CN220544183U - Battery cell - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery, which comprises: the battery cell comprises a battery cell main body and a first tab, wherein the battery cell main body comprises a first pole piece, the first tab extends out from the first pole piece, the first pole piece comprises a plurality of first single-piece pole piece layers which are arranged in a laminated manner, and the first tab comprises a plurality of first single-piece tab layers which are arranged in a laminated manner; the battery cell is arranged in the shell, the shell comprises a cover plate and a shell piece, the shell piece comprises a side wall section and a bottom wall section, and the side wall section and the bottom wall section are of an integrated structure; the pole column structure is arranged on the bottom wall section and is electrically connected with the battery cell. Through making the total number of first monolithic tab layer and the ratio of total number of first monolithic pole piece layer be 0.31-0.92, not only can reduce the risk of dislocation layer behind the first monolithic tab layer beam harvest, and on the basis of guaranteeing first tab overflow ability, first tab overall thickness can not be too big, and then improves battery inner space utilization.

Description

Battery cell

Technical Field

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

Background

In the related art, the battery core can be led out by adopting the full tab, the situation that the split layer is serious possibly occurs after the tab is folded, and the overall thickness is increased after the tab is folded, so that the utilization rate of the internal space of the battery is lower, and the service performance of the battery is affected.

Disclosure of Invention

The utility model provides a battery, which is used for improving the service performance of the battery.

The present utility model provides a battery comprising:

the battery cell comprises a battery cell main body and a first tab, wherein the battery cell main body comprises a first pole piece, the first tab extends out from the first pole piece, the first pole piece comprises a plurality of first single-piece pole piece layers which are arranged in a laminated mode, the first tab comprises a plurality of first single-piece pole piece layers which are arranged in a laminated mode, the first single-piece pole piece layers extend out from the first single-piece pole piece layers, and the ratio of the total number of the first single-piece pole piece layers to the total number of the first single-piece pole piece layers is 0.31-0.92;

the battery cell is arranged in the shell, the shell comprises a cover plate and a shell piece, the shell piece comprises a side wall section and a bottom wall section, the side wall section and the bottom wall section are of an integrated structure, the cover plate is connected with the side wall section, and the cover plate is arranged opposite to the bottom wall section;

the pole column structure is arranged on the bottom wall section and is electrically connected with the battery cell.

The battery provided by the embodiment of the utility model comprises a battery core, a shell and a pole structure, wherein the pole structure is electrically connected with the battery core, the shell comprises a cover plate and a shell piece, a side wall section and a bottom wall section of the shell piece are of an integrated structure, and the pole structure is arranged on the bottom wall section, so that the space of the shell piece is reasonably utilized, and the structural stability of the shell is improved. The battery cell comprises a battery cell main body and a first tab, wherein the first pole piece of the battery cell main body is formed by a plurality of first single-piece pole piece layers which are stacked, the first tab is formed by the plurality of first single-piece pole piece layers which are stacked, the first single-piece pole piece layers extend out of the first single-piece pole piece layers, the ratio of the total number of the first single-piece pole piece layers to the total number of the first single-piece pole piece layers is 0.31-0.92, namely the total number of the first single-piece pole piece layers is smaller than the total number of the first single-piece pole piece layers, the risk of staggered layers after the first single-piece pole piece layers are converged can be reduced, and the whole thickness of the first tab is not too large on the basis of guaranteeing the overcurrent capacity of the first tab, so that the internal space utilization rate of the battery is improved, and the service performance of the battery is reliably improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic view showing a structure of a battery according to an exemplary embodiment;

fig. 2 is a schematic view showing a partial sectional structure of a battery according to an exemplary embodiment;

fig. 3 is a schematic view showing a partial sectional structure of a battery according to another exemplary embodiment;

fig. 4 is a schematic structural view of a battery cell of a battery according to an exemplary embodiment;

fig. 5 is a partial structural schematic diagram of a battery cell of a battery according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a battery cell; 11. a cell body; 111. a first pole piece; 1111. a first monolithic pole piece layer; 112. a second pole piece; 113. a diaphragm; 114. an end face; 12. a first tab; 121. a first monolithic tab layer; 13. a second lug; 20. a housing; 21. a cover plate; 22. a housing member; 221. a sidewall section; 222. a bottom wall section; 30. a pole structure; 31. a through hole; 40. an adapter.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

An embodiment of the present utility model provides a battery, referring to fig. 1 to 5, the battery includes: the battery cell 10, the battery cell 10 comprises a battery cell main body 11 and a first tab 12, the battery cell main body 11 comprises a first pole piece 111, the first tab 12 extends out from the first pole piece 111, the first pole piece 111 comprises a plurality of first single-sheet pole piece layers 1111 which are arranged in a stacked manner, the first tab 12 comprises a plurality of first single-sheet tab layers 121 which are arranged in a stacked manner, the first single-sheet tab layers 121 extend out from the first single-sheet pole piece layers 1111, and the ratio of the total number of the first single-sheet tab layers 121 to the total number of the first single-sheet pole piece layers 1111 is 0.31-0.92; the battery cell 10 is arranged in the shell 20, the shell 20 comprises a cover plate 21 and a shell piece 22, the shell piece 22 comprises a side wall section 221 and a bottom wall section 222, the side wall section 221 and the bottom wall section 222 are of an integrated structure, the cover plate 21 is connected with the side wall section 221, and the cover plate 21 is arranged opposite to the bottom wall section 222; the pole structure 30, the pole structure 30 is disposed on the bottom wall segment 222 and electrically connected to the battery cell 10.

The battery according to one embodiment of the utility model comprises a battery core 10, a housing 20 and a post structure 30, wherein the post structure 30 is electrically connected with the battery core 10, the housing 20 comprises a cover plate 21 and a housing member 22, a side wall section 221 and a bottom wall section 222 of the housing member 22 are integrally formed, and the post structure 30 is arranged on the bottom wall section 222, so that the space of the housing member 22 is reasonably utilized, and the structural stability of the housing 20 is improved. The battery core 10 includes a battery core main body 11 and a first tab 12, the first pole piece 111 of the battery core main body 11 is formed by a plurality of first single-chip pole piece layers 1111 which are stacked, the first tab 12 is formed by a plurality of first single-chip pole piece layers 121 which are stacked, the first single-chip pole piece layers 121 extend from the first single-chip pole piece layers 1111, and the ratio of the total number of the first single-chip pole piece layers 121 to the total number of the first single-chip pole piece layers 1111 is 0.31-0.92, i.e. the total number of the first single-chip pole piece layers 121 is smaller than the total number of the first single-chip pole piece layers 1111, the risk of staggered layers after the first single-chip pole piece layers 121 are bundled is reduced, and the overall thickness of the first tab 12 is not too large on the basis of guaranteeing the overcurrent capacity of the first tab 12, so that the utilization rate of the internal space of the battery is improved, and the service performance of the battery is reliably improved.

It should be noted that, as shown in fig. 1 to 4, the battery cell 10 includes a battery cell main body 11 and a first tab 12 extending from the battery cell main body 11, and the first tab 12 may be electrically connected to the pole structure 30.

The battery includes an electric core and an electrolyte, and is capable of performing a minimum unit of electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacked part, wherein the stacked part comprises a first pole piece, a diaphragm and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.

As shown in connection with fig. 5, a separator 113 may be disposed between the first and second electrode sheets 111 and 112, the first electrode sheet 111 shown in fig. 5 is formed of a plurality of first single-sheet electrode layers 1111, and structural division is not made for the second electrode sheet 112 and the separator 113, but only the positional relationship with the first single-sheet electrode layers 1111 is illustrated.

The battery cell 10 may be a winding type battery cell, where a plurality of first monolithic pole piece layers 1111 of the first monolithic pole piece layer 1111 are connected to form an integral first monolithic pole piece layer 1111; alternatively, the battery cell 10 may be a laminated battery cell, where the plurality of first monolithic pole piece layers 1111 of the first monolithic pole piece layer 1111 are all independently disposed.

The first pole piece 111 includes a plurality of first monolithic pole piece layers 1111 arranged in a stacked manner, and the first tab 12 includes a plurality of first monolithic tab layers 121 arranged in a stacked manner. As shown in fig. 5, the first monolithic tab layer 121 extends from the first monolithic tab layer 1111, and the total number of the first monolithic tab layers 121 may be smaller than the total number of the first monolithic tab layers 1111, that is, the first monolithic tab layer 121 may not be led out from at least one of the first monolithic tab layers 1111, and compared with a full tab structure, the thickness of the first tab 12 formed by the plurality of first monolithic tab layers 121 may be reduced, and the probability of occurrence of dislocation between the first monolithic tab layers 1111 may be reduced.

By making the ratio of the total number of the first monolithic tab layers 121 to the total number of the first monolithic pole piece layers 1111 be 0.31-0.92, the probability of occurrence of dislocation between the first monolithic pole piece layers 1111 can be reduced, and the overall thickness of the first tab 12 bent is reduced, so that the utilization rate of the internal space of the battery is higher.

The ratio of the total number of first monolithic tab layers 121 to the total number of first monolithic pole piece layers 1111 may be 0.31, 0.32, 0.35, 0.38, 0.4, 0.41, 0.42, 0.45, 0.48, 0.5, 0.51, 0.52, 0.55, 0.58, 0.6, 0.61, 0.62, 0.65, 0.68, 0.7, 0.71, 0.72, 0.75, 0.78, 0.8, 0.81, 0.82, 0.85, 0.88, 0.9, 0.91, or 0.92, etc.

As shown in fig. 1, the case 20 includes a cover 21 and a case member 22, and the cover 21 and the case member 22 are connected to each other, thereby accommodating the battery cell 10.

The case member 22 includes a side wall section 221 and a bottom wall section 222, and the side wall section 221 and the bottom wall section 222 are integrally formed, so that not only structural strength of the side wall section 221 and the bottom wall section 222 can be ensured, but also forming efficiency of the side wall section 221 and the bottom wall section 222 can be ensured, and further manufacturing efficiency of the battery can be controlled.

The cover plate 21 is connected to the sidewall segment 221, for example, the cover plate 21 and the sidewall segment 221 may be welded by laser, resistance welding, ultrasonic welding, or the like.

Referring to fig. 1, the pole structure 30 is disposed on the bottom wall segment 222, and the bottom wall segment 222 may be disposed opposite to the cover plate 21, so that the pole structure 30 faces the top end of the battery case when the batteries are assembled, and the cover plate 21 may form a support for the battery core 10 at this time, which does not exclude that the pole structure 30 may face the bottom end of the battery case.

In one embodiment, the battery cell 10 is a winding type battery cell, so that not only can the molding efficiency of the battery cell 10 be effectively controlled and the battery manufacturing efficiency be improved, but also the battery cell 10 can fully exert the electrical performance when the total number of the first single tab layers 121 can be smaller than the total number of the first single pole piece layers 1111.

The battery cell 10 may be a square battery cell, after the battery cell 10 is wound and formed, the battery cell 10 may be flattened, thereby forming a square battery cell, at this time, the first pole piece 111 includes a plurality of first monolithic pole piece layers 1111 stacked and arranged, adjacent first monolithic pole piece layers 1111 are connected, and the first tab 12 includes a plurality of first monolithic tab layers 121 stacked and arranged, and adjacent first monolithic tab layers 121 may be connected, or adjacent first monolithic tab layers 121 may not be connected.

In one embodiment, the end surface 114 of the first tab 12 extending from the battery core main body 11 has a central line extending along a first direction, the first tab 12 is asymmetrically disposed about the central line, and the first direction is parallel to the first monolithic tab layer 121 after being straightened, that is, the first tab 12 may be disposed in an offset manner, so that the beam-shrinking of the first tab 12 may be conveniently achieved, and the probability of occurrence of a staggered layer in the first monolithic tab layer 121 of the first tab 12 is reduced.

Referring to fig. 4, the first direction may be denoted as a, and the end surface 114 of the cell body 11 may have a center line parallel to the first direction, and in this case, the first tab 12 is asymmetrically disposed about the center line, that is, the first tab 12 may be disposed to be offset to one side of the center line, as shown in fig. 4, and the first tab 12 is integrally offset.

The first tab 12 is formed of a plurality of first single tab layers 121, and after the first single tab layers 121 are straightened, the first single tab layers 121 can be considered to have a flat large surface, and at this time, the first direction is parallel to the first single tab layers 121. The first direction may also be considered as the length direction of the end face 114.

In one embodiment, the through hole 31 is disposed on the pole post structure 30, and at least part of the connection area between the first pole tab 12 and the end face 114 is disposed opposite to the through hole 31, so that the positioning of the first pole tab 12 can be formed by the through hole 31 of the pole post structure 30, thereby improving the connection accuracy of the first pole tab 12, and further improving the manufacturing efficiency of the battery.

The region where the first tab 12 is connected to the end surface 114 may be regarded as a region formed by the root portion where each of the first monolithic tab layers 121 is connected to the corresponding first monolithic pole piece layer 1111, by arranging at least part of the region where the first tab 12 is connected to the end surface 114 directly opposite to the through hole 31, positioning of the first tab 12 may be formed by the through hole 31, for example, it is convenient to realize that the first tab 12 is inserted into the through hole 31, or an electrical connection between the first tab 12 and the pole structure 30 is formed by the through hole 31, or the like.

In one embodiment, the first monolithic tab layer 121 of the plurality of first monolithic tab layers 121 that is farthest from the center line extending along the first direction from the end surface 114 is aligned with the through hole 31 after being straightened, so that the first monolithic tab layer 121 located at the end portion can be aligned with the through hole 31, which not only improves the positioning capability of the first tab 12, but also can conveniently realize connection of the first tab 12.

The area where the first tab 12 is connected to the end face 114 may be regarded as a rectangular face, and the end face 114 has a center line extending in the first direction a, and at this time, the rectangular face may be regarded as being formed by a first one of the plurality of first one-piece tab layers 121 which is farthest from the center line extending in the first direction from the end face 114 along the second direction perpendicular to the first direction a, and the first one-piece tab layer 121 is disposed directly opposite the through hole 31 after being straightened, that is, the side farthest from the center line is disposed directly opposite the through hole 31.

In one embodiment, as shown in fig. 1, after the plurality of first single tab layers are folded, a first tab 12 is formed, and the first tab 12 is disposed in the through hole 31 in a penetrating manner, so that the through hole 31 forms a limit on the first tab 12, and the electrode post structure 30 is electrically connected with the first tab 12 conveniently.

In one embodiment, as shown in fig. 1 and fig. 2, the through hole 31 is disposed on the pole structure 30, and the first tab 12 is disposed in the through hole 31 in a penetrating manner, so that not only can the electrical connection between the pole structure 30 and the first tab 12 be conveniently realized, but also the installation efficiency of the battery cell 10 can be improved, and the first tab 12 forms the installation location of the battery cell 10.

The first tab 12 may be directly connected to the post structure 30 as shown in fig. 2.

The first tab 12 is disposed in the through hole 31, and the first tab 12 may be welded to the post structure 30,

in one embodiment, as shown in fig. 3, the post structure 30 is provided with a through hole 31, the battery further includes an adaptor 40, the adaptor 40 is connected to one side of the first tab 12 far away from the battery core main body 11, the adaptor 40 is disposed in the through hole 31 in a penetrating manner and is electrically connected with the post structure 30, the size of the first tab 12 can be properly reduced by the arrangement of the adaptor 40, the connection between the battery core 10 and the post structure 30 is facilitated, and the adaptor 40 can be conveniently controlled to be disposed in the through hole 31 in a penetrating manner.

The first tab 12 and the adaptor 40 may be welded, or the first tab 12 and the adaptor 40 may be connected by conductive adhesive, which is not limited herein.

The adapter 40 and the pole structure 30 may be welded together.

In one embodiment, the through hole 31 is disposed in the middle of the pole structure 30, so that the pole structure 30 can form an effective limit for the first tab 12, and the first tab 12 is prevented from being separated from the pole structure 30.

In one embodiment, the through hole 31 is disposed in the central area of the pole structure 30, so that not only can the connection stability between the pole structure 30 and the first tab 12 be ensured, but also the structural strength of the pole structure 30 can be effectively controlled, and the problem of local fusing caused by no overcurrent capability of the pole structure 30 is avoided.

It should be noted that, if the first tab 12 is inserted into the through hole 31, the thickness of the first tab 12 is too large, the difficulty of inserting the first tab 12 into the through hole 31 is relatively large, which is not beneficial to improving the installation efficiency, and when the thickness of the first tab 12 is too large, the width of the through hole 31 is relatively large, which affects the overcurrent capacity of the pole structure 30 to a certain extent, and the ratio of the total number of the first monolithic tab layers 121 to the total number of the first monolithic pole piece layers 1111 is 0.31-0.92, so that the thickness of the first tab 12 can be effectively controlled, and the manufacturing efficiency and the safety performance of the battery can be reliably improved.

In one embodiment, as shown in fig. 4, the battery cell 10 further includes a second tab 13, where the first tab 12 and the second tab 13 extend from the same end of the battery cell main body 11, so that the overall height of the battery cell 10 can be reduced, which is beneficial to improving the space utilization of the battery, so as to control the energy density of the battery.

It should be noted that, in some embodiments, it is not excluded that the first tab 12 and the second tab 13 may extend from opposite ends of the cell main body 11.

In one embodiment, the battery may be a quadrangular prism type battery, and the quadrangular prism type battery mainly refers to a prism shape, but whether each side of the prism is a straight line in a strict sense is not strictly limited, and corners between sides are not necessarily right angles, and may be arc transition.

The battery can be a laminated battery, so that the battery is not only convenient to group, but also long in length. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Alternatively, the battery may be a wound battery in which a first pole piece, a second pole piece opposite in electrical property to the first pole piece, and a separator sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

In one embodiment, the battery may be a cylindrical battery, or the battery may be a hexagonal-prism-type battery. The battery can be a winding type battery, namely, a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding type battery cell.

An embodiment of the present utility model also provides a battery pack including the above battery.

The battery of the battery pack according to an embodiment of the present utility model includes a battery cell 10, a housing 20, and a post structure 30, where the post structure 30 is electrically connected to the battery cell 10, the housing 20 includes a cover plate 21 and a housing member 22, and a sidewall section 221 and a bottom wall section 222 of the housing member 22 are integrally formed, and the post structure 30 is disposed on the bottom wall section 222, thereby reasonably utilizing the space of the housing member 22 and improving the structural stability of the housing 20. The battery cell 10 includes a battery cell main body 11 and a first tab 12, the first pole piece 111 of the battery cell main body 11 is formed by a plurality of first single-sheet pole piece layers 1111 which are stacked, the first tab 12 is formed by a plurality of first single-sheet pole piece layers 121 which are stacked, the first single-sheet pole piece layers 121 extend from the first single-sheet pole piece layers 1111, and the ratio of the total number of the first single-sheet pole piece layers 121 to the total number of the first single-sheet pole piece layers 1111 is 0.31-0.92, i.e. the total number of the first single-sheet pole piece layers 121 is smaller than the total number of the first single-sheet pole piece layers 1111, the risk of staggered layers after the first single-sheet pole piece layers 121 are bundled is reduced, and the overall thickness of the first tab 12 is not too large on the basis of guaranteeing the overcurrent capacity of the first tab 12, so that the utilization rate of the internal space of the battery is improved, and the service performance of the battery pack is reliably improved.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixed a plurality of batteries.

It should be noted that, a plurality of batteries may be disposed in the battery case after forming the battery module, and may be fixed by the end plate and the side plate. The plurality of cells may be disposed directly in the cell case, i.e., without grouping the plurality of cells, at which time the end plates and the side plates may be removed.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A battery, comprising:

the battery cell (10), the battery cell (10) comprises a battery cell main body (11) and a first tab (12), the battery cell main body (11) comprises a first pole piece (111), the first tab (12) extends out from the first pole piece (111), the first pole piece (111) comprises a plurality of first single-piece pole piece layers (1111) which are arranged in a stacked mode, the first tab (12) comprises a plurality of first single-piece pole piece layers (121) which are arranged in a stacked mode, the first single-piece pole piece layers (121) extend out from the first single-piece pole piece layers (1111), and the ratio of the total number of the first single-piece pole piece layers (121) to the total number of the first single-piece pole piece layers (1111) is 0.31-0.92;

the battery cell (10) is arranged in the shell (20), the shell (20) comprises a cover plate (21) and a shell piece (22), the shell piece (22) comprises a side wall section (221) and a bottom wall section (222), the side wall section (221) and the bottom wall section (222) are of an integrally formed structure, the cover plate (21) is connected with the side wall section (221), and the cover plate (21) is arranged opposite to the bottom wall section (222);

and the pole column structure (30) is arranged on the bottom wall section (222) and is electrically connected with the battery cell (10).

2. The battery according to claim 1, characterized in that the cell (10) is a wound cell.

3. The battery according to claim 1, characterized in that the end face (114) of the cell body (11) from which the first tab (12) extends has a center line extending in a first direction, the first tab (12) being asymmetrically arranged about the center line, the first direction being parallel to the first monolithic tab layer (121) after straightening.

4. A battery according to claim 3, wherein the post structure (30) is provided with a through hole (31), and at least a part of the area where the first tab (12) is connected to the end face (114) is disposed opposite to the through hole (31).

5. The battery according to claim 4, wherein the first one-piece tab layer (121) of the plurality of first one-piece tab layers (121) that is farthest from a center line of the end face (114) extending in the first direction is disposed directly opposite the through hole (31) after being straightened.

6. The battery according to claim 5, wherein the plurality of first single tab layers are folded to form the first tab (12), and the first tab (12) is disposed in the through hole (31).

7. The battery according to claim 1, wherein a through hole (31) is provided in the post structure (30), and the first tab (12) is inserted into the through hole (31).

8. The battery according to claim 1, wherein the post structure (30) is provided with a through hole (31), the battery further comprises an adapter (40), the adapter (40) is connected to one side of the first tab (12) away from the cell main body (11), and the adapter (40) is inserted into the through hole (31) and is electrically connected with the post structure (30).

9. The battery according to any one of claims 4 to 8, characterized in that the through hole (31) is provided in the middle of the post structure (30).

10. The battery according to claim 9, characterized in that the through hole (31) is provided in a central region of the post structure (30).

11. The battery according to any one of claims 1 to 8, wherein the battery is a quadrangular-type battery.

12. The battery according to any one of claims 1 to 8, wherein the cell (10) further comprises a second tab (13), the first tab (12) and the second tab (13) extending from the same end of the cell body (11).