CN219476934U - Battery and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery pack. The battery comprises a battery shell, a first electric core, a second electric core, a first pole and a second pole, wherein the first pole and the second pole are arranged on the same first surface, the first pole is electrically connected with the first electric core and the second electric core, and the second pole is electrically connected with the first electric core and the second electric core. Through making the second electrically conductive connection face extend by setting up a first surface orientation of first utmost point post and keeping away from the direction of another first surface, the fourth electrically conductive connection face extends by setting up a first surface orientation of first utmost point post and be close to the direction of another first surface to when the battery is in groups, adjacent battery can conveniently realize the electricity and connect, improves the group ability of battery, has improved the group efficiency of battery.

Description

Battery and battery pack

Technical Field

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

Background

In the related art, the battery includes a battery case and a battery cell disposed in the battery case, the battery cell forms charge and discharge through a post assembly, and when the battery is assembled, a plurality of batteries may be electrically connected through a bus bar, however, due to structural limitations of the battery, a problem of low space utilization rate in the battery assembly may occur.

Disclosure of Invention

The utility model provides a battery and a battery pack, which are used for improving the performance of the battery.

According to an aspect of the present utility model, there is provided a battery including:

the battery shell comprises two opposite first surfaces and four second surfaces arranged around the first surfaces, and the area of the first surfaces is larger than that of the second surfaces;

the first battery cell is arranged in the battery shell;

the first battery cell and the second battery cell are arranged along the length direction of the battery shell;

the first pole is arranged on the first surface and comprises a first conductive connecting surface and a second conductive connecting surface, the first conductive connecting surface and the second conductive connecting surface are respectively positioned on the inner side and the outer side of the battery shell, the first conductive connecting surface is electrically connected with the first electric core and the second electric core at the same time, a first included angle is formed between the second conductive connecting surface and the first surface, and the second conductive connecting surface extends from one first surface provided with the first pole to a direction far away from the other first surface;

the second pole is arranged on the first surface and comprises a third conductive connecting surface and a fourth conductive connecting surface, the third conductive connecting surface and the fourth conductive connecting surface are respectively positioned on the inner side and the outer side of the battery shell, the third conductive connecting surface is electrically connected with the first electric core and the second electric core at the same time, a second included angle is formed between the fourth conductive connecting surface and the first surface, and the fourth conductive connecting surface extends from one first surface provided with the first pole towards the direction close to the other first surface;

the front projection of the first pole and the second pole on the first surface is positioned between the front projection of at least part of the first battery cell and the front projection of at least part of the second battery cell on the first surface along the thickness direction of the battery shell.

The battery provided by the embodiment of the utility model comprises a battery shell, a first electric core, a second electric core, a first pole column and a second pole column, wherein the first electric core and the second electric core are arranged in the battery shell along the length direction of the battery shell, the first pole column and the second pole column are arranged on the same first surface and are positioned in the middle of the first surface, so that the electric connection between the first pole column and the first electric core and the electric connection between the second pole column and the second electric core can be conveniently realized, namely, the first pole column and the second pole column serve as two electrode output ends of the battery. Through making the second conductive connection face of first utmost point post and the fourth conductive connection face of second utmost point post extend along different directions, the second conductive connection face by setting up one first surface orientation of first utmost point post and keeping away from the direction of another first surface extension promptly, the fourth conductive connection face by setting up one first surface orientation of first utmost point post and be close to the direction of another first surface extension to when the battery is in groups, adjacent battery can conveniently realize the electricity and connect, improves the group ability of battery, has improved the group efficiency of battery.

According to another aspect of the present utility model, there is provided a battery pack including the above-described battery.

The battery of the battery pack comprises a battery shell, a first electric core, a second electric core, a first pole column and a second pole column, wherein the first electric core and the second electric core are arranged in the battery shell along the length direction of the battery shell, the first pole column and the second pole column are arranged on the same first surface and are positioned in the middle of the first surface, so that the electric connection between the first pole column and the first electric core and the electric connection between the second pole column and the second electric core can be conveniently realized, and the first pole column and the second pole column serve as two electrode output ends of the battery. Through making the second conductive connection face of first utmost point post and the fourth conductive connection face of second utmost point post extend along different directions, the second conductive connection face by setting up one first surface orientation of first utmost point post and keeping away from the direction of another first surface extension promptly, the fourth conductive connection face by setting up one first surface orientation of first utmost point post and be close to the direction of another first surface extension to when the battery is in groups, adjacent battery can conveniently realize the electricity and connect, improves the group ability of battery, has improved the group efficiency 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 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 of a first view of a battery according to an exemplary embodiment;

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

fig. 3 is a schematic view illustrating a structure of a third view of a battery according to an exemplary embodiment;

fig. 4 is a partial structure diagram of a battery according to an exemplary embodiment;

fig. 5 is a schematic structural view of a first cell and a second cell of a battery according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a battery case; 11. a first surface; 12. a second surface; 13. a recess; 131. a first portion; 132. a second portion; 133. a third section; 20. a first cell; 21. a first tab; 22. a second lug; 23. a first cell body; 30. a second cell; 31. a third ear; 32. a fourth ear; 33. a second cell body; 40. a first pole; 41. a first conductive connection surface; 42. a second conductive connection surface; 50. a second post; 51. a third conductive connection surface; 52. and a fourth conductive connection surface.

Detailed Description

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

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

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

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

An embodiment of the present utility model provides a battery, referring to fig. 1 to 5, the battery includes: a battery case 10, the battery case 10 including two opposite first surfaces 11 and four second surfaces 12 disposed around the first surfaces 11, the first surfaces 11 having an area larger than that of the second surfaces 12; the first battery cell 20, the first battery cell 20 is set up in the battery shell 10; the second battery cell 30, the second battery cell 30 is disposed in the battery case 10, and the first battery cell 20 and the second battery cell 30 are disposed along the length direction of the battery case 10; the first pole 40, the first pole 40 is disposed on the first surface 11, the first pole 40 includes a first conductive connection surface 41 and a second conductive connection surface 42, the first conductive connection surface 41 and the second conductive connection surface 42 are respectively located at the inner side and the outer side of the battery case 10, the first conductive connection surface 41 is electrically connected with the first electric core 20 and the second electric core 30 at the same time, a first included angle is formed between the second conductive connection surface 42 and the first surface 11, and the second conductive connection surface 42 extends from one first surface 11 on which the first pole 40 is disposed toward a direction away from the other first surface 11; the second pole 50, the second pole 50 is disposed on the first surface 11, the second pole 50 includes a third conductive connection surface 51 and a fourth conductive connection surface 52, the third conductive connection surface 51 and the fourth conductive connection surface 52 are respectively located at the inner side and the outer side of the battery case 10, the third conductive connection surface 51 is electrically connected with the first electric core 20 and the second electric core 30 at the same time, a second included angle is formed between the fourth conductive connection surface 52 and the first surface 11, and the fourth conductive connection surface 52 extends from one first surface 11 on which the first pole 40 is disposed toward a direction approaching the other first surface 11; the orthographic projection portions of the first electrode post 40 and the second electrode post 50 on the same plane along the width direction of the battery case 10 are overlapped, and the orthographic projection of the first electrode post 40 and the second electrode post 50 on the first surface 11 along the thickness direction of the battery case 10 is located between the orthographic projection of at least part of the first battery cell 20 and at least part of the second battery cell 30 on the first surface 11.

The battery according to one embodiment of the present utility model includes a battery case 10, a first electric core 20, a second electric core 30, a first electrode post 40 and a second electrode post 50, where the first electric core 20 and the second electric core 30 are disposed in the battery case 10 along the length direction of the battery case 10, and the first electrode post 40 and the second electrode post 50 are disposed on the same first surface 11 and are located in the middle of the first surface 11, so that electrical connection between the first electrode post 40 and the first electric core 20 and the second electric core 30 can be conveniently achieved, and electrical connection between the second electrode post 50 and the first electric core 20 and the second electric core 30, that is, the first electrode post 40 and the second electrode post 50 serve as two electrode output ends of the battery. By extending the second conductive connection face 42 of the first pole 40 and the fourth conductive connection face 52 of the second pole 50 in different directions, i.e., the second conductive connection face 42 extends from one first surface 11 of the first pole 40 toward a direction away from the other first surface 11, and the fourth conductive connection face 52 extends from one first surface 11 of the first pole 40 toward a direction close to the other first surface 11, when the batteries are grouped, electrical connection between adjacent batteries can be conveniently achieved, the battery grouping ability is improved, and the battery grouping efficiency is improved.

It should be noted that, as shown in fig. 1 to 3, the battery case 10 includes two opposite first surfaces 11 and four second surfaces 12 disposed around the first surfaces 11, the first surfaces 11 have an area larger than that of the second surfaces 12, that is, the two opposite first surfaces 11 are large surfaces of the battery case 10, and the four second surfaces 12 are small surfaces of the battery case 10, and the four second surfaces 12 include two pairs of small surfaces, that is, a first pair of small surfaces extending in the length direction of the battery case 10, and a second pair of small surfaces extending in the width direction of the battery case 10, and the first pair of small surfaces have an area larger than that of the second pair of small surfaces, but are each smaller than that of the large surfaces. The battery may be a quadrangular type battery, which mainly refers to a prismatic shape, but does not strictly define whether each side of the prism is necessarily a strictly defined straight line, and the corners between sides are not necessarily right angles, and may be arc transitions.

As shown in fig. 1, 2 and 4, the first pole 40 is disposed on the first surface 11, that is, the large surface of the battery case 10 can provide sufficient supporting capability for the first pole 40, so as to improve the stability of the first pole 40. The first terminal 40 includes a first conductive connection surface 41 and a second conductive connection surface 42, the first conductive connection surface 41 and the second conductive connection surface 42 being located at the inner side and the outer side of the battery case 10, respectively, whereby the first conductive connection surface 41 can be electrically connected with the first battery cell 20 and the second battery cell 30 at the same time, and the second conductive connection surface 42 is used for electrically connecting with another battery.

The second conductive connection surface 42 has a first included angle with the first surface 11, so that the area of the second conductive connection surface 42 can be increased, and the second conductive connection surface 42 can be connected with the busbar when the subsequent batteries are grouped.

As shown in fig. 1, 2 and 4, the second post 50 is disposed on the first surface 11, that is, the large surface of the battery case 10 can provide sufficient supporting capability to the second post 50, so as to improve the stability of the second post 50. The second post 50 includes a third conductive connection surface 51 and a fourth conductive connection surface 52, the third conductive connection surface 51 and the fourth conductive connection surface 52 being located at the inner side and the outer side of the battery case 10, respectively, whereby the third conductive connection surface 51 can be electrically connected to the first battery cell 20 and the second battery cell 30 at the same time, and the fourth conductive connection surface 52 is used for electrically connecting to another battery.

The fourth conductive connection surface 52 and the first surface 11 have a second included angle therebetween, so that the area of the fourth conductive connection surface 52 can be increased, and the fourth conductive connection surface 52 can be connected with the bus bar when the subsequent batteries are grouped.

The second conductive connection face 42 extends from one first surface 11 on which the first pole 40 is disposed toward a direction away from the other first surface 11, the fourth conductive connection face 52 extends from one first surface 11 on which the first pole 40 is disposed toward a direction toward the other first surface 11, for example, the second conductive connection face 42 may extend upward with respect to the one first surface 11 on which the first pole 40 is disposed, and the fourth conductive connection face 52 may extend downward as shown in fig. 1. When a plurality of batteries are grouped, the second conductive connecting surface 42 of one battery may extend upward, and the fourth conductive connecting surface 52 of the other battery may extend downward, so that the distance between the second conductive connecting surface 42 and the fourth conductive connecting surface 52 may be reduced, and the electrical connection between the adjacent two batteries is achieved, at this time, the second conductive connecting surface 42 and the fourth conductive connecting surface 52 may be connected by a bus bar, and of course, direct electrical connection between the first post 40 and the second post 50 of the adjacent two batteries is not excluded in some cases.

The orthographic projection portions of the first electrode post 40 and the second electrode post 50 on the same plane along the width direction of the battery case 10 coincide, and the orthographic projections of the first electrode post 40 and the second electrode post 50 on the first surface 11 are located between the orthographic projections of at least part of the first battery core 20 and at least part of the second battery core 30 on the first surface 11 along the thickness direction of the battery case 10, that is, the first electrode post 40 and the second electrode post 50 can be located in the middle of the battery case 10 and simultaneously approach the first battery core 20 and the second battery core 30, thereby conveniently realizing the connection of the first electrode post 40 and the second electrode post 50 with the first battery core 20 and the second battery core 30, shortening the transmission rate inside the first battery core 20 and the second battery core 30, not excluding the equal transmission rate of the first battery core 20 and the second battery core 30, realizing the equalization of the current density, simultaneously reducing the whole internal resistance of the battery, thereby reliably improving the service performance of the battery.

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 stack portion including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode are interchangeable. The cells may be laminated cells or, alternatively, the cells may be wound cells.

The first electric core 20 and the second electric core 30 are arranged along the length direction of the battery shell 10, namely, the first electric core 20 and the second electric core 30 can form a left-right arrangement structure, so that the overall length of the electric core in the battery shell 10 is increased, in the forming process of the independent first electric core 20 and the second electric core 30, the electric core with larger forming length can be avoided, the forming efficiency can be improved, and the accuracy after forming can be improved.

As shown in fig. 1, the longitudinal direction of the battery case 10 is denoted by X, the width direction of the battery case 10 is denoted by Y, and the thickness direction of the battery case 10 is denoted by Z.

In one embodiment, as shown in connection with fig. 4 and 5, the first cell 20 includes a first cell body 23 and first and second tabs 21 and 22 extending from the first cell body 23, and the second cell 30 includes a second cell body 33 and third and fourth tabs 31 and 32 extending from the second cell body 33; the front projections of the first pole 40 and the second pole 50 on the first surface 11 are located between the front projections of the first cell main body 23 and the second cell main body 33 on the first surface 11, so that the electrical connection between the first pole 40 and the second pole 50 and the first cell 20 and the second cell 30 can be conveniently realized.

The first tab 21 and the third tab 31 may overlap, the second tab 22 and the fourth tab 32 may overlap, and for convenience, the first post 40 is connected to the first tab 21 and the third tab 31, and the second post 50 is connected to the second tab 22 and the fourth tab 32, so that the first post 40 is directly opposite to the first tab 21 and the third tab 31, and the second post 50 is directly opposite to the second tab 22 and the fourth tab 32.

In some embodiments, the first tab 21 and the third tab 31 may be disposed at a distance, the second tab 22 and the fourth tab 32 may be disposed at a distance, the first post 40 is connected to the first tab 21 and the third tab 31, the second post 50 is connected to the second tab 22 and the fourth tab 32, for example, the first post 40 is directly connected to the first tab 21 and the third tab 31, the second post 50 is directly connected to the second tab 22 and the fourth tab 32, and at this time, the first post 40 and the first tab 21 and the third tab 31 may be disposed directly opposite to each other, and the second post 50 is directly opposite to the second tab 22 and the fourth tab 32; alternatively, the first pole 40 is connected to the first pole ear 21 and the third pole ear 31 through the switching piece, the second pole 50 is connected to the second pole ear 22 and the fourth pole ear 32 through the switching piece, at this time, the first pole 40 may not be directly opposite to the first pole ear 21 and the third pole ear 31, the second pole 50 may not be directly opposite to the second pole ear 22 and the fourth pole ear 32, and the orthographic projections of the first pole 40 and the second pole 50 on the first surface 11 are located between the orthographic projections of the first battery cell 20 and the second battery cell 30 on the first surface 11.

In one embodiment, as shown in fig. 1 and 2, the first electrode post 40 and the second electrode post 50 are located in a central position area of the first surface 11 along the length direction of the battery case 10, that is, in the case that the lengths of the first battery cell 20 and the second battery cell 30 are substantially consistent, the first electrode post 40 and the second electrode post 50 may be located in a central position area of the first surface 11, so that connection with the first battery cell 20 and the second battery cell 30 may be conveniently achieved, the mounting capability of the battery is improved, and the transmission rate inside the first battery cell 20 and the second battery cell 30 may be effectively ensured to be shortened, the transmission rate of the first battery cell 20 and the second battery cell 30 may be effectively ensured to be equal, the current density may be balanced, and the overall internal resistance of the battery may be reduced, thereby reliably improving the service performance of the battery.

The center position area of the first surface 11 along the length direction of the battery case 10 may be regarded as the very center area of the first surface 11, and further may be regarded as the center line passing through the first and second poles 40 and 50.

In one embodiment, the first included angle is a right angle, the second included angle is a right angle, that is, the second conductive connection surface 42 is perpendicular to the first surface 11, and the fourth conductive connection surface 52 is perpendicular to the first surface 11, so that not only can the formation of the first pole 40 and the second pole 50 be facilitated, but also the connection of the busbar with the first pole 40 and the second pole 50 during the subsequent battery grouping can be facilitated, and the assembly efficiency during the battery grouping can be improved.

In one embodiment, the first conductive connection surface 41 is parallel to the first surface 11, and the third conductive connection surface 51 is parallel to the first surface 11, whereby electrical connection of the first conductive connection surface 41 to the first and second cells 20 and 30 can be conveniently achieved, and electrical connection of the third conductive connection surface 51 to the first and second cells 20 and 30.

For example, as shown in fig. 4 and fig. 5, the opposite end of the first battery cell 20 to the second battery cell 30 is led out with the first tab 21 and the second tab 22 with opposite polarities, the opposite end of the second battery cell 30 to the first battery cell 20 is led out with the third tab 31 and the fourth tab 32 with opposite polarities, at this time, the first conductive connection surface 41 may connect the first tab 21 and the third tab 31 at the same time, and the third conductive connection surface 51 may connect the second tab 22 and the fourth tab 32 at the same time, thereby making the first electrode post 40 and the second electrode post 50 respectively serve as two electrode output terminals of the battery. The first and second battery cells 20 and 30 may be connected in series, or the first and second battery cells 20 and 30 may be connected in parallel. The manner in which the first conductive connection surface 41 connects the first tab 21 and the third tab 31, and the manner in which the third conductive connection surface 51 connects the second tab 22 and the fourth tab 32 are not limited, and may be, for example, directly electrically connected or may be electrically connected through a patch.

In one embodiment, as shown in fig. 5, the first tab 21 is disposed opposite to the third tab 31, the second tab 22 is disposed opposite to the fourth tab 32, the first post 40 is electrically connected to the first tab 21 and the third tab 31, and the second post 50 is electrically connected to the second tab 22 and the fourth tab 32, so that the electrical connection between the first battery cell 20 and the second battery cell 30 can be conveniently achieved, and the first post 40 and the second post 50 can be ensured to be respectively used as two electrode output ends of the battery.

The first tab 21 and the second tab 22 may be a positive tab and a negative tab, and the third tab 31 and the fourth tab 32 may be a positive tab and a negative tab, respectively, and the first post 40 is electrically connected to the first tab 21 and the third tab 31, and the second post 50 is electrically connected to the second tab 22 and the fourth tab 32, so that the first battery cell 20 and the second battery cell 30 may be connected in parallel.

The first tab 21 and the second tab 22 may be a positive tab and a negative tab, respectively, the third tab 31 and the fourth tab 32 may be a positive tab and a negative tab, respectively, the first tab 21 may be connected with the fourth tab 32, the first post 40 is connected with the second tab 22, and the second post 50 is connected with the third tab 31, thereby connecting the first battery cell 20 and the second battery cell 30 in series.

The first tab 21 is disposed opposite to the third tab 31, and the first tab 21 and the third tab 31 may be abutted, or the first tab 21 and the third tab 31 may be stacked; the second tab 22 is disposed opposite the fourth tab 32, and the second tab 22 and the fourth tab 32 may be abutted, or the second tab 22 and the fourth tab 32 may be stacked.

It should be noted that it is not excluded that the battery may include more than two cells, which is not limited herein.

In one embodiment, the length of the battery case 10 is equal to or greater than 400mm, i.e., the length of the battery is larger, so that the capacity requirement of the battery can be met, and the subsequent battery grouping efficiency can be facilitated, thereby improving the battery grouping capability.

The length of the battery case 10 may be 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, etc.

In one embodiment, the length of the first electric core 20 is equal to the length of the second electric core 30, so that the electric core can be conveniently formed, the manufacturing efficiency of the battery is improved, the transmission rate inside the first electric core 20 and the second electric core 30 is shortened, the transmission rate of the first electric core 20 and the transmission rate of the second electric core 30 are equal, the current density are balanced, and meanwhile, the overall internal resistance of the battery is reduced, so that the service performance of the battery is reliably improved.

In one embodiment, the ratio of the length of the first battery cell 20 to the length of the battery case 10 is 30% -49%, and the ratio of the length of the second battery cell 30 to the length of the battery case 10 is 30% -49%, so that the first and second poles 40 and 50 can have reliable overcurrent capability on the basis of ensuring the battery energy density, thereby improving the safe use performance of the battery.

The ratio of the length of the first battery cell 20 to the length of the battery case 10 is 30% -49%, and the ratio of the length of the second battery cell 30 to the length of the battery case 10 is 30% -49%, that is, the battery case 10 may have a space for installing the first and second poles 40 and 50, so that the first and second poles 40 and 50 can have a certain size, thereby ensuring that the first and second poles 40 and 50 can have a reliable overcurrent capability.

The ratio of the length of the first cell 20 to the length of the battery case 10 may be 30%, 31%, 32%, 35%, 38%, 39%, 40%, 41%, 42%, 45%, 48%, 49%, or the like.

The ratio of the length of the second cell 30 to the length of the battery case 10 may be 30%, 31%, 32%, 35%, 38%, 39%, 40%, 41%, 42%, 45%, 48%, 49%, or the like.

In one embodiment, the ratio of the distance between the first and second poles 40 and 50 to the width of the battery case 10 is 10% -40%, so that not only the insulation performance between the first and second poles 40 and 50, that is, the reliable creepage distance between the first and second poles 40 and 50, but also the reliable structural size of the first and second poles 40 and 50 to ensure the overcurrent capability can be ensured, and further the current transmission rate of the first and second poles 40 and 50 can be improved, thereby reliably improving the service performance of the battery.

The ratio of the distance between the first and second poles 40, 50 to the width of the battery case 10 may be 10%, 11%, 12%, 15%, 18%, 19%, 20%, 21%, 22%, 25%, 28%, 29%, 30%, 31%, 32%, 35%, 38%, 39% or 40%, etc.

In one embodiment, as shown in fig. 3, the battery case 10 is provided with a recess 13, and the recess 13 may be used to receive the first and second poles 40 and 50 of another battery, thereby improving the grouping ability of the batteries when they are grouped and improving the space utilization of the battery pack.

In one embodiment, the battery case 10 is provided with the recess 13, at least part of the first pole 40 is located in the recess 13, and at least part of the second pole 50 is located in the recess 13, so that interference between adjacent batteries can be avoided when the batteries are grouped, and the space utilization of the battery pack is improved.

In one embodiment, as shown in fig. 3, the recess 13 includes a first portion 131, a second portion 132, and a third portion 133, the first portion 131 communicating with the second portion 132 and the third portion 133, the first portion 131 being located on the first surface 11, the second portion 132 and the third portion 133 being located on the opposite second surfaces 12, respectively; wherein at least part of the first pole 40 is located in the first portion 131, part of the second pole 50 is located in the first portion 131, the second conductive connecting surface 42 extends away from the second portion 132, and the fourth conductive connecting surface 52 extends toward the third portion 133, so that the second conductive connecting surface 42 and the fourth conductive connecting surface 52 can extend toward different directions, thereby facilitating connection of adjacent cells when the cells are grouped.

At least part of the first pole 40 is located in the first portion 131, i.e., at least part of the second conductive connection surface 42 is not provided to protrude from the first portion 131, whereby the space of the battery pack can be maximally utilized. The fourth conductive connecting surface 52 extends in a direction towards the third portion 133, i.e. at least part of the fourth conductive connecting surface 52 may be located within the third portion 133.

In one embodiment, the ratio of the depth of the first portion 131 to the thickness of the first battery cell 20 is 0.08-0.3, and the ratio of the depth of the first portion 131 to the thickness of the second battery cell 30 is 0.08-0.3, so that the first portion 131 can be prevented from occupying an excessive internal space on the basis of ensuring that the first portion 131 can reliably house the first pole 40, thereby ensuring that the first battery cell 20 and the second battery cell 30 can have reliable current transmission capability.

The ratio of the depth of the first portion 131 to the thickness of the first cell 20 may be 0.08, 0.09, 0.1, 0.15, 0.2, 0.22, 0.25, 0.28, or 0.3, etc.

The ratio of the depth of the first portion 131 to the thickness of the second cell 30 may be 0.08, 0.09, 0.1, 0.15, 0.2, 0.22, 0.25, 0.28, or 0.3, etc.

In one embodiment, at least part of the first pole 40 is in an integrally formed structure, and at least part of the second pole 50 is in an integrally formed structure, so that not only the forming efficiency of the first pole 40 and the second pole 50 can be improved, but also the structural strength of the first pole 40 and the second pole 50 can be improved, thereby improving the safety use performance of the battery.

The first pole 40 may include a generally L-shaped structure, which may be a one-piece structure, including the second conductive connection face 42. The second post 50 may comprise a generally L-shaped structure, which may be a one-piece structure, including the fourth conductive connection surface 52.

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

The battery of the battery pack according to an embodiment of the present utility model includes a battery case 10, a first battery cell 20, a second battery cell 30, a first electrode post 40 and a second electrode post 50, where the first battery cell 20 and the second battery cell 30 are disposed in the battery case 10 along the length direction of the battery case 10, and the first electrode post 40 and the second electrode post 50 are disposed on the same first surface 11 and are located in the middle of the first surface 11, so that electrical connection between the first electrode post 40 and the first battery cell 20 and the second battery cell 30 can be conveniently achieved, and electrical connection between the second electrode post 50 and the first battery cell 20 and the second battery cell 30 is achieved, i.e., the first electrode post 40 and the second electrode post 50 serve as two electrode output terminals of the battery. By extending the second conductive connection face 42 of the first pole 40 and the fourth conductive connection face 52 of the second pole 50 in different directions, i.e., the second conductive connection face 42 extends from one first surface 11 of the first pole 40 toward a direction away from the other first surface 11, and the fourth conductive connection face 52 extends from one first surface 11 of the first pole 40 toward a direction close to the other first surface 11, when the batteries are grouped, electrical connection between adjacent batteries can be conveniently achieved, the battery grouping ability is improved, and the battery grouping efficiency is improved.

In one embodiment, the battery pack includes a plurality of cells, two adjacent cells are connected in series, the stacking direction of the cells is perpendicular to the first surface 11, the second conductive connection surface 42 of one cell is electrically connected with the fourth conductive connection surface 52 of another cell, and the second conductive connection surface 42 is relatively close to the fourth conductive connection surface 52, so that the electrical connection of the adjacent cells can be conveniently achieved.

The second conductive connection surface 42 and the fourth conductive connection surface 52 may be connected by a bus bar, for example, the bus bar is welded to the second conductive connection surface 42, the bus bar is welded to the fourth conductive connection surface 52, and the bus bar may be a flat plate structure.

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

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

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

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

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

Claims (18)

1. A battery, comprising:

-a battery housing (10), the battery housing (10) comprising two opposing first surfaces (11) and four second surfaces (12) arranged around the first surfaces (11), the first surfaces (11) having an area larger than the area of the second surfaces (12);

a first electric core (20), wherein the first electric core (20) is arranged in the battery shell (10);

a second electric core (30), wherein the second electric core (30) is arranged in the battery shell (10), and the first electric core (20) and the second electric core (30) are arranged along the length direction of the battery shell (10);

the battery comprises a first electrode column (40), wherein the first electrode column (40) is arranged on a first surface (11), the first electrode column (40) comprises a first conductive connecting surface (41) and a second conductive connecting surface (42), the first conductive connecting surface (41) and the second conductive connecting surface (42) are respectively positioned on the inner side and the outer side of the battery shell (10), the first conductive connecting surface (41) is electrically connected with a first electric core (20) and a second electric core (30) at the same time, a first included angle is formed between the second conductive connecting surface (42) and the first surface (11), and the second conductive connecting surface (42) extends from one first surface (11) provided with the first electrode column (40) to a direction away from the other first surface (11);

the second pole (50), the second pole (50) is disposed on the first surface (11), the second pole (50) includes a third conductive connection surface (51) and a fourth conductive connection surface (52), the third conductive connection surface (51) and the fourth conductive connection surface (52) are respectively located at the inner side and the outer side of the battery case (10), the third conductive connection surface (51) is electrically connected with the first battery cell (20) and the second battery cell (30) at the same time, a second included angle is formed between the fourth conductive connection surface (52) and the first surface (11), and the fourth conductive connection surface (52) extends from one first surface (11) where the first pole (40) is disposed toward a direction close to the other first surface (11);

wherein the orthographic projection portions of the first pole (40) and the second pole (50) on the same plane along the width direction of the battery case (10) coincide, and the orthographic projection of the first pole (40) and the second pole (50) on the first surface (11) is located between at least part of the first battery cell (20) and at least part of the second battery cell (30) on the first surface (11) along the thickness direction of the battery case (10).

2. The battery according to claim 1, wherein the first and second poles (40, 50) are located in a central position area of the first surface (11) along a length direction of the battery case (10).

3. The battery of claim 1, wherein the first included angle is a right angle and the second included angle is a right angle.

4. The battery according to claim 1, characterized in that the first electrically conductive connection face (41) is parallel to the first surface (11), and the third electrically conductive connection face (51) is parallel to the first surface (11).

5. The battery according to claim 1, characterized in that the length of the battery housing (10) is not less than 400mm.

6. The battery according to claim 1, characterized in that the length of the first cell (20) is equal to the length of the second cell (30).

7. The battery according to claim 1, characterized in that the ratio of the length of the first cell (20) to the length of the battery housing (10) is 30% -49% and the ratio of the length of the second cell (30) to the length of the battery housing (10) is 30% -49%.

8. The battery according to claim 1, characterized in that the ratio of the distance between the first pole (40) and the second pole (50) to the width of the battery housing (10) is 10% -40%.

9. The battery according to claim 1, wherein the first cell (20) and the second cell (30) are connected in parallel.

10. The battery according to claim 1, wherein a first tab (21) and a second tab (22) with opposite polarities are led out from one end of the first electric core (20) opposite to the second electric core (30), and a third tab (31) and a fourth tab (32) with opposite polarities are led out from one end of the second electric core (30) opposite to the first electric core (20);

the first tab (21) is arranged opposite to the third tab (31), and the second tab (22) is arranged opposite to the fourth tab (32).

11. The battery according to any one of claims 1 to 10, characterized in that a recess (13) is provided on the battery housing (10).

12. The battery according to claim 11, wherein at least part of the first pole (40) is located within the recess (13) and at least part of the second pole (50) is located within the recess (13).

13. The battery according to claim 12, characterized in that the recess (13) comprises a first portion (131), a second portion (132) and a third portion (133), the first portion (131) communicating the second portion (132) and the third portion (133), the first portion (131) being located on the first surface (11), the second portion (132) and the third portion (133) being located on two opposite second surfaces (12), respectively;

wherein at least part of the first pole (40) is located in the first portion (131), part of the second pole (50) is located in the first portion (131), the second conductive connection surface (42) extends in a direction away from the second portion (132), and the fourth conductive connection surface (52) extends in a direction close to the third portion (133).

14. The battery according to claim 13, wherein the ratio of the depth of the first portion (131) to the thickness of the first cell (20) is 0.08-0.3, and the ratio of the depth of the first portion (131) to the thickness of the second cell (30) is 0.08-0.3.

15. The battery according to any one of claims 1 to 10, wherein at least part of the first pole (40) is of unitary construction and at least part of the second pole (50) is of unitary construction.

16. The battery according to any one of claims 1 to 10, wherein the first cell (20) comprises a first cell body (23) and first (21) and second (22) tabs extending from the first cell body (23), and the second cell (30) comprises a second cell body (33) and third (31) and fourth (32) tabs extending from the second cell body (33);

wherein the orthographic projections of the first and second poles (40, 50) on the first surface (11) are located between the orthographic projections of the first and second cell bodies (23, 33) on the first surface (11).

17. A battery comprising the battery of any one of claims 1 to 16.

18. The battery according to claim 17, characterized in that the battery comprises a plurality of cells, two adjacent cells being connected in series, the stacking direction of the cells being perpendicular to the first surface (11), the second conductive connection face (42) of one cell being electrically connected with the fourth conductive connection face (52) of the other cell.