Battery and electric equipment

Abstract

A battery (100) and electric equipment, the battery (100) comprises a battery box (10) and a battery cell group (20), the battery box (10) comprises a box cover (11) and a frame body (12), the box cover (11) covers the frame body (12), the box cover (11) and the frame body (12) enclose to form a containing cavity (13), the box cover (11) is used for being connected with an external frame body, the battery cell group (20) is contained in the containing cavity (13), and the battery cell group (20) is connected to the box cover (11).

Description

Batteries and electric equipment Technical Field

[0001] The present application belongs to the field of battery technology, and more specifically, relates to a battery and an electric device. Background Art

[0002] With the rapid development of new energy technologies, electric vehicles are becoming more and more popular. Electric vehicles are vehicles that rely on the electricity provided by batteries as a power source for all or part of their working conditions.

[0003] Currently, due to the large weight and low mass energy density of batteries, the endurance performance of electric vehicles is reduced, which is not conducive to the promotion and application of electric vehicles. Therefore, how to reduce the weight of batteries is a technical problem that needs to be solved urgently.

[0004] Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a battery and an electric device to solve the technical problem of heavy battery weight in the related art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is: to provide a battery, including a battery box and a battery cell group, the battery box includes a box cover and a frame, the box cover is arranged on the frame and is enclosed with the frame to form a cavity, the box cover is used to connect to the external frame, the battery cell group is placed in the cavity, and the battery cell group is connected to the box cover.

[0007] The battery provided by the embodiment of the present application has at least the following beneficial effects: the box cover of the battery box in the battery provided by the embodiment of the present application can be connected to the external frame, and the battery cell group is connected to the box cover. In this way, at least part of the load of the battery cell group can be directly transferred to the external frame through the box cover. In other words, at least part of the load of the battery cell group can be borne by the external frame to reduce the load borne by the frame of the battery box. This can reduce the strength requirements of the frame and reduce the size of the frame, such as reducing the height of the frame, thereby effectively reducing the weight of the battery, improving the mass energy density of the battery, and thus effectively improving the endurance performance of the electric device.

[0008] In some embodiments of the present application, the box cover has a first cavity, the frame has a second cavity, the first cavity and the second cavity are interconnected to form a receiving cavity, and at least part of the battery cell group is accommodated in the first cavity.

[0009] By adopting the above technical solution, at least part of the battery cell group can be placed in the first cavity, effectively reducing the depth requirement of the second cavity. In this way, the depth of the second cavity can be reduced by reducing the height of the frame, thereby further reducing the weight of the battery, further improving the mass energy density of the battery, and further improving the endurance performance of the electric device.

[0010] In some embodiments of the present application, the maximum depth of the second cavity is smaller than the maximum depth of the first cavity; and / or the minimum depth of the second cavity is smaller than the maximum depth of the first cavity.

[0011] By adopting the above technical solution, more volume of the battery cell group can be accommodated in the first cavity, further reducing the depth requirement of the second cavity, and further reducing the height dimension of the frame, thereby further reducing the weight of the frame and the total weight of the battery, further improving the mass energy density of the battery, and further improving the endurance performance of the electric device.

[0012] In some embodiments of the present application, the frame includes a first support beam, the first support beam includes a support beam body and an energy-absorbing beam body, and the energy-absorbing beam body is connected to a side of the support beam body facing away from the cavity.

[0013] By adopting the above technical solution, when the outer side of the battery is impacted by external force, the energy-absorbing beam can effectively absorb the impact energy, thereby effectively improving the situation where the impact energy is transmitted to the battery cell group through the frame, and effectively reducing the risk of damage to the battery cell group.

[0014] In some embodiments of the present application, the energy-absorbing beam includes a main beam, which is connected to a side of the supporting beam facing away from the cavity and has a first energy-absorbing cavity.

[0015] By adopting the above technical solution, when the outer side of the battery is impacted by external force, the main beam can collapse and deform inward, thereby effectively absorbing the impact energy.

[0016] In some embodiments of the present application, the energy absorbing beam further includes a first energy absorbing body, and the first energy absorbing body is disposed in the first energy absorbing cavity.

[0017] By adopting the above technical solution, when the outer side of the battery is impacted by external force, the impact energy can be transmitted to the first energy-absorbing body through the main beam, causing the main beam and the first energy-absorbing body to deform in turn, so that the energy-absorbing beam can absorb the impact energy more effectively, further reducing the risk of damage to the battery cell group.

[0018] In some embodiments of the present application, the first energy absorbing body is an energy absorbing rib and extends along the length direction of the main beam body, and the first energy absorbing body is connected between two opposite walls of the main beam body.

[0019] By adopting the above technical solution, impact energy can be absorbed more effectively, thereby further reducing the risk of damage to the battery cell pack.

[0020] In some embodiments of the present application, the first support beam extends along the length direction of the battery and is located on one side of the battery along the width direction.

[0021] By adopting the above technical solution, when the battery is subjected to external force impact on one side along the width direction, the energy-absorbing beam can effectively absorb the impact energy, thereby reducing the risk of damage to the battery cell group.

[0022] In some embodiments of the present application, the battery box further includes a protective plate covering the side of the frame body facing away from the box cover, and the protective plate has a second energy absorption cavity.

[0023] By adopting the above technical solution, when the bottom of the battery is impacted by external force, the protective plate can collapse and deform inward to absorb the impact energy, thereby effectively improving the transmission of impact energy to the battery cell group and effectively reducing the risk of damage to the battery cell group.

[0024] In some embodiments of the present application, the guard plate includes a first plate body, a second plate body and a second energy absorbing body. The first plate body and the second plate body are spaced apart along the height direction of the battery to form a second energy absorbing cavity. The second energy absorbing body is arranged in the second energy absorbing cavity.

[0025] By adopting the above technical solution, when the bottom of the battery is impacted by external force, the impact energy can be transferred to the second energy absorber, causing the second energy absorber to deform, so that the protective plate can more effectively absorb the impact energy, further reducing the risk of damage to the battery cell pack.

[0026] In some embodiments of the present application, the second energy absorbing body is an energy absorbing rib, and the second energy absorbing body is connected between the first plate and the second plate.

[0027] By adopting the above technical solution, impact energy can be absorbed more effectively, thereby further reducing the risk of damage to the battery cell pack.

[0028] In some embodiments of the present application, the thickness direction of the second energy absorber is relatively inclined to the height direction of the battery.

[0029] By adopting the above technical solution, the second energy-absorbing body can be quickly collapsed and deformed when subjected to external force impact, thereby more effectively absorbing the impact energy and further reducing the risk of damage to the battery cell group.

[0030] In some embodiments of the present application, there are multiple second energy absorbers, and the multiple second energy absorbers are arranged in parallel along a direction perpendicular to the length direction of the second energy absorbers, and the thickness directions of two adjacent second energy absorbers are inclined in different directions relative to the height direction of the battery.

[0031] By adopting the above technical solution, when the guard plate is impacted by external force, at least part of the impact energy received by two adjacent second energy-absorbing bodies can offset each other, thereby effectively improving the impact bearing capacity of the guard plate and further reducing the risk of damage to the battery cell group.

[0032] In some embodiments of the present application, the second energy absorber extends along the width direction of the battery.

[0033] By adopting the above technical solution, the impact resistance of the protective plate in the width direction of the battery is effectively improved. In this way, when the battery is impacted by external force on one side along the width direction, the protective plate can effectively withstand the impact energy, thereby effectively reducing the risk of damage to the battery cell pack.

[0034] In some embodiments of the present application, in a direction perpendicular to the length direction of the first support beam, at least a portion of the energy-absorbing beam protrudes from the guard plate.

[0035] By adopting the above technical solution, when the battery is impacted by external force, the energy-absorbing beam can first absorb the impact energy, thereby effectively reducing the risk of the impact energy being transmitted to the guard plate.

[0036] In some embodiments of the present application, the battery box further includes a protective plate, and the protective plate cover is provided on a side of the frame body facing away from the box cover.

[0037] By adopting the above technical solution, when the bottom of the battery is impacted by external force, the protective plate can effectively absorb the impact energy, thereby reducing the risk of damage to the battery cell pack.

[0038] In some embodiments of the present application, the battery cell group is connected to the protective plate.

[0039] By adopting the above technical solution, the battery cell group can be connected between the box cover and the guard plate, thereby improving the shaking of the battery cell group and effectively improving the reliability of the battery.

[0040] In some embodiments of the present application, the battery box further includes a seal, which is disposed between the frame and the guard plate.

[0041] By adopting the above technical solution, the sealing performance of the battery is effectively improved, thereby effectively improving the safety of the battery.

[0042] In some embodiments of the present application, the battery further includes a first thermal management component, which is disposed between the battery cell group and the guard plate and attached to the battery cell group.

[0043] By adopting the above technical solution, the heat exchange performance of the battery is effectively improved, thereby effectively improving the safety of the battery.

[0044] In some embodiments of the present application, the frame is used to connect to an external frame.

[0045] By adopting the above technical solution, the connection stress between the frame and the box cover is effectively reduced, thereby effectively reducing the risk of fracture at the connection portion between the frame and the box cover.

[0046] In some embodiments of the present application, the battery box further includes a mounting assembly, the box cover is connected to the mounting assembly, and the mounting assembly is used to connect to an external frame.

[0047] By adopting the above technical solution, it is convenient to connect the box cover to the external frame.

[0048] In some embodiments of the present application, at least part of the mounting assembly includes a support member and a first connecting member, the support member is connected to the box cover, and the first connecting member is connected to the support member and is used to connect to the external frame.

[0049] By adopting the above technical solution, it is convenient to connect the box cover to the external frame.

[0050] In some embodiments of the present application, the box cover includes an upper wall, the battery cell group is connected to the lower portion of the upper wall, the support member is connected to the upper wall, and the first connecting member connects the support member and the upper wall to the external frame.

[0051] By adopting the above technical solution, the strength of the upper wall of the box cover is effectively improved, thereby effectively improving the bearing capacity of the upper wall of the box cover for the battery cell group.

[0052] In some embodiments of the present application, the support member is connected to the upper portion of the upper wall and extends along the width direction of the battery.

[0053] By adopting the above technical solution, the impact resistance of the upper wall of the box cover in the width direction of the battery is effectively improved, and the risk of the box cover being deformed when the battery is impacted by external force on one side along the width direction is effectively reduced, thereby effectively reducing the risk of damage to the battery cell pack.

[0054] In some embodiments of the present application, the battery box further includes a constraint structure provided on the box cover, and the constraint structure is used to constrain the expansion of the battery cell group.

[0055] By adopting the above technical solution, under the restraining effect of the restraining structure, the expansion force of the battery cell group can be resisted, thereby limiting the expansion and deformation of the battery cell group, and effectively improving the safety performance of the battery.

[0056] In some embodiments of the present application, the restraint structure includes two beam structures spaced apart from each other, and the two beam structures cooperate to clamp the battery cell group.

[0057] By adopting the above technical solution, under the clamping action of the two beam structures, the expansion force of the battery cell group can be resisted, thereby limiting the expansion and deformation of the battery cell group and effectively improving the safety performance of the battery.

[0058] In some embodiments of the present application, the box cover includes an upper wall and side walls, the beam structure extends along the width direction of the battery, and the beam structure is connected to at least one of the upper wall and the side walls.

[0059] By adopting the above technical solution, the installation operation of the beam structure is facilitated, so that the two beam structures can clamp the battery cell group more effectively, and the impact resistance of the box cover along the width direction of the battery can be improved, so that the box cover can effectively withstand the impact force when the battery is impacted by external force on one side along the width direction, effectively reducing the risk of deformation of the box cover, thereby effectively reducing the risk of damage to the battery cell group.

[0060] In some embodiments of the present application, the beam structure includes a transition piece and a beam body, the transition piece includes a matching portion and an installation portion that are connected to each other, the matching portion is shaped to match at least part of the inner wall surface of the side wall and are connected to each other, and the beam body is connected to the installation portion.

[0061] By adopting the above technical solution, by connecting the matching part and at least part of the inner wall surface of the side wall, and installing the beam body on the mounting part of the adapter, the beam body can be connected to the side wall through the adapter, thereby effectively improving the connection strength between the beam body and the box cover, thereby effectively reducing the risk of deformation or displacement of the beam body, and effectively improving the reliability of the battery.

[0062] In some embodiments of the present application, the constraint structure further includes a second connecting member connected between the two beam structures.

[0063] By adopting the above technical solution, the relative positions of two adjacent beam structures are effectively restricted, thereby further reducing the risk of deformation or displacement of the beam structures.

[0064] In some embodiments of the present application, the second connecting member is connected to a side of the beam structure facing away from the box cover.

[0065] By adopting the above technical solution, the risk of interference between the second connecting member and the battery cell group is effectively reduced, making it easier to connect the second connecting member to the beam structure.

[0066] In some embodiments of the present application, the battery cell group includes a plurality of battery cells, and the battery further includes a second thermal management component, which is attached between two adjacent battery cells; and / or, the battery further includes a third thermal management component, which is arranged between the battery cell group and the box cover and attached to the battery cell group.

[0067] By adopting the above technical solution, the heat exchange performance of the battery is effectively improved, thereby effectively improving the safety of the battery.

[0068] In some embodiments of the present application, the battery cell group is bonded to the box cover.

[0069] By adopting the above technical solution, the force between the battery cell group and the box cover can be made more uniform, and the assembly process of the battery cell group and the box cover can be simplified, thereby effectively improving the assembly efficiency of the battery.

[0070] An embodiment of the present application further provides an electric device, comprising a frame and the battery described in any one of the above embodiments, wherein a box cover is connected to the frame.

[0071] The electric device provided by the embodiments of the present application has at least the following beneficial effects: the electric device provided by the embodiments of the present application effectively improves the endurance performance of the electric device due to the use of the battery described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0073] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0074] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application;

[0075] FIG3 is a schematic diagram of the exploded structure of the battery shown in FIG2 ;

[0076] FIG4 is a first exploded structural diagram of the box cover, the restraining structure, and the mounting assembly in the battery shown in FIG2 ;

[0077] FIG5 is a second exploded structural diagram of the box cover, restraint structure, and mounting assembly in the battery shown in FIG2 ;

[0078] FIG6 is a schematic structural diagram of a protective plate in the battery shown in FIG3 ;

[0079] FIG7 is a schematic diagram of the front structure of the guard plate shown in FIG6;

[0080] FIG8 is an enlarged structural diagram of position B of the guard plate shown in FIG7;

[0081] FIG9 is a schematic cross-sectional view of the battery shown in FIG2 along line AA;

[0082] FIG10 is an enlarged structural diagram of a portion C of the battery shown in FIG9 ;

[0083] FIG11 is a schematic diagram of an exploded structure of a battery provided in another embodiment of the present application;

[0084] FIG12 is a schematic diagram of an exploded structure of a battery provided in yet another embodiment of the present application;

[0085] FIG13 is a schematic structural diagram of a battery cell provided in an embodiment of the present application;

[0086] FIG14 is a schematic diagram of the top structure of the battery cell shown in FIG13;

[0087] FIG15 is a schematic cross-sectional view of the battery cell shown in FIG14 along line DD.

[0088] 14. The second energy absorbing body; 142. The first energy absorbing body; 143. The second energy absorbing body; 144. The second energy absorbing body; 15. The sealing member; 16. The mounting assembly; 161. The supporting member; 162. The first connecting member; 17. The restraining structure; 171. The beam structure; 1711. The transfer Part; 1711a, first adapter; 1711b, second adapter; 17111, matching part; 17111a, first matching part; 17111b, second matching part; 17112, mounting part; 1712, beam body; 1713, first fastener; 172, second connecting part; 173, second fastener; 18, connecting sleeve; 20, battery cell group; 21, battery cell; 211, shell; 212, electrode assembly; 213, electrode terminal; 30, first thermal management component; 40, second thermal management component; 50, third thermal management component; 200, frame; 300, electric drive device; 400, wheel. DETAILED DESCRIPTION

[0089] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0090] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0091] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0093] An electric vehicle is a vehicle that relies on electricity for all or part of its operation. It consists of a vehicle frame, a battery, and an electric drive unit. The battery is typically mounted at the bottom of the frame, while the electric drive unit is typically installed at the front or rear of the frame. The battery provides electrical energy to the electric drive unit, which converts this electrical energy into mechanical energy to propel the vehicle.

[0094] In related technologies, a battery consists of a battery box and a cell pack housed within it. The box's frame is connected to the vehicle frame to support the entire battery. However, because the frame must bear the entire load of the battery, improving its load-bearing capacity requires increasing its overall dimensions, particularly its height. This significantly increases the battery's weight, leading to a significant decrease in its mass energy density, hindering the vehicle's endurance.

[0095] In order to reduce the weight of the battery, the cover of the battery box of the battery provided in the embodiment of the present application can be connected to the frame, and the battery cell group is connected to the cover. In this way, at least part of the load of the battery cell group can be directly transferred to the frame through the cover. In other words, at least part of the load of the battery cell group can be borne by the frame to reduce the load borne by the frame of the battery box. This can reduce the strength requirements of the frame and reduce the size of the frame, such as reducing the height of the frame, thereby effectively reducing the weight of the battery, improving the mass energy density of the battery, and effectively improving the endurance performance of the electric vehicle.

[0096] The battery provided in the embodiments of the present application can be used in electric devices, which may be, but are not limited to, vehicles, portable devices, ships, spacecraft, electric toys, and electric tools, etc. The vehicle may be a fuel vehicle, a gas vehicle, or an electric vehicle, and the electric vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric 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, etc.

[0097] For the convenience of description, the following embodiments are described by taking an electric device according to an embodiment of the present application as a vehicle as an example.

[0098] Please refer to FIG1 , which is a schematic structural diagram of a vehicle 1000 according to an embodiment of the present application. The vehicle 1000 includes a frame 200 , a battery 100 , and an electric drive device 300 .

[0099] The frame 200 is the primary supporting component of the vehicle 1000. The frame 200 comprises an engine compartment and a passenger compartment. The engine compartment houses the vehicle 1000's electric drive unit 300, transmission, cooling system, and other components, while the passenger compartment provides operating and seating space for the driver and passengers. When the vehicle 1000 is a front-wheel drive vehicle, the engine compartment is located at the front of the frame 200; that is, the engine compartment is the front compartment. When the vehicle 1000 is a rear-wheel drive vehicle, the engine compartment is located at the rear of the frame 200; that is, the engine compartment is the rear compartment. When the vehicle 1000 is a four-wheel drive vehicle, the engine compartment is divided into a front compartment and a rear compartment, with the front compartment located at the front of the frame 200 and the rear compartment located at the rear of the frame 200. The passenger compartment is located between the front and rear portions of the frame 200.

[0100] The battery 100 is used to provide electric energy for the electric drive device 300 . The battery 100 may be disposed at the bottom of the vehicle frame 200 . For example, the battery 100 may be disposed below the cockpit of the vehicle frame 200 .

[0101] The electric drive device 300 is used to convert the electrical energy provided by the battery 100 into mechanical energy and output this mechanical energy to the wheels 400 of the vehicle 1000 to drive the vehicle 1000. Of course, if the vehicle 1000 has a kinetic energy recovery function, the electric drive device 300 can also function as a generator to convert mechanical energy into electrical energy and transmit and store the generated electrical energy in the battery 100. The electric drive device 300 is installed in the engine compartment. Specifically, when the vehicle 1000 is a front-wheel drive vehicle, the electric drive device 300 is installed at the front of the vehicle 1000 and is used to output the above-mentioned mechanical energy to the front wheels 400 of the vehicle 1000 to drive the vehicle 1000 to move; when the vehicle 1000 is a rear-wheel drive vehicle, the electric drive device 300 is installed at the rear of the vehicle 1000 and is used to output the above-mentioned mechanical energy to the rear wheels 400 of the vehicle 1000 to drive the vehicle 1000 to move; when the vehicle 1000 is a four-wheel drive vehicle, there can be two electric drive devices 300, one electric drive device 300 is installed at the front of the vehicle 1000 and is used to output the above-mentioned mechanical energy to the front wheels 400 of the vehicle 1000, and the other electric drive device 300 is installed at the rear of the vehicle 1000 and is used to output the above-mentioned mechanical energy to the rear wheels 400 of the vehicle 1000 to drive the vehicle 1000 to move.

[0102] The battery 100 provided in the embodiment of the present application is described below with reference to the accompanying drawings. For the convenience of description, the direction parallel to the central axis of the wheel 400 of the vehicle 1000 is defined as the width direction of the battery 100. It should be noted that the central axis of the wheel 400 refers to the central axis of the wheel 400 when the driving direction of the vehicle 1000 is a straight line, such as the positive and negative directions of the Y axis shown in Figures 1 to 6 and Figures 9 to 12. The direction perpendicular to the central axis of the wheel 400 and parallel to the support plane of the vehicle 1000 is defined as the length direction of the battery 100. It should be noted that the central axis of the wheel 400 is the central axis of the wheel 400 when the driving direction of the vehicle 1000 is a straight line. The support plane refers to a plane that is tangent to the wheel surface of all wheels 400 of the vehicle 1000 on the side facing away from the frame 200 when the vehicle 1000 is in a driving state or a stationary state, such as the positive and negative directions of the X-axis shown in Figures 1 to 8 and Figures 11 and 12. The direction perpendicular to the above-mentioned width direction and the above-mentioned length direction is defined as the height direction of the battery 100, such as the positive and negative directions of the Z-axis shown in Figures 3 to 12. The direction from the battery 100 to the above-mentioned support plane and perpendicular to the above-mentioned support plane is defined as the gravity direction of the battery 100, such as the negative direction of the Z-axis shown in Figures 3 to 12.

[0103] First, please refer to Figures 2, 3, 9, 11 and 12 together. An embodiment of the present application provides a battery 100, including a battery box 10 and a battery cell group 20. The battery box 10 includes a box cover 11 and a frame 12. The box cover 11 is arranged on the frame 12 and is enclosed with the frame 12 to form a cavity 13. The box cover 11 is used to connect to the frame 200. The battery cell group 20 is accommodated in the cavity 13, and the battery cell group 20 is connected to the box cover 11.

[0104] The battery box 10 is used to provide a storage space for the battery cell group 20. The internal space of the above-mentioned cavity 13 constitutes the storage space. The box cover 11 and the frame 12 are connected in sequence along the gravity direction of the battery 100 and enclose the above-mentioned cavity 13. The box cover 11 is placed on the frame 12 and connected to the frame 12. The connection method between the box cover 11 and the frame 12 can be but is not limited to welding, fastening connection, bonding, etc.

[0105] The cover 11, as part of the battery case 10, is used to seal one end of the opening of the cavity 13. In this embodiment, the cover 11 also supports at least part of the load of the battery 100. For example, the cover 11 supports at least part of the load of the cell pack 20. In some embodiments, the cover 11 can be a plate-shaped structure and cover the frame 12. In other embodiments, the cover 11 can be a hollow structure and cover the frame 12, with the cavity of the cover 11 forming part of the cavity 13. The cover 11 can be made of, but not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. In some embodiments, the cover 11 can be an integrally molded component, i.e., it is formed using a one-piece molding process such as, but not limited to, die-casting or casting. In other embodiments, the cover 11 can be a split, connected component, for example, comprising multiple parts that are separately molded and then interconnected. The connection between the parts can be, but not limited to, welding, fastening, or bonding, and the materials of the parts can be the same or different. When the box cover 11 is connected to the vehicle frame 200 , the connection between the box cover 11 and the vehicle frame 200 may be, but is not limited to, fastening connection, welding, hook connection, etc.

[0106] The frame 12 is a supporting component of the battery box 10. The material of the frame 12 can be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. The shape of the frame 12 can be, but is not limited to, circular, rectangular, square, etc. In some embodiments, the frame 12 can be an integrally formed component, that is, the frame 12 is made using an integral forming process, and the integral forming process can be, but is not limited to, a die-casting process, a casting process, etc. In other embodiments, the frame 12 can also be a split connecting component, for example, the frame 12 includes multiple parts, and the multiple parts are connected to each other after being formed separately. The connection method between the various parts can be, but is not limited to, welding, fastening connection, mortise and tenon connection, etc., and the materials of the various parts can be the same or different. When the battery 100 is assembled to the frame 200, the frame 12 can be connected to the frame 200 or not.

[0107] The cell pack 20 is the main component of the battery 100, used for storing electrical energy. The cell pack 20 is connected to the case cover 11. The connection between the cell pack 20 and the case cover 11 can be, but is not limited to, bonding, welding, or fastening. The cell pack 20 includes a battery cell 21, which is the smallest storage unit for storing electrical energy. (See Figures 13 and 14 for details.) The battery cell 21 includes a housing 211, an electrode assembly 212, and electrode terminals 213.

[0108] The housing 211 is a component used to provide an internal environment for the battery cell 21, which can accommodate the electrode assembly 212 and other functional components of the battery cell 21. The shape of the housing 211 can be, but is not limited to, a rectangular parallelepiped, a cylinder, a hexagonal prism, etc., and it is understood that the shape of the housing 211 can be determined based on the specific shape of the electrode assembly 212. The material of the housing 211 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0109] The electrode assembly 212 is a component in the battery cell 21 where electrochemical reactions occur. The number of electrode assemblies 212 can be one or more. The electrode assembly 212 is mainly made of a positive electrode sheet, a negative electrode sheet and a separator using a winding process or a stacking process. During the charge and discharge process of the battery cell 21, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode sheet and the negative electrode sheet. The separator is arranged between the positive electrode sheet and the negative electrode sheet, which can prevent the positive and negative electrodes from short-circuiting and allow active ions to pass through. Among them, the positive electrode sheet may include a positive electrode collector, a positive electrode ear and a positive electrode active material. The positive electrode ear is connected to the positive electrode collector, and the positive electrode active material is arranged on at least one surface of the positive electrode collector. As an example, the positive electrode collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is arranged on any one or both of the two opposite surfaces of the positive electrode collector. The negative electrode sheet may include a negative electrode collector, a negative electrode ear and a negative electrode active material. The negative electrode tab is connected to the negative electrode current collector, and the negative electrode active material is disposed on at least one surface of the negative electrode current collector. For example, the negative electrode current collector has two surfaces that face each other in the thickness direction, and the negative electrode active material is disposed on either or both of the two opposing surfaces of the negative electrode current collector. The separator is a separator. This application does not specifically limit the type of separator; any known porous separator with good chemical and mechanical stability may be used.

[0110] The electrode terminal 213 is a component electrically connected to the electrode assembly 212 for outputting electrical energy from or inputting electrical energy into the battery cell 21. The electrode terminal 213 can be disposed on the housing 211. A portion of the electrode terminal 213 extends into the interior of the battery cell 21 and is directly or indirectly connected to the positive or negative tab of the electrode assembly 212. Another portion of the electrode terminal 213 is exposed to the exterior of the battery cell 21 and is connected to components such as a busbar and a sampling device. The electrode terminal 213 can have a columnar structure, such as a cylindrical or prismatic structure. It can also have a plate-like structure, such as a circular or square plate. It can also have other irregular three-dimensional structures, which are not specifically limited here. The electrode terminal 213 can be made of a single conductive material or multiple conductive materials. The conductive materials can include, but are not limited to, copper, aluminum, nickel, zinc, iron, and the like, which are not specifically limited here.

[0111] The number of battery cells 21 can be multiple, and the multiple battery cells 21 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to multiple battery cells 21 being connected both in series and in parallel. The battery cells 21 can be secondary batteries or primary batteries. A secondary battery refers to a battery cell 21 that can be recharged to activate its active material after discharge and continue to be used. A primary battery refers to a battery cell 21 that cannot be recharged to activate its active material after the battery cell 21's energy is exhausted and continues to be used. The battery cells 21 can also be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., but are not limited to these. The battery cells 21 can be cylindrical, prismatic, soft-pack, or other shaped battery cells. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery cells. Polygonal prismatic battery cells, for example, hexagonal prismatic battery cells, are not particularly limited in this application.

[0112] In some embodiments, multiple battery cells 21 can be directly connected in series, in parallel, or in a mixed manner, and then the battery cell group 20 formed by the multiple battery cells 21 is housed in the battery box 10. The housing 211 is connected to the box cover 11, and the electrode terminals 213 are provided on other parts of the housing 211 except for the part used for connection to the box cover 11. For example, the electrode terminals 213 are provided on the side of the housing 211 facing away from the box cover 11 along the height direction of the battery 100. In this case, the battery cells 21 can be square-shell battery cells, cylindrical battery cells, or prismatic battery cells. For another example, the electrode terminals 213 are provided on one side or two opposite sides of the housing 211 along the width direction of the battery 100. In this case, the battery cells 21 can be blade-shaped battery cells. For another example, the electrode terminals 213 are provided on one side or two opposite sides of the housing 211 along the length direction of the battery 100. In this case, the battery cells 21 can be blade-shaped battery cells.

[0113] In other embodiments, the battery 100 may also be a battery module formed by first connecting multiple battery cells 21 in series, parallel, or in a mixed series connection. The multiple battery modules are then connected in series, parallel, or in a mixed series connection to form a battery cell group 20 and housed within the battery case 10. The battery module includes a housing and electrical leads. The multiple battery cells 21 are housed within the housing. The electrical leads are directly or indirectly connected to the electrode terminals 213 of the battery cells 21 to output electrical energy from or input electrical energy into the battery cells 21. The housing is directly connected to the case cover 11, and the electrical leads are provided at locations other than the location for connection to the case cover 11. For example, the electrical leads are provided on a side of the housing facing away from the case cover 11 along the height direction of the battery 100. For another example, the electrical leads are provided on one side or two opposite sides of the housing along the width direction of the battery 100. For another example, the electrical leads are provided on one side or two opposite sides of the housing along the length direction of the battery 100.

[0114] In some embodiments, when the battery 100 is assembled to the frame 200, the box cover 11 and the frame 12 are connected in sequence along the gravity direction of the battery 100, the side of the box cover 11 facing away from the frame 12 is used to connect to the frame 200, and the battery cell group 20 is connected to the side of the box cover 11 facing the frame 12.

[0115] The box cover 11 of the battery box 10 of the battery 100 provided in the embodiment of the present application can be connected to the frame 200, and the battery cell group 20 of the battery 100 is connected to the box cover 11. In this way, at least part of the load of the battery cell group 20 can be directly transferred to the frame 200 through the box cover 11. In other words, at least part of the load of the battery cell group 20 can be borne by the frame 200 to reduce the load borne by the frame 12 of the battery box 10. This can reduce the strength requirements of the frame 12 and reduce the size of the frame 12, such as reducing the height of the frame 12, thereby effectively reducing the weight of the battery 100 and improving the mass energy density of the battery 100, thereby effectively improving the endurance performance of the electric device.

[0116] In some embodiments of the present application, please refer to Figures 4, 5 and 9. The box cover 11 has a first cavity 111, and the frame 12 has a second cavity 121. The first cavity 111 and the second cavity 121 are interconnected to form a receiving cavity 13, and at least a portion of the battery cell group 20 is accommodated in the first cavity 111.

[0117] In other words, in this embodiment, the cover 11 has a hollow structure. In the height direction of the battery 100, at least a portion of the battery cell group 20 can be accommodated in the first cavity 111. In some embodiments, a portion of the battery cell group 20 can be accommodated in the first cavity 111, and another portion of the battery cell group 20 can be accommodated in the second cavity 121. Of course, in other embodiments, in the height direction of the battery 100, the battery cell group 20 can be entirely accommodated in the first cavity 111, and the second cavity 121 can be used to accommodate other functional components of the battery 100, such as a battery management module, a sampling line, a cooling mechanism, etc.

[0118] In some embodiments, the box cover 11 includes an upper wall 112 and a side wall 113. The upper wall 112 is the portion of the box cover 11 used to seal the opening at one end of the above-mentioned cavity 13. The number of side walls 113 can be multiple, and multiple side walls 113 are connected to the periphery of the upper wall 112 and enclosed with the upper wall 112 to form the above-mentioned first cavity 111.

[0119] By adopting the above technical solution, at least part of the battery cell group 20 can be placed in the first cavity 111, effectively reducing the depth requirement of the second cavity 121. In this way, the depth of the second cavity 121 can be reduced by reducing the height of the frame 12, thereby further reducing the weight of the battery 100, further improving the mass energy density of the battery 100, and further improving the endurance performance of the electric device.

[0120] In some embodiments of the present application, referring to both FIG. 3 and FIG. 9 , the minimum depth H2 of the second cavity 121 is smaller than the maximum depth H1 of the first cavity 111 .

[0121] In some other embodiments of the present application, referring to both FIG. 3 and FIG. 9 , the maximum depth H3 of the second cavity 121 is smaller than the maximum depth H1 of the first cavity 111 .

[0122] The maximum depth H1 of the first cavity 111 refers to the maximum dimension of the first cavity 111 along the height direction of the battery 100. Similarly, the minimum depth H2 of the second cavity 121 refers to the minimum dimension of the second cavity 121 along the height direction of the battery 100. The maximum depth H3 of the second cavity 121 refers to the maximum dimension of the second cavity 121 along the height direction of the battery 100.

[0123] The multiple side walls 113 may have the same or different heights. In some embodiments, as shown in Figures 4 and 5, the maximum height of the two side walls 113 opposite to each other along the width direction of the battery 100 is greater than the maximum height of the two side walls 113 opposite to each other along the length direction of the battery 100. At this time, the side wall 113 with the larger maximum height corresponds to the position of the maximum depth H1 of the first cavity 111.

[0124] Different parts of the frame 12 may have the same or different heights. In some embodiments, as shown in Figure 3, the frame 12 includes a first support beam 122 and a second support beam 123. The maximum height of the first support beam 122 is less than the maximum height of the second support beam 123. At this time, the first support beam 122 with a smaller maximum height corresponds to the position of the minimum depth H2 of the second cavity 121, and the second support beam 123 with a larger maximum height corresponds to the position of the maximum depth H3 of the second cavity 121.

[0125] By adopting the above-mentioned technical solution, compared with the traditional solution in which the maximum depth of the second cavity is greater than the maximum depth of the first cavity, the embodiment of the present application can accommodate more volume of the battery cell group 20 in the first cavity 111, further reducing the depth requirement for the second cavity 121, and further reducing the height dimension of the frame 12, thereby further reducing the weight of the frame 12 and the total weight of the battery 100, further improving the mass energy density of the battery 100, and further improving the endurance performance of the electric device.

[0126] In some embodiments of the present application, please refer to Figures 3, 9 and 10. The frame 12 includes a first support beam 122, and the first support beam 122 includes a support beam body 1221 and an energy-absorbing beam body 1222. The energy-absorbing beam body 1222 is connected to the side of the support beam body 1221 facing away from the cavity 13.

[0127] The first support beam 122 is a supporting component of the frame 12. In some embodiments, the dimension of the first support beam 122 along the width direction of the battery 100 is smaller than the dimension of the first support beam 122 along the length direction of the battery 100. That is, the first support beam 122 extends along the length direction of the battery 100. For example, the first support beam 122 extends straight along the length direction of the battery 100. For another example, the first support beam 122 extends in a bent manner along the length direction of the battery 100. There can be two first support beams 122, and the two first support beams 122 are spaced apart along the width direction of the battery 100. In other embodiments, the dimension of the first support beam 122 along the length direction of the battery 100 is smaller than the dimension of the first support beam 122 along the width direction of the battery 100, that is, the first support beam 122 extends along the width direction of the battery 100. For example, the first support beam 122 extends in a straight line along the width direction of the battery 100. For example, the first support beam 122 extends in a bent manner along the width direction of the battery 100. The number of the first support beams 122 can be two, and the two first support beams 122 are arranged at intervals along the length direction of the battery 100.

[0128] The support beam 1221 is the primary supporting component of the first support beam 122, and the energy-absorbing beam 1222 is used to absorb external impact energy exerted on the first support beam 122. In some embodiments, the energy-absorbing beam 1222 may be a strip-shaped structure extending along the length of the support beam 1221. In other embodiments, the energy-absorbing beam 1222 may include multiple energy-absorbing portions (not shown) spaced apart along the length of the support beam 1221. In some embodiments, the support beam 1221 and the energy-absorbing beam 1222 may be integrally formed components, for example, the support beam 1221 and the energy-absorbing beam 1222 may be integrally formed using a die-casting process. In other embodiments, the support beam 1221 and the energy-absorbing beam 1222 may be separate components, for example, the support beam 1221 and the energy-absorbing beam 1222 may be separately formed and then connected to each other. The connection between the support beam 1221 and the energy-absorbing beam 1222 may be, but is not limited to, welding, fastening, or the like. In the case where the supporting beam 1221 and the energy absorbing beam 1222 are separate components, the material of the supporting beam 1221 and the material of the energy absorbing beam 1222 can be the same, for example, the material of the supporting beam 1221 and the material of the energy absorbing beam 1222 are aluminum alloy. The material of the supporting beam 1221 and the material of the energy absorbing beam 1222 can also be different, for example, the material of the supporting beam 1221 is aluminum alloy, and the material of the energy absorbing beam 1222 is stainless steel.

[0129] In some embodiments, the frame 12 may further include a second support beam 123 connected between the two first support beams 122. The second support beam 123 is another supporting component of the frame 12. The material of the second support beam 123 may be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. When the first support beam 122 extends along the length of the battery 100, the dimension of the second support beam 123 along the length of the battery 100 is smaller than the dimension of the second support beam 123 along the width of the battery 100. That is, the second support beam 123 extends along the width of the battery 100. For example, the second support beam 123 extends straight along the width of the battery 100, or, for example, the second support beam 123 extends in a curved manner along the width of the battery 100. The number of second support beams 123 may be two, and the two second support beams 123 are spaced apart along the length of the battery 100. When the first support beam 122 extends along the width direction of the battery 100, the dimension of the second support beam 123 along the width direction of the battery 100 is smaller than the dimension of the second support beam 123 along the length direction of the battery 100, that is, the second support beam 123 extends along the length direction of the battery 100. For example, the second support beam 123 extends straight along the length direction of the battery 100, or for another example, the second support beam 123 extends in a curved manner along the length direction of the battery 100. The number of second support beams 123 can be two, and the two second support beams 123 are spaced apart along the width direction of the battery 100. The two first support beams 122 and the two second support beams 123 enclose the second cavity 121. The second support beam 123 can be provided with an electrical interface for connecting to a high-voltage box, a pipe interface for connecting to a thermal management component, etc.

[0130] By adopting the above technical solution, when the outer side of the battery 100 is impacted by external force, the energy-absorbing beam 1222 can effectively absorb the impact energy, thereby effectively improving the situation where the impact energy is transmitted to the battery cell group 20 through the frame 12, and effectively reducing the risk of damage to the battery cell group 20.

[0131] In some embodiments of the present application, referring to FIG. 10 , the energy absorbing beam 1222 includes a main beam 12221 . The main beam 12221 is connected to a side of the supporting beam 1221 facing away from the cavity 13 and has a first energy absorbing cavity 12223 .

[0132] Main beam 12221 is the main portion of energy-absorbing beam 1222. Main beam 12221 is hollow, and the cavity of main beam 12221 constitutes the aforementioned first energy-absorbing cavity 12223. First energy-absorbing cavity 12223 is used to provide a collapse space for main beam 12221. When energy-absorbing beam 1222 is impacted by an external force, main beam 12221 can collapse and deform inward, thereby effectively absorbing the impact energy. The cross-sectional shape of main beam 12221 can be, but is not limited to, square, circular, triangular, or the like.

[0133] By adopting the above technical solution, when the outer side of the battery 100 is impacted by external force, the main beam 12221 can collapse and deform inward, thereby effectively absorbing the impact energy.

[0134] In some embodiments of the present application, referring to FIG. 10 , the energy absorbing beam 1222 further includes a first energy absorbing body 12222 , and the first energy absorbing body 12222 is disposed in the first energy absorbing cavity 12223 .

[0135] First energy absorber 12222 supports main beam 12221 and provides secondary energy absorption. Specifically, when energy absorber 1222 is impacted by an external force, and main beam 12221 absorbs the impact energy and collapses, main beam 12221 compresses first energy absorber 12222, causing it to collapse and deform, thereby achieving secondary energy absorption. First energy absorber 12222 may be, but is not limited to, energy absorbing ribs, energy absorbing adhesive, or the like.

[0136] By adopting the above technical solution, when the outer side of the battery 100 is impacted by external force, the impact energy can be transmitted to the first energy-absorbing body 12222 through the main beam 12221, causing the main beam 12221 and the first energy-absorbing body 12222 to deform in turn, so that the energy-absorbing beam 1222 can absorb the impact energy more effectively, further reducing the risk of damage to the battery cell group 20.

[0137] In some embodiments of the present application, referring to FIG. 10 , the first energy absorbing body 12222 is an energy absorbing rib and extends along the length direction of the main beam 12221 . The first energy absorbing body 12222 is connected between two opposite walls of the main beam 12221 .

[0138] In some embodiments, when the first support beam 122 extends along the length of the battery 100, the support beam body 1221 and the energy absorbing beam body 1222 also extend along the length of the battery 100, that is, the main beam body 12221 and the first energy absorbing body 12222 also extend along the length of the battery 100. The first energy absorbing body 12222 can be connected between two opposing walls of the main beam body 12221 along the width direction of the battery 100, and the first energy absorbing body 12222 can also be connected between two opposing walls of the main beam body 12221 along the height direction of the battery 100.

[0139] In other embodiments, when the first support beam 122 extends along the width direction of the battery 100, the support beam body 1221 and the energy absorbing beam body 1222 also extend along the width direction of the battery 100, that is, the main beam body 12221 and the first energy absorbing body 12222 also extend along the width direction of the battery 100. The first energy absorbing body 12222 can be connected between two opposing walls of the main beam body 12221 along the length direction of the battery 100, or the first energy absorbing body 12222 can be connected between two opposing walls of the main beam body 12221 along the height direction of the battery 100.

[0140] It should be noted that the number of the first energy absorbing body 12222 can be one or more, and the specific number can be determined according to actual application requirements.

[0141] By adopting the above technical solution, the impact energy can be absorbed more effectively, thereby further reducing the risk of damage to the battery cell group 20.

[0142] In some embodiments of the present application, referring to FIG. 3 , the first support beam 122 extends along the length direction of the battery 100 and is located on one side of the battery 100 along the width direction.

[0143] It can be understood that the first support beam 122 can extend in a straight line along the length direction of the battery 100 , or can be bent and extended along the length direction of the battery 100 .

[0144] By adopting the above technical solution, when one side of the battery 100 along the width direction is impacted by an external force, the energy-absorbing beam 1222 can effectively absorb the impact energy, thereby reducing the risk of damage to the battery cell group 20.

[0145] In some embodiments of the present application, please refer to FIG. 3 and FIG. 6 to FIG. 9 . The battery box 10 further includes a protective plate 14 covering the side of the frame 12 facing away from the box cover 11 . The protective plate 14 has a second energy absorbing cavity 141 .

[0146] The guard plate 14 is a protective component of the battery box 10. The guard plate 14 is located on the side of the frame 12 facing away from the box cover 11 to block the opening of the above-mentioned cavity 13 away from the box cover 11 and protect the battery cell group 20. The material of the guard plate 14 can be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. It can be understood that the guard plate 14 is connected to the frame 12, and the connection method between the guard plate 14 and the frame 12 can be, but is not limited to, welding, fastening connection, bonding, etc. The guard plate 14 has a hollow structure, and the cavity of the guard plate 14 constitutes the above-mentioned second energy absorption cavity 141. The second energy absorption cavity 141 is used to provide a collapse space for the guard plate 14. When the guard plate 14 is impacted by external force, the guard plate 14 can collapse and deform inward, thereby effectively absorbing the impact energy. In some embodiments, the guard plate 14 can be an integrally molded component, that is, the guard plate 14 is made using an integral molding process, and the integral molding process can be, but is not limited to, a die-casting process, a casting process, etc. In other embodiments, the guard plate 14 may also be a split connecting component. For example, the guard plate 14 includes multiple parts, which are connected to each other after being formed separately. The connection method between the multiple parts may be but is not limited to welding, bonding, etc., and the materials of the various parts may be the same or different.

[0147] By adopting the above technical solution, when the bottom of the battery 100 is impacted by external force, the protective plate 14 can collapse and deform inward to absorb the impact energy, thereby effectively improving the transmission of the impact energy to the battery cell group 20 and effectively reducing the risk of damage to the battery cell group 20.

[0148] In some embodiments of the present application, please refer to Figures 6 to 8. The protective plate 14 includes a first plate body 142, a second plate body 143 and a second energy absorbing body 144. The first plate body 142 and the second plate body 143 are spaced apart along the height direction of the battery 100 to form a second energy absorbing cavity 141. The second energy absorbing body 144 is arranged in the second energy absorbing cavity 141.

[0149] The first plate 142 and the second plate 143 together constitute the main body of the protective plate 14. The first plate 142 and the second plate 143 are spaced apart along the height direction of the battery 100 to form a second energy absorption cavity 141. It can be understood that the first plate 142 and the second plate 143 are parallel to each other, and the plate surface of the first plate 142 and the plate surface of the second plate 143 are opposite and spaced apart. The first plate 142 can be arranged on the side of the second plate 143 facing away from the box cover 11, or the second plate 143 can be arranged on the side of the first plate 142 facing away from the box cover 11. The first plate 142 and the second plate 143 are connected together by necessary connecting structures.

[0150] The second energy absorbing body 144 performs a secondary energy absorption function. That is, when the main body composed of the first plate body 142 and the second plate body 143 is impacted by an external force, the main body squeezes the second energy absorbing body 144, causing the second energy absorbing body 144 to collapse and deform, thereby achieving the purpose of secondary energy absorption. The second energy absorbing body 144 can be, but is not limited to, energy absorbing ribs, energy absorbing glue, etc. The material of the first plate body 142, the material of the second plate body 143, and the material of the second energy absorbing body 144 can be the same. For example, the material of the first plate body 142, the material of the second plate body 143, and the material of the second energy absorbing body 144 are aluminum alloys. The material of the first plate body 142, the material of the second plate body 143, and the material of the second energy absorbing body 144 can be different. For example, the material of the first plate body 142 and the material of the second plate body 143 are aluminum alloys, and the material of the second energy absorbing body 144 is stainless steel.

[0151] By adopting the above technical solution, when the bottom of the battery 100 is impacted by external force, the impact energy can be transferred to the second energy absorber 144, causing the second energy absorber 144 to deform, so that the protective plate 14 can more effectively absorb the impact energy, further reducing the risk of damage to the battery cell group 20.

[0152] In some embodiments of the present application, please refer to FIG. 7 and FIG. 8 . The second energy absorbing body 144 is an energy absorbing rib. The second energy absorbing body 144 is connected between the first plate 142 and the second plate 143 .

[0153] The second energy absorber 144 can extend in any direction between the first plate 142 and the second plate 143. For example, the second energy absorber 144 can extend along the width of the battery 100. Another example is that the second energy absorber 144 can extend along the length of the battery 100. The number of second energy absorbers 144 can be one or more, depending on actual application requirements.

[0154] By adopting the above technical solution, the impact energy can be absorbed more effectively, thereby further reducing the risk of damage to the battery cell group 20.

[0155] In some embodiments of the present application, referring to FIG. 8 , the thickness direction of the second energy absorber 144 is inclined relative to the height direction of the battery 100 .

[0156] In this embodiment, the second energy absorbing body 144 has a strip plate structure. The thickness direction of the second energy absorbing body 144 refers to the direction perpendicular to the plate surface of the second energy absorbing body 144. The thickness direction of the second energy absorbing body 144 is relatively inclined with respect to the height direction of the battery 100. In other words, the thickness direction of the second energy absorbing body 144 is neither perpendicular nor parallel to the height direction of the battery 100. The angle formed by the thickness direction of the second energy absorbing body 144 and the height direction of the battery 100 can be determined according to actual application requirements. For example, the angle α formed by the thickness direction of the second energy absorbing body 144 and the height direction of the battery 100 can be 45°, 60°, 75°, etc.

[0157] By adopting the above technical solution, the second energy-absorbing body 144 can be quickly collapsed and deformed when subjected to external force impact, thereby more effectively absorbing the impact energy and further reducing the risk of damage to the battery cell group 20.

[0158] In some embodiments of the present application, referring to FIG. 8 , there are multiple second energy absorbers 144 , and the multiple second energy absorbers 144 are arranged at intervals along a direction perpendicular to the length direction of the second energy absorbers 144 , and the thickness directions of two adjacent second energy absorbers 144 are inclined in different directions relative to the height direction of the battery 100 .

[0159] The plurality of second energy absorbers 144 being arranged in parallel in a direction perpendicular to the length direction of the second energy absorbers 144 means that the length directions of the plurality of second energy absorbers 144 are mutually parallel and arranged side by side in a direction perpendicular to the length direction of the second energy absorbers 144. Adjacent second energy absorbers 144 may be spaced apart or abut against each other. The thickness directions of two adjacent second energy absorbers 144 being inclined in different directions relative to the height direction of the battery 100 means that the thickness directions of the two adjacent second energy absorbers 144 are not parallel to each other.

[0160] In some embodiments, the thickness directions of two adjacent second energy absorbers 144 are inclined in opposite directions relative to the height direction of the battery 100, that is, among two adjacent second energy absorbers 144, the angle formed by the thickness direction of one second energy absorber 144 and the height direction of the battery 100 is equal to the angle formed by the thickness direction of the other second energy absorber 144 and the height direction of the battery 100, and the thickness directions of the two second energy absorbers 144 are not parallel to each other. In other words, any plane parallel to the length direction of the second energy absorber 144 and the height direction of the battery 100 is defined as a bisector plane, and the angle formed by the thickness directions of two adjacent second energy absorbers 144 is bisected by the above bisector plane.

[0161] The present embodiment will be further described below by taking the example that the first plate 142 is disposed on the side of the second plate 143 facing away from the box cover 11 .

[0162] Referring to FIG. 8 , when the first plate 142 is impacted by an external force, the impact force F is transmitted through the first plate 142 to the second energy absorbing body 144 and forms a thrust F1 acting on the second energy absorbing body 144 . The thrust F1 is directed from the first plate 142 along the second energy absorbing body 144 toward the second plate 143 . Decomposing the thrust F1 yields a first force component F2 parallel to the height direction of the battery 100 and a second force component F3 parallel to the length direction of the battery 100 . Since the thickness directions of two adjacent second energy absorbing bodies 144 are inclined in opposite directions relative to the height direction of the battery 100 , the second force components F3 acting on the two adjacent second energy absorbing bodies 144 are in opposite directions, thereby causing the second force components F3 acting on the two adjacent second energy absorbing bodies 144 to cancel each other out. That is, at least part of the impact force acting on the two adjacent second energy absorbing bodies 144 cancels each other out.

[0163] By adopting the above technical solution, when the guard plate 14 is impacted by external force, at least part of the impact energy received by the two adjacent second energy-absorbing bodies 144 can offset each other, thereby effectively improving the impact bearing capacity of the guard plate 14 and further reducing the risk of damage to the battery cell group 20.

[0164] In some embodiments of the present application, the second energy absorber 144 extends along the width direction of the battery 100 .

[0165] In other words, the length direction of the second energy absorber 144 is parallel to the width direction of the battery 100. When the battery 100 is impacted by an external force on one side along the width direction, the impact energy can be transferred from one end of the second energy absorber 144 to the other end of the second energy absorber 144, effectively reducing the risk of bending of the second energy absorber 144.

[0166] By adopting the above technical solution, the impact resistance of the protective plate 14 in the width direction of the battery 100 is effectively improved. In this way, when the battery 100 is impacted by external force on one side along the width direction, the protective plate 14 can effectively withstand the impact energy, thereby effectively reducing the risk of damage to the battery cell group 20.

[0167] In some embodiments of the present application, referring to FIG. 8 , the second energy absorber 144 is an energy absorbing rib, the thickness direction of the second energy absorber 144 is relatively inclined to the height direction of the battery 100 , and the second energy absorber 144 extends along the width direction of the battery 100 .

[0168] By adopting the above-mentioned technical solution, the force-bearing area of ​​the second energy-absorbing body 144 along the width direction of the battery 100 is effectively increased, and the impact-bearing capacity of the protective plate 14 in the width direction of the battery 100 is effectively improved. In this way, when the battery 100 is impacted by external force on one side along the width direction, the protective plate 14 can effectively withstand the impact energy, thereby effectively reducing the risk of damage to the battery cell group 20.

[0169] In some embodiments of the present application, referring to FIG. 10 , in a direction perpendicular to the length direction of the first support beam 122 , at least a portion of the energy-absorbing beam body 1222 protrudes from the guard plate 14 .

[0170] It can be understood that when the first support beam 122 extends along the length direction of the battery 100 , at least a portion of the energy-absorbing beam body 1222 protrudes from the guard plate 14 in the width direction of the battery 100 .

[0171] In some embodiments, in the height direction of the battery 100, the energy-absorbing beam 1222 protrudes in a direction away from the box cover 11 and is on the side of the support beam 1221 facing away from the box cover 11, so that the first support beam 122 is roughly in a stepped structure. The guard plate 14 can be connected to the stepped space defined by the part of the energy-absorbing beam 1222 protruding from the support beam 1221 and the support beam 1221. The guard plate 14 can be connected to the support beam 1221, for example, the guard plate 14 can be connected to the side of the support beam 1221 facing away from the box cover 11. The guard plate 14 can also be connected to the energy-absorbing beam 1222, for example, the guard plate 14 can be connected to the side of the energy-absorbing beam 1222 facing the cavity 13.

[0172] In other embodiments, in the height direction of the battery 100, the side of the energy-absorbing beam 1222 facing away from the box cover 11 can be flush with the side of the supporting beam 1221 facing away from the box cover 11, or, the side of the supporting beam 1221 facing away from the box cover 11 protrudes out from the side of the energy-absorbing beam 1222 facing away from the box cover 11, and the guard plate 14 is connected to the support beam 1221, and the guard plate 14 and the energy-absorbing beam 1222 do not overlap with each other in the height direction of the battery 100.

[0173] Of course, in other embodiments, the guard plate 14 may also partially overlap with the energy-absorbing beam 1222 in the height direction of the battery 100 , but in the direction perpendicular to the length direction of the first support beam 122 , at least part of the energy-absorbing beam 1222 protrudes from the guard plate 14 .

[0174] By adopting the above technical solution, when the battery 100 is impacted by external force, the energy-absorbing beam 1222 can first absorb the impact energy, thereby effectively reducing the risk of the impact energy being transmitted to the guard plate 14.

[0175] In some embodiments of the present application, the battery cell group 20 is connected to the protective plate 14 .

[0176] In some embodiments, in the case of a battery cell group 20 composed of multiple battery cells 21 directly connected in series, parallel or mixed, the shell 211 is directly connected to the box cover 11 and the protective plate 14, and the electrode terminals 213 are arranged on other parts of the shell 211 except for the parts used to connect the box cover 11 and the protective plate 14. For example, the electrode terminals 213 are arranged on one side or two opposite sides of the shell 211 along the width direction of the battery 100. In this case, the battery cell 21 can be a blade-shaped battery cell; for another example, the electrode terminals 213 are arranged on one side or two opposite sides of the shell 211 along the length direction of the battery 100. In this case, the battery cell 21 can be a blade-shaped battery cell.

[0177] In other embodiments, when multiple battery cells 21 are first connected in series or in parallel or in a mixed manner to form a battery module and the multiple battery modules are further connected in series or in parallel or in a mixed manner to form a battery cell group 20, the outer shell is directly connected to the box cover 11 and the protective plate 14, and the electrical leads are arranged on other parts of the outer shell except for the parts used to connect the box cover 11 and the protective plate 14. For example, the electrical leads are arranged on one side or two opposite sides of the outer shell along the width direction of the battery 100. For another example, the electrical leads are arranged on one side or two opposite sides of the outer shell along the length direction of the battery 100.

[0178] It should be noted that the connection between the cell group 20 and the protective plate 14 may be, but is not limited to, bonding, fastening, etc. In some embodiments, the cell group 20 is bonded to the protective plate 14. This not only makes the force between the cell group 20 and the protective plate 14 more uniform, but also simplifies the assembly process of the cell group 20 and the protective plate 14, thereby effectively improving the assembly efficiency of the battery 100.

[0179] By adopting the above technical solution, the battery cell group 20 can be connected between the box cover 11 and the protective plate 14, thereby improving the shaking of the battery cell group 20 and effectively improving the reliability of the battery 100.

[0180] In some embodiments of the present application, please refer to FIG. 3 and FIG. 10 . The battery box 10 further includes a sealing member 15 . The sealing member 15 is disposed between the frame 12 and the protective plate 14 .

[0181] The seal 15 is used to seal the gap between the frame 12 and the protective plate 14. The seal 15 is made of a sealing material, which may include, but is not limited to, rubber, silicone, or adhesive. The seal 15 may be an annular structure, disposed around the cavity 13 to reduce the risk of communication between the cavity 13 and the external environment of the battery 100 through the gap between the frame 12 and the protective plate 14.

[0182] By adopting the above technical solution, the sealing performance of the battery 100 is effectively improved, thereby effectively improving the safety of the battery 100.

[0183] In some embodiments of the present application, referring to FIG. 11 , the battery 100 further includes a first thermal management component 30 . The first thermal management component 30 is disposed between the battery cell group 20 and the protective plate 14 and is attached to the battery cell group 20 .

[0184] The first thermal management component 30 is a component for exchanging heat for the battery cell group 20. The heat exchange may be cooling or heating the battery cell group 20. The first thermal management component 30 may be, but is not limited to, a liquid cooling component, an air cooling component, a metal heat conducting component, and the like.

[0185] In some embodiments, the first thermal management component 30 is a liquid cooling plate. One surface of the first thermal management component 30 is attached to the battery cell assembly 20, and the other surface of the first thermal management component 30 can be attached to the protective plate 14 or spaced apart from the protective plate 14. In some embodiments, the first thermal management component 30 can also be integrally formed on the protective plate 14. The battery 100 can also include a first liquid inlet pipe and a first liquid outlet pipe. The first liquid inlet pipe is connected to the liquid inlet of the first thermal management component 30, and the first liquid outlet pipe is connected to the liquid outlet of the first thermal management component 30. Coolant flows along the first liquid inlet pipe through the liquid inlet of the first thermal management component 30 into the cooling channel of the first thermal management component 30, and then is discharged from the liquid outlet of the first thermal management component 30 along the first liquid outlet pipe. This allows the coolant to circulate within the first thermal management component 30, thereby effectively exchanging heat with the battery cell assembly 20.

[0186] In some embodiments, in the case of a battery cell group 20 in which multiple battery cells 21 are directly connected in series, parallel, or mixed, the shell 211 is directly connected to the box cover 11, and the electrode terminals 213 are arranged on other parts of the shell 211 except for the part used to connect to the box cover 11 and the part facing the first thermal management component 30. For example, the electrode terminals 213 are arranged on one side or two opposite sides of the shell 211 along the width direction of the battery 100. In this case, the battery cell 21 can be a blade-shaped battery cell; for another example, the electrode terminals 213 are arranged on one side or two opposite sides of the shell 211 along the length direction of the battery 100. In this case, the battery cell 21 can be a blade-shaped battery cell.

[0187] In other embodiments, when multiple battery cells 21 are first connected in series or in parallel or in a mixed manner to form a battery module and the multiple battery modules are further connected in series or in parallel or in a mixed manner to form a battery cell group 20, the outer shell is directly connected to the box cover 11, and the electrical leads are arranged on other parts of the outer shell except for the part used to connect to the box cover 11 and the part facing the first thermal management component 30. For example, the electrical leads are arranged on one side or two opposite sides of the outer shell along the width direction of the battery 100. For another example, the electrical leads are arranged on one side or two opposite sides of the outer shell along the length direction of the battery 100.

[0188] By adopting the above technical solution, the heat exchange performance of the battery 100 is effectively improved, thereby effectively improving the safety of the battery 100.

[0189] In some embodiments of the present application, the frame 12 is used to connect to the vehicle frame 200 .

[0190] When the battery 100 is assembled on the vehicle frame 200, the box cover 11 and the frame 12 are connected to the vehicle frame 200. In this case, part of the load of the box cover 11 and part of the load of the battery cell group 20 can be transferred to the vehicle frame 200 through the frame 12 to reduce the connection stress between the frame 12 and the box cover 11.

[0191] The connection between the frame 12 and the vehicle frame 200 may be, but is not limited to, fastening, welding, or hooking. In some embodiments, the frame 12 is provided with a connection hole, and the battery case 10 further includes a fastener that passes through the connection hole and connects to the vehicle frame 200. The fastener may be, but is not limited to, a bolt, a screw, a rivet, or the like. The battery case 10 may further include a connecting sleeve 18 disposed within and coaxially with the connection hole. The fastener passes through the connecting sleeve 18 and connects to the vehicle frame 200.

[0192] By adopting the above technical solution, the connection stress between the frame 12 and the box cover 11 is effectively reduced, thereby effectively reducing the risk of fracture at the connection portion between the frame 12 and the box cover 11.

[0193] In some embodiments of the present application, please refer to Figures 3, 4 and 5. The battery box 10 also includes a mounting assembly 16. The battery cell group 20 is connected to the box cover 11. The box cover 11 is connected to the mounting assembly 16. The mounting assembly 16 is used to connect to the frame 200.

[0194] The mounting assembly 16 is used to connect the tank cover 11 to the vehicle frame 200. The mounting assembly 16 can be, but is not limited to, a fastening assembly, a hooking assembly, a clamping assembly, etc. The mounting assembly 16 can be located on the surface of the tank cover 11 facing away from the battery pack 20, or it can be located on the side of the tank cover 11.

[0195] By adopting the above technical solution, it is convenient to connect the box cover 11 to the vehicle frame 200.

[0196] In some embodiments of the present application, please refer to Figures 4 and 5 together. At least part of the mounting assembly 16 includes a support member 161 and a first connecting member 162. The support member 161 is connected to the box cover 11, and the first connecting member 162 is connected to the support member 161 and is used to connect to the frame 200.

[0197] It can be understood that the number of mounting components 16 can be multiple, a part of the mounting components 16 can be connected to the middle part of the box cover 11, and a part of the mounting components 16 can be connected to the outer peripheral side of the box cover 11, wherein the part of the mounting components 16 connected to the middle part of the box cover 11 can include a support member 161 and a first connecting member 162.

[0198] Support member 161 is a supporting component for mounting assembly 16. Support member 161 may be, but is not limited to, a support plate or a support beam. Material of support member 161 may be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. The connection between support member 161 and cover 11 may be, but is not limited to, welding, fastening, or bonding. There may be one or more support members 161.

[0199] The first connector 162 is a component used to connect the vehicle frame 200. The first connector 162 may be, but is not limited to, a bolt, a screw, a rivet, a hook, or the like. The connection between the first connector 162 and the support member 161 may be, but is not limited to, welding, fastening, or the like. In some embodiments, each support member 161 is provided with one first connector 162. In other embodiments, each support member 161 may be provided with multiple first connectors 162.

[0200] By adopting the above technical solution, it is convenient to connect the box cover 11 to the vehicle frame 200.

[0201] In some embodiments of the present application, please refer to Figures 4 and 5 together. The battery cell group 20 is connected to the lower part of the upper wall 112, the support member 161 is connected to the upper wall 112, and the first connecting member 162 connects the support member 161 and the upper wall 112 to the frame 200.

[0202] It can be understood that when the box cover 11 is connected to the vehicle frame 200 , the upper portion of the upper wall 112 is arranged opposite to the vehicle frame 200 , and the lower portion of the upper wall 112 is arranged opposite to the guard plate 14 .

[0203] By adopting the above technical solution, the strength of the upper wall 112 of the box cover 11 is effectively improved, thereby effectively improving the bearing capacity of the upper wall 112 of the box cover 11 on the battery cell group 20.

[0204] In some embodiments of the present application, referring to both FIG. 4 and FIG. 5 , the support member 161 is connected to the upper portion of the upper wall 112 and extends along the width direction of the battery 100 .

[0205] In this embodiment, the support member 161 is a long strip structure. For example, the support member 161 can be a strip support plate, a support beam, etc. The length direction of the support member 161 is parallel to the width direction of the battery 100. When the battery 100 is impacted by an external force on one side along the width direction, the impact energy can be transmitted from one end of the support member 161 to the other end of the support member 161, effectively reducing the risk of bending of the support member 161.

[0206] By adopting the above technical solution, the impact resistance of the upper wall 112 of the box cover 11 in the width direction of the battery 100 is effectively improved, and the risk of deformation of the box cover 11 when the battery 100 is impacted by external force on one side along the width direction is effectively reduced, thereby effectively reducing the risk of damage to the battery cell pack 20.

[0207] In some embodiments of the present application, please refer to FIG. 4 and FIG. 5 . The battery box 10 further includes a restraining structure 17 disposed on the box cover 11 . The restraining structure 17 is used to restrain the expansion of the battery cell group 20 .

[0208] The restraining structure 17 is a component used to restrain the expansion of the cell group 20. It is understood that when the cell group 20 expands, the expansion force generated by the cell group 20 acts on the restraining structure 17. Subsequently, the restraining structure 17 can apply a reaction force to the cell group 20, which resists the expansion force of the cell group 20, thereby restraining the expansion of the cell group 20. The restraining structure 17 can be, but is not limited to, a clamping structure, a push-pushing structure, etc.

[0209] By adopting the above technical solution, under the restraining action of the restraining structure 17 , the expansion force of the battery cell group 20 can be resisted, thereby limiting the expansion and deformation of the battery cell group 20 and effectively improving the safety performance of the battery 100 .

[0210] In some embodiments of the present application, please refer to FIG. 4 and FIG. 5 . The restraint structure 17 includes two beam structures 171 spaced apart from each other. The two beam structures 171 cooperate to clamp the battery cell group 20 .

[0211] In some embodiments, the two beam structures 171 are parallel to each other and spaced apart from each other, with the cell group 20 positioned between the two beam structures 171. This allows the two beam structures 171 to cooperate with each other to clamp the cell group 20, thereby resisting the expansion force of the cell group 20. The beam structures 171 can be made of, but are not limited to, aluminum, aluminum alloys, iron, stainless steel, copper, etc. It is understood that the beam structures 171 can extend along the width of the battery 100, in which case the two beam structures 171 are spaced apart from each other along the length of the battery 100. The beam structures 171 can also extend along the length of the battery 100, in which case the two beam structures 171 are spaced apart from each other along the width of the battery 100. In some embodiments, the beam structures 171 can be connected to the box cover 11. The connection between the beam structures 171 and the box cover 11 can be, but are not limited to, welding, fastening, or bonding. If the box cover 11 has the first cavity 111 described above, the beam structures 171 can be disposed within the first cavity 111.

[0212] By adopting the above technical solution, under the clamping action of the two beam structures 171 , the expansion force of the battery cell group 20 can be resisted, thereby limiting the expansion and deformation of the battery cell group 20 and effectively improving the safety performance of the battery 100 .

[0213] In some embodiments of the present application, referring to FIG. 4 and FIG. 5 , the beam structure 171 extends along the width direction of the battery 100 , and the beam structure 171 is connected to at least one of the upper wall 112 and the side wall 113 .

[0214] The beam structure 171 extends along the width direction of the battery 100 . In other words, the length direction of the beam structure 171 is parallel to the width direction of the battery 100 . Two beam structures 171 may be arranged relatively spaced apart along the length direction of the battery 100 .

[0215] In some embodiments, the beam structure 171 is connected to the upper wall 112 , and the connection between the beam structure 171 and the upper wall 112 may be, but is not limited to, welding, bonding, fastening, etc.

[0216] In other embodiments, the beam structure 171 is connected to the side wall 113, and one end of the beam structure 171 is connected to one side wall 113 and the other end of the beam structure 171 is connected to the other side wall 113. The connection method between the beam structure 171 and the side wall 113 can be but is not limited to welding, bonding, fastening connection, etc.

[0217] In some other embodiments, the beam structure 171 is connected to the upper wall 112 , and the beam structure 171 is also connected to the side wall 113 .

[0218] By adopting the above technical solution, the installation operation of the beam structure 171 is facilitated, so that the two beam structures 171 can more effectively clamp the battery cell group 20, and the impact resistance of the box cover 11 along the width direction of the battery 100 can be improved, so that the box cover 11 can effectively withstand the impact force when the battery 100 is impacted by an external force on one side along the width direction, effectively reducing the risk of deformation of the box cover 11, thereby effectively reducing the risk of damage to the battery cell group 20.

[0219] In some embodiments of the present application, please refer to Figures 4 and 5 together. The beam structure 171 includes a transition piece 1711 and a beam body 1712. The transition piece 1711 includes a matching portion 17111 and an installation portion 17112 that are connected to each other. The matching portion 17111 is shaped to match at least a portion of the inner wall surface of the side wall 113 and are connected to each other. The beam body 1712 is connected to the installation portion 17112.

[0220] The adapter 1711 is a component used to connect the box cover 11 and the beam body 1712 , wherein the matching portion 17111 is a portion connected to the side wall 113 of the box cover 11 , and the mounting portion 17112 is a portion connected to the beam body 1712 . The matching of the shape of the matching portion 17111 with at least part of the inner wall of the side wall 113 means that the shape of the side of the matching portion 17111 facing the side wall 113 is consistent with the shape of at least part of the inner wall of the side wall 113. In other words, when part of the inner wall of the side wall 113 has a surface structure of different shapes such as a convex surface, a curved surface, a corner surface, etc., the side of the matching portion 17111 facing the side wall 113 also has a corresponding surface structure, and the shape of the surface structure of the side of the matching portion 17111 facing the side wall 113 is the same as the shape of the surface structure of the part of the inner wall of the side wall 113, and the surface structure of the side of the matching portion 17111 facing the side wall 113 can be matched in a concave-convex manner with the surface structure of the part of the inner wall of the side wall 113, so that the matching portion 17111 can be fit and connected with the part of the inner wall of the side wall 113. In some embodiments, adapter 1711 may be an integrally formed component. In other words, matching portion 17111 and mounting portion 17112 are integrally formed. For example, adapter 1711 is a stamped component, meaning matching portion 17111 and mounting portion 17112 are integrally formed using a stamping process. In another example, adapter 1711 is a cast component, meaning matching portion 17111 and mounting portion 17112 are integrally formed using a casting process. If adapter 1711 is an integrally formed component, the material of matching portion 17111 and mounting portion 17112 are the same. In other words, adapter 1711 is made of a single material, which may include, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, and the like. In other embodiments, the adapter 1711 can be a split connecting component. In other words, the matching portion 17111 and the mounting portion 17112 are separately formed and then connected to each other. For example, the matching portion 17111 and the mounting portion 17112 are respectively formed by a stamping process and then connected to each other. For another example, the matching portion 17111 and the mounting portion 17112 are respectively formed by a casting process and then connected to each other. The connection method between the matching portion 17111 and the mounting portion 17112 can be but is not limited to welding, bonding, fastening connection, etc. In the case where the adapter 1711 is a separate connecting component, the material of the matching portion 17111 and the mounting portion 17112 can be the same. In other words, the adapter 1711 can be made of a single material, and the material of the adapter 17111 can be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. The material of the matching portion 17111 and the mounting portion 17112 can also be different. For example, the matching portion 17111 can be made of aluminum alloy, and the mounting portion 17112 can be made of stainless steel. The connection between the matching portion 17111 and the side wall 113 can be, but is not limited to, welding, bonding, fastening, etc.

[0221] The beam body 1712 is a supporting component of the battery box 10. The beam body 1712 can be used to support the box cover 11. For example, the beam body 1712 is used to support the upper wall 112 of the box cover 11. The beam body 1712 can also be used to abut against the battery cell group 20 to constrain the battery cell group 20. For example, the beam body 1712 is used as an expansion beam to resist the expansion force of the battery cell group 20. The beam body 1712 can be a profile part, that is, the beam body 1712 can be integrally formed using a linear extrusion process. The material of the beam body 1712 can be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. The beam body 1712 is connected to the mounting portion 17112, and the connection method between the beam body 1712 and the mounting portion 17112 can be, but is not limited to, welding, bonding, fastening connection, etc.

[0222] In the related art, in order to make the shape of the box cover 11 adapt to the actual application requirements, the box cover 11 is usually formed by a stamping process, so that the side wall 113 of the box cover 11 can have an irregular shape structure according to different application requirements, and the beam body 1712 is usually a profile part, that is, the beam body 1712 is formed by a linear extrusion process, so that the end shape of the beam body 1712 is difficult to match the shape of the side wall 113 of the box cover 11. In this way, the beam body 1712 can only be connected to the upper wall 112 of the box cover 11, but it is difficult to connect the two ends of the beam body 1712 to the side wall 113 of the box cover 11, resulting in a low connection strength between the beam body 1712 and the box cover 11, which makes the beam body 1712 easily deformed or displaced after being subjected to the expansion force of the battery cell group 20 or other external forces, which is not conducive to improving the reliability of the battery 100.

[0223] By adopting the above technical solution, since the matching portion 17111 can be interconnected with at least part of the inner wall surface of the side wall 113, and the beam body 1712 is installed on the installation portion 17112 of the adapter 1711, the beam body 1712 can be connected to the side wall 113 through the adapter 1711, thereby effectively improving the connection strength between the beam body 1712 and the box cover 11, thereby effectively reducing the risk of deformation or displacement of the beam body 1712, and effectively improving the reliability of the battery 100.

[0224] It is understandable that the material of the box cover 11, the material of the adapter 1711 and the material of the beam body 1712 may be the same or different.

[0225] In some embodiments, referring to Figures 4 and 5 , the material of the cover 11 and the adapter 1711 are the same, while the material of the beam 1712 is different from that of the cover 11. For example, the cover 11 and the adapter 1711 are made of steel, while the beam 1712 is made of aluminum. The adapter 1711 is welded to the cover 11. The beam structure 171 further includes a first fastener 1713, which connects the beam 1712 to the mounting portion 17112. The first fastener 1713 may be, but is not limited to, a bolt, a screw, a rivet, or the like.

[0226] In the related art, when the box cover 11 is formed by a stamping process, the thickness of the wall of the box cover 11 is relatively small. In order to improve the structural strength of the box cover 11, the box cover 11 is usually made of high-strength steel. Since the beam body 1712 needs to resist the expansion force of the battery cell group 20, the beam body 1712 is usually made of aluminum as a cavity structure. Since steel and aluminum are difficult to be effectively welded, it is difficult to effectively connect the beam body 1712 to the box cover 11, and the connection strength is poor.

[0227] By adopting the above technical solution, since the material of the box cover 11 is the same as that of the adapter 1711, the adapter 1711 is welded to the box cover 11, and the material of the beam body 1712 is different from that of the box cover 11, the beam body 1712 and the mounting portion 17112 are connected by the first fastener 1713, so that the beam body 1712 can be connected to the box cover 11 through the adapter 1711, which facilitates the assembly of the beam body 1712 and effectively improves the connection strength between the beam body 1712 and the box cover 11, thereby effectively reducing the risk of deformation or displacement of the beam body 1712 and effectively improving the reliability of the battery 100.

[0228] In other embodiments, referring to Figures 4 and 5 , the material of the box cover 11 and the adapter 1711 are the same, while the material of the beam body 1712 is different from that of the box cover 11. For example, the material of the box cover 11 and the adapter 1711 is steel, while the material of the beam body 1712 is aluminum. The box cover 11 and the adapter 1711 are stamped parts, i.e., the box cover 11 and the adapter 1711 are formed using a stamping process, while the beam body 1712 is a profile part, i.e., the beam body 1712 is formed using a linear extrusion process. The matching portion 17111 of the adapter 1711 is shaped to match and welded to at least a portion of the inner wall of the side wall 113 of the box cover 11. The beam structure 171 also includes a first fastener 1713, and the beam body 1712 is connected to the mounting portion 17112 via the first fastener 1713.

[0229] By adopting the above technical solution, since the material of the box cover 11 is the same as that of the adapter 1711, the matching portion 17111 of the adapter 1711 is matched with and welded to at least part of the inner wall shape of the side wall 113 of the box cover 11, and the material of the beam body 1712 is different from that of the box cover 11, the beam body 1712 and the mounting portion 17112 are connected by the first fastener 1713, so that the beam body 1712 can be connected to the side wall 113 of the box cover 11 through the adapter 1711, which facilitates the assembly of the beam body 1712, effectively improves the connection strength between the beam body 1712 and the box cover 11, thereby effectively reducing the risk of deformation or displacement of the beam body 1712, and effectively improving the reliability of the battery 100.

[0230] In yet other embodiments, the material of the box cover 11, the material of the adapter 1711, and the material of the beam 1712 are the same. For example, the material of the box cover 11, the material of the adapter 1711, and the material of the beam 1712 are aluminum. In another example, the material of the box cover 11, the material of the adapter 1711, and the material of the beam 1712 are steel. The box cover 11 and the adapter 1711 are stamped parts, that is, the box cover 11 and the adapter 1711 are formed using a stamping process, and the beam 1712 is a profile part, that is, the beam 1712 is formed using a linear extrusion process. The matching portion 17111 of the adapter 1711 is shaped to match and welded to at least a portion of the inner wall of the side wall 113 of the box cover 11, and the beam 1712 is welded to the mounting portion 17112.

[0231] By adopting the above technical solution, since the material of the box cover 11, the material of the adapter 1711 and the material of the beam body 1712 are the same, the matching part 17111 of the adapter 1711 is matched with the shape of at least part of the inner wall of the side wall 113 of the box cover 11 and welded, and the beam body 1712 is welded to the mounting part 17112, so that the beam body 1712 can be connected to the side wall 113 of the box cover 11 through the adapter 1711, which is convenient for assembling the beam body 1712, effectively improving the connection strength between the beam body 1712 and the box cover 11, thereby effectively reducing the risk of deformation or displacement of the beam body 1712, and effectively improving the reliability of the battery 100.

[0232] Of course, in other embodiments, adapter 1711 may not be provided, and beam 1712 may be directly connected to lid 11. For example, lid 11 and beam 1712 may be made of the same material, and beam 1712 and lid 11 may be directly welded. Alternatively, lid 11 and beam 1712 may be made of different materials, and beam 1712 and lid 11 may be connected via fasteners.

[0233] In some embodiments of the present application, referring to FIG4 , the adapter 1711 includes a first adapter 1711a and a second adapter 1711b . The matching portion 17111 of the first adapter 1711a is shaped to match at least a portion of the inner wall surface of one side wall 113 and are connected to each other. The matching portion 17111 of the second adapter 1711b is shaped to match at least a portion of the inner wall surface of the other side wall 113 and are connected to each other. One end of the beam body 1712 is connected to the mounting portion 17112 of the first adapter 1711a , and the other end of the beam body 1712 is connected to the mounting portion 17112 of the second adapter 1711b .

[0234] By adopting the above technical solution, the two ends of the beam body 1712 can be connected to the side wall 113 through the adapter 1711, further improving the connection strength between the beam body 1712 and the box cover 11, thereby further reducing the risk of deformation or displacement of the beam body 1712.

[0235] In other embodiments of the present application, please refer to Figure 5, the matching portion 17111 includes a first matching portion 17111a and a second matching portion 17111b, the first matching portion 17111a is shaped to match at least a portion of the inner wall surface of one side wall 113 and are connected to each other, the second matching portion 17111b is shaped to match at least a portion of the inner wall surface of the other side wall 113 and are connected to each other, one end of the mounting portion 17112 is connected to the first matching portion 17111a, and the other end of the mounting portion 17112 is connected to the second matching portion 17111b, and the beam body 1712 extends from the first matching portion 17111a toward the second matching portion 17111b and is connected to the mounting portion 17112.

[0236] By adopting the above technical solution, one end of the mounting portion 17112 can be connected to the side wall 113 through the first matching portion 17111a, and the other end of the mounting portion 17112 can be connected to the side wall 113 through the second matching portion 17111b, thereby effectively improving the connection strength between the mounting portion 17112 and the box cover 11. Since the beam body 1712 extends from the first matching portion 17111a toward the second matching portion 17111b, after the beam body 1712 is connected to the mounting portion 17112, the connection strength between the beam body 1712 and the box cover 11 can be improved, thereby further reducing the risk of deformation or displacement of the beam body 1712.

[0237] In some embodiments of the present application, please refer to FIG. 4 and FIG. 5 . The restraint structure 17 further includes a second connecting member 172 . The second connecting member 172 is connected between the two beam structures 171 .

[0238] The second connector 172 is a component used to connect two adjacent beam structures 171, and serves to limit the relative position of the two adjacent beam structures 171. For example, when the battery cell group 20 expands, the beam structure 171 is subjected to the expansion force of the battery cell group 20. At this time, the second connector 172 applies a pulling force to the beam structure 171 in the opposite direction of the expansion force of the battery cell group 20, thereby offsetting the expansion force of the battery cell group 20 and reducing the risk of deformation or displacement of the beam structure 171. When the beam structure 171 includes an adapter 1711 and a beam body 1712, the second connector 172 is connected to the beam body 1712. The material of the second connector 172 can be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, copper, etc. The connection method between the second connector 172 and the beam structure 171 can be, but is not limited to, welding, bonding, fastening connection, etc. The second connector 172 can be, but is not limited to, a limit bar, a limit plate, etc.

[0239] 4 and 5 , the constraint structure 17 further includes a second fastener 173, and the second connector 172 is connected to the beam structure 171 via the second fastener 173. The second fastener 173 may be, but is not limited to, a bolt, a screw, a rivet, or the like.

[0240] In some embodiments, referring to both FIG. 4 and FIG. 5 , when the second connecting member 172 is a limiting bar, the number of the second connecting members 172 may be multiple. The number of the second connecting members 172 may be determined based on actual application needs. For example, the number of the second connecting members 172 may be two, three, four, five, six, etc. The multiple second connecting members 172 are arranged in parallel along the length direction of the beam structure 171 , with one end of the second connecting member 172 connected to one beam structure 171 and the other end of the second connecting member 172 connected to another beam structure 171 .

[0241] In other embodiments, when the second connector 172 is a limit plate, the limit plate is positioned between and connected to two adjacent beam structures 171. In other embodiments, a cooling channel may be formed within the second connector 172 to provide space for the flow of a cooling medium to exchange heat with the battery cell assembly 20. In other words, in this embodiment, the second connector 172 not only serves to limit the relative position of two adjacent beam structures 171, but also serves as a heat exchange component to exchange heat with the battery cell assembly 20.

[0242] By adopting the above technical solution, the relative positions of two adjacent beam structures 171 are effectively restricted, thereby further reducing the risk of deformation or displacement of the beam structure 171.

[0243] In some embodiments of the present application, please refer to FIG. 4 and FIG. 5 , the second connecting member 172 is connected to a side of the beam structure 171 facing away from the box cover 11 .

[0244] It can be understood that when the box cover 11 includes an upper wall 112 and a side wall 113 , the second connecting member 172 is connected to a side of the beam structure 171 facing away from the upper wall 112 .

[0245] By adopting the above technical solution, the risk of interference between the second connecting member 172 and the battery cell group 20 is effectively reduced, and the second connecting member 172 is easily connected to the beam structure 171.

[0246] In some embodiments of the present application, referring to FIG. 3 , the battery 100 further includes a second thermal management component 40 , which is attached between two adjacent battery cells 21 .

[0247] The second thermal management component 40 is a component for exchanging heat for the battery cell group 20. The second thermal management component 40 can be, but is not limited to, a liquid cooling component, an air cooling component, a metal heat conducting component, and the like.

[0248] In some embodiments, the second thermal management component 40 is a liquid cooling plate, with one surface of the second thermal management component 40 attached to one battery cell 21, and the other surface of the second thermal management component 40 attached to another battery cell 21. The battery 100 may further include a second liquid inlet pipe and a second liquid outlet pipe, with the second liquid inlet pipe connected to the liquid inlet of the second thermal management component 40, and the second liquid outlet pipe connected to the liquid outlet of the second thermal management component 40. Coolant flows along the second liquid inlet pipe through the liquid inlet of the second thermal management component 40 into the cooling channel of the second thermal management component 40, and then is discharged from the liquid outlet of the second thermal management component 40 along the second liquid outlet pipe to the outside, thereby achieving circulation of the coolant within the second thermal management component 40, thereby effectively exchanging heat with the battery cell group 20.

[0249] In other embodiments of the present application, referring to FIG. 12 , the battery 100 further includes a third thermal management component 50 . The third thermal management component 50 is disposed between the battery cell group 20 and the case cover 11 and is attached to the battery cell group 20 .

[0250] The third thermal management component 50 is a component for exchanging heat for the battery cell group 20. The third thermal management component 50 can be, but is not limited to, a liquid cooling component, an air cooling component, a metal heat conducting component, and the like.

[0251] In some embodiments, the third thermal management component 50 is a liquid cooling plate. One surface of the third thermal management component 50 is attached to the battery cell assembly 20, and the other surface of the third thermal management component 50 can be attached to the case cover 11 or spaced apart from the case cover 11. The battery 100 can also include a third liquid inlet pipe and a third liquid outlet pipe. The third liquid inlet pipe is connected to the liquid inlet of the third thermal management component 50, and the third liquid outlet pipe is connected to the liquid outlet of the third thermal management component 50. Coolant flows along the third liquid inlet pipe through the liquid inlet of the third thermal management component 50 into the cooling channel of the third thermal management component 50, and then is discharged from the liquid outlet of the third thermal management component 50 along the third liquid outlet pipe. This allows the coolant to circulate within the third thermal management component 50, thereby effectively removing heat from the battery cell assembly 20.

[0252] In some other embodiments of the present application, the battery 100 may include at least two of a first thermal management component 30, a second thermal management component 40, and a third thermal management component 50. The first thermal management component 30 is disposed between the cell pack 20 and the protective plate 14 and attached to the cell pack 20, the second thermal management component 40 is attached between two adjacent battery cells 21, and / or the third thermal management component 50 is disposed between the cell pack 20 and the case cover 11 and attached to the cell pack 20. Electrical leads are disposed on other portions of the housing except for portions facing the first thermal management component 30, the second thermal management component 40, and the third thermal management component 50.

[0253] By adopting the above technical solution, the heat exchange performance of the battery 100 is effectively improved, thereby effectively improving the safety of the battery 100.

[0254] In some embodiments of the present application, the battery cell group 20 is bonded to the box cover 11 .

[0255] In some embodiments, an adhesive layer may be coated on the box cover 11 , and the battery cell group 20 may be placed on the adhesive layer. After the adhesive layer solidifies, the battery cell group 20 may be bonded to the box cover 11 .

[0256] In other embodiments, the battery cell group 20 may be placed on the box cover 11 , and adhesive may be poured onto the box cover 11 . After the adhesive layer solidifies, the battery cell group 20 may be bonded to the box cover 11 .

[0257] By adopting the above technical solution, the force between the battery cell group 20 and the box cover 11 can be made more uniform, and the assembly process of the battery cell group 20 and the box cover 11 can be simplified, thereby effectively improving the assembly efficiency of the battery 100.

[0258] In some embodiments of the present application, please refer to Figures 2 to 12 together. The battery box 10 includes a box cover 11, a frame 12, a guard plate 14, a mounting assembly 16, and a restraint structure 17. The box cover 11 and the frame 12 are connected in sequence along the gravity direction of the battery 100. The box cover 11 and the frame 12 are used to connect to the vehicle frame 200, and the battery cell group 20 is connected to the box cover 11. The box cover 11 has a first cavity 111, and the frame 12 has a second cavity 121. The first cavity 111 and the second cavity 121 are interconnected to form a receiving cavity 13. A portion of the battery cell group 20 is accommodated in the first cavity 111, and another portion of the battery cell group 20 is accommodated in the second cavity 121. The frame 12 includes a first support beam 122. The first support beam 122 extends along the length direction of the battery 100 and is located on one side of the battery 100 along the width direction. The first support beam 122 includes a support beam body 1221 and an energy-absorbing beam body 1222. The energy-absorbing beam body 1222 includes a main beam body 12221 and a first energy-absorbing body 12222. The main beam body 12221 is connected to the side of the support beam body 1221 facing away from the cavity 13 and defines a first energy-absorbing cavity 12223. The first energy-absorbing body 12222 is disposed within the first energy-absorbing cavity 12223. The first energy-absorbing body 12222 is an energy-absorbing rib extending along the length of the main beam body 12221 and connected between two opposing walls of the main beam body 12221. A protective plate 14 is provided on the side of the frame body 12 facing away from the box cover 11. At least a portion of the energy-absorbing beam body 1222 protrudes from the protective plate 14 in the width direction of the battery 100. The protective plate 14 includes a first plate 142, a second plate 143, and a second energy absorber 144. The first plate 142 and the second plate 143 are spaced apart along the height direction of the battery 100 to form a second energy absorption cavity 141. The second energy absorber 144 is disposed within the second energy absorption cavity 141 and extends along the width direction of the battery 100. The second energy absorber 144 is an energy absorbing rib connected between the first plate 142 and the second plate 143. The thickness direction of the second energy absorber 144 is inclined relative to the height direction of the battery 100. There are multiple second energy absorbers 144, and the multiple second energy absorbers 144 are arranged in parallel along a direction perpendicular to their length. The thickness directions of two adjacent second energy absorbers 144 are inclined in different directions relative to the height direction of the battery 100. The mounting assembly 16 includes a support member 161 and a first connector 162. The support member 161 is connected to the surface of the cover 11 facing away from the cell pack 20 and extends along the width of the battery 100. The first connector 162 is connected to the support member 161 and is used to connect to the vehicle frame 200. The restraint structure 17 is disposed within the first cavity 111 and is used to restrain the expansion of the cell pack 20. The restraint structure 17 includes two spaced beam structures 171 and a second connector 172 connected between the beam structures 171. The two beam structures 171 cooperate to clamp the cell pack 20.The beam structure 171 extends along the width direction of the battery 100. The beam structure 171 includes an adapter 1711 and a beam body 1712. The adapter 1711 includes a matching portion 17111 and an installation portion 17112 that are connected to each other. The matching portion 17111 is shaped to match and are connected to at least part of the inner wall surface of the side wall 113. The beam body 1712 is connected to the installation portion 17112.

[0259] In the second aspect, referring to FIG1 , an embodiment of the present application provides an electric device, comprising a frame and a battery 100 as described in any one of the above embodiments, with a box cover 11 connected to the frame.

[0260] It can be understood that when the electric device is a vehicle 1000 , the frame is the frame 200 of the vehicle 1000 .

[0261] The electric device provided in the embodiment of the present application effectively improves the battery life performance of the electric device because it adopts the battery 100 described in any of the above embodiments.

[0262] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery, characterized in that: The battery comprises: The battery box comprises a box cover and a frame, wherein the box cover is arranged on the frame and the frame encloses a cavity, and the box cover is used to connect to an external frame; The battery cell group is accommodated in the cavity, and the battery cell group is connected to the box cover.

2. The battery according to claim 1, characterized in that The box cover has a first cavity, the frame has a second cavity, the first cavity and the second cavity are connected to each other to form the containing cavity, and at least part of the battery cell group is contained in the first cavity.

3. The battery according to claim 2, characterized in that The maximum depth of the second cavity is smaller than the maximum depth of the first cavity; and / or the minimum depth of the second cavity is smaller than the maximum depth of the first cavity.

4. The battery according to any one of claims 1 to 3, characterized in that The frame body includes a first support beam, and the first support beam includes a support beam body and an energy absorbing beam body, and the energy absorbing beam body is connected to a side of the support beam body facing away from the cavity.

5. The battery according to claim 4, characterized in that The energy absorbing beam body comprises a main beam body, which is connected to a side of the supporting beam body facing away from the cavity and has a first energy absorbing cavity.

6. The battery according to claim 5, characterized in that The energy absorbing beam body further includes a first energy absorbing body, and the first energy absorbing body is arranged in the first energy absorbing cavity.

7. The battery according to claim 6, characterized in that The first energy absorbing body is an energy absorbing rib and extends along the length direction of the main beam body. The first energy absorbing body is connected between two opposite walls of the main beam body.

8. The battery according to any one of claims 4 to 7, characterized in that The first support beam extends along the length direction of the battery and is located at one side of the battery along the width direction.

9. The battery according to any one of claims 4 to 8, characterized in that The battery box also includes a protective plate covering the side of the frame body facing away from the box cover, and the protective plate has a second energy absorption cavity.

10. The battery according to claim 9, characterized in that The guard plate includes a first plate body, a second plate body and a second energy absorbing body. The first plate body and the second plate body are spaced apart along the height direction of the battery to form the second energy absorbing cavity. The second energy absorbing body is arranged in the second energy absorbing cavity.

11. The battery according to claim 10, characterized in that The second energy absorbing body is an energy absorbing rib, and the second energy absorbing body is connected between the first plate body and the second plate body.

12. The battery according to claim 11, characterized in that The thickness direction of the second energy absorber is inclined relative to the height direction of the battery.

13. The battery according to claim 12, characterized in that There are multiple second energy absorbers, which are arranged in parallel along a direction perpendicular to the length direction of the second energy absorbers, and thickness directions of two adjacent second energy absorbers are inclined in different directions relative to the height direction of the battery.

14. The battery according to any one of claims 11 to 13, characterized in that The second energy absorber extends along a width direction of the battery.

15. The battery according to any one of claims 9 to 14, characterized in that In a direction perpendicular to the length direction of the first support beam, at least a portion of the energy absorbing beam body protrudes from the guard plate.

16. The battery according to any one of claims 1 to 8, characterized in that The battery box also includes a guard plate, and the guard plate cover is arranged on a side of the frame body facing away from the box cover.

17. The battery according to claim 16, characterized in that The battery cell group is connected to the guard plate.

18. The battery according to claim 16 or 17, characterized in that The battery box further comprises a sealing member, and the sealing member is arranged between the frame body and the guard plate.

19. The battery according to any one of claims 16 to 18, characterized in that The battery further includes a first thermal management component, which is disposed between the battery cell group and the guard plate and attached to the battery cell group.

20. The battery according to any one of claims 1 to 19, characterized in that The frame is used to connect to the external frame.

21. The battery according to any one of claims 1 to 20, characterized in that The battery box also includes a mounting assembly, the box cover is connected to the mounting assembly, and the mounting assembly is used to connect to the external frame.

22. The battery according to claim 21, characterized in that At least part of the mounting assembly includes a support member and a first connecting member, wherein the support member is connected to the box cover, and the first connecting member is connected to the support member and is used to connect to the external frame.

23. The battery according to claim 22, characterized in that The box cover comprises an upper wall, the battery cell group is connected to the lower part of the upper wall, the support member is connected to the upper wall, and the first connecting member connects the support member and the upper wall to the external frame.

24. The battery according to claim 23, characterized in that The support member is connected to the upper portion of the upper wall and extends along the width direction of the battery.

25. The battery according to any one of claims 1 to 22, characterized in that The battery box further comprises a restraining structure disposed on the box cover, wherein the restraining structure is used to restrain the expansion of the battery cell group.

26. The battery according to claim 25, characterized in that The restraining structure includes two beam structures arranged at intervals, and the two beam structures cooperate to clamp the battery cell group.

27. The battery according to claim 26, characterized in that The box cover includes an upper wall and a side wall. The beam structure extends along the width direction of the battery. The beam structure is connected to at least one of the upper wall and the side wall.

28. The battery according to claim 27, characterized in that The beam structure includes a transition piece and a beam body. The transition piece includes a matching portion and a mounting portion that are connected to each other. The matching portion is matched with at least a portion of the inner wall surface of the side wall in shape and connected to each other. The beam body is connected to the mounting portion.

29. The battery according to claim 26, characterized in that The restraining structure further includes a second connecting member, wherein the second connecting member is connected between the two beam structures.

30. The battery according to claim 29, characterized in that The second connecting member is connected to a side of the beam structure facing away from the box cover.

31. The battery according to any one of claims 1 to 30, characterized in that The battery cell group includes a plurality of battery cells, the battery further includes a second thermal management component, the second thermal management component is attached between two adjacent battery cells, and / or, The battery further includes a third thermal management component, which is disposed between the battery cell group and the box cover and attached to the battery cell group.

32. The battery according to any one of claims 1 to 31, characterized in that The battery cell group is bonded to the box cover.

33. An electric device, characterized in that: The electric device comprises a frame and a battery as described in any one of claims 1-32, and the box cover is connected to the frame.

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