Battery pack and electric device

Abstract

The invention discloses a battery pack and a power utilization device, and the battery pack comprises a box body which is provided with a containing cavity; the first cross beam is arranged in the containing cavity and connected with the box body, and the first cross beam divides the box body into a first space and a second space in the first direction; the plurality of single batteries are arranged in the first space; the electrical module is arranged in the second space; the first bottom plate is connected with part of the box body and the first cross beam and covers the opening of the first space in the second direction; the second bottom plate is connected with part of the box body and the first cross beam and covers the opening of the second space in the second direction, the electrical module is provided with an interface used for electrical connection, and the interface is arranged towards the second bottom plate in the second direction. When the battery pack is maintained, the first bottom plate and the second bottom plate can be independently detached, and the electrical module and the single battery are respectively maintained; and the interface of the electrical module faces the second bottom plate, so that the electrical module is locked in the box body in an inverted manner, and the maintenance convenience is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to battery packs and electrical devices. Background Art

[0002] With the development of battery integration, new requirements have emerged for the maintenance of automotive battery packs. When a battery pack fails and needs to be repaired, it is usually necessary to disassemble the battery pack from the vehicle or the seat, resulting in low maintenance efficiency; at the same time, since the battery pack integrates single cells, electrical control modules, thermal management systems and other components, after the cause of the failure is determined, the battery pack needs to be opened in its entirety to repair the above components separately, resulting in complex maintenance conditions. Summary of the invention

[0003] Purpose of the invention: The embodiments of the present application provide a battery pack and an electrical device, which can be used for repairing a vehicle battery system without disassembling the entire battery pack.

[0004] Technical solution: A battery pack according to an embodiment of the present application has a first direction and a second direction intersecting each other, including:

[0005] A box body, wherein the box body has a containing cavity;

[0006] a first crossbeam, disposed in the accommodating cavity and connected to the box body, the first crossbeam dividing the box body into a first space and a second space in the first direction;

[0007] A plurality of single cells are arranged in the first space;

[0008] An electrical module, disposed in the second space;

[0009] a first bottom plate connected to a portion of the box body and the first crossbeam and covering an opening of the first space along the second direction;

[0010] The second bottom plate is connected to part of the box body and the first crossbeam, and covers the opening of the second space along the second direction. The electrical module has an interface for electrical connection, and the interface is arranged along the second direction toward the second bottom plate.

[0011] In some embodiments, the box body includes a first side wall and a second side wall opposite to each other along the first direction; the first crossbeam is located between the first side wall and the second side wall, and the first side wall at least encloses the first space with the first crossbeam, and the second side wall at least encloses the second space with the first crossbeam; the battery pack further includes:

[0012] The liquid cooling plate is arranged between the first bottom plate and the single battery, and has a first surface and a second surface opposite to each other along the second direction, the first surface is connected to the single battery, and the second surface is connected to the first bottom plate.

[0013] In some embodiments, the box body further has a third direction intersecting the first direction and the second direction in pairs; the box body includes a third side wall and a fourth side wall arranged opposite to each other along the third direction; the first crossbeam extends along the third direction, and the first crossbeam is respectively connected to the third side wall and the fourth side wall on both sides of the third direction; the battery pack further includes:

[0014] A first boss, disposed in the first space, the first boss extending along the first direction and connected to a portion of the third side wall;

[0015] a second boss, disposed in the first space, the second boss extending along the first direction and connected to a portion of the fourth side wall;

[0016] a third boss, disposed in the first space, the third boss extending along the third direction and connected to a portion of the first side wall;

[0017] The first surface is connected to any one of the first boss, the second boss, and the third boss, and along the second direction, the second surface is flush with a surface of any one of the third side wall, the fourth side wall, and the first side wall facing the first bottom plate.

[0018] In some embodiments, the first crossbeam includes a body and a fourth boss connected to the body, the fourth boss is disposed on a side of the body away from the single battery and extends along the third direction, and the fourth boss is respectively connected to the third side wall and the fourth side wall on both sides along the third direction;

[0019] The first surface is connected to the body, and along the second direction, a surface of the fourth boss facing the first bottom plate is flush with the second surface.

[0020] In some embodiments, the first beam has a groove, the opening of the groove passes through the body and the fourth boss along the second direction, and the groove communicates the first space and the second space; the battery pack further includes:

[0021] a sealing block, disposed in the groove and connected to both the body and the fourth boss; the sealing block comprises a first side surface facing the first bottom plate along the second direction; along the second direction, the first side surface is flush with a surface of the body facing the first bottom plate and connected to the first surface;

[0022] A fifth boss is disposed in the groove and connected to a portion of the first side surface; the fifth boss is connected to the fourth boss; along the second direction, a surface of the fifth boss facing the first bottom plate is flush with a surface of the four bosses facing the first bottom plate.

[0023] In some embodiments, the sealing block also includes a second side facing the second space along the first direction; the second side is connected to the first side; the sealing block has a flow channel, and the opening of the flow channel passes through the first side and the second side respectively, and is connected to the liquid cooling plate.

[0024] In some embodiments, the electrical module comprises:

[0025] A battery management unit is disposed in the second space and connected to a side of the first beam away from the single battery;

[0026] A battery energy distribution unit is disposed in the second space and connected to a side of the first beam away from the single battery;

[0027] The battery management unit has a first interface, and the battery energy distribution unit has a second interface. Either the first interface or the second interface is arranged along the second direction toward the second bottom plate.

[0028] In some embodiments, the battery pack further comprises:

[0029] A sealing member, the sealing member comprising a frame and a sealing plate located in the frame and connected to an inner wall of the frame, the sealing plate extending along the third direction;

[0030] A portion of the frame is disposed between the box and the first bottom plate and is connected to the box and the first bottom plate respectively; another portion of the frame is disposed between the box and the second bottom plate and is connected to the box and the second bottom plate respectively;

[0031] The sealing plate is arranged on a side of the first cross beam facing the first bottom plate and / or the second bottom plate and connected to the first cross beam, and the side of the sealing plate away from the first cross beam in the second direction is connected to the first bottom plate and / or the second bottom plate.

[0032] In some embodiments, it also includes:

[0033] A top cover plate, arranged along the second direction on a side of the box body away from the first bottom plate and / or the second bottom plate and connected to the box body, the top cover plate covering the accommodating cavity;

[0034] The heat preservation component is arranged between the liquid cooling plate and the first bottom plate and is connected to the liquid cooling plate and the first bottom plate respectively.

[0035] In some embodiments, the present application further provides an electrical device, comprising the battery pack according to any one of claims 1 to 9, wherein the battery pack is used to supply power to the electrical device.

[0036] Beneficial effects: A battery pack according to an embodiment of the present application has a first direction and a second direction intersecting each other, and includes: a box body, the box body having a storage cavity; a first crossbeam, arranged in the storage cavity and connected to the box body, the first crossbeam dividing the box body into a first space and a second space in the first direction; a plurality of single cells arranged in the first space; an electrical module arranged in the second space; a first bottom plate, connected to a portion of the box body and the first crossbeam, and covering the opening of the first space along the second direction; a second bottom plate, connected to a portion of the box body and the first crossbeam, and covering the opening of the second space along the second direction, the electrical module having an interface for electrical connection, and the interface is arranged along the second direction toward the second bottom plate. The present application can separately disassemble the first bottom plate and the second bottom plate when repairing the battery pack, and respectively realize the repair of the electrical module and the single cell; because the interface of the electrical module faces the second bottom plate, the electrical module is inverted and locked in the box body, which improves the convenience of repair.

[0037] In one embodiment, the liquid cooling plate of the present application is arranged in the first space and can be disassembled and repaired separately; at the same time, the liquid cooling plate can be sunk in the box body, and the box body assumes the supporting and fixing function of the liquid cooling plate, thereby improving the space utilization inside the battery pack; and after the liquid cooling plate is fixedly connected to the box body, the second surface of the liquid cooling plate is flush with the surface of the box body and the first cross beam facing the first bottom plate. The flush setting can facilitate the subsequent sealing of the structure at the liquid cooling plate by the sealing member, simplifies the sealing structure of the liquid cooling plate, and can greatly improve the sealing effect.

[0038] In one embodiment, the present application also provides a sealing block on the first crossbeam. Since the first crossbeam isolates the first space and the second space, the sealing block also has the function of isolating the first space and the second space. Since a channel for the cooling medium to enter the liquid cooling plate is provided in the sealing block, the sealing block realizes the sealing of the flow channel interface of the liquid cooling plate. While ensuring that the cooling medium enters the liquid cooling plate, the first space and the second space can also be sealed to ensure the normal operation of the single cell and the electrical module.

[0039] The electric device of the embodiment of the present application may include all the technical features and beneficial effects of the above-mentioned battery pack, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 Schematic diagram of the explosion structure of the battery pack provided for this application;

[0042] Figure 2 Schematic diagram of the box structure provided for this application;

[0043] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0044] Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0045] Figure 5 for Figure 2 A partial enlarged schematic diagram of point C in the middle;

[0046] Figure 6 Schematic diagram of the explosion of the liquid cooling plate and the box provided for this application;

[0047] Figure 7 A schematic diagram of the liquid cooling plate and the box after installation provided in this application;

[0048] Figure 8 for Figure 7 A top view of

[0049] Fig. 9 for Figure 8 Schematic diagram of the cross section along the DD direction at point f in FIG.

[0050] Fig.10 for Figure 8 Schematic diagram of the cross section along the DD direction at g in FIG.

[0051] Fig.11 for Figure 8 Schematic diagram of the cross section along the EE direction at h in FIG.

[0052] Fig.12 for Figure 8 Schematic diagram of the cross section along the EE direction at i in FIG.

[0053] Fig.13 A schematic diagram of the structure of the sealing block provided in this application;

[0054] Fig.14 A schematic cross-sectional view of the sealing block provided for this application;

[0055] Fig.15 A partial schematic diagram of the first crossbeam and the sealing block provided in the present application after installation;

[0056] Fig.16 A schematic diagram of a partial structure of the electrical module installation provided for this application;

[0057] Fig.17 An exploded schematic diagram of the seal and the box provided for this application;

[0058] Figure markings: 1-box, 11-first side wall, 111-third boss, 12-second side wall, 13-third side wall, 131-first boss, 14-fourth side wall, 141-second boss, 100-accommodating chamber, 101-first space, 102-second space, 2-first crossbeam, 20-groove, 21-main body, 22-fourth boss, 23-sealing block, 230-flow channel, 231-first side, 232-second side, 24-fifth boss, 3-single battery, 4-electrical module, 10-interface, 41-battery management unit, 42-battery energy distribution unit, 411-first interface, 421-second interface, 5-first bottom plate, 6-second bottom plate, 7-liquid cooling plate, 71-first surface, 72-second surface, 8-seal, 81-frame, 82-sealing plate, 9-top cover plate, 10-insulation part. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0060] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0061] See also Figure 1 , Figure 2 and Fig.16A battery pack of the present embodiment has a first direction X and a second direction Y intersecting each other, and includes: a box body 1, a first beam 2, a plurality of single cells 3, an electrical module 4, a first bottom plate 5 and a second bottom plate 6; the box body 1 has a accommodating cavity 100; the first beam 2 is disposed in the accommodating cavity 100 and connected to the box body 1, and the first beam 2 divides the box body 1 into a first space 101 and a second space 102 in the first direction X; a plurality of single cells 3 are disposed in the first space 101; the electrical module 4 is disposed in the second space 102; the first bottom plate 5 is connected to a portion of the box body 1 and the first beam 2, and covers an opening of the first space 101 along the second direction Y; the second bottom plate 6 is connected to a portion of the box body 1 and the first beam 2, and covers an opening of the second space 102 along the second direction Y, and the electrical module 4 has an interface 40 for electrical connection, and the interface 40 is disposed along the second direction Y toward the second bottom plate 6.

[0062] It is understandable that the battery pack of the present application provides protection and support for the internal components of the battery pack through the arrangement of the box body 1, the first bottom plate 5 and the second bottom plate 6. When the battery pack is repaired, the first bottom plate 5 and the second bottom plate 6 can be disassembled separately, and the electrical module 4 and the single battery 3 can be repaired respectively; because the interface of the electrical module 4 faces the second bottom plate 6, the electrical module is inverted and locked in the box body. This arrangement can simplify the wiring of the electrical connection, improve the reliability and stability of the connection, and also facilitate the disassembly of the electrical module 4 during maintenance, which can make it easier to repair and replace the components in the battery pack, thereby reducing maintenance time and cost.

[0063] In some embodiments, see further Figure 1 , Figure 2 and Figure 6 The box body 1 includes a first side wall 11 and a second side wall 12 opposite to each other along a first direction X; the first crossbeam 2 is located between the first side wall 11 and the second side wall 12, and the first side wall 11 at least encloses a first space 101 with the first crossbeam 2, and the second side wall 12 at least encloses a second space 102 with the first crossbeam 2. For details, see Figure 2 The first space 101 is enclosed by the first side wall 11, the first crossbeam 2, a part of the third side wall 13 and a part of the fourth side wall 14; the second space is enclosed by the second side wall 12, the first crossbeam 2, the remaining part of the third side wall 13 and the remaining part of the fourth side wall.

[0064] Further, see Figure 7The battery pack further includes a liquid cooling plate 7, which is disposed between the first bottom plate 5 and the single battery 3. The liquid cooling plate 7 has a first surface 71 and a second surface 72 that are opposite to each other along the second direction Y. The first surface 71 is connected to the single battery 3, and the second surface 72 is connected to the first bottom plate 5. It can be understood that the liquid cooling plate 7 absorbs and transfers heat through flowing liquid (usually a coolant), thereby effectively reducing the temperature of the single battery 3.

[0065] In some embodiments, see further Figure 2 , Figure 3 , Figure 4 and Figure 5 The box body 1 also has a third direction Z that intersects the first direction X and the second direction Y in pairs; the box body 1 includes a third side wall 13 and a fourth side wall 14 that are arranged opposite to each other along the third direction Z; the first crossbeam 2 extends along the third direction Z, and the first crossbeam 2 is respectively connected to the third side wall 13 and the fourth side wall 14 on both sides of the third direction Z; the battery pack also includes: a first boss 131, which is arranged in the first space 101, and the first boss 131 extends along the first direction X and is connected to a portion of the third side wall 13; a second boss 141, which is arranged in the first space 101, and the second boss 141 extends along the first direction X and is connected to a portion of the fourth side wall 14; a third boss 111, which is arranged in the first space 101, and the third boss 111 extends along the third direction Z and is connected to a portion of the first side wall 11; see further Figure 7 , Figure 8 , Fig. 9 , Fig.11 and Fig.12 The first surface 71 is connected to any one of the first boss 131, the second boss 141, and the third boss 111, and along the second direction Y, the second surface 72 is flush with the surface of any one of the third side wall 13, the fourth side wall 14, and the first side wall 11 facing the first bottom plate 5.

[0066] It should be noted that the first boss 131, the second boss 141 and the third boss 111 are structures protruding from the third side wall 13, the fourth side wall 14 and the first side wall 11, and the arrangement is simple and can be used to support the first surface 71 of the liquid cooling plate 7, so as to provide an installation position and fix the liquid cooling plate 7; by arranging the first boss 131, the second boss 141 and the third boss 11, and at the same time making the second surface 72 of the liquid cooling plate 7 flush with the surfaces of the third side wall 13, the fourth side wall 14 and the first side wall 11, it can be ensured that the liquid cooling plate 7 is sunk in the first space 101, thereby improving the space utilization rate inside the battery pack; at the same time, due to the flush arrangement of the surfaces, the liquid cooling plate 7 can be connected to the box body 1, the first boss 131, the second boss 141 and the third boss 111 by stir friction welding or riveting, which further facilitates the subsequent sealing of the structure of the liquid cooling plate 7 by the sealing member 8, simplifies the sealing structure of the liquid cooling plate 7, and can greatly improve the sealing effect.

[0067] In some embodiments, see further Figure 2 , Figure 3 and Fig.10 The first cross beam 2 includes a main body 21 and a fourth boss 22 connected to the main body 21, the fourth boss 22 is arranged on a side of the main body 21 away from the single battery 3 and extends along the third direction Z, and the fourth boss 22 is respectively connected to the third side wall 13 and the fourth side wall 14 on both sides along the third direction Z; the first surface 71 is connected to the main body 21, and along the second direction Y, the surface of the fourth boss 22 facing the first bottom plate 5 is flush with the second surface 72.

[0068] It can be understood that by providing the fourth boss 22 and making the second surface 72 of the liquid cooling plate 7 flush with the surface of the fourth boss 22, after the liquid cooling plate 7 is installed and connected to the box body 1, the liquid cooling plate 7 is flush with the height of the box body 1, which is convenient for the installation and fixation of the liquid cooling plate 7. Since the height of the liquid cooling plate 7 after welding or locking is flush with the frame of the box body 1, the sealing of the position of the liquid cooling plate 7 can be achieved by using sealing parts such as sealing foam. Therefore, the flush setting simplifies the structural setting for sealing the liquid cooling plate 7.

[0069] In some embodiments, see further Figure 3 , Fig.13 and Fig.15The first crossbeam 2 has a groove 20, the opening of the groove 20 passes through the body 21 and the fourth boss 22 along the second direction Y, and the groove 20 connects the first space 101 and the second space 102; the battery pack also includes: a sealing block 23, which is arranged in the groove 20 and is connected to both the body 21 and the fourth boss 22; the sealing block 23 includes a first side surface 231 facing the first bottom plate 5 along the second direction Y; along the second direction Y, the first side surface 231 is flush with the surface of the body 21 facing the first bottom plate 5 and is connected to the first surface 71; the fifth boss 24 is arranged in the groove 20 and is connected to a portion of the first side surface 231; the fifth boss 24 is connected to the fourth boss 22; along the second direction Y, the surface of the fifth boss 24 facing the first bottom plate 5 is flush with the surface of the fourth boss 22 facing the first bottom plate 5.

[0070] It is understandable that the groove 20 is used to set the sealing block 23, which is located in the groove 20 and is connected to the main body 21 of the first beam 2 and the fourth boss 22. The presence of the sealing block 23 can effectively prevent the leakage of liquid or gas, improve the sealing performance of the battery pack, and thus protect the safety of the battery and the surrounding environment. At the same time, the first side 231 of the sealing block 23 is flush with the surface of the main body 21 and connected to the first surface 71. This connection method can enhance the sealing between the sealing block 23 and the liquid cooling plate 7; in addition, by setting the fifth boss 24, the fifth boss 24 is also connected to the fourth boss 22. The fifth boss 24 is used to cooperate with the fourth boss 22 to make the liquid cooling plate 7 sink in the first space 102, and the surface of the fifth boss is also flush with the second surface 72 of the liquid cooling plate 7, which further facilitates the subsequent sealing of the liquid cooling plate 7 by setting a seal. The surface of the fifth boss 24 facing the first bottom plate 5 is flush with the surface of the fourth boss 22 facing the first bottom plate 5, which can further ensure that the contact area between the liquid cooling plate 7 and the single battery 3 in the first space 101 is uniform, reduce uneven friction and stress concentration, and ensure the effect of heat dissipation and cooling. The sealing block 23 can also have a certain elasticity to achieve abutment against the first crossbeam 2 and the liquid cooling plate 7 to improve the sealing effect.

[0071] In some embodiments, see further Fig.13 and Fig.14 The sealing block 23 also includes a second side surface 232 facing the second space 102 along the first direction X; the second side surface 232 is connected to the first side surface 231; the sealing block 23 has a flow channel 230, and the opening of the flow channel 230 passes through the first side surface 231 and the second side surface 232 respectively, and is connected to the liquid cooling plate 7. A channel for the cooling medium to enter the liquid cooling plate 7 is provided in the sealing block 23, so the sealing block 23 realizes the sealing of the interface of the flow channel 230 of the liquid cooling plate 7, and can seal the first space 101 and the second space 102 while ensuring the cooling medium to enter the liquid cooling plate 7, so as to ensure the normal operation of the single battery 3 and the electrical module 4.

[0072] In some embodiments, see further Figure 1 and Fig.16 The electrical module 4 includes a battery management unit 41 and a battery energy distribution unit 42. The battery management unit 41 is arranged in the second space 102 and connected to the side of the first beam 2 away from the single battery 3. The battery management unit 41 is also called BMS (Battery Management System), which is a system specially designed to manage and monitor batteries to ensure the safety, performance and life of the battery pack. The battery energy distribution unit 42 is arranged in the second space 102 and connected to the side of the first beam 2 away from the single battery 3. The battery energy distribution unit 42 is called BDU (Battery Energy Distribution Unit), which is a device specially used to manage and distribute battery energy, control and distribute the energy in the battery pack to meet the energy requirements of different components or systems. The battery management unit 41 has a first interface 411, and the battery energy distribution unit 42 has a second interface 421. Either the first interface 411 or the second interface 421 is arranged along the second direction Y toward the second bottom plate 6. With the above arrangement, it is not necessary to disassemble and separate the battery pack from the whole vehicle during maintenance. You only need to raise the whole vehicle and remove the second bottom plate 6 to repair the BDU and BMS. Because the BDU and BMS are inverted and locked inside the box, in addition to disassembling the second bottom plate 6 and repairing it inside the battery pack, you can also disassemble the BDU or BMS outside the battery pack for maintenance. Therefore, the battery pack structure of this embodiment does not need to disassemble the entire battery pack when repairing the vehicle battery system. You only need to raise the whole vehicle and remove the second bottom plate 6 at the corresponding position to repair or replace the BDU and BMS of the battery system. Similarly, if it is found that the single cell 3 or the liquid cooling plate 7 is faulty, it is only necessary to remove the first bottom plate 5 at the corresponding position for repair or replacement.

[0073] In some embodiments, the first bottom plate 5 and the second bottom plate 6 are both detachably connected to the box body. Detachable connection refers to a detachable connection method between two or more components, so that they can be easily connected and separated. This connection method allows the components to be disassembled and reconnected when necessary for maintenance, replacement or upgrading. For example, the detachable connection includes bolt connection, latch connection, lock connection, etc.

[0074] In some embodiments, see Figure 1 and Fig.17The battery pack also includes a seal 8, which includes a frame 81 and a sealing plate 82 located in the frame 81 and connected to the inner wall of the frame 81, and the sealing plate 82 extends along the third direction Z; a part of the frame 81 is arranged between the box 1 and the first bottom plate 5 and is respectively connected to the box 1 and the first bottom plate 5; another part of the frame 81 is arranged between the box 1 and the second bottom plate 6 and is respectively connected to the box 1 and the second bottom plate 6; the sealing plate 82 is arranged on the side of the first beam 2 facing the first bottom plate 5 and / or the second bottom plate 6 and is connected to the first beam 2, and the side of the sealing plate 82 away from the first beam 2 in the second direction Y is connected to the first bottom plate 5 and / or the second bottom plate 6. It can be understood that the presence of the seal 8 can effectively prevent the leakage of liquid or gas, wherein the connection mode of the frame 81 and the sealing plate 82 and the connection with the box 1 and the bottom plates 5 and 6 can provide good sealing performance, ensuring that the liquid or gas inside the battery pack will not leak to the external environment, thereby protecting the safety of the battery and the surrounding environment. The connection between the frame 81 of the seal 8 and the box 1 and the bottom plates 5 and 6 can increase the structural stability of the entire system, provide more solid support and fixation, and reduce the vibration and deformation of the battery pack during operation; the sealing plate 82 is located on the side of the first crossbeam 2 facing the first bottom plate 5 and the second bottom plate 6, and is connected to the first crossbeam 2, which can provide an additional protective layer to prevent external objects from directly contacting and damaging the battery, thereby improving the safety and durability of the battery. The seal 8 can be made of sealing foam, sealing gasket or sealant.

[0075] In some embodiments, see further Figure 1 , the battery pack also includes a top cover plate 9 and a thermal insulation member 10. The top cover plate 9 is arranged on a side of the box body 1 away from the first bottom plate 5 and / or the second bottom plate 6 along the second direction Y and is connected to the box body 1. The top cover plate 9 covers the accommodating cavity 100; the thermal insulation member 10 is arranged between the liquid cooling plate 7 and the first bottom plate 5 and is respectively connected to the liquid cooling plate 7 and the first bottom plate 5. It can be understood that the top cover plate 9 plays a role in connecting and fixing the battery pack to ensure the structural stability and integrity of the battery pack. The thermal insulation member 10 is arranged between the liquid cooling plate 7 and the first bottom plate 5 and is respectively connected to the liquid cooling plate 7 and the first bottom plate 5, providing a thermal insulation effect, keeping the operating temperature of the battery within an appropriate range, and improving the performance and life of the battery. The thermal insulation member 10 can also help to evenly distribute the heat inside the battery pack and avoid the concentration of hot spots, thereby improving the thermal management effect of the entire battery pack and reducing the risk of thermal runaway.

[0076] In some embodiments, the present application also provides an electrical device, including the battery pack provided in this embodiment. Among them, the electrical device can be an application device such as a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, and an electric tool. The vehicle can be a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0077] The battery pack and electrical device provided in the embodiments of the present application are introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A battery pack having a first direction and a second direction intersecting each other, characterized in that: include: A box body, wherein the box body has a containing cavity; a first crossbeam, disposed in the accommodating cavity and connected to the box body, the first crossbeam dividing the box body into a first space and a second space in the first direction; A plurality of single cells are arranged in the first space; An electrical module, disposed in the second space; a first bottom plate connected to a portion of the box body and the first crossbeam and covering an opening of the first space along the second direction; The second bottom plate is connected to part of the box body and the first crossbeam, and covers the opening of the second space along the second direction. The electrical module has an interface for electrical connection, and the interface is arranged along the second direction toward the second bottom plate.

2. A battery pack according to claim 1, characterized in that: The box body includes a first side wall and a second side wall opposite to each other along the first direction; the first crossbeam is located between the first side wall and the second side wall, and the first side wall at least encloses the first space with the first crossbeam, and the second side wall at least encloses the second space with the first crossbeam; the battery pack also includes: The liquid cooling plate is arranged between the first bottom plate and the single battery, and has a first surface and a second surface opposite to each other along the second direction, the first surface is connected to the single battery, and the second surface is connected to the first bottom plate.

3. A battery pack according to claim 2, characterized in that: The box body also has a third direction intersecting the first direction and the second direction in pairs; the box body includes a third side wall and a fourth side wall arranged opposite to each other along the third direction; the first crossbeam extends along the third direction, and the first crossbeam is respectively connected to the third side wall and the fourth side wall on both sides of the third direction; the battery pack also includes: A first boss, disposed in the first space, the first boss extending along the first direction and connected to a portion of the third side wall; a second boss, disposed in the first space, the second boss extending along the first direction and connected to a portion of the fourth side wall; a third boss, disposed in the first space, the third boss extending along the third direction and connected to a portion of the first side wall; The first surface is connected to any one of the first boss, the second boss, and the third boss, and along the second direction, the second surface is flush with a surface of any one of the third side wall, the fourth side wall, and the first side wall facing the first bottom plate.

4. A battery pack according to claim 3, characterized in that: The first crossbeam comprises a body and a fourth boss connected to the body, the fourth boss is arranged on a side of the body away from the single battery and extends along the third direction, and the fourth boss is respectively connected to the third side wall and the fourth side wall on both sides along the third direction; The first surface is connected to the body, and along the second direction, a surface of the fourth boss facing the first bottom plate is flush with the second surface.

5. A battery pack according to claim 4, characterized in that: The first crossbeam has a groove, the opening of the groove passes through the body and the fourth boss along the second direction, and the groove communicates with the first space and the second space; the battery pack further includes: a sealing block, disposed in the groove and connected to both the body and the fourth boss; the sealing block comprises a first side surface facing the first bottom plate along the second direction; along the second direction, the first side surface is flush with a surface of the body facing the first bottom plate and connected to the first surface; A fifth boss is disposed in the groove and connected to a portion of the first side surface; the fifth boss is connected to the fourth boss; along the second direction, a surface of the fifth boss facing the first bottom plate is flush with a surface of the four bosses facing the first bottom plate.

6. A battery pack according to claim 5, characterized in that: The sealing block also includes a second side surface facing the second space along the first direction; the second side surface is connected to the first side surface; the sealing block has a flow channel, and the opening of the flow channel passes through the first side surface and the second side surface respectively and is connected to the liquid cooling plate.

7. The battery pack according to claim 1, characterized in that: The electrical module comprises: A battery management unit is disposed in the second space and connected to a side of the first beam away from the single battery; A battery energy distribution unit is disposed in the second space and connected to a side of the first beam away from the single battery; The battery management unit has a first interface, and the battery energy distribution unit has a second interface. Either the first interface or the second interface is arranged along the second direction toward the second bottom plate.

8. A battery pack according to claim 3, characterized in that: The battery pack further comprises: A sealing member, the sealing member comprising a frame and a sealing plate located in the frame and connected to an inner wall of the frame, the sealing plate extending along the third direction; A portion of the frame is disposed between the box and the first bottom plate and is connected to the box and the first bottom plate respectively; another portion of the frame is disposed between the box and the second bottom plate and is connected to the box and the second bottom plate respectively; The sealing plate is arranged on a side of the first cross beam facing the first bottom plate and / or the second bottom plate and connected to the first cross beam, and the side of the sealing plate away from the first cross beam in the second direction is connected to the first bottom plate and / or the second bottom plate.

9. A battery pack according to claim 2, characterized in that: Also includes: A top cover plate, arranged along the second direction on a side of the box body away from the first bottom plate and / or the second bottom plate and connected to the box body, the top cover plate covering the accommodating cavity; The heat preservation component is arranged between the liquid cooling plate and the first bottom plate and is connected to the liquid cooling plate and the first bottom plate respectively.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9, wherein the battery pack is used to supply power to the electrical device.

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