CN220544183U - Battery - 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

Technical field

The utility model relates to the field of battery technology, and in particular to a battery.

Background technique

In the related technology, the battery core can be drawn out using all tabs. After the tabs are bundled, serious misalignment may occur, and the overall thickness increases after the tabs are bent, resulting in low utilization of the internal space of the battery, thus affecting the battery. usage performance.

Utility model content

The utility model provides a battery to improve the performance of the battery.

The utility model provides a battery, which includes:

The battery core includes a battery core body and a first pole piece. The battery core body includes a first pole piece. The first pole piece extends from the first pole piece. The first pole piece includes a plurality of first cells arranged in a stack. The pole piece layer, the first tab includes a plurality of first monolithic tab layers arranged in a stack, the first monolithic tab layer extends from the first monolithic tab layer, and the first monolithic tab layer The ratio of the total number of layers to the total number of first monolithic pole piece layers is 0.31-0.92;

Shell, the battery core is arranged in the shell, the shell includes a cover plate and a shell part, the shell part includes a side wall section and a bottom wall section, the side wall section and the bottom wall section are an integral structure, the cover plate and the side wall The sections are connected, and the cover plate and the bottom wall section are arranged oppositely;

The pole structure is arranged on the bottom wall section and is electrically connected to the battery core.

The battery in the embodiment of the present utility model includes a battery core, a casing and a pole structure. The pole structure is electrically connected to the battery core. The casing includes a cover plate and a casing part. The side wall section and the bottom wall section of the casing part are integrated. In the molded structure, the pole structure is arranged on the bottom wall section, thereby rationally utilizing the space of the shell parts and improving the structural stability of the shell. The battery core includes a battery core body and a first pole piece. The first pole piece of the battery core body is formed of a plurality of first monolithic pole piece layers arranged in a stack. The first pole piece is composed of a plurality of stacked first monolithic pole pieces. The tab layer is formed by causing the first monolithic tab layer to extend from the first monolithic tab layer, and the total number of the first monolithic tab layer is equal to the total number of the first monolithic tab layer. The ratio is 0.31-0.92, that is, the total number of the first monolithic tab layer is less than the total number of the first monolithic tab layer, which can not only reduce the risk of misalignment after the first monolithic tab layer is gathered, but also ensure Based on the overcurrent capacity of the first tab, the overall thickness of the first tab will not be too large, thereby improving the utilization of the internal space of the battery, thereby reliably improving the performance of the battery.

Description of drawings

For a better understanding of the disclosure, reference may be made to the embodiments illustrated in the following drawings. Parts in the drawings are not necessarily to scale, and relevant elements may be omitted in order to emphasize and clearly illustrate technical features of the present disclosure. Additionally, related elements or components may have different arrangements as is known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components in the respective drawings. in:

Figure 1 is a schematic structural diagram of a battery according to an exemplary embodiment;

Figure 2 is a schematic partial cross-sectional structural diagram of a battery according to an exemplary embodiment;

Figure 3 is a schematic partial cross-sectional structural diagram of a battery according to another exemplary embodiment;

Figure 4 is a schematic structural diagram of a battery cell according to an exemplary embodiment;

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

The reference symbols are explained as follows:

10. Battery core; 11. Battery core body; 111. First pole piece; 1111. First single pole piece layer; 112. Second pole piece; 113. Diaphragm; 114. End face; 12. First pole tab; 121. The first monolithic tab layer; 13. The second tab; 20. Shell; 21. Cover plate; 22. Case piece; 221. Side wall section; 222. Bottom wall section; 30. pole structure ; 31. Through hole; 40. Adapter.

Detailed ways

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. Therefore, it should be understood that various modifications may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

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

Unless otherwise specified or stated, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal. Connection; "Connection" can be a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

Further, in the description of the present disclosure, it should be understood that the directional terms such as “upper”, “lower”, “inner”, and “outer” described in the exemplary embodiments of the present disclosure are from the angle shown in the drawings. This description should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that when the context refers to one element or feature being connected to "on", "below", "in" or "outside" another element(s), it is not merely directly connected. "on", "below" or "inside" or "outside" another element (one or more), or can also be indirectly connected to another element (one or more) "on", "below" or "outside" through an intermediate element. inside and outside".

One embodiment of the present invention provides a battery. Please refer to Figures 1 to 5. The battery includes: a battery core 10. The battery core 10 includes a battery core body 11 and a first tab 12. The battery core body 11 includes a first battery lug. The pole piece 111 and the first pole piece 12 extend from the first pole piece 111. The first pole piece 111 includes a plurality of first single piece pole piece layers 1111 arranged in a stack. The first pole piece 12 includes a plurality of stacked pole pieces. The first monolithic tab layer 121 extends from the first monolithic tab layer 1111, and the total number of the first monolithic tab layer 121 is the same as the first monolithic tab layer 1111. The ratio of the total number of sheets 1111 is 0.31-0.92; the housing 20, the battery core 10 is arranged in the housing 20, the housing 20 includes a cover plate 21 and a housing part 22, the housing part 22 includes a side wall section 221 and a The bottom wall section 222, the side wall section 221 and the bottom wall section 222 are one-piece structures, the cover plate 21 is connected to the side wall section 221, and the cover plate 21 and the bottom wall section 222 are arranged oppositely; the pole structure 30, the pole The structure 30 is disposed on the bottom wall section 222 and is electrically connected to the battery core 10 .

A battery according to one embodiment of the present invention includes a battery core 10, a casing 20 and a pole structure 30. The pole structure 30 is electrically connected to the battery core 10. The casing 20 includes a cover plate 21 and a casing part 22. The casing part 22 The side wall section 221 and the bottom wall section 222 are one-piece structures, and the pole structure 30 is arranged on the bottom wall section 222, thereby rationally utilizing the space of the housing member 22 and improving the structural stability of the housing 20. The battery core 10 includes a battery core body 11 and a first pole piece 12. The first pole piece 111 of the battery core body 11 is formed by a plurality of first monolithic pole piece layers 1111 arranged in a stack. The first pole piece 12 is composed of a plurality of stacked first pole piece layers 1111. The stacked first monolithic tab layer 121 is formed by making the first monolithic tab layer 121 extend from the first monolithic tab layer 1111 , and the total number of the first monolithic tab layer 121 is equal to The ratio of the total number of first monolithic pole piece layers 1111 is 0.31-0.92, that is, the total number of first monolithic tab layers 121 is less than the total number of first monolithic pole piece layers 1111, which not only reduces the The risk of mis-layering after the tab layer 121 is closed, and on the basis of ensuring the over-current capability of the first tab 12, the overall thickness of the first tab 12 will not be too large, thereby improving the internal space utilization of the battery, thereby ensuring reliability Improve battery performance.

It should be noted that, as shown in FIGS. 1 to 4 , the battery core 10 includes a battery core body 11 and a first pole lug 12 extending from the battery core body 11 . The first pole lug 12 can be connected with the pole structure 30 Electrical connection.

A battery consists of a cell and an electrolyte, the smallest unit capable of performing electrochemical reactions such as charging/discharging. An electric core refers to a unit formed by winding or laminating a stacked portion, which includes a first pole piece, a separator, and a second pole piece. When the first pole piece is the positive pole piece, the second pole piece is the negative pole piece. Wherein, the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active material.

As shown in FIG. 5 , a separator 113 may be provided between the first pole piece 111 and the second pole piece 112 . The first pole piece 111 shown in FIG. 5 is formed of a plurality of first monolithic pole piece layers 1111 , and The structure of the second pole piece 112 and the separator 113 is not divided, and only the positional relationship with the first single pole piece layer 1111 is shown.

The battery core 10 may be a wound battery core. In this case, multiple 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; or, The battery core 10 may be a laminated battery core. In this case, the plurality of first monolithic pole piece layers 1111 of the first monolithic pole piece layer 1111 are independently provided.

The first pole piece 111 includes a plurality of first monolithic pole piece layers 1111 arranged in a stack, and the first tab 12 includes a plurality of first monolithic tab layers 121 arranged in a stack. 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 layer 121 may be less than the first monolithic tab layer 1111 The total number, that is, the first monolithic tab layer 121 may not be drawn from at least one first monolithic tab layer 1111. Compared with the full tab structure, the formation of multiple first monolithic tab layers 121 can be reduced. The thickness of the first pole tab 12 is reduced, and the probability of mis-layering between the first monolithic pole piece layers 1111 will 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 possibility of mis-layering between the first monolithic pole piece layers 1111 can be reduced. Chances are, the overall thickness of the first pole lug 12 is reduced when bent, making the internal space utilization of the battery higher.

The ratio of the total number of the first monolithic tab layer 121 to the total number of the first monolithic pole piece layer 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 plate 21 and a case part 22 . The cover plate 21 and the case part 22 are connected, thereby realizing the storage of the battery core 10 .

The shell member 22 includes a side wall section 221 and a bottom wall section 222. The side wall section 221 and the bottom wall section 222 are an integral structure, which not only ensures the structural strength of the side wall section 221 and the bottom wall section 222, but also ensures the side wall section 221 and the bottom wall section 222. The forming efficiency of the wall section 221 and the bottom wall section 222 further controls the manufacturing efficiency of the battery.

The cover plate 21 and the side wall section 221 are connected. For example, the cover plate 21 and the side wall section 221 can be welded. The cover plate 21 and the side wall section 221 can be connected by laser welding, resistance welding or ultrasonic welding.

As shown in FIG. 1 , the pole structure 30 is disposed on the bottom wall segment 222 , and the bottom wall segment 222 can be disposed opposite to the cover 21 . When the batteries are grouped, the pole structure 30 can be directed toward the top of the battery box. At this time, the cover plate 21 can form a support for the battery core 10. Of course, it is not ruled out that the pole structure 30 can face the bottom end of the battery box.

In one embodiment, the battery core 10 is a wound battery core, which not only can effectively control the molding efficiency of the battery core 10 and improve the efficiency of battery manufacturing, but also allows the total number of the first monolithic tab layer 121 to be smaller than the first When the total number of single pole piece layers 1111 is reduced, the battery core 10 can fully exert its electrical performance.

The battery core 10 may be a square battery core. After being rolled to form the battery core 10, the battery core 10 may be flattened to form a square battery core. At this time, the first pole piece 111 includes a plurality of stacked first electrodes. The monolithic pole piece layer 1111 and the adjacent first monolithic pole piece layers 1111 are connected, and the first tab 12 includes a plurality of first monolithic tab layers 121 arranged in a stack. The 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 cell body 11 extending from the first tab 12 has a centerline extending along a first direction. The first tab 12 is arranged asymmetrically with respect to the centerline, and the first direction is parallel to the straightening direction. The subsequent first monolithic tab layer 121 , that is, the first tab 12 can be offset, thereby facilitating the convergence of the first tab 12 and lowering the first monolithic tab layer of the first tab 12 121The probability of misalignment.

As shown in FIG. 4 , the first direction can be represented as A, and the end surface 114 of the cell body 11 can have a center line parallel to the first direction. At this time, the first tab 12 is arranged asymmetrically with respect to the center line, that is, It means that the first pole tab 12 can be arranged to a certain side of the center line. As shown in FIG. 4 , the first pole tab 12 is biased as a whole.

The first tab 12 is formed by a plurality of first monolithic tab layers 121. After the first monolithic tab layer 121 is straightened, it can be considered that the first monolithic tab layer 121 has a large flat surface. At this time , the first direction is parallel to the first monolithic tab layer 121 . The first direction can also be considered as the length direction of the end surface 114 .

In one embodiment, the pole structure 30 is provided with a through hole 31 , and at least part of the area connecting the first pole lug 12 and the end surface 114 is disposed directly opposite the through hole 31 , so that the through hole 31 of the pole structure 30 can pass through. The positioning of the first tab 12 can be achieved, thereby improving the connection accuracy of the first tab 12 and thus improving the manufacturing efficiency of the battery.

The area where the first tab 12 is connected to the end surface 114 can be considered as the area formed by the root portion connecting each first monolithic tab layer 121 to the corresponding first monolithic tab layer 1111. By making the first tab At least part of the area connecting 12 to the end surface 114 is disposed directly opposite the through hole 31, so that the first tab 12 can be positioned through the through hole 31. For example, it is convenient to realize that the first tab 12 is inserted into the through hole 31. or, through the through hole 31 to form an electrical connection to the first tab 12 and the pole structure 30, etc.

In one embodiment, the first single-piece tab layer 121 among the plurality of first single-piece tab layers 121 that is farthest from the center line extending along the first direction of the end surface 114 is straightened and disposed directly opposite the through hole 31, As a result, the first monolithic tab layer 121 located at the end can be arranged directly opposite the through hole 31, which not only improves the positioning ability of the first tab 12, but also facilitates the connection to the first tab 12. .

The area connecting the first tab 12 and the end surface 114 can be considered as a rectangular surface, and the end surface 114 has a center line extending along the first direction A. At this time, the rectangular surface extends along the second direction perpendicular to the first direction A. , the side farthest from the centerline can be considered to be formed by the first single-chip tab layer 121 that is farthest from the centerline extending along the first direction of the end surface 114 among the plurality of first monolithic tab layers 121, and this After being straightened, the first single-piece tab layer 121 is arranged to face the through hole 31 , that is, the side farthest from the center line is arranged to face the through hole 31 .

In one embodiment, as shown in FIG. 1 , a plurality of first monolithic tab layers are gathered together to form a first tab 12 , and the first tab 12 is inserted into the through hole 31 , so that the through hole 31 The first pole lug 12 is limited to facilitate the electrical connection between the pole structure 30 and the first pole lug 12 .

In one embodiment, as shown in Figures 1 and 2, the pole structure 30 is provided with a through hole 31, and the first pole lug 12 is inserted into the through hole 31, which not only facilitates the connection between the pole structure 30 and the third The electrical connection of the first tab 12 can improve the installation efficiency of the battery core 10, so that the first tab 12 forms the installation position of the battery core 10.

The first pole lug 12 may be directly connected to the pole structure 30, as shown in FIG. 2 .

The first pole lug 12 is inserted into the through hole 31, and the first pole lug 12 can be welded to the pole structure 30.

In one embodiment, as shown in FIG. 3 , the pole structure 30 is provided with a through hole 31 , and the battery also includes an adapter 40 . The adapter 40 is connected to the side of the first tab 12 away from the cell body 11 , the adapter 40 is disposed in the through hole 31 and is electrically connected to the pole structure 30. The arrangement of the adapter 40 can appropriately reduce the size of the first pole 12, and is beneficial to the battery core 10 and the pole structure 30. To form a connection, it is also convenient to control the adapter 40 to be inserted into the through hole 31 .

The first tab 12 and the adapter 40 may be connected by welding, or the first tab 12 and the adapter 40 may be connected by conductive glue, which is not limited here.

The adapter 40 and the pole structure 30 can be connected by welding.

In one embodiment, the through hole 31 is provided in the middle of the pole structure 30 , so that the pole structure 30 can effectively limit the first pole tab 12 and prevent the first pole tab 12 from being separated from the pole structure 30 .

In one embodiment, the through hole 31 is provided in the central area of the pole structure 30, which not only ensures the stability of the connection between the pole structure 30 and the first pole 12, but also effectively controls the structural strength of the pole structure 30 to avoid The pole structure 30 does not have the overcurrent capability, and the problem of partial fusing occurs.

It should be noted that the first pole tab 12 is inserted into the through hole 31. If the thickness of the first pole tab 12 is too large, it will be difficult to penetrate the first pole tab 12 into the through hole 31, which is not conducive to improving the installation. efficiency, and when the thickness of the first tab 12 is too large, the width of the through hole 31 will also be relatively large, which will affect the overcurrent capability of the pole structure 30 to a certain extent. By making the first monolithic tab layer 121 The ratio of the total number to the total number of the first monolithic electrode layer 1111 is 0.31-0.92, which can effectively control the thickness of the first tab 12, thereby reliably improving the manufacturing efficiency and safety performance of the battery.

In one embodiment, as shown in FIG. 4 , the battery core 10 further includes a second tab 13 . The first tab 12 and the second tab 13 extend from the same end of the battery core body 11 , thereby reducing the electric charge. The overall height of the core 10 is conducive to improving the space utilization of the battery, thereby controlling 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 body 11 .

In one embodiment, the battery may be a four-prism battery. A four-prism battery mainly refers to a prismatic battery, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not strictly limited. It must be a right angle, and it can be an arc transition.

The battery can be a stacked battery, which is not only convenient for grouping, but also can be processed to obtain a longer battery. Specifically, the battery core is a laminated battery core. The battery core has first pole pieces stacked on each other, a second pole piece electrically opposite to the first pole piece, and is arranged between the first pole piece and the second pole piece. diaphragm pieces, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery core.

Alternatively, the battery may be a wound battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the separator sheet disposed between the first pole piece and the second pole piece are rolled, Get the wound battery core.

In one embodiment, the battery may be a cylindrical battery, or the battery may be a hexagonal prismatic battery. The battery may be a rolled battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the separator piece disposed between the first pole piece and the second pole piece are rolled to obtain a rolled battery. Wound battery core.

One embodiment of the present invention also provides a battery pack, including the above-mentioned battery.

The battery pack of an embodiment of the present invention includes a battery core 10, a casing 20 and a pole structure 30. The pole structure 30 is electrically connected to the battery core 10. The casing 20 includes a cover 21 and a casing member 22. The side wall section 221 and the bottom wall section 222 of the body part 22 are integrally formed structures, and the pole structure 30 is arranged on the bottom wall section 222, thereby rationally utilizing the space of the housing part 22 and improving the structural stability of the housing 20 . The battery core 10 includes a battery core body 11 and a first pole piece 12. The first pole piece 111 of the battery core body 11 is formed by a plurality of first monolithic pole piece layers 1111 arranged in a stack. The first pole piece 12 is composed of a plurality of stacked first pole piece layers 1111. The stacked first monolithic tab layer 121 is formed by making the first monolithic tab layer 121 extend from the first monolithic tab layer 1111 , and the total number of the first monolithic tab layer 121 is equal to The ratio of the total number of first monolithic pole piece layers 1111 is 0.31-0.92, that is, the total number of first monolithic tab layers 121 is less than the total number of first monolithic pole piece layers 1111, which not only reduces the The risk of mis-layering after the tab layer 121 is closed, and on the basis of ensuring the over-current capability of the first tab 12, the overall thickness of the first tab 12 will not be too large, thereby improving the internal space utilization of the battery, thereby ensuring reliability Improve battery pack performance.

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

The battery module includes a plurality of batteries, and the battery module may also include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of batteries.

It should be noted that multiple batteries can be formed into a battery module and placed in the battery box, and the multiple batteries can be fixed through end plates and side plates. Multiple batteries can be directly installed in the battery box, that is, there is no need to group multiple batteries. At this time, the end plates and side plates can be removed.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present disclosure and include common knowledge or customary techniques in the technical field that are not disclosed in the present disclosure. means. It is intended that the specification and example embodiments be considered as 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 structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made 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).