CN213425082U

CN213425082U - End plate assembly and battery module

Info

Publication number: CN213425082U
Application number: CN202022649489.9U
Authority: CN
Inventors: 刘志飞; 韩廷; 王安民; 刘建
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-11
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses an end plate subassembly and battery module, this end plate subassembly include end plate, clamp plate and elastic component, have seted up the guiding hole on the end plate internal surface, are equipped with guiding pin and blind hole on the clamp plate, through the elastic module that guiding hole, guiding pin, blind hole and elastic component are constituteed, provide the buffering for the electric core group to the life of battery module has been improved.

Description

End plate assembly and battery module

Technical Field

The utility model belongs to the technical field of new forms of energy electric automobile, concretely relates to end plate subassembly and battery module.

Background

Along with the development of new energy automobile, duration and capacity requirement to the battery are higher and higher, what often adopt at present is to assemble into battery module with a plurality of electric cores or battery to improve electric automobile's duration.

The battery core group in the battery module is charged and discharged in the running process of the electric automobile, and the battery core breathes along with the battery core in the charging and discharging process, so that the size of the battery core changes, expands or contracts. In the existing structure, a common elastic patch material is adopted to buffer the size change of the electric core group, but the efficiency of the common elastic patch material is reduced under the conditions of high temperature and long-time operation, so that the buffering capacity is gradually lost.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an end plate assembly and a battery module, which are provided with an optimized end plate structure, and an elastic module is introduced into the end plate structure for assembling the battery module, so that the module has a certain pre-pressure to adapt to the size change of the battery cell set, and the elastic module does not reduce efficiency along with the change of the operating conditions, thereby solving the above-mentioned problems.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an end plate assembly, it includes:

the end plate comprises an outer surface and an inner surface which are oppositely arranged along the thickness direction of the end plate, and the inner surface is provided with a guide hole;

the pressing plate comprises a first surface and a second surface which are oppositely arranged along the thickness direction of the pressing plate, the first surface is respectively provided with a guide pin and a blind hole, and the guide pin is inserted into the guide hole;

and one end of the elastic piece is arranged in the blind hole, and the other end of the elastic piece is propped against the inner surface.

Furthermore, the number of the guide pins and the blind holes is respectively independent and is one or more than two, and the number of the guide holes and the number of the elastic pieces are respectively consistent with that of the guide pins and the blind holes.

Furthermore, the number of the guide pins and the number of the blind holes are four.

Preferably, the blind holes are uniformly distributed at the corner of the first surface.

Further, the guide pins are arranged in a display on the first surface.

Further, the guide pin is screw-fastened to the first surface.

Further, the elastic member is a spring.

The utility model provides a battery module, it includes:

the battery core group comprises a plurality of battery cores arranged side by side;

the first side plate and the second side plate are oppositely arranged and are positioned at two ends of the electric core group in the width direction;

set up relatively and be located the front end plate and the back end plate at the length direction both ends of electric core group, at least one in front end plate and the back end plate adopts like aforementioned arbitrary one the end plate assembly, in the end plate assembly, the end plate with first curb plate, second curb plate fixed connection, the laminating of the second surface of clamp plate electric core group.

Further, in the end plate assembly, the end plate is welded and fixed with the first side plate and the second side plate.

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

when the electric core group charges and discharges, electric core breathes, and the size changes, and the size change of electric core group can be cushioned to this end plate subassembly, prolongs the life-span of electric core, and this end plate subassembly can not be along with high temperature, long-time operation and take place the condition that efficiency reduces, can cushion the electric core group for a long time.

Drawings

Fig. 1 is an exploded view of an end plate assembly 1 according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of the end plate 10 of FIG. 1;

FIG. 3 is a schematic structural view of the platen 20 of FIG. 1;

fig. 4 is an exploded view of a battery module according to a preferred embodiment of the present invention;

fig. 5 is an assembled view illustrating the battery module of fig. 2.

In the figure: the electric plug comprises an end plate assembly 1, a first side plate 2, a second side plate 3 and an electric plug group 4;

end plate 10, outer surface 101, inner surface 102, guide hole 103;

the pressure plate 20, the first surface 201, the second surface 202, the blind hole 203, the guide pin 204;

an elastic member 30.

Detailed Description

The end plate assembly and the battery module provided by the present invention will be further described in detail with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "secured to," "disposed on," or "mounted to" another element, it can be directly on the other element or be indirectly on the other element. One element is said to be "connected to" another element, and it can be directly connected to the other element or be indirectly connected to the other element. In addition, attachment is generally referred to as attachment, where attachment may be by any means conventional in the art, such as "threading," "riveting," "welding," or the like.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the specification and are used in an illustrative or positional relationship based on the orientation shown in the drawings and are used for convenience in describing embodiments of the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed or operated in a particular orientation, and thus should not be construed as limiting the invention.

The embodiment discloses an end plate assembly 1, which is structurally shown in fig. 1 and comprises an end plate 10, a pressure plate 20 and an elastic piece 30. The end plate 10 is combined with the pressing plate 20, and the elastic member 20 is disposed between the end plate 10 and the pressing plate 20.

Specifically, referring to fig. 1 and fig. 2, the end plate 10 includes an outer surface 101 and an inner surface 102 that are oppositely disposed along a thickness direction thereof, wherein the inner surface 102 is provided with guide holes 103, the number of the guide holes 103 is not particularly limited, and may be one, or two, three, four, and the like, and may be adjusted as needed, in this embodiment, the number of the guide holes 103 is four, and the four guide holes are uniformly distributed on the inner surface 102 of the end plate 10 in an array. Further, referring to fig. 1 and 3, the pressure plate 20 includes a first surface 201 and a second surface 202 which are oppositely arranged along the thickness direction thereof, the first surface 201 is opposite to the outer surface 101 of the end plate 10, and the first surface 201 is provided with a guide pin 204 and a blind hole 203 respectively, wherein the guide pin 204 is inserted into the guide hole 103, the number of the guide pins is consistent with that of the guide holes 103, so as to achieve the movable limit of the pressure plate 20, the fixing manner of the guide pin 204 on the first surface 201 is not particularly limited, and can adopt a fixing manner which is conventional in the art, and in the present embodiment, the guide pin 204 is screwed on the first surface 201. The number of the blind holes 203 is not particularly limited, and may be adjusted as needed, and may be one or multiple, in this embodiment, the number of the blind holes 203 is four, and the blind holes 203 are uniformly distributed on the first surface 201, specifically, in this embodiment, the blind holes 203 are disposed at the corner portions of the first surface 201, so that the stress is uniform.

Referring to fig. 1, one end of the elastic element 30 is inserted into the blind hole 203, the other end of the elastic element abuts against the inner surface 102 of the end plate 10, the number of the elastic elements 30 is consistent with that of the blind hole 203, the elastic element 30 is located in the blind hole 203, and on one hand, the elastic element 30 can cooperate with the pressing plate 20 to compress or extend when the pressing plate 20 moves, and on the other hand, the elastic element 30 is located in the blind hole 203, so that the elastic element 30 can stably move at a limited position without falling off; the elastic member 30 is any component having a contraction and expansion function conventionally used in the art, and may be an elastic pad or a spring, and preferably, in this embodiment, the elastic member 30 is a spring.

The present embodiment further provides a battery module, as shown in fig. 4 and 5, including a battery cell pack 4, a first side plate 2, a second side plate 3, and front and rear end plates. It can be understood that the electric core group 4 is formed by stacking a plurality of electric cores in sequence, which is conventional in the art, in this embodiment, the electric core group 4 includes a length direction (L) and a width direction (W), the first side plate 2 and the second side plate 3 are oppositely disposed and located at two ends of the width direction (W) of the electric core group 4, and the front end plate and the rear end plate are oppositely disposed and located at two ends of the length direction (L) of the electric core group 4. The end plate assembly 1 can be arranged on the front end plate, can also be arranged on the rear end plate, and can also adopt the structure of the end plate assembly 1 on the front end plate and the rear end plate, and no special limitation exists, in the embodiment, the front end plate adopts the end plate assembly 1, in the structure of the battery module, the end plates 10 in the end plate assembly 1 are respectively welded and fixed with the first side plate 2 and the second side plate 3, and the second surface 202 of the pressing plate 20 is attached to the end surface of the electric core group 4.

Specifically, after the cell pack 4 is in a group, the cell pack is clamped between the first side plate 2 and the second side plate 3, the end portion of the pressing plate 20 at the cell pack 4 is placed, the second surface 202 of the pressing plate 20 is attached to the end face of the cell pack 4, the elastic element 30 is placed into the blind hole 203, the guide pin 204 is inserted into the guide hole 103, the end plate 10 is welded and fixed to the first side plate 2 and the second side plate 3, and before welding, the length of the battery module is adjusted through the conventional pressing equipment adopted in the field, so that the module has proper pre-pressure.

The pretightning force of this end plate subassembly 10 adjustable battery module, when electric core charge-discharge, electric core breathes, and its size changes, and end plate subassembly 10 can be stable cushion (compression or release) thereupon to the life of extension electric core.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An end plate assembly, comprising:

2. The end plate assembly of claim 1, wherein the number of the guide pins and the blind holes is one or more than two, and the number of the guide holes and the number of the elastic members are respectively the same as the number of the guide pins and the blind holes.

3. The end plate assembly of claim 2 wherein the number of guide pins and blind holes is four.

4. The end plate assembly of claim 3, wherein the blind holes are evenly distributed at corners of the first surface.

5. The endplate assembly according to claim 2, wherein the guide pins are in a display arrangement on the first surface.

6. The end plate assembly of claim 1 wherein said guide pin is threadably secured to said first surface.

7. The end plate assembly of claim 1 wherein the resilient member is a spring.

8. A battery module, characterized in that it includes:

the front end plate and the rear end plate are oppositely arranged and are positioned at two ends of the electric core group in the length direction, at least one of the front end plate and the rear end plate adopts the end plate assembly according to any one of claims 1 to 7, in the end plate assembly, the end plate is fixedly connected with the first side plate and the second side plate, and the second surface of the pressing plate is attached to the electric core group.

9. The battery module according to claim 8, wherein the end plates are welded to the first and second side plates in the end plate assembly.