a ceramic material or a plastic material, which is inexpensive and provides good insulation. The cover plate main body 10 is also provided with a liquid injection hole 12, and electrolyte is injected into the battery through the liquid injection hole 12. In the thickness direction of the battery cover 100, the cross-sectional area of the liquid injection hole 12 is sequentially increased from bottom to top, so that the liquid injector can conveniently extend into the liquid injection hole 12, the influence of the liquid injection hole 12 on the cover plate main body 10 is reduced, and the structural strength is ensured.

Alternatively, the post assembly 30 includes a positive post assembly 30a and a negative post assembly 30b, the stepped hole 11 includes a first stepped hole 11a and a second stepped hole 11b, the positive post assembly 30a passes through and is connected to the mounting hole 22 of the insulating member 20 located at the first stepped hole 11a, and the negative post assembly 30b passes through and is connected to the mounting hole 22 of the insulating member 20 located at the second stepped hole 11 b. Thus, the positive electrode tab assembly 30a and the negative electrode tab assembly 30b can be separately connected to the insulating member 20, and the battery cover 100 can be assembled more easily. In addition, the first and second stepped holes 11a and 11b may be provided at intervals to effectively avoid interference with each other when the positive and negative electrode tab assemblies 30a and 30b are provided.

Referring to fig. 3 and 4, alternatively, the post assembly 30 includes a post body 31, a sealing ring 32, and a connection terminal 33, the connection terminal 33 is provided on the insulating member 20, the post body 31 is provided on the insulating member 20, and a portion passes through the mounting hole 22 to be connected with the connection terminal 33, and the sealing ring 32 is provided between an outer wall of the post body 31 and a wall of the mounting hole 22. The pole body 31 includes a cylindrical portion 311 and a protruding portion 312 connected to a periphery of the cylindrical portion 311, wherein an extending direction of the protruding portion 312 is perpendicular to an axis of the cylindrical portion 311, and the cylindrical portion 311 and the protruding portion 312 are integrally formed. The seal ring 32 may be fitted over the outer side of the cylindrical portion 311 and may abut against the surface of the protruding portion 312 facing the cylindrical portion 311, and the seal ring 32 may be provided to improve the sealing performance of the mounting hole 22 of the insulating member 20. In addition, the inner wall of the mounting hole 22 may be formed in a stepped structure, so that the contact area between the insulating member 20 and the sealing ring 32 may be further increased to improve the fixing effect on the sealing ring 32. The protruding portion 312 and the connecting terminal 33 are respectively located on two opposite surfaces of the insulating member 20, and after the connecting terminal 33 is connected to the pole body 31 through the mounting hole 22 by the column portion 311, the pole body 31 and the connecting terminal 33 are prevented from being separated from the insulating member 20, so as to ensure the stability of the connection of the pole body 31, the sealing ring 32 and the connecting terminal 33 with the insulating member 20.

Further, the pole assembly 30 further includes a pole bottom plate 34, the pole bottom plate 34 is provided with a connection hole 34a penetrating through two opposite surfaces, the pole body 31 is connected with the connection hole 34a of the pole bottom plate 34, and the pole bottom plate 34 is connected with a surface of the insulating member 20 facing away from the connection terminal 33. The inner wall of the connecting hole 34a may form a step structure, and the outer periphery of the protrusion 312 of the pole body 31 has a step matching with the connecting hole 34a, so that the pole bottom plate 34 and the pole body 31 may be pre-fixed by riveting, and then welded, so that the connection is more stable and reliable. Meanwhile, the pole bottom plate 34 can be abutted against the surface of the insulating member 20, which faces away from the connecting terminal 33, so as to further improve the stability of the insulating member 20 after being mounted.

Referring to fig. 3 and 4, alternatively, the connection terminal 33 is provided with a connection through hole 33a corresponding to the mounting hole 22, and the post body 31 passes through the mounting hole 22 and is welded to the connection through hole 33a. In order to further secure the stability of the connection terminal 33 and the pole body 31, the pole body 31 is passed through the mounting hole 22 and welded to the connection through hole 33a of the connection terminal 33.

Further, the connection terminal 33 includes a terminal body 331 and a metal layer 332, the terminal body 331 is connected to the insulating member 20, the metal layer 332 is disposed on a side of the terminal body 331 facing away from the insulating member 20, the metal layer 332 and the pole body 31 are made of the same metal, and the pole body 31 and the metal layer 332 are welded. Wherein, have stronger joint strength when same metal welds, so through establishing the material of metal layer 332 and utmost point post body 31 to same metal, can reduce the welding degree of difficulty between connecting terminal 33 and the utmost point post body 31 like this, guarantee the welding quality between connecting terminal 33 and the utmost point post body 31, avoid appearing welding defect. It should be noted that, the terminal body 331, the metal layer 332 and the pole body 31 may be made of the same metal material such as aluminum, so as to ensure the stability of the connection between the pole body 31 and the connection terminal 33, and the pole body 31 is a positive electrode. Or the terminal body 331 and the metal layer 332 may be made of different metals, for example, the terminal body 331 is made of aluminum material, the metal layer 332 is made of copper material, i.e. the connection terminal 33 is made of copper-aluminum composite board, and the electrode body 31 is made of copper of the same material as the metal layer 332, so as to ensure the connection stability of the electrode body 31 and the connection terminal 33, and the electrode body 31 is a negative electrode.

Referring to fig. 3 and 4, optionally, the battery cover 100 further includes an explosion-proof valve 60, the cover body 10 penetrates through the pressure release holes 13 of the opposite surfaces, the pressure release holes 13 are spaced apart from the stepped holes 11, and the explosion-proof sheet 61 is disposed in the pressure release holes 13. The cover explosion-proof valve 60 comprises an explosion-proof sheet 61 and a protective film 62, wherein the explosion-proof sheet 61 can be welded with the wall of the pressure relief hole 13, so that the welding strength between the explosion-proof sheet 61 and the wall of the pressure relief hole 13 is facilitated. And a protective film 62 is attached to the cover body 10 and covers the pressure release hole 13 to protect the explosion-proof sheet 61. And through setting up explosion-proof valve 60 on battery cover 100, so when the battery is in the use, when the pressure reaches explosion-proof valve 60's the explosion pressure value in the battery, can directly lead through with outside through explosion-proof valve 60 and pressure release hole 13, the quick bleeder to avoid the inflation explosion of battery, improve the security performance of battery.

Referring to fig. 4 to 6, alternatively, the stepped hole 11 includes an opening 111, a first groove 112, and a second groove 113 that communicate in this order, the groove wall of the first groove 112 being located outside the opening 111, the groove wall of the second groove 113 being located outside the groove wall of the first groove 112. The insulating member 20 is connected to the bottom of the first groove 112, the battery cover 100 further includes a limiting member 40, the limiting member 40 is connected to the bottom of the second groove 113, and the limiting member 40 abuts against a surface of the insulating member 20 facing away from the bottom of the first groove 112.

It will be appreciated that the shape of the insulating member 20 may be the same as the shape of the notch of the first slot 112, such that by placing the insulating member 20 on the bottom of the first slot 112, the outer wall of the insulating member 20 may abut against the wall of the first slot 112, i.e. the first slot 112 provides a limiting effect on the pre-fixing of the insulating member 20, avoiding a positional shift of the insulating member 20. And then, the limiting member 40 is placed at the bottom of the second groove 113 and then is connected and fixed in a welding mode, so that the limiting member 40 is abutted against the surface of the insulating member 20, which is away from the bottom of the first groove 112, and the insulating member 20 is completely fixed, so that the stability of the insulating member 20 after connection is ensured. Further, the shape of the limiting member 40 may be the same as the shape of the notch of the second groove 113, that is, the limiting member 40 is placed on the bottom of the second groove 113, the outer wall of the limiting member 40 may abut against the groove wall of the second groove 113, so as to avoid the position deviation of the limiting member 40, and facilitate the welding and fixing of the subsequent limiting member 40 and the cover main body 10.

Referring to fig. 4 to 6, the insulating member 20 is optionally provided with a receiving groove 21 at a surface periphery facing away from the groove bottom of the first groove 112. The limiting member 40 includes an annular pressing ring 41 and a limiting block 42, the limiting block 42 is circumferentially connected to the edge of the annular pressing ring 41, the limiting block 42 is connected to the bottom of the second groove 113 and abuts against the outer side wall of the insulating member 20, and the annular pressing ring 41 abuts against the bottom of the accommodating groove 21.

The annular compression ring 41 and the limiting block 42 may be integrally formed, so as to ensure structural strength of the integral structure of the limiting member 40, and further ensure stability of the abutting insulating member 20. Meanwhile, the accommodating groove 21 is formed on the periphery of the surface of the insulating member 20, and the annular pressing ring 41 circumferentially abuts against the groove bottom of the accommodating groove 21, so that the contact area between the insulating member 20 and the limiting member 40 is increased, and the abutting stability is further improved. Further, the inner ring side of the annular pressing ring 41 may also abut against the groove sidewall of the accommodating groove 21, so as to further increase the contact area. In addition, the stopper 42 may also contact with the groove sidewall of the second groove 113, so that the stopper 42 is just embedded in the gap between the outer sidewall of the insulating member 20 and the groove sidewall of the second groove 113 to perform the limitation, and then the stopper 42 and the cover plate may be welded to the groove sidewall of the second groove 113 by welding, so as to ensure the stability of the stopper 42 after connection.

Optionally, the battery cover 100 further includes a sealing member 50, where the sealing member 50 is sleeved on the pole assembly 30 and located between the insulating member 20 and the bottom of the first groove 112. The sealing member 50 may be made of an elastic material such as rubber. The insulating member 20 and the bottom of the first groove 112 are sealed by providing the sealing member 50 to avoid the presence of a weeping gap in the battery cover 100.

Further, the sealing member 50 extends between the outer wall of the pole assembly 30 and the inner wall of the opening 111. By extending the sealing member 50 between the outer wall of the pole assembly 30 and the inner wall of the opening 111, the sealing effect of the sealing member 50 can be further improved, and short circuit caused by contact between the pole assembly 30 and the cover body 10 during assembly can be avoided when the cover body 10 is made of metal.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A battery cover, comprising:

2. The battery cover according to claim 1, wherein the stepped hole includes an opening, a first groove, and a second groove that are sequentially communicated, a groove wall of the first groove being located outside the opening, a groove wall of the second groove being located outside a groove wall of the first groove;

3. The battery cover according to claim 2, wherein a surface periphery of the insulating member facing away from a bottom of the first groove is provided with a receiving groove;

4. The battery cover of claim 2, further comprising a sealing member that is nested within the post assembly and is positioned between the insulating member and a bottom of the first slot.

5. The battery cover of claim 4, wherein the sealing member extends between an outer wall of the terminal assembly and an inner wall of the opening.

6. The battery cover according to any one of claims 1 to 5, wherein the post assembly includes a post body, a seal ring, and a connection terminal, the connection terminal is provided on the insulating member, the post body is provided on the insulating member, and is connected to the connection terminal partially through the mounting hole, and the seal ring is provided between an outer wall of the post body and a wall of the mounting hole.

7. The battery cover of claim 6, wherein the post assembly further comprises a post base plate provided with connection holes penetrating through opposite surfaces, the post body is connected with the connection holes of the post base plate, and the post base plate is connected with a surface of the insulating member facing away from the connection terminals.

8. The battery cover according to claim 6, wherein the connection terminal is provided with a connection through hole corresponding to the mounting hole, and the post body passes through the mounting hole and is welded to the connection through hole.

9. The battery cover according to any one of claims 1 to 5, wherein the post assembly includes a positive post assembly and a negative post assembly, the stepped hole includes a first stepped hole and a second stepped hole, the positive post assembly passes through and is connected to a mounting hole of an insulating member located in the first stepped hole, and the negative post assembly passes through and is connected to a mounting hole of an insulating member located in the second stepped hole.

10. The battery cover of any one of claims 1 to 5, further comprising an explosion-proof valve, wherein the cover plate body extends through pressure relief holes in opposite surfaces, the pressure relief holes being spaced apart from the stepped holes, and the explosion-proof valve being disposed in the pressure relief holes.