Battery pack box body, battery pack and vehicle

Abstract

The utility model provides a battery pack box body, a battery pack and a vehicle. The battery pack box body comprises a shell provided with an accommodating groove; the first expansion beam is connected with the shell and arranged in the containing groove, the first expansion beam extends in the first direction so as to divide the containing groove into a first sub-groove and a second sub-groove in the second direction, and the first direction intersects with the second direction; and the position of the first expansion beam in the second direction is adjustable. According to the battery pack box body, the adjustable first expansion beam is arranged, so that the same battery pack box body can be used for producing battery packs with different specifications and configurations so as to meet the requirements of different vehicle types, namely, the quantity, arrangement and the like of the battery cells can be adjusted according to the specific requirements of the vehicle, and the whole battery pack is prevented from being redesigned. Therefore, the production and development cost of the battery pack is reduced, and the economic benefit and the production efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack housing, a battery pack, and a vehicle. Background Technology

[0002] Battery packs are the main power source for new energy vehicles.

[0003] In related technologies, in order to ensure that the size of the cells can match the battery pack housing, different housings need to be designed for different cell stacks. However, designing a separate battery pack housing often requires redesigning the molds, structures, etc., which results in high battery pack development costs and low efficiency. Utility Model Content

[0004] This application provides a battery pack housing, a battery pack, and a vehicle, aiming to improve the problems of high development cost and low efficiency of battery packs.

[0005] The specific technical solution is as follows:

[0006] In a first aspect, this application proposes a battery pack housing. The battery pack housing includes: a shell having a receiving groove; and a first expansion beam connected to the shell and disposed within the receiving groove, wherein the first expansion beam extends along a first direction to divide the receiving groove into a first sub-groove and a second sub-groove along a second direction, the first direction and the second direction intersecting; wherein the position of the first expansion beam in the second direction is adjustable.

[0007] In this application, the position of the first expansion beam in the second direction is adjustable. When the position of the first expansion beam in the second direction changes, the sizes of the first sub-slot and the second sub-slot also change. The first sub-slot is used to accommodate electrical components, and the second sub-slot is used to accommodate battery cells. If the battery pack's capacity design changes, it indicates that the number of battery cells needs to be increased or decreased. In this case, it is not necessary to replace the battery pack housing; only the position of the first expansion beam in the second direction needs to be adjusted so that the size of the second sub-slot can match the corresponding size of the battery cell stack. In other words, by setting an adjustable first expansion beam, battery packs of different specifications and configurations can be produced using the same battery pack housing to meet the needs of different vehicle models. That is, the number and arrangement of battery cells can be adjusted according to the specific needs of the vehicle, avoiding the need to redesign the entire battery pack. This helps to reduce the production and development costs of the battery pack and improve economic efficiency and production efficiency.

[0008] In some embodiments, the housing includes a first side plate and a second side plate disposed opposite to each other; the battery pack housing also includes two adjustment components, one end of the first expansion beam is connected to the first side plate through one of the adjustment components, and the other end of the first expansion beam is connected to the second side plate through the other adjustment component.

[0009] In some embodiments, the first side plate and the second side plate are each provided with a plurality of mounting holes spaced apart along the second direction on the side surface near the receiving groove; the adjustment assembly includes a mounting base and a first connector, one end of the mounting base is connected to the first expansion beam, and the other end is connected to the mounting holes through the first connector.

[0010] In some embodiments, the first side plate and the second side plate are each provided with a first guide extending along the second direction on the side surface near the receiving groove; the adjustment assembly includes a second guide and a locking member, one side of the second guide is connected to the first expansion beam, and the other side is movably connected to the first guide along the second direction, and the locking member is connected between the first guide and the second guide to lock or unlock the first guide and the second guide.

[0011] In some embodiments, the housing includes a base plate and a first side plate, a second side plate, a third side plate, and a fourth side plate connected to the base plate. The third side plate is located on the side of the first expansion beam near the first sub-groove. The first side plate, the second side plate, and the fourth side plate are integrally formed. The two ends of the third side plate are detachably connected to the first side plate and the second side plate, respectively.

[0012] In some embodiments, the first side plate, the second side plate, and the third side plate are all hollow side plates. The battery pack housing includes a first fixing member, a second fixing member, a third connecting member, and a fourth connecting member. The first fixing member is fixedly connected to the end of the first side plate away from the fourth side plate. The second fixing member is fixedly connected to the end of the second side plate away from the fourth side plate. One end of the third side plate is connected to the first fixing member through the third connecting member, and the other end is connected to the second fixing member through the fourth connecting member.

[0013] In some embodiments, the battery pack housing further includes a second expansion beam located within the second sub-slot, the second expansion beam and the fourth side plate being integrally formed.

[0014] In some embodiments, one end of the third side plate forms a first corner with the first side plate, and the other end of the third side plate forms a second corner with the second side plate; the battery pack housing further includes a first seal and a second seal, the first seal being disposed on the side surface of the first corner away from the first sub-slot, and the second seal being disposed on the side surface of the second corner away from the first sub-slot.

[0015] Secondly, this application proposes a battery pack, including a battery cell, a battery distribution unit, and the battery pack housing described in the first aspect, wherein the battery cell is disposed in the second sub-slot, and the battery distribution unit is disposed in the first sub-slot.

[0016] Thirdly, this application proposes a vehicle including the battery pack described in the second aspect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a battery pack (with the cover removed) provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of a battery pack housing (without the cover) provided in an embodiment of this application;

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point M;

[0020] Figure 4 This is an exploded structural diagram of a battery pack housing (with the cover removed) provided in an embodiment of this application;

[0021] Figure 5 This is a structural schematic diagram of the fourth side plate and the second expansion beam provided in an embodiment of this application.

[0022] The annotations in the attached figures are explained as follows:

[0023] 1-Battery pack;

[0024] 10 - Battery pack housing, 20 - Battery cells, 30 - Battery distribution unit;

[0025] 100-Housing, 101-Receiving groove, 1011-First sub-groove, 1012-Second sub-groove, 110-First side plate, 120-Second side plate, 130-Mounting hole, 140-Base plate, 150-Third side plate, 160-Fourth side plate, 111-First fixing member, 121-Second fixing member, 151-High pressure interface, 152-Low pressure interface, 153-First corner, 154-Second corner;

[0026] 200 - First expansion beam, 300 - Adjustment assembly, 310 - Mounting base;

[0027] 400 - Second expansion beam, 500 - First seal, 600 - Second seal. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Firstly, this application proposes a battery pack housing 10. For example... Figure 1 and Figure 2 As shown, the battery pack housing 10 includes a shell 100 and a first expansion beam 200. The shell 100 has a receiving groove 101, and the first expansion beam 200 is disposed within the receiving groove 101. The first expansion beam 200 extends along a first direction X to divide the receiving groove 101 into a first sub-groove 1011 and a second sub-groove 1012 along a second direction Y. The first direction X and the second direction Y intersect. The position of the first expansion beam 200 in the second direction Y is adjustable.

[0033] The housing 100 is part of the battery pack housing 10. For example, the housing 100 can be the bottom shell of the battery pack housing 10. Typically, the battery pack housing 10 also includes a cover (not shown in the figure). After the battery is placed in the receiving slot 101, the cover is connected to the housing 100 to seal the receiving slot 101, thereby providing necessary protection and support for the battery and preventing damage from the external environment. The material of the housing 100 can be, for example, aluminum, aluminum alloy, steel, etc.

[0034] The first expansion beam 200 can be a front expansion beam inside the housing 100, and the first direction X can be the width direction of the battery pack housing 10. Here, the front end refers to the end of the battery pack housing 10 installed at the rear of the vehicle near the front of the vehicle, and the rear end refers to the end of the battery pack housing 10 installed at the rear of the vehicle near the rear end of the vehicle.

[0035] The first expansion beam 200 divides the receiving slot 101 into a first sub-slot 1011 and a second sub-slot 1012 in a second direction Y, where the second direction Y can be the length direction of the battery pack housing 10. The first sub-slot 1011 can be used to place electrical components such as battery distribution units (BDUs), and the second sub-slot 1012 can be used to place battery cells 20.

[0036] Optionally, the battery cell 20 can be a blade battery cell, and the number of battery cells 20 can be multiple. Multiple battery cells 20 can first form at least one battery module, and then place the battery module in the second sub-slot 1012; or, multiple battery cells 20 can directly form a battery cell stack, and then place the battery cell stack in the second sub-slot 1012. This application does not limit this.

[0037] Furthermore, in this application, the position of the first expansion beam 200 in the second direction Y is adjustable. When the position of the first expansion beam 200 in the second direction Y changes, the size of the first sub-slot 1011 and the second sub-slot 1012 also change. The first sub-slot 1011 is used to accommodate electrical components, and the second sub-slot 1012 is used to accommodate battery cells 20. If the capacity design of the battery pack 1 changes, it indicates that the number of battery cells 20 needs to be increased or decreased. At this time, it is not necessary to replace the battery pack housing 10; it is only necessary to adjust the position of the first expansion beam 200 in the second direction Y so that the size of the second sub-slot 1012 matches the corresponding size of the battery cells 20. In other words, by setting an adjustable first expansion beam 200, battery packs 1 of different specifications and configurations can be produced using the same battery pack housing 10 to meet the needs of different vehicle models. That is, the number, arrangement, etc. of battery cells 20 can be adjusted according to the specific needs of the vehicle, avoiding the need to redesign the entire battery pack 1. This helps to reduce the production cost of the battery pack 1 and improve economic efficiency and production efficiency. Furthermore, due to the adjustability of the first expansion beam 200, the number and arrangement of the cells 20 in the battery pack 1 can be flexibly adjusted, which also helps to improve the flexibility and applicability of the battery pack 1.

[0038] In some embodiments, such as Figure 2 and Figure 3 As shown, the housing 100 includes a first side plate 110 and a second side plate 120 disposed opposite to each other. The battery pack housing 10 also includes two adjustment components 300. One end of the first expansion beam 200 is connected to the first side plate 110 through one adjustment component 300, and the other end of the first expansion beam 200 is connected to the second side plate 120 through the other adjustment component 300.

[0039] In this embodiment, the first side plate 110 and the second side plate 120 are located on both sides of the extending direction of the first expansion beam 200, and the two ends of the first expansion beam 200 are respectively connected to the first side plate 110 and the second side plate 120 through an adjusting assembly 300. Thus, by changing the connection position of the adjusting assembly 300, the position of the first expansion beam 200 in the second direction Y can be adjusted. This helps to reduce the production cost of the battery pack 1, improve economic efficiency and production efficiency, and also enhances the flexibility and applicability of the battery pack 1.

[0040] In some embodiments, such as Figure 2 and Figure 3As shown, both the first side plate 110 and the second side plate 120 have a plurality of mounting holes 130 spaced apart along the second direction Y on their surfaces near the receiving groove 101. The adjustment assembly 300 includes a mounting base 310 and a first connector (not shown in the figure). One end of the mounting base 310 is connected to the first expansion beam 200, and the other end is connected to the mounting hole 130 through the first connector. The first connector can be a bolt, stud, etc.

[0041] This embodiment proposes one form of position adjustment for the first expansion beam 200 via an adjustment assembly 300. Specifically, multiple mounting holes 130 are arranged at intervals along the second direction Y on the surface of the first side plate 110 and the second side plate 120 near the receiving groove 101. Both ends of the first expansion beam 200 are fixedly connected to mounting seats 310 of an adjustment assembly 300. A first connecting member passes through the mounting seat 310 and is locked in the mounting hole 130. When the first expansion beam 200 needs to be adjusted, the first connecting member is removed from the current mounting hole 130, the first expansion beam 200 is moved to a preset position, and then the first connecting member is locked back into the mounting hole 130 at the preset position. Thus, the position adjustment of the first expansion beam 200 is achieved.

[0042] In other embodiments, the first side plate 110 and the second side plate 120 are each provided with a first guide (not shown in the figure) extending along the second direction Y on the side surface near the receiving groove 101. The adjustment assembly 300 includes a second guide (not shown in the figure) and a locking member (not shown in the figure). One side of the second guide is connected to the first expansion beam 200, and the other side is movably connected to the first guide along the second direction Y. The locking member is connected between the first guide and the second guide to lock or unlock the first guide and the second guide.

[0043] This embodiment proposes another form for adjusting the position of the first expansion beam 200 using the adjusting component 300. Specifically, the first side plate 110 and the second side plate 120 are provided with a first guide extending along the second direction Y on the surface near the receiving groove 101. The first guide can be, for example, a guide rail. Both ends of the first expansion beam 200 are fixedly connected to the second guide of the adjusting component 300, and the other side of the second guide is movably connected to the first guide along the second direction Y. The second guide can be, for example, a slider or a roller. That is, the first expansion beam 200 is connected to the first side plate 110 and the second side plate 120 through the cooperation of the guide rail and the slider or roller. A locking component is provided between the first guide and the second guide to lock or unlock the second guide and the first guide. The locking component can be, for example, a pin or a latch. When the first expansion beam 200 needs to be adjusted, the locking component is unlocked, and then the first expansion beam 200 is moved along the second direction Y to a preset position. After that, the locking component is locked again to prevent the first expansion beam 200 from moving. This allows for the adjustment of the position of the first expansion beam 200.

[0044] It is easy to understand that the first expansion beam 200 can also be made adjustable in position in the second direction Y by other means, and this application does not limit this.

[0045] In some embodiments, such as Figure 2 and Figure 4 As shown, the housing 100 also includes a bottom plate 140, a third side plate 150, and a fourth side plate 160. The first side plate 110, the second side plate 120, the third side plate 150, and the fourth side plate 160, together with the bottom plate 140, form a receiving groove 101. The first side plate 110 and the second side plate 120 are spaced apart along a first direction X, and the third side plate 150 and the fourth side plate 160 are spaced apart along a second direction Y.

[0046] Furthermore, the third side plate 150 is located on the side of the first expansion beam 200 near the first sub-groove 1011. The first side plate 110, the second side plate 120 and the fourth side plate 160 are integrally formed structures. The two ends of the third side plate 150 are detachably connected to the first side plate 110 and the second side plate 120, respectively.

[0047] In this embodiment, the first side plate 110 and the second side plate 120 can be the left and right side frames of the battery pack housing 10, and the third side plate 150 and the fourth side plate 160 can be the front and rear side frames of the battery pack housing 10. In this embodiment, the first side plate 110, the second side plate 120, and the fourth side plate 160 are configured as an integrally formed structure, for example, by injection molding, die casting, stamping, etc., which helps to reduce costs and improve the strength of the housing 100. Furthermore, the third side plate 150 is typically provided with a high-voltage interface 151 and a low-voltage interface 152 for external electrical connection. In this embodiment, the third side plate 150 is configured as a detachable structure, so that the arrangement of the high-voltage and low-voltage interfaces of the battery pack 1 can be changed by disassembling and replacing the third side plate 150, allowing the battery pack 1 to be adapted to different types of vehicles, thereby further improving the versatility and flexibility of the battery pack 1. Furthermore, since only the third side panel 150 needs to be removed to replace the high-voltage interface 151 and the low-voltage interface 152, it also helps to reduce the production cost of the battery pack 1 and improve production efficiency. Moreover, the removability of the third side panel 150 makes the components inside the battery pack housing 10 easier to access without completely disassembling the entire battery pack 1, which also helps to improve the convenience of fault diagnosis and component maintenance and replacement.

[0048] In some embodiments, the battery pack housing 10 includes a third connector (not shown) and a fourth connector (not shown). One end of the third side plate 150 is connected to the end face of the first side plate 110 away from the fourth side plate 160 via the third connector, and the other end is connected to the end face of the second side plate 120 away from the fourth side plate 160 via the fourth connector. The third and fourth connectors can be bolts, studs, etc. By providing the third and fourth connectors, a detachable connection structure for the third side plate 150 can be achieved, which is beneficial to further improve the versatility and flexibility of the battery pack 1, while also helping to reduce the production cost of the battery pack 1, improve production efficiency, and enhance the convenience of fault diagnosis and component maintenance and replacement.

[0049] In some embodiments, such as Figure 2 and Figure 4 As shown, the first side plate 110, the second side plate 120 and the third side plate 150 are all hollow side plates. The battery pack housing 10 also includes a first fixing member 111 and a second fixing member 121. The first fixing member 111 is fixedly connected to the end of the first side plate 110 away from the fourth side plate 160. The second fixing member 121 is fixedly connected to the end of the second side plate 120 away from the fourth side plate 160. One end of the third side plate 150 is connected to the first fixing member 111 through a third connector, and the other end is connected to the second fixing member 121 through a fourth connector.

[0050] In this embodiment, the first side plate 110, the second side plate 120, and the third side plate 150 are all hollow side plates. Therefore, firstly, the weight of the battery pack housing 10 can be reduced, thereby increasing the energy density of the battery pack 1. Secondly, the cavities of the three plates can serve as heat dissipation channels, smoke exhaust channels, wiring channels, etc., which helps to improve the space utilization and safety of the battery pack housing 10. Optionally, the first expansion beam 200 can also be a hollow beam, which can further reduce the weight of the battery pack housing 10 and improve its space utilization and safety.

[0051] Furthermore, since the above are all hollow side panels, in order to improve the convenience of connection, the battery pack housing 10 of this embodiment is also provided with a first fixing member 111 and a second fixing member 121. The first fixing member 111 can be fixedly connected to the opening at the end of the first side panel 110 away from the fourth side panel 160 by welding. The second fixing member 121 can be fixedly connected to the opening at the end of the second side panel 120 away from the fourth side panel 160 by welding. Then, the two ends of the third side panel 150 are respectively connected to the first side panel 110 and the second side panel 120 through the third connector and the fourth connector, respectively. This is beneficial to further improve the versatility and flexibility of the battery pack 1, and at the same time, it is also beneficial to reduce the production cost of the battery pack 1, improve production efficiency, and improve the convenience of fault diagnosis and component maintenance and replacement.

[0052] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the battery pack housing 10 also includes a second expansion beam 400 located within the second sub-slot 1012. The second expansion beam 400 and the fourth side plate 160 are integrally formed. The second expansion beam 400 can be the rear expansion beam of the battery pack 1. When the battery cell 20 is installed in the second sub-slot 1012, the first expansion beam 200 and the second expansion beam 400 can limit the battery cell 20, which can improve the strength and structural stability of the housing 100 on the one hand, and absorb the expansion force of the battery cell 20 during operation on the other hand. In this embodiment, the second expansion beam 400 and the fourth side plate 160 are integrally formed, which is beneficial to further improve the structural strength of the housing 100 and reduce the manufacturing cost of the housing 100.

[0053] Optionally, the second expansion beam 400 and the fourth side plate 160 may also be hollow structures, which can further reduce the weight of the battery pack housing 10 and improve the space utilization and safety of the battery pack housing 10.

[0054] In some embodiments, such as Figure 2 and Figure 4As shown, one end of the third side plate 150 forms a first corner 153 with the first side plate 110, and the other end of the third side plate 150 forms a second corner 154 with the second side plate 120. The battery pack housing 10 also includes a first sealing member 500 and a second sealing member 600. The first sealing member 500 is disposed on the side surface of the first corner 153 facing away from the first sub-groove 1011, and the second sealing member 600 is disposed on the side surface of the second corner 154 facing away from the first sub-groove 1011.

[0055] When the third side plate 150 is connected to the first side plate 110 and the second side plate 120 respectively, a first corner portion 153 is formed at the connection between the third side plate 150 and the first side plate 110, and a second corner portion 154 is formed at the connection between the third side plate 150 and the second side plate 120. This embodiment also includes a first sealing member 500 and a second sealing member 600, which can be L-shaped. The first sealing member 500 is connected to the surface of the first corner portion 153 facing away from the first sub-groove 1011, so that the first sealing member 500 can seal the gap between the first side plate 110 and the third side plate 150. The second sealing member 600 is connected to the surface of the second corner portion 154 facing away from the first sub-groove 1011, so that the second sealing member 600 can seal the gap between the second side plate 120 and the third side plate 150. This helps improve the sealing performance of the battery pack housing 10, prevents the internal components of the battery pack housing 10 from being interfered with and damaged by the external environment, and thus helps improve the service life and safety of the battery pack 1.

[0056] Optionally, in some embodiments, a first adhesive layer (not shown in the figure) is further provided between the third side plate 150 and the first fixing member 111, and a second adhesive layer (not shown in the figure) is further provided between the third side plate 150 and the second fixing member 121. This helps to improve the reliability of the connection of the third side plate 150 while further improving the sealing performance of the battery pack housing 10.

[0057] Secondly, this application proposes a battery pack 1. For example... Figure 1 As shown, the battery pack 1 includes battery cells 20, a battery distribution unit 30, and a battery pack housing 10 as described in the first aspect. The battery cells 20 are disposed in the second sub-slot 1012, and the battery distribution unit 30 is disposed in the first sub-slot 1011. The battery pack 1 of this application uses the battery pack housing 10 described in the first aspect, which helps to reduce the production cost of the battery pack 1 and improve economic efficiency and production efficiency. In addition, due to the adjustability of the first expansion beam 200, the number and arrangement of the battery cells 20 in the battery pack 1 can be flexibly adjusted, which also helps to improve the flexibility and applicability of the battery pack 1.

[0058] Thirdly, this application proposes a vehicle including the battery pack 1 described in the second aspect. This helps to reduce the production cost of the vehicle and improve economic efficiency and production efficiency. The vehicle can be a hybrid vehicle, an electric vehicle, etc.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery pack housing, characterized in that, include: The casing is provided with a receiving groove; A first expansion beam is connected to the shell and disposed in the receiving groove. The first expansion beam extends along a first direction to divide the receiving groove into a first sub-groove and a second sub-groove along a second direction. The first direction and the second direction intersect. The position of the first expansion beam in the second direction is adjustable.

2. The battery pack housing according to claim 1, characterized in that, The housing includes a first side plate and a second side plate disposed opposite to each other; The battery pack housing also includes two adjustment components. One end of the first expansion beam is connected to the first side plate through one of the adjustment components, and the other end of the first expansion beam is connected to the second side plate through the other adjustment component.

3. The battery pack housing according to claim 2, characterized in that, Both the first side plate and the second side plate have a plurality of mounting holes spaced apart along the second direction on the side surface near the receiving groove. The adjustment assembly includes a mounting base and a first connector. One end of the mounting base is connected to the first expansion beam, and the other end is connected to the mounting hole through the first connector.

4. The battery pack housing according to claim 2, characterized in that, Both the first side plate and the second side plate are provided with a first guide extending along the second direction on the side surface near the receiving groove; The adjustment assembly includes a second guide and a locking member. One side of the second guide is connected to the first expansion beam, and the other side is movably connected to the first guide along the second direction. The locking member is connected between the first guide and the second guide to lock or unlock the first guide and the second guide.

5. The battery pack housing according to claim 1, characterized in that, The housing includes a bottom plate and a first side plate, a second side plate, a third side plate and a fourth side plate connected to the bottom plate, wherein the third side plate is located on the side of the first expansion beam near the first sub-groove; The first side plate, the second side plate, and the fourth side plate are integrally formed, and the two ends of the third side plate are detachably connected to the first side plate and the second side plate, respectively.

6. The battery pack housing according to claim 5, characterized in that, The first side plate, the second side plate, and the third side plate are all hollow side plates; The battery pack housing includes a first fixing member, a second fixing member, a third connecting member, and a fourth connecting member. The first fixing member is fixedly connected to the end of the first side plate away from the fourth side plate. The second fixing member is fixedly connected to the end of the second side plate away from the fourth side plate. One end of the third side plate is connected to the first fixing member through the third connecting member, and the other end is connected to the second fixing member through the fourth connecting member.

7. The battery pack housing according to claim 5, characterized in that, The battery pack housing also includes a second expansion beam located in the second sub-slot, and the second expansion beam and the fourth side plate are integrally formed.

8. The battery pack housing according to claim 5, characterized in that, One end of the third side plate forms a first corner with the first side plate, and the other end of the third side plate forms a second corner with the second side plate; The battery pack housing also includes a first seal and a second seal. The first seal is located on the surface of the first corner away from the first sub-slot, and the second seal is located on the surface of the second corner away from the first sub-slot.

9. A battery pack, characterized in that, It includes a battery cell, a battery distribution unit, and a battery pack housing as described in any one of claims 1-8, wherein the battery cell is disposed in the second sub-slot and the battery distribution unit is disposed in the first sub-slot.

10. A vehicle, characterized in that, Includes the battery pack as described in claim 9.

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