Battery pack and electric device

Abstract

The application discloses a battery pack and an electric device. The battery pack comprises a box body, a first cross beam, a plurality of single batteries and an electrical module. The box body has a containing cavity. The first cross beam is arranged in the containing cavity and connected with the box body. The first cross beam divides the box body into a first space and a second space in a first direction. The plurality of single batteries are arranged in the first space. The electrical module is arranged in the second space. A first bottom plate is connected with part of the box body and the first cross beam, and covers an opening of the first space in a second direction. A second bottom plate is connected with part of the box body and the first cross beam, and covers an opening of the second space in the second direction. The electrical module has an interface for electrical connection, and the interface is arranged towards the second bottom plate in the second direction. The first bottom plate and the second bottom plate can be separately disassembled when the battery pack is maintained, and the maintenance of the electrical module and the single batteries can be respectively realized. Since the interface of the electrical module is towards the second bottom plate, the electrical module is inverted and locked in the box body, and the convenience of maintenance is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to battery packs and electrical devices. Background Technology

[0002] With the development of integrated batteries, new requirements have emerged for the maintenance of automotive battery packs. When a battery pack malfunctions and needs repair, it is usually necessary to remove the battery pack from the vehicle or seats, resulting in low repair efficiency. At the same time, since the battery pack integrates individual cells, electrical control modules, thermal management systems, and other components, the entire battery pack needs to be opened after the cause of the malfunction is identified in order to repair each of these components individually, making the repair process complex. Summary of the Invention

[0003] Purpose of the invention: This application provides a battery pack and power supply device that allows for maintenance of the vehicle battery system without disassembling the entire battery pack.

[0004] Technical solution: An embodiment of this application provides a battery pack having intersecting first and second directions, including:

[0005] The housing has a receiving cavity;

[0006] A first crossbeam is disposed in the receiving cavity and connected to the box body, and the first crossbeam divides the box body into a first space and a second space in the first direction;

[0007] Multiple individual battery cells are disposed within the first space;

[0008] The electrical module is located within the second space;

[0009] The first base plate is connected to the portion of the box body and the first crossbeam, and covers the opening of the first space along the second direction;

[0010] The second base plate is connected to the portion of the housing 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 disposed along the second direction toward the second base plate.

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

[0012] A liquid cooling plate is disposed between the first base plate and the single cell. The liquid cooling plate has a first surface and a second surface opposite to each other along the second direction. The first surface is connected to the single cell, and the second surface is connected to the first base plate.

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

[0014] A first protrusion is provided in the first space, and the first protrusion extends along the first direction and is partially connected to the third sidewall.

[0015] A second protrusion is provided in the first space, and the second protrusion extends along the first direction and is partially connected to the fourth sidewall.

[0016] A third protrusion is provided in the first space, and the third protrusion extends along the third direction and is partially connected to the first sidewall.

[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 the surface of any one of the third sidewall, the fourth sidewall, and the first sidewall facing the first base plate.

[0018] In some embodiments, the first crossbeam includes a body and a fourth protrusion connected to the body. The fourth protrusion is disposed on the side of the body away from the single cell and extends along the third direction. The fourth protrusion is connected to the third sidewall and the fourth sidewall on both sides along the third direction, respectively.

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

[0020] In some embodiments, the first crossbeam has a groove, the opening of which extends through the body and the fourth protrusion along the second direction, and the groove connects the first space and the second space; the battery pack further includes:

[0021] A sealing block is disposed in the groove and connected to both the body and the fourth protrusion; the sealing block includes a first side surface facing the first base plate along the second direction; along the second direction, the first side surface is flush with the surface of the body facing the first base plate and is connected to the first surface.

[0022] A fifth protrusion is provided in the groove and partially connected to the first side surface; the fifth protrusion is connected to the fourth protrusion; along the second direction, the surface of the fifth protrusion facing the first base plate is flush with the surface of the fourth protrusion facing the first base plate.

[0023] In some embodiments, the sealing block further 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 communicates with the liquid cooling plate.

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

[0025] A battery management unit is located in the second space and connected to the side of the first crossbeam away from the individual battery cell;

[0026] A battery energy distribution unit is located in the second space and connected to the side of the first crossbeam away from the individual battery cell;

[0027] The battery management unit has a first interface, and the battery energy distribution unit has a second interface. Both the first interface and the second interface are arranged towards the second base plate along the second direction.

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

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

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

[0031] The sealing plate is disposed on the side of the first crossbeam facing the first base plate and / or the second base plate and connected to the first crossbeam. The sealing plate is connected to the first base plate and / or the second base plate on the side of the first crossbeam away from the first crossbeam in the second direction.

[0032] In some embodiments, it also includes:

[0033] A top cover plate is disposed along the second direction on the side of the housing away from the first bottom plate and / or the second bottom plate and is connected to the housing, the top cover plate sealing the receiving cavity;

[0034] An insulation component is disposed between the liquid cooling plate and the first base plate and is connected to both the liquid cooling plate and the first base plate.

[0035] In some embodiments, this application also provides an electrical device including a battery pack for supplying power to the electrical device.

[0036] Beneficial Effects: A battery pack according to an embodiment of this application has intersecting first and second directions, including: a housing with a receiving cavity; a first crossbeam disposed in the receiving cavity and connected to the housing, the first crossbeam dividing the housing into a first space and a second space in the first direction; multiple individual batteries disposed in the first space; an electrical module disposed in the second space; a first base plate partially connected to the housing and the first crossbeam, and covering the opening of the first space along the second direction; a second base plate partially connected to the housing 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 being disposed towards the second base plate along the second direction. In this application, the first and second base plates can be disassembled separately during battery pack maintenance, and the electrical module and individual batteries can be repaired separately; since the interface of the electrical module faces the second base plate, the electrical module is inverted and locked into the housing, improving the convenience of maintenance.

[0037] In one embodiment, the liquid cooling plate of this application is disposed in the first space and can be disassembled and repaired separately. At the same time, the liquid cooling plate can be submerged in the housing, and the housing bears the supporting and fixing role of the liquid cooling plate, improving the space utilization rate inside the battery pack. After the liquid cooling plate is fixedly connected to the housing, the second surface of the liquid cooling plate is flush with the surface of the housing and the first crossbeam facing the first bottom plate. The flush setting can facilitate the sealing of the structure at the liquid cooling plate by the subsequent sealing component, simplify 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 serves to isolate the first space and the second space. Since the sealing block is provided with a channel for the cooling medium to enter the liquid cooling plate, the sealing block achieves the sealing of the flow channel interface of the liquid cooling plate. While ensuring that the cooling medium enters the liquid cooling plate, it can also seal the first space and the second space to ensure the normal operation of the single battery and the electrical module.

[0039] The electrical device in this application embodiment may include all the technical features and beneficial effects of the battery pack described above, which will not be repeated here. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the exploded structure of the battery pack provided in this application;

[0042] Figure 2 This is a schematic diagram of the box structure provided in this application;

[0043] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0044] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0045] Figure 5 for Figure 2 A magnified view of a portion of point C in the middle;

[0046] Figure 6 This is an exploded view of the liquid cooling plate and housing provided in this application;

[0047] Figure 7 A schematic diagram showing the liquid cooling plate and housing after installation, as provided in this application;

[0048] Figure 8 for Figure 7 Top view;

[0049] Figure 9 for Figure 8 A schematic diagram of the cross-section along the DD direction at point f;

[0050] Figure 10 for Figure 8 A schematic diagram of the cross-section along the DD direction at point g in the diagram;

[0051] Figure 11 for Figure 8 A schematic diagram of the cross-section along the EE direction at point h in the diagram;

[0052] Figure 12 for Figure 8 A schematic diagram of the cross-section along the EE direction at point i in the diagram;

[0053] Figure 13 This is a schematic diagram of the structure of the sealing block provided in this application;

[0054] Figure 14 A schematic diagram of the cross-section of the sealing block provided in this application;

[0055] Figure 15 A partial schematic diagram of the first crossbeam and sealing block after installation, provided for this application;

[0056] Figure 16 A partial structural diagram of the electrical module installation provided in this application;

[0057] Figure 17 This is an exploded view of the seal and housing provided in this application;

[0058] Reference numerals: 1-Box body, 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-Receiving cavity, 101-First space, 102-Second space, 2-First crossbeam, 20-Groove, 21-Body 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, 40-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-Sealing component, 81-Frame body, 82-Sealing plate, 9-Top cover plate, 10-Insulation component. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0060] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0061] See Figure 1 , Figure 2 and Figure 16A battery pack according to this embodiment has intersecting first direction X and second direction Y, including: a housing 1, a first crossbeam 2, multiple individual batteries 3, an electrical module 4, a first base plate 5 and a second base plate 6; the housing 1 has a receiving cavity 100; the first crossbeam 2 is disposed in the receiving cavity 100 and connected to the housing 1, and the first crossbeam 2 divides the housing 1 into a first space 101 and a second space 102 in the first direction X; multiple individual batteries 3 are disposed in the first space 101; the electrical module 4 is disposed in the second space 102; the first base plate 5 is partially connected to the housing 1 and the first crossbeam 2, and covers the opening of the first space 101 along the second direction Y; the second base plate 6 is partially connected to the housing 1 and the first crossbeam 2, and covers the opening of the second space 102 along the second direction Y; the electrical module 4 has an interface 40 for electrical connection, and the interface 40 is disposed towards the second base plate 6 along the second direction Y.

[0062] Understandably, the battery pack of this application provides protection and support for the internal components through the enclosure 1, the first base plate 5, and the second base plate 6. During battery pack maintenance, the first base plate 5 and the second base plate 6 can be disassembled separately to allow for the separate maintenance of the electrical module 4 and the individual battery cells 3. Since the interface of the electrical module 4 faces the second base plate 6, the electrical module is inverted and locked into the enclosure. This design simplifies electrical wiring, improves connection reliability and stability, and facilitates the disassembly of the electrical module 4 during maintenance. This allows for easier repair and replacement of components within the battery pack, thereby reducing maintenance time and costs.

[0063] In some embodiments, see further. Figure 1 , Figure 2 and Figure 6 The housing 1 includes a first sidewall 11 and a second sidewall 12 opposite to each other along a first direction X; a first crossbeam 2 is located between the first sidewall 11 and the second sidewall 12, and the first sidewall 11 and the first crossbeam 2 at least enclose a first space 101, and the second sidewall 12 and the first crossbeam 2 at least enclose a second space 102. For further details, see [link to relevant documentation]. 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 remaining part of the second side wall 12, the first crossbeam 2, the third side wall 13, and the fourth side wall.

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

[0065] In some embodiments, see further. Figure 2 , Figure 3 , Figure 4 and Figure 5 The housing 1 also has a third direction Z that intersects the first direction X and the second direction Y in pairs; the housing 1 includes a third sidewall 13 and a fourth sidewall 14 disposed opposite each other along the third direction Z; a first crossbeam 2 extends along the third direction Z, and the first crossbeam 2 is connected to the third sidewall 13 and the fourth sidewall 14 on both sides of the third direction Z respectively; the battery pack also includes: a first boss 131, disposed in the first space 101, the first boss 131 extends along the first direction X and is partially connected to the third sidewall 13; a second boss 141, disposed in the first space 101, the second boss 141 extends along the first direction X and is partially connected to the fourth sidewall 14; a third boss 111, disposed in the first space 101, the third boss 111 extends along the third direction Z and is partially connected to the first sidewall 11; see further details. Figure 7 , Figure 8 , Figure 9 , Figure 11 and Figure 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 sidewall 13, the fourth sidewall 14, and the first sidewall 11 facing the first base plate 5.

[0066] It should be noted that the first boss 131, the second boss 141, and the third boss 111 are structures that protrude from the third sidewall 13, the fourth sidewall 14, and the first sidewall 11. Their arrangement is simple and can be used to support the first surface 71 of the liquid cooling plate 7, providing an installation position and fixing the liquid cooling plate 7. By setting the first boss 131, the second boss 141, and the third boss 111, and simultaneously making the second surface 72 of the liquid cooling plate 7 flush with the surfaces of the third sidewall 13, the fourth sidewall 14, and the first sidewall 11, it can be ensured that the liquid cooling plate 7 is submerged in the first space 101, improving the space utilization rate inside the battery pack. At the same time, due to the flush surface arrangement, the liquid cooling plate 7 can be connected to the housing 1, the first boss 131, the second boss 141, and the third boss 111 by friction stir welding or riveting. This further facilitates the subsequent sealing of the structure of the liquid cooling plate 7 by the sealing component 8, simplifies the sealing structure of the liquid cooling plate 7, and can significantly improve the sealing effect.

[0067] In some embodiments, see further. Figure 2 , Figure 3 and Figure 10 The first crossbeam 2 includes a body 21 and a fourth protrusion 22 connected to the body 21. The fourth protrusion 22 is located on the side of the body 21 away from the single cell 3 and extends along the third direction Z. The two sides of the fourth protrusion 22 along the third direction Z are connected to the third side wall 13 and the fourth side wall 14 respectively. The first surface 71 is connected to the body 21 and along the second direction Y. The surface of the fourth protrusion 22 facing the first base plate 5 is flush with the second surface 72.

[0068] It is understandable that by setting 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, the liquid cooling plate 7 and the housing 1 are flush in height after the liquid cooling plate 7 is installed and connected, which facilitates the installation and fixing 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 housing 1, sealing of the liquid cooling plate 7 can be achieved by using sealing components 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 , Figure 13 and Figure 15The first crossbeam 2 has a groove 20, the opening of which penetrates the body 21 and the fourth protrusion 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 disposed in the groove 20 and connected to both the body 21 and the fourth protrusion 22; the sealing block 23 includes a first side 231 facing the first base plate 5 along the second direction Y; along the second direction Y, the first side 231 is flush with the surface of the body 21 facing the first base plate 5 and is connected to the first surface 71; a fifth protrusion 24, which is disposed in the groove 20 and partially connected to the first side 231; the fifth protrusion 24 is connected to the fourth protrusion 22; along the second direction Y, the surface of the fifth protrusion 24 facing the first base plate 5 is flush with the surface of the fourth protrusion 22 facing the first base plate 5.

[0070] It is understood that the groove 20 is used to set the sealing block 23, which is located in the groove 20 and connected to both the body 21 of the first crossbeam 2 and the fourth protrusion 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 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 protrusion 24, the fifth protrusion 24 is also connected to the fourth protrusion 22. The fifth protrusion 24 is used to cooperate with the fourth protrusion 22 to make the liquid cooling plate 7 sink in the first space 102, and the surface of the fifth protrusion 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 the sealing element. The surface of the fifth protrusion 24 facing the first base plate 5 is flush with the surface of the fourth protrusion 22 facing the first base plate 5. This further ensures that the contact area between the liquid cooling plate 7 and the individual battery 3 within the first space 101 is uniform, reducing uneven friction and stress concentration, and guaranteeing the heat dissipation and cooling effect. The sealing block 23 can also have a certain degree of elasticity to achieve the abutment action against the first crossbeam 2 and the liquid cooling plate 7, improving the sealing effect.

[0071] In some embodiments, see further. Figure 13 and Figure 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 communicates with the liquid cooling plate 7. The sealing block 23 is provided with a channel for the cooling medium to enter the liquid cooling plate 7. Therefore, the sealing block 23 achieves the sealing of the interface of the flow channel 230 of the liquid cooling plate 7. While ensuring that the cooling medium enters the liquid cooling plate 7, it can also seal the first space 101 and the second space 102 to ensure the normal operation of the single battery 3 and the electrical module 4.

[0072] In some embodiments, see further. Figure 1 and Figure 16 The electrical module 4 includes a battery management unit 41 and a battery energy distribution unit 42. The battery management unit 41 is located in the second space 102 and connected to the side of the first crossbeam 2 away from the individual battery 3. The battery management unit 41, also known as a BMS (Battery Management System), is a system specifically designed to manage and monitor batteries to ensure the safety, performance, and lifespan of the battery pack. The battery energy distribution unit 42 is located in the second space 102 and connected to the side of the first crossbeam 2 away from the individual battery 3. The battery energy distribution unit 42, also known as a BDU (Battery Energy Distribution Unit), is a device specifically designed to manage and distribute battery energy, controlling and distributing the energy in the battery pack to meet the energy needs 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. Both the first interface 411 and the second interface 421 are positioned along the second direction Y towards the second base plate 6. With the above-described configuration, maintenance can be performed without disassembling the battery pack from the vehicle. Simply raise the vehicle and remove the second base plate 6 to repair the BDU and BMS. Since the BDU and BMS are inverted and locked inside the housing, they can be repaired either inside the battery pack after removing the second base plate 6 or removed from the battery pack for external repair. Therefore, the battery pack structure of this embodiment allows for maintenance of the vehicle battery system without disassembling the entire battery pack. Simply raising the vehicle and removing the corresponding second base plate 6 allows for the repair or replacement of the battery system's BDU and BMS. Similarly, if a faulty individual cell 3 or liquid cooling plate 7 is detected, only the corresponding first base plate 5 needs to be removed for repair or replacement.

[0073] In some embodiments, both the first base plate 5 and the second base plate 6 are detachably connected to the housing. A detachable connection refers to a connection method between two or more components that allows them to be easily connected and separated. This connection method allows components to be disassembled and reconnected as needed for maintenance, replacement, or upgrades. For example, detachable connections include bolted connections, pin connections, and latching connections.

[0074] In some embodiments, see Figure 1 and Figure 17The battery pack also includes a seal 8, which comprises a frame 81 and a sealing plate 82 located within the frame 81 and connected to the inner wall of the frame 81. The sealing plate 82 extends in the third direction Z. A portion of the frame 81 is disposed between the housing 1 and the first bottom plate 5 and is connected to both the housing 1 and the first bottom plate 5. Another portion of the frame 81 is disposed between the housing 1 and the second bottom plate 6 and is connected to both the housing 1 and the second bottom plate 6. The sealing plate 82 is disposed on the side of the first crossbeam 2 facing the first bottom plate 5 and / or the second bottom plate 6 and is connected to the first crossbeam 2. The sealing plate 82 is also connected to the first bottom plate 5 and / or the second bottom plate 6 on the side in the second direction Y away from the first crossbeam 2. It is understood that the presence of the seal 8 effectively prevents the leakage of liquids or gases. The connection method between the frame 81 and the sealing plate 82, as well as their connection to the housing 1, the first bottom plate 5, and the second bottom plate 6, provides good sealing performance, ensuring that liquids or gases inside the battery pack do not leak into 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 housing 1, the first base plate 5, and the second base plate 6 increases the structural stability of the entire system, providing stronger support and fixation, and reducing 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 base plate 5 and the second base plate 6, and is connected to the first crossbeam 2. It provides an additional protective layer to prevent direct contact and damage to the battery from external objects, improving battery safety and durability. The seal 8 can be made of sealing foam, sealing gaskets, or sealant, etc.

[0075] In some embodiments, see further. Figure 1 The battery pack also includes a top cover plate 9 and an insulation component 10. The top cover plate 9 is located along the second direction Y on the side of the housing 1 away from the first bottom plate 5 and / or the second bottom plate 6 and is connected to the housing 1. The top cover plate 9 seals the receiving cavity 100. The insulation component 10 is located between the liquid cooling plate 7 and the first bottom plate 5 and is connected to both the liquid cooling plate 7 and the first bottom plate 5. It is understood that the top cover plate 9 serves to connect and fix the battery pack, ensuring the structural stability and integrity of the battery pack. The insulation component 10, located between the liquid cooling plate 7 and the first bottom plate 5 and connected to both the liquid cooling plate 7 and the first bottom plate 5, provides thermal insulation, keeping the battery's operating temperature within a suitable range, improving battery performance and lifespan. The insulation component 10 also helps to evenly distribute heat inside the battery pack, avoiding hot spot concentration, thereby improving the overall thermal management effect of the battery pack and reducing the risk of thermal runaway.

[0076] In some embodiments, this application also provides an electrical device, including the battery pack provided in this embodiment. The electrical device can be an application device such as a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, and power tool. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0077] The battery pack and power device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack having a first direction, a second direction, and a third direction, wherein the first direction, the second direction, and the third direction intersect each other, characterized in that, include: The housing has a receiving cavity; A first crossbeam is disposed in the receiving cavity and connected to the box body. The first crossbeam divides the box body into a first space and a second space in the first direction. The first crossbeam includes a body and has a groove. The opening of the groove extends through the body along the second direction, and the groove connects the first space and the second space. Multiple individual battery cells are disposed within the first space; The electrical module is located within the second space; The first base plate is connected to the portion of the box body and the first crossbeam, and covers the opening of the first space along the second direction; The second base plate is connected to the portion of the housing 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 base plate. The electrical module is inverted and locked into the housing. A liquid cooling plate is disposed between the first base plate and the single battery cell; A sealing block is disposed in the groove and connected to the body. The sealing block includes a first side facing the first base plate along the second direction and 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 communicates with the liquid cooling plate.

2. The battery pack according to claim 1, characterized in that, The enclosure includes a first sidewall and a second sidewall opposite to each other along the first direction; the first beam is located between the first sidewall and the second sidewall, and the first sidewall and the first beam at least enclose the first space, and the second sidewall and the first beam at least enclose the second space. The liquid cooling plate has a first surface and a second surface opposite to each other along the second direction, the first surface being connected to the single cell and the second surface being connected to the first base plate.

3. A battery pack according to claim 2, characterized in that, The housing includes a third sidewall and a fourth sidewall disposed opposite to each other along the third direction; the first crossbeam extends along the third direction, and the first crossbeam is connected to the third sidewall and the fourth sidewall on both sides of the third direction respectively; the battery pack further includes: A first protrusion is provided in the first space, and the first protrusion extends along the first direction and is partially connected to the third sidewall. A second protrusion is provided in the first space, and the second protrusion extends along the first direction and is partially connected to the fourth sidewall. A third protrusion is provided in the first space, and the third protrusion extends along the third direction and is partially connected to the first sidewall. 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 the surface of any one of the third sidewall, the fourth sidewall, and the first sidewall facing the first base plate.

4. A battery pack according to claim 3, characterized in that, The first crossbeam also includes a fourth protrusion connected to the body. The fourth protrusion is located on the side of the body away from the single battery and extends along the third direction. The fourth protrusion is connected to the third sidewall and the fourth sidewall on both sides along the third direction, respectively. The first surface is connected to the body, and along the second direction, the surface of the fourth protrusion facing the first base plate is flush with the second surface.

5. A battery pack according to claim 4, characterized in that, The opening of the groove extends through the fourth protrusion along the second direction; The sealing block is connected to the fourth protrusion; along the second direction, the first side surface is flush with the surface of the body facing the first base plate and is connected to the first surface. A fifth protrusion is provided in the groove and partially connected to the first side surface; the fifth protrusion is connected to the fourth protrusion; along the second direction, the surface of the fifth protrusion facing the first base plate is flush with the surface of the fourth protrusion facing the first base plate.

6. A battery pack according to claim 1, characterized in that, The electrical module includes: A battery management unit is located in the second space and connected to the side of the first crossbeam away from the individual battery cell; A battery energy distribution unit is located in the second space and connected to the side of the first crossbeam away from the individual battery cell; The battery management unit has a first interface, and the battery energy distribution unit has a second interface. Both the first interface and the second interface are arranged towards the second base plate along the second direction.

7. A battery pack according to claim 3, characterized in that, The battery pack also includes: A sealing element, the sealing element comprising a frame and a sealing plate located within the frame and connected to the inner wall of the frame, the sealing plate extending along the third direction; A portion of the frame is disposed between the box body and the first base plate and is connected to both the box body and the first base plate respectively; another portion of the frame is disposed between the box body and the second base plate and is connected to both the box body and the second base plate respectively. The sealing plate is disposed on the side of the first crossbeam facing the first base plate and / or the second base plate and connected to the first crossbeam. The sealing plate is connected to the first base plate and / or the second base plate on the side of the first crossbeam away from the first crossbeam in the second direction.

8. A battery pack according to claim 2, characterized in that, Also includes: A top cover plate is disposed along the second direction on the side of the box body away from the first bottom plate and / or the second bottom plate and is connected to the box body, and the top cover plate covers the receiving cavity; An insulation component is disposed between the liquid cooling plate and the first base plate and is connected to both the liquid cooling plate and the first base plate.

9. An electrical device, characterized in that, The battery pack includes any one of claims 1-8, the battery pack being used to supply power to the electrical device.

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