Box assembly, battery device and electric appliance

Abstract

The application provides a box assembly, a battery device and an electric equipment. The box assembly is suitable for accommodating a battery pack and comprises a first shell and a second shell arranged separately. The second shell is connected to one end of the first shell in a first direction, and the second shell and the first shell are used to enclose an accommodating cavity. The strength of the second shell is different from the strength of the first shell. The application can simultaneously meet the requirements of lightweight, high strength and high reliability.

Description

Technical Field

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

[0002] The battery tray is a major component of the battery pack, primarily used to house and protect the battery pack.

[0003] However, the stress conditions vary in different parts of the battery box. Currently, battery trays are usually formed in one piece using a stamping process, which makes it difficult to simultaneously meet the requirements of lightweight, high strength, and high reliability. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide a housing assembly, a battery device, and an electrical device that can simultaneously meet the requirements of lightweight, high strength, and high reliability.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] A first aspect of this application provides a housing assembly adapted to accommodate a battery pack, the housing assembly including a first housing and a second housing that are separately disposed;

[0007] The second housing is connected to one end of the first housing in a first direction, and the second housing and the first housing are used to enclose a receiving chamber; wherein the strength of the second housing is different from the strength of the first housing.

[0008] In one possible implementation, the strength of the second housing is greater than the strength of the first housing.

[0009] In one possible implementation, the second housing is provided with a lifting structure and a reinforcing area, the reinforcing area surrounding at least a portion of the lifting structure;

[0010] The strength of the reinforced area is greater than the strength of the second shell excluding the reinforced area.

[0011] In one possible implementation, the hoisting structure is disposed at at least one end of the second housing in a second direction, which intersects the first direction.

[0012] In one possible implementation, the second housing includes a flange that extends along the first direction and away from the first housing.

[0013] The hoisting structure is mounted on the flange.

[0014] In one possible implementation, the housing assembly further includes a reinforcing plate; the reinforcing plate is disposed on the flange and surrounds at least a portion of the hoisting structure;

[0015] The reinforcing plate and the flange connected thereto constitute the reinforced area.

[0016] In one possible implementation, the reinforcing plate is also disposed on the side of the second housing opposite to the receiving chamber.

[0017] In one possible implementation, the second housing includes an integrally formed second body and a first bent portion, the first bent portion being disposed at the end of the second body in the second direction and extending toward the first housing, and the flange being connected to the same end of the second body and the first bent portion;

[0018] The reinforcing plate also connects the second body and the first bent portion.

[0019] In one possible implementation, the reinforcing plate includes a reinforcing plate body and a buffer layer stacked together, the buffer layer being disposed between the reinforcing plate body and the second housing. In another possible implementation, the second housing includes a first sub-housing and two second sub-housings, the two second sub-housings being respectively disposed on one side of the first sub-housing in a second direction and connected to the first sub-housing; the strength of the second sub-housings is greater than the strength of the first sub-housing.

[0020] The hoisting structure is disposed on the second sub-shell, and the second sub-shell constitutes the reinforcing zone.

[0021] In one possible implementation, the housing assembly further includes a third housing connected to the other end of the first housing in the first direction, and the second housing, the first housing, and the third housing are used to enclose a receiving chamber.

[0022] In one possible implementation, the second shell overlaps the first shell along the thickness direction of the first shell, and / or the third shell overlaps the first shell, wherein the thickness direction of the first shell is perpendicular to the first direction.

[0023] In one possible implementation, the second housing is spot-welded to the first housing, and a sealant is provided between the second housing and the first housing; and / or

[0024] The third housing is connected to the first housing by spot welding, and a sealant is provided between the third housing and the first housing.

[0025] In one possible implementation, the strength of the first housing is less than or equal to the strength of the third housing.

[0026] In one possible implementation, the thickness of the second housing is greater than the thickness of the third housing, and the thickness of the third housing is greater than the thickness of the first housing.

[0027] In one possible implementation, the first housing includes a first bottom plate and two side plates, the two side plates being respectively connected to both ends of the first bottom plate along a second direction, and forming a first sub-accommodating chamber with the first bottom plate;

[0028] The second housing includes a second body, two first bends and a second bottom plate. The second bottom plate extends toward the first housing and overlaps the first bottom plate. The two first bends are respectively connected to the two ends of the second body in the second direction and overlap the two side plates. The second bottom plate, the second body and the two first bends are connected and enclose to form a second sub-accommodating chamber.

[0029] The third housing includes a third body, two second bends and a third base plate. The third base plate extends toward the first housing and overlaps the first base plate. The two second bends are respectively connected to the two ends of the third body in the second direction and overlap the two side plates. The third base plate, the second body and the two second bends are connected and enclose to form a third sub-accommodating chamber.

[0030] The first direction, the second direction, and the thickness direction of the first housing are perpendicular to each other, and the first sub-accommodating chamber, the second sub-accommodating chamber, and the third sub-accommodating chamber are interconnected to form the accommodating chamber.

[0031] In one possible implementation, the housing assembly further includes a protective layer connected to the surfaces of the first base plate, the second base plate, and the third base plate that are opposite to the receiving chamber.

[0032] A second aspect of this application provides a battery device including the housing assembly described in the first aspect and a battery pack, wherein the battery pack is disposed within a receiving cavity of the housing assembly.

[0033] In one possible implementation, along the first direction, the distance between the battery pack and the inner wall of the third housing of the housing assembly is greater than the distance between the battery pack and the inner wall of the second housing of the housing assembly.

[0034] In one possible implementation, a sealing cap is also included, which is connected to the housing assembly and seals the receiving chamber.

[0035] In one possible implementation, the battery device further includes a distribution box; the distribution box is disposed on the side of the sealing cover opposite to the housing assembly, and the orthographic projection of the distribution box on the housing assembly is adjacent to the second housing of the housing assembly.

[0036] In one possible implementation, the battery pack is connected to the sealing cap via structural adhesive.

[0037] In one possible implementation, the battery device further includes a cold plate disposed within the receiving cavity and located on the side of the battery pack opposite to the sealing cover;

[0038] The cold plate is connected to the battery pack via thermally conductive adhesive.

[0039] A third aspect of this application provides an electrical device, which includes an electrical device and a battery device as described in the second aspect, wherein the battery device is electrically connected to the electrical device and provides electrical energy to the electrical device.

[0040] The housing assembly, battery device, and electrical equipment provided in this application embodiment allow for flexible adjustment of the strength of different areas of the housing assembly by configuring the housing assembly as a spliced ​​structure. This enables synergistic optimization of adjustable local strength, lightweight design, and high reliability. For example, the strength of the second shell can differ from that of the first shell, allowing for targeted enhancement of the strength of specific areas of the housing assembly. Specifically, the strength of either the first or second shell can be increased to prevent deformation or cracking due to excessive local stress, significantly improving the reliability of the housing assembly. Furthermore, while meeting load-bearing requirements, the housing assembly can be lightweight, thereby increasing the energy density of the battery device.

[0041] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the housing assembly, battery device, and electrical equipment provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1Schematic diagram of the structure of the housing assembly provided in the embodiments of this application Figure 1 ;

[0044] Figure 2 for Figure 1 Enlarged view of region A in the middle;

[0045] Figure 3 A top view of the housing assembly provided in an embodiment of this application;

[0046] Figure 4 For along Figure 3 Cross-sectional view along the BB direction;

[0047] Figure 5 for Figure 4 Enlarged view of region C in the middle;

[0048] Figure 6 A schematic diagram of the structure of the second housing provided in an embodiment of this application;

[0049] Figure 7 A top view of the second housing provided in an embodiment of this application;

[0050] Figure 8 For along Figure 7 A cross-sectional view along the DD direction;

[0051] Figure 9 for Figure 8 Enlarged schematic diagram of region E in the middle;

[0052] Figure 10 Schematic diagram of the structure of the housing assembly provided in the embodiments of this application Figure 2 ;

[0053] Figure 11 for Figure 10 Enlarged schematic diagram of region F in the middle;

[0054] Figure 12 A schematic diagram of the structure of the first housing provided in an embodiment of this application;

[0055] Figure 13 A top view of the first housing provided for an embodiment of this application;

[0056] Figure 14 This is a partial exploded view of the battery device provided in an embodiment of this application;

[0057] Figure 15 A side view of a battery device provided in an embodiment of this application.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1: Battery device;

[0060] 10: Enclosure assembly;

[0061] 100: First housing; 110: First base plate; 120: Side plate; 130: Extension;

[0062] 200: Second shell;

[0063] 210: Enhanced Zone;

[0064] 220: First bend;

[0065] 230: Reinforcing plate; 231: Reinforcing plate body; 232: Buffer layer;

[0066] 240: Second base plate; 250: Flanged edge;

[0067] 260: First subshell;

[0068] 270: Second subshell;

[0069] 280: Second Body;

[0070] 290: Lifting structure;

[0071] 300: Third housing; 310: Third body; 320: Second bend; 330: Third base plate;

[0072] 400: Receiving chamber; 20: Battery pack;

[0073] 30: Distribution box; 40: Sealing cover; 50: Cold plate. Detailed Implementation

[0074] As described in the background section, areas of the battery tray subjected to high stress in related technologies are prone to cracking, thereby reducing the service life and safety of the battery tray. This problem arises because current battery trays are typically manufactured using a stamping process. Limited by the stamping process, the material and thickness of all parts of the battery tray are kept consistent, resulting in relatively uniform strength across all locations.

[0075] In actual operating conditions, the stress conditions of different parts of the battery tray vary. To meet the strength requirements of the entire battery device, the design is usually based on the part with the highest stress. This can lead to design redundancy and hinder lightweight design in areas of weak stress on the battery tray, such as the large surface area. On the other hand, it is difficult to reinforce corners or other areas prone to stress concentration. As a result, the battery tray is prone to cracking due to insufficient strength during subsequent vibration tests or use. Therefore, current battery trays cannot simultaneously meet the requirements of lightweight, high strength, and high reliability.

[0076] To address the aforementioned technical problems, this application provides a battery tray, a battery device, and an electrical appliance. By configuring the housing assembly into a spliced ​​structure, the strength of the first or second housing can be specifically increased, preventing deformation or cracking of the first or second housing due to excessive local stress, thus significantly improving the reliability of the housing assembly. Furthermore, while meeting load-bearing requirements, the housing assembly can also be lightweight, increasing the energy density of the battery device.

[0077] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0078] Please refer to Figure 1 and Figure 13 This application provides a housing assembly 10 for housing a battery pack 20 (please refer to...). Figure 15 ), used to provide support for battery pack 20.

[0079] The housing assembly 10 includes a first housing 100 and a second housing 200. The first housing 100 and the second housing 200 are separate components and can be manufactured independently. The second housing 200 is connected to one end of the first housing 100 in a first direction, and the second housing 200 and the first housing 100 together form a receiving chamber 400. The receiving chamber 400 provides accommodating space for the battery pack 20.

[0080] Given that the housing assembly 10 and the battery pack 20 typically form a battery device 1 (see reference) Figure 14 and Figure 15 Furthermore, the battery device 1 can be applied to a vehicle. In this embodiment, the first direction can be determined according to the vehicle's direction of travel; for example, the first direction can be the vehicle's direction of travel, i.e. Figure 1 In the X direction.

[0081] In this embodiment, the strength of the second housing 200 is different from the strength of the first housing 100. For example, the strength of the second housing 200 is greater than the strength of the first housing 100, or it may be less than the strength of the first housing 100.

[0082] In this way, by setting the housing assembly 10 as a spliced ​​structure, the strength of the first shell 100 or the second shell 200 can be increased in a targeted manner to avoid deformation or cracking due to excessive local stress, thus significantly improving the reliability of the housing assembly 10. In addition, while meeting the load-bearing requirements, the housing assembly 10 can also be made lighter, thereby increasing the energy density of the battery device 1.

[0083] It should be noted that the receiving chamber 400 can be a regular shape, for example, the shape of the receiving chamber 400 can be rectangular. The receiving chamber 400 can also be an irregular shape, which can be freely set according to the shape of the battery pack 20.

[0084] It should also be noted that whether to increase the strength of the second housing 200 or the first housing 100 can be determined based on the structure and installation position of the battery device 1.

[0085] In some embodiments, the battery pack 20 is typically located on the side of the housing assembly 10 facing the rear of the vehicle; secondly, the heavier distribution box and lifting lugs are also located at the rear of the vehicle. This results in a greater weight of the battery pack facing the rear of the vehicle, causing a center shift and leading to uneven stress on the housing assembly 10. This embodiment also uses vibration simulation to demonstrate that the stress at the rear of the housing assembly (at the lifting lugs) is significantly greater than the yield strength of the material. Therefore, the rear of the housing assembly 10 has the greatest risk of vibration cracking.

[0086] This embodiment of the application, by configuring the housing assembly 10 as a spliced ​​structure, allows for flexible adjustment of the strength of different areas of the housing assembly 10, achieving synergistic optimization of adjustable local strength, lightweight design, and high reliability. For example, the strength of the second shell 200 is greater than that of the first shell 100. This allows for targeted enhancement of the strength of certain areas of the housing assembly, preventing deformation or cracking due to excessive local stress, and significantly improving the reliability of the housing assembly. Furthermore, the lower strength of the first shell 100 allows for a reduction in the weight of the first shell 100 while still meeting load-bearing requirements, thereby achieving lightweighting of the housing assembly and increasing the energy density of the battery device.

[0087] It should be noted that the strength of the first housing 100 and the second housing 200 in this embodiment can be achieved by changing the materials of both. In some embodiments, the first housing 100 may be made of steel with relatively low strength. For example, while meeting structural strength requirements, lightweight and cost-reducing design are also achieved. The material of the first housing 100 includes, but is not limited to, HC340 / 590DP steel. In addition, HC340 / 590DP steel also has good formability, making it easy to stamp to form the first housing 100.

[0088] The second shell 200 can be made of steel with higher strength and greater thickness. The material of the second shell 200 includes, but is not limited to, high-strength steel HC420 / 780DP.

[0089] It should also be noted that the strength of different regions of the second shell 200 can be the same or different throughout. Please refer to [reference needed]. Figure 2 , Figure 6 and Figure 7 In one possible implementation, the second housing 200 is provided with a lifting structure 290, which can be a lifting lug, to facilitate the lifting of the battery device by the lifting equipment.

[0090] The second housing 200 also includes a reinforcing region 210, which surrounds at least a portion of the lifting structure 290. The strength of the reinforcing region 210 is greater than the strength of the second housing 200 excluding the reinforcing region 210. Thus, through localized reinforcement, the reinforcing region 210 can suppress plastic deformation and even cracking of the lifting structure 290 under load or impact, ensuring the stability of the housing assembly and extending the service life of the housing assembly 10. Furthermore, reinforcement is only applied to critical areas, avoiding overall weight increase or cost increase, achieving a balance between lightweight and high strength. It should be noted that, for ease of description, the reinforcing region 210 can be referred to as... Figure 2 , Figure 6 and Figure 7 The area within the dashed box is defined as reinforcement area 210.

[0091] In one possible implementation, the lifting structure 290 is disposed at at least one end of the second housing 200 in a second direction. The second direction intersects the first direction, for example, the second direction is perpendicular to the first direction. Figure 1 Taking the orientation shown as an example, the first direction is the length direction of the housing assembly 10, that is... Figure 1 The first direction is the X-direction, and the second direction is the width direction of the housing assembly 10, i.e. Figure 1 Center Y direction.

[0092] It should be noted that the number of reinforcing zones 210 must be consistent with the number of hoisting structures 290. For example, when there are two hoisting structures 290, there are also two reinforcing zones 210, with each reinforcing zone 210 surrounding at least a portion of the corresponding hoisting structure 290.

[0093] To facilitate a detailed description of the lifting structure 290 and the reinforcing area 210, the second housing 200 can be further refined. For example, please refer to... Figure 2 , Figure 6 and Figure 7The second housing 200 includes a flange 250, which extends along a first direction and away from the first housing 100; a lifting structure 290 is disposed on the flange 250. Exemplarily, the lifting structure 290 may be disposed on the top surface of the flange 250 or on the bottom surface of the flange 250, which will not be described in detail here.

[0094] In this way, the flange 250 increases the installation area of ​​the hoisting structure 290 and the second shell 200, which can disperse the stress generated during hoisting, effectively avoid structural damage caused by excessive local stress, and greatly improve the reliability and stability of the connection between the hoisting structure 290 and the second shell 200.

[0095] It's important to understand that there are multiple options for forming reinforcement zone 210. For one possible implementation of the reinforcement zone, please refer to... Figure 8 and Figure 9 The second housing 200 also includes a reinforcing plate 230.

[0096] A reinforcing plate 230 is disposed on the flange 250 and surrounds at least part of the lifting structure 290. The reinforcing plate 230 and the flange 250 to which it is connected constitute a reinforced area 210. It should be noted that the relative positional relationship of the reinforcing plate 230 with respect to the flange 250 can be selected in various ways. For example, the reinforcing plate 230 can be connected to the upper surface of the flange 250, or to the lower surface of the flange 250, or towards the inside of the receiving chamber 400.

[0097] In this way, the reinforcing plate 230 increases the strength of the flange 250. Compared with the technical solution of simultaneously increasing the structural strength of the entire second shell 200, this method can achieve weight reduction of the housing assembly 10 while ensuring that the strength requirements are met. Regarding the coverage area of ​​the reinforcing plate 230, it can cover not only the flange 250 but also other locations on the housing assembly 10. In some embodiments, the reinforcing plate 230 is disposed on the side of the second shell 200 opposite to the receiving chamber 400. Thus, expanding the coverage area of ​​the reinforcing plate 230 can further disperse concentrated stress at the connection points, reduce stress abrupt changes, lower the risk of fracture, and improve the overall structural reliability.

[0098] In one possible implementation, please refer to [reference needed]. Figure 6 and Figure 7 The second housing 200 includes an integrally formed second body 280 and a first bent portion 220. For example, the second body 280 and the first bent portion 220 can be formed by injection molding or stamping processes to improve the structural strength of the second housing 200. The first bent portion 220 is disposed at the end of the second body 280 in a second direction and extends toward the first housing 100, so that the second housing 200 forms a U-shaped structure.

[0099] The flange 250 is connected to the same end of the second body 280 and the first bent portion 220. Figure 6 Taking the orientation shown as an example, the flange 250 is connected to the second body 280 and the first bend 220 at the top of the third orientation.

[0100] The reinforcing plate 230 also connects the second body 280 and the first bend 220. In other words, the reinforcing plate 230 simultaneously covers a portion of the flange 250, a portion of the second body 280, and a portion of the first bend 220, and at least covers the connection point between the second body 280 and the first bend 220, i.e., the reinforcing plate 230 is located at the corner of the second shell 200. This is because the corner is usually a stress-concentrated and relatively weak area in the second shell 200. The presence of the reinforcing plate 230 can effectively enhance the strength of this connection point, enabling it to withstand greater external forces and preventing breakage or deformation due to external impact or long-term stress, thereby improving the structural integrity of the entire second shell 200. In addition, the setting of the reinforcing plate 230 can also change the stress distribution at the corner, dispersing the stress concentrated at the corner to the reinforcing plate 230 and the second body 280 and the first bend 220 connected thereto, thereby reducing the local stress level and avoiding damage to the second shell 200 due to stress concentration.

[0101] It should be understood that the reinforcing plate 230 can be a single-layer structure or a multi-layer structure. For example, please refer to... Figure 9 The reinforcing plate 230 includes at least a reinforced plate body 231 and a buffer layer 232 stacked together, with the buffer layer 232 disposed between the reinforced plate body 231 and the second housing 200. The reinforced plate body 231 is welded to the second housing 200 via spot welding, and the buffer layer 232 is disposed between the reinforced plate body 231 and the second housing 200. The buffer layer 232 can cushion the foam. In this way, the cushioning foam can absorb vibration energy, reducing direct damage to the weld points from dynamic loads or impacts, and extending the service life of the first housing 100. Furthermore, the buffer layer 232 forms a flexible transition between the reinforced plate body 231 and the second housing 200, dispersing the localized stress generated by spot welding and preventing microcracks caused by the heat-affected zone of welding.

[0102] For another possible implementation of Enhanced Zone 210, please refer to Figure 10 and Figure 11The second housing 200 includes a first sub-housing 260 and two second sub-housings 270. The two second sub-housings 270 are respectively disposed on one side of the first sub-housing 260 in a second direction and connected to the first sub-housing 260. The strength of each second sub-housing 270 is greater than that of the first sub-housing 260, thus forming a reinforcing zone 210. This allows the second housing 200 to be designed as a split structure. This design enables precise reinforcement of areas of the second housing 200 that experience high stress or have higher structural stability requirements, effectively improving the overall structural strength of the second housing 200, preventing structural damage due to insufficient local strength, and ensuring the stability and reliability of the second housing 200 under various operating conditions.

[0103] In this embodiment, the hoisting structure 290 is disposed on the second sub-shell 270, so that the tensile force, torsion and other forces generated during the hoisting process can be better borne and dispersed by the high-strength second sub-shell 270. This greatly improves the load-bearing capacity of the hoisting structure 290, reduces the risk of structural deformation or damage caused by hoisting operations, and ensures the safety and reliability of the hoisting process.

[0104] In one possible implementation, please refer to Figure 1 , Figure 2 , Figure 11 and Figure 12 The housing assembly 10 also includes a third housing 300, which is disposed on the side of the first housing 100 opposite to the second housing 200 and connected to the first housing 100. Alternatively, the third housing 300 is connected to the other end of the first housing 100 in a first direction, and the first housing 100, the second housing 200 and the third housing 300 are used to enclose the receiving chamber 400.

[0105] Since the first housing 100 and the third housing 300 are both arranged relatively independently from the second housing 200, the strength of the first housing 100 and the third housing 300 can be freely set. For example, the strength of the first housing 100 can be less than or equal to the strength of the third housing 300, and can be freely set according to the application environment of the enclosure assembly 10. For example, when the enclosure assembly 10 is in the area where the third housing 300 is located, where the stress is relatively concentrated, the strength of the third housing 300 can be set to be greater than that of the first housing 100 to withstand greater external impact; while in areas where the stress is relatively small and the structural strength requirement is not high, the strength of the first housing 100 can be less than that of the third housing 300, or even its strength can be appropriately reduced while meeting the basic function.

[0106] It should be noted that this embodiment can not only improve the performance of the housing assembly 10 by increasing its strength, but also by coordinating with its thickness.

[0107] For example, the thickness of the second housing 200 is greater than the thickness of the third housing 300, and the thickness of the third housing 300 is greater than the thickness of the first housing 100.

[0108] For example, the thickness of the second housing 200 is 2mm to 3mm. When the second housing 200 includes a reinforcing plate 230, the sum of the thicknesses of the reinforcing plate 230 and the second housing 200 is 3mm; the thickness of the second housing 200 is 2mm. The thickness of the third housing 300 is 0.5mm to 1.5mm, for example, the thickness of the third housing 300 is 1mm. The thickness of the first housing 100 is 0.5mm to 1.0mm, for example, the thickness of the first housing 100 is 0.8mm.

[0109] This application embodiment increases the thickness of the second shell 200 and the third shell 300, and reduces the thickness of the first shell 100. For the first shell 100 and the front part of the vehicle, which are subjected to less stress, steel with relatively low strength, thinner material and relatively lower cost is used. This solution achieves lightweight and material cost reduction while meeting the structural strength requirements.

[0110] As for the rear part of the vehicle, which is subjected to greater stress, the shift in the center of gravity of the battery unit makes it prone to stress concentration and cracking. Therefore, the stamped parts of the pallet truck rear are made of steel with higher strength and greater thickness.

[0111] In this way, the stamping and welding process of the housing component 10 allows for flexible and targeted reinforcement of various parts of the tray, avoiding the redundant design of using a one-piece stamping to ensure strength. This achieves a good combination of structural strength of the battery device and cost and weight reduction design.

[0112] In one possible implementation, the second housing 200 is spot-welded to the first housing 100 and a sealant is provided between the second housing 200 and the first housing 100; and / or, the third housing 300 is spot-welded to the first housing 100 and a sealant is provided between the third housing 300 and the first housing 100.

[0113] The second housing 200 and / or the third housing 300 are connected to the first housing 100 by spot welding. Spot welding can create local high temperature to melt and bond the metal, producing a strong weld nugget that effectively resists external tensile and shear forces, significantly improving the connection strength between the second housing 200 and / or the third housing 300 and the first housing 100. In addition, spot welding has the advantages of high automation, small welding deformation, and few welding defects.

[0114] Based on the connection of the second housing 200 and / or the third housing 300 to the first housing 100 by spot welding, a sealant is provided between the second housing 200 and the first housing 100, and / or between the third housing 300 and the first housing 100. The sealant can fill the tiny gaps and unevenness that may exist during the spot welding process, forming a continuous and dense sealing layer, effectively preventing the leakage of media such as gas and liquid, and greatly improving the sealing performance of the housing assembly 10.

[0115] In one possible implementation method, please continue to refer to Figure 12 and Figure 13 The first housing 100 includes a first base plate 110 and two side plates 120. The two side plates 120 are located at both ends of the first base plate 110 in a second direction and are connected to the first base plate 110 to form a first sub-accommodating chamber.

[0116] Please continue to refer to this. Figure 6 and Figure 7 The second housing 200 includes a second body 280, two first bends 220, and a second base plate 240. The second base plate 240 extends toward the first housing 100 and overlaps with the first base plate 110. The two first bends 220 are respectively connected to both ends of the second body 280 in a second direction and overlap with the two side plates 120. The second base plate 240, the second body 280, and the two first bends 220 are connected and enclose to form a second sub-accommodating chamber. The second base plate 240 can be fixedly connected to the first base plate 110 and the two side plates 120 by spot welding. In this embodiment, by having the second base plate 240 overlap the first base plate 110 and the two side plates 120, the contact area between the first housing 100 and the second housing 200 can be increased, thereby improving the connection strength between the first housing 100 and the second housing 200.

[0117] The third housing 300 includes a third body 310, two second bends 320, and a third base plate 330. The third base plate 330 extends toward the first housing 100 and overlaps with the first base plate 110. The two second bends 320 are respectively connected to both ends of the third body 310 in a second direction and overlap with the two side plates 120. The third base plate 330, the second body 280, and the two second bends 320 are connected and enclose to form a third sub-accommodating chamber. In this embodiment, by having the third base plate 330 overlap the first base plate 110 and the two side plates 120, the contact area between the first housing 100 and the third housing 300 can be increased, thereby improving the connection strength between the first housing 100 and the third housing 300.

[0118] The first sub-accommodating chamber, the second sub-accommodating chamber, and the third sub-accommodating chamber are interconnected to form an accommodating chamber 400. The first direction, the second direction, and the thickness direction of the first shell 100 are perpendicular to each other.

[0119] Thus, the enclosure assembly 10 includes independently configured first housing 100, second housing 200, and third housing 300, allowing each housing to be individually designed according to different functional requirements, usage scenarios, and installation locations of the enclosure assembly 10. For example, if the enclosure assembly 10 needs to withstand greater pressure in a specific area, the structural strength of the corresponding housing can be strengthened individually; if certain parts have higher requirements for heat dissipation, the heat dissipation design of that housing can be optimized to better meet diverse design needs.

[0120] To facilitate the connection of the first housing 100 with other structures of the battery device, the first housing 100 also includes an extension 130, which is disposed on each side plate 120 and extends in the second direction. Thus, bolt holes can be provided on the extension 130, improving the convenience of connecting the first housing 100 with other components (such as the top cover).

[0121] In one possible implementation, the housing assembly 10 further includes a protective layer (not shown) that is connected to the surfaces of the first base plate 110, the second base plate 240, and the third base plate 330 that are opposite to the receiving chamber 400. The protective layer can be a coated structural adhesive or a sprayed polyvinyl chloride (PVC) coating.

[0122] A protective layer (such as a PVC coating) can cover the tiny pores or cracks on the weld surfaces of the second housing 200 and the first housing 100, as well as the third housing 300 and the first housing 100, reducing the source of corrosion, avoiding the decrease in strength caused by weld corrosion, and thus improving the overall stability of the housing assembly 10.

[0123] It should be noted that the first housing 100 may also be provided with lifting lug holes to facilitate the installation of the lifting structure 290 and thus the lifting of the housing assembly 10. Since the location of the lifting lug holes is usually also a stress concentration area, a reinforcing plate may also be provided on the side of the first housing 100 away from the battery pack and in the area opposite to the lifting lug holes.

[0124] Please refer to Figure 14 and Figure 15 This application also provides a battery device 1, which provides electrical energy to an electrical device. The battery device 1 may include the housing assembly 10 and battery pack 20 described in any of the above embodiments, with the battery pack 20 disposed within the receiving chamber 400 of the housing assembly 10.

[0125] Since the battery device 1 includes the housing assembly 10 described in any of the above embodiments, this embodiment has all the structure and beneficial effects of the housing assembly 10, and will not be described in detail here.

[0126] In one possible implementation, along the first direction, the distance between the battery pack 20 and the inner wall of the third housing 300 of the housing assembly 10 is greater than the distance between the battery pack 20 and the inner wall of the second housing 200 of the housing assembly 10. This allows the center of gravity of the battery device to be shifted towards the second housing 200.

[0127] Please continue to refer to this. Figure 14 The battery device also includes a sealing cover 40, which is connected to the housing assembly 10 and seals the receiving chamber 400. That is, the sealing cover 40 is connected to the end face of the housing assembly 10 opposite to the first bottom plate 110 to seal the receiving chamber 400, which can effectively prevent external dust, moisture and other impurities from entering the receiving chamber 400, thereby protecting the electronic components and battery inside the battery device from damage and extending their service life.

[0128] The battery device also includes a power distribution box 30, which is disposed on the side of the sealing cover 40 away from the housing assembly 10, and the orthographic projection of the power distribution box 30 on the housing assembly 10 is adjacent to the second housing 200 of the housing assembly 10.

[0129] Therefore, the present invention uses stamping and welding processes to manufacture the housing components. The structure can be strengthened or weakened in a targeted manner according to the different stress conditions at each position of the housing components. For example, the strength of the second housing 200 opposite to the distribution box 30 can be improved, so that the battery device can take into account both lightweight and low-cost design and high strength and high reliability design.

[0130] In this embodiment, the battery pack 20 is connected to the sealing cover 40 by structural adhesive. The structural adhesive has high bonding strength, which can firmly connect the battery pack 20 and the sealing cover 40 together, preventing loosening or displacement between the battery pack 20 and the sealing cover 40, ensuring that the battery pack 20 can be stably fixed under the sealing cover 40 under various operating conditions, and ensuring the normal operation of the battery pack 20.

[0131] In addition, the structural adhesive has a certain degree of elasticity and flexibility, which can absorb and buffer these vibration energies, reducing the impact of vibration on the battery cells and electrical connections inside the battery pack 20.

[0132] In one possible implementation, the battery assembly further includes a cold plate 50 disposed within the receiving chamber 400 and located on the side of the battery pack 20 opposite to the sealing cover 40. The cold plate 50 is connected to the battery pack 20 via thermally conductive adhesive.

[0133] In this embodiment, the thermally conductive adhesive can form a uniform thermally conductive layer between the battery pack 20 and the cold plate 50, ensuring that heat can be uniformly transferred from all parts of the battery pack 20 to the cold plate 50. This helps to avoid local overheating inside the battery pack 20, improve the temperature consistency of each battery cell in the battery pack 20, reduce the uneven battery performance caused by temperature differences, and improve the overall performance and stability of the battery pack 20.

[0134] This application also provides an electrical device, including the electrical device and the battery device described in any of the above embodiments. The battery device is connected to the electrical device and is used to provide electrical energy to the electrical device.

[0135] The electrical equipment in this embodiment can be a vehicle, such as a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. Correspondingly, the electrical device can be the vehicle's drive mechanism or its control system. Furthermore, the electrical equipment can also be other energy storage devices, such as an energy storage power station.

[0136] Since the electrical device in this embodiment includes the battery device described in any of the above embodiments, the structure and beneficial effects of the electrical device including the battery device will not be described in detail here.

[0137] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0138] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A housing assembly (10) adapted to accommodate a battery pack (20), characterized in that, It includes a first housing (100) and a second housing (200) that are separately configured; The second housing (200) is connected to one end of the first housing (100) in a first direction, and the second housing (200) and the first housing (100) are used to enclose a receiving chamber (400); wherein the strength of the second housing (200) is different from the strength of the first housing (100).

2. The housing assembly (10) according to claim 1, characterized in that, The strength of the second housing (200) is greater than that of the first housing (100).

3. The housing assembly (10) according to claim 2, characterized in that, The second housing (200) is provided with a lifting structure (290) and a reinforcing area (210) surrounding at least a portion of the lifting structure (290). The strength of the reinforcing region (210) is greater than the strength of the second shell (200) excluding the reinforcing region (210).

4. The housing assembly (10) according to claim 3, characterized in that, The hoisting structure (290) is disposed at at least one end of the second housing (200) in a second direction, which intersects the first direction.

5. The housing assembly (10) according to claim 3, characterized in that, The second housing (200) includes a flange (250) that extends along the first direction and away from the first housing (100); The hoisting structure (290) is mounted on the flange (250).

6. The housing assembly (10) according to claim 5, characterized in that, The housing assembly (10) further includes a reinforcing plate (230); the reinforcing plate (230) is disposed on the flange (250) and surrounds at least a portion of the hoisting structure (290); The reinforcing plate (230) and the flange (250) connected thereto constitute the reinforcing area (210).

7. The housing assembly (10) according to claim 6, characterized in that, The reinforcing plate (230) is disposed on the side of the second housing (200) opposite to the receiving chamber (400).

8. The housing assembly (10) according to claim 7, characterized in that, The second housing (200) includes an integrally formed second body (280) and a first bending portion (220). The first bending portion (220) is disposed at the end of the second body (280) in a second direction and extends toward the first housing (100). The flange (250) is connected to the same end of the second body (280) and the first bending portion (220). The reinforcing plate (230) is also connected to the second body (280) and the first bending portion (220).

9. The housing assembly (10) according to claim 6, characterized in that, The reinforcing plate (230) includes a reinforcing plate body (231) and a buffer layer (232) stacked together, and the buffer layer (232) is disposed between the reinforcing plate body (231) and the second shell (200).

10. The housing assembly (10) according to claim 3, characterized in that, The second housing (200) includes a first sub-housing (260) and two second sub-housings (270), the two second sub-housings (270) being respectively disposed on one side of the first sub-housing (260) in a second direction and connected to the first sub-housing (260); the strength of the second sub-housings (270) is greater than the strength of the first sub-housing (260); The hoisting structure (290) is disposed on the second sub-shell (270), and the second sub-shell (270) constitutes the reinforcing area (210).

11. The housing assembly (10) according to any one of claims 1-10, characterized in that, The housing assembly (10) further includes a third housing (300) connected to the other end of the first housing (100) in the first direction, and the second housing (200), the first housing (100) and the third housing (300) are used to enclose a receiving chamber (400).

12. The housing assembly (10) according to claim 11, characterized in that, Along the thickness direction of the first housing (100), the second housing (200) overlaps the first housing (100), and / or the third housing (300) overlaps the first housing (100), wherein the thickness direction of the first housing (100) is perpendicular to the first direction.

13. The housing assembly (10) according to claim 12, characterized in that, The second housing (200) is spot-welded to the first housing (100), and a sealant is provided between the second housing (200) and the first housing (100); and / or The third housing (300) is connected to the first housing (100) by spot welding, and a sealant is provided between the third housing (300) and the first housing (100).

14. The housing assembly (10) according to claim 11, characterized in that, The strength of the first housing (100) is less than or equal to the strength of the third housing (300).

15. The housing assembly (10) according to claim 14, characterized in that, The thickness of the second housing (200) is greater than the thickness of the third housing (300), and the thickness of the third housing (300) is greater than the thickness of the first housing (100).

16. The housing assembly (10) according to claim 12, characterized in that, The first housing (100) includes a first base plate (110) and two side plates (120), the two side plates (120) being respectively connected to the two ends of the first base plate (110) along the second direction, and forming a first sub-accommodating cavity with the first base plate (110); The second housing (200) includes a second body (280), two first bends (220), and a second base plate (240). The second base plate (240) extends toward the first housing (100) and overlaps the first base plate (110). The two first bends (220) are respectively connected to the two ends of the second body (280) in the second direction and overlap the two side plates (120). The second base plate (240), the second body (280), and the two first bends (220) are connected and enclosed to form a second sub-accommodating chamber. The third housing (300) includes a third body (310), two second bends (320) and a third base plate (330). The third base plate (330) extends toward the first housing (100) and overlaps the first base plate (110). The two second bends (320) are respectively connected to the two ends of the third body (310) in the second direction and overlap the two side plates (120). The third base plate (330), the second body (280) and the two second bends (320) are connected and enclosed to form a third sub-accommodating chamber. The first direction, the second direction, and the thickness direction of the first housing (100) are perpendicular to each other, and the first sub-accommodating chamber, the second sub-accommodating chamber, and the third sub-accommodating chamber are interconnected to form the accommodating chamber (400).

17. The housing assembly (10) according to claim 16, characterized in that, The housing assembly (10) further includes a protective layer, which is connected to the surfaces of the first base plate (110), the second base plate (240) and the third base plate (330) opposite to the receiving chamber (400).

18. A battery device (1), characterized in that, Includes the housing assembly (10) and battery pack (20) as described in any one of claims 1-17, wherein the battery pack (20) is disposed within the receiving chamber (400) of the housing assembly (10).

19. The battery device (1) according to claim 18, characterized in that, Along the first direction, the distance between the battery pack (20) and the inner wall of the third housing (300) of the housing assembly (10) is greater than the distance between the battery pack (20) and the inner wall of the second housing (200) of the housing assembly (10).

20. The battery device (1) according to claim 18, characterized in that, It also includes a sealing cap (40) which is connected to the housing assembly (10) and seals the receiving chamber (400).

21. The battery device (1) according to claim 20, characterized in that, The battery device also includes a distribution box (30); the distribution box (30) is located on the side of the sealing cover (40) away from the housing assembly (10), and the orthographic projection of the distribution box (30) on the housing assembly (10) is adjacent to the second housing (200) of the housing assembly (10).

22. The battery device (1) according to claim 20, characterized in that, The battery pack (20) is connected to the sealing cap (40) by structural adhesive.

23. The battery device (1) according to claim 22, characterized in that, The battery device also includes a cold plate (50), which is disposed in the receiving chamber (400) and located on the side of the battery pack (20) away from the sealing cover (40); The cold plate (50) is connected to the battery pack (20) by thermally conductive adhesive.

24. An electrical appliance, characterized in that, It includes an electrical device and a battery device according to any one of claims 18-23, wherein the battery device is electrically connected to the electrical device and provides electrical energy to the electrical device.

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