Battery box, battery pack and power device

Abstract

The utility model relates to a battery box, a battery pack and a power device, the battery box comprises a front frame, a tray main body and a rear frame, the front frame and the rear frame are respectively arranged on two sides of the tray main body in the length direction; frames are arranged on the two sides of the wide edge of the tray body. A bottom plate is arranged at the bottom of the tray main body; a plurality of cross beams and a plurality of longitudinal beams which are vertically arranged are arranged in the tray main body, and reinforcing joints are arranged at the crossed joints of the cross beams and the longitudinal beams. The battery box disclosed by the utility model has the beneficial effects that the battery box is subjected to standardized modular design, and large-scale manufacturing can be realized in the production process, so that the cost of a single component is reduced, and the production cost is reduced; the modular battery box can be expanded as required, and has a wide application prospect; the front part and the rear part of the battery box adopt a modular casting thought, so that structure weakening caused by sectional material tailor welding is effectively reduced, welding procedures are effectively reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery box, a battery pack and a power device. Background Art

[0002] Modular battery box technology is an advanced technology designed to improve the scalability and configuration flexibility of battery systems. This technology has the following main advantages:

[0003] 1. Scalability: By adopting a modular design, the battery system can be quickly combined and reorganized according to different application requirements, thereby adapting to different types and scales of energy storage needs. This is especially important for electric vehicle manufacturers because it allows them to customize battery solutions according to the design and performance requirements of the vehicle.

[0004] 2. Configuration flexibility: Modular battery boxes are able to provide flexible configuration options, which means that different numbers and types of battery modules can be selected according to specific power and energy requirements during the design and manufacturing process. This flexibility helps reduce costs and improve efficiency.

[0005] 3. Improved integration: With the development of technology, the integration of battery boxes is also constantly improving, which not only increases the value of the bicycle, but also helps to simplify the manufacturing process and improve overall performance.

[0006] 4. Weight management: Battery boxes are usually large and heavy, so their impact on the weight of the entire vehicle needs to be considered during design and manufacturing.

[0007] 5. Material technology: In order to further improve the performance and safety of modular battery boxes, breakthroughs in key material technologies are essential. This includes innovations in battery box structural materials, heat dissipation materials, and battery management systems.

[0008] 6. Market demand driven: With the advancement of new energy policies and the growth of market demand, the battery box industry has gradually shifted from policy-driven to demand-driven. This means that technological innovation and product optimization will rely more on market feedback and consumer demand.

[0009] 7. Environmental protection and recycling: Modular design also facilitates battery maintenance and recycling, as individual modules can be more easily replaced or upgraded, thereby extending the service life of the entire battery system and reducing waste generation.

[0010] 8. Safety performance: The design of the modular battery box also needs to take into account the safety performance of the battery, including preventing risks such as overheating, short circuit and physical damage.

[0011] In summary, the development of modular battery box technology provides electric vehicles and energy storage systems with higher flexibility and performance, but also brings new challenges, such as how to balance factors such as cost, weight and safety. With the continuous advancement of technology, modular battery boxes in the future are expected to be more widely used in multiple fields. Although modular battery technology has advantages in improving flexibility, simplifying the manufacturing process and facilitating maintenance, it also has some disadvantages. Cost issues may be the main challenge, because modular design may require more complex production processes and higher precision components, resulting in higher overall costs. Utility Model Content

[0012] The technical problem to be solved by the utility model is to provide a battery box, a battery pack and a power device to solve the technical problems mentioned in the background technology.

[0013] The utility model solves the above technical problems with the following technical solutions: A battery box, comprising: a front frame, a tray body and a rear frame, wherein the front frame and the rear frame are respectively arranged on both sides of the tray body in the length direction;

[0014] The pallet body has frames on both sides of the wide side of the pallet body; a bottom plate is provided at the bottom of the pallet body; a plurality of vertically arranged cross beams and a plurality of longitudinal beams are provided in the pallet body, and a reinforced joint is provided at the cross connection between the cross beams and the longitudinal beams.

[0015] The beneficial effects of the utility model are as follows: the standardized modular design of the battery box can realize large-scale manufacturing in the production process, thereby reducing the cost of a single component and reducing the production cost; and the modularly designed battery box can be quickly assembled and deployed, which is an advantage for the production and maintenance of new energy vehicles; the modular battery box can be expanded as needed and has a wide range of application prospects; compared with traditional fuel vehicles, pure electric vehicles have greatly optimized their powertrain systems after eliminating components such as engines, and the design of modular battery boxes helps to make more efficient use of the vehicle's internal space; at the same time, the development of modular battery boxes is also a manifestation of technological innovation, which promotes the application of new materials and new structures and helps to improve the technical level of the entire industry. The front and rear parts of the battery box adopt a modular casting concept, which effectively reduces the structural weakening caused by profile welding, effectively reduces the welding process, and reduces the cost; the cross-shaped overlap area of ​​the profile adopts a riveted casting frame bracket, that is, the joint is strengthened for connection, which can effectively reduce welds, reduce welding tooling, avoid welding dead corners, and can structurally reinforce the joints of profile parts.

[0016] On the basis of the above technical solution, the present invention can also be improved as follows.

[0017] Furthermore, the crossbeam adopts a profile with a "convex"-shaped cross-section; the profile structure located at the "convex"-shaped head is defined as the first cavity, and the profile structure located below the "convex"-shaped head is defined as the second cavity, and both ends of the second cavity are respectively welded to the frame.

[0018] The beneficial effects of adopting the above-mentioned further scheme are as follows: the middle crossbeam also adopts a modular concept, and the appropriate profile cross-section can be selected according to the platform vehicle model, and the structural material can be changed to improve the strength in a targeted manner, so that the crossbeam has strong adaptability and flexibility, while also enhancing the applicability of the battery box; and the welding method of the crossbeam can effectively match the wheelbase and battery capacity of different vehicle models, and the size of the crossbeam can be adaptively adjusted according to the wheelbase of different vehicle models and the required battery capacity. The adjustability of the size enables the crossbeam to better adapt to the needs of various vehicle models and battery boxes, thereby improving the versatility and competitiveness of the product; because the crossbeam adopts a modular design, its manufacturing process can be standardized and automated, thereby improving production efficiency; at the same time, the connection method is simple and reliable, and the installation process is more convenient and quick, reducing manufacturing costs and installation difficulty.

[0019] Furthermore, a plurality of first connection holes are provided at intervals on the cross beam where the cross beam is not connected to the longitudinal beam, and mounting point connectors are provided in the first connection holes.

[0020] The beneficial effect of adopting the above further solution is that the cross beam is connected and fixed to the lower bottom plate and the upper component through the mounting point connector.

[0021] Further, the mounting point connector is arranged through the crossbeam;

[0022] The outer wall of the mounting point connector is welded to the connection point of the first cavity, and the mounting point connector is welded to the connection point of the lower end surface of the beam;

[0023] The upper end surface and the lower end surface of the mounting point connector extending out of the cross beam are respectively provided with threaded holes;

[0024] Washers are also respectively provided on the upper end surface and the lower end surface of the mounting point connector extending out of the cross beam.

[0025] The beneficial effects of adopting the above further scheme are: the mounting point connector is arranged through the crossbeam, and the connection between its outer wall and the first cavity is connected by welding. The mounting point connector passes through the crossbeam and is welded to the lower end face of the crossbeam. This structure significantly enhances the strength and stability of the connection point, so that the entire structure can withstand greater loads or vibrations; the threaded holes opened on the upper and lower end faces of the crossbeam where the mounting point connector extends out enable the crossbeam to be connected to the bottom plate and the components above the battery box through threaded fasteners, making the installation and disassembly process easier.

[0026] Furthermore, a first bayonet opening upward and a second bayonet opening downward are respectively provided on the cross beam at the connection with the longitudinal beam;

[0027] A plurality of openings are spaced apart on both sides above the second cavity, and the openings are symmetrically arranged with respect to the first cavity for heat dissipation or clipping wiring harnesses.

[0028] The beneficial effects of adopting the above further solution are: the crossbeam is connected to the longitudinal beam and the reinforced joint through the first bayonet and the second bayonet; and the multiple openings are used for heat dissipation or clipping wiring harnesses.

[0029] Further, a first notch is provided on the longitudinal beam at a location where the longitudinal beam is connected to the cross beam, and the cross beam is inserted into the first notch;

[0030] A weld is provided at the joint of the longitudinal beam and the cross beam, and a weld is provided at the connection between the longitudinal beam and the front frame or the rear frame.

[0031] The beneficial effects of adopting the above further scheme are: the connection between the crossbeam and the longitudinal beam is achieved through the setting of the first notch, the second bayonet, and the first bayonet in combination with the strengthening joint. The connection method of the first notch and the second bayonet enables the crossbeam to be accurately inserted into the longitudinal beam, and the positioning is more accurate. The installation is convenient and efficient, and the crossbeam and the longitudinal beam are stably connected. At the same time, the longitudinal beam and the crossbeam are welded at the joint, and a solid overall structure is formed between the longitudinal beam and the crossbeam. The setting of the weld ensures the strength and stability of the connection, so that the entire structure is not easily deformed or displaced when bearing loads. The first bayonet is used to support the bottom of the strengthening joint, which also enhances the overall stability of the structure.

[0032] Further, the lower part of the reinforcement joint is embedded in the first bayonet, and the two sides of the reinforcement joint close to the cross beam respectively extend first connection parts in the direction close to the cross beam, and the first connection parts overlap and are fixed to the upper end surface of the cross beam;

[0033] The first connecting portion has two sides close to the longitudinal beam and two second connecting portions extending in a direction close to the longitudinal beam, and the second connecting portions overlap and are fixed to the upper end surface of the longitudinal beam;

[0034] Second connection holes for connecting the cross beam or the longitudinal beam are respectively provided below the reinforcement joint, on the first connection portion, and on the second connection portion.

[0035] The beneficial effects of adopting the above-mentioned further scheme are: through the arrangement of the first connecting part and the second connecting part, multiple connection points are formed between the reinforcing joint and the cross beam and the longitudinal beam, thereby significantly improving the stability of the overall frame; the cross beam and the longitudinal beam are connected to each other through the reinforcing joint and threaded connection, and the reinforcing joint is connected to the longitudinal beam and the upper end surface of the cross beam by threaded fasteners respectively, thereby achieving the fixation of the cross beam and the longitudinal beam. At the same time, the cross-shaped overlap area of ​​the cross beam and the longitudinal beam is connected by a riveted casting frame bracket, which can effectively reduce welds, reduce welding tooling, avoid welding dead corners, and can structurally reinforce the joints of profile parts.

[0036] Furthermore, the front frame and the rear frame are both integrally formed by casting.

[0037] The beneficial effect of adopting the above further solution is: adopting a modular casting concept can effectively reduce the structural weakening caused by profile welding, effectively reduce the welding process, and reduce costs.

[0038] The utility model also provides a battery pack, comprising:

[0039] A battery box as described above;

[0040] A battery module is accommodated in the battery accommodation space of the battery box.

[0041] The beneficial effect of adopting the above further scheme is that the battery module is an independent unit and is installed with the corresponding battery box as needed. The modular design makes the battery pack more flexible and can be customized according to different vehicle models and mileage requirements. At the same time, the modular design also helps to reduce production costs and speed up production.

[0042] The utility model also provides a power device, which is equipped with the battery pack as described above.

[0043] The beneficial effect of adopting the above further solution is that the modularly produced battery pack can be applied to the power device to provide a stable and continuous energy supply for the power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0045] Figure 2 A top view of an embodiment of the utility model;

[0046] Figure 3 This is a structural schematic diagram of a rear frame in an embodiment of the utility model;

[0047] Figure 4This is a structural schematic diagram of a front frame in an embodiment of the utility model;

[0048] Figure 5 This is a schematic diagram of the structure of one of the crossbeams in one embodiment of the utility model;

[0049] Figure 6 for Figure 5 A cross-sectional view of

[0050] Figure 7 This is a schematic diagram of the structure of the second cavity in one embodiment of the utility model;

[0051] Figure 8 This is a structural schematic diagram of a mounting point connector in one embodiment of the utility model;

[0052] Fig. 9 A top view of a reinforced joint in one embodiment of the utility model;

[0053] Fig.10 This is the bottom structure of the battery box after removing the bottom guard plate and PVC coating in an embodiment of the utility model.

[0054] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0055] 1. Pallet body; 2. Front frame; 3. Rear frame; 4. Frame; 5. Crossbeam; 6. Longitudinal beam; 7. Reinforced joint; 8. Mounting point connector; 9. Water cooling plate; 10. Weld; 51. First cavity; 52. Second cavity; 53. First connecting hole; 54. First bayonet; 55. Second bayonet; 71. First connecting part; 72. Second connecting part; 81. Weld I; 82. Weld II; 83. Weld III. DETAILED DESCRIPTION

[0056] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0057] First, as Figure 1-4As shown, the utility model provides a battery box, including: a front frame 2, a tray body 1 and a rear frame 3, the front frame 2 and the rear frame 3 are respectively arranged on both sides of the length direction of the tray body 1; in this embodiment, the front frame 2 and the rear frame 3 are both cast one-piece molding structures, and the front frame 2 and the rear frame 3 at the front and rear parts of the battery box both adopt a modular casting concept, which effectively reduces the structural weakening caused by profile welding, and effectively reduces the welding process, further reducing the cost. Frames 4 are respectively arranged on both sides of the tray body 1 in the width direction. The frame 4 and the front frame 2 and the rear frame 3 are fully welded to effectively improve the rigidity and strength performance of the modular battery box, seal the profile opening, and improve the NVH (Noise, Vibration, Harshness) performance of the whole package; the frame 4, the connecting end of the front frame 2 and the tray body 1, and the connecting end of the rear frame 3 and the tray body 1 are enclosed to form a frame structure, and a bottom plate is arranged at the bottom end of the frame structure, wherein the bottom plate is a multi-layer structure, including, from top to bottom, an upper plate of a water-cooled plate, a lower plate of a water-cooled plate, and a bottom guard plate, wherein the bottom guard plate is coated with PVC. The water-cooling plate 9 of the battery of the casting + profile welding method adopts the water-cooling plate FSW (Friction Stir Welding) welding method, which is 30% faster than the MIG (Metal Inert Gas Welding) welding method, thereby shortening the welding time, reducing the number of screwed parts, and thus reducing the cost; Fig.10 The bottom structure of the battery box after removing the bottom guard plate and the PVC coating is shown in FIG. The central part of the figure is the water cooling plate 9, and the welding path, i.e., the weld 10, is shown in FIG. Fig.10 Shown in black bold lines.

[0058] It is conceivable that with the development of electric vehicle technology and the increasing demand of consumers for driving range, modular battery boxes can be adaptively expanded as needed to meet different market needs.

[0059] The tray body 1 is also provided with a plurality of vertically arranged cross beams 5 and a plurality of longitudinal beams 6, and a reinforcing joint 7 is provided at the cross connection between the cross beams 5 and the longitudinal beams 6, which effectively reduces the weld seams and improves the structural strength. The number of cross beams 5 and longitudinal beams 6 can be adaptively adjusted according to the wheelbase of different vehicle models and the required battery capacity, and the size of the battery box, and no limitation is made here.

[0060] In the above scheme, the standardized modular design of the battery box can realize large-scale manufacturing in the production process, thereby reducing the cost of a single component and reducing the production cost; and the modularly designed battery box can be quickly assembled and deployed, which is an advantage for the production and maintenance of new energy vehicles; the modular battery box can be expanded as needed and has a wide range of application prospects; compared with traditional fuel vehicles, pure electric vehicles have greatly optimized the power transmission system after eliminating components such as the engine, and the design of the modular battery box helps to use the internal space of the vehicle more efficiently; at the same time, the development of modular battery boxes is also a manifestation of technological innovation, which promotes the application of new materials and new structures and helps to improve the technical level of the entire industry. The front and rear parts of the battery box adopt a modular casting concept to effectively reduce the structural weakening caused by profile welding, and effectively reduce the welding process, reducing the cost; the cross-shaped overlap area of ​​the profile adopts a riveted casting frame bracket, that is, the strengthening joint 7 is connected, which can effectively reduce welds, reduce welding tooling, avoid welding dead corners, and can structurally reinforce the splicing of profile parts.

[0061] In some feasible embodiments, the cross beam 5 is a profile having a convex cross section, such as Figure 6 As shown; the profile structure located at the "convex" head is defined as the first cavity 51, and the profile structure located below the "convex" head is defined as the second cavity 52. ​​The two ends of the first cavity 51 in the length direction are not arranged on the same end surface as the two ends of the second cavity 52 in the length direction, that is, the length of the first cavity 51 is shorter than the length of the second cavity 52. ​​Therefore, after the two ends of the crossbeam 5 are connected to the frame 4, the two ends of the first cavity 51 in the length direction are spaced from the frame 4, and the two ends of the second cavity 52 are respectively welded to the frame 4, and the weld is located at the end of the second cavity 52. ​​The crossbeam 5 also adopts a modular approach, and a suitable profile section can be selected for the platform vehicle model, and the structural material can be changed to improve the strength in a targeted manner, so that the applicability of the battery box is enhanced. It can be imagined that the size of the crossbeam 5 can be adaptively adjusted according to the wheelbase of different vehicle models and the required battery capacity, and with the size of the battery box, and no further restrictions are made here.

[0062] In the above scheme, the middle crossbeam 5 also adopts a modular concept, and can select a suitable profile section according to the platform vehicle model, and can change the structural material to improve the strength in a targeted manner, so that the crossbeam 5 has strong adaptability and flexibility, and also enhances the applicability of the battery box; and the welding method of the crossbeam 5 can effectively match the wheelbase and battery capacity of different vehicle models, and the size of the crossbeam 5 can be adaptively adjusted according to the wheelbase of different vehicle models and the required battery capacity. The adjustability of the size enables the crossbeam 5 to better adapt to the needs of various vehicle models and battery boxes, thereby improving the versatility and competitiveness of the product; because the crossbeam 5 adopts a modular design, its manufacturing process can be standardized and automated, thereby improving production efficiency; at the same time, the connection method is simple and reliable, and the installation process is more convenient and quick, reducing the manufacturing cost and installation difficulty.

[0063] like Figure 1-2 As shown in Figure 5, a plurality of first connection holes 53 are spaced apart on the crossbeam 5 at the non-connected part of the crossbeam 5 and the longitudinal beam 6, and the first connection holes 53 are used to connect the mounting point connector 8. In some feasible embodiments, two vertically arranged crossbeams 5 and one longitudinal beam 6 are also provided in the tray body 1, wherein one crossbeam 5 is provided with four mounting point connectors 8, and the other crossbeam 5 is provided with two mounting point connectors 8, so that the crossbeam 5 is connected and fixed to the lower bottom plate and the upper component through the mounting point connector 8, and the position of the mounting point connector 8 corresponds to the position of the upper connected seat. Among them, the middle mounting point (i.e., the mounting point connector 8) is connected by a profile, which can flexibly match the iteration of vehicle models and enhance the versatility of the platform.

[0064] like Figure 8 As shown, in the preferred solution, the diameter of the mounting point connector 8 matched with the first cavity 51 is larger than the diameter matched with the second cavity 52, the mounting point connector 8 is arranged through the crossbeam 5, and both ends of the mounting point connector 8 extend out of the lateral upper end surface and the lower end surface, and the outer wall of the mounting point connector 8 is welded to the connection of the first cavity 51, and the positions of the weld seam I81 and the weld seam II82 are as shown in FIG. Figure 8 As shown, the connection between the mounting point connector 8 and the lower end surface of the cross beam 5 is welded, and the weld III 83 is as shown in FIG. Figure 8 The upper and lower end surfaces of the mounting point connector 8 extending out of the cross beam 5 are provided with threaded holes. In this embodiment, one M8×1.25 threaded hole is provided on the upper and lower end surfaces, and washers are provided on the upper and lower end surfaces of the mounting point connector 8 extending out of the cross beam 5, respectively. The threaded holes and washers are used to realize the connection with the bottom plate and the upper components of the battery box.

[0065] In the above scheme, the mounting point connector 8 is arranged through the cross beam 5, and the connection between its outer wall and the first cavity 51 is connected by welding. The mounting point connector 8 passes through the cross beam 5 and is welded to the lower end face of the cross beam 5. This structure significantly enhances the strength and stability of the connection point, so that the entire structure can withstand greater loads or vibrations; the threaded holes opened on the upper and lower end faces of the cross beam 5 where the mounting point connector 8 extends out make it possible to connect the cross beam 5 to the bottom plate and the components above the battery box through threaded fasteners, making the installation and disassembly process simpler.

[0066] like Figure 7 As shown, the cross beam 5 at the connection with the longitudinal beam 6 is provided with a first bayonet 54 opening upward and a second bayonet 55 opening downward, so that the cross beam 5 is connected to the longitudinal beam 6 and the reinforcing joint 7 through the first bayonet 54 and the second bayonet 55. At the same time, a plurality of openings are evenly spaced on both sides above the second cavity 52, and the openings are arranged in pairs, and each pair of openings is symmetrically arranged about the first cavity 51, for heat dissipation or buckling of wiring harnesses.

[0067] Correspondingly, a first notch is provided on the longitudinal beam 6 at the connection with the cross beam 5, wherein the first notch is not shown in the figure, and the first notch is provided from the upper end surface of the longitudinal beam 6 to the inside of the longitudinal beam 6; when connecting, the second bayonet 55 of the cross beam 5 is inserted into the first notch from top to bottom, and at this time, the first bayonet 54 is used to support the bottom of the reinforcing joint 7, and then the cross beam 5 is welded to the longitudinal beam 6, and specifically, a weld is provided at the joint of the longitudinal beam 6 and the cross beam 5. The connection between the longitudinal beam 6 and the front frame 2 or the rear frame 3 is also welded.

[0068] In the above scheme, the connection between the cross beam 5 and the longitudinal beam 6 is achieved by the first notch, the second bayonet 55, and the first bayonet 54 in conjunction with the setting of the reinforcement joint 7. The connection method of the first notch and the second bayonet 55 enables the cross beam 5 to be accurately inserted into the longitudinal beam 6, and the positioning is more accurate. The installation is convenient and efficient, and the cross beam 5 and the longitudinal beam 6 are stably connected. At the same time, the longitudinal beam 6 and the cross beam 5 are welded at the joint, and a solid overall structure is formed between the longitudinal beam 6 and the cross beam 5. The setting of the weld ensures the strength and stability of the connection, so that the entire structure is not easily deformed or displaced when bearing loads. The first bayonet 54 is used to support the bottom of the reinforcement joint 7, and also enhances the overall stability of the structure.

[0069] like Figure 1 , Fig. 9As shown, the lower part of the reinforcing joint 7 is embedded in the first bayonet 54, and the first connecting parts 71 are extended from both sides of the upper part of the reinforcing joint 7 close to the cross beam 5 in the direction close to the cross beam 5, and the first connecting parts 71 are overlapped and fixed to the upper end surface of the cross beam 5; at the same time, the second connecting parts 72 are extended from both sides of the first connecting part 71 close to the longitudinal beam 6 in the direction close to the longitudinal beam 6, and the second connecting parts 72 are overlapped and fixed to the upper end surface of the longitudinal beam 6; therefore, in the present embodiment, a total of 4 second connecting parts 72 and 2 first connecting parts 71 are provided, and the lower part of the reinforcing joint 7 is concavely arranged compared with the first connecting part 71 and the second connecting part 72, and threaded holes are respectively opened at the lower part of each first connecting part 71, each second connecting part 72 and the reinforcing joint 7, and the threaded holes located at the lower part of the reinforcing joint 7 penetrate the profiles of the cross beam 5 and the longitudinal beam 6 located below the reinforcing joint 7, so that the cross beam 5, the longitudinal beam 6 and the lower part of the reinforcing joint 7 can be fixedly connected at the same time by fasteners.

[0070] In the above scheme, through the arrangement of the first connecting portion 71 and the second connecting portion 72, multiple connection points are formed between the reinforcing joint 7 and the cross beam 5 and the longitudinal beam 6, thereby significantly improving the stability of the overall frame; the cross beam 5 and the longitudinal beam 6 are connected to each other through the reinforcing joint 7 and threaded connection, and the reinforcing joint 7 is respectively connected to the longitudinal beam 6 and the upper end surface of the cross beam 5 through threaded fasteners, thereby achieving the fixation of the cross beam 5 and the longitudinal beam 6. The connection method is simple and efficient. At the same time, the cross-shaped overlap area of ​​the cross beam 5 and the longitudinal beam 6 is connected by a riveted casting frame bracket, which can effectively reduce welds, reduce welding tooling, avoid welding dead corners, and can structurally reinforce the joints of profile parts.

[0071] In a second aspect, a battery pack is provided, comprising: a battery box and a battery module as described above, wherein the cross beam 5 and the longitudinal beam 6 in the tray body 1 of the battery box divide the battery box into a plurality of battery accommodation spaces, the battery module is accommodated in the battery accommodation space of the battery box and connected to the cross beam 5 and the longitudinal beam 6 in the battery box; the battery box electronic components such as the BMS (Battery Management System) and the high-voltage components are stored in the rear frame 3

[0072] In the above solution, the battery module is an independent unit, which is installed with the corresponding battery box as needed. The modular design makes the battery pack more flexible and can be customized according to different vehicle models and mileage requirements. At the same time, the modular design also helps to reduce production costs and speed up production. At the same time, the use of modular battery box technology also improves the scalability and configuration flexibility of the battery system.

[0073] According to a third aspect, a power device is provided, wherein the power device is equipped with the battery pack as described above.

[0074] In the above scheme, the modularly produced battery pack can be applied to the power device to provide a stable and continuous energy supply for the power device.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery box, characterized in that: include: A front frame (2), a tray body (1) and a rear frame (3), wherein the front frame (2) and the rear frame (3) are respectively arranged on both sides of the tray body (1) in the length direction; A pallet body (1), wherein two sides of the wide side of the pallet body (1) are provided with frame frames (4); a bottom plate is provided at the bottom of the pallet body (1); a plurality of vertically arranged cross beams (5) and a plurality of longitudinal beams (6) are provided inside the pallet body (1), and a reinforcing joint (7) is provided at the cross-connection between the cross beams (5) and the longitudinal beams (6).

2. A battery box according to claim 1, characterized in that: The cross beam (5) is made of a profile with a "convex"-shaped cross section; the profile structure located at the "convex"-shaped head is defined as a first cavity (51), and the profile structure located below the "convex"-shaped head is defined as a second cavity (52); the two ends of the second cavity (52) are respectively welded to the frame (4).

3. A battery box according to claim 2, characterized in that: A plurality of first connection holes (53) are provided at intervals on the cross beam (5) where the cross beam (5) is not connected to the longitudinal beam (6), and a mounting point connection member (8) is provided in the first connection hole (53).

4. A battery box according to claim 3, characterized in that: The mounting point connector (8) is disposed through the crossbeam (5); The outer wall of the mounting point connection member (8) is welded to the connection point of the first cavity (51), and the mounting point connection member (8) is welded to the connection point of the lower end surface of the crossbeam (5); The upper end surface and the lower end surface of the mounting point connector (8) extending out of the cross beam (5) are respectively provided with threaded holes; Washers are also provided on the upper end surface and the lower end surface of the mounting point connector (8) extending out of the cross beam (5), respectively.

5. A battery box according to claim 3, characterized in that: The cross beam (5) connected to the longitudinal beam (6) is provided with a first bayonet (54) opening upward and a second bayonet (55) opening downward. A plurality of openings are also arranged at intervals on both sides above the second cavity (52), and the openings are symmetrically arranged with respect to the first cavity (51) and are used for heat dissipation or clipping wiring harnesses.

6. A battery box according to claim 5, characterized in that: A first notch is provided on the longitudinal beam (6) at the connection with the cross beam (5), and the cross beam (5) is inserted into the first notch; A weld is provided at the joint between the longitudinal beam (6) and the cross beam (5), and a weld is provided at the connection between the longitudinal beam (6) and the front frame (2) or the rear frame (3).

7. A battery box according to claim 6, characterized in that: The lower part of the reinforcing joint (7) is embedded in the first bayonet (54), and the two sides of the reinforcing joint (7) close to the cross beam (5) respectively extend first connecting parts (71) in a direction close to the cross beam (5), and the first connecting parts (71) overlap and are fixed to the upper end surface of the cross beam (5); Second connecting parts (72) are respectively extended from both sides of the first connecting part (71) close to the longitudinal beam (6) in a direction close to the longitudinal beam (6), and the second connecting part (72) overlaps and is fixed to the upper end surface of the longitudinal beam (6); Second connection holes for connecting the cross beam (5) or the longitudinal beam (6) are respectively provided below the reinforcing joint (7), on the first connection portion (71) and on the second connection portion (72).

8. A battery box according to any one of claims 1 to 7, characterized in that: The front frame (2) and the rear frame (3) are both integrally formed by casting.

9. A battery pack, characterized in that: include: A battery box as described in any one of claims 1 to 7; A battery module is accommodated in the battery accommodation space of the battery box.

10. A power device, characterized in that: The power device is equipped with a battery pack as claimed in claim 9.

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