CN217485614U

CN217485614U - Buffer device and battery module

Info

Publication number: CN217485614U
Application number: CN202221374956.4U
Authority: CN
Inventors: 朱圣法; 杨文兵; 白玉龙; 付方凯; 何亚飞
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-09-23
Anticipated expiration: 2032-06-02

Abstract

The utility model relates to a battery manufacturing technology field especially relates to a buffer and battery module. The buffer device is used for buffering between the battery cell monomers, and at least one side face of the buffer device is abutted against the battery cell monomers. The damping device mainly comprises an elastic piece. This elastic component includes a plurality of elasticity core, and elasticity core extends in the second direction, and elasticity core is compressible in the first direction, and along the third direction, elasticity core sets up to a plurality ofly, and two adjacent elasticity cores equally spaced sets up. Therefore, when the electric core monomer generates thermal expansion, the elastic core is extruded by the electric core monomer and deforms, so that the expansion force of the electric core monomer is absorbed, the risk of extrusion collision of the electric core monomer is avoided, and the safety performance of the electric core monomer is improved. This battery module can provide certain inflation space for electric core monomer, improves battery module's security performance.

Description

Buffer device and battery module

Technical Field

The utility model relates to a battery manufacturing technology field especially relates to a buffer and battery module.

Background

With the development of economy and the improvement of science and technology, the power battery is more and more favored by people. The power battery is usually formed by combining a plurality of single battery cells, and after long-term use, the single battery cells may expand and deform, which may cause extrusion collision among the single battery cells.

At present, in the prior art, foam is usually arranged between a plurality of single battery cells in a power battery pack as a buffer gasket material to buffer mutual collision between the single battery cells or absorb tolerance generated by expansion caused by charging and discharging of the single battery cells. However, the foam in the conventional technology has the following disadvantages: on one hand, the foam has limited compression amount and small expansion range, so that the use range of the foam is limited; on the other hand, the foam material is soft and is not suitable for pre-tightening the single battery cell generating large expansion force.

Therefore, it is desirable to design a buffer device and a battery module to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a buffer, its simple structure can cushion the bulging force between the electric core monomer, avoids taking place the extrusion collision between the adjacent electric core monomer, improves electric core monomer security performance.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a buffer for buffering between electric core monomer, at least one side of buffer with electric core monomer supports and leans on, buffer includes:

an elastic member comprising a plurality of elastic cores extending in a second direction,

the resilient core is compressible in a first direction.

As an optional technical solution of the buffer device, a projected area of the elastic core along the second direction is S1, a product of a length of the elastic core along the first direction and a length of the elastic core along the third direction is S2, a ratio of S1 to S2 is K, and a value of K ranges from 0 to 0.7.

As an optional technical scheme of a buffer device, the elastic core comprises a first buffer part and a second buffer part, wherein the first buffer part is arranged on the cross section of the plane where the first direction and the third direction are located, and the second buffer part is arranged on the cross section of the plane where the first direction and the third direction are located, and the cross sections of the first direction and the third direction are both in a wave shape or a fold line shape.

As an optional technical solution of the buffering device, the first buffering portion and the second buffering portion are integrally formed or welded to each other.

As an optional technical scheme of the buffer device, the elastic core is made of hard plastics or metal sheets.

As an optional technical solution of the buffering device, the buffering device includes a first side plate and a second side plate, and along the first direction, the first side plate and the second side plate are respectively disposed on two sides of the elastic core, and the first side plate and the second side plate are both abutted against the elastic core.

As an optional technical solution of the buffer device, the buffer device includes a connection column, the connection column is disposed between the first side plate and the second side plate, and the connection column abuts against an end face of the elastic core.

As an optional technical scheme of the buffer device, the buffer device comprises a positioning piece, a through hole is formed in the connecting column, one end of the positioning piece penetrates through the through hole, and the other end of the positioning piece is inserted in the elastic core.

As an optional technical scheme of the buffer device, along a third direction, the elastic cores are arranged in a plurality of numbers, and every two adjacent elastic cores are arranged at equal intervals.

As an optional technical solution of the buffering device, along the second direction, the length of the elastic core is smaller than the length of the first side plate.

As an optional technical scheme of the buffer device, the first side plate and the second side plate are both made of plastic or metal materials.

A second object of the present invention is to provide a battery module, which has high safety and can provide a certain expansion space for the battery cell.

the utility model provides a battery module, battery module include as above buffer and a plurality of electric core monomer, at least one side of buffer with electric core monomer supports and leans on.

The beneficial effects of the utility model reside in that:

the utility model provides a buffer device, this buffer device mainly includes the elastic component. This elastic component includes a plurality of elasticity core, and elasticity core extends in the second direction, and elasticity core is compressible in the first direction, and along the third direction, elasticity core sets up to a plurality ofly, and two adjacent elasticity cores equally spaced sets up. Therefore, when the electric core monomer generates thermal expansion, the elastic core is extruded by the electric core monomer to deform, and then the expansion force of the electric core monomer is absorbed, so that the risk of extrusion collision of the electric core monomer is avoided, and the safety performance of the electric core monomer is improved.

The utility model also provides a battery module, this battery module include above-mentioned buffer and a plurality of electric core monomer, and buffer's at least one side supports with electric core monomer and leans on. This battery module can provide certain inflation space for electric core monomer, improves battery module's security performance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

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

fig. 2 is a schematic structural diagram of a buffering device provided in an embodiment of the present invention;

fig. 3 is an exploded schematic view of a buffering device provided in an embodiment of the present invention;

fig. 4 is a first schematic structural diagram of an elastic core provided in an embodiment of the present invention;

FIG. 5 is a side view of the elastic core of FIG. 4;

fig. 6 is a schematic structural diagram ii of the elastic core provided in the embodiment of the present invention;

fig. 7 is a side view of the elastic core of fig. 6.

Reference numerals

100. A battery cell monomer; 110. a tab;

200. an elastic member; 210. a first buffer section; 220. a second buffer section; 230. an elastic core; 240. a buffer chamber;

300. a first side plate; 400. a second side plate;

500. connecting columns; 510. a through hole; 600. a positioning member.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to fig. 3, the present embodiment provides a buffer device, which is used for buffering between battery cell units 100, where at least one side surface of the buffer device abuts against the battery cell unit 100, where the side surface is a side surface of the buffer device in the thickness direction of the battery cell unit 100 in fig. 1, and when the buffer device is placed between two adjacent battery cell units 100, two side surfaces of the buffer device respectively abut against two battery cell units 100; when the buffer device is disposed between the cell unit 100 and a housing (not shown) of the module, one side of the buffer device abuts against the cell unit 100. The buffering means mainly includes an elastic member 200. The elastic member 200 includes a plurality of elastic cores 230, the elastic cores 230 extend in the second direction, the elastic cores 230 are compressible in the first direction, and along the third direction, the elastic cores 230 are disposed in a plurality, and two adjacent elastic cores 230 are disposed at equal intervals. Thus, when the electric core monomer 100 undergoes thermal expansion, the elastic core 230 is extruded by the electric core monomer 100 to deform, so that the expansion force of the electric core monomer 100 is absorbed, and the risk of extrusion collision of the electric core monomer 100 is avoided, thereby improving the safety performance of the electric core monomer 100. The two adjacent elastic cores 230 are arranged at equal intervals, so that when the battery cell unit 100 expands, the buffer device can be stressed uniformly, that is, the expansion force can be transmitted to the elastic member 200 uniformly. It should be noted that the first direction is the X-axis direction in fig. 3, i.e. the thickness direction of the damping device; the second direction is the Y-axis direction in fig. 3, i.e. the length direction of the buffer device; the third direction is the Z-axis direction in fig. 3, i.e., the width direction of the buffer device.

Further, as shown in fig. 4 to 5, in the present embodiment, the projected area of the elastic core 230 in the second direction is S1, the product of the length of the elastic core 230 in the first direction and the length of the elastic core 230 in the third direction is S2, the ratio of S1 to S2 is K, and the value of K is in the range of 0 to 0.7, specifically, K may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 or any value therebetween; as shown in fig. 5, S1 is the area of the solid structure of the side view of the elastic core 230 in fig. 5, and the first direction and the third direction are the X-axis direction and the Z-axis direction in fig. 5, respectively. K may represent the compressibility of the elastic core 230, and it is understood that the larger the value of K, the closer the elastic core 230 is to being solid, and the smaller the theoretical compressibility, and when the cell unit 100 expands, the better compression effect cannot be achieved. When the value range of K is greater than 0.7, according to the foregoing principle, the area of S2 is too small, which may reduce the compression amount and deformation amount of the elastic core 230 under the same pressure, and may further cause the elastic core 230 not to absorb the expansion force of the battery cell unit 100, thereby affecting the normal use of the battery cell unit 100. Therefore, in this embodiment, the value range of K is set to be between 0 and 0.7, which can increase the compression amount of the elastic core 230 under the same pressure, and improve the effect of the elastic core 230 absorbing the expansion force of the battery cell unit 100.

With continued reference to fig. 5, the elastic core 230 in the embodiment includes a first buffer portion 210 and a second buffer portion 220, the first buffer portion 210 and the second buffer portion 220 are symmetrically disposed about a third direction (i.e., a Z-axis direction) in fig. 5, and the first buffer portion 210 and the second buffer portion 220 can be enclosed to form a buffer chamber 240, which is due to the arrangement of the buffer chamber 240, so that when the first buffer portion 210 and the second buffer portion 220 receive an expansion force of the battery cell 100, the first buffer portion 210 and the second buffer portion 220 can approach each other, and further absorb the expansion force of the battery cell 100. In fig. 4 to 5, the cross section of the first cushioning portion 210 in the plane of the first direction and the third direction (i.e., in the XZ plane), the cross section of the second cushioning portion 220 in the plane of the first direction and the third direction (i.e., in the XZ plane) are both wavy, and in fig. 6 to 7, the cross section of the first cushioning portion 210 in the plane of the first direction and the third direction (i.e., in the XZ plane), and the cross section of the second cushioning portion 220 in the plane of the first direction and the third direction (i.e., in the XZ plane) are both zigzag. Of course, the worker may also set the first buffer portion 210 and the second buffer portion 220 to have other shapes, which is not further limited in this embodiment.

Alternatively, the first buffer portion 210 and the second buffer portion 220 may be formed by integral molding or may be formed by welding connection.

Alternatively, the resilient core 230 is made of a rigid plastic or sheet metal. The hard plastic can be phenolic plastic, polyurethane plastic, epoxy plastic and the like, and the metal material can be aluminum alloy or copper alloy and the like. Specifically, when the elastic core 230 is made of hard plastic, the corresponding first buffer portion 210 and the second buffer portion 220 are injection molded in an integral manner; when the elastic core 230 is made of a metal material, the corresponding first buffer portion 210 and the second buffer portion 220 are connected by welding. Of course, the operator may also use other connection methods to connect the first buffer portion 210 and the second buffer portion 220, which is not described herein again.

As shown in fig. 3, in the present embodiment, the buffering device includes a first side plate 300 and a second side plate 400, the first side plate 300 and the second side plate 400 are respectively disposed on two sides of the elastic core 230 along the first direction, and both the first side plate 300 and the second side plate 400 abut against the elastic core 230. The first side plate 300 and the second side plate 400 are made of plastic or metal. The first side plate 300 and the second side plate 400 are arranged to protect the elastic member 200, and meanwhile, the first side plate 300 and the second side plate 400 are planar structures, so that the contact area between the battery cell unit 100 and the buffer device can be increased, and the expansion force of the battery cell unit 100 is further transmitted when thermal expansion occurs.

With reference to fig. 3, the damping device of the present embodiment further includes a connection column 500, the connection column 500 is disposed between the first side plate 300 and the second side plate 400, and the connection column 500 abuts against the end surface of the elastic core 230. The connection column 500 is provided to improve the connection stability and reliability of the first side plate 300 and the second side plate 400. Specifically, the connecting column 500 can be made of a silicone material, and the connecting column 500 is connected with the first side plate 300 and the second side plate 400 in an adhesive manner.

Further, referring to fig. 3, the buffering device includes a positioning element 600, a through hole 510 is formed on the connecting column 500, one end of the positioning element 600 penetrates through the through hole 510, and the other end is inserted into the elastic core 230. The positioning member 600 can improve the stability of the elastic core 230, and prevent the elastic core 230 from sliding down along the third direction. When the elastic cores 230 are provided in plurality, the positioning member 600 can ensure that the distance between two adjacent elastic cores 230 is kept constant, thereby improving the stability and reliability of the buffering device.

Further, as shown in fig. 3, in the present embodiment, the length of the elastic core 230 in the second direction is smaller than that of the first side plate 300, thereby facilitating the installation of the connection column 500. Preferably, two connection columns 500 are provided in the present embodiment, and the two connection columns 500 are respectively provided at both ends of the elastic core 230 in the second direction. In the second direction, the length between the two connecting columns 500 and the length of the elastic core 230 is equal to the length of the first side plate 300 in the second direction.

As shown in fig. 1, this embodiment further provides a battery module, where the battery module includes the above-mentioned buffer device and a plurality of battery cells 100, and at least one side of the buffer device abuts against the battery cells 100. In addition, the battery module further includes a tab 110, and the tab 110 is connected to the battery cell 100. Because the battery module is provided with the buffer device in the embodiment, the battery module can provide a certain expansion space for the battery cell unit 100, and the safety performance of the battery module is improved.

It is to be understood that the foregoing is only illustrative of the presently preferred embodiments of the invention and that the invention may be practiced using other techniques. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

It is noted that in the description herein, references to the description of "some embodiments," "other embodiments," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A buffer device for buffering between battery cell units, at least one side of the buffer device is abutted against the battery cell units, and the buffer device is characterized by comprising:

an elastic member including a plurality of elastic cores extending in a second direction,

the resilient core is compressible in a first direction.

2. The impact-attenuating device of claim 1, wherein a projected area of the elastic core in the second direction is S1, a product of a length of the elastic core in the first direction and a length of the elastic core in a third direction is S2, a ratio of S1 to S2 is K, and K is between 0 and 0.7.

3. The cushioning device of claim 2, wherein the elastic core comprises a first cushioning portion and a second cushioning portion, and a cross section of the first cushioning portion in a plane in which the first direction and the third direction are located and a cross section of the second cushioning portion in a plane in which the first direction and the third direction are located are both wavy or both dog-leg shaped.

4. A fender according to claim 3 wherein the first fender and the second fender are integrally formed or welded together.

5. A fender according to claim 3 wherein the resilient core is formed from a rigid plastics material or sheet metal.

6. The cushioning device of claim 1, comprising a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively disposed on two sides of the elastic core along the first direction, and both the first side plate and the second side plate abut against the elastic core.

7. The cushioning device of claim 6, comprising a connecting post disposed between the first side plate and the second side plate, the connecting post abutting against an end surface of the resilient core.

8. The buffer device as claimed in claim 7, wherein the buffer device comprises a positioning member, the connecting column is provided with a through hole, one end of the positioning member is inserted into the through hole, and the other end of the positioning member is inserted into the elastic core.

9. The cushioning device of claim 1, wherein, in the third direction, the plurality of elastic cores are arranged, and two adjacent elastic cores are arranged at equal intervals.

10. The cushioning device of claim 6, wherein a length of the resilient core is less than a length of the first side plate in the second direction.

11. The cushioning device of claim 6, wherein the first side plate and the second side plate are both made of plastic or metal.

12. A battery module, characterized in that the battery module comprises a plurality of buffer devices of any one of claims 1 to 11, a plurality of battery cells, and at least one side surface of the buffer device abuts against the battery cells.