Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment. The battery device comprises a box body, a bracket, a first battery monomer and a second battery monomer, the bracket is arranged in the box body and divides the internal space of the box body into a first accommodating space and a second accommodating space which are positioned on two sides of the bracket; the first battery monomer is arranged in the first accommodating space and is supported on the box body; the second single battery is arranged in the second accommodating space and is supported on the bracket; wherein a first protrusion is formed on the wall body of the box body, and the support is connected to the first protrusion. According to the technical scheme provided by the invention, the assembly efficiency of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery devices, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] During the manufacturing process of battery devices, the assembly efficiency of the battery devices is an issue that cannot be ignored. Therefore, how to improve the assembly efficiency of battery devices is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can improve the assembly efficiency of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, embodiments of the present application provide a battery device comprising a housing, a bracket, a first battery cell, and a second battery cell. The bracket is disposed within the housing, dividing the interior of the housing into a first accommodating space and a second accommodating space located on either side of the bracket. The first battery cell is disposed in the first accommodating space and supported by the housing. The second battery cell is disposed in the second accommodating space and supported by the bracket. A first protrusion is formed on a wall of the housing, and the bracket is connected to the first protrusion.

[0007] According to the battery device of the embodiment of the present application, the second battery cell can be integrated into the bracket, and the bracket is connected to the first protrusion, so that the first battery cell and the first bottom wall can be assembled, and the second battery cell and the bracket can be assembled at the same time, saving the assembly time of the battery device and improving the assembly efficiency of the battery; at the same time, the first protrusion is formed on the wall of the box body, and the bracket is connected to the first protrusion. The structure after the bracket and the first protrusion are assembled has a high assembly strength, so that the battery device has higher reliability.

[0008] According to some embodiments of the present application, the box body includes a first box body and a second box body arranged opposite to each other along a first direction, the first box body and the second box body are buckled together, a first protrusion is formed on the first box body, the first box body and the bracket form a first accommodating space, and the second box body and the bracket form a second accommodating space.

[0009] In the above solution, the first box body and the second box body are buckled together, and the first protrusion is formed on the first box body to facilitate the assembly of the first battery cell and the second battery cell with the box body.

[0010] According to some embodiments of the present application, the first box body includes a first bottom wall and a first side wall. The first side wall surrounds the first bottom wall. The first bottom wall supports the first battery cell, and the first protrusion is provided at one end of the first side wall facing away from the first bottom wall.

[0011] In the above solution, the first bottom wall supports the first battery cell, facilitating the assembly and positioning of the first battery cell. The first protrusion is provided at one end of the first side wall facing away from the first bottom wall, facilitating the assembly of the bracket and the first protrusion, and reducing the interference of the first protrusion and the bracket on the first battery cell.

[0012] According to some embodiments of the present application, the first side wall includes two first sub-side walls oppositely arranged in a second direction. The first battery cell is arranged between the two first sub-side walls. The first protrusion is formed on the inner surface of the first sub-side wall. The second direction is perpendicular to the first direction.

[0013] In the above solution, the two first sub-side walls are parallel to each other. The first battery cell is arranged between the two first sub-side walls to facilitate the protection of the first battery cell. The first protrusion is formed on the inner surface of the first sub-side wall. The two ends of the bracket in the second direction are respectively connected to the first protrusions of the two first sub-side walls, facilitating the assembly of the bracket and the first side wall, and the connection between the bracket and the first side wall is stable.

[0014] According to some embodiments of the present application, the first protrusion extends in a third direction. The third direction, the second direction, and the first direction are perpendicular to each other in pairs.

[0015] In the above solution, the first protrusion has a larger size in the third direction, so that the bracket and the first protrusion have a larger connection area in the third direction, and the connection between the bracket and the first protrusion is stable.

[0016] According to some embodiments of the present application, the first side wall includes two second sub-side walls oppositely arranged in a third direction. The first box body further includes a first beam and a second beam arranged at intervals in the third direction. The first beam and the second beam are connected to the first bottom wall. The first beam and the second beam are located between the two second sub-side walls. The first battery cell is located between the first beam and the second beam. The third direction is perpendicular to the first direction.

[0017] In the above solution, the bracket, the first beam, the second beam, the first bottom wall, and the two first sub-side walls enclose a first accommodation space for accommodating the first battery cell. At the same time, the first beam and the second beam respectively cooperate with the first battery cell to facilitate the protection of the first battery cell in the third direction and reduce the risk of damage to the first battery cell.

[0018] According to some embodiments of the present application, cavities are formed inside the first beam and the second beam.

[0019] In the above solution, cavities are formed inside the first beam and the second beam, and the first beam and the second beam may be expansion beams so as to absorb the force acting on the first battery cell in the third direction.

[0020] According to some embodiments of the present application, there are multiple first battery cells, and the multiple first battery cells are stacked along a third direction; the battery device also includes a first restraining member, which extends along the third direction. The first restraining member is located on the side of the first battery cell away from the first bottom wall, and the first restraining member is connected to the first battery cell, and the two ends of the first restraining member are respectively connected to the first beam and the second beam.

[0021] In the above scheme, multiple first battery cells are stacked along the third direction, the two ends of the first restraint are respectively connected to the first beam and the second beam, and the first restraint is connected to the first battery cell. The first restraint can restrain the first battery cell from moving in the direction away from the first bottom wall. At the same time, the first restraint can also cooperate with the first beam and the second beam to restrain the expansion and deformation of the first battery cell in the third direction.

[0022] According to some embodiments of the present application, there are multiple first restraining members, and the multiple first restraining members are spaced apart along the second direction, and the second direction, the third direction and the first direction are perpendicular to each other.

[0023] In the above scheme, multiple first restraining members are arranged at intervals along the second direction, which can realize the connection between the first beam and the second beam at multiple positions in the second direction, further limit the movement of the first battery cell in the direction away from the first bottom wall, and further restrain the expansion and deformation of the first battery cell in the third direction.

[0024] According to some embodiments of the present application, the first protrusion is provided with a first mounting hole, the bracket is provided with a second mounting hole corresponding to the first mounting hole, and the battery device further includes a locking member, which is passed through the second mounting hole and the first mounting hole to lock the bracket to the first protrusion.

[0025] In the above solution, the bracket is locked to the first protrusion by the locking member, which facilitates the assembly of the bracket and the first protrusion. The bracket and the first protrusion are firmly connected and are easy to disassemble.

[0026] According to some embodiments of the present application, the bracket includes a support wall, the support wall is located between the first battery cell and the second battery cell, the support wall supports the second battery cell, and the support wall is connected to the first protrusion.

[0027] In the above solution, the support wall is located between the first battery cell and the second battery cell to separate the first battery cell and the second battery cell; the second battery cell can be integrated into the support wall to improve the assembly efficiency of the battery device.

[0028] According to some embodiments of the present application, the support wall includes a main body and an extension portion, the main body supports the second battery cell, the main body has a first surface and a second surface arranged opposite to each other along a first direction, and an outer peripheral surface connecting the first surface and the second surface, the extension portion protrudes from the outer peripheral surface and is connected to the first protrusion, and the first accommodating space and the second accommodating space are distributed along the first direction.

[0029] In the above scheme, the main body has a high strength so that the main body can support the second battery cell; the extension portion protrudes from the outer peripheral surface of the main body and is connected to the first protrusion to facilitate the assembly of the support wall and the first protrusion; in addition, the extension portion can be integrally formed with the main body so that the support wall has a high overall strength.

[0030] According to some embodiments of the present application, the bracket also includes two second side walls arranged opposite to each other along a third direction, the two second side walls are connected to the support wall, the second battery cell is arranged between the two second side walls, the third direction is perpendicular to the first direction, and the first accommodating space and the second accommodating space are distributed along the first direction.

[0031] In the above solution, the two second side walls are connected to the support wall, and the two second side walls and the support wall form a space for accommodating the second battery cell. At the same time, the second side walls cooperate with the second battery cell to protect the second battery cell in the third direction and reduce the risk of damage to the second battery cell.

[0032] According to some embodiments of the present application, the number of second battery cells is multiple, and the multiple second battery cells are stacked along a third direction; the battery device also includes a second restraining member, the second restraining member extends along the third direction, the second restraining member is located on the side of the second battery cell away from the support wall, the second restraining member is connected to the second battery cell, and the two ends of the second restraining member are respectively connected to the two second side walls.

[0033] In the above scheme, multiple second battery cells are stacked along the third direction, the two ends of the second restraint are respectively connected to the two second side walls, and the second restraint is connected to the second battery cell. The second restraint can restrain the second battery cell from moving in the direction away from the support wall. At the same time, the second restraint can also cooperate with the two second side walls to restrain the expansion and deformation of the second battery cell in the third direction.

[0034] According to some embodiments of the present application, there are multiple second restraining members, and the multiple second restraining members are spaced apart along the second direction, and the second direction, the third direction and the first direction are perpendicular to each other.

[0035] In the above solution, a plurality of second restraint members are arranged at intervals in the second direction, capable of connecting the two second side walls at multiple positions in the second direction, further restricting the movement of the second battery cell in the direction away from the support wall, and further constraining the expansion deformation of the second battery cell in the third direction.

[0036] According to some embodiments of the present application, a cavity is formed inside the second side wall.

[0037] In the above solution, a cavity is formed inside the second side wall, and the second side wall can be an expansion beam to facilitate absorbing the acting force of the second battery cell in the third direction.

[0038] According to some embodiments of the present application, the box body includes a first bottom wall that supports the first battery cell. A first flow channel is formed inside the first bottom wall, and the first flow channel is used to accommodate a heat exchange medium; a second flow channel is formed inside the bracket, and the second flow channel is used to accommodate a heat exchange medium.

[0039] In the above solution, the first flow channel accommodates the heat exchange medium to facilitate heat exchange between the first bottom wall and the first battery cell, and adjust the temperature of the first battery cell; the second flow channel accommodates the heat exchange medium to facilitate heat exchange between the bracket and the second battery cell, and adjust the temperature of the second battery cell. At the same time, since the bracket is located between the second battery cell and the first battery cell, the bracket can also perform heat exchange with the first battery cell to adjust the temperature of the first battery cell.

[0040] According to some embodiments of the present application, the battery device further includes a first liquid inlet branch pipe, a second liquid inlet branch pipe, and a liquid inlet main pipe. The first liquid inlet branch pipe is connected to the first bottom wall and communicates with the first flow channel. The second liquid inlet branch pipe is connected to the bracket and communicates with the second flow channel. The first liquid inlet branch pipe and the second liquid inlet branch pipe are both connected to the liquid inlet main pipe; and / or, the battery device further includes a first liquid outlet branch pipe, a second liquid outlet branch pipe, and a liquid outlet main pipe. The first liquid outlet branch pipe is connected to the first bottom wall and communicates with the first flow channel. The second liquid outlet branch pipe is connected to the bracket and communicates with the second flow channel. The first liquid outlet branch pipe and the second liquid outlet branch pipe are both connected to the liquid outlet main pipe.

[0041] In the above solution, the first liquid inlet branch pipe and the second liquid inlet branch pipe are respectively connected to the liquid inlet main pipe to facilitate transporting the heat exchange medium to the first flow channel and the second flow channel through the liquid inlet main pipe; the first liquid outlet branch pipe and the second liquid outlet branch pipe are respectively connected to the liquid outlet main pipe to facilitate outputting the heat exchange medium flowing out of the first flow channel and the second flow channel through the liquid outlet main pipe.

[0042] In a second aspect, an embodiment of the present application further provides an electrical device, which includes the battery device provided in any of the above embodiments.

[0043] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Brief Description of the Drawings

[0044] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related accompanying drawings can also be obtained based on these accompanying drawings without creative efforts.

[0045] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0046] Figure 2 Exploded structural schematic diagram of a battery device provided for some embodiments of the present application;

[0047] Figure 3 Schematic diagram of a first battery cell and a second battery cell provided for some embodiments of the present application;

[0048] Figure 4 Cross-sectional view of a partial structure of a battery device provided for some embodiments of the present application;

[0049] Figure 5 Cross-sectional view of a battery device provided for some embodiments of the present application;

[0050] Figure 6 Structural schematic diagram of a first box body provided for some embodiments of the present application;

[0051] Figure 7 Structural schematic diagram of a bracket provided for some embodiments of the present application;

[0052] Figure 8 For Figure 4 Local enlarged view of part A;

[0053] Figure 9 Structural schematic diagram of a support wall provided for some embodiments of the present application;

[0054] Figure 10 Partial structural schematic diagram of a battery device provided for some embodiments of the present application;

[0055] Figure 11 For Figure 10 Local enlarged view of part B.

[0056] Icons: 100 - battery device; 11 - first battery cell; 21 - second battery cell; 30 - box body; 30a - first box body; 30b - second box body; 30c - first accommodation space; 30d - second accommodation space; 31 - first bottom wall; 311 - first flow channel; 32 - first side wall; 321 - first sub - side wall; 322 - second sub - side wall; 33 - first protrusion; 331 - first mounting hole; 34 - first beam; 35 - second beam; 40 - bracket; 41 - second mounting hole; 42 - support wall; 421 - body; 4211 - first surface; 4212 - second surface; 4213 - outer peripheral surface; 422 - extension; 4221 - connecting part; 4222 - transition part; 43 - second side wall; 44 - second flow channel; 50 - locking part; 60 - second binding part; 71 - first liquid inlet branch pipe; 72 - second liquid inlet branch pipe; 73 - liquid inlet main pipe; 74 - first liquid outlet branch pipe; 75 - second liquid outlet branch pipe; 76 - liquid outlet main pipe; 80 - first binding part; 200 - controller; 300 - motor; 1000 - vehicle; X - third direction; Y - second direction; Z - first direction. Detailed implementation manners

[0057] The following further describes in detail the implementation manners of the present application in conjunction with the drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion.

[0059] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary - secondary relationship of the indicated technical features.

[0060] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0061] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "linked", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0062] In the present application, the term "and / or" is merely a relational description of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0063] The term "multiple" as used in the present application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0064] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, and the multiple battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0065] In some embodiments, the battery cell assembly is usually formed by arranging multiple battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells with cable ties.

[0066] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0067] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0068] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing multiple battery cells to the box body.

[0069] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. Here, "closed" means covered or closed, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0070] As an example, the box body may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0071] As an example, the box body can be part of the chassis structure of a vehicle. For example, the top cover of the box body can become at least part of the floor of the vehicle, or the frame of the box body can become at least part of the cross beam and longitudinal beam of the vehicle.

[0072] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box body, and a door is provided on at least one side of the box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0073] In the embodiments of the present application, the battery cell can be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material through charging and continue to be used after the battery cell discharges.

[0074] The battery cell can be, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0075] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. There is no special limitation in the embodiments of the present application.

[0076] The development of battery technology needs to consider various design factors at the same time. For example, performance parameters such as energy density, discharge capacity, charge and discharge rate, etc. In addition, the assembly efficiency of the battery also needs to be considered.

[0077] In some embodiments, in order to improve the energy density of the battery device, the battery device needs to be provided with more battery cells. Therefore, multiple layers of battery cells need to be provided inside the box body of the battery device. However, the internal space of the box body of the battery device is limited, and the assembly efficiency of the multiple layers of battery cells is low, resulting in a low assembly efficiency of the battery device.

[0078] In view of this, in order to solve the problem that the low assembly efficiency of the multiple layers of battery cells leads to the low assembly efficiency of the battery device, the embodiments of the present application provide a battery device, which includes a box body, a bracket, a first-layer battery cell and a second-layer battery cell. The bracket is arranged inside the box body, and divides the internal space of the box body into a first accommodation space and a second accommodation space on both sides of the bracket; the first battery cell is arranged in the first accommodation space and supported by the box body; the second battery cell is arranged in the second accommodation space and supported by the bracket; wherein, a first protrusion is formed on the wall body of the box body, and the bracket is connected to the first protrusion. This battery device has a high assembly efficiency.

[0079] In such a battery device, a bracket is disposed between the first battery cell and the second battery cell, and the bracket supports the second battery cell. The bracket is connected to the first protrusion. During the assembly process of the battery device, the assembly of the first battery cell and the first bottom wall, and the assembly of the second battery cell and the bracket can be carried out simultaneously, so as to save the assembly time and improve the assembly efficiency of the battery. At the same time, the first protrusion is formed on the wall of the box body, and the bracket is connected to the first protrusion. The structure after the bracket and the first protrusion are assembled has a high assembly strength, so that the battery device has high reliability.

[0080] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships or aircraft. The power system of the electrical equipment can be composed of the battery device disclosed in the present application.

[0081] The technical solutions described in the embodiments of the present application are applicable to various electrical equipment using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles and spaceships, etc.

[0082] For the convenience of description in the following embodiments, a vehicle as an electrical equipment in an embodiment of the present application is taken as an example for description.

[0083] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000 and used for the circuit system of the vehicle 1000, such as for the working power requirements during the start, navigation and operation of the vehicle 1000.

[0084] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0085] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0086] Please refer to Figures 2 to 5 , Figure 2 which is a schematic exploded view of the battery device provided in some embodiments of the present application, Figure 3 which is a schematic view of the first battery cell and the second battery cell provided in some embodiments of the present application, Figure 4 which is a cross-sectional view of a part of the structure of the battery device provided in some embodiments of the present application, Figure 5 which is a cross-sectional view of the battery device provided in some embodiments of the present application. Some embodiments of the present application provide a battery device 100, which includes a first battery cell 11, a second battery cell 21, a box body 30 and a bracket 40. The bracket 40 is disposed inside the box body 30, and divides the inner space of the box body 30 into a first accommodation space 30c and a second accommodation space 30d on both sides of the bracket 40. The first battery cell 11 is disposed in the first accommodation space 30c and is supported by the box body 30. The second battery cell 21 is disposed in the second accommodation space 30d and is supported by the bracket 40. Wherein, a first protrusion 33 is formed on the wall of the box body 30, and the bracket 40 is connected to the first protrusion 33.

[0087] The box body 30 is used to provide an accommodation space for the first battery cell 11 and the second battery cell 21.

[0088] The bracket 40 cooperates with the box body 30 to divide the interior of the box body 30 into a first accommodation space 30c and a second accommodation space 30d. The first accommodation space 30c is used to accommodate the first battery cell 11, and the second accommodation space 30d is used to accommodate the second battery cell 21.

[0089] In some embodiments, the first accommodation space 30c and the second accommodation space 30d may be distributed along a first direction Z, such that the first battery cell 11 and the second battery cell 21 are arranged along the first direction Z. For example, along the first direction Z, the first battery cell 11 and the second battery cell 21 at least partially overlap.

[0090] Optionally, along the first direction Z, the first battery cell 11 and the second battery cell 21 completely overlap. For example, the first battery cell 11 and the second battery cell 21 may have the same structure to facilitate processing and manufacturing.

[0091] The first battery cell 11 is supported by the box body. For example, the first battery cell 11 is supported by the wall of the box body 30 that encloses the first accommodation space 30c.

[0092] The second battery cell 21 is supported by the bracket 40. For example, the second battery cell 21 is supported by the part of the bracket 40 that encloses the second accommodation space 30d.

[0093] The first protrusion 33 is formed on the wall of the box body 30. The first protrusion 33 can be formed on the inner surface of the wall of the box body 30, or the first protrusion 33 can also be formed on the outer surface of the wall of the box body 30. Herein, the inner surface of the wall of the box body 30 refers to the surface of the wall of the box body 30 that encloses the interior of the box body 30, and the outer surface of the wall of the box body 30 refers to the surface of the wall of the box body 30 that faces away from the interior of the box body 30. The first protrusion 33 is integrally formed with the wall of the box body 30, so that the connection between the first protrusion 33 and the wall of the box body 30 has a high strength, which is convenient for improving the assembly strength between the bracket 40 and the first protrusion 33.

[0094] The second battery cell 21 can be integrated into the bracket 40. During the assembly process of the battery device 100, the assembly of the first battery cell 11 and the box body 30, and the assembly of the second battery cell 21 and the bracket 40 can be carried out synchronously, and then the bracket 40 is connected to the first protrusion 33 to save the assembly time and improve the assembly efficiency.

[0095] The number of the first battery cells 11 can be multiple. The multiple first battery cells 11 can be connected in series, parallel or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple first battery cells 11.

[0096] The number of the second battery cells 21 can be multiple. The multiple second battery cells 21 can be connected in series, parallel or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple second battery cells 21.

[0097] Herein, the first battery cell 11 and the second battery cell 21 can be secondary batteries or primary batteries; the first battery cell 11 and the second battery cell 21 can also be lithium-sulfur batteries, sodium-ion batteries or magnesium-ion batteries, but are not limited thereto.

[0098] According to the battery device 100 of the embodiment of the present application, the second battery cell 21 can be integrated into the bracket 40, and the bracket 40 is connected to the first protrusion 33. The assembly of the first battery cell 11 and the first bottom wall 31, and the assembly of the second battery cell 21 and the bracket 40 can be carried out simultaneously, saving the assembly time of the battery device 100 and improving the assembly efficiency of the battery; meanwhile, the first protrusion 33 is formed on the wall of the box body 30, the bracket 40 is connected to the first protrusion 33, and the structure after the bracket 40 is assembled with the first protrusion 33 has a high assembly strength, making the battery device's 100 reliability high.

[0099] Please refer to Figure 5According to some embodiments of the present application, the box body 30 includes a first box body 30a and a second box body 30b arranged opposite to each other along the first direction Z, the first box body 30a and the second box body 30b are buckled together, and the first protrusion 33 is formed on the first box body 30a. The first box body 30a and the bracket 40 form a first accommodating space 30c, and the second box body 30b and the bracket 40 form a second accommodating space 30d.

[0100] The first box body 30a and the second box body 30b are arranged opposite to each other along the first direction Z, and the first accommodating space 30c and the second accommodating space 30d are distributed along the first direction Z.

[0101] The first box body 30a and the second box body 30b may be two components with the same structure, or the first box body 30a and the second box body 30b may be two components with different structures.

[0102] In some embodiments, the first box body 30a can be a lower box body, and the second box body 30b can be a box cover. For example, after the first battery cell 11 and the second battery cell 21 are respectively assembled with the first box body 30a, the second box body 30b cooperates with the first box body 30a to accommodate the first battery cell 11 and the second battery cell 21 in the accommodating space.

[0103] In the above solution, the first box body 30 a and the second box body 30 b are buckled together, and the first protrusion 33 is formed on the first box body 30 a to facilitate the assembly of the first battery cell 11 and the second battery cell 21 with the box body 30 .

[0104] Please refer to Figure 4 and Figure 5 , and further reference Figure 6 , Figure 6 Schematic diagram of the structure of the first box provided in some embodiments of the present application. According to some embodiments of the present application, the first box 30a includes a first bottom wall 31 and a first side wall 32. The first side wall 32 is arranged around the first bottom wall 31, and the first bottom wall 31 supports the first battery cell 11. The first protrusion 33 is provided on the end of the first side wall 32 facing away from the first bottom wall 31.

[0105] One end of the first side wall 32 is connected to the first bottom wall 31 , and the other end of the first side wall 32 is formed with an opening. The second box body 30 b is buckled with the first box body 30 a and covers the opening.

[0106] In some embodiments, the first battery cell 11 may be bonded to the first bottom wall 31 to facilitate positioning of the first battery cell 11 .

[0107] In some embodiments, the first protrusion 33 may protrude from the inner surface of the first sidewall 32 to facilitate the formation of a connection portion for connecting with the bracket 40 on the inner side of the first sidewall 32. The inner surface of the first sidewall 32 may be the surface of the first sidewall 32 that encloses the first accommodation space 30c.

[0108] In the above solution, the first bottom wall 31 supports the first battery cell 11, facilitating the assembly and positioning of the first battery cell 11. The first protrusion 33 is provided at one end of the first sidewall 32 facing away from the first bottom wall 31, facilitating the assembly of the bracket 40 and the first protrusion 33, and reducing the interference of the first protrusion 33 and the bracket 40 on the first battery cell 11.

[0109] Please refer to Figure 4 and Figure 6 , according to some embodiments of the present application, the first sidewall 32 includes two first sub-sidewalls 321 oppositely arranged along the second direction Y. The first battery cell 11 is disposed between the two first sub-sidewalls 321. The first protrusion 33 is formed on the inner surface of the first sub-sidewall 321. The second direction Y is perpendicular to the first direction Z.

[0110] The first sub-sidewall 321 and the second sub-sidewall are two wall bodies constituting the first sidewall 32. The first sub-sidewall 321 and the second sub-sidewall are spaced apart along the second direction Y, and the first sub-sidewall 321 and the second sub-sidewall are parallel to each other.

[0111] In the second direction Y, the first battery cell 11 is disposed between the two first sub-sidewalls 321. The two first sub-sidewalls 321 protect the first battery cell 11 and reduce the risk of damage to the first sub-sidewall 321.

[0112] The first protrusion 33 is formed on the inner surface of the first sub-sidewall 321. The first protrusions 33 are distributed at both ends of the bracket 40 in the second direction Y to facilitate the connection of the bracket 40 to the first sidewall 32 at both ends in the second direction Y, and the connection between the bracket 40 and the first sidewall 32 is stable.

[0113] Please refer to Figure 6 , according to some embodiments of the present application, the first protrusion 33 extends along the third direction X. The third direction X, the second direction Y, and the first direction Z are perpendicular to each other in pairs.

[0114] The first protrusion 33 extends along the third direction X, and the length direction of the first protrusion 33 may be parallel to the third direction X.

[0115] In some embodiments, on the same first sub-sidewall 321, the number of the first protrusions 33 may be one, and the first protrusions 33 and the bracket 40 have a relatively large connection size; alternatively, on the same first sub-sidewall 321, the number of the first protrusions 33 may also be multiple, and the multiple first protrusions 33 are arranged at intervals along the third direction X on the inner surface of the first sidewall 32, and the multiple first protrusions 33 and the bracket 40 have a relatively large connection area.

[0116] In the above solution, the first protrusions 33 have a relatively large size in the third direction X, so that the bracket 40 and the first protrusions 33 have a relatively large connection area in the third direction X, and the connection between the bracket 40 and the first protrusions 33 is stable.

[0117] Please refer to Figure 3 、 Figure 5 and Figure 6 According to some embodiments of the present application, the first sidewall 32 includes two second sub-sidewalls 322 oppositely arranged along the third direction X; the first box body 30a further includes a first beam 34 and a second beam 35 arranged at intervals along the third direction X, the first beam 34 and the second beam 35 are connected to the first bottom wall 31, the first beam 34 and the second beam 35 are located between the two second sub-sidewalls 322, the first battery cell 11 is located between the first beam 34 and the second beam 35, and the third direction X is perpendicular to the first direction Z.

[0118] In some embodiments, the two ends of the second sub-sidewall 322 in the second direction Y are respectively connected to the two first sub-sidewalls 321. Along the third direction X, the first beam 34 and the second beam 35 are located between the two second sub-sidewalls 322. The bracket 40, the first beam 34, the second beam 35 and the two first sub-sidewalls 321 enclose a first accommodation space 30c, and the first battery cell 11 is accommodated in the first accommodation space 30c.

[0119] In some embodiments, the two ends of the first beam 34 in the second direction Y are respectively connected to the two first sub-sidewalls 321, and the two ends of the second beam 35 in the second direction Y are respectively connected to the two first sub-sidewalls 321.

[0120] In some embodiments, the first beam 34 is welded to the first bottom wall 31, and the second beam 35 is welded to the first bottom wall 31, so that the connection between the first beam 34 and the first bottom wall 31 is firm, and the connection between the second beam 35 and the first bottom wall 31 is firm.

[0121] In the above solution, the bracket 40, the first beam 34, the second beam 35, the first bottom wall 31 and the two first sub-sidewalls 321 enclose a first accommodation space 30c for accommodating the first battery cell 11. At the same time, the first beam 3 and the second beam 35 respectively cooperate with the first battery cell 11, so as to protect the first battery cell 11 in the third direction X and reduce the risk of damage to the first battery cell 11.

[0122] According to some embodiments of the present application, a cavity is formed inside the first beam 34 and inside the second beam 35 .

[0123] The first beam 34 and the second beam 35 can be formed by extrusion molding.

[0124] Reinforcement ribs may be formed inside the first beam 34 and inside the second beam 35 , respectively, so that the first beam 34 and the second beam 35 have higher strength.

[0125] In the above solution, cavities are formed inside the first beam 34 and the second beam 35 . The first beam 34 and the second beam 35 may be expansion beams to absorb the force acting on the first battery cell 11 in the third direction X.

[0126] Please refer to Figure 3 and Figure 5 According to some embodiments of the present application, there are multiple first battery cells 11, and the multiple first battery cells 11 are stacked along the third direction X; the battery device 100 also includes a first restraining member 80, which extends along the third direction X. The first restraining member 80 is located on the side of the first battery cell 11 away from the first bottom wall 31, and the first restraining member 80 is connected to the first battery cell 11. The two ends of the first restraining member 80 are respectively connected to the first beam 34 and the second beam 35.

[0127] The plurality of first battery cells 11 are stacked along the third direction X, and the large surface of the first battery cell 11 may be perpendicular to the third direction X. The large surface of the first battery cell 11 may be a surface with a larger surface area of the first battery cell 11 .

[0128] The first restraining member 80 can be called a pull bar. The two ends of the first restraining member 80 in the third direction X are respectively connected to the first beam 34 and the second beam 35, which can ensure a stable connection between the first beam 34 and the second beam 35 and the first bottom wall 31 and limit the first battery cell 11.

[0129] The first restraining member 80 can be threadedly connected to the first beam 34 and the second beam 35. For example, the first restraining member 80 is respectively provided with a fifth mounting hole at both ends in the third direction X, the first beam 34 has a sixth mounting hole corresponding to the fifth mounting hole, and the second beam 35 has a seventh mounting hole corresponding to the fifth mounting hole. The battery device 100 also includes a second locking member and a third locking member. The second locking member is passed through the fifth mounting hole and the sixth mounting hole to lock one end of the first restraining member 80 to the first beam 34, and the third locking member is passed through the fifth mounting hole and the seventh mounting hole to lock the other end of the first restraining member 80 to the second beam 35.

[0130] In some embodiments, the first restraint member 80 has a certain strength. For example, the material of the first restraint member 80 can be steel.

[0131] In some embodiments, the first restraint member 80 may include a first substrate and a first insulating layer. The material of the substrate can be metal and has relatively high strength. The first insulating layer is disposed on the surface of the first substrate, and at least a part of the first insulating layer is disposed between the first substrate and the first battery cell 11. For example, the first insulating layer can be an insulating sleeve that is sleeved outside the first substrate.

[0132] In some embodiments, the first restraint member 80 and the first battery cell 11 are adhesively bonded by an insulating adhesive, insulating and isolating the first restraint member 80 and the first battery cell 11 while making the connection between the first restraint member 80 and the first battery cell 11 stable.

[0133] In some embodiments, the first beam 34 and the second beam 35 can be expansion beams. When the first battery cell 11 expands and deforms, the first beam 34 and the second beam 35 can absorb the acting force of the first battery cell 11 and restrain the expansion and deformation of the first battery cell 11.

[0134] In the above solution, a plurality of first battery cells 11 are stacked along the third direction X. Two ends of the first restraint member 80 are respectively connected to the first beam 34 and the second beam 35, and the first restraint member 80 connects the first battery cells 11. The first restraint member 80 can restrain the first battery cells 11 from moving in a direction away from the first bottom wall 31. At the same time, the first restraint member 80 can also cooperate with the first beam 34 and the second beam 35 to restrain the expansion and deformation of the first battery cells 11 in the third direction X.

[0135] According to some embodiments of the present application, the number of the first restraint members 80 is plural, and the plural first restraint members 80 are spaced apart along the second direction Y. The second direction Y, the third direction X, and the first direction Z are perpendicular to each other in pairs.

[0136] For example, the number of the first restraint members 80 corresponding to each first battery cell 11 is two, and the two first restraint members 80 are located at two ends of the first battery cell 11 in the second direction Y.

[0137] In some embodiments, the number of the first restraint members 80 can be four. Among the four first restraint members 80, two first restraint members 80 are respectively located at two ends of the first beam 34 (or the second beam 35) in the second direction Y.

[0138] In the above scheme, multiple first restraining members 80 are arranged at intervals along the second direction Y, which can realize the connection between the first beam 34 and the second beam 35 at multiple positions in the second direction Y, further restricting the movement of the first battery cell 11 in the direction away from the first bottom wall 31, and further restraining the expansion and deformation of the first battery cell 11 in the third direction X.

[0139] Please refer to Figure 6 , and further reference Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of the bracket provided in some embodiments of the present application. Figure 8 for Figure 4 According to some embodiments of the present application, the first protrusion 33 is provided with a first mounting hole 331, and the bracket 40 is provided with a second mounting hole 41 corresponding to the first mounting hole 331. The battery device 100 also includes a locking member 50. The locking member 50 is provided through the second mounting hole 41 and the first mounting hole 331 to lock the bracket 40 to the first protrusion 33.

[0140] The bracket 40 may be located on a side of the first protrusion 33 facing away from the first bottom wall 31 .

[0141] The locking member 50 is a component used to lock the bracket 40 to the first protrusion 33. The locking member 50 can be threadedly connected to the first protrusion 33. For example, the first mounting hole 331 can be a threaded hole, and the locking member 50 can have a threaded section corresponding to the first mounting hole 331. The locking member 50 is threadedly engaged with the first mounting hole 331.

[0142] The second mounting hole 41 is coaxially arranged with the first mounting hole 331 . The second mounting hole 41 may be a through hole arranged in the bracket 40 , so that the locking member 50 can be matched with the first mounting hole 331 after passing through the second mounting hole 41 .

[0143] In the above solution, the bracket 40 is locked to the first protrusion 33 by the locking member 50, which facilitates the assembly of the bracket 40 and the first protrusion 33. The bracket 40 and the first protrusion 33 are firmly connected and easy to disassemble.

[0144] Please refer to Figure 4 According to some embodiments of the present application, the bracket 40 includes a support wall 42 , which is located between the first battery cell 11 and the second battery cell 21 , supports the second battery cell 21 , and is connected to the first protrusion 33 .

[0145] The support wall 42 may be a portion of the bracket 40 for supporting the second battery cell 21 , and the support wall 42 is used to connect with the first protrusion 33 .

[0146] Along the first direction Z, the support wall 42 is located between the first battery cell 11 and the second battery cell 21.

[0147] In some embodiments, the second battery cell 21 may be bonded to the surface of the support wall 42 facing away from the first battery cell 11.

[0148] In the above solution, the support wall 42 is located between the first battery cell 11 and the second battery cell 21 to facilitate the separation of the first battery cell 11 and the second battery cell 21; the second battery cell 21 may be integrated with the support wall 42 to improve the assembly efficiency of the battery device 100.

[0149] Please refer to Figure 8 and Figure 9 , Figure 9 which is a schematic structural view of the support wall provided in some embodiments of the present application. According to some embodiments of the present application, the support wall 42 includes a main body 421 and an extension portion 422. The main body 421 supports the second battery cell 21. The main body 421 has a first surface 4211 and a second surface 4212 oppositely arranged along the first direction Z, and an outer peripheral surface 4213 connecting the first surface 4211 and the second surface 4212. The extension portion 422 protrudes from the outer peripheral surface 4213 and is connected to the first protrusion 33. The first accommodation space 30c and the second accommodation space 30d are distributed along the first direction Z.

[0150] The main body 421 is the part of the support wall 42 for supporting the second battery cell 21, and the extension portion 422 is the part of the support wall 42 for connecting to the first protrusion 33.

[0151] The first surface 4211 and the second surface 4212 are two surfaces of the main body 421 oppositely arranged in the first direction Z. The first surface 4211 may be the surface of the main body facing the first bottom wall 31, and the second surface 4212 may be the surface of the main body facing away from the first bottom wall 31.

[0152] The outer peripheral surface 4213 refers to the surface of the main body 421 connecting the first surface 4211 and the second surface 4212. In some embodiments, the outer peripheral surface 4213 may be configured to face the inner surface of the first side wall 32. The extension portion 422 protrudes from the outer peripheral surface 4213 to facilitate the connection of the extension portion 422 to the first protrusion 33.

[0153] In some embodiments, both the extension portion 422 and the main body 421 may be flat plates, and the extension portion 422 is coplanar with the main body 421.

[0154] In some embodiments, please refer to Figure 8, the extension portion 422 may include a connecting portion 4221 and a transition portion 4222. The connecting portion 4221 may be arranged parallel to the main body 421. The transition portion 4222 connects the main body 421 and the connecting portion 4221. Moreover, the connecting portion 4221 is closer to the first protrusion 33 than the main body 421, and the connecting portion 4221 is connected to the first protrusion 33.

[0155] In some embodiments, the main body 421 and the extension portion 422 are integrally formed. For example, the support wall 42 is processed by an extrusion molding method.

[0156] In some embodiments, the support wall 42 has a certain strength, and the material of the support wall 42 may be metal, such as aluminum or aluminum alloy, etc.

[0157] In the above solution, the main body 421 has a relatively high strength to facilitate the main body 421 to support the second battery cell 21; the extension portion 422 protrudes from the outer peripheral surface 4213 of the main body 421 and is connected to the first protrusion 33 to facilitate the assembly of the support wall 42 and the first protrusion 33.

[0158] Please refer to Figure 3 and Figure 7 , according to some embodiments of the present application, the bracket 40 further includes two second side walls 43 arranged oppositely along the third direction X. The two second side walls 43 are connected to the support wall 42, and the second battery cell 21 is arranged between the two second side walls 43. The third direction X is perpendicular to the first direction Z, and the first accommodation space 30c and the second accommodation space 30d are distributed along the first direction Z.

[0159] The second side wall 43 may be welded to the support wall 42 so that the second side wall 43 is firmly connected to the support wall 42.

[0160] The two second side walls 43 may be arranged parallel to each other, and the two second side walls 43 are spaced apart in the third direction X to facilitate the support wall 42 and the two second side walls 43 to enclose a second chamber for accommodating the second battery cell 21.

[0161] The second side wall 43 may cooperate with the second battery cell 21. For example, the second side wall 43 may be attached to the second battery cell 21, or a gasket, such as a heat insulation pad or a buffer pad, etc., may be provided between the second side wall 43 and the second battery cell 21, and the second side wall 43 may be connected to the second battery cell 21 through the gasket.

[0162] In the above solution, the two second side walls 43 are connected to the support wall 42, and the two second side walls 43 and the support wall 42 enclose a space for accommodating the second battery cell 21. At the same time, the second side wall 43 cooperates with the second battery cell 21 to facilitate the protection of the second battery cell 21 in the third direction X and reduce the risk of damage to the second battery cell 21.

[0163] Please refer to Figure 3 and Figure 7 According to some embodiments of the present application, the number of the second battery cells 21 is plural, and the plural second battery cells 21 are stacked along a third direction X; the battery device 100 further includes a second binding member 60, the second binding member 60 extends along the third direction X, the second binding member 60 is located on a side of the second battery cell 21 away from the support wall 42, the second binding member 60 connects the second battery cells 21, and two ends of the second binding member 60 are respectively connected to two second side walls 43.

[0164] The plural second battery cells 21 are stacked along the third direction X, and a major surface of the second battery cell 21 may be perpendicular to the third direction X. The major surface of the second battery cell 21 may be a surface with a larger surface area of the second battery cell 21.

[0165] The second binding member 60 may be referred to as a tie bar. Two ends of the second binding member 60 in the third direction X are respectively connected to two second side walls 43, which can make the connection between the second side wall 43 and the support wall 42 stable, and can also limit the second battery cell 21.

[0166] The second binding member 60 may be threadedly connected to the second side wall 43. For example, third mounting holes are respectively provided at two ends of the second binding member 60 in the third direction X, the second side wall 43 has fourth mounting holes corresponding to the third mounting holes, and the battery device 100 further includes a first locking member, and the first locking member passes through the third mounting hole and the fourth mounting hole to lock the second binding member 60 to the second side wall 43.

[0167] In some embodiments, the second binding member 60 has a certain strength. For example, the material of the second binding member 60 may be steel.

[0168] In some embodiments, the second binding member 60 may include a second base body and a second insulating layer. The material of the second base body may be metal and has relatively high strength. The second insulating layer is disposed on the surface of the second base body, and at least a part of the second insulating layer is disposed between the second base body and the second battery cell 21. For example, the second insulating layer may be an insulating sleeve, and the insulating sleeve is sleeved outside the second base body.

[0169] In some embodiments, the second binding member 60 and the second battery cell 21 are bonded by an insulating adhesive, which insulates the second binding member 60 and the second battery cell 21 while making the connection between the second binding member 60 and the second battery cell 21 stable.

[0170] In some embodiments, the second sidewall 43 can be an expansion beam. When the second battery cell 21 expands and deforms, the second sidewall 43 can absorb the acting force of the second battery cell 21 and restrain the expansion and deformation of the second battery cell 21.

[0171] In the above solution, a plurality of second battery cells 21 are stacked along the third direction X. Two ends of the second restraint member 60 are respectively connected to two second sidewalls 43, and the second restraint member 60 is connected to the second battery cell 21. The second restraint member 60 can restrain the second battery cell 21 from moving in a direction away from the support wall 42. At the same time, the second restraint member 60 can also cooperate with the two second sidewalls 43 to restrain the expansion and deformation of the second battery cell 21 in the third direction X.

[0172] According to some embodiments of the present application, the number of the second restraint members 60 can be multiple. The multiple second restraint members 60 are arranged at intervals along the second direction Y. The second direction Y, the third direction X, and the first direction Z are perpendicular to each other in pairs.

[0173] For example, the number of the second restraint members 60 corresponding to each second battery cell 21 is two, and the two second restraint members 60 are located at two ends of the second battery cell 21 in the second direction Y.

[0174] In some embodiments, the number of the second restraint members 60 can be four. Among the four second restraint members 60, two second restraint members 60 are respectively located at two ends of the second sidewall 43 in the second direction Y.

[0175] In the above solution, the multiple second restraint members 60 are arranged at intervals along the second direction Y, which can realize the connection of the two second sidewalls 43 at multiple positions in the second direction Y, further restrict the movement of the second battery cell 21 in a direction away from the support wall 42, and further restrain the expansion and deformation of the second battery cell 21 in the third direction X.

[0176] Please refer to Figure 7 , according to some embodiments of the present application, a cavity is formed inside the second sidewall 43.

[0177] The second sidewall 43 can be a structure with a hollow interior, and the second sidewall 43 can be processed by an extrusion molding method.

[0178] Reinforcing ribs can be formed inside the second sidewall 43 so that the second sidewall 43 has higher strength.

[0179] In the above solution, a cavity is formed inside the second sidewall 43. The second sidewall 43 can be an expansion beam to facilitate absorbing the acting force of the second battery cell 21 in the third direction X.

[0180] Please refer to Figure 4, according to some embodiments of the present application, the box body 30 includes a first bottom wall 31, the first bottom wall 31 supports the first battery cell 11, and a first flow channel 311 is formed inside the first bottom wall 31, and the first flow channel 311 is used to accommodate a heat exchange medium; a second flow channel 44 is formed inside the bracket 40, and the second flow channel 44 is used to accommodate a heat exchange medium.

[0181] The first flow channel 311 is a channel formed inside the first bottom wall 31 and used for the flow of the heat exchange medium. After the battery device 100 is assembled, the first flow channel 311 can accommodate a heat exchange medium, so as to perform heat exchange with the first battery cell 11 through the first bottom wall 31. For example, when the heat exchange medium is a cooling medium, the low temperature of the heat exchange medium is transmitted to the first battery cell 11 through the first bottom wall 31, which can reduce the temperature of the first battery cell 11. Also, for example, when the heat exchange medium is a heating medium, the high temperature of the heat exchange medium is transmitted to the first battery cell 11 through the first bottom wall 31, which can increase the temperature of the first battery cell 11.

[0182] In some embodiments, the first bottom wall 31 may have good heat conduction performance, so as to facilitate heat exchange between the heat exchange medium and the first battery cell 11.

[0183] The second flow channel 44 is a channel formed inside the bracket 40 and used for the flow of the heat exchange medium. After the battery device 100 is assembled, the second flow channel 44 can accommodate a heat exchange medium, so as to perform heat exchange with the second battery cell 21 through the bracket 40. For example, when the heat exchange medium is a cooling medium, the low temperature of the heat exchange medium is transmitted to the second battery cell 21 through the bracket 40, which can reduce the temperature of the second battery cell 21. Also, for example, when the heat exchange medium is a heating medium, the high temperature of the heat exchange medium is transmitted to the second battery cell 21 through the bracket 40, which can increase the temperature of the second battery cell 21.

[0184] In some embodiments, the bracket 40 may have good heat conduction performance, so as to facilitate heat exchange between the heat exchange medium and the second battery cell 21 through the bracket 40.

[0185] At the same time, since the bracket 40 is located between the first battery cell 11 and the second battery cell 21, the bracket 40 can also adjust the temperature of the first battery cell 11.

[0186] In some embodiments, the heat exchange medium is a fluid, and the heat exchange medium may be, but is not limited to, water, alcohol or other liquid mixtures.

[0187] In the above solution, the first flow channel 311 accommodates a heat exchange medium to facilitate heat exchange between the first bottom wall 31 and the first battery cell 11, thereby regulating the temperature of the first battery cell 11; the second flow channel 44 accommodates a heat exchange medium to facilitate heat exchange between the bracket 40 and the second battery cell 21, thereby regulating the temperature of the second battery cell 21. At the same time, since the bracket 40 is located between the second battery cell 21 and the first battery cell 11, the bracket 40 can also perform heat exchange with the first battery cell 11 to regulate the temperature of the first battery cell 11.

[0188] Please refer to Figure 4 and further refer to Figure 10 and Figure 11 , Figure 10 which is a partial structural schematic diagram of a battery device provided by some embodiments of the present application. Figure 11 is Figure 10 a partial enlarged view of part B in. According to some embodiments of the present application, the battery device 100 further includes a first liquid inlet branch pipe 71, a second liquid inlet branch pipe 72, and a liquid inlet main pipe 73. The first liquid inlet branch pipe 71 is connected to the first bottom wall 31 and communicates with the first flow channel 311. The second liquid inlet branch pipe 72 is connected to the bracket 40 and communicates with the second flow channel 44. Both the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 communicate with the liquid inlet main pipe 73; and / or, the battery device 100 further includes a first liquid outlet branch pipe 74, a second liquid outlet branch pipe 75, and a liquid outlet main pipe 76. The first liquid outlet branch pipe 74 is connected to the first bottom wall 31 and communicates with the first flow channel 311. The second liquid outlet branch pipe 75 is connected to the bracket 40 and communicates with the second flow channel 44. Both the first liquid outlet branch pipe 74 and the second liquid outlet branch pipe 75 communicate with the liquid outlet main pipe 76.

[0189] In some embodiments, the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 can be connected to the liquid inlet main pipe 73 through a tee pipe, so as to facilitate the heat exchange medium transported by the liquid inlet main pipe 73 to enter the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 respectively.

[0190] The first bottom wall 31 may be provided with a first opening communicating with the first flow channel 311, and the first liquid inlet branch pipe 71 is connected to the first opening, so as to facilitate the communication between the first liquid inlet branch pipe 71 and the first flow channel 311. The first liquid inlet branch pipe 71 is hermetically connected to the first bottom wall 31 to reduce the risk of leakage of the heat exchange medium from the connection between the first liquid inlet branch pipe 71 and the first bottom wall 31.

[0191] The bracket 40 may be provided with a second opening communicating with the second flow channel 44, and the second liquid inlet branch pipe 72 is connected to the second opening, so as to facilitate the communication between the second liquid inlet branch pipe 72 and the second flow channel 44. The second liquid inlet branch pipe 72 is hermetically connected to the bracket 40 to reduce the risk of leakage of the heat exchange medium from the connection between the second liquid inlet branch pipe 72 and the bracket 40.

[0192] In some embodiments, the first liquid outlet branch pipe 74 and the second liquid outlet branch pipe 75 can be connected to the liquid outlet main pipe 76 through a tee pipe, so that the heat exchange medium conveyed by the first liquid outlet branch pipe 74 and the second liquid outlet branch pipe 75 is discharged via the liquid outlet main pipe 76.

[0193] The first bottom wall 31 can be provided with a third opening communicating with the first flow channel 311, and the first liquid outlet branch pipe 74 is connected to the third opening, so as to facilitate the connection between the first liquid outlet branch pipe 74 and the first flow channel 311. The first liquid outlet branch pipe 74 is hermetically connected to the first bottom wall 31 to reduce the risk of leakage of the heat exchange medium from the connection between the first liquid outlet branch pipe 74 and the first bottom wall 31.

[0194] The bracket 40 can be provided with a fourth opening communicating with the second flow channel 44, and the second liquid outlet branch pipe 75 is connected to the fourth opening, so as to facilitate the connection between the second liquid outlet branch pipe 75 and the second flow channel 44. The second liquid outlet branch pipe 75 is hermetically connected to the bracket 40 to reduce the risk of leakage of the heat exchange medium from the connection between the second liquid outlet branch pipe 75 and the bracket 40.

[0195] In some embodiments, the battery device 100 further includes a first liquid inlet branch pipe 71, a second liquid inlet branch pipe 72, a liquid inlet main pipe 73, a first liquid outlet branch pipe 74, a second liquid outlet branch pipe 75 and a liquid outlet main pipe 76. The first liquid inlet branch pipe 71 and the first liquid outlet branch pipe 74 are respectively connected to the first bottom wall 31, and the heat exchange medium circulates in the first flow channel 311; the second liquid inlet branch pipe 72 and the second liquid outlet branch pipe 75 are respectively connected to the bracket 40, and the heat exchange medium circulates in the second flow channel 44.

[0196] In some embodiments, the liquid inlet main pipe 73 and the liquid outlet main pipe 76 are respectively connected to an external container, and the external container contains a heat exchange medium. The external container can be a container for the heat exchange medium of an electrical device.

[0197] In some embodiments, the box body 30 is provided with a first pipe joint connected to the liquid inlet main pipe 73 and a second pipe joint connected to the liquid outlet main pipe 76. The first pipe joint is used to be connected to the external container through a first pipe, and the second pipe joint is used to be connected to the external container through a second pipe.

[0198] In some embodiments, the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 can be arranged in parallel, and the first liquid outlet branch pipe 74 and the second liquid outlet branch pipe 75 can be arranged in parallel.

[0199] In the above solution, the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 are respectively communicated with the liquid inlet main pipe 73, so as to convey the heat exchange medium to the first flow channel 311 and the second flow channel 44 through the liquid inlet main pipe 73; the first liquid outlet branch pipe 74 and the second liquid outlet branch pipe 75 are respectively communicated with the liquid outlet main pipe 76, so as to output the heat exchange medium flowing out of the first flow channel 311 and the second flow channel 44 through the liquid outlet main pipe 76.

[0200] Please refer to Figure 6 and Figure 11 , in some embodiments, when the box body 30 includes two second sub-side walls, the two second sub-side walls are arranged at both ends of the first bottom wall 31 in the third direction X. The first beam and the second beam are arranged between the two second sub-side walls. Along the third direction X, an electrical chamber for accommodating electrical components (such as a high-voltage box, a battery management unit, etc.) is formed between the first beam 34 and the adjacent second sub-side wall 322. The first liquid inlet branch pipe 71, the second liquid inlet branch pipe 72, the liquid inlet main pipe 73, the first liquid outlet branch pipe 74, the second liquid outlet branch pipe 75 and the liquid outlet main pipe 76 are all arranged in this electrical chamber.

[0201] According to some embodiments of the present application, the embodiments of the present application further provide an electrical device, which includes the battery device 100 provided in any one of the above embodiments.

[0202] The battery device 100 is used to provide electric energy.

[0203] According to some embodiments of the present application, please refer to Figures 2 to 11 , the embodiments of the present application provide a battery device 100, which includes a first box body 30a, a second box body 30b, a first battery cell 11, a second battery cell 21 and a bracket 40.

[0204] The first box body 30a and the second box body 30b are arranged opposite to each other along the first direction. The first box body 30a and the second box body 30b are buckled. The bracket 40 is arranged inside the box body 30. The first box body 30a and the bracket 40 enclose a first accommodation space 30c, and the second box body 30b and the bracket 40 enclose a second accommodation space 30d. The first battery cell 11 is accommodated in the first accommodation space 30c, and the second battery cell 21 is accommodated in the second accommodation space 30d. The first accommodation space 30c and the second accommodation space 30d are distributed along the first direction Z.

[0205] Along the first direction Z, the bracket 40 is arranged between the first battery cell 11 and the second battery cell 21.

[0206] The first box body 30a includes a first bottom wall 31 and a first side wall 32. The first side wall 32 surrounds the first bottom wall 31. The first bottom wall 31 supports the first battery cell 11. The first side wall 32 includes two first sub-side walls 321 arranged opposite to each other along the second direction Y. The first battery cell 11 is arranged between the two first sub-side walls 321. The first protrusion 33 is formed on the inner surface of the first sub-side wall 321. The bracket 40 is located on the side of the first protrusion 33 away from the first bottom wall 31. The two ends of the bracket 40 in the second direction Y are respectively connected to the first protrusions 33 on the two first sub-side walls 321. The first protrusion 33 extends along the third direction X. The bracket 40 is locked to the first protrusion 33 through a locking member 50.

[0207] For the battery device 100 according to an embodiment of the present application, the bracket 40 is detachably connected to the first protrusion 33, and the second battery cell 21 can be integrated into the bracket 40. During the assembly process of the battery device 100, the assembly of the first battery cell 11 and the first bottom wall 31, and the assembly of the second battery cell 21 and the bracket 40 can be carried out synchronously, saving assembly time and improving assembly efficiency. At the same time, the bracket 40 is connected to the first protrusion 33, and the first protrusion 33 is formed on the inner surface of the first sub-side wall 321, so that the bracket 40 and the first protrusion 33 have a high assembly efficiency and improve the reliability of the battery device 100.

[0208] Although the present application has been described with reference to the preferred embodiments, various improvements can be made thereto and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; A bracket is disposed in the box body, dividing the internal space of the box body into a first accommodating space and a second accommodating space located on both sides of the bracket; a first battery cell and a second battery cell, wherein the first battery cell is disposed in the first accommodation space and supported by the box body; and the second battery cell is disposed in the second accommodation space and supported by the bracket; Wherein, a first protrusion is formed on the wall of the box body, and the bracket is connected to the first protrusion.

2. The battery device according to claim 1, wherein The box body includes a first box body and a second box body arranged opposite to each other along a first direction, the first box body and the second box body are buckled together, the first protrusion is formed on the first box body, the first box body and the bracket form the first accommodating space, and the second box body and the bracket form the second accommodating space.

3. The battery device according to claim 2, wherein, The first box body includes a first bottom wall and a first side wall. The first side wall is arranged around the first bottom wall and supports the first battery cell. The first protrusion is arranged at an end of the first side wall away from the first bottom wall.

4. The battery device according to claim 3, characterized in that, The first side wall includes two first sub-side walls arranged opposite to each other along a second direction, the first battery cell is arranged between the two first sub-side walls, the first protrusion is formed on the inner surface of the first sub-side wall, and the second direction is perpendicular to the first direction.

5. The battery device according to claim 4, characterized in that, The first protrusion extends along a third direction, and the third direction, the second direction, and the first direction are perpendicular to each other.

6. The battery device according to claim 3, characterized in that, The first side wall includes two second sub-side walls arranged opposite to each other along a third direction; The first box body also includes a first beam and a second beam arranged at intervals along the third direction, the first beam and the second beam are connected to the first bottom wall, the first beam and the second beam are located between the two second sub-side walls, the first battery cell is located between the first beam and the second beam, and the third direction is perpendicular to the first direction.

7. The battery device according to claim 6, characterized in that, A cavity is formed inside the first beam and inside the second beam.

8. The battery device according to claim 6, characterized in that, There are multiple first battery cells, and the multiple first battery cells are stacked along the third direction; The battery device also includes a first restraining member, which extends along the third direction. The first restraining member is located on the side of the first battery cell that is away from the first bottom wall. The first restraining member is connected to the first battery cell, and the two ends of the first restraining member are respectively connected to the first beam and the second beam.

9. The battery device according to claim 8, characterized in that, There are multiple first binding members, and the multiple first binding members are spaced apart along the second direction. The second direction, the third direction, and the first direction are perpendicular to each other.

10. The battery device according to claim 1, characterized in that, The first protrusion is provided with a first mounting hole, the bracket is provided with a second mounting hole corresponding to the first mounting hole, and the battery device further includes a locking member, which is passed through the second mounting hole and the first mounting hole to lock the bracket to the first protrusion.

11. The battery device according to claim 1, wherein The bracket includes a support wall, the support wall is located between the first battery cell and the second battery cell, the support wall supports the second battery cell, and the support wall is connected to the first protrusion.

12. The battery device according to claim 11, wherein The support wall includes a main body and an extension portion, the main body supports the second battery cell, the main body has a first surface and a second surface arranged opposite to each other along a first direction, and an outer peripheral surface connecting the first surface and the second surface, the extension portion protrudes from the outer peripheral surface and is connected to the first protrusion, and the first accommodating space and the second accommodating space are distributed along the first direction.

13. The battery device according to claim 11, characterized in that, The bracket also includes two second side walls arranged opposite to each other along a third direction, the two second side walls are connected to the support wall, the second battery cell is arranged between the two second side walls, the third direction is perpendicular to the first direction, and the first accommodating space and the second accommodating space are distributed along the first direction.

14. The battery device according to claim 13, characterized in that, There are multiple second battery cells, and the multiple second battery cells are stacked along the third direction; The battery device also includes a second restraining member, which extends along the third direction. The second restraining member is located on the side of the second battery cell facing away from the support wall. The second restraining member is connected to the second battery cell, and both ends of the second restraining member are respectively connected to the two second side walls.

15. The battery device according to claim 14, characterized in that, There are multiple second restraining members, and the multiple second restraining members are spaced apart along the second direction. The second direction, the third direction, and the first direction are perpendicular to each other.

16. The battery device according to claim 13, wherein A cavity is formed inside the second side wall.

17. The battery device according to claim 1, characterized in that, The box body includes a first bottom wall, the first bottom wall supports the first battery cell, and a first flow channel is formed inside the first bottom wall, the first flow channel is used to accommodate a heat exchange medium; A second flow channel is formed inside the bracket, and the second flow channel is used to accommodate a heat exchange medium.

18. The battery device according to claim 17, characterized in that, The battery device further includes a first liquid inlet branch pipe, a second liquid inlet branch pipe, and a liquid inlet main pipe, wherein the first liquid inlet branch pipe is connected to the first bottom wall and communicates with the first flow channel, the second liquid inlet branch pipe is connected to the bracket and communicates with the second flow channel, and both the first liquid inlet branch pipe and the second liquid inlet branch pipe are communicated with the liquid inlet main pipe; and / or, The battery device also includes a first liquid outlet branch pipe, a second liquid outlet branch pipe and a liquid outlet main pipe, the first liquid outlet branch pipe is connected to the first bottom wall and communicates with the first flow channel, the second liquid outlet branch pipe is connected to the bracket and communicates with the second flow channel, and the first liquid outlet branch pipe and the second liquid outlet branch pipe are both connected to the liquid outlet main pipe.

19. An electrical device, characterized in that, A battery device comprising the battery device according to any one of claims 1 to 18.

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