CN215008377U

CN215008377U - Battery, battery module and battery pack

Info

Publication number: CN215008377U
Application number: CN202121041181.4U
Authority: CN
Inventors: 潘芳芳; 许久凌; 齐彬伟; 张勇杰
Original assignee: CALB Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-03
Anticipated expiration: 2031-05-14

Abstract

The utility model relates to the technical field of batteries, and provides a battery, a battery module and a battery pack, wherein the battery comprises a battery surface and a pole assembly, the battery surface is provided with a recess, the recess comprises a bottom wall and a side wall, and at least part of the side wall is not parallel to the width direction of the battery; the post assembly is disposed on the bottom wall. Through setting up utmost point post subassembly in the sunken of battery surface to can avoid utmost point post subassembly to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

Description

Battery, battery module and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery, battery module and battery package.

Background

The battery post in the correlation technique all protrudes the battery setting, because the battery post protrudes the setting, has occupied certain space of battery, and space utilization of follow-up battery when in groups is lower, and then has reduced the energy density and the percentage of groups of battery module.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery, battery module and battery package to improve the battery structure.

According to a first aspect of the present invention, there is provided a battery, comprising:

the battery comprises a battery surface, wherein a recess is arranged on the battery surface, the recess comprises a bottom wall and a side wall, and at least part of the side wall is not parallel to the width direction of the battery;

the utmost point post subassembly, utmost point post subassembly sets up on the diapire.

The utility model discloses the battery includes battery surface and utmost point post subassembly, and utmost point post subassembly sets up in the sunken of battery surface to can avoid utmost point post subassembly to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

According to a second aspect of the present invention, there is provided a battery, comprising:

the battery comprises a battery surface, wherein a recess is formed in the battery surface, the recess only comprises a bottom wall and two opposite side walls, and the two side walls are parallel to the width direction of the battery;

According to the third aspect of the present invention, a battery module is provided, which includes the above battery.

The utility model discloses battery module's battery includes battery surface and utmost point post subassembly, and utmost point post subassembly sets up in the sunken on battery surface to can avoid utmost point post subassembly to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

According to a fourth aspect of the present invention, there is provided a battery pack, including the above battery.

The utility model discloses battery of battery package includes battery surface and utmost point post subassembly, and utmost point post subassembly sets up in the sunken on battery surface to can avoid utmost point post subassembly to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

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 be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic illustration of a partial structure of a battery according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partially exploded structure of a battery according to an exemplary embodiment;

fig. 3 is a partially exploded structural schematic view of a battery case according to an exemplary embodiment.

The reference numerals are explained below:

10. a battery body; 11. recessing; 111. a bottom wall; 112. a side wall; 12. a first surface; 13. a second surface; 14. an electric core; 141. a cell main body; 142. a tab; 15. a housing; 151. a first housing member; 152. a second housing member; 153. an accommodating chamber; 154. a flange; 20. the utmost point post subassembly.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the 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, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 3, the battery includes: the battery comprises a battery body 10, wherein a recess 11 is arranged on the battery body 10, the recess 11 comprises a bottom wall 111 and a side wall 112, and at least part of the side wall 112 is not parallel to the width direction of the battery body 10; the pole assembly 20, the pole assembly 20 is disposed on the bottom wall 111.

The utility model discloses a battery of embodiment includes battery body 10 and utmost point post subassembly 20, and utmost point post subassembly 20 sets up in battery body 10's sunken 11 to can avoid utmost point post subassembly 20 to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

It should be noted that the recess 11 includes a bottom wall 111 and a side wall 112, that is, the bottom wall 111 and the side wall 112 enclose the recess 11, and a downward recess 11 is formed on the battery body 10, so that the pole assembly 20 is prevented from excessively protruding out of the battery body 10.

Optionally, the post assembly 20 protrudes out of the battery body 10, so that the top end of the post assembly 20 is higher than the top end of the battery body 10, that is, the depth of the recess 11 may be smaller than the height of the post assembly 20 above the bottom wall 111, so that a part of the post assembly 20 protrudes out of the battery body 10. The top end of the pole assembly 20 can be understood to be the end of the pole assembly 20 distal from the bottom wall 111, while the top end of the battery body 10 can be understood to be the surface of the battery body 10 proximate to the top end of the pole assembly 20. Further, the battery body 10 is horizontally placed, the pole assembly 20 extends in the vertical direction, at this time, one surface of the pole assembly 20 located at the highest point is the top end of the pole assembly 20, and correspondingly, one surface of the battery body 10 located at the highest point is the top end of the battery body 10. The top end here is focused on the positional relationship between the terminal post assembly 20 and the battery body 10, and does not particularly indicate the top end in which the terminal post assembly is disposed in any direction.

Alternatively, the top end of the pole assembly 20 is not higher than the top end of the battery body 10, that is, the depth of the recess 11 may be greater than the height of the pole assembly 20 above the bottom wall 111, or the depth of the recess 11 may be equal to the height of the pole assembly 20 above the bottom wall 111.

It is to be noted that at least part of the side wall 112 of the recess 11 is not parallel to the width direction of the battery body 10. The battery body 10 has a length direction and a width direction, and both the length direction and the width direction are linear directions, the length direction may be a longer extending direction of the battery body 10, and the width direction may be a shorter extending direction of the battery body 10, that is, the length of the battery body 10 is greater than the width of the battery body 10. The side wall 112 may be a curved surface so as to avoid being parallel to the width direction of the battery body 10, or the side wall 112 may be composed of a plurality of planes, ensuring that at least one of the plurality of planes is not parallel to the width direction of the battery body 10, for example, the side wall 112 may include two planes extending in the length direction of the battery body 10 and one plane extending in the width direction of the battery body 10. In this embodiment, the length of the battery body 10 may not be smaller than the width of the battery body 10.

Alternatively, the battery body 10 may have an approximately rectangular structure, that is, the battery body 10 may have a rectangular structure while neglecting manufacturing errors and the like.

In one embodiment, as shown in fig. 1, the battery body 10 includes two opposite first surfaces 12 and four second surfaces 13 disposed around the first surfaces 12, i.e., the battery body 10 has an approximately rectangular structure, and the area of the first surfaces 12 is larger than that of the second surfaces 13; wherein the recess 11 is arranged on the first surface 12, so that it can be ensured that the pole assembly 20 has a reliable supporting surface, thereby ensuring the stability of the pole assembly 20.

It should be noted that the two opposite first surfaces 12 are large surfaces of the battery body 10, the four second surfaces 13 are small surfaces of the battery body 10, the four second surfaces 13 include two pairs of small surfaces, i.e., a first pair of small surfaces extending along the length direction of the battery body 10 and a second pair of small surfaces extending along the width direction of the battery body 10, and the areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but smaller than the areas of the large surfaces. When the recess 11 is disposed on the first surface 12, the depth direction of the recess 11 is the height direction of the battery body 10.

In some embodiments, the recess 11 may be disposed in the middle of the first surface 12, that is, the sidewall 112 of the recess 11 does not intersect with the circumferential edge of the first surface 12, and the middle is not particularly limited to the middle, and the middle of the first surface 12 may be interpreted as the middle of the first surface as long as the sidewall does not intersect with the circumferential edge of the first surface 12.

In some embodiments, the recess 11 is disposed at the end of the first surface 12, so that the sidewall 112 intersects with the at least one second surface 13, that is, the recess 11 at least includes two openings, the terminal post assembly 20 is disposed at the end of the battery body 10, so that the terminal post assembly 20 can be conveniently mounted, and the recess 11 can be conveniently formed.

In one embodiment, as shown in fig. 1 and fig. 2, both ends of the sidewall 112 intersect with one second surface 13, that is, the recess 11 includes two openings, one opening is located on the surface of the first surface 12, and the other opening is located on the surface of the second surface 13, in which case, the sidewall 112 may be a curved surface, a plurality of flat surfaces, or a combination of flat surfaces and curved surfaces.

Alternatively, both ends of the sidewall 112 intersect with one second surface 13 extending in the length direction of the battery body 10.

Alternatively, the two ends of the side wall 112 intersect with a second surface 13 extending along the width direction of the battery body 10, and the design position may not occupy too much of the position of the battery body 10 for disposing the battery cell 14, so as to ensure that the battery has sufficient energy density.

In one embodiment, as shown in fig. 3, the recess 11 is disposed at a position where the first surface 12 is close to where two adjacent second surfaces 13 intersect, so that two ends of the sidewall 112 intersect with two adjacent second surfaces 13, respectively, that is, the recess 11 is disposed at a corner position of the battery body 10, so that the pole assembly 20 can be disposed at the corner position of the battery body 10, which can ensure that the battery body 10 can reliably support the pole assembly 20, and can provide reliable support when connecting the pole assembly 20. The recess 11 in this embodiment comprises three openings, one opening being located in the plane of the first surface 12 and two other openings being located in the plane of the adjacent second surfaces 13.

In some embodiments, the bottom wall 111 may be inclined to the width direction of the battery body 10, that is, the bottom wall 111 is not parallel to the width direction of the battery body 10, and it is further understood that when the battery is horizontally placed, the bottom wall 111 is inclined to the horizontal plane.

In some embodiments, at least a portion of the bottom wall 111 is parallel to the surface of the battery body 10 provided with the recess 11, i.e. when the battery is placed horizontally, at least a portion of the bottom wall 111 is parallel to the horizontal plane, which can facilitate the installation of the pole assembly 20.

In one embodiment, as shown in fig. 2, the battery body 10 includes: the battery cell 14, the battery cell 14 is connected with the pole assembly 20; the battery cell 14 is positioned in the shell 15; wherein, sunken 11 sets up on casing 15, and utmost point post subassembly 20 is installed on casing 15 promptly, not only easy to assemble and the structure is simple relatively, can utilize casing 15 to carry out utmost point post subassembly 20's installation.

Alternatively, the housing 15 may be made of stainless steel or aluminum, and has good corrosion resistance and sufficient strength.

In some embodiments, the recess 11 may be disposed on a structure outside the housing 15 to accommodate the installation position of the pole assembly 20, based on the connection between the pole assembly 20 and the battery cell 14.

In one embodiment, the housing 15 includes a first area portion and a second area portion, the recess 11 being provided at the first area portion; in this case, the thickness of the first region is equal to the thickness of at least a part of the second region, that is, after the recess 11 is formed in the case 15, the case 15 is not required to be particularly thinned, and an increase in the number of processing steps can be avoided.

In one embodiment, the thickness of the shell 15 is uniform, which not only has strong structural stability, but also can facilitate processing.

In one embodiment, as shown in fig. 2 and 3, the housing 15 includes: a first housing member 151; a second housing part 152, the second housing part 152 being connected to the first housing part 151 to enclose the cells 14; wherein the recess 11 is provided on the first housing piece 151 or the second housing piece 152. The first housing part 151 and the second housing part 152 are respectively arranged, so that the installation of the battery cell 14 can be facilitated, and the processing is also more convenient.

Optionally, the first housing part 151 and the second housing part 152 may both form accommodating cavities 153, and after the first housing part 151 and the second housing part 152 are butted, the battery cell 14 is located in a cavity formed by the two accommodating cavities 153. The first housing part 151 and the second housing part 152 may have the same or different depths of the receiving cavities 153, and are not limited herein.

Optionally, the first housing part 151 is a flat plate, and the second housing part 152 is formed with a receiving cavity 153, as shown in fig. 2, the battery cell 14 is located in the receiving cavity 153, the flat plate can facilitate subsequent connection, and the processing difficulty is low.

Further, the circumferential edge of the second housing member 152 is provided with a flange 154, and the first housing member 151 is welded to the flange 154, so that reliable welding of the first housing member 151 and the second housing member 152 can be ensured, and stability of connection can be provided. The flange 154 is provided primarily to ensure an increased area for welding and thus to improve the stability of the weld.

Alternatively, when the first housing part 151 has the receiving cavity 153, the circumferential edge of the first housing part 151 may also be provided with a flange 154, as shown in fig. 2, and the flange 154 of the first housing part 151 is welded to the flange 154 of the second housing part 152.

It should be noted that the flange 154 may be understood as a flange, for example, a flange extending outward from a circumferential outer edge of a flat plate, or a flange extending outward from a sidewall of a structure having the receiving cavity 153, where the flange is substantially perpendicular to the sidewall. Reference is made to the arrangement of the flanges 154 on the circumferential edges of the first and

second housing pieces

151 and 152 mentioned in the above embodiments, so that the flanges 154 of the first and

second housing pieces

151 and 152 can directly oppose each other, thereby facilitating the connection.

In one embodiment, as shown in fig. 2, the battery cell 14 includes a cell main body 141 and a tab 142, where the tab 142 extends from the length direction of the cell main body 141; the tab 142 is connected to the terminal assembly 20, and the terminal assembly 20 can be disposed at the end of the battery body 10, so that the connection is facilitated and the length and space of the battery can be fully utilized. The tab 142 and the post assembly 20 may be directly connected, that is, the tab 142 and the post assembly 20 may be directly welded, or the tab 142 and the post assembly 20 may be connected by a metal adapter, and the specific connection mode may be welding, or riveting, and the like, and the connection mode is not limited herein.

It should be noted that the cell main body 141 includes more than two pole pieces, the tab 142 includes more than two single-piece tabs, the single-piece tabs respectively extend from the pole pieces corresponding to the single-piece tabs, the width of the single-piece tabs is smaller than the width of the pole pieces, a plurality of single-piece tabs are stacked together to form the tab 142, and the tab 142 is connected to the pole assembly 20, wherein the tab 142 can be welded to the pole assembly 20. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, nickel, or the like.

In some embodiments, there are two pole assemblies 20, two pole assemblies 20 are a positive pole assembly and a negative pole assembly, respectively, there are two tabs 142, two tabs 142 are a positive tab and a negative tab, respectively, the positive pole assembly is connected to the positive tab, and the negative pole assembly is connected to the negative tab. The battery body 10 may be provided with two recesses 11, and the two pole assemblies 20 are respectively disposed in the two recesses 11, or only one of the two pole assemblies 20 is disposed in the recess 11, and the other one protrudes out of the battery body 10. Both pole assemblies 20 may be disposed on the same first surface 12, or both pole assemblies 20 may be disposed on both first surfaces 12, respectively. The arrangement position and the specific structure of the two pole assemblies 20 are not limited.

It should be noted that the pole assembly 20 and the housing 15 are insulated from each other, for example, the two may be insulated by an insulating member, or may be insulated by an insulating coating, which is not limited herein and may be selected according to actual needs.

In one embodiment, the portion of the sidewall 112 close to the battery cell 14 is inclined toward the side away from the battery cell 14, which not only facilitates the processing, but also increases the distance between the battery cell 14 and the casing 15, thereby avoiding the electrical connection between the battery cell 14 and the casing 15.

It should be noted that, the inclination angle of the side wall 112 is 1 degree to 20 degrees, that is, when the recessed bottom wall 111 is horizontally disposed, the inclination angle of the side wall 112 with respect to the vertical direction is 1 degree to 20 degrees, and this angle not only has a low difficulty in processing and forming, but also can avoid the problem of interference between the pole assembly 20 and the side wall 112.

In one embodiment, at least a portion of the bottom wall 111 is in arc transition with at least one of the outer surface of the battery body 10 and the side wall 112, and/or at least a portion of the side wall 112 is in arc transition with the outer surface of the battery body 10, which not only facilitates the processing and forming, but also does not affect the assembly of the battery cell 14.

It should be noted that a first arc angle is arranged between the bottom wall 111 and the side wall 112, a second arc angle is arranged between the bottom wall 111 and the outer surface of the battery body 10, and the second arc angle is larger than the first arc angle, which is convenient for processing. A third arc angle is provided between the side wall 112 and the outer surface of the battery body 10.

In one embodiment, the length of the cell is a, 400mm a 2500mm, the width of the cell is b, the height of the cell is c, 2b a 50b, and/or 0.5c b 20 c.

Furthermore, b is more than or equal to 50mm and less than or equal to 200mm, and c is more than or equal to 10mm and less than or equal to 100 mm.

Preferably, 4 b.ltoreq.a.ltoreq.25 b, and/or 2 c.ltoreq.b.ltoreq.10 c.

In the battery in the above embodiment, the ratio of the length to the width of the battery is large, and further, the ratio of the width to the height of the battery is large, while sufficient energy density is ensured.

In one embodiment, the length of the battery is a, the width of the battery is b, and a is greater than or equal to 4b and less than or equal to 7b, i.e., the ratio of the length to the width of the battery in the embodiment is larger, so that the energy density of the battery is increased, and the subsequent formation of the battery module is facilitated.

In one embodiment, the height of the battery is c, b is more than or equal to 3c and less than or equal to 7c, and the ratio of the width to the height of the battery is larger, so that the battery is convenient to form under the condition of ensuring enough energy density.

Alternatively, the length of the cell may be 500mm to 1500mm, the width of the cell may be 80mm to 150mm, and the height of the cell may be 15mm to 25 mm.

The length of the battery is a dimension in the battery length direction, the width of the battery is a dimension in the battery width direction, and the height of the battery is a dimension in the battery height direction, that is, the thickness of the battery.

In one embodiment, the batteries are laminated batteries, which are convenient to pack and can be processed to obtain batteries with longer length.

Specifically, the battery cell 14 is a laminated battery cell, and the battery cell 14 has a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm disposed between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Optionally, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

It should be noted that the battery surface is understood to be the outer surface of the battery body 10, that is, the recess 11 and the pole assembly 20 are both disposed on the battery surface, and further, the recess 11 and the pole assembly 20 are both disposed on the first surface 12 of the battery surface, and the above embodiments are all described by disposing the components on the battery body 10.

An embodiment of the utility model also provides a battery, include: the battery comprises a battery body 10, wherein a recess 11 is formed in the battery body 10, the recess 11 only comprises a bottom wall 111 and two opposite side walls 112, and the two side walls 112 are parallel to the width direction of the battery body 10; the pole assembly 20, the pole assembly 20 is disposed on the bottom wall 111.

Compared with the above embodiment, the recess 11 in the present embodiment includes two side walls 112, and the two side walls 112 are parallel, that is, two ends of the recess 11 penetrate two opposite surfaces of the battery body 10, for example, when the recess 11 is disposed on the first surface 12, two ends of the recess 11 penetrate two opposite second surfaces 13, so that the recess 11 has three openings. When the size of the battery body 10 is large, at least two battery cells are not required to be connected to form the battery body 10, and the at least two battery cells are electrically connected with the pole assemblies in the recesses after being connected, so that the requirement of a large-size battery is met, and the energy density of the battery is further improved. For the structure of the battery, which is not described herein, reference may be made to the above embodiments, and the specific structure of the recess 11 is emphasized in this embodiment. For example, the battery in the present embodiment may be a laminated battery or the like.

An embodiment of the utility model also provides a battery module, including foretell battery.

The utility model discloses a battery of battery module of embodiment includes battery body 10 and utmost point post subassembly 20, and utmost point post subassembly 20 sets up in battery body 10's sunken 11 to can avoid utmost point post subassembly 20 to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

In some embodiments, the battery module includes at least two batteries, the at least two batteries are arranged in parallel, and the first surfaces 12 of the two battery bodies 10 are oppositely arranged, so that the battery module is grouped, and since the post assembly 20 is disposed in the recess 11 of the battery body 10, it is possible to ensure that the gap between the adjacent two batteries is minimized.

An embodiment of the utility model also provides a battery package, including foretell battery module.

The utility model discloses a battery package of embodiment includes the battery module, and the battery of battery module includes battery body 10 and utmost point post subassembly 20, and utmost point post subassembly 20 sets up in battery body 10's sunken 11 to can avoid utmost point post subassembly 20 to occupy the battery module space when the battery is in groups, promoted the energy density and the space utilization of battery.

Optionally, the battery pack includes at least two battery modules, and the battery pack may further include a box body, and the at least two battery modules are disposed in the box body.

An embodiment of the utility model also provides a battery package, including foretell battery.

The utility model discloses a battery of battery package of embodiment includes battery body 10 and utmost point post subassembly 20, and utmost point post subassembly 20 sets up in battery body 10's sunken 11 to can avoid utmost point post subassembly 20 to occupy the battery module space when the battery is in groups, promote the energy density and the space utilization of battery.

In some embodiments, the battery pack includes at least two batteries, the at least two batteries are arranged in parallel, and the first surfaces 12 of the two battery bodies 10 are arranged oppositely, so as to form a battery module, and since the post assembly 20 is arranged in the recess 11 of the battery body 10, it is ensured that the gap between the adjacent two batteries is minimized. The battery in this embodiment can be directly placed in the box to form a battery pack.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention 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. 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 will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that 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

1. A battery, comprising:

a battery surface on which a recess (11) is provided, the recess (11) comprising a bottom wall (111) and a side wall (112), at least part of the side wall (112) being non-parallel to a width direction of the battery;

a pole assembly (20), the pole assembly (20) being disposed on the bottom wall (111).

2. The battery according to claim 1, wherein the battery surface comprises two opposing first surfaces (12) and four second surfaces (13) arranged around the first surfaces (12), the first surfaces (12) having an area larger than the second surfaces (13);

wherein the recess (11) is provided on the first surface (12).

3. The battery according to claim 2, characterized in that the recess (11) is provided at the end of the first surface (12) so that the side wall (112) intersects at least one of the second surfaces (13).

4. The battery according to claim 3, wherein both ends of the side wall (112) intersect one of the second surfaces (13).

5. The battery according to claim 4, wherein both ends of the side wall (112) intersect with one of the second surfaces (13) extending in the battery width direction.

6. The battery according to claim 3, wherein both ends of the side wall (112) intersect with two adjacent second surfaces (13), respectively.

7. The battery according to any one of claims 1 to 6, characterized in that at least part of the bottom wall (111) is parallel to the surface of the battery surface provided with the depression (11).

8. The battery according to any one of claims 1 to 6, characterized in that the battery comprises:

a battery cell (14), wherein the battery cell (14) is connected with the pole assembly (20);

a housing (15), the battery cell (14) being located within the housing (15);

wherein the recess (11) is provided on the housing (15).

9. The battery according to claim 8, wherein the case (15) includes a first region portion and a second region portion, the recess (11) being provided at the first region portion;

wherein the thickness of the first region part is identical to the thickness of the second region part.

10. The battery according to claim 8, wherein the case (15) comprises:

a first housing member (151);

a second housing part (152), the second housing part (152) being connected to the first housing part (151) in order to enclose the electrical core (14);

wherein the recess (11) is provided on the first housing part (151) or the second housing part (152).

11. The battery according to claim 10, wherein at least one of the first and second case members (151, 152) is formed with a receiving cavity (153);

wherein a flange (154) is provided on a circumferential edge of at least one of the first and second housing pieces (151, 152).

12. The battery of claim 8, wherein the cell (14) comprises a cell body (141) and a tab (142), the tab (142) extending from a length of the cell body (141);

wherein the tab (142) is connected with the pole assembly (20).

13. The battery according to claim 8, characterized in that the portion of the side wall (112) close to the cell (14) is inclined toward the side away from the cell (14).

14. The battery according to any one of claims 1 to 6, characterized in that at least part of the bottom wall (111) transitions into a circular arc with at least one of the battery surface and the side wall (112), and/or at least part of the side wall (112) transitions into a circular arc with the battery surface.

15. The battery according to any one of claims 1 to 6, wherein the length of the battery is a, the width of the battery is b, the height of the battery is c, 2b ≦ a ≦ 50b, and/or, 0.5c ≦ b ≦ 20 c;

400mm≤a≤2500mm。

16. the battery according to any one of claims 1 to 6, characterized in that the battery is a laminated battery.

17. A battery, comprising:

the battery comprises a battery surface, wherein a recess (11) is formed in the battery surface, the recess (11) only comprises a bottom wall (111) and two opposite side walls (112), and the two side walls (112) are both parallel to the width direction of the battery;

18. A battery module characterized by comprising the battery according to any one of claims 1 to 17.

19. A battery pack comprising the battery according to any one of claims 1 to 17.