Battery box and battery assembly

Abstract

The utility model provides a kind of battery box and battery assembly, battery box includes: box ontology;Partition, located in box ontology and the inside of box ontology is separated into multiple installation cavities, installation cavity is used to place battery module;Fixed component, including fixed plate and the installation edge of being arranged in the one side of fixed plate, installation edge is set with the angle of fixed plate, fixed plate is located in the side of partition towards installation cavity, installation edge is fixedly connected with the upper end of partition, and the lower end of fixed plate is connected with partition.The utility model discloses technical scheme, it is convenient to realize the function of fixed component and partition to be fixed, to improve the convenience of connection between fixed component and battery box for installing control system and other fixed parts.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery housing and battery assembly. Background Technology

[0002] The lower housing of the battery pack typically contains a partition that divides the interior into multiple mounting cavities for installing the battery modules. The partition usually houses structures such as a control system, which includes several plastic components. To prevent collisions between the battery modules and the control system during assembly, the battery modules are usually installed first, followed by the control system. Once installed in the mounting cavity, the control system is positioned to the side where the battery modules are located, maintaining a certain distance from them.

[0003] Typically, the control system is first assembled onto a mounting component, which is then installed onto the partition of the lower housing. This arrangement facilitates the overall installation of the control system. Currently, both the upper and lower ends of the mounting component are fixed to the partition with screws. However, after the battery module is assembled into the mounting cavity, the space between the battery module and the partition used to mount the mounting component is limited. Using the aforementioned mounting component design results in a small operating space for installation tools, making it inconvenient to install the screws used to secure the partition and the lower end of the mounting component. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery box and battery assembly to facilitate the connection and fixing of components and partitions.

[0005] To achieve the above objectives, this utility model provides a battery box, comprising: a box body; a partition located inside the box body and dividing the interior of the box body into multiple mounting cavities, the mounting cavities being used to place battery modules; and a fixing component, including a fixing plate and a mounting edge disposed on one side of the fixing plate, the mounting edge being set at an angle to the fixing plate, the fixing plate being located on the side of the partition facing the mounting cavity, the mounting edge being fixedly connected to the upper end of the partition, and the lower end of the fixing plate being snapped into the partition.

[0006] Furthermore, the fixing plate is provided with a snap-fit ​​part, the snap-fit ​​part and the mounting edge are located on the same side of the fixing plate, the partition is provided with a mounting hole, and the snap-fit ​​part includes a snap-fit ​​segment, which snaps into the mounting hole.

[0007] Furthermore, the partition is provided with a clearance cavity, the mounting hole is connected to the clearance cavity, and the snap-fit ​​section is located inside the clearance cavity and abuts against the side wall of the clearance cavity with the mounting hole.

[0008] Furthermore, the partition is a hollow structure with reinforcing ribs inside, which divide the interior of the partition into multiple clearance cavities, at least one of which is connected to the mounting hole.

[0009] Furthermore, the mounting hole is provided through the thickness direction of the partition, and the snap-fit ​​section abuts against the side of the partition away from the fixed plate.

[0010] Furthermore, the snap-fit ​​part also includes a connecting section, one end of which is connected to the fixing plate and the other end of which is connected to the snap-fit ​​section. The connecting section is set at an angle to the fixing plate and the snap-fit ​​section. At least part of the connecting section passes through the mounting hole. Alternatively, the fixing member also includes a guide section, which is connected to the end of the snap-fit ​​section away from the fixing plate. The guide section and the fixing plate are located on opposite sides of the plane where the snap-fit ​​section is located. The guide section and the snap-fit ​​section have an angle A between them, where A is an obtuse angle.

[0011] Furthermore, the battery housing also includes an anti-sway structure, which is located between the fixed plate and the partition to prevent the fixed plate from swaying towards the side closer to the partition.

[0012] Furthermore, the anti-sway structure includes a protrusion provided on the side of the partition facing the fixed plate, the protrusion extending along the length direction of the partition; or, the anti-sway structure includes a plurality of protrusions provided on the side of the partition facing the fixed plate, the plurality of protrusions being spaced apart along the length direction of the partition; or, the anti-sway structure includes a protrusion integrally formed on the fixed plate.

[0013] Furthermore, the fixing component also includes a fastener, one end of which passes through the mounting edge and is threaded to the top of the partition; the side of the fixing plate opposite to the partition is provided with a mounting structure for mounting the component to be fixed; and / or, there are two snap-fit ​​parts, which are respectively provided at both ends of the length direction of the fixing plate.

[0014] According to another aspect of the present invention, a battery assembly is provided, comprising: the aforementioned battery housing, wherein there are multiple battery housings stacked sequentially; a battery module, wherein at least one battery module is disposed in the mounting cavity of each battery housing; and a control system disposed on a fixing plate of a fixing member of each battery housing.

[0015] The technical solution of this utility model facilitates the installation of fixing components within a limited space. Specifically, when assembling battery packs, the battery module can be installed into the mounting cavity first. There is an installation space between the end of the battery module and the corresponding separator. The fixing component, such as the control system, is pre-installed onto the fixing plate to form an integral module. Then, the fixing plate, along with the control system mounted on the fixing plate, is inserted into the mounting space. The lower end of the fixing plate is snapped into the separator, and the mounting edge is fixedly connected to the upper end of the separator. In traditional solutions, the bottom end of the fixing component is connected to the separator using fastening screws. This operation requires auxiliary tools and sufficient operating space. However, after assembling the battery module in the mounting cavity, the operating space is small, making it inconvenient to install the fixing component. In this solution, the bottom end of the fixing plate snaps into the separator, eliminating the need for any fasteners or special installation tools. This solution simplifies the installation process of fixing components and separators, improves the convenience and efficiency of installation, and facilitates the installation of control systems, etc. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the battery box provided in Embodiment 1 of this utility model is shown;

[0018] Figure 2 It shows Figure 1 A partial structural diagram at point A in the middle;

[0019] Figure 3 A structural schematic diagram of the fixing component provided in Embodiment 1 of this utility model is shown;

[0020] Figure 4 A partial structural schematic diagram of the partition provided in Embodiment 1 of this utility model is shown;

[0021] Figure 5 A partial structural cross-sectional view of the battery box provided in Embodiment 1 of this utility model is shown;

[0022] Figure 6 It shows Figure 5 A schematic diagram of the local structure at point B;

[0023] Figure 7 A partial structural cross-sectional view of the battery box provided in Embodiment 2 of this utility model is shown;

[0024] Figure 8 It shows Figure 7 A schematic diagram of the local structure at point C;

[0025] Figure 9 A schematic diagram of the structure of the fixing component provided in Embodiment 2 of this utility model is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. Box body; 101. Mounting cavity;

[0028] 20. Partition plate; 201. Mounting hole; 202. Clearance cavity; 21. Reinforcing rib; 22. Bending plate; 221. Fixing hole;

[0029] 30. Fixing component; 31. Fixing plate; 311. Mounting structure; 32. Mounting edge; 33. Snap-fit ​​part; 331. Snap-fit ​​section; 332. Connecting section; 34. Guide section; 35. Fastener;

[0030] 40. Anti-sway structure;

[0031] 01. Control system. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that, in this application and its embodiments, the battery housing has a length direction and a width direction. Wherein, Figure 1 The X direction is the length direction of the battery box, the Y direction is the width direction of the battery box, and the length direction of the partition 20 is the same as the width direction of the battery box.

[0034] like Figures 1 to 6As shown, Embodiment 1 of this utility model provides a battery box. The battery box includes a box body 10, a partition 20, and a fixing member 30. The partition 20 is located inside the box body 10 and divides the interior of the box body 10 into multiple mounting cavities 101 for placing battery modules. The fixing member 30 includes a fixing plate 31 and a mounting edge 32 disposed on one side of the fixing plate 31. The mounting edge 32 is set at an angle to the fixing plate 31. The fixing plate 31 is located on the side of the partition 20 facing the mounting cavity 101. The mounting edge 32 is fixedly connected to the upper end of the partition 20, and the lower end of the fixing plate 31 is snapped into the partition 20. A bending plate 22 is provided at the bottom of the partition 20. The bending plate 22 is perpendicular to the partition 20. A fixing hole 221 is provided on the bending plate 22. When fixing the partition 20 to the bottom plate of the box body 10, screws are passed through the fixing hole 221 and threadedly connected to the bottom plate.

[0035] The technical solution of this utility model facilitates the installation of the fixing component 30 within a limited space. Specifically, when assembling the battery assembly, the battery module can be installed into the mounting cavity 101 first. There is an installation space between the end of the battery module and the corresponding separator 20. The fixing component, such as the control system 01, is pre-installed onto the fixing plate 31 to form an integral module. Then, the fixing plate 31, together with the control system 01 installed on the fixing plate 31, is inserted into the installation space. The lower end of the fixing plate 31 is snapped into the separator 20, and then the mounting edge 32 is fixedly connected to the upper end of the separator 20. In traditional technical solutions, the bottom end of the fixing component needs to be connected to the bottom end of the separator with screws. Since the above operation is performed in a limited installation space and requires auxiliary tools, it is not convenient. Compared with the prior art, which fixes the bottom end of the fixing component to the separator with screws, the bottom end of the fixing plate 31 of this solution is snapped into the separator 20. The snapping process does not require any fasteners or special installation tools. This design simplifies the installation process of the fixing component 30 and the partition 20, improving the convenience and efficiency of their installation. In other words, the solution in this application ensures that the control system and other components are securely mounted on the partition 20 of the battery box via the fixing component, while also ensuring ease of installation of the fixing component.

[0036] Furthermore, in the prior art, in order to ensure that the lower end of the fixing component is fixed to the bending plate by screws, additional mounting holes for screws to pass through need to be made on the bending plate. In order to ensure the structural strength of the bending plate, the width of the bending plate needs to be increased accordingly.

[0037] like Figure 1 and Figure 2As shown, in this solution, only fixing holes 221 are provided on the bending plate 22. Compared with the prior art, this solution can appropriately reduce the width of the bending plate 22 to increase the effective installation space of the mounting cavity 101. That is, under the condition that the size of the box body 10 is the same, the number of battery cells in the battery module of this solution can be appropriately increased to improve the energy density of the battery assembly.

[0038] like Figures 1 to 3 As shown in the embodiment of this solution, the fixing plate 31 and the mounting edge 32 are an integrated structure. This design improves the stability of the connection between the fixing plate 31 and the mounting edge 32. Furthermore, the fixing plate 31 is approximately a rectangular plate structure, and the mounting edge 32 is approximately a rectangular strip structure. The mounting edge 32 abuts against the top surface of the partition 20, and the fixing plate 31 and the partition 20 are approximately parallel.

[0039] This solution does not specify the exact materials of the partition 20 and the mounting edge 32.

[0040] In some embodiments of this solution, metal sheets can be bent to form interconnected partitions 20 and mounting edges 32. In this case, the partitions 20 and mounting edges 32 can be connected by welding. Alternatively, the fixing member 30 may also include fasteners 35, which pass through the mounting edge 32 and are threadedly connected to the top of the partition 20. Multiple fasteners 35 are provided, spaced apart along the length of the mounting edge 32. The multiple fasteners 35 make the fixing member 30 more secure after installation, effectively preventing structural loosening due to external impacts or vibrations.

[0041] In other embodiments of this solution, the partition 20 and the mounting edge 32 are injection molded parts. In this case, the fixing member 30 also includes a fastener 35, which passes through the mounting edge 32 and is threadedly connected to the top end of the partition 20. Multiple fasteners 35 are provided, and the multiple fasteners 35 are spaced apart along the length direction of the mounting edge 32.

[0042] Understandably, the multiple fasteners 35 are spaced apart along the length of the mounting edge 32, resulting in multiple connection points between the mounting edge 32 and the top of the partition 20. Multiple connection points, compared to a single connection point, prevent the mounting edge 32 from rotating around a single connection point. In other words, the arrangement of multiple fasteners 35 simultaneously restricts the position of the fixing member 30 relative to the partition 20 in both the height and length directions.

[0043] like Figures 3 to 6As shown, the fixing plate 31 is provided with a snap-fit ​​part 33, which is located on the same side of the fixing plate 31 as the mounting edge 32. The partition plate 20 is provided with a mounting hole 201. The snap-fit ​​part 33 includes a snap-fit ​​section 331, which snaps into the mounting hole 201. This configuration is simple and facilitates the snap-fit ​​connection between the snap-fit ​​part 33 and the partition plate 20.

[0044] Understandably, the snap-fit ​​section 331 passes through the mounting hole 201 and abuts against the wall of the partition 20.

[0045] Specifically, the fixing plate 31 and the snap-fit ​​part 33 are integrated into one structure. This design can improve the stability of the connection between the snap-fit ​​part 33 and the fixing plate 31 as well as the ease of processing.

[0046] In this embodiment, the partition 20 is provided with a clearance cavity 202, and the mounting hole 201 communicates with the clearance cavity 202. The snap-fit ​​section 331 is located inside the clearance cavity 202 and abuts against the side wall of the clearance cavity 202 with the mounting hole 201. The clearance cavity 202 provides a receiving space for the snap-fit ​​section 331, avoiding unnecessary contact between the snap-fit ​​section 331 and other components, and improving the stability of the snap-fit ​​between the two components.

[0047] Furthermore, the partition 20 has a hollow structure, specifically a profile with a hollow cavity. Reinforcing ribs 21 are provided inside the partition 20, dividing the interior of the partition 20 into multiple clearance cavities 202, at least one of which communicates with the mounting hole 201. This design reduces the weight of the partition 20, and the reinforcing ribs 21, acting as internal support structures, enhance the partition 20's resistance to bending and deformation, thereby improving its structural strength. Moreover, this design eliminates the need for additional clearance cavities 202, simplifying the manufacturing process of the partition 20.

[0048] In some other embodiments of this solution, the partition 20 is a plate with a certain thickness. The mounting hole 201 is provided through the thickness direction of the partition 20, and the snap-fit ​​section 331 abuts against the side of the partition 20 away from the fixing plate 31.

[0049] Furthermore, the snap-fit ​​portion 33 also includes a connecting section 332. One end of the connecting section 332 is connected to the fixing plate 31, and the other end is connected to the snap-fit ​​portion 331. The connecting section 332 is set at an angle to the fixing plate 31, and at least a portion of the connecting section 332 passes through the mounting hole 201. The arrangement of the connecting section 332 creates a gap between the snap-fit ​​portion 331 and the fixing plate 31, facilitating the snap-fit ​​portion 331 to engage with the mounting hole 201.

[0050] Specifically, the two ends of the connecting section 332 are respectively connected to the fixing plate 31 and the snap-fit ​​section 331 with a rounded transition. The rounded transition connection can disperse stress concentration, reduce the excessive stress points at the connection between the connecting section 332 and the fixing plate 31 and the connection between the connecting section 332 and the snap-fit ​​section 331, reduce the risk of material fatigue and fracture, and improve structural stability.

[0051] Furthermore, the connecting section 332 abuts against the wall of the mounting hole 201. This arrangement increases the contact points between the snap-fit ​​part 33 and the partition plate 20, improving the stability of the snap-fit ​​between the snap-fit ​​part 33 and the partition plate 20.

[0052] In this embodiment, the end of the snap-fit ​​segment 331 furthest from the connecting segment 332 extends downward. This arrangement facilitates aligning the snap-fit ​​segment 331 with the mounting hole 201 from top to bottom and allowing it to extend through the mounting hole 201 into the clearance cavity 202, thus avoiding interference from the mounting edge 32 on the snap-fit ​​action. Furthermore, this arrangement also facilitates the disassembly of the fixing component 30.

[0053] like Figure 6 As shown in the embodiment of this solution, the fixing component 30 further includes a guide section 34. The guide section 34 is integrally formed and connected to the end of the snap-fit ​​section 331 away from the fixing plate 31. The guide section 34 and the fixing plate 31 are located on opposite sides of the plane where the snap-fit ​​section 331 is located, and there is an included angle A between the guide section 34 and the snap-fit ​​section 331, where A is an obtuse angle. When installing the fixing component 30, the guide section 34 first enters the clearance cavity 202 through the mounting hole 201, guiding the snap-fit ​​section 331 as it extends into the clearance cavity 202, thus improving the smoothness of the snap-fit ​​process.

[0054] It is understandable that after the fixing component 30 is installed in place, the guide section 34 is located below the snap-fit ​​section 331, and the guide section 34 is inclined relative to the plane where the snap-fit ​​section 331 is located. The bottom end of the guide section 34 is inclined to the side away from the wall where the mounting hole 201 is located. Specifically, as shown in the figure... Figure 6 As shown, after the fixing plate 31 and the partition plate 20 are engaged, the lateral distance between the guide section 34 and the wall surface of the partition plate 20 with the mounting hole 201 gradually increases from top to bottom.

[0055] In this embodiment, there are two snap-fit ​​parts 33, and corresponding mounting holes 201 and clearance cavities 202 are also provided in two places. The two snap-fit ​​parts 33 are respectively located at both ends of the length direction of the fixing plate 31. This arrangement provides two snap-fit ​​points between the fixing plate 31 and the partition plate 20, further improving the stability of the snap-fit ​​of the fixing plate 31.

[0056] Furthermore, the two snap-fit ​​parts 33 are located at the same height on the fixing plate 31. This arrangement facilitates the simultaneous insertion of the snap-fit ​​sections 331 of the two snap-fit ​​parts 33 into the corresponding clearance cavities 202.

[0057] like Figures 4 to 6 As shown, the battery housing also includes an anti-sway structure 40, which is disposed between the fixed plate 31 and the partition 20 to prevent the fixed plate 31 from swaying towards the side closer to the partition 20. The snap-fit ​​part 33 prevents the fixed plate 31 from swaying away from the partition 20. The snap-fit ​​part 33, combined with the anti-sway structure 40, can better restrict the position of the fixed plate 31 in the direction perpendicular to the partition 20, thereby improving the stability of the fixed plate 31.

[0058] like Figure 4 As shown, the anti-sway structure 40 includes a protruding strip disposed on the side of the partition 20 facing the fixed plate 31. The protruding strip and the partition 20 are an integral structure, and the protruding strip extends along the length direction of the partition 20. This arrangement can increase the contact area between the protruding strip and the fixed plate 31, and better prevent the fixed plate 31 from swaying towards the side where the partition 20 is located.

[0059] Optionally, the anti-sway structure 40 includes a plurality of protrusions disposed on the side of the partition 20 facing the fixed plate 31, each protrusion being an integral structure with the partition 20, and the plurality of protrusions being spaced apart along the length direction of the partition 20.

[0060] like Figure 2 , Figure 5 and Figure 6 As shown, fasteners 35 are used to fix the mounting edge 32 to the top of the partition 20, which can limit the height position of the fixing member 30 relative to the partition 20, and also limit the position of the fixing member 30 relative to the partition 20 along the length direction of the partition 20. The surface-to-surface contact between the snap-fit ​​section 331 and the inner wall of the partition 20, along with the anti-sway structure 40, prevents the fixing plate 31 from swaying along the partition 20. Figure 5 The battery module can sway left and right (i.e., along its length). This design allows the fixing component 30, which houses the control system 01, to be securely mounted on the partition 20, thereby achieving stable installation of the control system 01 within the battery housing and ensuring a stable connection between the control system 01 and the battery module.

[0061] like Figure 2 and Figure 3 As shown, a mounting structure 311 for mounting the component to be fixed is provided on the side of the fixing plate 31 opposite to the partition plate 20. With this arrangement, the control system 01 and the fixing plate 31 can be assembled using a mechanical structure.

[0062] Optionally, the mounting structure 311 includes multiple mounting rods disposed on the fixing plate 31, each mounting rod being perpendicular to the fixing plate 31 and having a threaded structure. Specifically, when installing the control system 01, the control system 01 can be threaded onto each mounting rod, and the control system 01 can be fixed by the engagement of nuts and the threaded structure of the mounting rods.

[0063] Optionally, the mounting structure 311 includes a threaded hole. Specifically, when installing the control system 01, a fixing bolt can be passed through the control system 01 and threaded into the threaded hole.

[0064] With this solution, when installing the fixing component 30 onto the partition 20, firstly, the snap-fit ​​parts 33 on the fixing plate 31 are snapped into the corresponding mounting holes 201, so that the mounting edge 32 overlaps the top surface of the partition 20. Then, one end of each fastener 35 is threaded through the mounting edge 32 and connected to the top of the partition 20.

[0065] like Figures 7 to 9 As shown, Embodiment 2 of this utility model provides a battery housing, which differs from Embodiment 1 in that the anti-sway structure 40 includes multiple protrusions integrally formed on the fixing plate 31. Each protrusion can be formed by stamping the fixing plate 31. This arrangement improves the ease of processing the protrusions.

[0066] In this embodiment, there are two protrusions, located at the two ends of the fixing plate 31 along its length and above the two snap-fit ​​portions 33. The ends of the protrusions that are far apart from each other are flush with the two end faces of the fixing plate 31 along its length. This arrangement can further improve the ease of processing, release the stress on the protrusions, reduce the possibility of protrusion deformation, and improve the structural stability of the protrusions.

[0067] This utility model provides a battery assembly in embodiment three. The battery assembly includes the aforementioned battery housing, battery module, control system 01, and top cover. Multiple battery housings are stacked sequentially. Each battery housing has at least one battery module housed within its mounting cavity 101. The control system 01 is mounted on the fixing plate 31 of the fixing member 30 of each battery housing.

[0068] When assembling the battery pack, the battery module is installed into the mounting cavity 101 in the corresponding battery box. Then, the fixing component 30 with the control system 01 is installed onto the corresponding partition 20. After that, the battery boxes with the battery module and the fixing component 30 are stacked and fixed in sequence. Finally, the top cover is fixed to the opening of the battery box at the end.

[0069] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0070] 1. This solution uses a snap-fit ​​design between the lower end of the fixing plate 31 and the partition plate 20 to facilitate the connection between the lower end of the fixing plate 31 and the partition plate 20 within a small installation space, thereby improving the ease of assembling the fixing component 30.

[0071] 2. This solution does not require screws to fix the bottom end of the fixing plate 31 and the bottom end of the partition plate 20 to the bent plate 22. This reduces the need for additional holes on the bent plate 22, appropriately reduces the width of the bent plate 22, increases the effective installation space of the mounting cavity 101, increases the number of individual cells in the battery module, and improves the energy density of the battery assembly.

[0072] 3. The fixing plate 31, the mounting edge 32, the snap-fit ​​part 33 and the guide section 34 are integrated into one structure, which has strong structural stability.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery housing, characterized in that, include: Box body(10); A partition (20) is located inside the box body (10) and divides the interior of the box body (10) into multiple mounting cavities (101), which are used to place battery modules; The fixing component (30) includes a fixing plate (31) and an mounting edge (32) disposed on one side of the fixing plate (31). The mounting edge (32) is set at an angle to the fixing plate (31). The fixing plate (31) is located on the side of the partition (20) facing the mounting cavity (101). The mounting edge (32) is fixedly connected to the upper end of the partition (20). The lower end of the fixing plate (31) is engaged with the partition (20).

2. The battery housing according to claim 1, characterized in that, The fixing plate (31) is provided with a snap-fit ​​part (33), the snap-fit ​​part (33) and the mounting edge (32) are located on the same side of the fixing plate (31), the partition plate (20) is provided with a mounting hole (201), the snap-fit ​​part (33) includes a snap-fit ​​section (331), the snap-fit ​​section (331) snaps into the mounting hole (201).

3. The battery housing according to claim 2, characterized in that, The partition (20) is provided with a relief cavity (202), the mounting hole (201) communicates with the relief cavity (202), and the snap-fit ​​section (331) is located in the relief cavity (202) and abuts against the side wall of the relief cavity (202) with the mounting hole (201).

4. The battery housing according to claim 3, characterized in that, The partition (20) is a hollow structure, and a reinforcing rib (21) is provided inside the partition (20). The reinforcing rib (21) divides the interior of the partition (20) into a plurality of clearance cavities (202), and at least one of the clearance cavities (202) is connected to the mounting hole (201).

5. The battery housing according to claim 2, characterized in that, The mounting hole (201) is provided through the thickness direction of the partition (20), and the snap-fit ​​section (331) abuts against the side of the partition (20) away from the fixing plate (31).

6. The battery housing according to any one of claims 2 to 5, characterized in that, The snap-fit ​​portion (33) further includes a connecting section (332), one end of which is connected to the fixing plate (31), and the other end is connected to the snap-fit ​​portion (331). The connecting section (332) is set at an angle to the fixing plate (31), and at least a portion of the connecting section (332) passes through the mounting hole (201); or, The fixing component (30) further includes a guide section (34), which is connected to the end of the snap-fit ​​section (331) away from the fixing plate (31). The guide section (34) and the fixing plate (31) are located on opposite sides of the plane where the snap-fit ​​section (331) is located. The guide section (34) and the snap-fit ​​section (331) have an included angle A, which is an obtuse angle.

7. The battery housing according to any one of claims 1 to 5, characterized in that, The battery box also includes an anti-sway structure (40), which is disposed between the fixing plate (31) and the partition (20) to prevent the fixing plate (31) from swaying toward the side closer to the partition (20).

8. The battery housing according to claim 7, characterized in that, The anti-sway structure (40) includes a protruding strip disposed on the side of the partition (20) facing the fixed plate (31), the protruding strip extending along the length direction of the partition (20); or, The anti-sway structure (40) includes a plurality of protrusions disposed on the side of the partition (20) facing the fixed plate (31), and the plurality of protrusions are spaced apart along the length direction of the partition (20); or, The anti-sway structure (40) includes a protrusion integrally formed on the fixed plate (31).

9. The battery housing according to any one of claims 2 to 5, characterized in that, The fixing member (30) further includes a fastener (35), one end of which passes through the mounting edge (32) and is threadedly connected to the top end of the partition plate (20); the fixing plate (31) has a mounting structure (311) for mounting the component to be fixed on the side opposite to the partition plate (20); and / or, There are two snap-fit ​​parts (33), and the two snap-fit ​​parts (33) are respectively disposed at both ends of the length direction of the fixing plate (31).

10. A battery assembly, characterized in that, include: The battery housing according to any one of claims 1 to 9, wherein there are multiple battery housings, and the multiple battery housings are stacked sequentially; The battery module is provided in the mounting cavity (101) of each battery box; The control system (01) is installed on the fixing plate (31) of the fixing member (30) of each of the battery boxes.

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