CN219203390U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack, which comprises a plurality of batteries electrically connected, wherein the batteries are stacked along a first direction, and the batteries comprise: the battery shell is provided with a first recess and a second recess along the second direction at two opposite sides; the first pole assembly is arranged on the battery shell and at least partially positioned in the first recess so as to be positioned outside the battery shell; the second pole component is arranged on the battery shell and at least partially positioned in the second recess so as to be positioned outside the battery shell; the first direction is perpendicular to the second direction, so that the space utilization rate of the first pole component and the second pole component to the battery shell can be improved, the space of the battery pack is increased by preventing the first pole component and the second pole component from excessively protruding out of the surface of the battery shell, the space utilization rate of the battery pack is improved, and the service performance of the battery pack is improved.

Description

Battery pack

Technical Field

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

Background

In the related art, the battery pack can include a plurality of batteries, and a plurality of batteries all are connected through the utmost point post subassembly electricity, because the structural limitation of utmost point post subassembly, the utmost point post subassembly can occupy great space, is unfavorable for improving the space utilization of group battery.

Disclosure of Invention

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

The utility model provides a battery pack, comprising a plurality of batteries which are electrically connected, wherein the batteries are stacked along a first direction, and the batteries comprise:

the battery shell is provided with a first recess and a second recess along the second direction at two opposite sides;

the first pole assembly is arranged on the battery shell and at least partially positioned in the first recess so as to be positioned outside the battery shell;

the second pole component is arranged on the battery shell and at least partially positioned in the second recess so as to be positioned outside the battery shell;

wherein the first direction is perpendicular to the second direction.

The battery pack of the embodiment of the utility model comprises a plurality of batteries which are electrically connected, the batteries are stacked along a first direction, the batteries comprise a battery shell, a first pole component and a second pole component, and along a second direction, at least part of the first pole component is positioned in the first recess, at least part of the second pole component is positioned in the second recess, and the first direction is perpendicular to the second direction, so that the space utilization rate of the first pole component and the second pole component for the battery shell can be improved, the space of the battery pack is increased by preventing the first pole component and the second pole component from excessively protruding out of the surface of the battery shell, the space utilization rate of the battery pack is improved, and the service performance of the battery pack is 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 illustrating a structure of a battery pack according to an exemplary embodiment;

fig. 2 is a schematic structural view illustrating one view of a battery pack according to an exemplary embodiment;

fig. 3 is a schematic structural view illustrating another view of a battery pack according to an exemplary embodiment;

fig. 4 is an exploded structural view illustrating a battery cell of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

1. a battery; 10. a battery case; 11. a first recess; 12. a second recess; 13. a first surface; 14. a second surface; 15. a third surface; 20. a first pole assembly; 30. a second post assembly; 40. a first cell; 50. and a second cell.

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 pack, referring to fig. 1 to 4, including a plurality of electrically connected cells 1, the plurality of cells 1 being stacked in a first direction, the cells 1 including: a battery case 10 provided with a first recess 11 and a second recess 12 along opposite sides of the battery case 10 in a second direction; a first pole assembly 20, wherein the first pole assembly 20 is disposed on the battery case 10 and at least partially located in the first recess 11 so as to be located outside the battery case 10; a second post assembly 30, wherein the second post assembly 30 is disposed on the battery case 10 and at least partially located in the second recess 12 so as to be located outside the battery case 10; wherein the first direction is perpendicular to the second direction.

The battery pack according to one embodiment of the present utility model includes a plurality of cells 1 electrically connected, the plurality of cells 1 are stacked in a first direction, the cell 1 includes a cell case 10, a first post assembly 20, and a second post assembly 30, and in a second direction, the space utilization of the cell pack is increased by providing first and second recesses 11 and 12 at opposite sides of the cell case 10 such that at least a portion of the first post assembly 20 is positioned in the first recess 11 and at least a portion of the second post assembly 30 is positioned in the second recess 12, and the first direction is perpendicular to the second direction, whereby the space utilization of the cell case 10 by the first and second post assemblies 20 and 30 can be improved, and the space utilization of the cell pack is increased by preventing the first and second post assemblies 20 and 30 from excessively protruding the surface of the cell case 10, thereby improving the use performance of the cell pack.

It should be noted that the battery pack includes a plurality of batteries 1, and the plurality of batteries 1 may be connected in series, or the plurality of batteries 1 may be connected in parallel, or a part of the batteries 1 in the battery pack may be connected in series, another part of the batteries 1 may be connected in parallel, or the like, which is not limited herein.

The plurality of cells 1 may be stacked in the first direction, that is, the plurality of cells 1 may be sequentially arranged in the first direction, a buffer structure may be provided between the cells 1, etc., and is not limited herein, with an emphasis on illustrating that the plurality of cells 1 are arranged in the first direction, that is, the cell cases 10 of the respective cells 1 are stacked in the first direction. The battery case 10 is provided with the first recess 11 and the second recess 12, and the first recess 11 and the second recess 12 are disposed on the battery case 10 along the second direction, i.e., the first recess 11 and the second recess 12 are not disposed on the stacking surface of the battery case 10, so that the first pole assembly 20 and the second pole assembly 30 disposed in the first recess 11 and the second recess 12 can be prevented from occupying the stacking space of the battery pack, thereby improving the space utilization of the battery pack, and further improving the volumetric energy density of the battery.

For example, the battery case 10 is a rectangular body, two opposite surfaces of the rectangular body are stacking surfaces, and a first recess 11 and a second recess 12 are respectively provided on the other opposite surfaces of the rectangular body, after the batteries 1 are stacked, the first recess 11 and the second recess 12 are exposed at the circumferential outer surfaces of the plurality of batteries 1, that is, the first post assembly 20 and the second post assembly 30 in the first recess 11 and the second recess 12 are exposed at the circumferential outer surfaces of the plurality of batteries 1, so that the batteries 1 can be conveniently electrically connected, that is, the connection of the bus bars with the posts of the batteries 1 is convenient, and the stacking space of the batteries can be avoided from being occupied by the posts, thereby improving the space utilization rate when the batteries are grouped.

Referring to fig. 1, a first direction is denoted as a, and it is shown in fig. 1 that two cells 1 may be stacked along the first direction a; as shown in connection with fig. 4, the second direction is denoted B and the third direction is denoted C.

In one embodiment, the first pole assembly 20 may protrude from the first recess 11, and the second pole assembly 30 may protrude from the second recess 12, so that connection may be easily performed when the bus bar is connected to the poles, and thus, connection may be conveniently performed when, for example, the bus bar is welded to the first pole assembly 20.

In one embodiment, the first pole assembly 20 does not protrude from the first recess 11, and the second pole assembly 30 does not protrude from the second recess 12, so that the first pole assembly 20 and the second pole assembly 30 can be prevented from increasing the space size of the battery pack, thereby maximizing the space utilization of the battery pack, for example, when the first pole assembly 20 is lower than the first recess 11, it is not excluded that the bus bar can be at least partially located in the first recess 11, and when the second pole assembly 30 is lower than the second recess 12, it is not excluded that the bus bar can be at least partially located in the second recess 12.

In one embodiment, as shown in fig. 2 and 3, the first recess 11 penetrates through the opposite outer surfaces of the battery case 10, and the second recess 12 penetrates through the opposite outer surfaces of the battery case 10, so that the areas of the first recess 11 and the second recess 12 can be properly increased, and the formation of the first recess 11 and the second recess 12 can be facilitated, thereby improving the manufacturing efficiency of the battery, and the installation of the first and second pole assemblies 20 and 30 can be facilitated, thereby improving the grouping efficiency of the battery pack.

The first recess 11 penetrates through the opposite outer surfaces of the battery case 10, and the second recess 12 penetrates through the opposite outer surfaces of the battery case 10, i.e., it can be said that the first recess 11 has three openings, the two openings are oppositely disposed, the second recess 12 has three openings, and the two openings are oppositely disposed, for example, when the first recess 11 is a rectangular body, the first recess 11 has two opposite side walls, and when the second recess is a rectangular body, the second recess 12 has two opposite side walls.

In one embodiment, in the second direction, the orthographic projections of the first recess 11 and the second recess 12 on the same plane coincide, so that the space utilization rate of the battery case can be improved, and the forming of the first recess 11 and the second recess 12 can be facilitated, in some cases, the mounting and the replacement of the first pole assembly 20 and the second pole assembly 30 can be realized without excluding the fact that the first recess 11 and the second recess 12 can be replaced at the position of the battery core, so that the adaptability of the battery case 10 is higher, the assembly efficiency of the battery is improved, and the difficulty of battery assembly can be reduced.

It should be noted that in some embodiments, it is not excluded that in the second direction, the orthographic projection portions of the first recess 11 and the second recess 12 on the same plane do not coincide.

In one embodiment, the first recess 11 is provided at the middle of the battery case 10 and the second recess 12 is provided at the middle of the battery case 10 in the third direction; the first direction is perpendicular to the third direction, and the second direction is perpendicular to the third direction, so that the first recess 11 and the second recess 12 can have relatively reliable supporting surfaces, the problem that the local structure of the battery case 10 is too weak is avoided, and the mounting position of the battery cell can be adapted, so that the tab and the pole column assembly of the battery cell are convenient to connect.

In one embodiment, as shown in fig. 4, the battery 1 further includes a first electric core 40 and a second electric core 50, where the first electric core 40 and the second electric core 50 are disposed along a third direction, and the first electric core 40 and the second electric core 50 are electrically connected, so that the first electric core 40 and the second electric core 50 can share the first pole component 20 and the second pole component 30, and on the basis of improving the battery capacity, the arrangement of components can be reduced, thereby improving the energy density of the battery.

The first and second battery cells 40, 50 may be connected in series, for example, a first positive tab of the first battery cell 40 may be connected with a first negative tab of the second battery cell 50, and a second negative tab of the first battery cell 40 may be electrically connected with the first post assembly 20, and a second positive tab of the second battery cell 50 may be electrically connected with the second post assembly 30.

Alternatively, the first and second battery cells 40 and 50 may be connected in parallel, for example, a first positive tab of the first battery cell 40 and a second positive tab of the second battery cell 50 may be electrically connected with the first post assembly 20, and a first negative tab of the first battery cell 40 and a second negative tab of the second battery cell 50 may be electrically connected with the second post assembly 30.

The battery may further include a third cell and a fourth cell, and the first cell 40, the second cell 50, the third cell, and the fourth cell may share the first pole assembly 20 and the second pole assembly 30.

In one embodiment, the first recess 11 is disposed at the center of the battery case 10 and the second recess 12 is disposed at the center of the battery case 10 in the third direction, so that the first and second pole assemblies 20 and 30 can be conveniently electrically connected with the first and second battery cells 40 and 50, thereby improving the assembly efficiency of the battery, and the stress on the battery case 10 can be substantially uniform, thereby improving the safety performance of the battery.

It should be noted that in some embodiments, it is not excluded that the first recess 11 and the second recess 12 are located at the end of the battery case 10.

In one embodiment, as shown in fig. 2, the battery case 10 includes two opposing first surfaces 13, two second surfaces 14, and two third surfaces 15; the first direction is perpendicular to the first surface 13, the second direction is perpendicular to the second surface 14, and the first recess 11 and the second recess 12 are respectively arranged on the two second surfaces 14, so that when the batteries are grouped, two bus bars can be respectively positioned on two opposite sides of the batteries.

In one embodiment, the area of the first surface 13 is larger than the area of the second surface 14, the area of the second surface 14 is larger than the area of the third surface 15, and the adjacent cells 1 are stacked through the first surface 13, thereby improving the stacking ability of the cells, and the first and second recesses 11 and 12 are respectively provided on the two second surfaces 14, so that the cell case 10 having a relatively large area can provide reliable supporting force for the first and second pole assemblies 20 and 30.

It should be noted that the first direction is perpendicular to the first surface 13, that is, two adjacent cells 1 may be stacked through the first surface 13. While the second direction is perpendicular to the second surface 14, the first recess 11 and the second recess 12 may be disposed on a third surface 15, and it may be understood that the first recess 11 and the second recess 12 are disposed on opposite sides of the battery case 10 along the second direction; alternatively, the second direction may be perpendicular to the second surface 14, in which case the first recess 11 and the second recess 12 may be provided on opposite second surfaces 14.

In one embodiment, the height of the first pole assembly 20 outside the battery case 10 is less than the depth of the first recess 11, and the height of the second pole assembly 30 outside the battery case 10 is less than the depth of the second recess 12; wherein, the group battery still includes the busbar, and at least two batteries are connected to the busbar electricity, and part of busbar is located first sunken 11 or second sunken 12 to can realize accomodating the busbar, reduce the space dimension of the group battery that the busbar increases, with this space utilization of improving the group battery, thereby improve the volumetric energy density of battery.

The bus bars may realize electrical connection of two adjacent batteries 1, for example, two bus bars may be respectively located at two opposite sides of the battery 1, that is, two bus bars may respectively correspond to the first recess 11 and the second recess 12, so as to realize parallel connection of a plurality of batteries, or the bus bars may be plural, and two opposite sides of the battery 1 may be conveniently provided with a plurality of bus bars, so as to realize parallel connection of a plurality of batteries.

Alternatively, the plurality of cells 1 may be connected in series, for example, the first recess 11 and the second recess 12 of the adjacent cells 1 may be alternately arranged at the same side of the cells 1, so that the plurality of cells 1 are connected in series by the bus bar, and the specific structure of the bus bar is not limited.

In one embodiment, the height of the first post assembly 20 and the bus bar outside the battery case 10 and the depth of the first recess 11 are not greater, or the height of the second post assembly 30 and the bus bar outside the battery case 10 and the depth of the second recess 12 are not greater, so that the bus bar does not protrude from the first recess 11 or the second recess 12, thereby improving the space utilization of the battery pack and further improving the energy density of the battery pack.

It should be noted that, the bus bar may be connected to the top end of the first pole assembly 20 or the second pole assembly 30, where the height of the first pole assembly 20 and the bus bar is not greater than the depth of the first recess 11, and the height of the second pole assembly 30 and the bus bar is not greater than the depth of the second recess 12. Alternatively, the bus bar may be connected to the middle of the first or second post assemblies 20 or 30, i.e., a portion of the bus bar may be located at a middle position of the first or second post assemblies 20 or 30, the sum of the heights of the first and second post assemblies 20 and 30 after the portions overlapping the first post assembly 20 are removed, and the sum of the heights of the second and second post assemblies 30 and 30 after the portions overlapping the second post assembly 30 are removed.

In one embodiment, the battery pack further includes a battery case in which the plurality of batteries 1 are disposed, and the second direction is perpendicular to the bottom surface of the battery case, so that the plurality of batteries 1 can be stably disposed in the battery case and can effectively receive the bus bar for connecting the post assembly.

It should be noted that the battery pack may be a battery module, or the battery pack may be a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, 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.

The battery pack comprises a plurality of batteries and a battery box body, wherein the battery box body is used for fixing the plurality of batteries.

It should be noted that the battery pack includes a plurality of batteries, and the plurality of batteries are disposed in the battery case. The batteries can form a battery module and then are arranged in the battery box body. Or, a plurality of batteries can be directly arranged in the battery box body, namely, the batteries do not need to be grouped, and the batteries are fixed by the battery box body.

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 portion, wherein the stacked portion comprises a first pole piece, a separator 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.

In one embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, where the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and corners between sides are not necessarily right angles, and may be arc transitions.

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 thickness of the battery case 10 is 0.1mm to 0.5mm, so that the weight of the battery case 10 can be reduced, thereby improving the energy density of the battery.

In one embodiment, the battery case 10 may be an aluminum case, or the battery case 10 may be a steel case, or the battery case 10 may be a copper case, or the battery case 10 may be a composite metal case.

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 pack comprising a plurality of electrically connected cells (1), a plurality of said cells (1) being arranged in a stack along a first direction, said cells (1) comprising:

a battery case (10), in a second direction, the battery case (10) being provided with a first recess (11) and a second recess (12) on opposite sides thereof;

-a first pole assembly (20), said first pole assembly (20) being arranged on said battery housing (10) and being at least partially located within said first recess (11) so as to be located outside said battery housing (10);

-a second post assembly (30), said second post assembly (30) being arranged on said battery housing (10) and being at least partially located within said second recess (12) so as to be located outside said battery housing (10);

wherein the first direction is perpendicular to the second direction.

2. The battery according to claim 1, wherein the first pole assembly (20) does not protrude from the first recess (11) and the second pole assembly (30) does not protrude from the second recess (12).

3. The battery pack according to claim 1, wherein the first recess (11) is provided through opposite outer surfaces of the battery case (10), and the second recess (12) is provided through opposite outer surfaces of the battery case (10).

4. The battery according to claim 1, characterized in that in the second direction, the orthographic projections of the first recess (11) and the second recess (12) on the same plane coincide.

5. The battery pack according to claim 1, wherein the first recess (11) is provided in a middle of the battery case (10) and the second recess (12) is provided in a middle of the battery case (10) in the third direction;

wherein the first direction is perpendicular to the third direction and the second direction is perpendicular to the third direction.

6. The battery pack according to claim 5, wherein the battery (1) further comprises a first cell (40) and a second cell (50), the first cell (40) and the second cell (50) being arranged along the third direction, the first cell (40) and the second cell (50) being electrically connected.

7. The battery pack according to claim 6, wherein the first recess (11) is provided at a center position of the battery case (10) and the second recess (12) is provided at a center position of the battery case (10) in the third direction.

8. The battery according to claim 1, wherein the battery housing (10) comprises two opposing first surfaces (13), two second surfaces (14) and two third surfaces (15);

the first direction is perpendicular to the first surface (13), the second direction is perpendicular to the second surface (14), and the first recess (11) and the second recess (12) are respectively arranged on the two second surfaces (14).

9. The battery according to claim 8, wherein the area of the first surface (13) is larger than the area of the second surface (14), the area of the second surface (14) being larger than the area of the third surface (15).

10. The battery pack according to claim 1, wherein the first pole assembly (20) is located outside the battery case (10) at a height smaller than the depth of the first recess (11), and the second pole assembly (30) is located outside the battery case (10) at a height smaller than the depth of the second recess (12);

wherein the battery pack further comprises a busbar electrically connected to at least two of the cells, a portion of the busbar being located in the first recess (11) or the second recess (12).

11. The battery pack according to claim 10, wherein the height of the first post assembly (20) and the bus bar outside the battery case (10) and the depth of the first recess (11) are not greater, or the height of the second post assembly (30) and the bus bar outside the battery case (10) and the depth of the second recess (12) are not greater.

12. The battery pack according to claim 1, further comprising a battery case in which the plurality of batteries (1) are disposed, the second direction being perpendicular to a bottom surface of the battery case.

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