CN217589285U

CN217589285U - End plate assembly and battery module

Info

Publication number: CN217589285U
Application number: CN202123384267.XU
Authority: CN
Inventors: 张辉; 鲁聪; 邓雪峰; 徐兆爽; 陈朝海
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-10-14
Anticipated expiration: 2031-12-30

Abstract

The utility model belongs to the technical field of the battery, a end plate subassembly and battery module is disclosed, end plate subassembly includes end plate and elastomer. The end plate is provided with the chamber that holds that extends along its length direction, and the end plate top is provided with first opening, and first opening intercommunication holds the chamber and the end plate outside, and the end plate can elastic deformation. The elastomer can insert through first opening and hold the chamber, and with the chamber wall laminating that holds the chamber. The utility model discloses a set up on the end plate and hold the chamber to set up the elastic component holding the intracavity, thereby make end plate subassembly can take place elastic deformation, can effectively solve in battery module assembling process because the problem of the battery module assembly difficulty that the assembly error of electric core or other parts of battery module leads to, and avoid in the battery module use because electric core takes place the problem that the inflation is out of shape when being extruded and lead to electric core to damage, have apparent application effect.

Description

End plate assembly and battery module

Technical Field

The utility model relates to a battery technology field especially relates to an end plate subassembly and battery module.

Background

The end plate assembly of battery module adopts extrusion integrated into one piece or casting integrated into one piece usually, and this end plate assembly will produce very big bulging force when electric core inflation, produces the minus effect to the capacity and the electrical property of electric core, and to end plate assembly self rigidity, intensity and with the joint strength requirement of other part junctions of battery module higher. Moreover, in the assembly process of the battery module, the assembly is difficult due to the tolerance of the battery core or the tolerances of other components of the battery and the assembly error.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an end plate subassembly and battery module solve because the battery module assembly difficulty that the assembly error of electric core or other parts of battery module lead to absorb the expansion deformation in the electric core use, be extruded when avoiding electric core to take place expansion deformation and lead to electric core to damage.

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

an end plate assembly comprising:

the end plate is provided with an accommodating cavity extending along the length direction of the end plate, the top end of the end plate is provided with a first opening, the first opening is communicated with the accommodating cavity and the outer side of the end plate, and the end plate can elastically deform;

the elastic body can be inserted into the accommodating cavity through the first opening and is attached to the cavity wall of the accommodating cavity.

Preferably, one of the cavity wall of the accommodating cavity and the elastic body is provided with a guide boss extending along the height direction of the end plate, and the other is provided with a guide groove matched with the guide boss.

Preferably, the guide boss is arranged on the wall of the accommodating cavity.

Preferably, the guide bosses are provided with a plurality of guide grooves which are arranged at intervals along the circumferential direction of the guide grooves, and the guide grooves and the guide bosses are arranged in one-to-one correspondence.

Preferably, a second opening is arranged at a position of the bottom end of the end plate corresponding to the first opening, and the second opening is the same as the first opening in shape.

Preferably, the end plate includes:

a first support plate extending in a length direction of the end plate;

the second backup pad, it set up in one side that electric core was kept away from to first backup pad, the second backup pad is followed end plate length direction's both ends to the direction of first backup pad is buckled, and with first backup pad links firmly, first backup pad with the second backup pad encloses to establish and forms hold the chamber.

Preferably, the end plate further comprises an ear plate, the ear plate is fixedly arranged on one side, away from the first supporting plate, of the second supporting plate, and a mounting hole is formed in the ear plate.

Preferably, the battery further comprises a connecting piece, a threaded hole is formed in one side, away from the battery cell, of the end plate, a connecting hole corresponding to the threaded hole is formed in the elastic body, and the connecting piece penetrates through the threaded hole and is inserted into the connecting hole.

Preferably, the number of the threaded holes is four, the four threaded holes are arranged in a rectangular shape, and the connecting pieces are arranged in one-to-one correspondence with the threaded holes.

A battery module comprising the end plate assembly of any of the above.

The utility model has the advantages that:

(1) The utility model provides an end plate subassembly and battery module, end plate subassembly include end plate and elastomer. The end plate is provided with the chamber that holds that extends along its length direction, and the end plate top is provided with first opening, and first opening intercommunication holds the chamber and the end plate outside, and the end plate can elastic deformation. The elastomer can insert through first opening and hold the chamber, and with the chamber wall laminating that holds the chamber, elastic deformation can take place for the end plate subassembly in the aforesaid setting to the realization can effectively be solved because the tolerance of electric core or other parts of battery module and the problem of the battery module assembly difficulty that assembly error leads to through end plate subassembly's elastic deformation in battery module assembling process. Realize simultaneously in the use of battery module, the end plate subassembly can absorb the dilatational strain of electric core through its elastic deformation, is extruded and leads to electric core to damage when avoiding electric core to take place dilatational strain, has also reduced the requirement to end plate module and other part joint strength of battery module simultaneously.

(2) For the end plate of same thickness, the utility model discloses an end plate can realize subtracting heavy requirement, reaches the lightweight design.

Drawings

Fig. 1 is an exploded view of an end plate assembly provided by an embodiment of the present invention;

fig. 2 is a partial structural schematic view of an end plate assembly according to an embodiment of the present invention;

fig. 3 is a schematic partial structural diagram of an end plate assembly according to an embodiment of the present invention.

In the figure:

1. an end plate; 11. an accommodating chamber; 12. a threaded hole; 13. a first support plate; 14. a second support plate; 15. an ear plate; 151. mounting holes;

2. an elastomer; 21. connecting holes;

3. a guide boss;

4. a guide groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

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 in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, 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 3, the present embodiment provides an end plate assembly for a battery module, including an end plate 1 and an elastic body 2. End plate 1 is provided with the chamber 11 that holds that extends along its length direction, and end plate 1 top is provided with first opening, and first opening intercommunication holds the chamber 11 and the end plate 1 outside, and end plate 1 can elastic deformation. The elastic body 2 can be inserted into the accommodating cavity 11 through the first opening and attached to the cavity wall of the accommodating cavity 11.

The end plate assembly that this embodiment provided holds chamber 11 through setting up on end plate 1 to set up elastic component 2 in holding chamber 11, thereby make end plate assembly elastic deformation can take place, thereby realize in battery module assembling process, the elastic deformation through end plate assembly can effectively solve the problem of the battery module assembly difficulty that leads to because the assembly error of electric core or other parts of battery module. Realize simultaneously in the use of battery module, the end plate subassembly can absorb the dilatational strain of electric core through its elastic deformation, is extruded and leads to electric core to damage when avoiding electric core to take place dilatational strain, has also reduced the requirement to the joint strength of end plate module and other part junction of battery module simultaneously.

Specifically, in the present embodiment, the elastic body 2 is rubber. In another embodiment, the elastic body 2 may also be foam or spring, and the specific selection of the elastic body may be determined according to the type of the battery cell and then by the magnitude of the expansion force of the battery cell and the maximum displacement allowed by the module. In other embodiments, the materials and manufacturing methods of the end plate 1 and the elastic body 2 can be selected according to the needs.

Alternatively, as shown in fig. 1 to 3, one of the cavity wall of the accommodating cavity 11 and the elastic body 2 is provided with a guide boss 3 extending in the height direction of the end plate 1, and the other is provided with a guide groove 4 matching with the guide boss 3. The elastic body 2 can be easily inserted into the accommodating cavity 11 by providing the guide boss 3 and the guide groove 4.

Alternatively, as shown in fig. 2, the guide boss 3 is provided on the wall of the accommodation chamber 11. The hardness of the material used by the end plate 1 is greater than that of the material used by the elastic element 2, so that the guide boss 3 is arranged on the cavity wall of the accommodating cavity 11 of the end plate 1, and the guide boss 3 is prevented from deforming and losing the guide effect in the process of inserting the elastic element 2 into the accommodating cavity 11.

Alternatively, as shown in fig. 2, the guide bosses 3 are provided in plurality, the guide bosses 3 are arranged at intervals along the circumferential direction of the accommodating cavity 11, and the guide grooves 4 are arranged in one-to-one correspondence with the guide bosses 3. The plurality of guide bosses 3 can further enhance the guiding function of the elastic body 2. Specifically, in the present embodiment, four guide bosses 3 are provided.

Optionally, a second opening is provided at a position of the bottom end of the end plate 1 corresponding to the first opening, and the second opening has the same shape as the first opening. Through set up the second opening that corresponds and shape is the same with first open position in end plate 1 bottom, both ends atress structure is the same about messenger end plate 1, avoids setting up a first opening alone and influences the load structure of end plate 1, makes the atress between end plate 1 and the electric core even.

Alternatively, as shown in fig. 2, the end plate 1 comprises a first support plate 13 and a second support plate 14. The first support plate 13 extends in the length direction of the end plate 1. Second backup pad 14 sets up in one side that electric core was kept away from to first backup pad 13, and second backup pad 14 is buckled to first backup pad 13's direction along the both ends of end plate 1 length direction, and links firmly with first backup pad 13, and first backup pad 13 and second backup pad 14 enclose to establish and form and hold chamber 11. During use of the end plate assembly, the elastic deformation of the end plate 1 is achieved by the first support plate 13 approaching and moving away from the second support plate 14. Meanwhile, the second support plate 14 generally needs to be connected with other accessories, the battery cell expansion has a small influence on the second support plate 14 due to the arrangement, and the deformation of the second support plate 14 is also small, so that the influence on the second support plate 14 due to the battery cell expansion can be avoided, and further the influence on other accessories can be avoided.

In addition, because the trend of battery cell inflation shows that the middle part is bloated mostly, the design of first backup pad 13 and second backup pad 14 can be suitable for the trend of battery cell inflation, makes the atress between end plate 1 and the battery cell even, avoids the extrusion force between the battery cell middle part too big, and the extrusion force undersize of both sides leads to the deformation of battery cell.

Alternatively, as shown in fig. 2, the first supporting plate 13 and the second supporting plate 14 of the present embodiment are integrally formed, and may also be connected by other manners, such as screwing, welding, and the like.

Optionally, as shown in fig. 1 and fig. 2, the end plate 1 further includes an ear plate 15, the ear plate 15 is fixedly disposed on a side of the second support plate 14 away from the first support plate 13, and the ear plate 15 is provided with a mounting hole 151. The mounting holes 151 are used to connect the end plates 1 with other members of the battery module.

Optionally, the end plate assembly provided by the present embodiment further includes a connector, as shown in fig. 1 and fig. 2, a threaded hole 12 is provided on a side of the end plate 1 away from the battery cell, a connection hole 21 corresponding to the threaded hole 12 is provided on the elastic body 2, and the connector is inserted into the connection hole 21 through the threaded hole 12. The connecting piece penetrates through the threaded hole 12 and is inserted into the connecting hole 21 to connect the end plate 1 and the elastic body 2, so that the elastic body 2 and the end plate 1 are prevented from moving relatively in the use process of the battery module.

Alternatively, as shown in fig. 1 and 2, four threaded holes 12 are provided, and the four threaded holes 12 are in a rectangular configuration. By providing four rectangular threaded holes 12, the elastic body 2 can be firmly fixed to the end plate 1

The embodiment also provides a battery module, which comprises the end plate assembly.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An end plate assembly, comprising:

the end plate (1) is provided with an accommodating cavity (11) extending along the length direction of the end plate, a first opening is formed in the top end of the end plate (1), the accommodating cavity (11) is communicated with the outer side of the end plate (1), and the end plate (1) can elastically deform;

the elastic body (2) can be inserted into the accommodating cavity (11) through the first opening and is attached to the cavity wall of the accommodating cavity (11).

2. The end plate assembly according to claim 1, wherein one of the cavity wall of the receiving cavity (11) and the elastic body (2) is provided with a guide boss (3) extending in the height direction of the end plate (1), and the other is provided with a guide groove (4) matching with the guide boss (3).

3. End plate assembly according to claim 2, wherein the guide boss (3) is provided on a wall of the receiving cavity (11).

4. The end plate assembly according to claim 3, wherein the guide bosses (3) are provided in plurality, the guide bosses (3) are arranged at intervals along the circumferential direction of the accommodating cavity (11), and the guide grooves (4) are arranged in one-to-one correspondence with the guide bosses (3).

5. The end plate assembly according to claim 1, characterized in that the bottom end of the end plate (1) is provided with a second opening in a position corresponding to the first opening, the second opening being of the same shape as the first opening.

6. The end plate assembly according to claim 1, characterized in that the end plate (1) comprises:

a first support plate (13) extending in a longitudinal direction of the end plate (1);

second backup pad (14), it set up in one side of electric core is kept away from in first backup pad (13), second backup pad (14) are followed end plate (1) length direction's both ends to the direction of first backup pad (13) is buckled, and with first backup pad (13) link firmly, first backup pad (13) with second backup pad (14) enclose establish and form hold chamber (11).

7. The end plate assembly according to claim 6, wherein the end plate (1) further comprises an ear plate (15), the ear plate (15) is fixedly arranged on the side of the second support plate (14) away from the first support plate (13), and the ear plate (15) is provided with a mounting hole (151).

8. The end plate assembly according to claim 7, further comprising a connector, wherein a threaded hole (12) is formed in one side of the end plate (1) away from the battery cell, a connecting hole (21) corresponding to the threaded hole (12) is formed in the elastic body (2), and the connector is inserted into the connecting hole (21) through the threaded hole (12).

9. The end plate assembly according to claim 8, wherein there are four threaded holes (12), four of the threaded holes (12) being in a rectangular configuration, and the connectors being arranged in one-to-one correspondence with the threaded holes (12).

10. A battery module comprising the end plate assembly according to any one of claims 1 to 9.