WO2022073233A1

WO2022073233A1 - Battery cell holder, battery cell module, and battery pack

Info

Publication number: WO2022073233A1
Application number: PCT/CN2020/120188
Authority: WO
Inventors: 韦银涛; 王微; 蒙玉宝; 郭燕春; 蔡鹏�
Original assignee: 湖北亿纬动力有限公司
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2022-04-14

Abstract

Provided are a battery cell holder (30), a battery cell module (100), and a battery pack; the battery cell holder (30) is arranged to hold the battery cell (10) in the battery cell module (100); the battery cell holder (30) comprises a clamp plate (1) and two side plates (2) attached to the two ends of the clamp plate (1), respectively; the two side plates (2) and the clamp plate (1) together enclose an accommodating groove; the end part of the battery cell (10) is at least partially accommodated in the accommodating groove; a recess (111) is provided on the side of the clamp plate (1) directly opposite to the battery cell (10); the recess (111) is filled by a flexible member (1111), and the flexible member (1111) is capable of abutting against the battery cell (10).

Description

Cell holder, cell module and battery pack

technical field

The present application relates to the field of battery technology, for example, to a battery holder, a battery module and a battery pack.

Background technique

At present, with the development of battery pack energy storage technology, the safety and quality of battery packs have also received more and more attention. In order to enhance the safety of the battery pack and prevent the single cells in the cell module from colliding with each other due to bumps or vibrations during transportation and assembly, cell brackets are usually used to fix the cells, thereby strengthening the cell module. mechanical strength of the group.

There is not enough space reserved between the cell support and the cell in the related art. Therefore, the cells are heated and swelled, and the end plates and other assembly structures will be cracked by the expansion force, which destroys the structural stability of the cell module and reduces the life of the cell module and the battery pack. Moreover, the battery cell bracket in the related art generally adopts an integrated structure, and the specific size is matched with the battery cell, resulting in a large overall size and a heavy weight of the battery cell bracket, which increases the installation difficulty and manufacturing cost of the battery cell bracket. . At the same time, there is no heat dissipation structure reserved on the battery holder, which aggravates the expansion of the battery when it heats up.

SUMMARY OF THE INVENTION

The present application provides a cell support, which can handle the situation that the structural stability of the cell module is poor when the cell expands.

An embodiment provides a cell support, which is configured to fix the cells in the cell module, the cell support includes a splint and two side plates respectively connected to both ends of the splint, the two side plates are connected to The splint encloses an accommodating groove, and the end of the battery core is at least partially accommodated in the accommodating groove, a groove is formed on the side of the splint that is opposite to the battery core, and the groove is filled with and an elastic member, which can be in contact with the battery core.

The present application provides a cell module, which can handle the situation that the cell module has poor structural stability when the cell expands.

An embodiment provides a cell module including a plurality of the above-mentioned cell supports.

The present application provides a battery pack, which can handle the situation that the battery pack has poor structural stability when the cells are expanded.

An embodiment provides a battery pack, including the above-mentioned battery cell module.

Description of drawings

1 is a schematic diagram of the assembly of four cell supports and a single cell provided by an embodiment of the present application;

2 is a schematic structural diagram of a cell support provided by an embodiment of the present application;

3 is a schematic structural diagram of a cell module provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of an elastic member provided by an embodiment.

The names and labels of the parts in the figure are as follows:

100, cell module; 10, cell; 20, cable tie; 30, cell support; 40, end plate;

1. Plywood; 11. Boss; 111. Groove; 1111. Elastic part; 12. Weight reduction hole; 13. Heat dissipation hole; 2. Side plate; 21. Limiting part; 22. Buckle head.

Detailed ways

In the description of this application, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for convenience of description and simplified operation, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

As shown in FIGS. 1-3 , this embodiment discloses a cell support 30 for fixing the cells 10 in the cell module 100 . The cell support 30 includes a clamping plate 1 and two side plates 2 respectively connected to both ends of the clamping plate 1. The two side plates 2 and the clamping plate 1 enclose a receiving groove. The end of the battery cell 10 is at least partially contained in the receiving groove. A groove 111 is formed on the side facing the battery cell 10 on 1 . The groove 111 is filled with an elastic member 1111 (refer to FIG. 4 ), and the elastic member 1111 can abut against the battery cell 10 .

In this embodiment, grooves 111 are formed on both sides of the clamping plate 1 of the cell support 30 , and the elastic members 1111 are filled in the grooves 111 , so that the clamping plate 1 abuts the battery cell 10 through the elastic members 1111 . The elastic member 1111 can absorb the expansion and deformation of the battery cell 10 , thereby improving the structural stability of the battery cell module 100 .

Optionally, the length of the splint 1 is equal to the length of the battery cell 10 , that is, the length of the accommodating slot is equal to the length of the battery cell 10 . When the cell 10 is located in the accommodating slot, the two side plates 2 can abut against the cell 10 , which is conducive to the stable installation of the cell 10 and the cell holder 30 and avoids the relative occurrence between the cell 10 and the cell holder 30 . The displacement realizes the horizontal installation of the cell support 30 .

Optionally, the depth of the groove 111 is 0.25mm, and the thickness of the elastic member 1111 is 0.8mm. The elastic member 1111 can be optionally a silicone pad, which has good insulating properties and elasticity, and is cheap and easy to obtain. When the cell support 30 of this embodiment is installed between the cells 10 of the cell module 100 , the thickness of the elastic member 1111 is compressed to 0.5 mm. When the battery cell 10 expands, the elastic member 1111 is compressed and absorbs the expansion deformation of the battery cell 10 , which effectively prevents the end plate 40 and other installation structures of the battery cell module 100 from being cracked by force. At the same time, the problem of uneven gap between the battery core 10 and the clamping plate 1 caused by the poor flatness of the battery core 10 is eliminated.

Optionally, a limiting portion 21 is extended from the top of the side plate 2 toward the direction of the clamping plate 1 , and the limiting portion 21 can abut against the upper end or the lower end of the battery cell 10 . The side plate 2 of this embodiment is provided with a limiting portion 21 extending inwardly, and the limiting portion 21 is arranged horizontally. When the cell support 30 is installed on the upper end or the lower end of the cell 10 , the limiting portion 21 abuts against the end face of the upper end or the lower end of the cell 10 , thereby realizing the installation and positioning of the cell support 30 in the vertical direction. . The side panel 2 of the present embodiment has a top and a bottom described below in the height direction of the cleat 1 . When the cell support 30 is installed on the cell 10 , the portion of the side plate 2 close to the upper or lower end of the cell 10 is the top, and the portion far from the upper or lower end of the cell 10 is the bottom.

Optionally, the splint 1 is provided with a weight reduction hole 12 . The weight-reducing hole 12 penetrates through two side surfaces of the bottom of the accommodating groove on the splint 1 , so that the two accommodating grooves communicate with each other through the weight-reducing hole 12 . The weight-reducing hole 12 is beneficial to reduce the weight of the cell support 30 and the processing of the heat-dissipating hole 13 described below. Moreover, it is conducive to the rapid heat dissipation of the battery cell 10 . The weight reduction hole 12 in this embodiment is a square hole. The weight reduction holes 12 may also be two, three or more than three, and their specific shapes may also be circular or other shapes.

Optionally, both sides of the clamping plate 1 are provided with bosses 11 , and the grooves 111 are located on the corresponding bosses 11 . The groove 111 is arranged on the boss 11, so that the height of the elastic member 1111 in the groove 111 is always higher than the side surface of the splint 1, which ensures that the elastic member 1111 first contacts the battery cell when the battery cell bracket 30 and the battery cell 10 are installed. 10, and the splint 1 is always in contact with the battery core 10 through the elastic member 1111.

Optionally, the clamp plate 1 is provided with heat dissipation holes 13 , and the heat dissipation holes 13 pass through both ends of the clamp plate 1 in the height direction. The heat generated by the battery cells 10 can be quickly discharged through the heat dissipation holes 13 , which is beneficial to improve the heat dissipation efficiency of the battery cells 10 . At the same time, the heat dissipation holes 13 reduce the weight of the cell support 30 , which is beneficial to realize the lightweight of the cell support 30 .

Optionally, the number of heat dissipation holes 13 is multiple, and the plurality of heat dissipation holes 13 are arranged side by side along the length direction of the clamping plate 1 . The number of the heat dissipation holes 13 in this embodiment is multiple, which improves the heat dissipation efficiency of the battery cell 10 . In this embodiment, the cross-sectional shape of the heat dissipation hole 13 is square. In one embodiment, the cross-sectional shape of the heat dissipation hole 13 may also be a circle or other polygons, which will not be repeated here.

As shown in FIG. 3 , this embodiment further discloses a battery module 100 . The cell module 100 includes the above-mentioned cell support 30 , which improves the stability and safety of the cell module 100 .

Optionally, the cell module 100 further includes a plurality of cells 10 arranged side by side, the two sides of the splint 1 and the side plate 2 of each cell support 30 enclose a receiving groove, and any two adjacent cells Two cell supports 30 are sandwiched between the cells 10 , and the two cell supports 30 are oppositely disposed at the upper and lower ends of the cell 10 . Compared with the one-piece bracket in the related art, the two cell brackets 30 on the upper and lower ends of the battery cell 10 are relatively arranged to form a split bracket, which reduces the size and weight of the cell bracket 30 and facilitates the fast and convenient operation of the cell bracket 30. Install. At the same time, there is a large gap between the two battery cell brackets 30 disposed opposite to each other at the upper and lower ends of the battery cell 10 , which is conducive to the heat dissipation of the battery cell 10 .

As shown in FIG. 1 and FIG. 2 , the two side plates 2 in the cell support 30 are respectively connected to both ends of the splint 1 in the length direction, and form an "I"-shaped frame. The "I"-shaped frame has accommodating grooves for accommodating cells 10 on both sides of the clamping plate 1, the two side plates 2 are the side walls of the accommodating groove, and the clamping plate 1 is the groove bottom of the accommodating groove. The cell module 100 in this embodiment further includes a cable tie 20 and an end plate 40 . A plurality of cells 10 are arranged side by side between the two end plates 40 . The number of the wire ties 20 is two, and the two wire ties 20 are respectively sleeved on the plurality of cell supports 30 at the upper end of the battery cell 10 and the plurality of battery cell supports 30 at the lower end of the battery cell 10 . The cable tie 20 can bind the end plate 40 , the cell 10 and the cell support 30 together to form the cell module 100 with a stable structure.

Optionally, the bottom of the side plate 2 is extended in a direction away from the splint 1 and is provided with a buckle head 22 , and the buckle head 22 can cooperate with the cable tie 20 to fix the cell module 100 .

The buckle head 22 in this embodiment has a horizontal plane, and the cable tie 20 can abut against the horizontal plane of the buckle head 22 when bundling the battery cell 10 and the battery cell support 30, so that the cable tie 20 has an installation position in the vertical direction, and realizes The cable ties 20 are installed quickly and efficiently. The fixed installation of the cell 10 in this embodiment does not require long screws or laser welding, which greatly improves the fixed installation of the cell support 30 and the cell 10, and improves the assembly efficiency of the cell module 100.

This embodiment also discloses a battery pack (not shown in the figure), where the battery pack includes the above-mentioned battery cell module 100 . The elastic member 1111 in the battery pack can absorb the expansion and deformation of the battery cell 10, so as to prevent the battery pack from being cracked by force, and improve the stability and safety of the battery pack. The split support structure formed by the two cell supports 30 between the two adjacent cells 10 makes the structure of the cell supports 30 simple, facilitates installation, and improves the assembly efficiency of the battery pack.

The beneficial effects of this application are:

In the cell support 30 of this embodiment, grooves 111 are formed on both sides of the splint 1 , and elastic members 1111 are filled in the grooves 111 , so that the splint 1 abuts against the cell 10 through the elastic members 1111 . The elastic member 1111 can absorb the expansion and deformation of the battery cell 10 , thereby preventing the end plate 40 and other assembly structures of the battery cell module 100 from being cracked by force, and improving the stability of the battery cell module 100 .

The battery module 100 of this embodiment includes the above-mentioned battery support 30 . By opening grooves 111 on both sides of the splint 1 and filling the grooves 111 with elastic members 1111 , the splint 1 is abutted against the power supply through the elastic members 1111 . Core 10. The elastic member 1111 can absorb the expansion and deformation of the battery cell 10 , avoid the end plate 40 and other assembling structures of the battery cell module 100 from being cracked by force, and improve the stability of the assembling structure in the battery cell module 100 . The two cell supports 30 are relatively installed between any two adjacent cells 10. Compared with the integrated support structure in the related art, the split structure composed of the two cell supports 30 makes the cell support The structure of 30 is simple and easy to install, which reduces the manufacturing cost of the battery module 100 . At the same time, the gap formed between the two cell supports 30 is conducive to rapid heat dissipation.

The battery pack of the present application includes the above-mentioned cell module 100 . By opening grooves 111 on both sides of the splint 1 and filling the grooves 111 with elastic members 1111 , the splint 1 is abutted against the cells 10 through the elastic members 1111 . The elastic member 1111 can absorb the expansion and deformation of the battery cell 10, avoid the end plate 40 and other assembly structures of the battery cell module 100 from being cracked by force, and improve the stability of the assembly structure in the battery pack. The two cell supports 30 are relatively installed between any two adjacent cells 10. Compared with the integrated support structure in the related art, the split structure composed of the two cell supports 30 makes the cell support 30 has a simple structure, is easy to install, and reduces the manufacturing cost of the battery pack. At the same time, the gap formed between the two cell supports 30 is conducive to rapid heat dissipation.

Claims

A cell support (30), which is configured to fix the cells (10) in a cell module (100), the cell support (30) comprises a clamp plate (1) and two clamp plates (1) and two respectively connected to the clamp plate (100). 1) Side plates (2) at both ends, the two side plates (2) and the splint (1) enclose an accommodation groove, and the ends of the battery cells (10) are at least partially accommodated in the accommodation grooves , a groove (111) is formed on the side of the splint (1) facing the battery core (10), the groove (111) is filled with an elastic member (1111), and the elastic member (1111) ) can be in contact with the battery core (10).
The cell support (30) according to claim 1, wherein a limiting portion (21) is extended from the top of the side plate (2) toward the direction of the clamping plate (1), and the limiting portion (21) ) can be in contact with the upper end or the lower end of the battery cell (10).
The cell support (30) according to claim 1, wherein a snap head (22) is extended at the bottom of the side plate (2) away from the direction of the splint (1), and the snap head ( 22) The cable ties (20) of the battery core module (100) can be matched to fix the battery core module (100).
The cell support (30) according to claim 1, wherein a weight reduction hole (12) is opened on the clamping plate (1).
The cell support (30) according to claim 1, wherein bosses (11) are respectively provided on both sides of the splint (1), and the grooves (111) are located on the corresponding bosses (11) )superior.
The battery cell support (30) according to claim 1, wherein the clamping plate (1) is provided with heat dissipation holes (13), the heat dissipation holes (13) passing through two parts in the height direction of the clamping plate (1). end.
The cell support (30) according to claim 6, wherein the number of the heat dissipation holes (13) is multiple, and the multiple heat dissipation holes (13) are arranged side by side along the length direction of the clamping plate (1). .
A cell module (100), comprising a plurality of cell supports (30) according to claim 1.
A cell module (100), comprising a plurality of cell supports (30) according to claim 2.
A cell module (100), comprising a plurality of cell supports (30) according to claim 3.
A cell module (100), comprising a plurality of cell supports (30) according to claim 4.
A cell module (100), comprising a plurality of cell supports (30) according to claim 5.
A cell module (100), comprising a plurality of cell supports (30) according to claim 6.
A cell module (100), comprising a plurality of cell supports (30) according to claim 7.
The battery cell module (100) according to claim 8, further comprising a plurality of the battery cells (10) arranged side by side, the two side surfaces of the clamping plate (1) of each of the battery cell brackets (30) The accommodating grooves are respectively enclosed with the side plate (2), and two battery core brackets (30) are sandwiched between any two adjacent battery cores (10). The battery core support (30) is relatively arranged at the upper and lower ends of the battery core (10).
The battery cell module (100) according to claim 9, further comprising a plurality of the battery cells (10) arranged side by side, the two side surfaces of the clamping plate (1) of each of the battery cell brackets (30) The accommodating grooves are respectively enclosed with the side plate (2), and two battery core brackets (30) are sandwiched between any two adjacent battery cores (10). The battery core support (30) is relatively arranged at the upper and lower ends of the battery core (10).
The battery cell module (100) according to claim 10, further comprising a plurality of the battery cells (10) arranged side by side, the two side surfaces of the clamping plate (1) of each of the battery cell brackets (30) The accommodating grooves are respectively enclosed with the side plate (2), and two battery core brackets (30) are sandwiched between any two adjacent battery cores (10). The battery core support (30) is relatively arranged at the upper and lower ends of the battery core (10).
A battery pack, comprising the battery cell module (100) according to claim 15.
A battery pack, comprising the battery cell module (100) according to claim 16.
A battery pack, comprising the battery cell module (100) according to claim 17.