CN218385677U

CN218385677U - Battery pack, battery pack and automobile

Info

Publication number: CN218385677U
Application number: CN202221458708.8U
Authority: CN
Inventors: 赵冬
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2023-01-24
Anticipated expiration: 2032-06-10

Abstract

The application provides a group battery, battery package and car, this group battery includes: at least two batteries and an insulating top plate; wherein the insulating top plate is connected with at least two adjacent batteries of the at least two batteries. In the technical scheme, the insulating top plate is adopted to cover the shells of the batteries and cover the gaps between the adjacent batteries, so that metal chips or conductive foreign matters are prevented from entering the gaps between the battery shells, and the safety of the batteries is improved.

Description

Battery pack, battery pack and automobile

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack, a battery pack and an automobile.

Background

When the batteries are grouped, the batteries are fixed in a row in a bonding mode, assembled into a battery pack and then assembled into a box body of a battery pack. When the battery pack or the battery pack is used, the requirement on the insulation performance between batteries is high. However, when the battery is used, metal shavings or other conductive foreign matters easily fall into gaps between the batteries in the external environment, and short circuit between the batteries is caused, thereby affecting the safety of the battery pack.

SUMMERY OF THE UTILITY MODEL

The application provides a group battery, battery package and car for improve the security between the battery.

In a first aspect, there is provided a battery pack including: at least two batteries and an insulating top plate; wherein the insulating top plate is connected with at least two adjacent batteries of the at least two batteries.

In the technical scheme, the insulating top plate is adopted to cover the shell of the battery and cover the gap between the adjacent batteries, so that metal chips or conductive foreign matters are reduced from entering the gap between the battery shells, and the safety of the battery is improved.

In a second aspect, a battery pack is provided, which includes a case, and the battery pack of any one of the above items disposed in the case.

In a third aspect, an automobile is provided, which comprises an automobile body, and the battery pack or the battery pack as described in any one of the above arranged on the automobile body.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of an arrangement of batteries provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another battery pack provided in the embodiment of the present application;

fig. 4 is a schematic diagram of the cooperation between the insulating top plate and the battery according to the embodiment of the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

To facilitate understanding of the battery pack provided in the embodiments of the present application, first, a structure of the battery pack is described, where the battery pack includes at least two batteries, and the at least two batteries are arranged in a group. The embodiment of the present application provides a battery pack to improve safety of batteries by providing a gap between the batteries when the batteries are arranged, thereby causing metal chips or conductive foreign substances to enter the gap between the batteries, thereby causing a short circuit of the batteries. The details of which are set forth in the accompanying drawings and the examples below.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a battery pack provided in an embodiment of the present application. The battery pack provided by the embodiment of the present application includes at least two batteries 100, such as two, three, four, five, and other different numbers of batteries 100.

Referring to fig. 2 together, as an alternative, the battery pack provided in the embodiment of the present application may include one row of cells 100 or at least two rows of cells 100, where each row of cells 100 is arranged along a first direction; when the number of the batteries 100 is at least two, the batteries 100 in the at least two rows are arranged along the second direction, and two rows of the batteries 100 are illustrated in fig. 2, but the arrangement number of the batteries 100 is not particularly limited in the embodiment of the present application, and may be set according to actual needs. Wherein the first direction intersects the second direction, such as the first direction is perpendicular to the second direction, or the first direction and the second direction form an acute angle or an obtuse angle. It should be understood that the embodiments herein refer to the battery 100 as a battery 100 comprising a housing, a cell, and a pole assembly, which does not comprise a separate insulating top plate.

For convenience of description, the top, bottom and side surfaces of the battery are defined. The bottom surface of the battery 100 is opposite to the top surface, the top surface of the battery 100 is the surface of the battery 100 on which the tab 101 is disposed, and the bottom surface of the battery 100 is the surface opposite to the top surface. The sides of the battery 100 have large sides with larger dimensions and small sides with smaller dimensions. When the battery 100 is assembled in the case of the battery pack, the bottom surface of the battery 100 is parallel to the bottom plate of the battery pack, that is, the bottom surface of the battery 100 is parallel to the bottom plate of the case. The sides of the battery 100 are perpendicular to the bottom plate of the battery pack.

As an alternative, when at least two batteries 100 are arranged in at least one row, the arrangement direction is parallel to the large side of the battery.

With continued reference to fig. 1, the battery pack provided by the embodiment of the present application further includes an insulating top plate 200, and the insulating top plate 200 is connected to at least two adjacent batteries 100 of the at least two batteries 100. The insulating top plate 200 may be made of an insulating material, and is used to insulate the cases of the battery 100, thereby preventing short circuits between the cases of the battery 100 or between the cases of the battery 100 and an external circuit. For example, the insulating top plate 200 may be made of insulating resin, insulating plastic, or the like.

The adjacent two batteries 100 of the at least two batteries 100 may be referred to as the adjacent two batteries 100 in the battery row in the same row, that is, the length direction of the insulating top plate 200 is along the first direction; or the length direction of two adjacent batteries 100, i.e., the insulating top plate 200, located in the adjacent battery row is along the second direction. The same manner can be applied to the engagement between the top insulating plate 200 and the cells 100 regardless of the arrangement direction of the cells 100 and the arrangement direction of the top insulating plate 200, and thus in the present embodiment, the description will be made taking the longitudinal direction of the top insulating plate 200 along the first direction as an example.

When the insulating top plate 200 is connected to the battery 100, different connection methods may be used. Illustratively, the insulating top plate 200 is fixedly coupled to the corresponding battery 100. For example, the insulating top plate 200 and the battery 100 may be fixedly connected by means of snap fastening, heat fusion, adhesion or by means of a threaded connector (bolt or screw), and of course, other connection methods may be used besides the above connection method.

The correspondence between the insulating top plate 200 and the battery 100 may be divided into different cases, and the following description will be made one by one.

The connection of the insulating top plate 200 with at least two adjacent batteries 100 of the at least two batteries 100 is represented by: the insulating top plate 200 is fixedly connected with a part of the batteries 100 of the at least two batteries 100; alternatively, the insulating top plate 200 is fixedly connected to all of the at least two batteries 100.

Specifically, the cells 100 are arranged in rows as an example. At least two batteries 100 are arranged in at least one row, such as one row, two rows, three rows, and the like. The corresponding manner of the insulating top plate 200 to each row of the batteries 100 may be variously adopted. That is, one row of cells corresponds to one insulating top plate 200, and one row of cells corresponds to at least two insulating top plates 200. The following description will be made separately.

As shown in fig. 1, when one row of the batteries 100 corresponds to one insulating top plate 200, the insulating top plate 200 is connected to each corresponding battery 100. So that all gaps between the row of the batteries 100 can be closed by the insulating top plate 200. When the external metal chips or the conductive foreign matters fall into the box body of the battery pack, the metal chips or the conductive foreign matters can be prevented from falling into the gaps between the batteries 100 through the insulating top plate 200, so that the risk of short circuit between the batteries 100 is reduced, and the safety of the batteries 100 is improved. Therefore, the risk of safety of the whole battery pack caused by foreign matters such as metal chips falling between the batteries 100 can be improved.

As an alternative, in the row of the batteries 100, the insulating top plate 200 is fixedly connected to each of the batteries 100, so that the row of the batteries 100 can be fixedly connected through the insulating top plate 200. Compared with the mode that the batteries 100 are only bonded through the bonding glue, another fixing mode is added, namely the batteries 100 are bonded through the bonding glue and connected through the insulating top plate 200, and therefore the structural strength of the whole battery pack is improved.

In addition, when all the batteries 100 are covered with the insulating top plate, the insulating top plate does not need to be assembled independently for each battery, and the overall assembly efficiency of the battery pack can be improved.

As shown in fig. 3, when a row of the batteries 100 corresponds to at least two insulating top plates 201, each insulating top plate 201 is connected to at least two adjacent batteries 100 in the corresponding row of the batteries 100. That is, in one row of the battery 100, the number of the insulating top plates 201 is different from two, three, and the like, and two insulating top plates 201 are illustrated in fig. 3 as an example. A gap is left between the two insulating top plates 201 for the convenience of distinguishing the two insulating top plates 201, but it should be understood that there is no gap between the insulating top plates 201 when the two insulating top plates 201 are connected to the battery 100.

Each insulating top plate 201 connects at least two adjacent batteries 100. Illustratively, one insulating top plate 201 may connect two, three, four, etc. different numbers of cells 100. For at least two insulating top plates 201, the number of the batteries 100 connected to different insulating top plates 201 may be the same or different, and is not particularly limited in the embodiment of the present application. In this scheme, all gaps between the row of batteries 100 can be sealed through the insulating top plate 200, so that the risk of short circuit between the batteries 100 is reduced, and the safety of the batteries 100 is improved. Therefore, the risk of safety of the whole battery pack caused by foreign matters such as metal chips falling between the batteries 100 can be improved.

In addition, when a row of batteries 100 corresponds to at least two insulating top plates 201, at least two batteries 100 can be adhered to each insulating top plate 201, and the connection strength of the battery pack can be improved to a certain extent. Meanwhile, when the above method is adopted, the length of the insulating top plate 201 is relatively small, and the insulating top plate 201 is convenient to prepare and mount in cooperation with the battery 100.

In addition, when a row of batteries corresponding to at least two insulating top plates 201 is adopted, the whole assembly efficiency of the battery pack can be improved.

As an alternative, when at least two insulating top plates 200 correspond to each row of the batteries 100, the insulating top plates 200 may be fixedly connected by splicing. Such as by snap-fit fastening, by adhesive bonding, or by threaded fasteners (screws or bolts).

In addition, when the batteries 100 are arranged in a row, the above-described two types of arrangement of the insulating top plates can be adopted. When the batteries 100 are arranged in at least one row, each row of batteries 100 can adopt a corresponding insulating top plate 200; or at least two insulating top plates 201 corresponding to each row of the batteries 100; or a part of the rows of the batteries 100 corresponds to one of the insulating top plates 200, and the other part of the rows of the batteries 100 corresponds to at least two of the insulating top plates 201.

Referring to fig. 1 and 4, as an alternative, when the insulating top plates 200 are fixedly connected to the batteries 100, in order to facilitate the positioning of the batteries 100, at least one of the insulating top plates 200 has a stopper 220 inserted into a gap between the corresponding batteries 100. During assembly, the limiting structure 220 is inserted into a gap between two adjacent batteries 100, so that the positioning between the insulating top plate 200 and the batteries 100, i.e., the installation of the insulating top plate 200, is facilitated.

The limiting structure 220 may be a limiting protrusion, a limiting post, or the like, and when the limiting structure 220 is matched with the insulating top plate 200, the limiting structure 220 and the insulating top plate may be integrated or separated. When the insulating top plate 200 and the limiting structure 220 are of a separate structure, they may be connected by adhesion. When an integrated structure is adopted, the insulating top plate 200 and the limiting structure 220 can be integrally manufactured and formed in an injection molding mode.

As an alternative, the gap between the corresponding batteries 100 is a gap formed between corners of the surfaces of the adjacent two batteries 100 connected to the insulating top plate. The surface of the battery 100 connected to the insulating top plate is the top surface of the case. Illustratively, the corner may be a rounded corner or a beveled corner (i.e., a structure formed by cutting away the edge of the top surface of the cell). As an alternative, in the embodiment of the present application, the corner is a circular arc angle. Through set up the arc angle on the casing, adopt the right angle relatively and can increase the clearance between battery 100 and the battery 100 to increase limit structure 220's size, conveniently fix a position. In addition, the rounded corners may improve the influence of the spacing structure 220 on the spacing between the batteries 100, ensuring the energy density of the battery pack.

As an alternative, the insulating top plate 200 has through holes 210 that nest with the features 110 of the top surface of the corresponding battery 100 when the insulating top plate 200 is disposed. The number of the through holes 210 corresponds to the number of the structural features of the top surface of the battery 100, i.e., one through hole 210 may be used to expose all the structural features, or at least two through holes 210 may be used to respectively correspond all the structural features, i.e., at least two through holes 210 are used to expose the structural features respectively. The features 110, which may be the top surface of the battery 100, include a post assembly and/or an explosion-proof valve, and/or a battery identification structure. The battery identification structure can be a two-dimensional code or other structures capable of identifying battery information. Illustratively, the features 110 may comprise any of a post assembly, an explosion-proof valve, a battery identification structure; or the structural features 110 comprise any two of a post assembly, an explosion-proof valve, and a battery identification structure; or the structural feature 110 comprises a post assembly, an explosion-proof valve, a battery identification structure.

Of course, in addition to the above-mentioned exemplary structural features, other structural features that need to be exposed may also be exposed through the through hole 210.

The shape of the through hole 210 is not specifically limited in the embodiment of the present application, and may be a hole with different shapes, such as a circular hole, a square hole, an elliptical hole, or a special-shaped hole.

When the characteristic structure is matched with the through hole in a nesting mode, different matching modes such as interference fit or clearance fit can be adopted between the through hole and the characteristic structure. As an alternative, the through-holes 210 are clearance fit with the corresponding features 110. Thereby facilitating the assembly of the insulating top panel 200 and avoiding the difficulty in the assembly of the insulating top panel 200 due to assembly errors. Illustratively, the gap between the via 210 and the corresponding feature 110 is between 0.1 and 4mm. Such as gaps of different sizes, e.g., 0.1mm, 1mm, 2mm, 3mm, 4mm, etc. Preferably, the clearance between the through-hole 210 and the corresponding feature 110 is between 0.5 and 2mm. Such as gaps of different sizes, e.g. 0.5mm, 1mm, 1.5mm, 2mm, etc.

When the batteries are arranged in the direction parallel to the large side surfaces of the batteries, the batteries are opposite to the small side surfaces between the batteries, namely, the width of the small side surfaces in the second direction is the width of the gap between the batteries. By the arrangement, the gap between the batteries can be covered by the narrow insulating top plate. In addition, by adopting the arrangement mode, the gaps between the through holes which are arranged on the insulating top plate and correspond to the characteristic structures of the batteries can be far away, so that the processing is convenient.

It should be understood that, in the above technical solutions, as for alternative solutions, the embodiments of the present application may combine optional features to obtain different battery packs according to actual product requirements.

As can be seen from the above description, the insulating top plate 200 is used as a structure for enhancing the connection strength between the batteries 100, and the insulating top plate 200 is fixedly connected to at least two batteries 100, so that it is ensured that, in addition to the bonding of the side adhesive between the two batteries 100, the connection strength can be enhanced by the insulating top plate 200, and the stability of the whole battery pack is improved. And the fitting between the insulating top plate 200 and the battery 100 can be facilitated by the provision of the through-holes 210 or the stopper structures 220.

The embodiment of the application also provides a battery pack, which comprises a box body and the battery pack arranged in the box body.

In the technical scheme, the insulating top plate is adopted as a structure for enhancing the connection strength between the batteries, and the insulating top plate is fixedly connected with at least two batteries, so that the connection strength can be enhanced through the insulating top plate except for the bonding of the bonding glue on the side surface between the two batteries when the batteries are connected, and the stability of the whole battery pack is improved.

The embodiment of the application also provides an automobile which comprises an automobile body and the battery pack or the battery pack arranged on the automobile body.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on operational states of the present application, and are only used for convenience in describing and simplifying the present application, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims

1. A battery pack, comprising: at least two batteries and an insulating top plate; wherein the insulating top plate is connected with at least two adjacent batteries of the at least two batteries;

the battery is provided with a top plate and a bottom plate which are oppositely arranged, and a side surface arranged between the top plate and the bottom plate of the battery; the side surface of the battery is provided with a large side surface with a larger size and a small side surface with a smaller size;

when the at least two batteries are arranged in at least one row, the arrangement direction is parallel to the large side of the batteries.

2. The battery of claim 1, wherein the at least two cells are arranged in at least one row;

at least one row of batteries corresponds to one insulating top plate; and the insulating top plate is connected with each corresponding battery.

3. The battery of claim 1, wherein the at least two cells are arranged in at least one row; wherein,

at least one row of cells corresponds to at least two insulating top plates.

4. The battery pack according to any one of claims 1 to 3, wherein at least one of the insulating top plates has a stopper structure inserted into a gap between the corresponding cells.

5. The battery pack according to claim 4, wherein the gap between the corresponding cells is a gap formed between corners of a surface where two adjacent cells are connected to the insulating top plate.

6. The battery according to claim 5, wherein the corners of the cells are radiused.

7. The battery of claim 4, wherein said insulating top plate has through holes that nest with features of the connected cell surface.

8. The battery of claim 7, wherein the through-holes are a clearance fit with the corresponding features.

9. The battery of claim 8, wherein a gap between the through-hole and the corresponding feature is between 0.1-4mm.

10. The battery of claim 9, wherein a gap between the through-hole and the corresponding feature is between 0.5-2mm.

11. The battery of claim 10, wherein the features of the top surface of the cell comprise a post assembly and/or an explosion-proof valve and/or a cell identification structure.

12. The battery according to any one of claims 1 to 3, wherein the insulating top plate is fixedly connected to the corresponding battery.

13. A battery pack comprising a case, and the battery pack according to any one of claims 1 to 12 disposed in the case.

14. An automobile comprising a vehicle body, and a battery pack according to any one of claims 1 to 12 or a battery pack according to claim 13 provided on the vehicle body.