Hoisting structure of battery pack, battery pack assembly and power utilization device

Abstract

The hoisting structure comprises a first sleeve, a second sleeve and a long bolt, the first sleeve penetrates through the bottom of the battery pack and an upper cover of a box body, one end of the first sleeve is sleeved with the second sleeve, the two sides of the second sleeve are connected with a liquid cooling plate of the battery pack respectively, and the long bolt is connected with the liquid cooling plate of the battery pack. The other end of the first sleeve is connected with the bottom of the battery pack, and the long bolt penetrates through the first sleeve to be connected with an external mechanism. According to the utility model, the second sleeve is additionally arranged, is respectively connected with the liquid cooling plate in the battery pack, is sleeved on the first sleeve, and is used for connecting the hoisting structure with the liquid cooling plate in the battery pack; on the basis that connection points exist between the first sleeve and the bottom of the battery pack and between the first sleeve and the upper cover of the battery pack, connection points between the hoisting structure and a liquid cooling plate in the battery pack are added, and the overall structure of the battery pack is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to a hoisting structure of a battery pack, a battery pack assembly and an electric device. Background Art

[0002] A battery is a device that converts energy in the form of chemical energy, mechanical energy, light energy, nuclear energy, etc. into electrical energy. Its applications are very extensive, and it is indispensable for battery support from portable electronic devices (such as mobile phones, laptops, cameras, etc.) to large devices (such as electric vehicles, energy storage systems, etc.). In order to meet the requirements of vehicle layout, increase the vehicle's cruising range, and realize the modularization and platform application of the battery box, the batteries of electric vehicles tend to be flat large battery pack structures. For the flat large battery pack structure, in addition to evenly arranging lifting points around the outer side of the battery box, installation points also need to be arranged in the middle area of the entire battery pack box.

[0003] In the prior art, the lifting point structure of a flat large battery pack usually includes: a sleeve, a long bolt and a nut. The installation method is usually that one end of the sleeve is fixed to the battery box by welding, and the other end of the sleeve cooperates with the nut to clamp and fix the battery pack lid. The overall structure is relatively simple. However, in the installation method of the above lifting point structure, the fixed points are only the welding point at one end and the clamping point at the other end. Since the battery pack lid is relatively thin, the stress point is concentrated on the welding area at one end. In complex working conditions, the lifting point structure is prone to deformation, and the lifting point structure has no connection with the internal structure of the battery pack, and the overall structure is not strong and the mode is relatively low.

[0004] Therefore, the present application aims to propose a hoisting structure of a new type of battery pack, a battery pack assembly and an electric device, aiming to solve the above problems. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a hoisting structure of a battery pack, a battery pack assembly and an electric device, aiming to solve the technical problem that the fixed points of the lifting point structure in the prior art have no connection with the internal structure of the battery pack, thereby resulting in the overall structure of the battery pack not being strong.

[0006] In order to achieve the above utility model purpose, on the one hand, the utility model proposes a hoisting structure of a battery pack for hanging the battery pack on an external mechanism, including a first sleeve, a second sleeve and a long bolt. The first sleeve penetrates through the bottom and the upper cover of the battery pack. The second sleeve is sleeved at one end of the first sleeve. Both sides of the second sleeve are respectively connected to the liquid cooling plate of the battery pack. The other end of the first sleeve is connected to the bottom of the battery pack. The long bolt passes through the first sleeve and is connected to the external mechanism.

[0007] Further, the hoisting structure further includes a fixing member sleeved on one end of the first sleeve, and the fixing member is used to cooperate with the second sleeve to clamp and fix the upper cover of the battery pack.

[0008] Further, fixing holes are provided on both sides of the second sleeve, threaded holes are provided on the liquid cooling plate of the battery pack, and the second sleeve and the liquid cooling plate are connected by bolts passing through the fixing holes on both sides of the second sleeve and the threaded holes on both sides of the liquid cooling plate.

[0009] Further, a recessed portion is provided on the outer periphery of one end of the first sleeve, and the second sleeve is sleeved on the recessed portion.

[0010] Further, the hoisting structure further includes a first sealing member sleeved outside the first sleeve, and the first sealing member seals the installation gap between the first sleeve and the second sleeve.

[0011] Further, the hoisting structure has a second sealing member. A groove is provided on the upper surface of the second sleeve, the groove is arranged in a ring around the first sleeve, and the second sealing member is arranged in the groove, and the second sealing member seals the installation gap between the second sleeve and the upper cover of the box body.

[0012] Further, a flange is provided at one end of the first sleeve connected to the bottom of the battery, and the inner surface and the side surface of the flange are respectively connected to the bottom of the battery pack.

[0013] To achieve the above-mentioned utility model purpose, a second aspect of the present utility model proposes a battery pack assembly, including a battery pack. The battery pack includes a battery box body, an upper cover of the box body, a fixing cross beam and multiple liquid cooling plates. The fixing cross beam is arranged at one end of the battery box body, and the ends of one ends of the multiple liquid cooling plates are respectively connected to the fixing cross beam; and the hoisting structure of the battery pack according to any one of the above, and the hoisting structure is used to mount the battery pack on an external mechanism.

[0014] Further, the multiple liquid cooling plates are arranged side by side along the width direction of the battery pack; two relatively arranged liquid cooling plates are arranged at the middle position in the width direction of the battery pack, and at least one hoisting structure is arranged between the two relatively arranged liquid cooling plates.

[0015] Further, inclined surfaces are provided on both sides of the contact between the liquid cooling plate and the bottom plate of the battery box body.

[0016] Further, the side plate and / or the bottom plate of the battery box body is a hollow structure, and reinforcing ribs are arranged in the hollow structure.

[0017] Further, to achieve the above-mentioned utility model purpose, a third aspect of the present utility model proposes an electrical device, including a frame body; and the above-mentioned battery pack assembly, and the hoisting structure mounts the battery pack assembly on the frame body.

[0018] Beneficial effects:

[0019] Compared with the prior art, a hoisting structure of a battery pack in an embodiment of the present application includes a first sleeve, a second sleeve, and a long bolt. The first sleeve penetrates through the bottom and the upper cover of the battery pack. The second sleeve is sleeved at one end of the first sleeve. Two sides of the second sleeve are respectively connected to the liquid cooling plates of the battery pack. The other end of the first sleeve is connected to the bottom of the battery pack. The long bolt passes through the first sleeve and is connected to an external mechanism. This technical solution adds a second sleeve, and the second sleeve is respectively connected to the liquid cooling plates inside the battery pack. At the same time, the second sleeve is sleeved on the first sleeve. By connecting the hoisting structure to the liquid cooling plates inside the battery pack through the second sleeve, on the basis that there are connection points between the first sleeve and the bottom of the battery pack and the upper cover of the battery pack, the connection points between the hoisting structure and the liquid cooling plates inside the battery pack are increased, enhancing the overall structural stability of the battery pack.

[0020] Compared with the prior art, a battery pack assembly in an embodiment of the present application includes the hoisting structure of the battery pack according to any one of the above. It can be understood that the battery pack assembly of the present application may include all the technical features and technical effects of the hoisting structure of the above battery pack, which will not be elaborated herein. Description of the drawings

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a battery pack assembly according to an embodiment of the present utility model;

[0022] Figure 2 It is a top view of a battery pack assembly according to an embodiment of the present utility model;

[0023] Figure 3 It is Figure 2 a schematic cross-sectional view taken along line B-B in

[0024] Figure 4 It is Figure 3 an enlarged schematic view at I in

[0025] Figure 5 It is Figure 4 an enlarged schematic view at C in

[0026] Figure 6 It is Figure 4 an enlarged schematic view at D in

[0027] Figure 7 It is a three-dimensional schematic diagram of a battery box body according to an embodiment of the present utility model;

[0028] Figure 8 Explosion schematic diagram of the battery pack assembly except for the battery module in an embodiment of the present utility model;

[0029] Figure 9 Schematic diagram of an electrical device provided by an embodiment of the present utility model.

[0030] Wherein:

[0031] 1. Battery pack assembly; 10. Battery pack; 100. Battery box; 1000. First bottom plate; 1001. Second bottom plate; 101. Liquid cooling plate; 1010. Threaded hole; 1011. Inclined surface; 102. Upper cover of the box; 103. Fixed cross beam; 11. Lifting structure; 110. First sleeve; 111. Second sleeve; 1110. Fixed hole; 1111. Groove; 112. Long bolt; 1120. Concave part; 1121. Flange; 113. Fixing piece; 14. First sealing member; 15. Second sealing member; 16. Electrical device; 160. Frame body; 161. Motor; 162. Controller.

[0032] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0033] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0037] The hoisting structure of the battery pack, also known as the mounting mechanism, refers to the structural system used to fix and support the battery pack on a vehicle or other equipment. It usually includes a series of support points, connectors, fasteners, and possibly buffer and shock absorption devices to ensure that the battery pack can be stably installed in the designated position and withstand various forces and vibrations during vehicle driving or equipment operation without displacement or damage.

[0038] Currently, the battery tends to be a flat large battery pack structure, specifically referring to that the upper and lower surfaces of the battery box are flat structures, the thickness is getting thinner and the boundary dimensions are getting larger. Its main purpose is to meet the vehicle layout requirements, increase the vehicle's cruising range, and realize the modular and platform application of the battery box. For the flat large battery pack structure, in addition to designing lifting points around the outer side of the battery pack box, lifting points also need to be arranged in the middle area of the entire battery pack box. The lifting points around the outer side of the battery box can be arranged freely and are usually not affected by the layout of the battery modules inside the battery box. However, when setting a hoisting structure in the middle of the battery box, it needs to penetrate the battery pack and avoid the modules inside the battery box. The usual design structure is that the bottom end of the sleeve is welded and fixed to the bottom end of the battery box. After avoiding the battery modules inside the battery box, the other end of the sleeve is cooperated with a nut to clamp and fix the battery pack cover. The long bolt passes through the sleeve from the bottom of the battery pack through the cover of the battery pack and is connected to the vehicle chassis.

[0039] However, during the design of the hoisting structure of the battery pack, the inventor found through modal analysis that in the existing installation method of the lifting point structure, the fixed points are only the welding point at one end and the clamping point at the other end. Since the battery box cover is relatively thin, the stress point is concentrated in the welding area at one end. In complex working conditions, the lifting point structure is prone to deformation, and the lifting point structure has no connection with the internal structure of the battery pack, resulting in a weak overall structure and a low mode.

[0040] To solve the technical problem that the fixed point of the above-mentioned lifting point structure has no connection with the internal structure of the battery pack, which in turn leads to a weak overall structure of the battery pack, the embodiment of the present application provides a hoisting structure for the battery pack. The technical solution of the present application adds a second sleeve, and the second sleeve is respectively connected to the liquid cooling plate inside the battery pack. At the same time, the second sleeve is sleeved on the first sleeve. By connecting the hoisting structure with the liquid cooling plate inside the battery pack through the second sleeve, a connection point between the hoisting structure and the liquid cooling plate inside the battery pack is added on the basis of the connection points between the first sleeve and the bottom of the battery pack and the upper cover of the battery pack, enhancing the overall structure of the battery pack. The hoisting structure in the embodiment of the present application will be described in detail below with reference to the drawings.

[0041] Please refer to Figures 1 to 4 , Figure 1 which is a schematic three-dimensional structure diagram of the battery pack assembly 1 according to an embodiment of the present invention, Figure 2 which is a top view of the battery pack assembly 1 according to an embodiment of the present invention, Figure 3 is Figure 2 the schematic cross-sectional view taken along the line B-B in Figure 4 and Figure 3 is an enlarged schematic view of the portion I in . The battery pack assembly 1 according to the embodiment of the present application includes a battery pack 10 and a hoisting structure 11. The hoisting structure 11 is used to mount the battery pack 10 on an external mechanism. The present application does not specifically limit the external mechanism. Depending on the different usage environments of the battery pack 10, the external mechanism is also different, including but not limited to vehicles, airplanes, and ships.

[0042] Exemplarily, the battery pack 10 of the present application includes a battery box body 100, a box body upper cover 102, battery modules, a battery management system, a thermal management system, an electrical system, and other accessories. Among them, the battery box body 100 and the box body upper cover 102 together form a cavity space for accommodating the above-mentioned battery modules, battery management system, thermal management system, electrical system, and other accessories. In one example, the battery box body 100 includes a bottom plate and side plates, and the thermal management system includes a liquid cooling plate 101. As Figure 3 and Figure 4 shown, the hoisting structure 11 can directly apply a tensile force to the bottom plate of the battery box body 100 to achieve the purpose of mounting the battery pack 10 on an external mechanism.

[0043] During the specific hanging operation, a battery pack 10 can be jointly acted on by multiple lifting structures 11, and the application does not specifically limit the number of the lifting structures 11.

[0044] Please refer to Figures 1 to 8 , in this embodiment, a lifting structure 11 for a battery pack 10 is provided, including a first sleeve 110, a second sleeve 111 and a long bolt 112. The first sleeve 110 penetrates through the bottom and the upper cover of the battery pack 10. The second sleeve 111 is sleeved at one end of the first sleeve 110. Both sides of the second sleeve 111 are respectively connected to the liquid cooling plate 101 of the battery pack 10. The other end of the first sleeve 110 is connected to the bottom of the battery pack 10. The long bolt 112 passes through the first sleeve 110 and is connected to an external mechanism.

[0045] In this embodiment, the first sleeve 110 serves as the main load-bearing component, penetrates through the bottom and the upper cover of the battery pack 10, and is used to bear the weight of the battery pack 10. The second sleeve 111 is arranged at one end of the first sleeve 110 and is connected to the liquid cooling plate 101 through both sides thereof, so that the weight of the battery pack 10 can be dispersed to multiple points, reducing the pressure on a single point. At the same time, the second sleeve 111 is respectively connected to the first sleeve 110 and the liquid cooling plate 101, enhancing the stability and rigidity of the overall structure of the battery pack 10. The long bolt 112 passes through the first sleeve 110 and is used to connect to an external mechanism.

[0046] It should be noted that the liquid cooling plate 101 of the present application is arranged between battery modules. Among them, the liquid cooling plate 101 for installing the lifting structure 11 is located at the middle position in the width direction of the battery pack 10 and is two relatively arranged liquid cooling plates 101.

[0047] In the above embodiment, by connecting the lifting structure 11 with the internal liquid cooling plate 101 of the battery pack 10 through the second sleeve 111, a connection point between the lifting structure 11 and the internal liquid cooling plate 101 of the battery pack 10 is added on the basis of the connection points between the first sleeve 110 and the bottom of the battery pack 10 and the upper cover of the battery pack 10. The weight of the battery pack 10 can be dispersed from the connection area between the bottom of the first sleeve 110 and the bottom of the battery box 100 to the liquid cooling plate 101 inside the battery pack 10 through the second sleeve 111, reducing the pressure on a single point and enhancing the overall structural stability of the battery pack 10.

[0048] Please refer to Figures 1 to 8 , in an embodiment, the lifting structure 11 of the battery pack 10 further includes a fixing member 113. The fixing member 113 is sleeved at one end of the first sleeve 110. The upper and lower end faces of the second sleeve 111 are respectively abutted against the upper cover and the liquid cooling plate 101 of the battery pack 10. The fixing member 113 is used to cooperate with the second sleeve 111 to clamp and fix the upper cover of the battery pack 10.

[0049] In this embodiment, the fixing member 113 is sleeved on one end of the first sleeve 110 and is used to cooperate with the second sleeve 111 to clamp and fix the upper cover 102 of the battery pack 10.

[0050] In the above embodiment, the fixing member 113 and the second sleeve 111 clamp the upper cover 102 of the battery box, enhancing the connection strength between the upper cover 102 of the battery box and the entire battery pack 10, making the structure of the entire battery pack 10 more compact and stable. At the same time, by clamping the upper cover 102 of the battery box, the fixing member 113 disperses to a certain extent the pressure generated when the battery pack 10 is mounted on other external mechanisms during operation, preventing the upper cover 102 of the battery box from being damaged due to excessive single-point stress. At the same time, the position between the lifting structure 11 and the battery pack 10 is relatively fixed, and the lifting structure 11 will not spread axially. The present application does not specifically limit the fixing member 113. In one embodiment, the fixing member 113 can be a nut with internal threads, and the end of one end of the first sleeve 110 is provided with corresponding external threads, and the fixing member 113 is fixedly connected to the first sleeve 110 through threads.

[0051] Please refer to Figures 1 to 8 , in one embodiment, fixing holes 1110 are provided on both sides of the second sleeve 111, threaded holes 1010 are provided on the liquid cooling plate 101 of the battery pack 10, and the second sleeve 111 and the liquid cooling plate 101 are connected by bolts passing through the fixing holes 1110 on both sides of the second sleeve 111 and the threaded holes 1010 on both sides of the liquid cooling plate 101.

[0052] It should be noted that when the lifting structure 11 of the battery pack 10 of the present application is applied to the battery pack 10, there may be through holes provided on the battery pack 10, and the first sleeve is arranged between the battery box body 100 and the upper cover 102 of the battery box through the fixing member 113; or the first sleeve 110 and the bottom of the battery box body 100 are connected by welding. Since welding is more stable, the present application preferably uses welding to connect the first sleeve 110 and the bottom of the battery box body 100.

[0053] In this embodiment, the fixing holes 1110 are used to cooperate with the threaded rod and the threaded holes 1010 to connect the second sleeve 111 to the liquid cooling plate 101. The fixing holes 1110 are located on both sides of the second sleeve 111 to match the threaded holes 1010 on the liquid cooling plates 101 on both sides, thereby forming a stable connection point. As a key component for connecting two components, the bolt passes through the fixing holes 1110 of the second sleeve 111 and is tightened with the threaded holes 1010 of the liquid cooling plate 101. During the tightening process, the threads of the bolt interact with the threads in the threaded holes 1010 of the liquid cooling plate 101, generating sufficient pre-tightening force to tightly connect the two components together. This connection not only has sufficient strength to withstand the weight of the battery pack 10 and the forces during the hoisting process, but also has certain seismic resistance performance, ensuring the stable operation of the battery pack 10 under complex working conditions. At the same time, when maintenance is required, the second sleeve 111 can be quickly separated from the liquid cooling plate 101.

[0054] It should be noted that this application does not specifically limit the connection method between the second sleeve 111 and the liquid cooling plate 101, which is set according to the actual application scenario. For example, the second sleeve 111 and the liquid cooling plate 101 can also be connected by welding.

[0055] Please refer to Figures 1 to 8 , in one embodiment, a recessed portion 1120 is provided on the outer periphery of one end of the first sleeve 110, and the second sleeve 111 is sleeved on the recessed portion 1120.

[0056] In this embodiment, the setting of the recessed portion 1120 provides a clear positioning and guiding for the second sleeve 111. When the second sleeve 111 is sleeved on the first sleeve 110, the recessed portion 1120 can ensure that the second sleeve 111 is accurately positioned to the predetermined position and is sleeved along the shape of the recessed portion 1120, thus avoiding deviations and misalignments during the installation process. Specifically, when the second sleeve 111 is sleeved with the recessed portion 1120, internal threads can be provided in the second sleeve 111, and external threads can be provided in the recessed portion 1120, and the second sleeve 111 is sleeved on the recessed portion 1120 through threads.

[0057] Please refer to Figures 1 to 8 , in one embodiment, the hoisting structure 11 of the battery pack 10 further includes a first seal, the first seal is sleeved outside the first sleeve 110, and the first seal seals the installation gap between the first sleeve 110 and the second sleeve 111.

[0058] In this embodiment, the first seal is used to seal the installation gap between the first sleeve 110 and the second sleeve 111, preventing contaminants from entering the interior of the battery pack 10 through the installation gap between the first sleeve 110 and the second sleeve 111, and improving the service life of the battery pack 10. Specifically, the first seal can be an annular sealing ring.

[0059] Please refer to Figures 1 to 8 , in one embodiment, the lifting structure 11 of the battery pack 10 further includes a second seal. A groove is provided on the upper surface of the second sleeve 111, and the groove is annularly arranged around the first sleeve 110. The second seal is disposed in the groove, and the second seal seals the installation gap between the second sleeve 111 and the upper cover 102 of the box body.

[0060] In this embodiment, the groove can limit the movement of the second seal. At the same time, the groove is annularly arranged around the first sleeve 110 to achieve the seal between the upper cover 102 of the box body and the second sleeve 111; the second seal can prevent contaminants from entering the interior of the battery pack 10 through the gap between the second sleeve 111 and the upper cover 102 of the box body. Specifically, the second seal can also be an annular sealing ring.

[0061] Furthermore, the first seal and the second seal are fluororubber or nitrile rubber. Fluororubber can remain stable under extreme temperature conditions, including extremely high working temperatures and extremely low temperatures. And compared with other rubber materials, fluororubber has less permanent deformation when subjected to pressure, which helps to maintain the sealing performance. At the same time, fluororubber can resist the erosion of most chemical substances and still maintain good performance after long-term use, and it also has strong wear resistance. Nitrile rubber has good resistance to various oils, fuels, etc., has high wear resistance, can effectively reduce the wear speed of the sealing ring, improve the service life of the sealing ring, and the nitrile rubber sealing ring can maintain its shape and size stable within a large range and adapt to various complex-shaped sealing surfaces.

[0062] Please refer to Figures 1 to 8 , in one embodiment, a flange 1121 is provided at one end of the first sleeve 110 connected to the bottom of the battery, and the inner surface and the side surface of the flange 1121 are respectively connected to the bottom of the battery pack 10.

[0063] In this embodiment, the flange 1121 is used to support the battery pack 10. Since the pulling force for mounting the battery pack 10 ultimately needs to be transmitted to the bottom of the battery box 100 through the long bolt 112, by setting the flange 1121, the contact area between the lifting structure 11 and the bottom of the battery box 100 can be increased. When the battery pack 10 is loaded on an external mechanism and is subjected to external forces such as vibration during use, the flange 1121 can disperse the pressure over a larger contact area, and the flange 1121 reduces the pressure value per unit area.

[0064] To achieve the object of the present utility model, please refer to Figures 1 to 9 , in one embodiment, the present application further provides a battery pack assembly 1, including a battery pack 10. The battery pack 10 includes a battery box 100, a box upper cover 102, a fixed cross beam 103, and a plurality of liquid cooling plates 101. The fixed cross beam 103 is disposed at one end of the battery box 100, and the end portions of one ends of the plurality of liquid cooling plates 101 are respectively connected to the fixed cross beam 103; and the lifting structure 11 as described in any of the above embodiments, and the lifting structure 11 is used to mount the battery pack 10 on an external mechanism.

[0065] In this embodiment, the battery pack assembly 1 of the present application not only includes the battery pack 10 itself, but also integrates the lifting structure 11 in any of the above embodiments, so that the battery pack 10 can be conveniently and safely mounted on an external mechanism, such as a vehicle chassis, etc.

[0066] Please refer to Figures 1 to 8 , in one embodiment, the plurality of liquid cooling plates 101 are arranged side by side in the width direction of the battery pack 10; two relatively arranged liquid cooling plates 101 are arranged at a position in the middle of the width direction of the battery pack 10, and at least one lifting structure 11 is arranged between the two relatively arranged liquid cooling plates 101.

[0067] In this embodiment, the plurality of liquid cooling plates 101 are arranged side by side in the width direction of the battery pack 10, which is beneficial to evenly disperse the heat generated inside the battery pack 10 and improve the heat dissipation efficiency. Two relatively arranged liquid cooling plates 101 are arranged at the middle position in the width direction of the battery pack 10, further enhancing the heat dissipation capacity of the central region of the battery pack 10. At the same time, the lifting structure 11 is arranged between the two relatively arranged liquid cooling plates 101, so that the second sleeve 111 can be respectively connected to the two relatively arranged liquid cooling plates 101, enhancing the structural stability of the central region of the battery pack 10.

[0068] Please refer to Figures 1 to 8 , in one embodiment, inclined surfaces 1011 are provided on both sides of the contact portion between the liquid cooling plate 101 and the bottom plate of the battery box 100.

[0069] It should be noted that since the liquid cooling plate 101 is connected to the second sleeve 111 and the liquid cooling plate 101 disperses part of the tensile force, the cold plate needs to form a firm connection with the battery box 100 inside the battery box body 100. When the battery box body 100 of the present application is connected to the liquid cooling plate 101, a welding method is used to achieve a firm connection. Therefore, in this embodiment, the inclined surface 1011 of the liquid cooling plate 101 is used to accommodate the welding bead when welding with the battery box body 100, avoiding the welding bead protruding from the box body, and always keeping the welded part of the box body and the liquid cooling plate 101 in a flat state, which is beneficial to protecting the battery module inside the box body and can prevent the battery module from being scratched by the welding bead.

[0070] Please refer to Figures 1 to 8 , in one embodiment, the side plate and / or the bottom plate of the battery box body 100 is a hollow structure, and reinforcing ribs are arranged inside the hollow structure.

[0071] In this embodiment, both the side plate and the bottom plate of the battery box body 100 being hollow structures can reduce the overall weight of the battery pack 10, and can also provide sufficient strength and stiffness to support and protect the internal battery module and other components. The arrangement of reinforcing ribs inside the hollow structure can further enhance the structural strength of the battery box body 100, effectively resist external loads and internal pressures, and prevent the box body from deforming or cracking.

[0072] Exemplarily, the battery box body can have a hollow side plate and a solid bottom plate; or a solid side plate and a hollow bottom plate; or both the side plate and the bottom plate are solid structures. It can be understood that the solid structure box body has a relatively uniform distribution of strength and stiffness in all directions, and has a strong adaptability to resist various types of external forces, such as vertical pressure, lateral force, and torsional force, etc., and is not prone to local deformation or damage; the hollow part inside the hollow structure box body can form air convection with the outside, which is beneficial to heat dissipation. Although the manufacturing process of the hollow structure box body is relatively complex, it can effectively reduce the weight and is beneficial to heat dissipation at the same time. Therefore, in the technical solution of the present application, it is preferably to use both the side plate and the bottom plate as hollow structures to facilitate the overall weight reduction of the external mechanism. For example, when mounted on a vehicle, the entire vehicle is lighter compared to the solid structure.

[0073] The present application does not impose any restrictions on the number and shape of the reinforcing ribs, which can be set according to actual application requirements.

[0074] Please refer to Figures 1 to 8 , in one embodiment, the bottom plate includes a first bottom plate 1000 and a second bottom plate 1001, the first bottom plate 1000 abuts against the inner surface of the flange 1121, and the second bottom plate 1001 abuts against the side surface of the flange 1121.

[0075] As can be seen from the above, the bottom plate of the battery box body 100 is a hollow structure. Therefore, in this embodiment, the first bottom plate 1000 is the bottom plate of the battery box body 100 inside the battery pack 10, and the second bottom plate 1001 is the bottom plate of the battery box body 100 outside the battery pack 10.

[0076] In the above embodiment, the first bottom plate 1000 abuts against the inner surface of the flange 1121, that is, the first bottom plate 1000 is closely attached to the inner side of the flange 1121, forming a stable support surface. This helps to effectively transfer the weight of the battery pack 10 to the flange 1121 and the first sleeve 110, ensuring the stability of the entire battery pack 10 during mounting and use. At the same time, the second bottom plate 1001 abuts against the side surface of the flange 1121, that is, the second bottom plate 1001 extends along the side surface of the flange 1121 and is in close contact with the side surface of the flange 1121. This increases the contact area between the bottom plate and the flange 1121, improves the firmness of the connection, and can also enhance the torsional resistance of the bottom plate to a certain extent. When the battery pack 10 is subjected to lateral force or torque, the second bottom plate 1001 can provide additional support and resistance to prevent the bottom plate from being distorted or deformed. This can ensure that the battery pack 10 maintains a stable posture and performance during mounting and use, improving the overall safety and reliability.

[0077] Please refer to Figures 1 to 9 , the embodiment of the present application further provides an electrical device 16, including a frame body 160; and the battery pack assembly 1 described in any one of the above embodiments, and the hoisting structure mounts the battery pack assembly 1 on the frame body 160.

[0078] In this embodiment, the electrical device 16 can be a vehicle, a ship, a spacecraft, a portable device, a power tool, etc. It can be understood that the technical solutions described in the embodiments of the present application are applicable to all electrical devices including the use of battery components. Exemplarily, the following embodiments are described by taking an electric vehicle as an example.

[0079] Please refer to Figure 9 , the vehicle can be a fuel vehicle or a new energy electric vehicle, and the new energy battery can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. The battery pack assembly 1 is fixedly arranged on the vehicle frame through the hoisting structure of the present application, and the battery pack assembly 1 can be arranged in the middle, head or tail of the vehicle. The battery assembly is used to provide electrical energy for the vehicle. For example, the battery assembly can be used as the operating power source of the vehicle. The vehicle may further include a controller 162 and a motor 161, wherein the controller 162 is used to control the battery assembly to supply power to the motor 161.

[0080] In summary, a hoisting structure 11 of a battery pack 10 according to an embodiment of the present application includes a first sleeve 110, a second sleeve 111, and a long bolt 112. The first sleeve 110 passes through the bottom and the upper cover of the battery pack 10. The second sleeve 111 is sleeved on one end of the first sleeve 110. Both sides of the second sleeve 111 are connected to the liquid cooling plate 101 of the battery pack 10. The other end of the first sleeve 110 is connected to the bottom of the battery pack 10. The long bolt 112 passes through the first sleeve 110 and is connected to an external mechanism. This technical solution adds the second sleeve 111. The second sleeve 111 is respectively connected to the liquid cooling plate 101 inside the battery pack 10. At the same time, the second sleeve 111 is sleeved on the first sleeve 110. The hoisting structure 11 is connected to the liquid cooling plate 101 inside the battery pack 10 through the second sleeve 111. On the basis that there are connection points between the first sleeve 110 and the bottom of the battery pack 10 and the upper cover of the battery pack 10, a connection point between the hoisting structure 11 and the liquid cooling plate 101 inside the battery pack 10 is added, enhancing the overall structure of the battery pack 10.

[0081] Compared with the prior art, a battery assembly according to an embodiment of the present application includes the hoisting structure 11 of the battery pack 10 described in any one of the above. It can be understood that the battery pack assembly 1 of the present application may include all the technical features and technical effects of the hoisting structure 11 of the battery pack 10 described above, which will not be elaborated here.

[0082] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A hoisting structure for a battery pack, which is used to mount the battery pack on an external mechanism, and is characterized in that, Comprising: A first sleeve, a second sleeve and a long bolt. The first sleeve penetrates through the bottom and the upper cover of the battery pack. The second sleeve is sleeved at one end of the first sleeve. Both sides of the second sleeve are respectively connected to the liquid cooling plates of the battery pack. The other end of the first sleeve is connected to the bottom of the battery pack. The long bolt passes through the first sleeve and is connected to an external mechanism.

2. The lifting structure of the battery pack according to claim 1, characterized in that, It further includes a fixing member. The fixing member is sleeved at one end of the first sleeve. The fixing member is used to cooperate with the second sleeve to clamp and fix the upper cover of the battery pack.

3. The lifting structure of the battery pack according to claim 1, characterized in that, Both sides of the second sleeve are provided with fixing holes. The liquid cooling plates of the battery pack are provided with threaded holes. The second sleeve and the liquid cooling plates are connected by bolts passing through the fixing holes on both sides of the second sleeve and the threaded holes of the liquid cooling plates on both sides.

4. The hoisting structure of the battery pack according to claim 1, characterized in that, A recessed portion is provided on the outer periphery of one end of the first sleeve. The second sleeve is sleeved on the recessed portion.

5. The hoisting structure of the battery pack according to claim 1, characterized in that It further includes a first sealing member. The first sealing member is sleeved outside the first sleeve. The first sealing member seals the installation gap between the first sleeve and the second sleeve.

6. The lifting structure of the battery pack according to claim 1, characterized in that, It further includes a second sealing member. A groove is provided on the upper surface of the second sleeve. The groove is arranged in a ring around the first sleeve. The second sealing member is arranged in the groove. The second sealing member seals the installation gap between the second sleeve and the upper cover of the box body.

7. The hoisting structure of the battery pack according to claim 1, characterized in that, A flange is provided at the end of the first sleeve connected to the bottom of the battery. The inner surface and the side surface of the flange are respectively connected to the bottom of the battery pack.

8. A battery pack assembly, characterized in that, Comprising A battery pack, which includes a battery box body, an upper cover of the box body, a fixing cross beam and multiple liquid cooling plates. The fixing cross beam is arranged at one end of the battery box body. One ends of the multiple liquid cooling plates are respectively connected to the fixing cross beam; and the hoisting structure according to any one of claims 1 to 7, and the hoisting structure is used to mount the battery pack on an external mechanism.

9. The battery pack assembly according to claim 8, wherein The multiple liquid cooling plates are arranged side by side along the width direction of the battery pack; wherein two relatively arranged liquid cooling plates are arranged at the middle position in the width direction of the battery pack, and at least one hoisting structure is arranged between the two relatively arranged liquid cooling plates.

10. The battery pack assembly according to claim 8, wherein, Both sides of the contact between the liquid cooling plate and the bottom plate of the battery box body are provided with inclined surfaces.

11. The battery pack assembly according to claim 8, wherein, The side plate and / or the bottom plate of the battery box body is a hollow structure, and a reinforcing rib is arranged in the hollow structure.

12. An electrical device, characterized in that, Comprising a frame body; and the battery pack assembly according to any one of claims 8 - 11, and the hoisting structure mounts the battery pack assembly on the frame body.

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