Battery pack and vehicle

Abstract

This utility model discloses a battery pack and a vehicle, relating to the field of new energy technology. The battery pack of this utility model includes a housing and a battery module. The battery module includes a battery pack and a movable end plate. The battery pack includes multiple individual batteries arranged along a first direction. The movable end plate is disposed at at least one end of the battery pack and abuts against the battery pack. The movable end plate is slidably disposed within the housing and moves along the first direction as the battery pack expands or contracts. The battery module also includes a guide structure extending along the first direction. The guide structure is disposed within the housing, and the movable end plate has a mating structure that slidably connects with the guide structure to guide the movement of the movable end plate. This battery pack can guide the movement of the movable end plate, reducing the probability of the movable end plate jamming or shifting.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a battery pack and vehicle. Background Technology

[0002] With the development of all-solid-state battery technology, battery energy density and charge / discharge rate continue to improve. However, the issue of volume expansion of individual cells during charge / discharge cycles is becoming increasingly prominent. If the expansion force cannot be effectively released, it can lead to uncontrolled internal pressure in individual cells, thereby affecting the battery pack's lifespan and safety. To accommodate the expansion deformation of solid-state batteries, related technologies employ a movable end plate at the end of the battery pack. The movable end plate absorbs the force generated by the expansion of individual cells, maintaining stable internal pressure and ensuring the normal operation of the battery pack.

[0003] However, under complex operating conditions such as long-term charge-discharge cycles and vehicle vibrations, the movable end plate is prone to jamming and misalignment. Once the end plate jams and cannot move normally, the pressure generated by the expansion of individual cells cannot be released in time, leading to a continuous increase in internal pressure of the battery pack and eventually causing battery failure. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that can guide the movement of the movable end plate, reducing the probability of the movable end plate getting stuck or shifting.

[0005] This utility model also proposes a vehicle having the above-mentioned battery pack.

[0006] The battery pack according to a first aspect embodiment of the present invention includes:

[0007] Box;

[0008] A battery module, comprising a battery pack and a movable end plate, wherein the battery pack comprises a plurality of individual cells arranged along a first direction; the movable end plate is disposed at at least one end of the battery pack and abuts against the battery pack, the movable end plate is slidably disposed in the housing and moves along the first direction as the battery pack expands or contracts;

[0009] The battery module further includes a guide structure extending along the first direction. The guide structure is disposed in the housing. The movable end plate is provided with a mating structure that is slidably connected to the guide structure to guide the movement of the movable end plate.

[0010] The battery pack according to the embodiments of the present invention has at least the following beneficial effects:

[0011] This application achieves guided movement of the movable end plate by setting a guide structure in the housing and a mating structure on the movable end plate, thus ensuring the straightness of the movable end plate when moving along the first direction and reducing the probability of jamming or deviation. When the battery pack expands, if there is uneven local deformation, the cooperation between the guide rail and the slide groove can also effectively suppress the deflection of the movable end plate, thereby ensuring that the movable end plate always moves smoothly along the first direction, thus making the force on the elastic element uniform and improving the reliability and service life of the elastic element.

[0012] According to some embodiments of the present invention, the housing includes a bottom plate and a beam protruding from the bottom plate along a third direction. The battery module is provided with the beam on at least one side along the second direction, and the beam is provided with the guide structure. The second direction intersects with the first direction.

[0013] According to some embodiments of the present invention, the battery pack includes a plurality of battery modules arranged along the second direction, the beam includes two side beams and at least one intermediate beam, the intermediate beam and the battery modules are both located between the two side beams, and the intermediate beam is used to separate two adjacent battery modules;

[0014] The intermediate beam is provided with a guide structure on at least one side along the second direction. The guide structure is a protrusion that extends along the first direction to both ends of the intermediate beam. The mating structure is a groove that matches the protrusion.

[0015] According to some embodiments of the present invention, the guide structure is located on the side of the intermediate beam close to the base plate along the third direction and is connected to the base plate.

[0016] According to some embodiments of the present invention, the beam body includes two side beams, and the battery modules are all located between the two side beams;

[0017] The guide structure is provided on the side of the side beam facing the battery module. The guide structure is a protrusion, and the mating structure is a groove that matches the protrusion.

[0018] According to some embodiments of the present invention, the housing includes a bottom plate, and the guide structure is disposed on the bottom plate.

[0019] According to some embodiments of the present invention, the mating structure is a groove, the guiding structure is a guide rail, and the guide rail passes through the groove;

[0020] Alternatively, the mating structure is a slider, the guiding structure is a groove, and the slider is embedded in the groove;

[0021] Alternatively, the mating structure is a through hole, the guiding structure is a guide rod, and the guide rod passes through the through hole.

[0022] According to some embodiments of the present invention, in the same battery module, the number of the battery pack and the movable end plate is one. The battery module further includes an elastic element and a first fixed end plate. The first fixed end plate and the movable end plate are located at the same end of the battery pack and are spaced apart. The elastic element is located between the first fixed end plate and the movable end plate. The battery module further includes a second fixed end plate. The second fixed end plate and the first fixed end plate are located at different ends of the battery pack along the first direction.

[0023] The battery module further includes a connector extending along the first direction, with its two ends connected to the first fixed end plate and the second fixed end plate, respectively.

[0024] According to some embodiments of the present utility model, in the same battery module, there are two battery packs and two movable end plates. The battery module also includes an elastic element and two second fixed end plates. The movable end plates and the elastic element are both located between the two battery packs, and the two battery packs are both disposed between the two second fixed end plates.

[0025] The battery module further includes a connector extending along the first direction, with two ends of the connector respectively connected to two second fixed end plates.

[0026] According to some embodiments of this utility model, the connector is the guide structure.

[0027] The vehicle according to a second aspect of the present invention includes the battery pack proposed in any of the above embodiments.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention;

[0031] Figure 2 This is a top view of the battery pack according to an embodiment of the present utility model;

[0032] Figure 3 for Figure 2 Enlarged schematic diagram of a section view along the AA direction;

[0033] Figure 4 This is a schematic diagram of the structure of the box body according to an embodiment of the present utility model;

[0034] Figure 5 This is a schematic diagram of a battery module according to one embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of a battery module according to another embodiment of the present invention.

[0036] Figure label:

[0037] Box girder 100; beam 110; side beam 111; intermediate beam 112; bottom plate 120;

[0038] Battery module 200; battery pack 210; single cell 211; movable end plate 220; guide structure 230; mating structure 240; elastic element 250; first fixed end plate 260; second fixed end plate 270; connector 280; locking element 290. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] With the development of all-solid-state battery technology, battery energy density and charge / discharge rate continue to improve. However, the issue of volume expansion of individual cells during charge / discharge cycles is becoming increasingly prominent. If the expansion force cannot be effectively released, it can lead to uncontrolled internal pressure in individual cells, thereby affecting the battery pack's lifespan and safety. To accommodate the expansion deformation of solid-state batteries, related technologies employ a movable end plate at the end of the battery pack. The movable end plate absorbs the force generated by the expansion of individual cells, maintaining stable internal pressure and ensuring the normal operation of the battery pack.

[0045] However, under complex operating conditions such as long-term charge-discharge cycles and vehicle vibrations, the movable end plate is prone to jamming and misalignment. Once the end plate jams and cannot move normally, the pressure generated by the expansion of individual cells cannot be released in time, leading to a continuous increase in internal pressure of the battery pack and eventually causing battery failure.

[0046] To address the aforementioned problems, this application proposes a battery pack, such as... Figures 1 to 4 As shown, the battery pack includes a housing 100 and battery modules 200. The housing 100 defines a receiving cavity, within which the battery modules 200 are disposed. The housing 100 includes a base plate 120 and a beam 110 protruding from the base plate 120 along a third direction. The base plate 120 has a heat dissipation and cooling structure, and the beam 110 is used to improve the structural strength of the housing 100 and provides protection. One battery module 200 can be disposed in the housing 100, with the beam 110 surrounding the battery module 200. Multiple battery modules 200 can also be disposed in the housing 100, with a central beam 112 extending along a first direction within the receiving cavity and separating adjacent battery modules 200.

[0047] Each battery module 200 includes at least one battery pack 210, for example, in... Figure 5 In the illustrated embodiment, the battery module 200 includes a battery pack 210, in such a way as Figure 6In the illustrated embodiment, the battery module 200 includes two battery packs 210 arranged along a first direction. Each battery pack 210 includes multiple individual cells 211 arranged along the first direction, and a buffer layer is provided between each individual cell 211 to absorb some of the deformation when the individual cell 211 expands and reduce the contact stress between the individual cells 211.

[0048] To accommodate the significant expansion and deformation of solid-state batteries during operation, the battery module 200 of this application is further equipped with a movable end plate 220. At least one end of the battery pack 210 is provided with the movable end plate 220, which abuts against the battery pack 210 and is slidably disposed within the housing 100 along a first direction. When the battery pack 210 expands or contracts, the movable end plate 220 moves along the first direction. An elastic element 250 is provided on the side of the movable end plate 220 facing away from the battery pack 210. One end of the elastic element 250 is connected to the movable end plate 220, and the other end is directly or indirectly connected to the housing 100, thereby absorbing the displacement caused by the expansion or contraction of the battery pack 210 through the deformation of the elastic element 250.

[0049] For example, in such Figure 5 In the illustrated embodiment, the battery pack 210 has a movable end plate 220 and a first fixed end plate 260 at one end along the first direction, and a second fixed end plate 270 at the other end. Both the first fixed end plate 260 and the second fixed end plate 270 are fixedly connected to the housing 100. The expansion displacement generated by the deformation of each individual battery cell 211 in the battery pack 210 gradually accumulates and is transmitted to the end of the battery pack 210 with the movable end plate 220, where it is absorbed by the elastic element 250. It is understood that in other embodiments, both ends of the battery pack 210 along the first direction may also have movable end plates 220 and elastic elements 250, so that the expansion deformation of the battery pack 210 can be absorbed collaboratively by the elastic elements 250 at both ends.

[0050] To improve the stability and reliability of the sliding of the movable end plate 220, the battery module 200 also includes a guide structure 230, which is disposed in the housing 100 and extends along the first direction. It should be explained that the guide structure 230 can be a solid structure, such as a guide rail or guide rod, or a virtual structure, such as a guide groove provided on the inner wall of the housing 100.

[0051] Correspondingly, the movable end plate 220 is provided with a mating structure 240 that matches the guide structure 230. The mating structure 240 slides with the guide structure 230 to guide the movement of the movable end plate 220. For example, when the guide structure 230 is a guide rail, the mating structure 240 is a groove provided on the movable end plate 220; when the guide structure 230 is a guide groove, the mating structure 240 is a guide block provided on the movable end plate 220.

[0052] Exemplary (not shown in the figure), a guide rail extending along a first direction is provided on the bottom plate 120 of the housing 100. The movable end plate 220 slides with the guide rail through a groove to ensure the straightness of the movable end plate 220 when moving along the first direction, avoiding tilting and shaking. When the battery pack 210 expands, if there is uneven local deformation, the cooperation between the guide rail and the groove can also effectively suppress the deflection of the movable end plate 220, thereby ensuring that the movable end plate 220 always moves smoothly along the first direction, thus making the force on the elastic element 250 uniform and improving the reliability and service life of the elastic element 250.

[0053] In some embodiments, based on the foregoing, the box body 100 includes a base plate 120 and a beam 110 protruding from the base plate 120 in a third direction. Figures 2 to 4 In the illustrated embodiment, each battery module 200 has a beam 110 on at least one side along the second direction, and the beam 110 extends along the first direction to provide lateral support and protection for the battery pack 210. The beam 110 is provided with a guide structure 230 to integrate a guiding function, thereby simplifying the structure of the housing 100 and reducing assembly complexity.

[0054] For example Figure 2 and Figure 3 In the illustrated embodiment, the battery includes multiple battery modules 200 arranged along a second direction. Correspondingly, the battery pack includes multiple beams 110. For ease of description, the outermost beam 110 of the battery pack along the second direction is named the side beam 111, and the remaining beams 110 extending along the first direction are named the intermediate beams 112. Each battery module 200 and each intermediate beam 112 are located between two side beams 111. It can be understood that the number of intermediate beams 112 is at least one, so as to separate two adjacent battery modules 200.

[0055] The intermediate beam 112 has a guide structure 230 on at least one side along the second direction. The guide structure 230 is a protrusion, and the mating structure 240 is a groove adapted to the protrusion. The protrusion extends along the first direction to both ends of the intermediate beam 112, and the two ends of the protrusion are flush with the ends of the intermediate beam 112. It can be understood that directly machining the protrusion onto the surface of the intermediate beam 112 not only eliminates the need for additional guide rail installation but also strengthens the structural strength of the beam 110.

[0056] In addition, in such Figure 2 and Figure 3In the illustrated embodiment, the side beam 111 extends along a first direction, and its surface facing the battery module 200 is also provided with a protrusion that matches the movable end plate 220. This protrusion, together with the protrusion on the intermediate beam 112, forms a double-sided guiding system to make the movement of the movable end plate 220 more stable and reliable. It can be understood that the protrusion on the side beam 111 can be as follows: Figure 4 The partial arrangement shown can reduce processing costs and battery pack weight, or it can be arranged continuously along the entire length of the side beam 111 (similar to the structure of the intermediate beam 112) to improve the structural strength of the side beam 111.

[0057] Furthermore, for the intermediate beam 112, battery packs 210 are provided on both sides along the second direction. Therefore, protrusions can be provided on both sides of the intermediate beam 112 that are opposite each other along the second direction to form a U-shape (e.g., ...). Figure 3 and Figure 4 The cross-sectional structures, such as the T-shaped (not shown in the figure), can improve the bending stiffness of the intermediate beam 112 and the overall structural strength of the box 100 while taking into account the guiding function.

[0058] Furthermore, the guide structure 230 is located on the side of the intermediate beam 112 along the third direction close to the bottom plate 120. That is, the guide structure 230 is located in the bottom area of ​​the intermediate beam 112, forming a convex structure. The guide structure 230 located at the bottom can not only achieve sliding guidance with the movable end plate 220, but also connect with the bottom plate 120, thereby increasing the contact area between the intermediate beam 112 and the bottom plate 120, and further improving the structural strength and protection capability of the box 100.

[0059] Furthermore, the guide structure 230 is integrally formed with the intermediate beam 112 and manufactured through a single stamping or extrusion process, which reduces the steps of welding or screwing the guide structure 230 to the intermediate beam 112 and improves the assembly efficiency of the battery pack.

[0060] In some embodiments, the intermediate beam 112 may not be provided inside the housing 100. Each battery module 200 is located between two side beams 111, and a guide structure 230 is provided on the side of the side beam 111 facing the battery module 200. The guide structure 230 is a protrusion, and the mating structure 240 is a groove adapted to the protrusion. Further, the protrusion may also extend along the first direction to both ends of the side beam 111 to strengthen the structural strength of the side beam 111. In some embodiments, the guide structure 230 may be provided on the base plate 120. Exemplarily (not shown in the figure), the guide structure 230 is a guide rail, provided on the base plate 120 and extending along the first direction, and the mating structure 240 is a groove, provided at the bottom of the movable end plate 220. The guide rail passes through the groove of the movable end plate 220 to achieve movement guidance. Alternatively, the guide structure 230 can be a groove, which is set on the base plate 120 and extends along the first direction; the mating structure 240 is a protrusion connected to the bottom of the movable end plate 220, and the slider is embedded in the groove, thereby also realizing the movement guidance; or, the mating structure 240 is a through hole that passes through the movable end plate 220 along the first direction, and the guide structure 230 can be a long strip structure such as a guide rod, which passes through the through hole, and the two ends of the guide rod are indirectly or directly fixed to the housing 100, thereby realizing the movement guidance of the movable end plate 220 along the first direction.

[0061] In some embodiments, such as Figure 5 As shown, if the battery module 200 includes a battery pack 210 and a movable end plate 220, the movable end plate 220 is disposed at one end of the battery pack 210 along a first direction. The battery module 200 also includes an elastic element 250 and a first fixed end plate 260, the first fixed end plate 260 and the movable end plate 220 are disposed at the same end of the battery pack 210 and spaced apart along the first direction, and the elastic element 250 is located between the first fixed end plate 260 and the movable end plate 220. Thus, when the battery pack 210 undergoes thermal expansion, the movable end plate 220 is driven to move toward the first fixed end plate 260 and compress the elastic element 250. The battery module 200 also includes a second fixed end plate 270, the second fixed end plate 270 and the first fixed end plate 260 are disposed at different ends of the battery pack 210 along the first direction. The second fixed end plate 270 is fixedly connected to the housing 100 and abuts against the end of the battery pack 210. The second fixed end plate 270 and the first fixed end plate 260 are disposed at different ends of the battery pack 210 along the first direction, forming the rigid boundary of the battery module 200. Thus, during the expansion process, one end of the battery pack 210 is limited by the second fixed end plate 270, while the other end absorbs the expansion displacement through the deformation of the movable end plate 220 and the elastic member 250.

[0062] It should be noted that, in order to prevent the expansion stress within the battery module 200 from being transmitted to the housing 100 or adjacent battery modules 200, each battery module 200 is also provided with a connector 280 to achieve overall connection of the battery modules 200. The connector 280 extends along the first direction, with one end connected to the first fixed end plate 260 and the other end connected to the second fixed end plate 270, so as to connect the battery modules 200 into an integrated structure. The connector 280 can be a metal strip such as a steel strip, with both ends fastened to the fixed end plates on both sides by welding, screwing, snap-fitting, etc.; it can also be a flexible strap, wrapped around the outside of the entire battery module 200 to achieve connection constraint between the first fixed end plate 260 and the second fixed end plate 270.

[0063] Furthermore, the guide structure 230 can be used as a connector 280, achieving both constraint and guidance functions. (See reference) Figure 5 The guide structure 230 passes through the through hole of the movable end plate 220 and is rigidly connected to the first and second fixed end plates 270 at both ends, thereby constraining the offset of the movable end plate 220 while integrating the battery module 200.

[0064] It should be noted that the reference is... Figure 5 When the guide structure 230 is a flexible strap, in order to ensure the stability of the fit between the flexible strap and the movable end plate 220, a limiting groove matching the strap can be opened at the top or bottom of the movable end plate 220 so that the strap can be embedded therein. Then the limiting groove is closed by the locking member 290 to prevent the movable end plate 220 from slipping during movement.

[0065] In other embodiments, the battery module 200 includes two battery packs 210 spaced apart along a first direction and two movable end plates 220 disposed between the two battery packs 210. The battery module 200 also includes an elastic member 250 and two second fixed end plates 270, both of which are located between the two battery packs 210. The two movable end plates 220 are spaced apart and abut against the ends of their respective battery packs 210. The elastic member 250 is located between the two movable end plates 220, and its two ends along the first direction are connected to the two movable end plates 220, so that when the two battery packs 210 thermally expand, they push the corresponding movable end plates 220 to compress the elastic member 250 towards each other. The two battery packs 210 are both located between the two second fixed end plates 270, which together form the rigid boundary of the battery module 200.

[0066] Correspondingly, in order to achieve the integration of the battery module 200, the battery module 200 is also provided with a connector 280 extending along the first direction, and the two ends of the connector 280 are respectively connected to two second fixed end plates 270.

[0067] Similarly, the guide structure 230 can also serve as the connector 280 of the battery module 200, which has both constraint and guidance functions. After passing through the movable end plate 220, its two ends are connected to the second fixed end plates 270 on both sides.

[0068] The second aspect of this application also proposes a vehicle that includes the battery pack described in any of the foregoing embodiments. It should be noted that the vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck; the vehicle can be a new energy vehicle, such as a hybrid vehicle or a pure electric vehicle. Since the vehicle in this aspect of the embodiment includes the battery pack described in the above embodiments, it possesses all the aforementioned technical effects, which will not be repeated here.

[0069] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery pack, characterized in that, include: Box; A battery module, the battery module including a battery pack and a movable end plate, the battery pack including a plurality of individual cells arranged along a first direction; The movable end plate is disposed at at least one end of the battery pack and abuts against the battery pack. The movable end plate is slidably disposed in the housing and moves along the first direction as the battery pack expands or contracts. The battery module further includes a guide structure extending along the first direction. The guide structure is disposed in the housing. The movable end plate is provided with a mating structure that is slidably connected to the guide structure to guide the movement of the movable end plate.

2. The battery pack according to claim 1, characterized in that, The housing includes a base plate and a beam protruding from the base plate along a third direction. The battery module is provided with the beam on at least one side along a second direction. The beam is provided with the guide structure. The first direction, the second direction and the third direction intersect each other.

3. The battery pack according to claim 2, characterized in that, The battery pack includes a plurality of battery modules arranged along the second direction. The beam includes two side beams and at least one intermediate beam. The intermediate beam and the battery modules are both located between the two side beams. The intermediate beam is used to separate two adjacent battery modules. The intermediate beam is provided with a guide structure on at least one side along the second direction. The guide structure is a protrusion that extends along the first direction to both ends of the intermediate beam. The mating structure is a groove that matches the protrusion.

4. The battery pack according to claim 3, characterized in that, The guide structure is located on the side of the intermediate beam along the third direction near the base plate and is connected to the base plate.

5. The battery pack according to claim 2, characterized in that, The beam includes two side beams, and the battery modules are located between the two side beams; The guide structure is provided on the side of the side beam facing the battery module. The guide structure is a protrusion, and the mating structure is a groove that matches the protrusion.

6. The battery pack according to claim 1, characterized in that, The housing includes a base plate, and the guide structure is disposed on the base plate.

7. The battery pack according to claim 1, characterized in that, The mating structure is a sliding groove, the guiding structure is a guide rail, and the guide rail passes through the sliding groove; Alternatively, the mating structure is a slider, the guiding structure is a groove, and the slider is embedded in the groove; Alternatively, the mating structure is a through hole, the guiding structure is a guide rod, and the guide rod passes through the through hole.

8. The battery pack according to claim 1, characterized in that, In the same battery module, there is one battery pack and one movable end plate. The battery module also includes an elastic element and a first fixed end plate. The first fixed end plate and the movable end plate are located at the same end of the battery pack and are spaced apart. The elastic element is located between the first fixed end plate and the movable end plate. The battery module also includes a second fixed end plate. The second fixed end plate and the first fixed end plate are located at different ends of the battery pack along the first direction. The battery module further includes a connector extending along the first direction, with its two ends connected to the first fixed end plate and the second fixed end plate, respectively.

9. The battery pack according to claim 1, characterized in that, In the same battery module, there are two battery packs and two movable end plates. The battery module also includes an elastic element and two second fixed end plates. The movable end plates and the elastic element are located between the two battery packs, and the two battery packs are disposed between the two second fixed end plates. The battery module further includes a connector extending along the first direction, with two ends of the connector respectively connected to two second fixed end plates.

10. The battery pack according to claim 8 or 9, characterized in that, The connector is the guide structure.

11. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1 to 10.

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