CN221239729U - Battery module and battery pack - Google Patents

Abstract

The application discloses a battery module and a battery pack. The battery module comprises a battery core assembly, a fixing assembly and an elastic supporting layer. The battery cell assembly comprises a plurality of battery cells, and the battery cells are sequentially arranged along the length direction of the battery module; the fixing assembly comprises a first end plate, a second end plate and a fixing belt, the first end plate and the second end plate are respectively arranged at two ends of the battery cell assembly in the length direction, and the fixing belt is sleeved on the peripheries of the first end plate, the battery cell assembly and the second end plate so as to fix the battery cell assembly between the first end plate and the second end plate; the elastic support layer is respectively arranged between the first end plate and the first end of the battery cell assembly and between the second end plate and the second end of the battery cell assembly opposite to the first end. The application can solve the problems that the battery modules in the prior art deform in a group fixing mode, so that the stress of the battery modules is uneven and the service life of the battery modules is reduced.

Description

Battery module and battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a battery module and a battery pack.

Background

The battery cells of the battery module are generally covered by a layer of simple metal shell, and a plurality of battery cells are stacked to form the battery module. At present, the group fixing mode of the battery module is usually mainly based on plastic or double plastic under a steel belt, and isolation and limit are carried out among a plurality of battery cells by using a glue or plastic bracket. Because the battery cell can expand after multiple cycles, when the battery module is fixed by adopting the method of plastic or double plastic under the upper steel belt, the plastic or the steel belt can deform, so that the stress of the battery module is uneven, the fixing strength of the battery module is reduced, and the service life of the battery module is further influenced.

Disclosure of utility model

The application mainly aims to provide a battery module and a battery pack, which are used for solving the problems that in the prior art, the battery module group fixing mode is deformed, so that the stress of the battery module is uneven and the service life of the battery module is reduced.

According to one aspect of the present application, there is provided a battery module including a battery cell assembly including a plurality of battery cells, the plurality of battery cells being sequentially arranged along a length direction of the battery module;

The battery module further includes:

The fixing assembly comprises a first end plate, a second end plate and a fixing belt, the first end plate and the second end plate are respectively arranged at two ends of the battery cell assembly in the length direction, and the fixing belt is sleeved on the peripheries of the first end plate, the battery cell assembly and the second end plate so as to fix the battery cell assembly between the first end plate and the second end plate;

the elastic support layer is respectively arranged between the first end plate and the first end of the battery cell assembly and between the second end plate and the second end of the battery cell assembly opposite to the first end.

Further, the elastic support layer comprises a foam layer.

Further, an elastic buffer layer is arranged between two adjacent battery cells.

Further, the elastic buffer layer comprises a foam layer or a silica gel layer.

Further, be provided with first spacing groove on the first end plate, first spacing groove is followed the width direction of battery module extends, be provided with the second spacing groove on the second end plate, the second spacing groove is followed the width direction of battery module extends, the fixed band cover is established first spacing groove with in the second spacing groove.

Further, the plurality of first limit grooves are sequentially arranged at intervals along the height direction of the first end plate;

The second limiting grooves are formed in a plurality, the second limiting grooves are sequentially arranged at intervals along the height direction of the second end plate, and the first limiting grooves and the second limiting grooves are arranged in a one-to-one correspondence manner;

the fixing belts are arranged in a plurality, and the fixing belts are sleeved in the corresponding first limiting groove and the second limiting groove respectively.

Further, the fixed band includes two steel band sections and two insulating band sections, two the steel band section with two the insulating band section is arranged in turn and is connected gradually, two the steel band section set up in first spacing groove with in the second spacing groove, two the insulating band section is all followed the length direction of electric core subassembly extends.

Further, the first end plate and the second end plate are BMC end plates, at least one groove is formed in one side, away from the battery cell assembly, of each BMC end plate, and reinforcing ribs are arranged in the grooves.

Further, the battery module further includes:

The top plate extends along the length direction of the battery cell assembly to cover the battery cell assembly and is fixedly connected with the first end plate and the second end plate;

The first end plate is fixedly connected with the third end of the top plate, and the second end plate is fixedly connected with the fourth end of the top plate opposite to the third end through a locking piece.

On the other hand, the application also provides a battery pack, which comprises the battery module.

In the application, when the battery module is actually used, the elastic supporting layers are respectively arranged between the first end plate and the first end of the battery cell assembly and between the second end plate and the second end of the battery cell assembly, the first end plate and the second end plate are extruded to the size set by the fixing belt by applying pressure to the first end plate and the second end plate in the direction of the battery cell assembly, and then the fixing belt is sleeved on the peripheries of the first end plate, the battery cell assembly and the second end plate. Compared with the grouping fixing mode of the battery module adopted in the background art, the novel first end plate, the novel second end plate and the novel elastic supporting layer which are added at the two ends of the battery cell assembly can ensure that the battery module is stressed uniformly in the process of circulating operation, the fixing belt is prevented from deforming, and the service life of the battery module is prolonged to a certain extent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

Fig. 1 is a perspective view of a battery module according to an embodiment of the present application;

Fig. 2 is a side view of a battery module according to an embodiment of the present application;

FIG. 3 is a schematic view of a first end plate according to an embodiment of the present application;

fig. 4 is a schematic structural view of a second end plate according to an embodiment of the present application.

Wherein the above figures include the following reference numerals:

10. A cell assembly; 11. a battery cell; 101. a first end; 102. a second end; 20. a fixing assembly; 21. a first end plate; 211. a first limit groove; 22. a second end plate; 221. the second limit groove; 23. a fixing belt; 231. a steel strip section; 232. an insulating tape section; 30. an elastic support layer; 40. an elastic buffer layer; 50. a groove; 60. reinforcing ribs; 70. a top plate; 701. a third end; 702. a fourth end; 71. a locking piece.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As described in the background art, the existing battery module is fixed in groups by using plastic or double plastic under the upper steel belt as the main material and using glue or plastic brackets to separate and limit the battery cells. Because the battery cell can expand after multiple cycles, when the battery module is fixed by adopting the method of plastic or double plastic under the upper steel belt, the plastic or the steel belt can deform, so that the stress of the battery module is uneven, the fixing strength of the battery module is reduced, and the service life of the battery module is further influenced. In order to avoid the problem that the service life of the battery module is reduced due to uneven stress of the battery module, the inventor designs a novel battery module, and the battery module of the application is described in detail below.

Referring to fig. 1 to 4, the present application provides a battery module including a battery cell assembly 10, a fixing assembly 20, and an elastic support layer 30.

The battery cell assembly 10 comprises a plurality of battery cells 11, and the battery cells 11 are sequentially arranged along the length direction of the battery module; the fixing assembly 20 comprises a first end plate 21, a second end plate 22 and a fixing belt 23, wherein the first end plate 21 and the second end plate 22 are respectively arranged at two ends of the cell assembly 10 in the length direction, and the fixing belt 23 is sleeved on the peripheries of the first end plate 21, the cell assembly 10 and the second end plate 22 so as to fix the cell assembly 10 between the first end plate 21 and the second end plate 22; the elastic support layer 30 is disposed between the first end plate 21 and the first end 101 of the cell assembly 10, and between the second end plate 22 and the second end 102 of the cell assembly 10 opposite to the first end 101, respectively.

In the present embodiment, the battery cell assembly 10 includes a plurality of battery cells 11, and the fixing assembly 20 includes a first end plate 21, a second end plate 22, and a fixing strap 23. When the battery module is actually processed, the plurality of battery cells 11 can be sequentially arranged along the length direction of the battery module, and the first end plate 21, the second end plate 22 and the elastic support layer 30 are arranged at two ends along the length direction of the battery module 10, wherein the elastic support layer 30 is respectively positioned between the first end plate 21 and the first end 101 of the battery module 10 and between the second end plate 22 and the second end 102 of the battery module 10, and then the fixing belt 23 is sleeved on the peripheries of the first end plate 21, the battery module 10 and the second end plate 22. Once assembled, the cell assembly 10 and the resilient support layer 30 may be secured between the first end plate 21 and the second end plate 22.

That is, in actual use of the battery module, the elastic support layer 30 may be disposed between the first end plate 21 and the first end 101 of the battery cell assembly 10 and between the second end plate 22 and the second end 102 of the battery cell assembly 10, respectively, and the battery cell assembly 10, the first end plate 21, and the second end plate 22 may be pressed into the dimensions set by the fixing band 23 by applying pressure to the first end plate 21 and the second end plate 22 in the direction of the battery cell assembly 10, and then the fixing band 23 may be sleeved on the outer circumferences of the first end plate 21, the battery cell assembly 10, and the second end plate 22. Compared with the grouping fixing mode of the battery module adopted in the background art, the first end plate 21, the second end plate 22 and the elastic supporting layer 30 which are newly added at the two ends of the battery cell assembly 10 can ensure that the stress of the battery module is uniform in the process of circulating operation, the fixing belt 23 is prevented from deforming, and the service life of the battery module is further prolonged to a certain extent.

Further, the elastic support layer 30 in the present embodiment includes a foam layer. As can be seen in conjunction with fig. 2, the present embodiment places the elastic support layer 30 between the first end plate 21 and the first end 101 of the cell assembly 10, and between the second end plate 22 and the second end 102 of the cell assembly 10 opposite to the first end 101, respectively. So set up, when the battery module begins to work, the existence of elastic support layer 30 can avoid the cell module 10 after the inflation to rub with first end plate 21 and second end plate 22, and then can not cause the damage to the shell of battery module. The elastic supporting layer 30 of this embodiment includes a foam layer, which has better elasticity and lighter weight, and is used as the elastic supporting layer 30, when the cell assembly 10 expands, the foam layer can be restored to the original state after being extruded, and in this process, the excessive expansion of the cell assembly 10 can be avoided, and the service life of the battery module is further improved.

Furthermore, the foam layer can be made of polypropylene porous foam material or polypropylene plastic foam material, and the polypropylene porous foam material and the polypropylene plastic foam material are provided with a large number of tiny cells inside, so that the material has excellent performances of shock absorption, buffering, heat insulation and the like, and can be recycled.

Further, an elastic buffer layer 40 is disposed between two adjacent cells 11 in the present embodiment. Referring to fig. 2, the elastic buffer layer 40 is disposed between two adjacent cells 11 in this embodiment, which can absorb the tolerance existing in the battery module and facilitate stacking of multiple cells 11 in the cell assembly 10. Meanwhile, the elastic buffer layer 40 can buffer the expansion deformation of the battery cell 11, so as to reduce the influence on other battery cells 11 and further reduce the expansion deformation of the battery cell assembly 10. In addition, since the fixing belt 23 is sleeved on the periphery of the cell assembly 10, the elastic buffer layer 40 is arranged between two adjacent cells 11 in the embodiment, so that the expanded cell assembly 10 is prevented from generating larger acting force on the fixing belt 23 to a certain extent, and further, the fixing belt 23 is prevented from being broken.

Specifically, the elastic buffer layer 40 in this embodiment includes a foam layer or a silicone layer. Because the foam layer has better elasticity and lighter weight, the silica gel layer has certain tension, flexibility and excellent insulativity, and the foam layer or the silica gel layer is used as the elastic buffer layer 40 to be arranged between two adjacent electric cores 11, the grouped electric core assembly 10 can be protected, and the damage caused by friction between the electric cores 11 is avoided.

Further, a first limiting groove 211 is provided on the first end plate 21 in the present embodiment, the first limiting groove 211 extends along the width direction of the battery module, a second limiting groove 221 is provided on the second end plate 22, the second limiting groove 221 extends along the width direction of the battery module, and the fixing belt 23 is sleeved in the first limiting groove 211 and the second limiting groove 221. As shown in fig. 3 to 4, the first end plate 21 and the second end plate 22 are disposed at two ends of the cell assembly 10 in the longitudinal direction, and the first end plate 21 and the second end plate 22 are provided with the first limit groove 211 and the second limit groove 221, respectively. So set up, when establishing fixed band 23 cover in first spacing groove 211 and second spacing groove 221, the existence of first spacing groove 211 and second spacing groove 221 can play location and spacing effect to fixed band 23 to prevent that fixed band 23 from appearing landing or shifting the phenomenon in the battery module use, and then can improve fixed band 23 and carry out the ability of fixing to electric core assembly 10, first end plate 21 and second end plate 22. In addition, the first limiting groove 211 and the second limiting groove 221 in the present embodiment extend along the width direction of the battery module, and in this process, the depth of the extending first limiting groove 211 and the extending second limiting groove 221 needs to ensure that the fixing strap 23 can be completely embedded in the first limiting groove 211 and the second limiting groove 221.

Further, in the present embodiment, the first limiting grooves 211 are plural, and the plural first limiting grooves 211 are sequentially arranged at intervals along the height direction of the first end plate 21; the second limiting grooves 221 are multiple, the second limiting grooves 221 are sequentially arranged at intervals along the height direction of the second end plate 22, and the first limiting grooves 211 are arranged in one-to-one correspondence with the second limiting grooves 221; the fixing belts 23 are multiple, and the fixing belts 23 are respectively sleeved in the corresponding first limiting groove 211 and the second limiting groove 221. As can be seen from fig. 3 to 4, in this embodiment, two first limiting grooves 211 are provided on the first end plate 21, two second limiting grooves 221 are also provided on the second end plate 22, and the two first limiting grooves 211 are sequentially spaced along the height direction of the first end plate 21, and the two second limiting grooves 221 are sequentially spaced along the height direction of the second end plate 22, and meanwhile, the two first limiting grooves 211 and the two second limiting grooves 221 are respectively provided in one-to-one correspondence. After the first limiting groove 211 and the second limiting groove are set, the two fixing belts 23 are respectively sleeved in the corresponding first limiting groove 211 and second limiting groove 221. By the arrangement, the fixing capability of the fixing belt 23 to the battery cell assembly 10 can be improved, and the battery cell 11 in the battery module is not easy to fall off. From the above description, it can be seen that the battery module of the present application may further include a plurality of first limiting grooves 211, second limiting grooves 221 and fixing bands 23, and any other modification forms within the concept of the present application are within the scope of the present application.

Further, the fixing belt 23 in the present embodiment includes two steel belt sections 231 and two insulating belt sections 232, the two steel belt sections 231 and the two insulating belt sections 232 are alternately arranged and sequentially connected, the two steel belt sections 231 are disposed in the first limiting groove 211 and the second limiting groove 221, and the two insulating belt sections 232 all extend along the length direction of the cell assembly 10. Because the steel belt segment 231 of the embodiment is harder, the steel belt segment 231 is arranged in the first limiting groove 211 and the second limiting groove 221, and the battery cell assembly 10 can be better limited, so that excessive deformation of the battery cell 11 is avoided, and the service life of the battery module is prolonged. Meanwhile, since the insulating tape section 232 can play a good insulating effect, the insulating tape section 232 is arranged on the periphery of the battery cell assembly 10, so that good insulating performance between the battery cell assembly 10 and the insulating tape section 232 can be guaranteed, the condition of short circuit can be effectively avoided, the battery cell assembly 10 can be protected, and damage to the battery cell assembly 10 caused by friction between the battery cell assembly 10 and the battery module shell can be avoided. In this embodiment, the first end plate 21 and the second end plate 22 are respectively disposed at two ends of the cell assembly 10 in the length direction, and the fixing strap 23 is sleeved on the peripheries of the first end plate 21, the cell assembly 10 and the second end plate 22, so that the fixing strap 23 can fix the cell assembly 10 between the first end plate 21 and the second end plate 22.

In an embodiment of the present application (not shown in the drawings), the first limiting groove 211 and the second limiting groove 221 respectively comprise one, and at this time, the fixing strap 23 comprises two steel strap sections 231 and two insulating strap sections 232, and in this embodiment, the two steel strap sections 231 are respectively disposed in the first limiting groove 211 and the second limiting groove 221 correspondingly, and the two insulating strap sections 232 are sequentially connected with the two steel strap sections 231, so that the two insulating strap sections 232 are fixed on the periphery of the cell assembly 10 along the length direction of the cell assembly 10, thereby fixing the cell assembly 10. Referring to fig. 1 to 2, in another embodiment of the present application, the first and second limiting grooves 211 and 221 respectively include two, the two first and second limiting grooves 211 and 221 are spaced apart in the height direction of the first and second end plates 21 and 22 respectively, and the fixing strap 23 includes four steel strap sections 231 and four insulating strap sections 232. Therefore, in this embodiment, the four steel belt segments 231 are respectively disposed in the two first limiting grooves 211 and the two second limiting grooves 221, and the four insulating belt segments 232 are alternately disposed and sequentially connected to the four steel belt segments 231, in this process, the two fixing belts 23 composed of the four steel belt segments 231 and the four insulating belt segments 232 are respectively sleeved on the peripheries of the first end plate 21, the battery cell assembly 10 and the second end plate 22, so that the fixing of the first end plate 21, the battery cell assembly 10 and the second end plate 22 can be realized. From the above description, it can be seen that the fixing band 23 of the present application may further comprise a plurality of steel band segments 231 and a plurality of insulating band segments 232, and any other modification within the spirit of the present application is within the scope of the present application.

Further, in this embodiment, the first terminal 21 and the second terminal 22 are BMC terminals, at least one groove 50 is provided on a side of the BMC terminal facing away from the cell assembly 10, and a reinforcing rib 60 is provided in the groove 50. BMC is a composite material formed by extrusion after uniformly mixing glass fiber, filler, resin and additives, and can be used for compression molding and injection molding. BMC has excellent properties such as high strength, high temperature resistance, corrosion resistance, high density, etc. In this embodiment, the BMC is molded and injection molded to form the first end plate 21 and the second end plate 22, the first end plate 21 and the second end plate 22 are disposed at two ends of the length direction of the battery cell assembly 10, and the fixing belt 23 is sleeved on the peripheries of the first end plate 21, the battery cell assembly 10 and the second end plate 22, so that the first end plate 21 and the second end plate 22 which are subjected to die casting can ensure that the large-area stress of the battery cell assembly 10 is uniform, and the BMC end plate and the fixing belt 23 are combined, so that the deformation of the battery cell assembly 10 can be avoided, and the service life of the battery module is further prolonged. In addition, referring to fig. 3 to 4, in this embodiment, at least one groove 50 is provided on the side of the BMC terminal facing away from the cell assembly 10, and a reinforcing rib 60 is provided in the groove 50. So set up, not only can alleviate the weight of first end plate 21 and second end plate 22, be favorable to battery module's lightweight design, can also strengthen the structural strength of first end plate 21 and second end plate 22 to reduce the inflation of electric core subassembly 10, effectively promote battery module's life, and be convenient for electric core subassembly 10's group.

Further, the battery module in the present embodiment further includes a top plate 70, where the top plate 70 extends along the length direction of the battery cell assembly 10 to cover the battery cell assembly 10 and is fixedly connected to the first end plate 21 and the second end plate 22; the first end plate 21 is fixedly connected to the third end 701 of the top plate 70 and the second end plate 22 is fixedly connected to the fourth end 702 of the top plate 70 opposite to the third end 701 by a locking member 71. Referring to fig. 1 to 2, in the embodiment, the top plate 70 extends along the length direction of the battery cell assembly 10 and covers the battery cell assembly, so as to protect the circuit of the battery cell assembly 10, and further effectively avoid the occurrence of short circuit of the battery module in the working process. In this embodiment, the first end plate 21 and the second end plate 22 are disposed at two ends of the cell assembly 10 in the length direction, at this time, the third end 701 of the top plate 70 is fixedly connected to the first end plate 21 by the locking member 71, and the fourth end 702 of the top plate 70 is fixedly connected to the second end plate 22 by the locking member 71. The locking piece comprises a bolt and a nut, wherein the nut is provided with an internal threaded hole, the shape of the nut comprises a flat hexagonal column shape or a flat square column shape or a flat cylindrical shape, and the nut is matched with the bolt and is used for fastening and connecting two parts so that the two parts are integrated; the bolt comprises a head, a screw rod and a threaded end, wherein the head is positioned at one end of the bolt, the screw rod is a main body part of the bolt and is a cylinder with a threaded section, and the screw rod is matched with a nut for use and is used for fastening two parts with through holes. In this embodiment, the top plate 70 is fixedly connected with the first end plate 21 and the second end plate 22 through the locking member 71, so that the top plate 70 is convenient to disassemble, and the convenience and the rapidness are realized.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects: compared with the grouping fixing mode of the battery module in the prior art, the first end plate, the second end plate and the elastic supporting layer which are added in the application make up for the defects of uneven stress and low service life of the battery module in the fixing process of the battery cell assembly, strengthen the fixing strength of the battery module and effectively improve the service life of the battery module.

On the other hand, the embodiment of the application also provides a battery pack which comprises the battery module, so that the battery pack comprises all the technical effects of the battery module. Since the technical effects of the battery module have been described in detail in the foregoing, a detailed description thereof will be omitted.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a battery module, includes electric core subassembly, electric core subassembly includes a plurality of electric cores, and a plurality of electric core is followed the length direction of battery module arranges in proper order, its characterized in that, battery module still includes:

The fixing assembly comprises a first end plate, a second end plate and a fixing belt, the first end plate and the second end plate are respectively arranged at two ends of the battery cell assembly in the length direction, and the fixing belt is sleeved on the peripheries of the first end plate, the battery cell assembly and the second end plate so as to fix the battery cell assembly between the first end plate and the second end plate;

the elastic support layer is respectively arranged between the first end plate and the first end of the battery cell assembly and between the second end plate and the second end of the battery cell assembly opposite to the first end.

2. The battery module of claim 1, wherein the elastic support layer comprises a foam layer.

3. The battery module according to claim 1, wherein an elastic buffer layer is provided between two adjacent cells.

4. The battery module of claim 3, wherein the elastic buffer layer comprises a foam layer or a silicone layer.

5. The battery module according to claim 1, wherein a first limit groove is provided on the first end plate, the first limit groove extends in a width direction of the battery module, a second limit groove is provided on the second end plate, the second limit groove extends in the width direction of the battery module, and the fixing strap is sleeved in the first limit groove and the second limit groove.

6. The battery module according to claim 5, wherein the plurality of first limiting grooves are sequentially arranged at intervals along the height direction of the first end plate;

The second limiting grooves are formed in a plurality, the second limiting grooves are sequentially arranged at intervals along the height direction of the second end plate, and the first limiting grooves and the second limiting grooves are arranged in a one-to-one correspondence manner;

the fixing belts are arranged in a plurality, and the fixing belts are sleeved in the corresponding first limiting groove and the second limiting groove respectively.

7. The battery module of claim 5, wherein the fixing strap comprises two steel strap segments and two insulating strap segments, the two steel strap segments and the two insulating strap segments are alternately arranged and sequentially connected, the two steel strap segments are arranged in the first limit groove and the second limit groove, and the two insulating strap segments extend along the length direction of the cell assembly.

8. The battery module of claim 1, wherein the first end plate and the second end plate are BMC end plates, at least one groove is formed in one side of the BMC end plate, which faces away from the battery cell assembly, and reinforcing ribs are arranged in the grooves.

9. The battery module according to any one of claims 1 to 8, further comprising:

The top plate extends along the length direction of the battery cell assembly to cover the battery cell assembly and is fixedly connected with the first end plate and the second end plate;

The first end plate is fixedly connected with the third end of the top plate, and the second end plate is fixedly connected with the fourth end of the top plate opposite to the third end through a locking piece.

10. A battery pack, characterized in that the battery pack comprises the battery module according to any one of claims 1 to 9.