CN219534825U - 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 includes: a battery case; the pole assembly is arranged on the battery shell, and at least part of the pole assembly is positioned outside the battery shell; the insulating piece is at least partially positioned outside the battery shell and is arranged to cover the pole assembly; the pole column assembly is provided with a connecting surface used for being connected with the busbar, one side of the insulating piece, deviating from the connecting surface, is provided with a guide surface, and the guide surface is used for being oppositely arranged with a battery shell of another battery so as to avoid contact with the battery shell of the other battery, thereby avoiding error contact of two adjacent batteries in the battery grouping process and improving the safety use performance of the battery to a certain extent.

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, in the battery grouping process, contact problems may occur between the poles of the battery and adjacent batteries, and not only risks of damaging the battery but also problems of insufficient insulation distance may occur.

Disclosure of Invention

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

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

a battery case;

the pole assembly is arranged on the battery shell, and at least part of the pole assembly is positioned outside the battery shell;

the insulating piece is at least partially positioned outside the battery shell and is arranged to cover the pole assembly;

the pole assembly is provided with a connecting surface for being connected with the busbar, and one side of the insulating piece, which faces away from the connecting surface, is provided with a guide surface which is used for being arranged opposite to the battery shell of the other battery so as to avoid being contacted with the battery shell of the other battery.

The battery of one embodiment of the utility model comprises a battery shell, a pole assembly and an insulating part, wherein the pole assembly is arranged on the battery shell, at least part of the pole assembly is positioned outside the battery shell, at least part of the insulating part is positioned outside the battery shell and covers the pole assembly, so that insulation protection of the pole assembly is realized, the pole assembly is provided with a connecting surface for being connected with a busbar, grouping of the batteries is realized, one side of the insulating part, which is away from the connecting surface, is provided with a guide surface, and the guide surface is used for being oppositely arranged with the battery shell of another battery, so that the contact with the battery shell of the other battery is avoided, the error contact of two adjacent batteries in the battery grouping process can be avoided, and the safety use performance of the batteries can be improved to a certain extent.

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

The battery pack comprises a battery, the battery comprises a battery shell, a pole assembly and an insulating part, the pole assembly is arranged on the battery shell, at least part of the pole assembly is positioned on the outer side of the battery shell, at least part of the insulating part is positioned on the outer side of the battery shell and covers the pole assembly, insulating protection of the pole assembly is achieved, the pole assembly is provided with a connecting surface used for being connected with a busbar, grouping of the batteries is achieved, one side of the insulating part, which is away from the connecting surface, is provided with a guide surface, the guide surface is used for being arranged opposite to the battery shell of another battery, contact with the battery shell of the other battery is avoided, and therefore, error contact between two adjacent batteries in the battery grouping process can be avoided, and safety use performance of the battery pack can be improved to a certain extent.

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 partial structural schematic diagram showing one view angle of a battery according to an exemplary embodiment;

fig. 2 is a partial structure diagram illustrating another view 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; 20. a pole assembly; 21. a connection surface; 22. a support part; 23. a connection part; 30. an insulating member; 31. a guide surface; 32. a first portion; 33. a second portion.

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, please refer to fig. 1 and 2, comprising: a battery case 10; the pole assembly 20, the pole assembly 20 is set up in battery case 10, and at least part of the pole assembly 20 locates outside battery case 10; an insulating member 30, at least a portion of the insulating member 30 being located outside the battery case 10 and being disposed to cover the post assembly 20; wherein the pole assembly 20 has a connection surface 21 for connection with a busbar, the side of the insulating member 30 facing away from the connection surface 21 has a guide surface 31, the guide surface 31 being arranged for being opposed to the battery housing of the other battery to avoid contact with the battery housing of the other battery.

The battery according to one embodiment of the utility model comprises a battery shell 10, a pole assembly 20 and an insulating member 30, wherein the pole assembly 20 is arranged on the battery shell 10, at least part of the pole assembly 20 is positioned on the outer side of the battery shell 10, at least part of the insulating member 30 is positioned on the outer side of the battery shell 10 and covers the pole assembly 20, thereby realizing insulating protection of the pole assembly 20, the pole assembly 20 is provided with a connecting surface 21 for connecting with a busbar, so as to realize battery grouping, and one side of the insulating member 30, which is away from the connecting surface 21, is provided with a guide surface 31, and the guide surface 31 is used for being opposite to the battery shell of another battery, so that the situation that the adjacent two batteries are in error contact in the battery grouping process can be avoided, and the safety service performance of the battery can be improved to a certain extent.

It should be noted that when the batteries are grouped, the two adjacent batteries are disposed oppositely, and the bus bar can be used for electrically connecting the connection surfaces 21 of the two adjacent batteries, at this time, the pole assembly 20 of one battery may contact with the battery housing 10 of the other battery, in this embodiment, insulation protection of the pole assembly 20 may be formed by covering the pole assembly 20 with the insulating member 30, at this time, the insulating member 30 may interfere with the battery housing 10 of the other battery, there is a risk of damaging the battery housing 10, and the guiding surface 31 is provided on a side of the insulating member 30 facing away from the connection surface 21, so that the problem of interference between the insulating member 30 and the battery housing 10 of the other battery can be effectively avoided, and meanwhile, the space utilization rate of the battery in the battery grouping can be improved, and the insulation capability between the pole assembly 20 and the battery housing 10 of the other battery can also be increased, thereby improving the safe use performance of the battery.

In one embodiment, the angle between the connecting surface 21 and the guiding surface 31 is acute, so that the problem that the insulating ability of the insulating member 30 is affected due to excessive removal of the insulating member 30 can be avoided while avoiding interference between the insulating member 30 and the battery case 10 of another battery.

In one embodiment, the connection surface 21 is substantially perpendicular to the surface of the battery housing 10 on which the post assembly 20 is disposed, so that connection of the bus bar to the connection surface 21 is facilitated when the batteries are grouped, and the bus bar is prevented from occupying an excessively large battery grouping space, thereby ensuring the energy density of the battery pack.

It should be noted that the surface of the battery case 10 provided with the post assembly 20 may be perpendicular to the stacking direction when a plurality of batteries are grouped. The connection surface 21 is substantially perpendicular to the surface of the battery case 10 on which the pole assembly 20 is provided, and here, when the protrusion is made irrespective of manufacturing errors and mounting errors, the connection surface 21 is perpendicular to the surface of the battery case 10 on which the pole assembly 20 is provided.

In one embodiment, the area of the connection surface 21 is larger than that of the guide surface 31, so that a reliable contact surface between the connection surface 21 and the bus bar can be ensured, and the insulation performance of the insulator 30 can be prevented from being affected by the excessively large guide surface 31, thereby improving the safe use performance of the battery.

In one embodiment, as shown in fig. 1, the pole assembly 20 includes: a support portion 22, the support portion 22 being provided to the battery case 10 via an insulator 30; a connection portion 23, the connection portion 23 being connected to the support portion 22, the insulator 30 covering a circumferential outer edge of the connection portion 23, the connection portion 23 including the connection surface 21; wherein, the supporting portion 22 and the connecting portion 23 have an included angle therebetween, and the guiding surface 31 is disposed on a portion of the insulating member 30 covering the connecting portion 23, so that the guiding surface 31 is disposed, and a gap can be provided between the insulating member 30 and the battery housing 10 of another battery, thereby avoiding interference problem and improving the safety performance of the battery.

An included angle is formed between the supporting portion 22 and the connecting portion 23, that is, an included angle of more than 0 and less than 180 degrees is formed between the supporting portion 22 and the connecting portion 23.

In one embodiment, the connection portion 23 is substantially perpendicular to the support portion 22, which not only simplifies the structure of the pole assembly 20, but also facilitates the electrical connection of the batteries when they are grouped.

In one embodiment, as shown in fig. 1, the insulating member 30 includes a first portion 32 and a second portion 33, the support 22 is provided on the battery case 10 through the first portion 32, the second portion 33 covers the circumferential outer edge of the connection portion 23, and the side of the second portion 33 facing away from the connection surface 21 is provided with a guide surface 31. The first portion 32 and the second portion 33 can not only form effective insulation protection for the pole assembly 20, but also ensure stable connection of the pole assembly 20 to the battery case 10, and further ensure reliable insulation distance between the pole assembly 20 and another battery, thereby improving safe use performance of the battery.

In one embodiment, as shown in fig. 1 and 2, 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 a larger area than the second surfaces 12, the pole assemblies 20 are disposed on the first surfaces 11, and the insulating members 30 are disposed on the first surfaces 11 and cover the pole assemblies 20, so that the pole assemblies 20 can have a reliable supporting surface, thereby ensuring the stability of the pole assemblies 20.

It should be noted that, 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, i.e., 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 areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but are smaller than the areas of the large surfaces.

In certain embodiments, it is not excluded that the pole assembly 20 may be disposed on the second surface 12.

In some embodiments, the number of the electrode post assemblies 20 is two, the number of the two electrode post assemblies 20 is respectively a positive electrode post assembly and a negative electrode post assembly, the number of the electrode tabs of the battery core is also two, the number of the two electrode tabs is respectively a positive electrode tab and a negative electrode tab, the positive electrode post assemblies are connected with the positive electrode tab, and the negative electrode post assemblies are connected with the negative electrode tab.

As shown in fig. 1 and 2, the battery case 10 may be provided with recesses 13, and the number of the recesses 13 may be two, and the two recesses 13 and the two pole assemblies 20 may be located on opposite surfaces of the battery case 10, respectively. At this time, when the batteries are grouped, the pole assembly 20 of another battery can be received in the recess 13, thereby increasing the energy density of the battery.

In certain embodiments, it is not excluded that the post assembly 20 of a battery may be disposed within the recess 13 of the battery.

The pole assembly 20 can be disposed at the end of the battery case 10 to facilitate connection, and the length space of the battery can be fully utilized. The two pole assemblies 20 may be disposed on the same surface of the battery case 10, or the two pole assemblies 20 may be disposed on both surfaces of the battery case 10.

The battery case 10 may have an approximately rectangular structure, that is, the battery case 10 may have a rectangular structure in which errors in manufacturing and the like are ignored.

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 batteries are laminated batteries, so that the batteries are convenient to group and long in length can be obtained through processing. 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, that is, a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the length of the cell is a,400 mm.ltoreq.a.ltoreq.2800 mm, the width of the cell is b, the height of the cell is c,2 b.ltoreq.a.ltoreq.80 b, and/or 0.5 c.ltoreq.b.ltoreq.20c.

Further, b is more than or equal to 80mm and less than or equal to 200mm, c is more than or equal to 10mm and less than or equal to 100mm.

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

The battery in the above embodiment has a large ratio of the length to the width of the battery, and further, a large ratio of the width to the height of the battery, while securing a sufficient energy density.

In one embodiment, the length of the battery is a, the width of the battery is b, and a is equal to or greater than 4b and equal to or less than 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 pack is facilitated.

In one embodiment, the height of the battery is c,3 c.ltoreq.b.ltoreq.7c, the ratio of the width to the height of the battery is large, and the battery is also conveniently formed under the condition of ensuring enough energy density.

Alternatively, the length of the battery may be 800mm-1800mm, the width of the battery may be 80mm-180mm, and the height of the battery may be 15mm-35mm.

It should be noted that the length of the battery is the dimension of the battery in the length direction, the width of the battery is the dimension of the battery in the width direction, and the height of the battery is the dimension of the battery in the height direction, i.e., the thickness of the battery.

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

The battery pack according to one embodiment of the present utility model includes a battery, the battery includes a battery case 10, a post assembly 20 and an insulating member 30, the post assembly 20 is disposed on the battery case 10, at least part of the post assembly 20 is located outside the battery case 10, at least part of the insulating member 30 is located outside the battery case 10 and covers the post assembly 20, thereby insulating the post assembly 20, the post assembly 20 has a connection surface 21 for connecting with a busbar, so as to realize grouping of the batteries, and one side of the insulating member 30 facing away from the connection surface 21 has a guide surface 31, the guide surface 31 is disposed opposite to the battery case of another battery, so as to avoid contact with the battery case of the other battery, thereby avoiding erroneous contact between two adjacent batteries during the battery grouping process, and improving the safe use performance of the battery pack to some extent.

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 case after forming the battery module, and the plurality of batteries may be fixed by the end plate and the side plate. The batteries can be directly arranged in the box body, namely, the batteries do not need to be grouped, and at the moment, the end plate and the side plate can be removed.

In one embodiment, a plurality of batteries are arranged, one of two adjacent batteries is provided with a recess 13, wherein the pole assembly 20 of the other battery is positioned in the recess 13, and the guiding surface 31 is opposite to the corner area of the battery, so that the space utilization rate of the battery pack can be effectively improved, and the energy density of the battery pack can be further improved.

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 (10)

1. A battery, comprising:

a battery case (10);

-a pole assembly (20), the pole assembly (20) being arranged to the battery housing (10), and at least part of the pole assembly (20) being located outside the battery housing (10);

an insulator (30), at least part of the insulator (30) being located outside the battery case (10) and being disposed so as to cover the post assembly (20);

wherein the pole assembly (20) has a connection surface (21) for connection to a busbar, the side of the insulating part (30) facing away from the connection surface (21) has a guide surface (31), the guide surface (31) being provided for being arranged opposite a battery housing of a further battery in order to avoid contact with the battery housing of the further battery.

2. The battery according to claim 1, characterized in that the angle between the connecting surface (21) and the guide surface (31) is an acute angle.

3. The battery according to claim 2, characterized in that the connection surface (21) is substantially perpendicular to the surface of the battery housing (10) on which the pole assembly (20) is provided.

4. The battery according to claim 1, characterized in that the area of the connecting surface (21) is larger than the area of the guiding surface (31).

5. The battery according to claim 1, wherein the post assembly (20) comprises:

a support portion (22), wherein the support portion (22) is provided to the battery case (10) through the insulating material (30);

-a connection portion (23), the connection portion (23) being connected to the support portion (22), the insulation (30) covering a circumferential outer edge of the connection portion (23), the connection portion (23) comprising the connection surface (21);

wherein an included angle is formed between the supporting part (22) and the connecting part (23), and the guide surface (31) is arranged on the part of the insulating piece (30) covering the connecting part (23).

6. The battery according to claim 5, characterized in that the connecting portion (23) is substantially perpendicular to the supporting portion (22).

7. The battery according to claim 5 or 6, characterized in that the insulating member (30) comprises a first portion (32) and a second portion (33), the support (22) being arranged on the battery housing (10) by means of the first portion (32), the second portion (33) covering the circumferential outer edge of the connection (23), the side of the second portion (33) facing away from the connection surface (21) being provided with the guide surface (31).

8. The battery according to claim 1, wherein the battery case (10) includes two opposing 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 post assembly (20) being disposed on the first surfaces (11), the insulating member (30) being disposed on the first surfaces (11) and covering the post assembly (20).

9. A battery pack comprising the battery according to any one of claims 1 to 8.

10. Battery according to claim 9, characterized in that the cells are a plurality, one of two adjacent cells is provided with a recess (13), wherein the pole assembly (20) of the other cell is located in the recess (13) and the guide surface (31) is arranged opposite to the corner region of the cell.