CN112928374A

CN112928374A - End plate for battery module and battery module

Info

Publication number: CN112928374A
Application number: CN202110201504.XA
Authority: CN
Inventors: 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: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-06-08
Anticipated expiration: 2041-02-23
Also published as: CN112928374B

Abstract

The invention discloses an end plate for a battery module and the battery module. The end plate of the present invention comprises: the end plate comprises an end plate body, wherein a concave cavity is formed in the end plate body and is opened towards the outer side surface and the upper side surface of the end plate body; the paired first clamping arms extend outwards from the inner wall of the cavity along the extending direction vertical to the end plate main body and are provided with first clamping hooks at the outer ends; the connecting seat is positioned in the concave cavity, the middle section of the connecting seat along the height direction is provided with a clamping section, the paired first clamping arms are oppositely arranged on two sides of the clamping section of the connecting seat along the extending direction of the end plate main body, clamping grooves for receiving the first clamping arms are formed in two sides of the clamping section, the first clamping hooks extend out of the outer side surface of the clamping section, and the upper surface of the connecting seat is provided with positioning holes; the length of the clamping groove is smaller than the length of the first clamping arm from the root to the first clamping hook. Through the removal of connecting seat, can absorb each electric core accumulative assembly tolerance and electric core inflation displacement to the life of extension battery module.

Description

End plate for battery module and battery module

Technical Field

The embodiment of the invention relates to the field of batteries, in particular to an end plate for a battery module and the battery module.

Background

With the rapid development of electric vehicles, the requirements for energy density and safety of battery modules are higher and higher, and the trend of increasing the energy density and reducing the cost of the battery modules is the trend.

In order to improve the energy density of the battery module, a general battery module includes a plurality of battery cells, the plurality of battery cells are generally sequentially arranged in a frame of the battery module, in order to achieve electrical connection of the plurality of battery cells, a bus bar is generally adopted to be electrically connected with each battery cell, the bus bar is equivalent to a high-voltage circuit board, the bus bar is electrically connected with external electrical equipment, electrical connection of each battery cell and the external electrical equipment can be achieved, in order to facilitate electrical connection of the bus bar and the external electrical equipment, an output electrode of the bus bar is generally fixed on an end plate of the frame, and because each battery cell is arranged in the frame, an accumulated tolerance of installation between each battery cell is large, so that the output electrode of the bus bar is difficult to be fixed on a preset position of the end plate, and each battery cell generates heat and expands in the using process of the battery module, and also pushes the bus bar to shift, so that, thereby shortening the service life of the battery module.

Disclosure of Invention

An object of an embodiment of the present invention is to provide an end plate for a battery module and a battery module, which can extend the service life of the battery module.

In order to solve the above technical problems, an embodiment of the present invention provides an end plate for a battery module, including:

the end plate comprises an end plate body, wherein a concave cavity is formed in the end plate body, and the concave cavity is opened towards the outer side face and the upper side face of the end plate body;

the pair of first clamping arms extend outwards from the inner wall of the cavity along the extending direction vertical to the end plate main body, and first clamping hooks are arranged at the outer ends of the first clamping arms;

the connecting seat is positioned in the concave cavity, a clamping section is arranged in the middle section of the connecting seat along the height direction, the paired first clamping arms are oppositely arranged on two sides of the clamping section of the connecting seat along the extending direction of the end plate main body, clamping grooves for accommodating the first clamping arms are formed in two sides of the clamping section, the first clamping hooks extend beyond the outer side surface of the clamping section, and positioning holes are formed in the upper surface of the connecting seat;

the length of the clamping groove is smaller than the length of the first clamping arm from the root to the first clamping hook.

Compared with the prior art, the end plate of the embodiment of the invention comprises: the connecting seat of setting in the cavity, and mated first joint arm, the locating hole has been seted up on the connecting seat, through this locating hole, the connecting seat can be connected with the piece, two first joint arms insert in two joint grooves, thereby can prevent that the connecting seat from drawing out along the direction of height in the cavity, in addition, because the outside surface of the joint section of first pothook extension surpassing the connecting seat of first joint arm, the outside surface of joint section is hooked to first pothook, thereby can prevent that the connecting seat from outwards releasing in the cavity, and, the length in joint groove is less than the length of first joint arm from root to first pothook, consequently, the connecting seat can remove along the length direction in joint groove in the cavity. Therefore, the bars are not fixed, but have certain movement allowance, accumulated tolerance generated in the assembling process of each battery cell can be absorbed through the movement of the connecting seat, the bars are pushed to move after the battery cells expand, and the movement displacement of the bars can be absorbed through the movement of the connecting seat, so that the bars cannot be easily broken, and the service life of the battery module can be prolonged.

In an embodiment, each of the pair of first catching arms includes:

the first elastic rod extends outwards from the inner wall of the concave cavity, the outer section of the first elastic rod is separated from the inner wall of the concave cavity, the first elastic rod is slidably arranged in the corresponding clamping groove, and the length of the first elastic rod is greater than that of the clamping groove;

the first clamping hook extends from the end part of the first elastic rod to the other first clamping arm, and the first clamping hook is hooked outside the outer side surface of the connecting seat.

In one embodiment, a distance between two first elastic rods of the pair of first catching arms is greater than a distance between groove bottoms of two catching grooves.

In one embodiment, the height of the first elastic rod is smaller than the groove width of the clamping groove.

In one embodiment, the end portion of the first hook has a first guiding surface, and the first guiding surface is inclined towards the cavity from the root to the end of the first hook along a direction perpendicular to the extension direction of the end plate main body.

In one embodiment, the end plate for a battery module further includes: the pair of second clamping arms are oppositely arranged on two sides of the connecting seat along the extending direction of the end plate main body, extend outwards from the inner wall of the concave cavity and are provided with second clamping hooks at the outer ends;

the second hook is hooked on the outer side surface of the connecting seat, and the distance from the second hook to the back wall of the cavity is greater than the width of the connecting seat in the direction perpendicular to the extending direction of the end plate main body.

In an embodiment, each of the pair of second catching arms includes:

the second elastic rod extends outwards from the inner wall of the cavity along the direction perpendicular to the extending direction of the end plate main body, and the outer section of the second elastic rod is separated from the inner wall of the cavity;

and the second clamping hook extends from the end part of the second elastic rod to the other second clamping arm.

In an embodiment, along the extending direction of the end plate main body, the both sides inner wall of cavity has the part inwards sunken formation respectively and accomodates the groove in pairs, in pairs the second joint arm set up respectively in accomodate the groove in pairs, just the root of second elastic rod with accomodate the cell wall fixed connection in groove, the outer section of second elastic rod with accomodate the cell wall in groove and separate each other.

In an embodiment, the end portion of the second hook has a second guiding surface, and the second guiding surface is inclined toward the cavity along a direction perpendicular to the extending direction of the end plate main body from the root portion to the end portion of the second hook.

Meanwhile, an embodiment of the present invention provides a battery module including:

the frame body comprises the end plate for the battery module;

the battery cells are sequentially arranged in the frame along the extending direction perpendicular to the end plates;

the bus plates are electrically connected with the battery cells and provided with output electrodes, mounting holes are formed in the output electrodes, and the output electrodes are arranged on the upper surface of the connecting seat;

the fixing piece is partially positioned in the mounting hole and the positioning hole, is detachably connected with the positioning hole and is partially positioned on the upper surface of the output electrode;

the radial dimension of the other part of the fixing piece is larger than that of the mounting hole.

In addition, the fixing member includes:

the fixing rod is positioned in the mounting hole and the positioning hole and is detachably connected with the positioning hole, and the radial dimension of the fixing rod is smaller than that of the mounting hole and that of the positioning hole;

and the fixing cap is coaxially and fixedly connected with the positioning rod and is positioned on the upper surface of the output electrode, and the radial size of the fixing cap is larger than that of the mounting hole.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

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

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic structural view of an end plate in an embodiment of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is an enlarged view at C in FIG. 3;

fig. 6 is a schematic structural view of a fixing member in an embodiment of the present invention.

Description of reference numerals: 1. an end plate main body; 11. a concave cavity; 1111. a side wall; 1112. a receiving groove; 2. a first clamping arm; 21. a first hook; 22. a first elastic rod; 211. a first guide surface; 3. a connecting seat; 31. a clamping section; 32. a clamping groove; 33. positioning holes; 4. a second clamping arm; 41. a second elastic rod; 42. a second hook; 421. a second guide surface; 5. a frame body; 6. a tablet; 61. an output electrode; 611. mounting holes; 7. a fixing member; 71. fixing the rod; 72. and (4) fixing the cap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

An end plate for a battery module according to an embodiment of the present invention is described below with reference to the accompanying drawings, as shown in fig. 1 to 5, the end plate including: end plate main part 1, first joint arm 2 and connecting seat 3 in pairs, wherein, offer cavity 11 on the end plate main part 1, cavity 11 is open towards the lateral surface and the up end of end plate main part 1, and first joint arm 2 in pairs extends and is equipped with first pothook 21 at the outer end along the extending direction of perpendicular to end plate main part 1 outwards from the inner wall of cavity 11. Connecting seat 3 is located cavity 11 to middle section along direction of height has joint section 31, and is concrete, as shown in the figure, in pairs first joint arm 2 along the extending direction of perpendicular to end plate main part 1, sets up two joint section 31 both sides at connecting seat 3 relatively, and is equipped with the joint groove 32 of accepting each first joint arm 2 in joint section 31 both sides, and first pothook 21 extends beyond the outside surface of joint section 31, and locating hole 33 is seted up to the upper surface of connecting seat 3. The length of the clamping groove 32 is less than the length of the first clamping arm 2 from the root to the first clamping hook 21.

Since the end plate includes: the connecting seat 3 that sets up in cavity 11, and first joint arm 2 in pairs, locating hole 33 has been seted up on the connecting seat 3, through this locating hole 33, connecting seat 3 can be connected with piece 6, two first joint arms 2 insert in two joint grooves 32, thereby can prevent that connecting seat 3 from drawing out along the direction of height in cavity 11, in addition, because first pothook 21 of first joint arm 2 extends the outside surface that surpasss joint section 31 of connecting seat 3, first pothook 21 hooks the outside surface of joint section 31, thereby can prevent that connecting seat 3 from outwards pushing out in cavity 11, and, the length of joint groove 32 is less than first joint arm 2 from the root to the length of first pothook 21, consequently, connecting seat 3 can move along the length direction in joint groove 32 in cavity 11. Therefore, the bar piece 6 is not fixed, but has a certain movement margin, accumulated tolerance generated in the assembling process of each battery cell can be absorbed through the movement of the connecting seat 3, the battery cells are pushed to move after expanding, and the movement displacement of the bar piece 6 can be absorbed through the movement of the connecting seat 3, so that the bar piece 6 cannot be easily broken, and the service life of the battery module can be prolonged.

Specifically, as shown in fig. 4 and 5, the inner wall of the cavity 11 includes: along the extending direction of the end plate body 1, two side walls 1111 arranged oppositely, and a back wall connecting the two side walls 1111, the outer side surface of the connecting seat 3 is arranged oppositely and away from the back wall of the cavity 11. As shown in fig. 2 and 4, each of the pair of first click arms 2 includes: first elastic rod 22 and first pothook 21, wherein, first elastic rod 22 extends outwards from the inner wall of cavity 11, the outer section of first elastic rod 22 separates from the inner wall of cavity 11, first elastic rod 22 is slidably disposed in corresponding clamping groove 32, the length of first elastic rod 22 is greater than the length of clamping groove 32, first pothook 21 extends from the end of first elastic rod 22 to the direction of another first clamping arm 2, and first pothook 21 hooks outside the outer surface of connecting seat 3.

Specifically, as shown in fig. 4, in the present embodiment, the first resilient bar 22 of the first snap arm 2 is connected to both the back wall and one of the side walls 1111, and the outer section of the first snap arm 2 is spaced apart from the side wall 1111 adjacent to the first snap arm 2, but the first resilient bar 22 may be connected to only the back wall or only one of the side walls 1111 in other embodiments.

Because the length of the first elastic rod 22 is greater than that of the clamping groove 32, the connecting seat 3 can slide along the first elastic rod 22, so that accumulated tolerance generated in the assembling process of each battery cell and displacement generated after the battery cells expand can be absorbed.

As can be seen from the above description, since the two first elastic rods 22 are elastic rods, in the actual assembly process, when the connecting seat 3 needs to be assembled into the cavity 11 by a worker, the two first elastic rods 22 can be pulled outwards, and then the connecting seat 3 is clamped between the two first clamping arms 2, and when the connecting seat 3 needs to be disassembled, the connecting seat 3 can be taken out of the cavity 11 by pulling the two first elastic rods 22 outwards, so that when the connecting seat 3 is damaged, or the positioning hole 33 on the connecting seat 3 is not well opened, for example, when the positioning hole 611 on the flexible circuit board cannot be coaxially arranged, the connecting seat 3 can be replaced, thereby improving the convenience of the battery module and prolonging the service life of the battery module.

In addition, as shown in fig. 4 and 5, the distance between the two first elastic rods 22 in the pair of first snap-in arms 2 is greater than the distance between the bottoms of the two snap-in grooves 32, so that the connecting base 3 can slide in the cavity 11 along the extending direction of the end plate body 1, thereby absorbing the expansion displacement of each cell toward the extending direction of the end plate.

Furthermore, as shown in fig. 2 and 4, the height of the first elastic rod 22 is smaller than the width of the locking groove 32, so that the connecting base 3 can move in the cavity 11 along the height direction, thereby absorbing the expansion displacement of each cell along the height direction.

In addition, as shown in fig. 4, in order to facilitate the connection socket 3 to be clamped between the two first connection arms, the end of the first hook 21 has a first guiding surface 211, and the first guiding surface 211 is inclined toward the cavity 11 along a direction perpendicular to the extending direction of the end plate main body 1 from the root to the end of the first hook 21. Like this at actual assembly in-process, only need aim at two first joint arms 2 with two joint grooves 32 on connecting seat 3 and inwards promote connecting seat 3 again, through two first spigot surface 211 on two first pothooks 21, two first elastic rod 22 are automatic toward pulling open outward, and connecting seat 3 just pushes into cavity 11 to be in between two first joint arms 2, thereby improved the convenience in use of end plate.

In addition, as shown in fig. 4 and 5, the end plate for a battery module further includes: the pair of second clamping arms 4 are oppositely arranged on two sides of the connecting seat 3 along the extending direction of the end plate main body 1, the second clamping arms 4 extend outwards from the inner wall of the concave cavity 11 and are provided with second clamping hooks 42 at the outer ends, the second clamping hooks 42 are hooked on the outer side surface of the connecting seat 3, and the distance from the second clamping hooks 42 to the back wall of the concave cavity 11 is greater than the width of the connecting seat 3 along the extending direction vertical to the end plate main body 1. Therefore, the two second snap-in arms 4 do not limit the movement of the connecting seat 3 in the cavity 11, and the connecting seat 3 can still move in the cavity 11 in the direction perpendicular to the extending direction of the end plate body 1.

In addition, specifically, as shown in fig. 5, each of the pair of second click arms 4 includes: the second elastic rod 41 extends outwards from the inner wall of the cavity 11, the outer section of the second elastic rod 41 is spaced from the inner wall of the cavity 11, and the second hook 42 extends from the end of the second elastic rod 41 to the other second clamping arm 4.

In addition, specifically, as shown in fig. 5, along the extending direction of the end plate body 1, portions of the inner walls of the two sides of the concave cavity 11 are respectively inward concave into the cavity 11 to form a pair of receiving grooves 1112, the pair of second fastening arms 4 are respectively arranged in the pair of receiving grooves 1112, and the root of the second elastic rod 41 is fixedly connected with the groove wall of the receiving groove 1112, specifically, in this embodiment, the root of the second elastic rod 41 is fixedly connected with the groove wall of the receiving groove 1112 on the side facing the back wall, of course, in other embodiments, the root of the second elastic rod 41 may be connected with other groove walls as long as the scope of the present invention is not deviated. Also, as shown in fig. 5, the outer section of the second elastic rod 41 is spaced apart from the other groove wall of the receiving groove 1112.

Because two second elastic rods 41 are elastic rods, in the actual assembly process, when a worker needs to assemble the connecting seat 3 into the cavity 11, the worker can pull the two second elastic rods 41 outwards, then clamp the connecting seat 3 between the two second clamping arms 4, and when the connecting seat 3 needs to be disassembled, the worker can take the connecting seat 3 out of the cavity 11 as long as the worker pulls the two first elastic rods 22 and the two second elastic rods 41 outwards.

Of course, it should be noted that the second elastic rod 41 can be directly and fixedly connected to the back wall or the side wall 1111 of the cavity 11 besides being disposed in the receiving groove 1112, without departing from the scope of the present invention.

In addition, as shown in fig. 5, the end of the second hook 42 has a second guiding surface 421, and the second guiding surface 421 inclines toward the cavity 11 along the direction perpendicular to the extending direction of the end plate main body 1 from the root to the end of the second hook 42. Like this at actual assembling process, only need aim at two first joint arms 2 with two joint grooves 32 on the connecting seat 3 and promote connecting seat 3 inwards again, through two first spigot surface 211 on two first pothooks 21, and two second spigot surface 421 on two second pothooks 42, two first elastic rod 22 and two second elastic rod 41 are automatic toward pulling open outward, connecting seat 3 just pushes into cavity 11, and be in between two first joint arms 2 and two second joint arms 4, thereby the convenience of use of end plate has been improved.

A second embodiment of the present invention relates to a battery module, as shown in fig. 1 and 2, including: a frame body 5, a plurality of battery cells, a plurality of bars 6 and a fixing piece 7, wherein the frame body 5 is provided with end plates for a battery module as shown in the first embodiment, the plurality of battery cells are sequentially arranged in the frame body 5 along the extending direction vertical to the end plates, the bars 6 are electrically connected with the battery cells, the bus bar 6 is provided with an output pole 61, the output pole 61 is provided with a mounting hole 611, the mounting hole 611 is arranged coaxially with the positioning hole 33, the output pole 61 is arranged in a groove on the upper surface of the seat body, the fixing piece 7 is partially positioned in the mounting hole 611 and the positioning hole 33, the portion located in the positioning hole 33 is detachably connected to the positioning hole 33, while the other portion of the fixture 7 is located on the upper surface of the output pole 61, the radial dimension of the portion of the fixture 7 located in the positioning hole 33 and the mounting hole 611 is smaller than the radial dimension of the mounting hole 611 and the positioning hole 33, and the radial dimension of the portion located on the upper surface of the output pole 61 is larger than the radial dimension of the mounting hole 611.

Specifically, in the present embodiment, as shown in fig. 6, the fixing member 7 includes: a fixing rod 71 and a fixing cap 72, wherein the fixing rod 71 is located in the mounting hole 611 and the positioning hole 33 and detachably connected with the positioning hole 33, for example, the fixing rod 71 can be screwed into the positioning hole 33 or merely inserted in an interference fit manner, and the radial dimension of the fixing rod 71 is smaller than the radial dimension of the mounting hole 611 and the positioning hole 33, in this embodiment, the fixing rod 71 is a cylindrical rod, the positioning hole 33 and the mounting hole 611 are inner circular holes, and the outer diameter of the fixing rod 71 is smaller than the inner diameter of the positioning hole 33 and the mounting hole 611, of course, in some embodiments, the fixing rod 71 can also be a square rod, the positioning hole 33 and the mounting hole 611 are rectangular holes, and the length of the radial dimension in the length direction of the positioning hole 33 and the mounting hole 611 is larger than the.

As shown in fig. 6, the fixing cap 72 is coaxially and fixedly connected to the fixing rod 71 and is located on the upper surface of the output pole 61, the radial dimension of the fixing cap 72 is larger than the radial dimension of the mounting hole 611, in the present embodiment, the fixing cap 72 is circular, and the outer diameter of the fixing cap 72 is larger than the inner diameter of the mounting hole 611, so that the output pole 61 can be stably fixed to the connecting base 3.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. An end plate for a battery module, comprising:

the end plate comprises an end plate main body, wherein a concave cavity is formed in the end plate main body, and the concave cavity is opened towards the outer side face and the upper end face of the end plate main body;

the pair of first clamping arms extend outwards from the inner wall of the concave cavity along the extending direction vertical to the end plate main body, and are provided with first clamping hooks at the outer ends;

2. The end plate for a battery module according to claim 1, wherein each of the pair of first snap arms comprises:

3. The end plate for a battery module according to claim 2, wherein a distance between two first elastic bars of the pair of first catching arms is greater than a distance between groove bottoms of two catching grooves.

4. The end plate for a battery module according to claim 2 or 3, wherein the height of the first elastic bar is smaller than the groove width of the catching groove.

5. The end plate for a battery module according to claim 2, wherein the first hook end portion has a first guide surface that slopes toward the inside of the cavity in a direction perpendicular to the direction of extension of the end plate main body from the root portion to the end portion of the first hook.

6. The end plate for a battery module according to claim 1, further comprising: the pair of second clamping arms are oppositely arranged on two sides of the connecting seat along the extending direction of the end plate main body, extend outwards from the inner wall of the concave cavity and are provided with second clamping hooks at the outer ends;

7. The end plate for a battery module according to claim 6, wherein each of the pair of second snap arms comprises:

8. The end plate for a battery module according to claim 7, wherein, along the extending direction of the end plate body, parts of the inner walls of the two sides of the concave cavity are respectively recessed inwards to form a pair of accommodating grooves, the pair of second clamping arms are respectively arranged in the pair of accommodating grooves, the root of the second elastic rod is fixedly connected with the groove walls of the accommodating grooves, and the outer section of the second elastic rod is separated from the groove walls of the accommodating grooves.

9. The end plate for a battery module according to claim 7, wherein the end portion of the second hook has a second guide surface that slopes toward the inside of the cavity in a direction perpendicular to the direction of extension of the end plate main body from the root portion to the end portion of the second hook.

10. A battery module, comprising:

a frame body including the end plate for a battery module according to any one of claims 1 to 3 and 5 to 9;

11. The battery module according to claim 10, wherein the fixing member comprises: