CN218602673U

CN218602673U - A division board for battery module and battery module thereof

Info

Publication number: CN218602673U
Application number: CN202222282415.5U
Authority: CN
Inventors: 李爽; 陈英旗; 曹楷
Original assignee: Shanghai Ruipu Energy Co Ltd
Current assignee: Shanghai Ruipu Energy Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-03-10
Anticipated expiration: 2032-08-29

Abstract

The utility model provides a separator for a battery module and a battery module thereof, which comprises one or more batteries arranged in sequence and a separator arranged above the batteries; each battery is provided with an explosion-proof valve, and the partition plate comprises a body, a plurality of exhaust channels which are arranged on the body and correspond to the explosion-proof valves, and a plurality of sealing grooves which are positioned on the body and are arranged along the circumferential direction of the exhaust channels; the sealing groove is provided with a sealing element, so that the gas out of the explosion-proof valve only can flow out through the exhaust channel. The utility model discloses a design seal groove and match the shutoff that the sealing member realized clearance between division board and battery and found exhaust passage guide thermal runaway discharge to discharge on the division board, improved the sealed reliability of battery module exhaust passage, optimized the safety design of battery module, occupation space is little, is favorable to the miniaturized development of battery module.

Description

A division board for battery module and battery module thereof

Technical Field

The utility model relates to a lithium cell processing technology field specifically relates to a division board and battery module for battery module.

Background

With the development of science and technology, the energy density of batteries is higher and higher, and the safety requirements on batteries and module systems are also higher and higher. And because the gas generated by the battery has higher pressure and higher temperature, the sealing design of the whole exhaust channel is more severely required.

Be provided with exhaust passage among the present part battery module, the high temperature high pressure gas who produces after opening the explosion-proof valve discharges and keeps away from the battery, prevents that the battery from producing more serious out of control phenomenon, but solitary exhaust passage accounts for the space big, is unfavorable for the miniaturized development of battery module.

Patent document CN205542990U discloses a battery module harmful gas keeps apart emission structure, including the battery box, battery module, bunch board, blast pipe and sealed piece, the battery module is installed in the battery box, sealed piece will through post forming the blast pipe links into an organic whole with bunch board structure, but this design is unfavorable for the miniaturization of battery owing to increase blast pipe and sealed piece, and structural design is unreasonable.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a division board and battery module for battery module.

According to the utility model provides a division board for battery module, the division board is arranged above one or more batteries that arrange in proper order, is provided with explosion-proof valve on each said battery, the division board includes the body, arrange on said body and a plurality of exhaust passage corresponding to a plurality of explosion-proof valves and lie in said body and along a plurality of seal grooves of said exhaust passage circumference arrangement; the sealing groove is internally provided with a sealing element, so that the gas from the explosion-proof valve only can flow out through the exhaust channel.

Preferably, the sealing element is made of silica gel, silicone rubber or sealant.

Preferably, the exhaust passage is a circular hole, an elliptical hole, or an oblong hole.

Preferably, the size of the exhaust passage is the same as that of the explosion-proof valve, or the size of the exhaust passage is larger than that of the explosion-proof valve.

Preferably, the sealing groove is a structure formed by a concave surface of the body facing the battery, or the sealing groove is a groove-shaped structure formed by two ribs which are protruded from one surface of the body facing the battery and are arranged in parallel.

Preferably, the end of the vent passage extends outside the face of the body facing away from the cell.

Preferably, the isolation plate is of an integrally formed structure.

Preferably, a plurality of the exhaust passages are uniformly arranged on the body.

According to the utility model provides a pair of battery module, include the division board for battery module, still include battery (1), two at least end plates and two at least curb plates that one or more arranged in proper order

At least two end plates for fixing the front and rear sides of one or more of the cells;

the at least two side plates are used for fixing the left side and the right side of one or more batteries and are connected with the end plates to form a module frame;

the partition plate is disposed at an upper portion of the module frame.

Preferably, every two adjacent cells are connected by a connecting tab.

Preferably, the isolation plate is provided with a plurality of through holes, and the positive electrode and the negative electrode on the battery are exposed through the through holes and connected through the connecting sheet.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a design seal groove and match the shutoff that the sealing member realized clearance between division board and battery and found exhaust passage guide thermal runaway discharge to discharge on the division board, improved the sealed reliability of battery module exhaust passage, optimized the safety design of battery module, occupation space is little, is favorable to the miniaturized development of battery module.

2. The utility model discloses in the structure that relates to need not change other spare parts in the battery module basically, simple structure, maneuverability is strong.

3. The utility model discloses in through design seal groove and sealing member, simple to operate has improved assembly efficiency.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a battery module according to the present invention;

fig. 2 is an exploded view of the battery module according to the present invention;

fig. 3 is the structure diagram of the exhaust passage, the sealing groove and the sealing element of the present invention.

The figures show that:

battery 1

Explosion-proof valve 11

End plate 2

Side plate 3

Partition plate 4

Body 41

Exhaust passage 42

Seal groove 43

Through hole 44

Sealing element 5

Connecting sheet 6

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

In a possible implementation mode, the utility model provides an division board for battery module, as shown in fig. 1, fig. 2, fig. 3 shows, including one or more battery 1 that arrange in proper order and arrange division board 4 in battery 1 top, be provided with explosion-proof valve 11 on every battery 1, when the battery in the battery module takes place the short circuit or overcharges, when the circumstances such as overdischarge, can form huge high temperature high pressure in the battery box, the thermal runaway phenomenon appears, the electric core of battery can produce a large amount of harmful gas, thermal runaway promptly, the inside atmospheric pressure of battery module rises, finally burst explosion-proof valve 11, thermal runaway follow explosion-proof valve 11 discharges, explosion-proof valve 11 can adopt the structure among the prior art, no longer give unnecessary details here.

The partition plate 4 includes a body 41, a plurality of exhaust passages 42 arranged on the body 41 and corresponding to the plurality of explosion-proof valves 11, and a plurality of seal grooves 43 located on the body 41 and arranged in the circumferential direction of the exhaust passages 42, and a seal 5 is provided in the seal grooves 43 such that the gas coming out of the explosion-proof valves 11 is allowed to flow out only through the exhaust passages 42.

In a possible embodiment, the sealing groove 43 is formed by recessing the body 41 in a plane facing the battery 1, in this embodiment, the sealing groove 43 is formed by recessing a plane facing the battery of the body of the separator 4, one side of the sealing member 5 can be filled in the sealing groove 43, and the other side extends to the outside of the sealing groove 43, and when the separator body 41 is pressed against the battery 1, the sealing member 5 is pressed to be in sealing fit with the battery 1, so that the gap between the separator 4 and the battery 1 can be greatly reduced, the structure is more compact, and the sealing effect can be enhanced. In other possible embodiments, the sealing groove 43 may also be a groove-shaped structure formed by two ribs arranged in parallel protruding from one surface of the body 41 facing the battery 1, and may also achieve a sealing effect.

In practical applications, the sealing member 5 may be an O-ring, for example, with one side located in the sealing groove 43 and the other side extending to the outside of the sealing groove 43, so that when the body 41 is pressed close to the top of the cell 1, the gap between the body 41 and the top surface of the cell 1 is blocked, thereby achieving a sealing effect. In other possible embodiments, the sealing element 5 may also be a sealing compound applied in the sealing groove 43, which also achieves a sealing effect.

The utility model discloses an arrange seal groove 43 along exhaust passage 42 circumference on the body 41 of division board 4 to through set up sealing member 5 in seal groove 43, make the gas that explosion-proof valve 11 came out only allow to flow through exhaust passage 42, guarantee the sealed reliability of division board exhaust passage, and then ensure that the gas that battery explosion-proof valve 11 opened the back and produced flows according to the passageway of design.

The embodiment of the utility model provides a do not do the restriction to exhaust passage's specific shape, for example, exhaust passage 42 can be round hole, elliptical aperture or oblong hole, also can adopt other shapes, should rationally design according to the demand of the product of reality. In a possible embodiment, the shape of the vent passage 42 corresponds to the shape of the explosion-proof valve 11 on the battery 1, for example, if the shape of the explosion-proof valve 11 on the battery 1 is a racetrack shape, then the shape of the vent passage 42 is also a racetrack shape, and the size of the vent passage 42 corresponds to the size of the explosion-proof valve 11, or the size of the vent passage 42 is larger than the size of the explosion-proof valve 11.

In practical applications, the separator 4 is preferably of an integrally formed structure, and a plurality of exhaust channels 42 are uniformly arranged on the body 41, and the ends of the exhaust channels 42 extend to the outside of the surface of the body 41 facing away from the battery 1 to form a surrounding structure through which the cell exhaust is discharged.

In the embodiment of the application, the integrally formed isolation plate 4 is adopted, so that the convenience of manufacturing and assembling is enhanced; in addition, by extending the end of the exhaust channel 42 outside the side of the body 41 facing away from the cell 1, it is facilitated to direct thermal runaway exhaust to the outside of the upper cover, which is not shown in fig. 2, compared to the end of the exhaust channel 42 being flush with or lower than the body of the separator 4.

The utility model also provides a battery module, which comprises a separation plate for the battery module, one or more batteries 1, at least two end plates 2 and at least two side plates 3 which are arranged in sequence, wherein the at least two end plates 2 are used for fixing the front side and the rear side of the one or more batteries 1; at least two curb plates 3 are used for the left and right sides of fixed one or more battery 1, and curb plate 3 is connected with end plate 2 and forms the module frame, and the module frame can adopt the ribbon to bundle together, also can adopt welded form to make end plate 2 and curb plate 3 link to each other, still can adopt

end plate

2 and 3 joint modes of curb plate to connect.

The division board 4 is arranged on the upper portion of the module frame, every two adjacent batteries 1 are connected through the connecting sheet 6, a plurality of through holes 44 are formed in the division board 4, and the positive and negative electrodes on the batteries 1 are leaked through the through holes 44 and connected through the connecting sheet 6, so that the whole battery module is more compact and simpler in structure.

The utility model discloses a design seal groove 43 and match sealing member 5 and realize that the shutoff in clearance between division board 4 and battery 1 constructs exhaust passage 42 and guides the discharge of thermal runaway discharge on division board 4, has improved the sealed reliability of battery module exhaust passage, has optimized the safety design of battery module, and occupation space is little, is favorable to the miniaturized development of battery module.

For convenience of understanding, in the embodiment of the present application, the battery module in fig. 2 includes 6 batteries as an example for description, but the structure of the battery module in the embodiment of the present application is not limited thereto, and other structures may also be adopted, for example, the battery module includes 8 batteries, and further, for example, the battery module may be a double-row battery structure, and the like.

In one possible embodiment, the battery module comprises two end plates 2 and two side plates 3, wherein the end plates 2 and the side plates 3 are fixedly connected to form a module frame; the battery pack comprises six batteries 1, wherein the batteries 1 are connected in series through connecting sheets 6 to form a battery pack; the battery explosion-proof valve comprises a separation plate 4, wherein six exhaust channels 42 are arranged on the separation plate 4, the exhaust channels 42 are positioned above the battery explosion-proof valve 11 and guide the high-temperature and high-pressure gas generated after the explosion-proof valve 11 is opened to flow; six sealing grooves 43 are also arranged on the isolation plate 4; contain six sealing members 5, sealing members 5 are formed by silica gel or silicon rubber processing, through the clearance between compression deformation shutoff division board and the battery, guarantee the sealed effect between explosion-proof valve 11 and exhaust passage 42.

The structure that sealing member 5 adopted silica gel or silicon rubber to make is installed and is dismantled conveniently, need adopt with seal groove 43 assorted sealing member 5 in order to reach the sealed requirement of matching.

In another possible embodiment, the battery module comprises two end plates 2 and two side plates 3, wherein the end plates 2 and the side plates 3 are fixedly connected to form a module frame; the battery pack comprises six batteries 1, wherein the batteries 1 are connected in series through connecting sheets 6 to form the battery pack; the battery explosion-proof valve comprises a separation plate 4, wherein six exhaust channels 42 are arranged on the separation plate 4, the exhaust channels 42 are positioned above the battery explosion-proof valve 11 and guide the high-temperature and high-pressure gas generated after the explosion-proof valve 11 is opened to flow; six sealing grooves 43 are also arranged on the isolation plate 4; the six sealing elements 5 are included, the sealing elements 5 are formed by sealing glue, and the sealing glue is used for bonding the isolation plate 4 and the battery 1 to ensure the sealing effect between the explosion-proof valve 11 and the exhaust channel 42.

The sealing element 5 adopts the sealing glue without considering the size and the shape of the sealing groove 43, and the adaptability of the sealing glue is stronger.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A separator for a battery module, characterized in that,

the separator (4) is arranged above one or more batteries (1) which are arranged in sequence, each battery (1) is provided with an explosion-proof valve (11), and the separator (4) comprises a body (41), a plurality of exhaust channels (42) which are arranged on the body (41) and correspond to the explosion-proof valves (11), and a plurality of sealing grooves (43) which are positioned on the body (41) and are arranged along the circumferential direction of the exhaust channels (42); a sealing element (5) is arranged in the sealing groove (43) so that gas out of the explosion-proof valve (11) only can flow out through the exhaust channel (42).

2. The separator for battery modules according to claim 1, wherein the sealing member (5) is made of silicone rubber, silicon rubber, or sealant.

3. The separator for battery modules according to claim 1, wherein the sealing groove (43) is a structure in which the body (41) is formed to be concave toward one surface of the battery (1), or the sealing groove (43) is a groove-like structure formed by two ribs that are protruded toward one surface of the battery (1) from the body (41) and are arranged in parallel.

4. The separator for battery modules according to claim 1, wherein the end of the vent channel (42) extends outside the face of the body (41) facing away from the battery (1).

5. The separator for battery modules according to claim 1, wherein the size of the vent passage (42) coincides with the size of the explosion-proof valve (11), or the size of the vent passage (42) is larger than the size of the explosion-proof valve (11).

6. The separator for battery modules according to claim 1, wherein the separator (4) is an integrally formed structure.

7. The separator for battery modules according to claim 1, wherein a plurality of the exhaust passages (42) are uniformly arranged on the body (41).

8. A battery module comprising the separator for a battery module according to any one of claims 1 to 7, further comprising one or more batteries (1), at least two end plates (2), and at least two side plates (3) arranged in this order;

at least two end plates (2) are used for fixing the front side and the rear side of one or more batteries (1);

the at least two side plates (3) are used for fixing the left side and the right side of one or more batteries (1) and are connected with the end plates (2) to form a module frame;

the partition plate (4) is arranged at an upper portion of the module frame.

9. The battery module according to claim 8, wherein each two adjacent batteries (1) are connected by a connecting tab (6).

10. The battery module according to claim 9, wherein the separator (4) is provided with a plurality of through holes (44), and the positive electrode and the negative electrode of the battery (1) are exposed through the through holes (44) and connected through the connecting sheet (6).