Battery device and electric apparatus

Abstract

A battery device (100) and an electric apparatus. The battery device (100) comprises a case (30), a support (40), a first battery cell (11) and a second battery cell (21), wherein the support (40) is disposed inside the case (30) and divides the internal space of the case (30) into a first accommodating space (30c) and a second accommodating space (30d) located on two sides of the support (40); the first battery cell (11) is disposed in the first accommodating space (30c) and supported on the case (30); the second battery cell (21) is disposed in the second accommodating space (30d) and supported on the support (40); and first protrusions (33) are formed on a wall of the case (30), and the support (40) is connected to the first protrusions (33). The technical solution can improve the assembly efficiency of the battery device (100).

Description

Battery devices and electrical equipment Technical Field

[0001] This application relates to the field of battery device technology, and more specifically, to a battery device and an electrical appliance. Background Technology

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

[0003] In the manufacturing process of battery devices, assembly efficiency is a crucial issue. Therefore, improving assembly efficiency is a pressing technical problem that needs to be solved in battery technology.

[0004] Summary of the Invention

[0005] This application provides a battery device and an electrical appliance that can improve the assembly efficiency of the battery device.

[0006] This application is achieved through the following technical solution:

[0007] In a first aspect, embodiments of this application provide a battery device, which includes a housing, a support, a first battery cell, and a second battery cell. The support is disposed within the housing, dividing the internal space of the housing into a first receiving space and a second receiving space located on both sides of the support; the first battery cell is disposed in the first receiving space and supported by the housing; the second battery cell is disposed in the second receiving space and supported by the support; wherein, a first protrusion is formed on the wall of the housing, and the support is connected to the first protrusion.

[0008] According to the battery device of the present application embodiment, the second battery cell can be integrated into the bracket, and the bracket is connected to the first protrusion. The first battery cell can be assembled with the first bottom wall and the second battery cell can be assembled with the bracket 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 housing, and the bracket is connected to the first protrusion. The structure after the bracket and the first protrusion are assembled has high assembly strength, which makes the battery device have high reliability.

[0009] According to some embodiments of this application, the box includes a first box and a second box disposed opposite to each other along a first direction, the first box and the second box are fastened together, a first protrusion is formed on the first box, the first box and the bracket form a first receiving space, and the second box and the bracket form a second receiving space.

[0010] In the above scheme, the first box and the second box are fastened together, and the first protrusion is formed on the first box to facilitate the assembly of the first battery cell and the second battery cell with the box.

[0011] According to some embodiments of this application, the first housing 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 a first protrusion is disposed at one end of the first side wall opposite to the first bottom wall.

[0012] In the above scheme, the first bottom wall supports the first battery cell, which facilitates the assembly and positioning of the first battery cell. The first protrusion is located at the end of the first side wall opposite to the first bottom wall, which facilitates the assembly of the bracket and the first protrusion and reduces the interference of the first protrusion and the bracket on the first battery cell.

[0013] According to some embodiments of this application, the first sidewall includes two first sub-sidewalls disposed opposite each other along a second direction, a first battery cell is disposed between the two first sub-sidewalls, a first protrusion is formed on the inner surface of the first sub-sidewall, and the second direction is perpendicular to the first direction.

[0014] In the above scheme, the two first sub-sidewalls are parallel to each other, and the first battery cell is disposed between the two first sub-sidewalls to protect the first battery cell; the first protrusion is formed on the inner surface of the first sub-sidewall, and the two ends of the bracket in the second direction are respectively connected to the first protrusion of the two first sub-sidewalls to facilitate the assembly of the bracket with the first sidewall, and the bracket is stably connected with the first sidewall.

[0015] According to some embodiments of this application, the first protrusion extends along a third direction, and the third direction, the second direction, and the first direction are perpendicular to each other.

[0016] In the above scheme, 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.

[0017] According to some embodiments of this application, the first sidewall includes two second sub-sidewalls disposed opposite to each other along a third direction; the first housing also includes a first beam and a second beam disposed at intervals along a third direction, the first beam and the second beam being connected to the first bottom wall, the first beam and the second beam being located between the two second sub-sidewalls, the first battery cell being located between the first beam and the second beam, and the third direction being perpendicular to the first direction.

[0018] In the above scheme, the bracket, the first beam, the second beam, the first bottom wall and the two first sub-side walls form a first receiving space for accommodating the first battery cell. At the same time, the first beam and the second beam cooperate with the first battery cell to protect the first battery cell from a third-party perspective and reduce the risk of damage to the first battery cell.

[0019] According to some embodiments of this application, cavities are formed inside both the first beam and the second beam.

[0020] In the above scheme, cavities are formed inside both the first beam and the second beam. The first beam and the second beam can be expansion beams to absorb the force exerted by the first battery cell in the third direction.

[0021] According to some embodiments of this 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 a third direction, is located on the side of the first battery cell away from the first bottom wall, is connected to the first battery cell, and its two ends are respectively connected to the first beam and the second beam.

[0022] In the above scheme, multiple first battery cells are stacked along a third direction. The two ends of the first restraint member are connected to the first beam and the second beam respectively, and the first restraint member is connected to the first battery cell. The first restraint member can constrain the first battery cell to move away from the first bottom wall. At the same time, the first restraint member can also cooperate with the first beam and the second beam to constrain the expansion and deformation of the first battery cell in the third direction.

[0023] According to some embodiments of this application, there are multiple first restraint members, and the multiple first restraint members are spaced apart along the second direction, with the second direction, the third direction and the first direction being perpendicular to each other.

[0024] In the above scheme, multiple first restraint members are spaced apart 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 restricting the movement of the first battery cell away from the first bottom wall, and further constraining the expansion and deformation of the first battery cell in the third direction.

[0025] According to some embodiments of this 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 that passes through the second mounting hole and the first mounting hole to lock the bracket to the first protrusion.

[0026] In the above solution, the bracket is locked to the first protrusion by a locking member, which facilitates the assembly of the bracket and the first protrusion. The bracket and the first protrusion are firmly connected and easy to disassemble.

[0027] According to some embodiments of this application, the bracket includes a support wall located between a first battery cell and a second battery cell, the support wall supporting the second battery cell, and the support wall being connected to a first protrusion.

[0028] In the above scheme, 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.

[0029] According to some embodiments of this application, the support wall includes a body and an extension. The body supports the second battery cell. The body has a first surface and a second surface disposed opposite to each other along a first direction, and an outer peripheral surface connecting the first surface and the second surface. The extension protrudes from the outer peripheral surface and is connected to a first protrusion. The first accommodating space and the second accommodating space are distributed along the first direction.

[0030] In the above scheme, the body has high strength so that it can support the second battery cell; the extension protrudes from the outer peripheral surface of the body and is connected to the first protrusion so as to facilitate the assembly of the support wall and the first protrusion; in addition, the extension can be integrally formed with the body so that the support wall has high overall strength.

[0031] According to some embodiments of this application, the bracket further includes two second sidewalls disposed opposite to each other along a third direction, the two second sidewalls being connected to the support wall, the second battery cell being disposed between the two second sidewalls, the third direction being perpendicular to the first direction, and the first accommodating space and the second accommodating space being distributed along the first direction.

[0032] In the above scheme, two second sidewalls are connected to the support wall, and the two second sidewalls and the support wall form a space for accommodating the second battery cell. At the same time, the second sidewalls cooperate with the second battery cell to protect the second battery cell from a third-party perspective and reduce the risk of damage to the second battery cell.

[0033] According to some embodiments of this application, there are multiple second battery cells, which are stacked along a third direction; the battery device also includes a second restraint member, which extends along a third direction and is located on the side of the second battery cell away from the support wall. The second restraint member is connected to the second battery cell, and its two ends are respectively connected to two second sidewalls.

[0034] In the above scheme, multiple second battery cells are stacked along a third direction. The two ends of the second restraint member are respectively connected to two second sidewalls and the second restraint member is connected to the second battery cells. The second restraint member can constrain the second battery cells to move away from the support wall. At the same time, the second restraint member can also cooperate with the two second sidewalls to constrain the expansion and deformation of the second battery cells in the third direction.

[0035] According to some embodiments of this application, there are multiple second restraint members, and the multiple second restraint members are spaced apart along the second direction, with the second direction, the third direction and the first direction being perpendicular to each other.

[0036] In the above scheme, multiple second restraint members are spaced apart along the second direction, which can realize the connection of the two second sidewalls at multiple positions in the second direction, further restricting the movement of the second battery cell away from the support wall, and further constraining the expansion deformation of the second battery cell in the third direction.

[0037] According to some embodiments of this application, a cavity is formed inside the second sidewall.

[0038] In the above scheme, a cavity is formed inside the second sidewall, and the second sidewall can be an expansion beam to absorb the force of the second battery cell in the third direction.

[0039] According to some embodiments of this application, the housing includes a first bottom wall that supports a first battery cell, and a first flow channel is formed inside the first bottom wall for containing a heat exchange medium; a second flow channel is formed inside the support for containing a heat exchange medium.

[0040] In the above scheme, the first flow channel contains the heat exchange medium to facilitate heat exchange between the first bottom wall and the first battery cell, thereby regulating the temperature of the first battery cell; the second flow channel contains the heat exchange medium to facilitate heat exchange between the support and the second battery cell, thereby regulating the temperature of the second battery cell. At the same time, since the support is located between the second battery cell and the first battery cell, the support can also exchange heat with the first battery cell to regulate the temperature of the first battery cell.

[0041] According to some embodiments of this 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 a first bottom wall and communicates with a first flow channel. The second liquid inlet branch pipe is connected to a bracket and communicates with a second flow channel. Both the first liquid inlet branch pipe and the second liquid inlet branch pipe are 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. Both the first liquid outlet branch pipe and the second liquid outlet branch pipe are connected to the liquid outlet main pipe.

[0042] In the above scheme, the first liquid inlet branch pipe and the second liquid inlet branch pipe are respectively connected to the liquid inlet main pipe so as to transport 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 so as to output the heat exchange medium flowing out of the first flow channel and the second flow channel through the liquid outlet main pipe.

[0043] Secondly, embodiments of this application also provide an electrical device that includes a battery device provided according to any of the above embodiments.

[0044] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 is a schematic diagram of the vehicle structure provided in some embodiments of this application;

[0047] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0048] Figure 3 is a schematic diagram of a first battery cell and a second battery cell provided in some embodiments of this application;

[0049] Figure 4 is a cross-sectional view of a partial structure of a battery device provided in some embodiments of this application;

[0050] Figure 5 is a cross-sectional view of a battery device provided in some embodiments of this application;

[0051] Figure 6 is a structural schematic diagram of the first housing provided in some embodiments of this application;

[0052] Figure 7 is a schematic diagram of the structure of the bracket provided in some embodiments of this application;

[0053] Figure 8 is a magnified view of part A in Figure 4;

[0054] Figure 9 is a schematic diagram of the structure of the support wall provided in some embodiments of this application;

[0055] Figure 10 is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0056] Figure 11 is a magnified view of part B in Figure 10.

[0057] The accompanying drawings are not drawn to scale.

[0058] Marking Explanation: 100 - Battery assembly; 11 - First battery cell; 21 - Second battery cell; 30 - Housing; 30a - First housing; 30b - Second housing; 30c - First receiving space; 30d - Second receiving 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 - 4212 - Second surface; 4213 - Outer peripheral surface; 422 - Extension; 4221 - Connecting part; 4222 - Transition part; 43 - Second sidewall; 44 - Second flow channel; 50 - Locking member; 60 - Second restraining member; 71 - First inlet branch pipe; 72 - Second inlet branch pipe; 73 - Main inlet pipe; 74 - First outlet branch pipe; 75 - Second outlet branch pipe; 76 - Main outlet pipe; 80 - First restraining member; 200 - Controller; 300 - Motor; 1000 - Vehicle; X - Third direction; Y - Second direction; Z - First direction. Detailed Implementation

[0059] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0061] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0062] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0063] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0066] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0067] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0068] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0069] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0070] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0071] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0072] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0073] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0074] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0075] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0076] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0077] 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. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. There are no particular limitations in the embodiments of this application.

[0078] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, battery assembly efficiency also needs to be considered.

[0079] In some embodiments, to improve the energy density of the battery device, a larger number of individual battery cells are required. Therefore, multiple layers of individual battery cells need to be arranged inside the battery device's casing. However, the internal space of the battery device's casing is limited, and the assembly efficiency of multiple layers of individual battery cells is low, resulting in low assembly efficiency of the battery device.

[0080] In view of this, to solve the problem of low assembly efficiency of battery devices due to the low assembly efficiency of multi-layer battery cells, this application provides a battery device including a housing, a support, a first layer of battery cells, and a second layer of battery cells. The support is disposed within the housing, dividing the internal space of the housing into a first receiving space and a second receiving space located on both sides of the support. The first battery cell is disposed in the first receiving space and supported by the housing; the second battery cell is disposed in the second receiving space and supported by the support. A first protrusion is formed on the wall of the housing, and the support is connected to the first protrusion. This battery device has high assembly efficiency.

[0081] In this battery device, a support bracket is positioned between the first and second battery cells, supporting the second battery cell. The bracket is connected to a first protrusion. During the assembly of the battery device, the first battery cell can be assembled to the first bottom wall simultaneously, as can the second battery cell be assembled to the support bracket, saving assembly time and improving assembly efficiency. Furthermore, the first protrusion is formed in the wall of the housing, and the support bracket is connected to the first protrusion. The structure after the support bracket and the first protrusion are assembled has high assembly strength, resulting in high reliability of the battery device.

[0082] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery device disclosed in this application.

[0083] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0084] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0085] Please refer to Figure 1, which is a schematic diagram of the vehicle structure provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0086] The vehicle 1000 may also 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, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0087] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0088] Please refer to Figures 2 to 5. Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application. Figure 3 is a schematic diagram of a first battery cell and a second battery cell provided in some embodiments of this application. Figure 4 is a cross-sectional view of a portion of the structure of a battery device provided in some embodiments of this application. Figure 5 is a cross-sectional view of a battery device provided in some embodiments of this application. This application provides a battery device 100, which includes a first battery cell 11, a second battery cell 21, a housing 30, and a support 40. The support 40 is disposed within the housing 30, dividing the internal space of the housing 30 into a first receiving space 30c and a second receiving space 30d located on both sides of the support 40. The first battery cell 11 is disposed in the first receiving space 30c and supported by the housing 30. The second battery cell 21 is disposed in the second receiving space 30d and supported by the support 40. A first protrusion 33 is formed on the wall of the housing 30, and the support 40 is connected to the first protrusion 33.

[0089] The housing 30 is used to provide space for the first battery cell 11 and the second battery cell 21.

[0090] The bracket 40 cooperates with the housing 30 to divide the interior of the housing 30 into a first accommodating space 30c and a second accommodating space 30d. The first accommodating space 30c is used to accommodate the first battery cell 11, and the second accommodating space 30d is used to accommodate the second battery cell 21.

[0091] In some embodiments, the first accommodating space 30c and the second accommodating space 30d may be distributed along the 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.

[0092] 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 can have the same structure to facilitate processing and manufacturing.

[0093] The first battery cell 11 is supported by the housing, for example, the first battery cell 11 is supported by the wall of the housing 30 that forms the first receiving space 30c.

[0094] The second battery cell 21 is supported by the bracket 40, for example, the second battery cell 21 is supported by the portion of the bracket 40 that forms the second receiving space 30d.

[0095] The first protrusion 33 is formed on the wall of the housing 30. The first protrusion 33 can be formed on the inner surface of the wall of the housing 30 or on the outer surface of the wall of the housing 30. The inner surface of the wall of the housing 30 refers to the surface of the wall that forms the interior of the housing 30, and the outer surface of the wall of the housing 30 refers to the surface of the wall that faces away from the interior of the housing 30. The first protrusion 33 is integrally formed with the wall of the housing 30 to ensure high strength at the connection between the first protrusion 33 and the wall of the housing 30, thereby improving the assembly strength between the bracket 40 and the first protrusion 33.

[0096] The second battery cell 21 can be integrated into the bracket 40. During the assembly process of the battery device 100, the first battery cell 11 can be assembled with the housing 30 and the second battery cell 21 can be assembled with the bracket 40 simultaneously. Then the bracket 40 can be connected to the first protrusion 33 to save assembly time and improve assembly efficiency.

[0097] The number of first battery cells 11 can be multiple, and the multiple first battery cells 11 can be connected in series, in parallel or in a mixed manner. Mixed connection means that the multiple first battery cells 11 are connected in both series and parallel.

[0098] The number of second battery cells 21 can be multiple, and the multiple second battery cells 21 can be connected in series, in parallel or in a mixed manner. A mixed connection means that the multiple second battery cells 21 are connected in both series and parallel.

[0099] The first battery cell 11 and the second battery cell 21 can be a secondary battery or a primary battery; 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 to these.

[0100] According to the battery device 100 of this application embodiment, the second battery cell 21 can be integrated into the bracket 40. The bracket 40 is connected to the first protrusion 33, which allows for the simultaneous assembly of the first battery cell 11 with the first bottom wall 31 and the second battery cell 21 with the bracket 40, saving assembly time and improving battery assembly efficiency. Meanwhile, the first protrusion 33 is formed on the wall of the housing 30, and the bracket 40 is connected to the first protrusion 33. The structure after the bracket 40 and the first protrusion 33 are assembled has high assembly strength, making the battery device 100 highly reliable.

[0101] Referring to Figure 5, according to some embodiments of this application, the housing 30 includes a first housing 30a and a second housing 30b disposed opposite to each other along a first direction Z. The first housing 30a and the second housing 30b are fastened together. A first protrusion 33 is formed on the first housing 30a. The first housing 30a and the support 40 form a first receiving space 30c, and the second housing 30b and the support 40 form a second receiving space 30d.

[0102] The first housing 30a and the second housing 30b are arranged opposite 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.

[0103] The first box 30a and the second box 30b can be two components with the same structure, or the first box 30a and the second box 30b can be two components with different structures.

[0104] In some embodiments, the first housing 30a can be a lower housing, and the second housing 30b can be a housing cover. For example, after the first battery cell 11 and the second battery cell 21 are respectively assembled with the first housing 30a, the second housing 30b cooperates with the first housing 30a to accommodate the first battery cell 11 and the second battery cell 21 in the accommodating space.

[0105] In the above scheme, the first housing 30a and the second housing 30b are fastened together, and the first protrusion 33 is formed on the first housing 30a to facilitate the assembly of the first battery cell 11 and the second battery cell 21 with the housing 30.

[0106] Please refer to Figures 4 and 5, and further refer to Figure 6, which is a schematic diagram of the structure of the first housing provided in some embodiments of this application. According to some embodiments of this application, the first housing 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, and a first protrusion 33 is disposed at one end of the first side wall 32 opposite to the first bottom wall 31.

[0107] One end of the first sidewall 32 is connected to the first bottom wall 31, and the other end of the first sidewall 32 forms an opening. The second box 30b is fastened to the first box 30a and covers the opening.

[0108] 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.

[0109] 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 connection 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 forms the first receiving space 30c.

[0110] In the above scheme, the first bottom wall 31 supports the first battery cell 11, which facilitates the assembly and positioning of the first battery cell 11. The first protrusion 33 is disposed at the end of the first side wall 32 opposite to the first bottom wall 31, which facilitates the assembly of the bracket 40 and the first protrusion 33 and reduces the interference of the first protrusion 33 and the bracket 40 on the first battery cell 11.

[0111] Please refer to Figures 4 and 6. According to some embodiments of this application, the first sidewall 32 includes two first sub-sidewalls 321 disposed opposite to each other 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.

[0112] The first sub-sidewall 321 and the second sub-sidewall are two walls 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.

[0113] In the second direction Y, the first battery cell 11 is disposed between two first sub-sidewalls 321, which protect the first battery cell 11 and reduce the risk of damage to the first sub-sidewalls 321.

[0114] The first protrusion 33 is formed on the inner surface of the first sub-sidewall 321. The first protrusion 33 is distributed at both ends of the bracket 40 in the second direction Y so that the two ends of the bracket 40 in the second direction Y can be connected to the first sidewall 32 and the bracket 40 is stably connected to the first sidewall 32.

[0115] Please refer to Figure 6. According to some embodiments of this application, the first protrusion 33 extends along a third direction X, and the third direction X, the second direction Y, and the first direction Z are perpendicular to each other.

[0116] The first protrusion 33 extends along the third direction X, and the length direction of the first protrusion 33 can be parallel to the third direction X.

[0117] In some embodiments, on the same first sub-sidewall 321, there may be one first protrusion 33, and the first protrusion 33 has a large connection size with the bracket 40; or, on the same first sub-sidewall 321, there may be multiple first protrusions 33, and multiple first protrusions 33 are spaced apart along the third direction X on the inner surface of the first sidewall 32, and the multiple first protrusions 33 have a large connection area with the bracket 40.

[0118] In the above scheme, the first protrusion 33 has a larger size in the third direction X, so that the bracket 40 and the first protrusion 33 have a larger connection area in the third direction X, and the connection between the bracket 40 and the first protrusion 33 is stable.

[0119] Referring to Figures 3, 5, and 6, according to some embodiments of this application, the first sidewall 32 includes two second sub-sidewalls 322 disposed opposite to each other along a third direction X; the first housing 30a also includes a first beam 34 and a second beam 35 disposed at intervals along a third direction X, the first beam 34 and the second beam 35 being connected to the first bottom wall 31, the first beam 34 and the second beam 35 being located between the two second sub-sidewalls 322, the first battery cell 11 being located between the first beam 34 and the second beam 35, and the third direction X being perpendicular to the first direction Z.

[0120] 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. In 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 form a first receiving space 30c, and the first battery cell 11 is received in the first receiving space 30c.

[0121] 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.

[0122] 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 first beam 34 and the first bottom wall 31 are firmly connected, and the second beam 35 and the first bottom wall 31 are firmly connected.

[0123] In the above scheme, the bracket 40, the first beam 34, the second beam 35, the first bottom wall 31 and the two first sub-side walls 321 form a first receiving space 30c for accommodating the first battery cell 11. At the same time, the first beam 34 and the second beam 35 cooperate with the first battery cell 11 to protect the first battery cell 11 in the third direction X and reduce the risk of damage to the first battery cell 11.

[0124] According to some embodiments of this application, cavities are formed inside both the first beam 34 and the second beam 35.

[0125] The first beam 34 and the second beam 35 can be manufactured by extrusion molding.

[0126] The interior of the first beam 34 and the interior of the second beam 35 may be reinforced with ribs to give the first beam 34 and the second beam 35 high strength.

[0127] In the above scheme, cavities are formed inside the first beam 34 and the second beam 35. The first beam 34 and the second beam 35 can be expansion beams to absorb the force of the first battery cell 11 in the third direction X.

[0128] Referring to Figures 3 and 5, according to some embodiments of this application, there are multiple first battery cells 11, and the multiple first battery cells 11 are stacked along a third direction X; the battery device 100 also includes a first restraint member 80, which extends along a third direction X, is located on the side of the first battery cell 11 away from the first bottom wall 31, is connected to the first battery cell 11, and its two ends are respectively connected to the first beam 34 and the second beam 35.

[0129] Multiple first battery cells 11 are stacked along a third direction X, and the larger surface of the first battery cell 11 can be perpendicular to the third direction X. The larger surface of the first battery cell 11 can be the surface with the larger surface area of ​​the first battery cell 11.

[0130] The first restraint member 80 can be called a pull bar. The two ends of the first restraint member 80 in the third direction X are connected to the first beam 34 and the second beam 35 respectively, which can make the first beam 34 and the second beam 35 stable connected to the first bottom wall 31, and can also limit the first battery cell 11.

[0131] The first restraint member 80 can be threadedly connected to the first beam 34 and the second beam 35. For example, the first restraint member 80 has a fifth mounting hole at each end 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 passes through the fifth mounting hole and the sixth mounting hole to lock one end of the first restraint member 80 to the first beam 34, and the third locking member passes through the fifth mounting hole and the seventh mounting hole to lock the other end of the first restraint member 80 to the second beam 35.

[0132] In some embodiments, the first restraint member 80 has a certain strength; for example, the material of the first restraint member 80 may be steel.

[0133] In some embodiments, the first restraint member 80 may include a first substrate and a first insulating layer. The substrate may be made of metal and have high strength. The first insulating layer is disposed on the surface of the first substrate, and at least a portion of the first insulating layer is disposed between the first substrate and the first battery cell 11. For example, the first insulating layer may be an insulating sleeve, which is sleeved on the outside of the first substrate.

[0134] In some embodiments, the first restraint member 80 is bonded to the first battery cell 11 with insulating adhesive, which ensures that the connection between the first restraint member 80 and the first battery cell 11 is stable, and also provides insulation between the first restraint member 80 and the first battery cell 11.

[0135] 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 force of the first battery cell 11 and constrain the expansion and deformation of the first battery cell 11.

[0136] In the above scheme, multiple first battery cells 11 are stacked along the third direction X. The two ends of the first restraint member 80 are connected to the first beam 34 and the second beam 35 respectively. The first restraint member 80 is connected to the first battery cell 11. The first restraint member 80 can constrain the first battery cell 11 to move 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 constrain the expansion deformation of the first battery cell 11 in the third direction X.

[0137] According to some embodiments of this application, there are multiple first restraint members 80, and the multiple first restraint members 80 are spaced apart along the second direction Y, with the second direction Y, the third direction X and the first direction Z being perpendicular to each other.

[0138] For example, each first battery cell 11 corresponds to two first restraint members 80, and the two first restraint members 80 are located at both ends of the first battery cell 11 in the second direction Y.

[0139] In some embodiments, the number of first restraint members 80 can be four, of which two first restraint members 80 are located at the two ends of the first beam 34 (or the second beam 35) in the second direction Y.

[0140] In the above scheme, multiple first restraint members 80 are spaced apart 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 constraining the expansion deformation of the first battery cell 11 in the third direction X.

[0141] Please refer to Figure 6, and further refer to Figures 7 and 8. Figure 7 is a structural schematic diagram of the bracket provided in some embodiments of this application, and Figure 8 is a partial enlarged view of point A in Figure 4. According to some embodiments of this application, the first protrusion 33 is provided with a first mounting hole 331, the bracket 40 is provided with a second mounting hole 41 corresponding to the first mounting hole 331, and the battery device 100 further includes a locking member 50, which passes through the second mounting hole 41 and the first mounting hole 331 to lock the bracket 40 to the first protrusion 33.

[0142] The bracket 40 can be located on the side of the first protrusion 33 opposite to the first bottom wall 31.

[0143] The locking member 50 is a component used to lock the bracket 40 to the first protrusion 33, and 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, so that the locking member 50 is threadedly engaged with the first mounting hole 331.

[0144] The second mounting hole 41 is coaxially arranged with the first mounting hole 331. The second mounting hole 41 can be a through hole provided in the bracket 40 so that the locking member 50 can pass through the second mounting hole 41 and cooperate with the first mounting hole 331.

[0145] In the above scheme, 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.

[0146] Please refer to Figure 4. According to some embodiments of this application, the bracket 40 includes a support wall 42, which is located between the first battery cell 11 and the second battery cell 21. The support wall 42 supports the second battery cell 21 and is connected to the first protrusion 33.

[0147] The support wall 42 can be a part of the bracket 40 used to support the second battery cell 21, and the support wall 42 is used to connect with the first protrusion 33.

[0148] Along the first direction Z, the support wall 42 is located between the first battery cell 11 and the second battery cell 21.

[0149] In some embodiments, the second battery cell 21 may be bonded to the surface of the support wall 42 that is opposite to the first battery cell 11.

[0150] In the above scheme, the support wall 42 is located between the first battery cell 11 and the second battery cell 21 to separate the first battery cell 11 and the second battery cell 21; the second battery cell 21 can be integrated into the support wall 42 to improve the assembly efficiency of the battery device 100.

[0151] Please refer to Figures 8 and 9. Figure 9 is a schematic diagram of the structure of the support wall provided in some embodiments of this application. According to some embodiments of this application, the support wall 42 includes a body 421 and an extension 422. The body 421 supports the second battery cell 21. The body 421 has a first surface 4211 and a second surface 4212 disposed opposite to each other along the first direction Z, and an outer peripheral surface 4213 connecting the first surface 4211 and the second surface 4212. The extension 422 protrudes from the outer peripheral surface 4213 and is connected to the first protrusion 33. The first accommodating space 30c and the second accommodating space 30d are distributed along the first direction Z.

[0152] The main body 421 is the part of the support wall 42 used to support the second battery cell 21, and the extension 422 is the part of the support wall 42 used to connect with the first protrusion 33.

[0153] The first surface 4211 and the second surface 4212 are two surfaces of the body 421 that are opposite each other in the first direction Z. The first surface 4211 can be the surface of the body facing the first bottom wall 31, and the second surface 4212 can be the surface of the body away from the first bottom wall 31.

[0154] The outer peripheral surface 4213 refers to the surface of the body 421 that connects the first surface 4211 and the second surface 4212. In some embodiments, the outer peripheral surface 4213 may be configured as the inner surface facing the first sidewall 32. The extension 422 protrudes from the outer peripheral surface 4213 to facilitate connection between the extension 422 and the first protrusion 33.

[0155] In some embodiments, both the extension 422 and the body 421 may be flat plates, and the extension 422 and the body 421 may be coplanar.

[0156] In some embodiments, referring to FIG8, the extension 422 may include a connecting portion 4221 and a transition portion 4222. The connecting portion 4221 may be arranged parallel to the body 421. The transition portion 4222 connects the body 421 and the connecting portion 4221. Furthermore, the connecting portion 4221 is closer to the first protrusion 33 relative to the body 421, and the connecting portion 4221 is connected to the first protrusion 33.

[0157] In some embodiments, the body 421 and the extension 422 are integrally formed, for example, the support wall 42 is formed by extrusion molding.

[0158] In some embodiments, the support wall 42 has a certain strength, and the material of the support wall 42 can be metal, such as aluminum or aluminum alloy.

[0159] In the above scheme, the body 421 has high strength so that the body 421 can support the second battery cell 21; the extension 422 protrudes from the outer peripheral surface 4213 of the body 421 and is connected to the first protrusion 33 so as to realize the assembly of the support wall 42 and the first protrusion 33.

[0160] Referring to Figures 3 and 7, according to some embodiments of this application, the bracket 40 further includes two second sidewalls 43 disposed opposite each other along a third direction X. The two second sidewalls 43 are connected to the support wall 42. The second battery cell 21 is disposed between the two second sidewalls 43. The third direction X is perpendicular to the first direction Z. The first accommodating space 30c and the second accommodating space 30d are distributed along the first direction Z.

[0161] The second sidewall 43 can be welded to the support wall 42 so that the second sidewall 43 and the support wall 42 are firmly connected.

[0162] The two second sidewalls 43 can be arranged parallel to each other and spaced apart in the third direction X, so that the support wall 42 and the two second sidewalls 43 can form a second chamber for accommodating the second battery cell 21.

[0163] The second sidewall 43 can cooperate with the second battery cell 21. For example, the second sidewall 43 can be attached to the second battery cell 21, or a gasket, such as a heat insulation pad or a buffer pad, can be provided between the second sidewall 43 and the second battery cell 21. The second sidewall 43 can be connected to the second battery cell 21 through the gasket.

[0164] In the above scheme, two second sidewalls 43 are connected to the support wall 42. The two second sidewalls 43 and the support wall 42 form a space for accommodating the second battery cell 21. At the same time, the second sidewalls 43 cooperate with the second battery cell 21 to protect the second battery cell 21 in the third direction X and reduce the risk of damage to the second battery cell 21.

[0165] Referring to Figures 3 and 7, according to some embodiments of this application, there are multiple second battery cells 21, and the multiple second battery cells 21 are stacked along a third direction X; the battery device 100 also includes a second restraint member 60, which extends along a third direction X, is located on the side of the second battery cell 21 away from the support wall 42, the second restraint member 60 is connected to the second battery cell 21, and the two ends of the second restraint member 60 are respectively connected to two second side walls 43.

[0166] Multiple second battery cells 21 are stacked along a third direction X, and the larger surface of the second battery cell 21 can be perpendicular to the third direction X. The larger surface of the second battery cell 21 can be the surface with the larger surface area of ​​the second battery cell 21.

[0167] The second restraint member 60 can be called a pull bar. The two ends of the second restraint member 60 in the third direction X are respectively connected to the two second side walls 43, which can make the second side walls 43 and the support wall 42 stable, and can also limit the position of the second battery cell 21.

[0168] The second restraint member 60 can be threadedly connected to the second sidewall 43. For example, the second restraint member 60 has a third mounting hole at each end in the third direction X, and the second sidewall 43 has a fourth mounting hole corresponding to the third mounting hole. The battery device 100 also includes a first locking member, which passes through the third mounting hole and the fourth mounting hole to lock the second restraint member 60 to the second sidewall 43.

[0169] In some embodiments, the second restraint member 60 has a certain strength; for example, the material of the second restraint member 60 may be steel.

[0170] In some embodiments, the second restraint member 60 may include a second substrate and a second insulating layer. The second substrate may be made of metal and have high strength. The second insulating layer is disposed on the surface of the second substrate, and at least a portion of the second insulating layer is disposed between the second substrate and the second battery cell 21. For example, the second insulating layer may be an insulating sleeve, which is sleeved on the outside of the second substrate.

[0171] In some embodiments, the second restraint member 60 is bonded to the second battery cell 21 with insulating adhesive, which provides insulation and isolation between the second restraint member 60 and the second battery cell 21 while ensuring a stable connection between them.

[0172] In some embodiments, the second sidewall 43 can be an expansion beam, which can absorb the force of the second battery cell 21 when the second battery cell 21 expands and deforms, and constrain the expansion and deformation of the second battery cell 21.

[0173] In the above scheme, multiple second battery cells 21 are stacked along the third direction X. The two ends of the second restraint member 60 are respectively connected to the two second sidewalls 43, and the second restraint member 60 is connected to the second battery cells 21. The second restraint member 60 can constrain the second battery cells 21 to move 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 constrain the expansion deformation of the second battery cells 21 in the third direction X.

[0174] According to some embodiments of this application, the number of second restraint members 60 can be multiple, and the multiple second restraint members 60 are spaced apart along the second direction Y, with the second direction Y, the third direction X and the first direction Z being perpendicular to each other.

[0175] For example, each second battery cell 21 corresponds to two second restraint members 60, and the two second restraint members 60 are located at both ends of the second battery cell 21 in the second direction Y.

[0176] In some embodiments, the number of second restraint members 60 may be four, and of the four second restraint members 60, two second restraint members 60 are respectively located at both ends of the second sidewall 43 in the second direction Y.

[0177] In the above scheme, multiple second restraint members 60 are spaced apart along the second direction Y, which can connect the two second sidewalls 43 at multiple positions in the second direction Y, further restricting the movement of the second battery cell 21 in the direction away from the support wall 42, and further constraining the expansion deformation of the second battery cell 21 in the third direction X.

[0178] Please refer to Figure 7. According to some embodiments of this application, a cavity is formed inside the second sidewall 43.

[0179] The second sidewall 43 can be a hollow structure, and the second sidewall 43 can be processed by extrusion molding.

[0180] The interior of the second sidewall 43 may be reinforced with ribs to give the second sidewall 43 higher strength.

[0181] In the above scheme, a cavity is formed inside the second sidewall 43, and the second sidewall 43 can be an expansion beam to absorb the force of the second battery cell 21 in the third direction X.

[0182] Referring to Figure 4, according to some embodiments of this application, the housing 30 includes a first bottom wall 31, which supports the first battery cell 11. A first flow channel 311 is formed inside the first bottom wall 31 for containing a heat exchange medium. A second flow channel 44 is formed inside the support 40 for containing a heat exchange medium.

[0183] The first flow channel 311 is formed inside the first bottom wall 31 and serves as a channel for the flow of the heat exchange medium. After the battery device 100 is assembled, the first flow channel 311 can contain the heat exchange medium to facilitate 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 transferred to the first battery cell 11 through the first bottom wall 31, which can reduce the temperature of the first battery cell 11. As another example, when the heat exchange medium is a heating medium, the high temperature of the heat exchange medium is transferred to the first battery cell 11 through the first bottom wall 31, which can increase the temperature of the first battery cell 11.

[0184] In some embodiments, the first bottom wall 31 may have good thermal conductivity to facilitate heat exchange between the heat exchange medium and the first battery cell 11.

[0185] The second flow channel 44 is formed inside the support 40 and serves as a channel for the flow of the heat exchange medium. After the battery device 100 is assembled, the second flow channel 44 can contain the heat exchange medium to facilitate heat exchange between the support 40 and the second battery cell 21. For example, when the heat exchange medium is a cooling medium, the low temperature of the heat exchange medium is transferred to the second battery cell 21 through the support 40, thereby reducing the temperature of the second battery cell 21. Alternatively, when the heat exchange medium is a heating medium, the high temperature of the heat exchange medium is transferred to the second battery cell 21 through the support 40, thereby increasing the temperature of the second battery cell 21.

[0186] In some embodiments, the support 40 may have good thermal conductivity so that the heat exchange medium can exchange heat with the second battery cell 21 through the support 40.

[0187] Meanwhile, 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.

[0188] In some embodiments, the heat exchange medium is a fluid, which may be, but is not limited to, water, alcohol or other liquid mixtures.

[0189] In the above scheme, the first flow channel 311 contains the heat exchange medium so that the first bottom wall 31 can exchange heat with the first battery cell 11 and regulate the temperature of the first battery cell 11; the second flow channel 44 contains the heat exchange medium so that the support 40 can exchange heat with the second battery cell 21 and regulate the temperature of the second battery cell 21. At the same time, since the support 40 is located between the second battery cell 21 and the first battery cell 11, the support 40 can also exchange heat with the first battery cell 11 and regulate the temperature of the first battery cell 11.

[0190] Please refer to Figure 4, and further refer to Figures 10 and 11. Figure 10 is a partial structural schematic diagram of the battery device provided in some embodiments of this application, and Figure 11 is a partial enlarged view of section B in Figure 10. According to some embodiments of this 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 are connected to 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 are connected to the liquid outlet main pipe 76.

[0191] 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 via a tee pipe, so that the heat exchange medium transported by the liquid inlet main pipe 73 can enter the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 respectively.

[0192] The first bottom wall 31 may have 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 that the first liquid inlet branch pipe 71 communicates with the first flow channel 311. The first liquid inlet branch pipe 71 is sealed to the first bottom wall 31 to reduce the risk of heat exchange medium leakage from the connection between the first liquid inlet branch pipe 71 and the first bottom wall 31.

[0193] The support 40 may have a second opening communicating with the second flow channel 44, and the second liquid inlet branch pipe 72 is connected to the second opening to facilitate communication between the second liquid inlet branch pipe 72 and the second flow channel 44. The second liquid inlet branch pipe 72 is sealed to the support 40 to reduce the risk of heat exchange medium leakage from the connection between the second liquid inlet branch pipe 72 and the support 40.

[0194] 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 via a tee pipe so that the heat exchange medium transported by the first liquid outlet branch pipe 74 and the second liquid outlet branch pipe 75 can be discharged through the liquid outlet main pipe 76.

[0195] The first bottom wall 31 may have a third opening communicating with the first flow channel 311. The first liquid outlet branch pipe 74 is connected to the third opening so that the first liquid outlet branch pipe 74 communicates with the first flow channel 311. The first liquid outlet branch pipe 74 is sealed to the first bottom wall 31 to reduce the risk of heat exchange medium leakage from the connection between the first liquid outlet branch pipe 74 and the first bottom wall 31.

[0196] The support 40 may have a fourth opening communicating with the second flow channel 44, and the second liquid outlet branch pipe 75 is connected to the fourth opening to facilitate communication between the second liquid outlet branch pipe 75 and the second flow channel 44. The second liquid outlet branch pipe 75 is sealed to the support 40 to reduce the risk of heat exchange medium leakage from the connection between the second liquid outlet branch pipe 75 and the support 40.

[0197] 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 support 40, and the heat exchange medium circulates in the second flow channel 44.

[0198] In some embodiments, the inlet manifold 73 and the outlet manifold 76 are respectively connected to an external container, which contains the heat exchange medium. The external container can be a container for the heat exchange medium of an electrical device.

[0199] In some embodiments, the housing 30 is provided with a first pipe joint connected to the inlet manifold 73 and a second pipe joint connected to the outlet manifold 76. The first pipe joint is used to connect to an external container through the first pipe, and the second pipe joint is used to connect to an external container through the second pipe.

[0200] In some embodiments, the first inlet branch pipe 71 may be connected in parallel with the second inlet branch pipe 72, and the first outlet branch pipe 74 may be connected in parallel with the second outlet branch pipe 75.

[0201] In the above scheme, the first liquid inlet branch pipe 71 and the second liquid inlet branch pipe 72 are respectively connected to the liquid inlet main pipe 73 so as to transport 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 connected to 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.

[0202] Referring to Figures 6 and 11, in some embodiments, when the housing 30 includes two second sub-side walls, the two second sub-side walls are disposed at both ends of the first bottom wall 31 in the third direction X. The first beam and the second beam are disposed between the two second sub-side walls. Along the third direction X, an electrical chamber for accommodating electrical components (such as high-voltage boxes, battery management units, 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 disposed in the electrical chamber.

[0203] According to some embodiments of this application, this application also provides an electrical device that includes a battery device 100 provided according to any of the above embodiments.

[0204] The battery device 100 is used to provide electrical energy.

[0205] According to some embodiments of this application, please refer to Figures 2 to 11. This application provides a battery device 100, which includes a first housing 30a, a second housing 30b, a first battery cell 11, a second battery cell 21, and a bracket 40.

[0206] The first housing 30a and the second housing 30b are arranged opposite each other along the first direction. The first housing 30a and the second housing 30b are fastened together. The bracket 40 is disposed inside the housing 30. The first housing 30a and the bracket 40 form a first accommodating space 30c. The second housing 30b and the bracket 40 form a second accommodating space 30d. The first battery cell 11 is accommodated in the first accommodating space 30c. The second battery cell 21 is accommodated in the second accommodating space 30d. The first accommodating space 30c and the second accommodating space 30d are distributed along the first direction Z.

[0207] Along the first direction Z, the bracket 40 is disposed between the first battery cell 11 and the second battery cell 21.

[0208] The first housing 30a includes a first bottom wall 31 and a first side wall 32. The first side wall 32 surrounds the first bottom wall 31, and 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 each other along a second direction Y. The first battery cell 11 is disposed between the two first sub-side walls 321. A first protrusion 33 is formed on the inner surface of the first sub-side wall 321. A bracket 40 is located on the side of the first protrusion 33 opposite to the first bottom wall 31. The two ends of the bracket 40 in the second direction Y are respectively connected to the first protrusion 33 on the two first sub-side walls 321. The first protrusion 33 extends along a third direction X, and the bracket 40 is locked to the first protrusion 33 by a locking member 50.

[0209] According to the battery device 100 of this application embodiment, 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 to the first bottom wall 31 and the assembly of the second battery cell 21 to the bracket 40 can be carried out simultaneously, saving assembly time and improving assembly efficiency. At the same time, the bracket 40 is connected to the first protrusion 33, which is formed on the inner surface of the first sub-side wall 321, so that the bracket 40 and the first protrusion 33 have high assembly efficiency and improve the reliability of the battery device 100.

[0210] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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 by, The battery device comprises: a box body; a support arranged in the box body, which divides the internal space of the box body into a first accommodating space and a second accommodating space on both sides of the support; a first battery cell arranged in the first accommodating space and supported by the box body, and a second battery cell arranged in the second accommodating space and supported by the support; wherein a wall of the box body is formed with a first protrusion, and the support is connected to the first protrusion.

2. The battery device according to claim 1, characterized by The box body comprises a first box body and a second box body arranged opposite along a first direction, the first box body and the second box body are buckled, the first protrusion is formed on the first box body, the first box body and the support form the first accommodating space, and the second box body and the support form the second accommodating space.

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

4. The battery device of claim 3, wherein The first side wall comprises two first sub-side walls arranged opposite 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 of claim 4, wherein, The first protrusion extends along a third direction, the third direction, the second direction and the first direction are perpendicular to each other.

6. The battery device according to any one of claims 3 to 5, characterized by, The first side wall comprises two second sub-side walls arranged opposite along a third direction. The first box body further comprises 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 of claim 6, wherein The inner part of the first beam and the inner part of the second beam are both formed with cavities.

8. The battery device according to claim 6 or 7, characterized by The number of the first battery cells is multiple, and the multiple first battery cells are arranged in layers along the third direction. The battery device further comprises a first restraint member extending along the third direction, the first restraint member is located on the side of the first battery cell away from the first bottom wall, the first restraint member is connected with the first battery cell, and the two ends of the first restraint member are connected to the first beam and the second beam respectively.

9. The battery device of claim 8, wherein, The number of the first restraint members is multiple, and the multiple first restraint members are arranged at intervals along a second direction, the second direction, the third direction and the first direction are perpendicular to each other.

10. The battery device according to any one of claims 1 to 9, characterized by, The first protrusion is provided with a first mounting hole, the support is provided with a second mounting hole corresponding to the first mounting hole, and the battery device further comprises a locking member penetrating the second mounting hole and the first mounting hole to lock the support on the first protrusion.

11. The battery device according to any one of claims 1 to 10, wherein The support comprises a support wall 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 of claim 11, wherein, The support wall comprises a body and an extension, the body supports the second battery monomer, the body has a first surface and a second surface oppositely arranged along a first direction, and a peripheral surface connecting the first surface and the second surface, the extension protrudes from the peripheral surface and is connected with the first protrusion, the first accommodating space and the second accommodating space are distributed along the first direction.

13. The battery device according to claim 11 or 12, characterized by The bracket further comprises two second side walls oppositely arranged along a third direction, the two second side walls are connected to the support wall, the second battery monomer 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 of claim 13, wherein, The number of the second battery monomers is multiple, and the multiple second battery monomers are arranged in layers along the third direction. The battery device further comprises a second binding member, the second binding member extends along the third direction, the second binding member is located on a side of the second battery monomer away from the support wall, the second binding member connects the second battery monomer, and two ends of the second binding member are connected with the two second side walls respectively.

15. The battery device of claim 14, wherein, The number of the second binding members is multiple, and the multiple second binding members are arranged at intervals along a second direction, the second direction, the third direction and the first direction are perpendicular to each other in pairs.

16. The battery device according to any one of claims 13 to 15, characterized by, The second side wall is internally formed with a cavity.

17. The battery device of any one of claims 1 to 16, wherein, The box comprises a first bottom wall, the first bottom wall supports the first battery monomer, and the first bottom wall is internally formed with a first flow channel for accommodating a heat exchange medium. The bracket is internally formed with a second flow channel for accommodating a heat exchange medium.

18. The battery device of claim 17, wherein, The battery device further comprises 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 with the first bottom wall and communicates with the first flow channel, the second liquid inlet branch pipe is connected with the bracket and communicates with the second flow channel, and the first liquid inlet branch pipe and the second liquid inlet branch pipe both communicate with the liquid inlet main pipe; and / or, The battery device further comprises 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 with the first bottom wall and communicates with the first flow channel, the second liquid outlet branch pipe is connected with the bracket and communicates with the second flow channel, and the first liquid outlet branch pipe and the second liquid outlet branch pipe both communicate with the liquid outlet main pipe.

19. An electrical device, characterized by The battery device comprises the battery device according to any one of claims 1 to 18.

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