CN219937197U - Battery and top cap subassembly thereof - Google Patents

Abstract

The utility model discloses a battery and a top cap assembly thereof. The battery includes a housing. The battery also comprises a first top cover and a second top cover, wherein the first top cover is fixedly connected with the second top cover, at least one of the second top cover and the first top cover is fixedly connected with the shell, the second top cover, the first top cover and the shell are jointly enclosed to form a containing cavity, and the battery also comprises an electric core which is contained in the containing cavity. The battery also comprises a pole, the pole penetrates through the first top cover, and the pole is electrically connected with the battery core. Through the mode, the convenience in assembling the top cover can be improved.

Description

Battery and top cap subassembly thereof

Technical Field

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

Background

In order to relieve the pressure of the traditional automobile industry on energy and environment, new energy automobile industry plans are sequentially proposed and developed in various countries in the world, and the battery technology is one of key technologies for restricting the development of new energy electric automobiles. Based on the self-constitution characteristics of the battery and the specificity of the application occasion, strict requirements are put on the energy density, the power performance and the safety performance of the battery.

The battery typically includes a housing and a top cover, with the housing and top cover interfacing to form a cavity for receiving the battery cells. However, current caps are typically of unitary design. After the connecting sheet and the lug of the battery are welded, the pole column and the connecting sheet on the integral top cover are inconvenient to weld, which means that the convenience of assembling the integral top cover is poor.

Disclosure of Invention

The utility model provides a battery and a top cover assembly thereof, which can improve convenience in assembling a top cover.

The utility model provides a battery. The battery includes a housing. The first top cover, the second top cover and the first top cover are fixedly connected, at least one of the second top cover and the first top cover is fixedly connected with the shell, and the second top cover, the first top cover and the shell jointly enclose a containing cavity; the battery also comprises a battery core, and the battery core is accommodated in the accommodating cavity. The battery also comprises a pole, the pole penetrates through the first top cover, and the pole is electrically connected with the battery core.

In one embodiment of the utility model, the first top cover, the second top cover has a first direction and a second direction intersecting each other, and further has a reference plane perpendicular to the first direction; the battery further includes: the connecting piece comprises a first connecting part and a second connecting part which are connected with each other, the first connecting part is electrically connected with the battery cell, and the second connecting part is electrically connected with the pole; the first top cover is provided with a first orthographic projection on a reference plane, the first connecting part is provided with a second orthographic projection on the reference plane, and at least part of the second orthographic projection is located outside the first orthographic projection.

In an embodiment of the present utility model, the second direction includes a length direction and a thickness direction perpendicular to each other; the battery also comprises a first insulating piece, wherein the opposite sides of the first insulating piece in the first direction are a first side and a second side respectively, and the first side faces the first top cover and the second top cover; the first insulating piece comprises a first insulating part and a second insulating part, the first insulating part is arranged along the length direction, the first insulating part is clamped between the first top cover and the pole, and at least part of the second insulating part is provided with a gap between the thickness direction and the inner side wall of the accommodating cavity; the battery cell comprises a battery cell main body and a pole lug which are connected, and the battery cell main body is positioned at the second side; the tab and the first connecting portion extend from the gap to the first side for electrical connection, and the tab and the first connecting portion are arranged towards the second side in a side turning manner.

In an embodiment of the utility model, the front projection of the first connection portion on the reference plane is at least partially located in the front projection of the gap on the reference plane.

In an embodiment of the utility model, the second top cover is provided with a mounting hole, and the first top cover is embedded in the mounting hole.

In an embodiment of the utility model, the first top cover comprises a first sub-part and a second sub-part, the first sub-part is positioned at one side of the second sub-part away from the battery core, the second sub-part is provided with a first connecting surface facing away from the battery core, and the first connecting surface is annularly arranged at the periphery of the first sub-part; the mounting hole comprises a first sub-hole and a second sub-hole which are communicated with each other, the first sub-hole is far away from the battery cell relative to the second sub-hole, and a second connecting surface facing the battery cell is arranged at the joint of the first sub-hole and the second sub-hole; the first sub-portion is embedded in the first sub-hole, the second sub-portion is embedded in the second sub-hole, and the first connecting surface is connected with the second connecting surface.

In an embodiment of the utility model, one of the first top cover and the second top cover is provided with a limiting block, the other one is provided with a limiting hole, and the limiting block is embedded in the limiting hole so as to limit the relative rotation between the first top cover and the second top cover.

In an embodiment of the utility model, the battery further comprises: the first insulating piece is positioned on one side of the first top cover facing the battery core, and the first insulating piece is clamped between the pole and the first top cover; the second insulating piece is clamped between the pole and the first top cover; the third insulating piece is positioned at one side of the first top cover, which is away from the battery cell; and the riveting piece is positioned on one side of the first top cover, which is away from the battery cell, the first top cover is clamped by the riveting piece and the pole in a matched manner, and the third insulating piece is clamped between the riveting piece and the first top cover.

Correspondingly, the utility model also provides a top cover assembly of the battery, which comprises: a first top cover; the second top cover is fixedly connected with the first top cover, at least one of the second top cover and the first top cover is fixedly connected with the shell of the battery, and the second top cover, the first top cover and the shell are jointly enclosed to form a containing cavity; and the pole is penetrated through the first top cover.

The beneficial effects of the utility model are as follows: the present utility model provides a battery and a top cap assembly thereof, unlike the prior art. The top cover of the battery comprises a first top cover and a second top cover, and the pole is arranged on the first top cover in a penetrating mode. In the process of assembling the battery cell, before the first top cover and the second top cover are fixedly connected, the first top cover and the second top cover are of a split structure. For batteries with positive and negative poles on different sides, the assembly operation of the top cover where one pole is located is finished before the battery core is installed in the shell, and the assembly operation of the top cover where the other pole is located is carried out after the battery core is installed in the shell, or for some other batteries needing the battery core first-in shell, after the battery core is installed in the shell, the utility model allows the pole to be electrically connected with the connecting sheet of the battery, then the connecting sheet is electrically connected with the pole lug of the battery core, and then the two split type top covers are fixedly connected together. Moreover, the first top cover and the second top cover are of split structures, so that the first top cover can be prevented from shielding the connection position of the connecting sheet and the lug as far as possible, and the connecting sheet can be conveniently and electrically connected with the lug after the pole is electrically connected with the connecting sheet, so that convenience in assembling the top cover can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an exploded view of one embodiment of a battery of the present utility model;

FIG. 2 is a schematic diagram of an embodiment of the battery cell and the connecting piece of the battery of the present utility model;

FIG. 3 is a schematic top view of the battery of FIG. 1 with a second top cover omitted;

fig. 4 is an exploded view of an embodiment of a cap assembly of a battery according to the present utility model;

fig. 5 is a schematic view of the structure of another embodiment of the cap assembly of the battery of the present utility model;

FIG. 6 is a schematic view showing a sectional structure of the head assembly A-A shown in FIG. 5;

fig. 7 is a schematic view of the structure of the region B of the cap assembly shown in fig. 6.

Reference numerals illustrate:

10 batteries; 11 a housing; a 111 accommodating chamber; 12 top cover; 121 a first top cap; 1211 a first sub-section; 1212 a second sub-section; 1213 a first connection surface; a 1214 stopper; 122 a second top cap; 1221 mounting holes; 1222 a first sub-aperture; 1223 a second sub-aperture; 1224 a second connection surface; 1225 spacing holes; 13, an electric core; 131 pole lugs; 14 pole; 15 connecting sheets; 151 first connection portions; 152 a second connection; 153 protective sheet; 16 a first insulating member; 161 a first side; 162 second side; 163 a first insulating portion; 164 a second insulating portion; 17 a second insulator; a third insulator 18; 19 rivet.

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", "lower", "left" and "right" are generally used to refer to the directions of the upper, lower, left and right sides of the device in actual use or operation, and are specifically shown in the drawings.

In the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "stacked," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model provides a battery and a top cover assembly thereof, which are respectively described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In order to solve the technical problem of poor convenience in assembling an integrated top cover in the prior art, an embodiment of the utility model provides a battery. The battery includes a housing. The battery also comprises a first top cover and a second top cover, wherein the first top cover is fixedly connected with the second top cover, at least one of the second top cover and the first top cover is fixedly connected with the shell, the second top cover, the first top cover and the shell enclose a containing cavity together, and the battery also comprises a battery cell which is contained in the containing cavity. The battery also comprises a pole, the pole penetrates through the first top cover, and the pole is electrically connected with the battery core. As will be described in detail below.

Referring to fig. 1 to 4, fig. 1 is an exploded view of an embodiment of a battery according to the present utility model, fig. 2 is a schematic view of an embodiment of an electrical connection between a battery cell and a connecting piece of the battery according to the present utility model, fig. 3 is a schematic view of a top view of the battery according to fig. 1, with a second top cover omitted, and fig. 4 is a schematic view of an exploded view of an embodiment of a top cover assembly of the battery according to the present utility model.

In one embodiment, battery 10 includes, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, as embodiments of the present disclosure are not limited thereto. The battery 10 is used to provide electrical energy to an electrical device. The electric device can be a mobile phone, portable equipment, a notebook computer, a battery car, an electric automobile, a ship, a spacecraft, an electric toy, an electric tool and the like. For example, spacecraft include airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, electric planers, and the like.

Specifically, the battery 10 includes a case 11 and a top cover 12. The top cover 12 is abutted with the housing 11 to form a housing chamber 111. The battery 10 further includes a battery cell 13, and the battery cell 13 is accommodated in the accommodating cavity 111. The top cover 12 is provided with a pole 14 in a penetrating way, and the pole 14 is electrically connected with the battery core 13. Referring to fig. 2, the battery cell 13 includes a battery cell 13 main body and a tab 131, wherein the battery cell 13 main body is formed by stacking or winding a pole piece and a diaphragm, and the tab 131 is electrically connected with the pole piece. The battery 10 further includes a connecting piece 15, and the pole 14 is electrically connected to the tab 131 through the connecting piece 15.

In one embodiment, the top cover 12 has a first direction (as indicated by arrow X in FIG. 1, the same applies hereinafter) and a second direction (including the directions indicated by arrows Y1 and Y2 in FIG. 3, the same applies hereinafter) that intersect. Preferably, the first direction and the second direction are perpendicular to each other. The top cover 12 is abutted with the housing 11 along the first direction to form a receiving chamber 111. The top cover 12 includes a first top cover 121 and a second top cover 122 which are separated from each other, the first top cover 121 and the second top cover 122 are arranged along the second direction, the first top cover 121 is fixedly connected with the second top cover 122, at least one of the second top cover 122 and the first top cover 121 is fixedly connected with the shell 11, the second top cover 122, the first top cover 121 and the shell 11 enclose a containing cavity 111 together, and the pole 14 penetrates through the first top cover 121.

Optionally, the top cover and the shell are fixed by welding, bonding, and the like.

In this way, the present embodiment allows the pole 14 to be electrically connected with the connecting piece 15 of the battery 10, and then the connecting piece 15 is electrically connected with the tab 131 of the battery cell 13. Moreover, since the first top cover 121 and the second top cover 122 are of separate structures, the first top cover 121 can avoid the connection position between the connecting piece 15 and the tab 131 as much as possible, so that the connecting piece 15 can be electrically connected with the tab 131 conveniently after the pole 14 is electrically connected with the connecting piece 15, and the convenience of assembling the top cover 12 can be improved.

In the prior art, for the batteries with the positive and negative poles located at different sides, the assembly operation of the top cover where one pole is located is completed before the battery cell is mounted in the housing, and the assembly operation of the top cover where the other pole is located is performed after the battery cell is mounted in the housing. After the battery cell is assembled into the housing, the connecting piece of the battery is usually welded with the tab, and then the connecting piece is welded with the post. Because the top cover in the prior art generally adopts an integrated design, after the connecting sheet is welded with the lug, the connecting sheet is fixed, so that the integrated top cover is inconvenient for welding the pole on the integrated top cover and the connecting sheet in the shell.

In contrast, in the present embodiment, the pole 14 on the first top cover 121 is electrically connected with the connecting piece 15, then the connecting piece 15 is electrically connected with the tab 131, and finally the first top cover 121 is connected with the second top cover 122 to form the complete top cover 12. Because the first top cover 121 and the second top cover 122 are of separate structures, the first top cover 121 can avoid the connection position between the connecting piece 15 and the tab 131 as much as possible, so that the connecting piece 15 can be electrically connected with the tab 131 conveniently after the pole 14 is electrically connected with the connecting piece 15, thereby improving the convenience of assembling the top cover 12.

The top cover 12 of the present embodiment is not limited to this, and may be applied to a battery 10 having positive and negative electrode posts on different sides, or to a battery 10 having positive and negative electrode posts on the same side. The electrode post 14 of the present embodiment may be a positive electrode post or a negative electrode post, and is not limited thereto.

In one embodiment, the top cover 12 also has a reference plane perpendicular to the first direction (as shown by plane α in fig. 3, the same applies below), as shown in fig. 3. The battery 10 further comprises a connecting tab 15. The connecting piece 15 includes a first connecting portion 151 and a second connecting portion 152 connected to each other, that is, the first connecting portion 151 and the second connecting portion 152 are electrically connected. The first connection portion 151 is electrically connected to the battery core 13, specifically, the first connection portion 151 is electrically connected to the tab 131. The second connection portion 152 is electrically connected to the pole 14, and the pole 14 is electrically connected to the electrical core 13 through the connection piece 15.

The first top cover 121 has a first front projection on the reference plane, and the first connection portion 151 has a second front projection on the reference plane, at least a portion of which is located outside the first front projection. In other words, the first top cover 121 of the present embodiment does not completely cover the first connection portion 151 of the connecting piece 15, so that the first connection portion 151 is in an exposed state after the pole 14 is electrically connected with the second connection portion 152, and the first connection portion 151 can be electrically connected with the tab 131 conveniently.

In one embodiment, the second direction includes a longitudinal direction (as indicated by an arrow Y1 in fig. 3, the same applies hereinafter) and a thickness direction (as indicated by an arrow Y2 in fig. 3, the same applies hereinafter) perpendicular to each other. The battery 10 as a whole may exhibit a rectangular parallelepiped-like configuration, with the length of the top cover 12 in the length direction being longer than that in the thickness direction. Of course, in other embodiments of the present utility model, the battery 10 as a whole may also exhibit a cube, cylinder, etc. like configuration, without limitation.

The battery 10 also includes a first insulator 16. Opposite sides of the first insulating member 16 in the first direction are a first side 161 and a second side 162, respectively, the first side 161 faces the first top cover 121 and the second top cover 122, and the cell 13 body of the cell 13 is located at the second side 162. The first insulating member 16 includes a first insulating portion 163 and a second insulating portion 164 provided in the longitudinal direction. The first insulating part 163 is interposed between the first top cap 121 and the pole 14 such that the first top cap 121 and the pole 14 are insulated from each other. At least part of the second insulating portion 164 has a gap G between the inner sidewall of the accommodation chamber 111 in the thickness direction.

The tab 131 and the first connection portion 151 extend from the gap G to the first side 161 for electrical connection, and the tab 131 and the first connection portion 151 are folded towards the second side 162. Specifically, after the electrode post 14 is electrically connected to the second connection portion 152 of the connecting piece 15, the electrode tab 131 and the first connection portion 151 extend from the gap G to the first side 161, so as to facilitate the electrical connection between the electrode tab 131 and the first connection portion 151; after the tab 131 is electrically connected with the first connection portion 151, the tab 131 and the first connection portion 151 are turned towards the second side 162, so that the space occupied by the tab 131 and the first connection portion 151 in the first direction can be reduced, which is beneficial to improving the space utilization rate and further improving the performance parameters of the battery 10, such as energy density. Further, after the tab 131 and the first connection portion 151 are turned towards the second side 162, the orthographic projection of the first connection portion 151 on the reference plane is at least partially located in the orthographic projection of the gap G on the reference plane.

Further, the length of the first insulating portion 163 is greater than the length of the above-described at least part of the second insulating portion 164 in the thickness direction, so that the at least part of the second insulating portion 164 can form a gap G with the inner side wall of the accommodating chamber 111 in the thickness direction.

For example, in the thickness direction, both outer edges of the second insulating portion 164 are recessed inward such that gaps G are formed on both sides of the second insulating portion 164. The number of the first connection portions 151 is two, and the two first connection portions 151 are disposed at intervals from each other in the thickness direction and both are connected to the second connection portion 152. The tab 131 of the battery core 13 is divided into two parts, wherein one part of the tab 131 and one first connecting part 151 extend from one gap G to the first side 161 for electric connection and turnover, and the other part of the tab 131 and the other first connecting part 151 extend from the other gap G to the first side 161 for electric connection and turnover.

Alternatively, the difference between the length of the first insulating portion 163 and the length of the at least part of the second insulating portion 164 may be greater than 0mm and less than or equal to 20mm, such as 1mm, 5mm, 10mm, 15mm, 20mm, etc., in the thickness direction. In this way, by reasonably setting the length of the gap G in the thickness direction, the present embodiment not only can facilitate the tab 131 and the first connection portion 151 to extend from the gap G for electrical connection and fold, but also can avoid the second insulation portion 164 from being unable to reliably realize the insulation function due to too small length of the second insulation portion 164 in the thickness direction.

Optionally, the battery 10 further includes a protective sheet 153, as shown in fig. 2. The tab 131 is sandwiched between the first connection portion 151 and the protection sheet 153. The protection sheet 153 can play a protection role in the welding process of the tab 131 and the first connection part 151.

Referring to fig. 5 to 7 together, fig. 5 is a schematic structural view of another embodiment of a top cap assembly of a battery according to the present utility model, fig. 6 is a schematic structural view of a cross-section of the top cap assembly A-A shown in fig. 5, and fig. 7 is a schematic structural view of a region B of the top cap assembly of fig. 6.

In an embodiment, the second top cover 122 is provided with a mounting hole 1221, and the first top cover 121 is embedded in the mounting hole 1221, so that the first top cover 121 and the second top cover 122 are connected to form a complete top cover 12. In other words, the first top cover 121 and the second top cover 122 of the present embodiment are disposed along the length direction and the thickness direction. Of course, in other embodiments of the present utility model, the first top cover 121 and the second top cover 122 may be disposed only along the length direction or only along the thickness direction, which is not limited herein.

Specifically, the first top cover 121 includes a first sub-portion 1211 and a second sub-portion 1212. The first sub-portion 1211 is located at a side of the second sub-portion 1212 facing away from the battery cell 13, the second sub-portion 1212 has a first connection surface 1213 facing away from the battery cell 13, and the first connection surface 1213 is annularly disposed on the outer periphery of the first sub-portion 1211. The mounting hole 1221 includes a first sub-hole 1222 and a second sub-hole 1223 that are in communication with each other, the first sub-hole 1222 is far from the battery cell 13 relative to the second sub-hole 1223, and a connection portion between the first sub-hole 1222 and the second sub-hole 1223 has a second connection surface 1224 facing the battery cell 13. When the first top cover 121 is embedded in the mounting hole 1221, the first sub-portion 1211 is embedded in the first sub-hole 1222, the second sub-portion 1212 is embedded in the second sub-hole 1223, and the first connecting surface 1213 is connected to the second connecting surface 1224.

Alternatively, the length of the first sub-portion 1211 in the first direction may be 0.1mm to 1mm, for example 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or the like. In this way, by reasonably setting the length of the first sub-portion 1211 in the first direction, the present embodiment not only can facilitate the positioning of the first top cover 121 and the second top cover 122 in the process of connecting the first top cover 121 and the second top cover 122, but also can avoid that the length of the first sub-portion 1211 in the first direction is too large, which results in that the whole battery 10 occupies too much space in the first direction.

In one embodiment, one of the first top cover 121 and the second top cover 122 is provided with a limiting block 1214, the other is provided with a limiting hole 1225, and the limiting block 1214 is embedded in the limiting hole 1225 to limit the relative rotation between the first top cover 121 and the second top cover 122.

For example, the outer side wall of the first top cover 121 is provided with a limiting block 1214. Specifically, the limiting block 1214 is protruding from the outer side wall surface of the first sub portion 1211, and the limiting block 1214 is located on the side of the second sub portion 1212 facing away from the battery cell 13. The second top cover 122 is provided with a limiting hole 1225, and the limiting hole 1225 is communicated with the mounting hole 1221. Specifically, the limiting hole 1225 communicates with the first sub-hole 1222, and the limiting hole 1225 is far from the cell 13 relative to the second sub-hole 1223. When the first top cover 121 is embedded in the mounting hole 1221, the limiting block 1214 is embedded in the limiting hole 1225. The number of the limiting blocks 1214 and the limiting holes 1225 may be one or two or more. When the number of the sets of the limiting blocks 1214 and the limiting holes 1225 is two or more, the sets of the limiting blocks 1214 and the limiting holes 1225 are spaced apart from each other along the circumferential direction of the first top cover 121. Fig. 5 illustrates an exemplary case where the number of the limiting blocks 1214 and the limiting holes 1225 is two, which is not limited herein.

In one embodiment, the first insulating member 16 is located on the side of the first top cover 121 facing the battery cell 13, and the first insulating member 16 is sandwiched between the pole 14 and the first top cover 121. The battery 10 further includes a second insulating member 17, and the second insulating member 17 is sandwiched between the pole 14 and the first top cover 121. A part of the second insulating member 17 is sandwiched between the pole 14 and the first top cover 121 in the first direction, and another part is sandwiched between the pole 14 and the first top cover 121 in the second direction. The battery 10 further includes a third insulating member 18, the third insulating member 18 being located on a side of the first top cover 121 facing away from the battery cells 13. The battery 10 further includes a rivet 19, the rivet 19 is located on a side of the first top cover 121 facing away from the battery cell 13, the rivet 19 cooperates with the terminal 14 to clamp the first top cover 121, and the third insulating member 18 is clamped between the rivet 19 and the first top cover 121.

In an embodiment, the top cover 12 assembly of the battery 10 includes a top cover 12, the top cover 12 has a first direction and a second direction perpendicular to each other, and the top cover 12 can be abutted with the housing 11 of the battery 10 along the first direction to form a cavity for accommodating the battery cell 13. The top cover 12 includes a first top cover 121 and a second top cover 122 that are separated from each other, and the first top cover 121 and the second top cover 122 are disposed along a second direction. The top cap 12 assembly further includes a pole 14, and the pole 14 is disposed through the first top cap 121.

It should be noted that the top cover 12 and the pole 14 of the present embodiment are described in detail in the above embodiments, and will not be described herein again.

The assembly process of the battery 10 according to the embodiment of the present utility model will be explained below.

Welding the pole 14 on the first top cover 121 and the second connecting part 152 of the connecting sheet 15; after the battery cell 13 is installed in the shell 11, the tab 131 and the first connection part 151 of the connecting sheet 15 extend out of the gap G and are welded, and then the tab 131 and the first connection part 151 are folded towards the second side 162 of the first insulating member 16; the first top cap 121 is then docked with the second top cap 122 such that the first top cap 121 is inserted into the mounting hole 1221, and the first top cap 121 is then welded to the second top cap 122 such that the first top cap 121 is connected to the second top cap 122 to form the completed top cap 12. The assembly operation of the top cover 12 of the battery 10 is completed.

The battery and the top cover assembly thereof provided by the utility model are described in detail, and specific examples are applied to illustrate the principles and the implementation modes of the utility model, and the description of the examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. A battery, comprising:

a housing;

a first top cover;

the second top cover is fixedly connected with the first top cover, at least one of the second top cover and the first top cover is fixedly connected with the shell, and the second top cover, the first top cover and the shell jointly enclose a containing cavity;

the battery cell is accommodated in the accommodating cavity; and

the pole penetrates through the first top cover, and the pole is electrically connected with the battery cell.

2. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the first top cover and the second top cover have a first direction and a second direction which are intersected, and also have a reference plane perpendicular to the first direction;

the battery further includes:

the connecting piece comprises a first connecting part and a second connecting part which are connected with each other, the first connecting part is electrically connected with the battery cell, and the second connecting part is electrically connected with the pole;

the first top cover is provided with a first orthographic projection on the reference plane, the first connecting part is provided with a second orthographic projection on the reference plane, and at least part of the second orthographic projection is located outside the first orthographic projection.

3. The battery of claim 2, wherein the battery is configured to provide the battery with a plurality of cells,

the second direction comprises a length direction and a thickness direction which are mutually perpendicular;

the battery further comprises a first insulating piece, wherein two opposite sides of the first insulating piece in the first direction are a first side and a second side respectively, and the first side faces the first top cover and the second top cover;

the first insulating piece comprises a first insulating part and a second insulating part, wherein the first insulating part and the second insulating part are arranged along the length direction, the first insulating part is clamped between the first top cover and the pole, and at least part of the second insulating part is provided with a gap between the thickness direction and the inner side wall of the accommodating cavity.

4. The battery of claim 3, wherein the battery is provided with a battery cell,

the battery cell comprises a battery cell main body and a tab, wherein the battery cell main body is connected with the tab, and the battery cell main body is positioned at the second side; the tab and the first connection portion extend from the gap to the first side for electrical connection, and the tab and the first connection portion are folded towards the second side.

5. The battery of claim 3, wherein the battery is provided with a battery cell,

the orthographic projection of the first connection on the reference plane is at least partially located in the orthographic projection of the gap on the reference plane.

6. The battery according to any one of claim 1 to 5, wherein,

the second top cover is provided with a mounting hole, and the first top cover is embedded in the mounting hole.

7. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

the first top cover comprises a first sub-part and a second sub-part, the first sub-part is positioned at one side of the second sub-part, which is away from the battery cell, the second sub-part is provided with a first connecting surface, which is away from the battery cell, and the first connecting surface is annularly arranged at the periphery of the first sub-part;

the mounting hole comprises a first sub-hole and a second sub-hole which are communicated with each other, the first sub-hole is far away from the battery cell relative to the second sub-hole, and a second connecting surface facing the battery cell is arranged at the joint of the first sub-hole and the second sub-hole;

the first sub-portion is embedded in the first sub-hole, the second sub-portion is embedded in the second sub-hole, and the first connecting surface is connected with the second connecting surface.

8. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

one of the first top cover and the second top cover is provided with a limiting block, the other one of the first top cover and the second top cover is provided with a limiting hole, and the limiting block is embedded in the limiting hole so as to limit relative rotation between the first top cover and the second top cover.

9. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the battery further includes:

the first insulating piece is positioned on one side of the first top cover facing the battery cell, and is clamped between the pole and the first top cover;

the second insulating piece is clamped between the pole and the first top cover;

the third insulating piece is positioned at one side of the first top cover, which is away from the battery cell; and

the riveting piece is located one side of the first top cover, which is away from the battery cell, the riveting piece is matched with the pole to clamp the first top cover, and the third insulating piece is clamped between the riveting piece and the first top cover.

10. A top cap assembly of a battery, the top cap assembly comprising:

a first top cover;

the second top cover is fixedly connected with the first top cover, at least one of the second top cover and the first top cover is fixedly connected with the shell of the battery, and the second top cover, the first top cover and the shell are jointly enclosed to form a containing cavity; and

and the pole is penetrated through the first top cover.