A battery pack shell, a battery pack and an electric device

Abstract

The application provides a battery pack shell, a battery pack and an electric equipment, and relates to the technical field of batteries. The battery pack shell comprises a box body, a cross beam arranged in the box body, a bottom guard plate arranged at the bottom of the box body, and a middle hanging lug. The middle hanging lug comprises a sleeve assembly and a first positioning piece. The sleeve assembly penetrates through the cross beam, and the first positioning piece is connected with the sleeve assembly and used for pressing the bottom guard plate against the box body. An end of the first positioning piece away from the sleeve assembly is embedded in the bottom guard plate, so that the height of the battery pack shell is effectively reduced, the installation space required in the height direction is reduced, and the applicability of the battery pack is improved.

Description

Technical Field

[0001] This application relates to battery technology, and more particularly to a battery pack housing, a battery pack, and an electrical device. Background Technology

[0002] With the rapid development of new energy vehicles, the design of power battery packs faces increasingly greater challenges in terms of spatial arrangement. In order to meet the requirements of low wind resistance and low chassis design of vehicles, while ensuring interior passenger space, the Z-axis (height direction) space of the battery pack has been significantly compressed. However, the battery pack not only needs to accommodate components such as battery cells, liquid cooling system, and electrical components, but also must have sufficient structural strength and sealing.

[0003] For larger battery packs, the central lug structure is a key component to ensure overall strength. However, traditional central lug designs usually require a lot of Z-axis space, making it difficult for the battery pack to meet performance requirements within its extreme dimensions. Utility Model Content

[0004] This application provides a battery pack housing, a battery pack, and an electrical device to solve the problem that traditional center hooks require a lot of Z-axis space, making it difficult for the battery pack to meet performance requirements within its extreme dimensions.

[0005] On one hand, this application provides a battery pack housing, including:

[0006] The box body, with crossbeams installed inside;

[0007] A bottom protective plate, wherein the bottom protective plate is disposed at the bottom of the box body;

[0008] The central hanging ear includes a sleeve assembly and a first positioning member. The sleeve assembly passes through the crossbeam, and the first positioning member is connected to the sleeve assembly. The first positioning member is used to press the bottom guard plate onto the box body.

[0009] The first positioning member is embedded in the bottom protective plate at the end opposite to the sleeve assembly.

[0010] In one possible implementation, the sleeve assembly has a first connecting portion extending between the bottom guard plate and the housing, a first sealing element is provided between the first connecting portion and the bottom guard plate, and a first positioning element is used to press the bottom guard plate against the first connecting portion.

[0011] In one possible implementation, the bottom protective plate is provided with a first mounting hole and a positioning groove, the positioning groove is arranged around the periphery of the first mounting hole, and the positioning groove is recessed toward the housing.

[0012] The first positioning member includes a second connecting part and a limiting part. The second connecting part passes through the first mounting hole and is connected to the sleeve assembly. The limiting part is located in the positioning groove and abuts against the positioning groove.

[0013] In one possible implementation, a liquid cooling plate is further provided between the housing and the bottom protective plate, the first connecting part is located between the liquid cooling plate and the bottom protective plate, and a second sealing element is provided between the first connecting part and the liquid cooling plate.

[0014] In one possible implementation, the sleeve assembly is radially engaged with the crossbeam to limit the relative position of the sleeve assembly and the crossbeam in the radial direction of the sleeve assembly.

[0015] In one possible implementation, the sleeve assembly has a polygonal cross-section in at least a portion of its radial direction, and a second mounting hole is provided on the crossbeam, the shape of which is adapted to the shape of the sleeve assembly.

[0016] In one possible implementation, a lid is also included, which covers the side of the box body opposite to the bottom protective plate;

[0017] The central hanging lug also includes a second positioning element. The sleeve assembly includes a first sleeve and a second sleeve. The first sleeve is connected to the first positioning element, and the second sleeve is threadedly connected to the first sleeve. The second sleeve is pressed against the side of the crossbeam away from the bottom guard plate. The second positioning element is connected to the second sleeve and presses the box cover onto the box body.

[0018] In one possible implementation, the lid portion extends between the second sleeve and the first positioning member, and a third sealing member is provided between the second sleeve and the lid, the third sealing member being used to close the gap between the second sleeve and the lid.

[0019] Secondly, this application provides a battery pack, including a battery module and a battery pack housing as described in any of the first aspects, wherein the battery module is located within the battery pack housing.

[0020] Thirdly, this application provides an electrical device, including an electrical appliance and the battery pack described in the second aspect, wherein the battery pack is used to supply power to the electrical appliance.

[0021] The battery pack housing, battery pack, and electrical equipment provided in this application include a battery pack housing with a casing, a bottom protective plate, and a central mounting lug. The central mounting lug includes a sleeve assembly and a first positioning member. The sleeve assembly passes through the crossbeam of the casing, and the first positioning member is connected to the sleeve assembly. This allows the bottom protective plate to be pressed tightly against the casing, thus limiting the relative position between the bottom protective plate and the casing. At the same time, the end of the first positioning member facing away from the sleeve assembly is embedded in the bottom protective plate and will not be exposed. This ensures that the central mounting lug does not occupy additional space in the height direction of the battery pack housing, thereby reducing the space required for the battery pack housing in the vertical direction and improving the adaptability of the battery pack in different scenarios, especially in scenarios with limited space. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0024] Figure 2 An exploded view of the battery pack provided in an embodiment of this application;

[0025] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0026] Figure 4 A partial cross-sectional view of the battery pack housing provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the first positioning member in the battery pack housing provided in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the first sleeve in the battery pack housing provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Battery module, 100-Box body, 110-Crossbeam, 200-Middle hanging ear, 210-Sleeve assembly, 211-First sleeve, 2111-First connecting section, 2112-Second connecting section, 2113-First connecting part, 212-Second sleeve, 220-First positioning component, 221-Limiting part, 222-Second connecting part, 230-Second positioning component, 240-First sealing component, 250-Second sealing component, 260-Third sealing component, 2270-Fourth sealing component, 300-Bottom protective plate, 310-Positioning groove, 320-First mounting hole, 400-Box cover, 500-Liquid cooling plate.

[0031] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0033] The battery pack housing in this application is mainly used in the design of power battery systems for new energy vehicles, specifically involving the optimization of the connection structure between the battery pack and the vehicle chassis. In the overall vehicle spatial layout, the battery pack needs to be positioned under the chassis, with sufficient vertical space (Z-axis height) above it for the passenger compartment and sufficient ground clearance below. Simultaneously, the battery pack must meet IP67 sealing requirements and be bolted to the chassis frame to ensure structural strength. In compact vehicles (such as urban SUVs and pure electric sedans), the need for Z-axis height compression of the battery pack is particularly urgent, while traditional center-mounted lug structures waste space due to external threaded connectors and anti-rotation structures, making it difficult to meet the extreme size requirements.

[0034] In related technologies, the central lug structure typically uses an external nut and bolt connection, which leads to the following problems:

[0035] Space occupation: External nuts require reserved installation space and occupy the Z-axis height of the battery pack (vertical space), which conflicts with the overall vehicle space compression requirements.

[0036] Insufficient sealing: The seal between the external nut and the battery pack housing is prone to failure due to vibration or assembly errors, resulting in a decrease in the battery pack's dustproof and waterproof performance.

[0037] The anti-rotation structure is complex: In order to prevent rotation between the external nut and the battery pack shell, an anti-rotation design is usually required. Traditional anti-rotation designs (such as clips) require additional space, which further exacerbates the space conflict.

[0038] Poor installation compatibility: Large-sized nuts require large holes, which weakens the structural strength of the bottom guard plate.

[0039] For example, in compact electric vehicles, the Z-axis height of the battery pack needs to be reduced to below 150mm. However, the traditional center lug structure may have an actual height of over 180mm due to the external placement of the nut and the occupation of anti-rotation components, which makes the overall vehicle design unable to meet the requirements.

[0040] In response, this application provides a battery pack housing with a casing, a bottom protective plate, and a central mounting lug. The central mounting lug includes a sleeve assembly and a first positioning member. The sleeve assembly passes through the crossbeam of the casing, and the first positioning member is connected to the sleeve assembly. This allows the bottom protective plate to be pressed tightly against the casing, thus limiting the relative position between the bottom protective plate and the casing. At the same time, the end of the first positioning member facing away from the sleeve assembly is embedded in the bottom protective plate and will not protrude from the bottom protective plate. This ensures that the central mounting lug does not occupy additional space in the height direction of the battery pack housing, thereby reducing the space required for the battery pack housing in the vertical direction and improving the adaptability of the battery pack in different scenarios, especially in scenarios with limited space.

[0041] The battery pack casing can be applied to common battery packs, such as lithium batteries and lithium iron phosphate batteries.

[0042] Meanwhile, electrical equipment using this battery pack includes, but is not limited to, hybrid vehicles, electric vehicles, aerospace equipment, medical equipment, and mechanical engineering equipment.

[0043] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0044] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the figure, this application embodiment provides a battery pack housing, which includes a housing 100, a bottom protective plate 300, and a central hanging lug 200.

[0045] The housing 100 may include a frame, a crossbeam 110, and a longitudinal beam. The frame forms the circumferential support of the housing 100 and connects the cover 400 and the bottom guard plate 300. The crossbeam 110 and the longitudinal beam separate the internal space of the frame, enhance the impact resistance and deformation resistance of the housing 100, and form a placement cavity for storing the battery module 10 in the internal space of the frame.

[0046] The crossbeam 110 typically extends along the width of the frame, and the longitudinal beam typically extends along the length of the frame. The crossbeam 110, longitudinal beam, and frame can all be made of aluminum alloy.

[0047] During assembly, the central mounting lug 200 is used to fix the bottom guard plate 300 to the housing 100, and can also be connected to the vehicle's chassis and other structures to assist in fixing the battery pack housing.

[0048] Specifically, the bottom guard plate 300 is located at the bottom of the housing 100, and the middle hanging ear 200 includes a sleeve assembly 210 and a first positioning member 220. The sleeve assembly 210 passes through the crossbeam 110, and the first positioning member 220 is connected to the sleeve assembly 210 on the side facing the bottom guard plate 300, and presses the bottom guard plate 300 onto the housing 100.

[0049] One or more central lugs 200 can be provided on the crossbeam 110. For example, multiple central lugs 200 can be arranged at intervals along the extension direction of the crossbeam 110. The specific arrangement can be adjusted according to the actual situation.

[0050] For example, the first positioning member 220 and the sleeve assembly 210 are connected by a threaded connection. An internal thread is provided inside the sleeve assembly 210 and an external thread is provided outside the first positioning member 220. The two are directly fixedly connected by the thread.

[0051] It is understandable that the first positioning element 220 and the sleeve assembly 210 can also be connected in other ways, such as welding, snap-fitting and other common methods. This is just an example and not a limitation.

[0052] The first positioning member 220 is embedded in the bottom protective plate 300 at one end away from the sleeve assembly 210. That is, the bottom surface of the first positioning member 220 is located above the bottom surface of the bottom protective plate 300 (the surface away from the housing 100) or flush with the bottom surface of the bottom protective plate 300. This prevents the first positioning member 220 from protruding outward from the bottom protective plate 300, thereby avoiding the first positioning member 220 from occupying extra space in the vertical direction. This reduces the space required for the battery pack housing in the height direction, making the battery pack using this battery pack housing smaller in the height direction and better suited for use in scenarios with limited space in the height direction, such as new energy vehicles.

[0053] Furthermore, in some embodiments of this application, the battery pack housing also includes a cover 400, which is disposed on the top of the housing 100. That is, the cover 400 and the bottom protective plate 300 are respectively disposed on the top and bottom of the housing 100. The cover 400 can close the cavity inside the housing 100 for placing the battery module 10, and the bottom protective plate 300 can protect the housing 100 and the battery module 10 inside the housing 100.

[0054] The middle lug 200 also includes a second positioning element 230, and the sleeve assembly 210 includes a first sleeve 211 and a second sleeve 212. The first sleeve 211 is connected to the first positioning element 220, and the second sleeve 212 is threadedly connected to the first sleeve 211. Of course, the second sleeve 212 can also be connected to the first sleeve 211 by other common methods such as snap-fit ​​or welding.

[0055] For example, the first sleeve 211 passes through the crossbeam 110 and extends partially above the crossbeam 110. The area of ​​the first sleeve 211 extending above the crossbeam 110 is provided with threads. The inner side of the second sleeve 212 is provided with internal threads. The second sleeve 212 is sleeved on the outer side of the first sleeve 211 and is threadedly connected to the first sleeve 211. At the same time, the second sleeve 212 is pressed against the crossbeam 110 at the end adjacent to it.

[0056] To ensure the sealing between the first sleeve 211 and the second sleeve 212, a fourth sealing element 2270 can be added between the first sleeve 211 and the second sleeve 212. The fourth sealing element 2270 is an annular sealing element sleeved on the outside of the first sleeve 211. One, two or more fourth sealing elements 2270 can be provided. When two or more are provided, multi-layer sealing can be performed to further improve the sealing performance.

[0057] It is understandable that the first sleeve 211, the second sleeve 212 and the first positioning member 220 are hollow inside, so as to allow the bolted connection of the central mounting lug 200 to the vehicle chassis and other components used to fix the battery pack.

[0058] The second sleeve 212 is pressed against the side of the crossbeam 110 away from the bottom guard plate 300, that is, pressed against the top of the crossbeam 110. The end of the first sleeve 211 away from the second sleeve 212 is connected to the first positioning member 220. The second positioning member 230 presses the bottom guard plate 300 against the box body 100, thereby fixing the position of the sleeve assembly 210 and the bottom guard plate 300 on the crossbeam 110.

[0059] The second positioning component 230 is connected to the second sleeve 212 and presses the cover 400 onto the box body 100, thereby realizing the connection between the cover 400 and the box body 100 and assembling the battery pack casing.

[0060] For example, a third connecting part may be provided at the end of the second sleeve 212 away from the first sleeve 211. The second positioning member 230 includes a fourth connecting part and a positioning part. The outer diameter of the positioning part is larger than the outer diameter of the fourth connecting part. The fourth connecting part passes through the hole on the box cover 400 and is inserted into the second sleeve 212 and is threadedly connected to the second sleeve 212. The positioning part is pressed on the box cover 400 to position the box cover 400.

[0061] Furthermore, the cover 400 extends between the second sleeve 212 and the first positioning member 220, and a third sealing member 260 is provided between the second sleeve 212 and the cover 400. The third sealing member 260 is used to close the gap between the second sleeve 212 and the cover 400.

[0062] Specifically, the cover 400 extends between the positioning part and the third connecting part, and is clamped by the positioning part and the third connecting part when the fourth connecting part is threadedly connected to the sleeve, thereby effectively limiting its position. At this time, the third seal 260 is pressed between the cover 400 and the third connecting part, achieving a good sealing effect and preventing external dust and water from entering the interior of the battery pack housing.

[0063] For example, an annular groove can be provided on the end face of the third connecting part adjacent to the box cover 400. The annular third sealing member 260 is placed in the annular groove for positioning. Then, the second positioning member 230 is screwed on, so that the second positioning member 230 presses the box cover 400, thereby making the box cover 400 and the third sealing member 260 fit tightly together.

[0064] Furthermore, in some embodiments of this application, the sleeve assembly 210 has a first connecting portion 2113 extending between the bottom guard plate 300 and the housing 100, a first sealing member 240 is provided between the first connecting portion 2113 and the bottom guard plate 300, and a first positioning member 220 is used to press the bottom guard plate 300 onto the first connecting portion 2113.

[0065] For example, the first sleeve 211 includes a cylindrical first connecting section 2111 and a second connecting section 2112. The first connecting section 2111 extends to the top of the crossbeam 110 and connects to the second sleeve 212, while the second connecting section 2112 extends to the bottom of the crossbeam 110 and connects to the first positioning member 220. The outer diameter of the second connecting section 2112 is larger than the outer diameter of the first connecting section 2111, allowing the second connecting section 2112 to be pressed against the bottom of the crossbeam 110 for positioning.

[0066] The second connecting section 2112 is provided with a first connecting part 2113 at one end away from the first connecting section 2111. The first connecting part 2113 is a ring structure that extends outward to the second connecting section 2112. The side of the first connecting part 2113 facing the bottom guard plate 300 is attached to the upper surface of the bottom guard plate 300. The first sealing element 240 is a ring-shaped sealing ring that is clamped between the first connecting part 2113 and the bottom guard plate 300 to seal the gap between them and prevent external impurities and liquids from entering the interior.

[0067] For example, one or more annular grooves may be provided on the side of the first connecting portion 2113 facing the bottom guard plate 300, and the first sealing member 240 is placed in the annular groove and held by the bottom guard plate 300 and the first connecting portion 2113 to seal the gap between the first connecting portion 2113 and the bottom guard plate 300.

[0068] Understandably, multiple first seals 240 can be provided for multiple sealing.

[0069] Further, please see Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments of this application, the bottom guard plate 300 is provided with a first mounting hole 320 and a positioning groove 310. The positioning groove 310 is arranged around the periphery of the first mounting hole 320 and is recessed toward the housing 100.

[0070] The first positioning member 220 includes a second connecting portion 222 and a limiting portion 221. Both the limiting portion 221 and the second connecting portion 222 can be cylindrical, and the outer diameter of the limiting portion 221 is larger than the outer diameter of the second connecting portion 222. The second connecting portion 222 passes through the first mounting hole 320 and connects to the sleeve assembly 210. The limiting portion 221 is located in the positioning groove 310 and abuts against the bottom wall of the positioning groove 310.

[0071] For example, a positioning groove 310 can be formed by stamping on the bottom guard plate 300, and a first mounting hole 320 can be opened in the middle of the positioning groove 310. The first mounting hole 320 is a through hole, and the inner diameter of the first mounting hole 320 is adapted to the outer diameter of the second connecting part 222. The second connecting part 222 is provided with an external thread, and the second connecting section 2112 is provided with an internal thread, so that the second connecting part 222 and the second connecting section 2112 can be threadedly connected.

[0072] In this case, the inner diameter of the first connecting section 2111 can be larger than the inner diameter of the second positioning member 230, so as to increase the size of the through hole inside the second positioning member 230, so that when it is connected to the chassis of the vehicle by bolts, the positioning components such as nuts can be screwed in smoothly.

[0073] Furthermore, in some embodiments of this application, a liquid cooling plate 500 is provided between the housing 100 and the bottom protective plate 300, a first connecting part 2113 is located between the liquid cooling plate 500 and the bottom protective plate 300, and a second sealing member 250 is provided between the first connecting part 2113 and the liquid cooling plate 500.

[0074] The liquid cooling plate 500 is a core heat dissipation component that regulates the temperature of the battery cell through liquid circulation. It contains a microchannel or flow channel design to allow the coolant (such as an aqueous solution of ethylene glycol) to flow evenly, which can quickly remove heat during the charging and discharging of the battery cell and avoid performance degradation or thermal runaway caused by high temperature.

[0075] The top of the first connecting part 2113 is attached to the bottom of the liquid cooling plate 500, and the bottom is attached to the top plate of the bottom protective plate 300. That is, the first connecting part 2113 is clamped between the bottom protective plate 300 and the liquid cooling plate 500. A second sealing element 250 and a first sealing element 240 are respectively provided at the top and bottom of the first connecting part 2113. The second sealing element 250 can seal the gap between the first connecting part 2113 and the liquid cooling plate 500, providing a first sealing effect for the battery pack. The first sealing element 240 can seal the gap between the first connecting part 2113 and the bottom protective plate 300, providing a second sealing effect for the battery pack. This achieves a double seal, effectively preventing external impurities and liquids from entering the battery pack housing, thereby providing better protection for the internal battery module 10 and other electrical components.

[0076] For example, the second seal 250 can also be an annular sealing ring. An annular groove can be opened on the top of the first connecting part 2113, and the second seal 250 can be placed in the annular groove for positioning, and then it abuts against the first connecting part 2113 and the liquid cooling plate 500 to achieve a sealing effect.

[0077] It is understandable that the first seal 240, the second seal 250, the third seal 260 and the fourth seal 2270 can all be made of common materials such as EPDM rubber, fluororubber, and hydrogenated nitrile rubber, as long as they can provide a good sealing effect. The specific choice can be made according to the actual application environment.

[0078] Furthermore, in some embodiments of this application, the sleeve assembly 210 and the crossbeam 110 are matched in a limiting manner along the radial direction of the sleeve assembly 210 to limit the relative position of the sleeve assembly 210 and the crossbeam 110 in the radial direction of the sleeve assembly 210.

[0079] By limiting the fit between the sleeve assembly 210 and the crossbeam 110, the sleeve assembly 210 can be prevented from rotating relative to the crossbeam 110. Thus, when connecting the sleeve assembly 210 with the first positioning member 220 and the second positioning member 230, the rotation of the sleeve assembly 210 can be avoided, improving the convenience of connection.

[0080] For example, the sleeve assembly 210 extends along the height direction (vertical direction) of the crossbeam 110, and the cross section of at least a portion of the sleeve assembly 210 is polygonal along the radial direction. A second mounting hole is provided on the crossbeam 110, and the shape of the second mounting hole is adapted to the shape of the sleeve assembly 210.

[0081] For example, the radial cross-section of the second connecting segment 2112 is circular, but its interior is hollow, similar to a ring. A rectangular surface can be cut on the outside of the second connecting segment 2112, so that the cross-section of the second connecting segment 2112 is polygonal. The area where the rectangular surface of the second connecting segment 2112 is cut is located inside the second mounting hole.

[0082] Specifically, the second mounting hole can be divided into a first hole segment and a second hole segment. The inner diameter of the second hole segment is larger than that of the first hole segment. The first connecting segment 2111 is located inside the first hole segment, and the second connecting segment 2112 is partially located inside the second hole segment. The shape of the second hole segment is adapted to the shape of the second connecting segment 2112, so that the second connecting segment 2112 cannot rotate relative to the second mounting hole, and the two are in a limiting fit.

[0083] It is understandable that the outer cut surface of the second connecting segment 2112 can also be other shapes; the rectangle here is just an example.

[0084] The second connecting segment 2112 can also be directly set to multiple rectangles, pentagons, hexagons and other polygons.

[0085] Of course, it is also possible that the cross-section of a portion of the first connecting segment 2111 is a polygon.

[0086] The second sleeve 212 may also have a rectangular or other shaped cross section added to its outer side to form a limiting fit with the box cover 400 or other components, so as to connect the second positioning member 230 and the second sleeve 212.

[0087] This application also provides a battery pack; please refer to [link / reference]. Figure 1 and Figure 2 As shown, it includes a battery module 10 and a battery pack housing in the above embodiment, with the battery module 10 fixed inside the battery pack housing.

[0088] Understandably, the battery pack also includes electrical components for connection and control, which are also fixed inside the battery pack housing.

[0089] This application also provides an electrical device, including an electrical device and a battery pack as described in the above embodiments, wherein the battery pack is used to supply power to the electrical device.

[0090] It is understandable that electrical equipment includes, but is not limited to, hybrid vehicles, electric vehicles, aerospace equipment, medical equipment, and mechanical engineering equipment.

[0091] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0092] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack housing, characterized in that, include: A housing (100) is provided with a crossbeam (110) inside the housing (100); Bottom guard plate (300), the bottom guard plate (300) is provided at the bottom of the box body (100); A central hanging ear (200) is provided, comprising a sleeve assembly (210) and a first positioning member (220). The sleeve assembly (210) passes through the crossbeam (110), and the first positioning member (220) is connected to the sleeve assembly (210). The first positioning member (220) is used to press the bottom guard plate (300) onto the housing (100). The first positioning member (220) is embedded in the bottom guard plate (300) at the end opposite to the sleeve assembly (210).

2. The battery pack housing according to claim 1, characterized in that, The sleeve assembly (210) has a first connecting portion (2113) extending between the bottom guard plate (300) and the housing (100), a first sealing member (240) is provided between the first connecting portion (2113) and the bottom guard plate (300), and a first positioning member (220) is used to press the bottom guard plate (300) onto the first connecting portion (2113).

3. The battery pack housing according to claim 2, characterized in that, The bottom protective plate (300) is provided with a first mounting hole (320) and a positioning groove (310). The positioning groove (310) is arranged around the periphery of the first mounting hole (320) and is recessed toward the box body (100). The first positioning member (220) includes a second connecting part (222) and a limiting part (221). The second connecting part (222) passes through the first mounting hole (320) and is connected to the sleeve assembly (210). The limiting part (221) is located in the positioning groove (310) and abuts against the positioning groove (310).

4. The battery pack housing according to claim 2, characterized in that, A liquid cooling plate (500) is also provided between the housing (100) and the bottom protective plate (300), the first connecting part (2113) is located between the liquid cooling plate (500) and the bottom protective plate (300), and a second sealing member (250) is provided between the first connecting part (2113) and the liquid cooling plate (500).

5. The battery pack housing according to claim 1, characterized in that, Along the radial direction of the sleeve assembly (210), the sleeve assembly (210) is limited to the crossbeam (110) to restrict the relative position of the sleeve assembly (210) and the crossbeam (110) in the radial direction of the sleeve assembly (210).

6. The battery pack housing according to claim 5, characterized in that, Along the radial direction of the sleeve assembly (210), at least a portion of the cross section of the sleeve assembly (210) is polygonal, and a second mounting hole is provided on the crossbeam (110), the shape of which is adapted to the shape of the sleeve assembly (210).

7. The battery pack housing according to any one of claims 1-6, characterized in that, It also includes a lid (400) which covers the side of the box body (100) away from the bottom guard plate (300); The central hanging ear (200) also includes a second positioning member (230). The sleeve assembly (210) includes a first sleeve (211) and a second sleeve (212). The first sleeve (211) is connected to the first positioning member (220), and the second sleeve (212) is threadedly connected to the first sleeve (211). The second sleeve (212) is pressed against the side of the crossbeam (110) away from the bottom guard plate (300). The second positioning member (230) is connected to the second sleeve (212) and presses the box cover (400) onto the box body (100).

8. The battery pack housing according to claim 7, characterized in that, The box cover (400) extends between the second sleeve (212) and the first positioning member (220), and a third sealing member (260) is provided between the second sleeve (212) and the box cover (400), the third sealing member (260) being used to close the gap between the second sleeve (212) and the box cover (400).

9. A battery pack, characterized in that, It includes a battery module (10) and a battery pack housing as described in any one of claims 1-8, wherein the battery module (10) is located within the battery pack housing.

10. An electrical appliance, characterized in that, It includes an electrical device and the battery pack of claim 9, the battery pack being used to supply power to the electrical device.

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