Battery box and electric device

Abstract

The embodiment of the application discloses a battery box body and an electric device, the battery box body is used for containing battery monomer, and comprises: a bottom plate, which is used for bearing the battery monomer; a side beam, which is fixedly connected to the periphery of the bottom plate, the inside of the side beam forms a first cavity extending along a Y direction, a plurality of first partitions are arranged in the first cavity and spaced apart along a Z direction, and the thickness of the first partitions changes in a gradient along the Z direction; a mounting beam, which is arranged at one end of the side beam away from the bottom plate; a connecting piece, which is connected between the side beam and the mounting beam, the connecting piece comprises a first connecting arm and a second connecting arm extending along the Y direction, and at least the first connecting arm is arranged at an angle with the side beam and the mounting beam; wherein the Y direction is the length direction of the side beam, and the Y direction and the Z direction intersect. The scheme of the application significantly improves the overall strength and rigidity of the side beam, so that the side beam can maintain a stable structure state when subjected to external force impact.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry, the power battery system, as one of its core components, directly affects the performance of the entire vehicle and the user experience in terms of safety and reliability. The battery box, as the main load-bearing and protective structure of the power battery module, is crucially designed, especially the cross-sectional design of the battery box side beams, which directly impacts the mechanical strength, lightweight level, and overall stability of the battery box. However, existing battery box side beam structures still face the following technical bottlenecks: First, regarding impact resistance, the cross-sectional design of traditional side beams often fails to meet the demands of high-strength loads. During vehicle operation, if subjected to external impacts such as collisions or bumps, the side beams are prone to localized deformation or even fracture, leading to structural instability of the battery pack and threatening the safety of the battery modules, thus increasing the risk of thermal runaway. Second, in terms of connection structure optimization, the existing design of the fit between the side beams and mounting connectors (such as lugs and brackets) is inadequate. Uneven stress distribution at the connection points easily leads to stress concentration, which not only reduces structural reliability but may also cause loosening of the connections due to long-term vibration, affecting the overall rigidity and durability of the battery pack. Utility Model Content

[0003] In order to solve the problems of the prior art, this application provides a battery housing and an electrical device to solve one or more technical problems existing in the prior art.

[0004] In a first aspect, this application provides a battery housing for housing individual battery cells, the battery housing comprising: The base plate is used to support the battery cells; A side beam is fixedly connected to the periphery of the base plate. A first cavity extending along the Y direction is formed inside the side beam. Multiple first partitions are spaced apart along the Z direction in the first cavity, and the thickness of the first partitions varies in a gradient along the Z direction. A mounting beam is provided at one end of the side beam facing away from the bottom plate; A connector is provided between the side beam and the mounting beam. The connector includes a first connecting arm and a second connecting arm extending along the Y direction. At least the first connecting arm is angled to the side beam and the mounting beam. Wherein, the Y direction is the length direction of the side beam, and the Y direction intersects with the Z direction.

[0005] In this embodiment, by optimizing the structural design of the side beam and the mounting beam, on the one hand, a first partition is provided in the first cavity formed inside the side beam, and the thickness of the first partition varies in a gradient along the Z direction, forming a stable internal support structure and improving the overall strength and rigidity of the side beam; on the other hand, the connector adopts a split design of a first connecting arm and a second connecting arm, and at least the first connecting arm is arranged at an angle with the side beam and the mounting beam to form a multi-directional force transmission path, which can evenly distribute the load at the connection, reduce stress concentration, avoid local fatigue damage caused by traditional rigid connections, and enhance the cooperative deformation capability between the side beam and the mounting beam, thereby improving the load-bearing capacity and impact resistance of the side beam.

[0006] Furthermore, in this application, along the Z direction, the thickness of the first partition plate that is furthest from the bottom plate is greater than the thickness of the first partition plate that is furthest from the bottom plate; And / or, the thickness of the first partition gradually increases from the end of the side beam near the bottom plate to the end away from the bottom plate.

[0007] In this embodiment of the application, by designing the thickness distribution of the first partition, the overall mechanical performance and stability of the structure are significantly improved. On the other hand, it can effectively resist the expansion force generated by the battery during operation, prevent the frame beam from deforming, and ensure the safety of the battery box.

[0008] Furthermore, in this application, the mounting beam is provided with welding holes, a sleeve is provided in the welding holes, and a washer is provided between the welding holes and the sleeve.

[0009] Furthermore, in this application, a boss is provided in the wall of the welding hole, and a groove is provided at one end of the sleeve facing the welding hole, and the boss and the groove are engaged.

[0010] In this embodiment, a boss is provided in the wall of the welding hole, and a matching groove is opened at the end of the sleeve to form a snap-fit, so as to avoid other components, improve the flatness of the fit between the sleeve and the welding hole, and ensure the stability and reliability of the connection.

[0011] Furthermore, in this application, a second cavity is formed inside the mounting beam, and a second partition is provided inside the second cavity. The boss protrudes along the Z direction on the second partition.

[0012] Furthermore, in this application, at least one of the welding holes is a waist-shaped hole, and one end of the sleeve embedded in the waist-shaped hole is adapted to the shape of the waist-shaped hole.

[0013] In this embodiment, the welding hole is designed as an oblong hole to prevent the sleeve from rotating during the connection process, while also serving a positioning function to ensure the accuracy of the connection.

[0014] Furthermore, in this application, the connector includes at least two first connecting arms, each of which is correspondingly connected to a first partition.

[0015] Furthermore, in this application, the included angle between each of the first connecting arms and the side beam is less than 90°; Each of the first connecting arms has a different angle with the side beam, and the first connecting arm with the smallest angle with the side beam is connected to the first partition with the largest thickness.

[0016] Furthermore, in this application, the battery housing also includes a sealing member, which is at least sealed to one end of the side beam along the Y direction opposite to the direction of travel of the applied electrical equipment.

[0017] In a second aspect, this application provides an electrical device including a battery for power supply, the battery including battery cells and a battery housing as described in any of the first aspects, the battery cells being disposed in the battery housing.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1 This is a schematic diagram of the structure of the battery box provided in some embodiments of this application; Figure 2 This is a schematic structural diagram of a partial structure of the battery housing provided in some embodiments of this application; Figure 3 This is another view of the partial structure of the battery housing provided in some embodiments of this application; Figure 4 This is a schematic diagram of the sleeve structure provided in some embodiments of this application; Figure 5 This is another view of the battery housing provided in some embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 100, Base plate; 200, Side beam; 210, First cavity; 220, First partition plate; 300, Mounting beam; 310, Welding hole; 311, Boss; 320, Sleeve; 321, Groove; 330, Washer; 340, Second cavity; 350, Second partition plate; 400, Connector; 410, First connecting arm; 420, Second connecting arm; 500, Sealing component. Detailed Implementation

[0021] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0022] As described in the background section, traditional side beams often have limitations. First, their cross-sectional design is often insufficient to meet the requirements of high-strength loads. During vehicle operation, if they encounter external forces such as collisions or bumps, the side beams are prone to local deformation or even breakage, leading to structural instability of the battery box and threatening the safety of the battery module, thus increasing the risk of thermal runaway. Second, the existing side beams have shortcomings in their design for cooperating with mounting connectors (such as lugs and brackets). Uneven stress distribution at the connection points can easily lead to stress concentration, which not only reduces structural reliability but may also cause the connection to loosen due to long-term vibration, affecting the overall rigidity and durability of the battery box.

[0023] To address the aforementioned issues, this application proposes a battery box and an electrical device. By optimizing the structural design of the side beam and the mounting beam, on the one hand, a first partition is provided within the first cavity formed inside the side beam, and the thickness of the first partition varies gradually along the Z direction, forming a stable internal support structure and improving the overall strength and rigidity of the side beam. On the other hand, the connector adopts a split design of a first connecting arm and a second connecting arm, and at least the first connecting arm is arranged at an angle with the side beam and the mounting beam, forming a multi-directional force transmission path. This can evenly distribute the load at the connection, reduce stress concentration, avoid local fatigue damage caused by traditional rigid connections, and enhance the cooperative deformation capability between the side beam and the mounting beam, thereby improving the load-bearing capacity and impact resistance of the side beam.

[0024] The solution of this application will now be described in detail with reference to the accompanying drawings and various embodiments.

[0025] Figure 1 This is a schematic diagram of the battery housing structure provided in some embodiments of this application. Figure 2 This is a structural schematic diagram of a portion of the battery housing provided in some embodiments of this application, with reference to... Figure 1 and Figure 2As shown, the battery box includes a base plate 100, side beams 200, mounting beams 300, and connectors 400. The base plate 100 supports the individual battery cells, the side beams 200 are fixedly connected to the periphery of the base plate 100, the mounting beams 300 are located at the end of the side beams 200 facing away from the base plate 100, and the connectors 400 connect the side beams 200 and the mounting beams 300.

[0026] It should be noted that the embodiments of this application do not specifically limit the number of mounting beams 300 and connectors 400, and their number can be set according to actual needs. For example, as an exemplary and not restrictive illustration, the number of mounting beams 300 and connectors 400 is two, and the two mounting beams 300 and connectors 400 are arranged at one end of the two opposite side beams 200 facing away from the bottom plate 100.

[0027] Further reference Figure 2 As shown, a first cavity 210 is formed inside the side beam 200, extending along the Y direction. Multiple layers of first partitions 220 are disposed within the first cavity 210, spaced apart along the Z direction, with a gradient in thickness along the Z direction. The Y direction is the length direction of the side beam 200, and the Y and Z directions intersect. It should be noted that the gradient thickness design of the first partitions 220 in the Z direction enables intelligent distribution of structural strength. For example, when bearing major loads (such as Z-direction impact or pressure), the thicker first partitions 220 provide core support, and the gradually changing thickness transition zone effectively avoids stress concentration, resulting in smoother load transfer and significantly improved overall bending, torsional, and fatigue resistance. Furthermore, the multi-layered first partition 220 divides the single cavity (i.e., the first cavity 210) extending along the Y direction into multiple sub-units, greatly enhancing the rigidity of the side beam 200 in the X and Z directions, preventing instability or distortion of the cavity under complex working conditions, and ensuring the overall stability and geometric integrity of the structure. At the same time, this design avoids using a single thick partition. By precisely allocating materials (gradient thickness) according to actual stress requirements, redundant materials in non-critical areas are removed while ensuring the strength of critical areas, maximizing structural lightweighting and material utilization.

[0028] Further reference Figure 2As shown, the connector 400 includes a first connecting arm 410 and a second connecting arm 420 extending along the Y direction, wherein at least the first connecting arm 410 is angled to the side beam 200 and the mounting beam 300. This arrangement efficiently decomposes the loads (especially vertical and lateral loads) from the mounting beam 300 into axial forces along the connecting arm direction, transmitting them to the side beam 200. This significantly improves the connection stiffness, torsional resistance, and overall structural stability of the node, effectively suppressing vibration and relative displacement. Understandably, the angled design provides a more direct and smoother force transmission path. Compared to a simple right-angle connection, this design avoids abrupt force reversals, thereby significantly reducing stress concentration at the connection root and improving the fatigue strength and long-term reliability of the connector and the main structure (side beam and mounting beam).

[0029] In some specific embodiments, the connector 400 includes at least two first connecting arms 410, each first connecting arm 410 being correspondingly connected to a first partition 220. Further reference... Figure 2 As shown, there are two first connecting arms 410 and one second connecting arm 420. Each first connecting arm 410 is connected to one of the first partitions 220, and the second connecting arm 420 is not connected to the first partition 220.

[0030] In some specific embodiments, the angle between each first connecting arm 410 and the side beam 200 is less than 90°, and the angle between each first connecting arm 410 and the side beam 200 is different. The first connecting arm 410 with the smallest angle to the side beam 200 is connected to the first partition plate 220 with the largest thickness. By setting the angle between all first connecting arms 410 and the side beam 200 to less than 90°, the first connecting arm 410 mainly bears tensile or compressive forces (depending on the load direction), rather than bending moments. This "diagonal brace" design can transfer the load from the first connecting arm 410 to the main load-bearing structure, the side beam 200, in a more direct and efficient manner, greatly reducing harmful bending stress and improving the structural force transmission efficiency. According to the principles of mechanics, the smaller the angle between the first connecting arm 410 and the side beam 200, the higher its efficiency in transmitting loads in the main direction (such as Z-axis impact or gravity), the larger the axial component force, and the higher the requirements for its own strength and stiffness and the connection points. Therefore, the first connecting arm 410 (i.e., the most stressed and critical connecting arm) with the smallest angle to the side beam 200 is connected to the first partition plate 220 (i.e., the support point with the greatest stiffness and strength) with the greatest thickness. This achieves the transfer of the greatest force to the strongest support, ensures the best match between strength and stiffness in the load transfer path, avoids local overload, makes the overall structure more balanced in terms of force, effectively prevents the risk of plastic deformation or instability at the connection point under huge axial force, and ensures the long-term reliability of the connection.

[0031] It should be noted that, in this embodiment, the angle between the first connecting arm 410 and the side beam 200 and the mounting beam 300 can be set according to actual product requirements, and is not specifically limited here. As an illustrative rather than restrictive illustration, the length of the first connecting arm 410 is 50mm, and the inclination angle between one or more first connecting arms 410 and the side beam 200 is 20 degrees.

[0032] In some specific embodiments, along the Z direction, the thickness of the first partition 220 that is furthest from the base plate 100 is greater than the thickness of the first partition 220 that is furthest from the base plate 100.

[0033] In some other specific embodiments, the thickness of the first partition 220 gradually increases from the end of the side beam 200 near the bottom plate 100 to the end away from the bottom plate 100.

[0034] The first diaphragm 220 is designed according to the principle of "thicker at the top and thinner at the bottom," meaning that the first diaphragm 220 is thicker the farther it is from the bottom plate 100 (positive Z-direction) and thinner the closer it is to the bottom plate 100 (negative Z-direction). Thus, when the structure is subjected to vertical loads, the edge beam 200 will undergo bending deformation as a whole, generating bending stresses distributed in a gradient along the Z-direction internally. Typically, the maximum tensile and compressive stresses occur at the top and bottom edges furthest from the neutral axis. This design makes the thickness of the first diaphragm 220 positively correlated with the stress level, placing more material in the high-stress area (the upper part away from the bottom plate 100), significantly improving the bending stiffness and strength of the diaphragm group and even the entire edge beam, avoiding material waste, and achieving a balance between lightweight and high performance. Since the largest load under top impact or pressure is mainly borne by the uppermost first diaphragm 220, thickening the uppermost first diaphragm 200 greatly enhances the local bearing capacity and stability of this critical area, preventing buckling deformation.

[0035] In some specific embodiments, there are three first partitions 220, and the first partitions 220 that are farther away from the base plate 100 (positive Z direction) are thicker. As an exemplary and not restrictive illustration, the thicknesses of the three first partitions 220 are 14 mm, 4 mm, and 3 mm respectively, from the direction away from the base plate 100 to the direction closer to the base plate 100.

[0036] Furthermore, considering the inclined force transmission structure of the side beam, the two upper first partitions 220 (away from the bottom plate 100) are connected to the connector 400 (specifically the first connecting arm 410), while the lower first partition 220 is not connected to the connector 400 (specifically the second connecting arm 420). Therefore, the two upper first partitions 220 are thicker than the lower first partition 220.

[0037] Reference Figure 3 As shown, in some specific embodiments, the mounting beam 300 has welding holes 310, and a sleeve 320 is provided in the welding holes 310. By providing a sleeve 320 on the mounting beam 300, a high-strength, high-precision, wear-resistant, and easy-to-maintain connection interface can be provided for installing and fixing functional components, avoiding direct tapping on the main material of the mounting beam 300 (such as aluminum alloy or high-strength steel). As the main load-bearing structure, the mounting beam 300 is usually made of hard or thin materials, and direct tapping can easily damage the threads, result in insufficient strength, and make replacement difficult. The sleeve 320 (usually made of high-quality alloy steel, bronze, or wear-resistant materials) is specifically optimized for this purpose, providing a more reliable and durable threaded connection. Furthermore, as a replaceable wear-resistant bushing, once its internal threads are worn or damaged, only the sleeve needs to be replaced, resulting in extremely low cost. If the wear occurs on the mounting beam body, on the one hand, it is not easy to replace, and on the other hand, the replacement cost will be relatively high.

[0038] Reference Figure 4 As shown, in some specific embodiments, a washer 330 is provided between the welding hole 310 and the sleeve 320. It should be noted that the washer 330 serves two purposes: firstly, it effectively fills the assembly gap between the welding hole 310 and the sleeve 320, preventing water, dust, corrosive media, etc., from entering the internal cavity of the mounting beam 300, protecting the internal structure from corrosion, and improving environmental durability and safety. Secondly, the washer 330 (usually copper or an elastomer) acts as a stress buffer layer, absorbing welding thermal stress and vibration during operation, reducing the risk of fretting wear. Simultaneously, it compensates for machining and assembly tolerances, ensuring a tight connection.

[0039] Reference Figure 3 and Figure 4 As shown, in some specific embodiments, a boss 311 is provided in the wall of the welding hole 310, and a groove 321 is provided at the end of the sleeve 320 facing the welding hole 310. The boss 311 and the groove 321 are engaged. By providing a boss in the wall of the welding hole and providing a matching groove at the end of the sleeve to form an engaging fit, other components are avoided, improving the circumferential positioning accuracy of the sleeve 320 and the welding hole 310. During welding, the sleeve 320 is easy to self-position when pressed in, preventing rotation during welding. Even if the weld fails, the boss 311 can still provide a shearing surface to prevent the sleeve 320 from rotating or loosening, ensuring the stability and reliability of the connection.

[0040] It should be noted that, in this embodiment, the shape and size of the boss 311 and the groove 321 are not specifically limited, as long as they are compatible to form a snap-fit. As an example rather than a limiting description, the groove 321 can be a rectangular groove with a groove opening width of 10mm and a depth of 5mm.

[0041] Further reference Figure 2 As shown, in some specific embodiments, a second cavity 340 is formed inside the mounting beam 300, and a second partition 350 is disposed inside the second cavity 340. A boss 311 protrudes along the Z direction on the second partition 350. It should be noted that the mounting beam 300, as the core load-bearing structure, is designed with a hollow second cavity 340 inside. Moreover, this second cavity 340 is not a simple through space; a second partition 350 is further disposed inside it to divide the second cavity 340 and strengthen the overall structure. In addition, the boss 311 is formed by protruding upward along the vertical direction (Z direction) with the second partition 350 as the base, so that the boss 311, the second partition 350 and the main body of the mounting beam 300 are integrated into one, forming an integrated support point that is strengthened from the inside.

[0042] In some specific embodiments, the number of second partitions 350 is multiple, and the multiple second partitions 350 divide the second cavity 340 into multiple smaller cavities. As an exemplary and not limiting illustration, the number of second partitions 350 is two, one of which is arranged along the X direction and the other is arranged along the Z direction, and a boss 311 is formed on the second partition 350 arranged along the X direction and protrudes along the Z direction.

[0043] In some specific embodiments, the welding hole 310 is a circular hole, and the cross-section of the end of the sleeve 320 embedded in the welding hole 310 is circular. In other specific embodiments, further refer to... Figure 3 As shown, at least one welding hole 310 is an oblong hole (also known as a waist-shaped hole). Accordingly, since the sleeve 320 needs to be embedded and welded into this oblong hole, the external shape of the end of the sleeve 320 embedded in the oblong hole needs to be machined to match the shape of the oblong hole, so as to match and fit tightly with the inner contour of the oblong hole. That is to say, the cross-section of the end of the sleeve 320 embedded in the oblong hole is no longer circular, but presents an oblong structure with parallel straight lines on both sides and semi-circular arcs at both ends, ensuring that it can be accurately embedded into the hole.

[0044] It should be noted that traditional round hole and round sleeve pairings rely solely on weld strength to resist torque after welding, which may lead to failure under large rotational torques. In contrast, the parallel straight-face structure on both sides of the oblong hole and the matching sleeve 320 end provides a strong mechanical interlocking function, effectively resisting the torsional tendency of the sleeve 320 within the welding hole 310. This fundamentally prevents relative rotation of the sleeve 320 after welding, greatly enhancing the torsional stability and reliability of the connection point. Furthermore, the design of the oblong hole and the matching sleeve 320 end results in a much larger contact area between the sleeve 320 and the hole wall compared to the line contact method of a round hole and a round sleeve. Understandably, this larger contact area provides a longer weld length and a larger weld area, making the welded connection stronger and capable of transmitting greater loads. Simultaneously, the tight fit facilitates positioning and alignment during welding, ensuring assembly accuracy, reducing welding defects caused by excessive gaps, and improving the uniformity and consistency of weld quality.

[0045] Reference Figure 5 As shown, when the battery box is applied to an electric vehicle, in some specific embodiments, the battery box also includes a sealing element 500. The sealing element 500 is at least sealed to one end of the side beam 200 along the Y direction (the direction of travel of the applied electrical equipment). The sealing element 500, sealed to one end of the side beam 200 along the Y direction (the direction of vehicle travel), firstly forms a physical barrier, effectively sealing the opening at the end of the side beam 200 profile. This prevents road surface water, de-icing agents, mud, gravel, and other foreign objects from intruding into the cavity structure inside the side beam (such as the first cavity 210) during vehicle operation. This avoids internal water corrosion, drainage problems caused by debris accumulation, or structural corrosion, significantly reducing the probability of water accumulation or foreign object intrusion, protecting the internal structure of the side beam and its internal wiring harnesses, mounting points, etc., and greatly improving the environmental sealing reliability and long-term durability of the battery system. Secondly, in electric vehicles, the flatness of the chassis has a significant impact on the drag coefficient. The sealing component 500 streamlines or flattens the end of the originally open side beam 200, helping to smooth airflow and reduce turbulence and air resistance generated at the front of the chassis when the vehicle is moving forward, thus contributing positively to improving the vehicle's driving range. Furthermore, the robust connection between the sealing component 500 and the side beam 200 increases the integrity of this local area. Although its primary function is not load-bearing, it improves the rigidity of the edge structure and its resistance to foreign object impacts to a certain extent. Simultaneously, it makes the overall appearance of the battery pack more complete, flat, and aesthetically pleasing.

[0046] Corresponding to the aforementioned battery housing, this application embodiment also provides an electrical device, which includes a battery for power supply. The battery includes individual battery cells and a battery housing as described in any of the preceding claims. The individual battery cells are disposed within the battery housing. Details regarding the battery housing are as described above and will not be repeated here. The electrical device can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.

[0047] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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.

[0051] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery housing for accommodating individual battery cells, characterized in that, The battery housing includes: The base plate (100) is used to support the battery cell; Side beam (200) is fixedly connected to the periphery of the base plate (100). The side beam (200) forms a first cavity (210) extending in the Y direction. Multiple first partitions (220) are spaced apart in the first cavity (210) along the Z direction, and the thickness of the first partitions (220) along the Z direction varies in a gradient. A mounting beam (300) is disposed at one end of the side beam (200) facing away from the base plate (100); A connector (400) is connected between the side beam (200) and the mounting beam (300). The connector (400) includes a first connecting arm (410) and a second connecting arm (420) extending along the Y direction. At least the first connecting arm (410) is angled to the side beam (200) and the mounting beam (300). Wherein, the Y direction is the length direction of the side beam (200), and the Y direction intersects with the Z direction.

2. The battery housing according to claim 1, characterized in that, Along the Z direction, the thickness of the first partition (220) that is furthest from the base plate (100) is greater than the thickness of the first partition (220) that is furthest from the base plate (100); And / or, the thickness of the first partition (220) gradually increases from the end of the side beam (200) near the bottom plate (100) to the end away from the bottom plate (100).

3. The battery housing according to claim 1 or 2, characterized in that, The mounting beam (300) has a welding hole (310), a sleeve (320) is provided in the welding hole (310), and a washer (330) is provided between the welding hole (310) and the sleeve (320).

4. The battery housing according to claim 3, characterized in that, A boss (311) is provided in the wall of the welding hole (310), and a groove (321) is provided at one end of the sleeve (320) facing the welding hole (310). The boss (311) and the groove (321) are engaged.

5. The battery housing according to claim 4, characterized in that, The mounting beam (300) has a second cavity (340) inside, and a second partition (350) is provided inside the second cavity (340). The boss (311) protrudes along the Z direction on the second partition (350).

6. The battery housing according to claim 3, characterized in that, At least one of the welding holes (310) is a waist-shaped hole, and one end of the sleeve (320) embedded in the waist-shaped hole is adapted to the shape of the waist-shaped hole.

7. The battery housing according to claim 1 or 2, characterized in that, The connector (400) includes at least two first connecting arms (410), each of the first connecting arms (410) being connected to a first partition (220).

8. The battery housing according to claim 7, characterized in that, The included angle between each of the first connecting arms (410) and the side beam (200) is less than 90°; Each of the first connecting arms (410) has a different angle with the side beam (200), and the first connecting arm with the smallest angle with the side beam (200) is connected to the first partition (220) with the largest thickness.

9. The battery housing according to claim 1 or 2, characterized in that, The battery housing also includes a sealing element (500), which is at least sealed to one end of the side beam (200) in the Y direction relative to the direction of travel of the applied electrical equipment.

10. An electrical appliance, characterized in that, It includes a battery for power supply, the battery comprising battery cells and a battery housing as described in any one of claims 1 to 9, the battery cells being disposed within the battery housing.

Images