Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. The battery device comprises a battery box body, a confluence piece and a plurality of single batteries, a containing cavity is formed in the battery box body, a supporting beam is arranged on at least one side of the containing cavity in the first direction, the single batteries are arranged in the containing cavity, and at least two single batteries are arranged in the second direction; the two battery monomers arranged in the second direction are electrically connected through a confluence piece, a mounting groove is formed in one side of the supporting beam in the third direction, and at least part of the confluence piece is configured to be inserted into the mounting groove in the third direction; wherein a plurality of cavities are formed in the supporting beam, at least part of the cavities form mounting grooves in a cutting mode, the first direction intersects with the second direction, and the plane where the first direction and the second direction are located is perpendicular to the third direction. According to the battery device provided by the invention, the space occupied by the bus piece can be reduced, and the battery device can be conveniently assembled.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly relates to a battery device and an electrical equipment. Background Art

[0002] With the continuous development of the new energy industry, lithium batteries are being increasingly used in various industries as energy storage units. Due to the differences in the equipment layout spaces of different industries, when designing the battery box, industry designers divide the entire battery box into several battery modules for series and parallel connection, and the multiple battery modules need to be connected through busbars to output the currents of each module in series and parallel.

[0003] However, the presence of the busbars occupies a part of the internal space of the battery box, resulting in an increase in the size of the battery box and affecting the normal assembly of the battery box. Summary of the Utility Model

[0004] In view of the defects existing in the prior art, the purpose of this application is to provide a battery device and an electrical equipment, which can effectively solve the problem that the busbars occupy the internal space of the battery box.

[0005] In a first aspect, this application provides a battery device, including:

[0006] A battery box, an accommodation cavity is formed inside the battery box, and support beams are provided on at least one side of the accommodation cavity along a first direction;

[0007] Multiple battery cells, the multiple battery cells are arranged in the accommodation cavity, and at least two battery cells are arranged in a row along a second direction;

[0008] Busbars, two battery cells arranged in a row along the second direction are electrically connected through the busbars, an installation groove is formed on one side of the support beam along a third direction, and at least part of the busbars are configured to be inserted into the installation groove along the third direction;

[0009] Wherein, a plurality of cavities are formed inside the support beam, at least part of the cavities are formed into installation grooves by cutting, the first direction intersects with the second direction, and the plane where the first direction and the second direction are located together is perpendicular to the third direction.

[0010] For the battery device according to the present application, by forming an installation groove on one side of the support beam along the third direction, the bus bar can be inserted into the installation groove along the third direction, thereby reducing the space occupied by the bus bar along the first direction and the second direction, and further reducing the dimensions of the battery box along the first direction and the second direction, which is convenient for assembling the battery device. At the same time, by forming a plurality of cavities inside the support beam, the side walls of the corresponding parts of the cavities at the corresponding positions can be cut according to the installation position of the bus bar, so as to facilitate the formation of the installation groove, and the uncut cavities still have sufficient support strength, thereby improving the support strength of the support beam after cutting. In some embodiments of the present application, the plurality of cavities include a first cavity and a second cavity arranged on both sides of the support beam along the first direction, and the plurality of cavities further include a third cavity arranged between the first cavity and the second cavity along the first direction, and at least part of the installation groove is formed by cutting part of the third cavity.

[0011] At least part of the installation groove is formed by cutting part of the third cavity arranged between the first cavity and the second cavity, which is convenient for forming the installation groove. At the same time, the uncut first cavity and second cavity still have sufficient support strength, thereby improving the support strength of the support beam after cutting.

[0012] In some embodiments of the present application, the second cavity is arranged on the side of the first cavity facing the battery cell along the first direction, and part of the second cavity is formed into part of the installation groove by cutting.

[0013] Part of the installation groove is formed by cutting the second cavity close to the battery cell. After the bus bar is inserted into the installation groove, it can be arranged close to the battery cell, thereby reducing the size of the bus bar along the first direction, facilitating the electrical connection between the bus bar and the battery cell, and reducing the occurrence of short-circuit phenomena between the bus bar and other components of the battery device.

[0014] In some embodiments of the present application, the battery device further includes a pressing member, the pressing member is arranged on one side of the battery cell along the third direction and between two adjacent battery cells along the second direction, one end of the pressing member along the first direction is connected to the support beam, and is configured to limit the position of the battery cell along the third direction.

[0015] By being connected to the support beam, the pressing member can limit the position of the battery cell along the third direction, thereby reducing the displacement of the battery cell along the third direction.

[0016] In some embodiments of the present application, the support beam includes a main body portion. The main body portion forms a mounting groove by cutting. The mounting groove includes a first groove portion and a second groove portion. A part of the third cavity forms the first groove portion by cutting, and a part of the second cavity forms the second groove portion by cutting. A second groove portion is respectively provided at both ends of the first groove portion along the first direction. The support beam further includes a fixing portion disposed between the two second groove portions, and the press-fitting member is connected to the fixing portion.

[0017] By providing a fixing portion between the two second groove portions, the press-fitting member can be connected to the fixing portion, so as to connect the press-fitting member to the support beam, and limit the position of the battery cell along the third direction through the press-fitting member.

[0018] In some embodiments of the present application, the battery device further includes a mounting member and a connecting member. At least part of the mounting member is disposed on the side of the fixing portion facing the press-fitting member along the third direction. The connecting member sequentially passes through the press-fitting member and the mounting member along the third direction and is connected to the mounting member.

[0019] Since the fixing portion also has a cavity inside and is not convenient to be directly connected to the connecting member, a mounting member is provided on the side of the fixing portion facing the press-fitting member along the third direction. The connecting member sequentially passes through the press-fitting member and the mounting member along the third direction and is connected to the mounting member, thereby improving the connection strength between the connecting member and the fixing portion.

[0020] In some embodiments of the present application, the first cavity of the main body portion communicates with the accommodating cavity, and blocking members are respectively provided in the second cavity and the third cavity of the main body portion.

[0021] When the internal pressure of the battery cell increases and the pressure relief device is opened, the high-temperature gas inside the battery cell can be discharged into the accommodating cavity through the pressure relief device. By connecting the first cavity with the accommodating cavity, the high-temperature gas in the accommodating cavity can flow into the first cavity and be discharged to the outside of the battery device through the first cavity. And blocking members are respectively provided in the second cavity and the third cavity, which can reduce the high-temperature gas in the accommodating cavity from flowing into the second cavity and the third cavity, and reduce the high-temperature gas from flowing out through the second cavity and the third cavity and acting on the bus bar, thereby reducing the damage of the high-temperature gas to the bus bar.

[0022] In some embodiments of the present application, a partition is provided inside at least one cavity, and the partition is configured to divide the inside of the cavity into a plurality of cavities along the third direction.

[0023] By providing a partition in the cavity, the partition at the corresponding position can be cut according to the size of the bus bar along the third direction, so as to facilitate the formation of the mounting groove, and the uncut partition can improve the support strength of the support beam.

[0024] In some embodiments of the present application, the battery device further includes a connecting harness electrically connected to the battery cell, and at least a portion of the connecting harness is configured to be inserted into the mounting slot along a third direction.

[0025] By configuring at least part of the connecting wiring harness to be inserted into the installation slot along the third direction, the connecting wiring harness is facilitated to be installed, and the space occupied by the connecting wiring harness along the first direction and the second direction can be reduced, thereby reducing the size of the battery box along the first direction and the second direction, thereby facilitating the assembly of the battery device.

[0026] In some embodiments of the present application, the busbar includes a first conductive part and a second conductive part, and a second conductive part is respectively provided at both ends of the first conductive part along the second direction. The first conductive part is inserted into the installation groove, and the two second conductive parts are respectively arranged on one side of the support beam along the third direction, and are electrically connected one by one to the two battery cells arranged along the second direction.

[0027] By inserting the first conductive part into the installation groove, the space occupied by the busbar along the first direction and the second direction can be reduced, thereby reducing the size of the battery box along the first direction and the second direction, making it easier to assemble the battery device. At the same time, by arranging the two second conductive parts on one side of the support beam along the third direction respectively, and electrically connecting them one by one with the two battery cells arranged along the second direction, it is convenient to connect the two battery cells arranged along the second direction through the busbar.

[0028] In some embodiments of the present application, the first conductive portion includes a first plate portion and a second plate portion, the first plate portion is arranged on the side of the second plate portion away from the battery cell along the first direction, and a second plate portion is correspondingly provided at each end of the first plate portion along the second direction, and the two second conductive portions are respectively connected to the two second plate portions one by one.

[0029] By arranging the first plate portion along the first direction on the side of the second plate portion away from the battery cell, it is convenient to arrange the support structure at the position of the support beam corresponding to the first plate portion, thereby improving the support strength of the support beam.

[0030] In some embodiments of the present application, a buffer is provided on a side of the first plate portion facing the battery cell along the first direction; and / or a buffer is provided on a side of the first plate portion facing away from the battery cell along the first direction.

[0031] By providing a buffer member on the side of the first plate portion facing the battery cell along the first direction, and / or providing a buffer member on the side of the first plate portion facing away from the battery cell along the first direction, the impact force received when a collision occurs between the first plate portion and the inner wall surface of the mounting groove can be reduced, thereby reducing damage to the busbar.

[0032] In some embodiments of the present application, the outer surface of the first conductive portion is coated with an insulating layer.

[0033] By coating the outer surface of the first conductive portion with an insulating layer, the occurrence of a short - circuit phenomenon between the bus bar and the support beam or other components within the battery box can be reduced.

[0034] In a second aspect, the present application provides an electrical device, which has the battery device of any one of the above.

[0035] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically gives the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0037] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0038] Figure 2 is a schematic structural diagram of a battery cell assembly provided by an embodiment of the present application;

[0039] Figure 3 is an exploded structural diagram of a battery cell provided by an embodiment of the present application;

[0040] Figure 4 is a schematic structural diagram of a battery device provided by an embodiment of the present application;

[0041] Figure 5 is Figure 4 the internal structural diagram of the battery device in [[ ]] after removing the cover plate;

[0042] Figure 6 is Figure 5 the structural diagram of the battery box in [[ ]];

[0043] Figure 7 is Figure 5 the enlarged structural diagram of part A in [[ ]];

[0044] Figure 8 is Figure 5 the partial assembled structural diagram of the support beam and the battery cell assembly in [[ ]];

[0045] Figure 9 is Figure 8 the schematic cross-sectional structure diagram of B-B in

[0046] Figure 10 is Figure 8 the schematic cross-sectional structure diagram of C-C in

[0047] Figure 11 is Figure 7 the schematic structure diagram of the bus bar in

[0048] The reference numerals in the specific embodiments are as follows:

[0049] 1. Vehicle;

[0050] 10. Battery device; 11. Controller; 12. Motor;

[0051] 20. Battery cell assembly; 21. Battery cell; 211. End cap; 212. Housing; 213. Electrode assembly; 214. Electrode terminal; 215. Positioning post;

[0052] 30. Battery box; 31. Box body; 311. Accommodation cavity; 312. Support beam; 3121. Installation groove; 31211. First groove part; 31212. Second groove part; 3122. First cavity; 3123. Second cavity; 3124. Third cavity; 3125. Main body part; 3126. Fixed part; 3127. Partition; 3128. Sealing member; 313. Side beam; 32. Cover plate;

[0053] 40. Bus bar; 41. First conductive part; 411. First plate part; 412. Second plate part; 413. Third plate part; 414. Buffer member; 42. Second conductive part; 421. Connection part; 422. First positioning hole; 423. Second positioning hole;

[0054] 50. Pressing part;

[0055] 60. Mounting part; 61. Threaded hole;

[0056] 70. Connecting part;

[0057] X. First direction; Y. Second direction; Z. Third direction. Specific embodiments

[0058] The following will describe in detail the implementation manners of the technical solutions of the present application in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0059] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of this application should have the ordinary meanings understood by those skilled in the art to which the embodiments of this application belong.

[0060] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0061] In addition, technical terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is including two or more, unless otherwise clearly and specifically defined.

[0062] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific situations.

[0063] In the description of the embodiments of this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0064] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as military equipment and aerospace. Lithium batteries have been widely used in mobile and portable electrical appliances due to their advantages such as high energy density, high average open-circuit voltage, and long cycle life.

[0065] With the continuous development of the new energy industry, lithium batteries are being continuously used by various industries as energy storage units. Due to the differences in the equipment layout spaces of different industries, when industry designers design battery boxes, the entire battery box is divided into several battery modules for series and parallel connection, and multiple battery modules need to be connected through busbars to output the currents of each module in series and parallel.

[0066] However, the existence of busbars occupies a part of the internal space of the battery box, resulting in an increase in the size of the battery box and affecting the normal assembly of the battery box.

[0067] To solve the problem of busbars occupying the internal space of the battery box, this application proposes a battery device and an electrical device having the battery device, which can reduce the occupied space of the busbars in the battery box, thereby reducing the size of the battery box and facilitating the assembly of the battery device.

[0068] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through busbar components.

[0069] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by tying a plurality of battery cells with cable ties.

[0070] In some embodiments, the battery device may be a battery pack, and the battery pack includes a battery box and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the battery box.

[0071] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the battery box by fixing the battery module in the box.

[0072] As an example, the battery cell assembly may also be accommodated in the battery box by directly fixing a plurality of battery cells to the battery box.

[0073] As an example, the battery box body may include a first box body and a second box body. The first box body and the second box body are buckled together so that a closed space is formed inside the battery box body to accommodate the battery cell assembly. The "closed" here means covering or closing, which can be sealed or unsealed. The first box body can be a top cover or a bottom plate.

[0074] As an example, the battery 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 battery box body to accommodate the battery cell assembly.

[0075] As an example, the battery box body can be part of the chassis structure of a vehicle. For example, the top cover of the battery box body can become at least part of the floor of the vehicle, or the frame of the battery box body can become at least part of the cross beams and longitudinal beams of the vehicle.

[0076] 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 battery box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0077] In some embodiments, the energy storage device includes one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery modules, and the plurality of battery modules are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0078] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption period, and provide electrical energy to relevant users or electrical equipment during the high electricity consumption period. The energy storage system provided by the embodiments of the present application can be any power system that requires an energy storage device.

[0079] The technical solutions described in the embodiments of the present application are applicable to various electrical devices and energy storage devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, spacecraft, and energy storage containers, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spaceships, etc.

[0080] Figure 1 The structural schematic diagram of vehicle 1 provided for some embodiments of the present application. As Figure 1As shown, vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 10 is provided inside vehicle 1. The battery device 10 can be arranged at the bottom, head, or tail of vehicle 1. The battery device 10 can be used to supply power to vehicle 1. For example, the battery device 10 can serve as the operating power source of vehicle 1. Vehicle 1 can also include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to supply power to the motor 12. For example, it is used for the working power requirements during the start-up, navigation, and driving of vehicle 1.

[0081] In some embodiments of the present application, the battery device 10 can not only serve as the operating power source of vehicle 1, but also serve as the driving power source of vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1.

[0082] Figure 2 It is a schematic structural diagram of a battery cell assembly 20 according to an embodiment of the present application. As Figure 2 shown, the battery device 10 can include a plurality of battery cells 21. A battery cell 21 refers to the smallest unit that makes up the battery device 10. The plurality of battery cells 21 can be connected in series and / or in parallel via electrode terminals for various applications. Among them, the plurality of battery cells 21 can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means a combination of series and parallel connections.

[0083] The battery device 10 can include a plurality of battery cell assemblies 20 and a battery box. The plurality of battery cell assemblies 20 are accommodated inside the battery box. The battery box is used to accommodate the battery cells 21 or the battery cell assemblies 20 to reduce the influence of liquid or other foreign objects on the charging or discharging of the battery cells 21. The battery box can be a simple three-dimensional structure such as a separate cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as a cuboid, cylinder, or sphere. The material of the battery box can be an alloy material such as aluminum alloy or ferroalloy, or a polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber reinforced epoxy resin.

[0084] The battery cell assembly 20 can include a plurality of battery cells 21. The plurality of battery cells 21 can first be connected in series, in parallel, or in a series-parallel combination to form the battery cell assembly 20, and then the plurality of battery cell assemblies 20 are connected in series, in parallel, or in a series-parallel combination to form the battery device 10. The battery cells 21 can be in the shape of a cylinder, flat body, cuboid, or other shapes, and the embodiments of the present application are not limited thereto. Generally, the battery cells 21 are divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited thereto. However, for the sake of simplicity of description, the following embodiments will take the square lithium-ion battery cells 21 as an example for illustration.

[0085] Figure 3 Exploded structural schematic diagram of battery cell 21 provided for some embodiments of the present application. The battery cell 21 refers to the smallest unit that makes up the battery device 10. For example Figure 3 , the battery cell 21 includes an end cap 211, a housing 212, and an electrode assembly 213.

[0086] The end cap 211 refers to a component that covers the opening of the housing 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the housing 212 to cooperate with the housing 212. Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 211 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 21 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 214 can be provided on the end cap 211. The electrode terminals 214 can be used to electrically connect to the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold can also be provided on the end cap 211. In some embodiments, an insulating member can also be provided on the inner side of the end cap 211. The insulating member can be used to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0087] The housing 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 21. Among them, the formed internal environment can be used to accommodate the electrode assembly 213, electrolyte (not shown in the figure), and other components. The housing 212 and the end cap 211 can be independent components. An opening can be provided on the housing 212, and the end cap 211 is covered at the opening to form the internal environment of the battery cell 21. Without limitation, the end cap 211 and the housing 212 can also be integrated. Specifically, the end cap 211 and the housing 212 can first form a common connection surface before other components are put into the housing, and when it is necessary to encapsulate the inside of the housing 212, the end cap 211 is then covered on the housing 212. The housing 212 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 212 can be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0088] The electrode assembly 213 is a component in the battery cell 21 where electrochemical reactions occur. One or more electrode assemblies 213 may be contained within the housing 212. The electrode assembly 213 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having active materials constitute the main body of the electrode assembly 213, and the portions of the positive electrode sheet and the negative electrode sheet without active substances respectively constitute electrode tabs (not shown in the figure). The positive electrode tab and the negative electrode tab may be located together at one end of the main body or separately at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals 214 to form a current loop.

[0089] Combined Figures 4 to 9 As shown, in a first aspect, the present application provides a battery device 10. In some embodiments of the present application, the battery device 10 includes a battery box body 30, a bus bar assembly 40, and a plurality of battery cells 21. An accommodation cavity 311 is formed inside the battery box body 30. Support beams 312 are provided on at least one side of the accommodation cavity 311 along the first direction X. The plurality of battery cells 21 are disposed in the accommodation cavity 311, and at least two battery cells 21 are arranged along the second direction Y. The two battery cells 21 arranged along the second direction Y are electrically connected through the bus bar assembly 40. An installation groove 3121 is formed on one side of the support beam 312 along the third direction Z. At least a part of the bus bar assembly 40 is configured to be inserted into the installation groove 3121 along the third direction Z; wherein, a plurality of cavities are formed inside the support beam 312, and at least a part of the cavities are formed into the installation groove 3121 by cutting. The first direction X intersects with the second direction Y, and the plane where the first direction X and the second direction Y are located together is perpendicular to the third direction Z.

[0090] Specifically, the battery box body 30 may include a box body 31 and a cover plate 32. An accommodation cavity 311 for accommodating the battery cells 21 is formed inside the box body 31. The box body 31 may include a frame structure with openings at both ends along the third direction Z. A bottom plate is provided on one side of the frame structure along the third direction Z. The bottom plate is used to seal one opening of the frame structure and jointly enclose the box body 31 with the frame structure. A cover plate 32 is provided on the other side of the box body 31 along the third direction Z. After the cover plate 32 is connected to the box body 31, it is used to block the other opening of the frame structure, thereby forming a closed space inside the battery box body 30 to prevent liquid or other foreign objects outside the battery box body 30 from damaging the battery cells 21.

[0091] Among them, support beams 312 are formed on at least one side of the frame structure along the first direction X, and the support beams 312 limit the battery cells 21 in the accommodation cavity 311 along the first direction X. Optionally, support beams 312 are respectively formed on both sides of the frame structure along the first direction X. Optionally, side beams 313 are also respectively formed on both sides of the frame structure along the second direction Y, and the side beams 313 limit the battery cells 21 in the accommodation cavity along the second direction Y. The support beams 312 and the side beams 313 are alternately arranged in sequence and connected end to end, thereby forming a substantially rectangular frame structure.

[0092] A plurality of battery cells 21 are provided in the accommodation cavity 311, and at least two of the battery cells 21 are arranged along the second direction Y and are electrically connected through a bus bar 40. For the convenience of description, only an example is given in which a plurality of battery cells 21 form two battery cell assemblies 20, the two battery cell assemblies 20 are arranged along the second direction Y, and any one of the battery cell assemblies 20 includes a plurality of battery cells 21 arranged and electrically connected along the first direction X. Among them, the battery cell 21 of one of the two battery cell assemblies 20 that is close to the support beam 312 along the first direction X and the battery cell 21 of the other that is close to the support beam 312 along the first direction X are electrically connected through the bus bar 40.

[0093] An installation groove 3121 is formed on one side of the support beam 312 along the third direction Z, and at least a part of the bus bar 40 is configured to be inserted into the installation groove 3121 along the third direction Z. Specifically, the installation groove 3121 is only provided with an opening on one side along the third direction Z, and the bus bar 40 can only be inserted into the installation groove 3121 along the third direction Z. Among them, the installation groove 3121 is formed on the side of the support beam 312 facing the cover plate 32 along the third direction Z, so as to facilitate inserting the bus bar 40 into the installation groove 3121 along the third direction Z after the cover plate 32 is disassembled.

[0094] Optionally, a plurality of cavities are formed inside the support beam 312, and the plurality of cavities can communicate with each other or not communicate with each other, so as to reduce the weight of the support beam 312 and reduce the cost of the support beam 312. Among them, by cutting the side walls of some of the cavities, the inside of the cavity is connected to the outside of the support beam 312, so that the cut cavity forms the installation groove 3121.

[0095] Optionally, the first direction X can be the length direction of the battery device 10, the second direction Y can be the width direction of the battery device 10, and the third direction Z can be the height direction of the battery device 10.

[0096] According to the battery device 10 of the present application, by forming a mounting groove 3121 on one side of the support beam 312 along the third direction Z, the busbar 40 can be inserted into the mounting groove 3121 along the third direction Z, thereby reducing the space occupied by the busbar 40 along the first direction X and the second direction Y, thereby reducing the size of the battery case 30 along the first direction X and the second direction Y, and facilitating the assembly of the battery device 10. At the same time, by forming multiple cavities within the support beam 312, the sidewalls of some of the cavities at corresponding positions can be cut according to the installation position of the busbar 40, thereby facilitating the formation of the mounting groove 3121. The uncut cavities still have sufficient support strength, thereby improving the support strength of the support beam 312 after cutting.

[0097] Combine Figures 4 to 9 As shown, in some embodiments of the present application, the plurality of cavities include a first cavity 3122 and a second cavity 3123 arranged on both sides of the support beam 312 along the first direction X, and the plurality of cavities also include a third cavity 3124 arranged between the first cavity 3122 and the second cavity 3123 along the first direction X, and part of the third cavity 3124 is formed by cutting to form at least part of the mounting groove 3121.

[0098] Specifically, the multiple cavities include a first cavity 3122 and a second cavity 3123 disposed on opposite sides of the support beam 312 along the first direction X. One of the first cavity 3122 and the second cavity 3123 is disposed on the side of the support beam 312 facing the battery cell 21, and the other of the first cavity 3122 and the second cavity 3123 is disposed on the other side of the support beam 312 facing away from the battery cell 21. A third cavity 3124 is disposed between the first cavity 3122 and the second cavity 3123. There may be one or more third cavities 3124. When there are multiple third cavities 3124, the multiple third cavities 3124 are disposed side by side along the first direction X and between the first cavity 3122 and the second cavity 3123 along the first direction X. Optionally, a portion of at least one of the third cavities 3124 is cut to form the mounting groove 3121. For the convenience of description, this application only takes the example of providing a third cavity 3124 between the first cavity 3122 and the second cavity 3123 for explanation.

[0099] Part of the third cavity 3124 located between the first cavity 3122 and the second cavity 3123 is cut to form at least part of the mounting groove 3121, which facilitates the formation of the mounting groove 3121. At the same time, the uncut first cavity 3122 and the second cavity 3123 still have sufficient supporting strength, thereby improving the supporting strength of the support beam 312 after cutting.

[0100] Combine Figures 4 to 9As shown, in some embodiments of the present application, the second cavity 3123 is provided along the first direction X on the side of the first cavity 3122 facing the battery cell 21 , and part of the second cavity 3123 is cut to form a partial mounting groove 3121 .

[0101] Specifically, the second cavity 3123 is located on the side of the support beam 312 facing the battery cell 21, and the first cavity 3122 is located on the other side of the support beam 312 facing away from the battery cell 21. Part of the second cavity 3123 is cut to form a partial mounting groove 3121, which communicates with the partial mounting groove 3121 formed by cutting the third cavity 3124, thereby forming a complete mounting groove 3121.

[0102] The second cavity 3123 arranged near the battery cell 21 is cut to form a partial installation groove 3121. After the busbar 40 is inserted into the installation groove 3121, it can be arranged close to the battery cell 21, thereby reducing the size of the busbar 40 along the first direction X, facilitating the electrical connection between the busbar 40 and the battery cell 21, and reducing the short circuit between the busbar 40 and other components of the battery device 10.

[0103] Combine Figures 4 to 9 As shown, in some embodiments of the present application, the battery device 10 further includes a pressing part 50, which is arranged on one side of the battery cell 21 along the third direction Z and between two adjacent battery cells 21 along the second direction Y. One end of the pressing part 50 along the first direction X is connected to the support beam 312 and is configured to limit the position of the battery cell 21 along the third direction Z.

[0104] Specifically, the press-fitting member 50 may be a strip-shaped structure extending along the first direction X. One end of the press-fitting member 50 along the first direction X is connected to the support beam 312 at one end of the box body 31 along the first direction X, and the other end of the press-fitting member 50 along the first direction X is connected to the support beam 312 at the other end of the box body 31 along the first direction X. Alternatively, the other end of the press-fitting member 50 along the first direction X is connected to other supporting structures of the box body 31. This secures the press-fitting member 50 to the side of the battery cell 21 facing the cover plate 32 along the third direction Z, and is positioned between two adjacent battery cell assemblies 20 along the second direction Y, thereby simultaneously limiting the position of the battery cells 21 in the two battery cell assemblies 20. Alternatively, the press-fitting member 50 may be a steel strip.

[0105] The press-fitting member 50 is connected to the support beam 312 to limit the position of the battery cell 21 along the third direction Z, thereby reducing the movement of the battery cell 21 along the third direction Z.

[0106] Combine Figures 4 to 9As shown, in some embodiments of the present application, the support beam 312 includes a main body portion 3125. The main body portion 3125 forms a mounting groove 3121 by cutting. The mounting groove 3121 includes a first groove portion 31211 and a second groove portion 31212. Part of the third cavity 3124 forms the first groove portion 31211 by cutting, and part of the second cavity 3123 forms the second groove portion 31212 by cutting. A second groove portion 31212 is respectively provided at both ends of the first groove portion 31211 along the first direction X. The support beam 312 further includes a fixing portion 3126 disposed between the two second groove portions 31212. The press-fitting member 50 is connected to the fixing portion 3126.

[0107] Specifically, inside the main body portion 3125 before cutting, a first cavity 3122, a second cavity 3123, and a third cavity 3124 are arranged in sequence along the first direction X, and the first cavity 3122, the second cavity 3123, and the third cavity 3124 continuously penetrate the main body portion 3125 in the second direction Y respectively. After the main body portion 3125 is cut, a mounting groove 3121 is formed at the original position of part of the cavities, so that part of the cavities no longer continuously penetrate the main body portion 3125. Among them, part of the third cavity 3124 forms the first groove portion 31211 by cutting, and part of the second cavity 3123 forms the second groove portion 31212 by cutting, and the first groove portion 31211 and the second groove portion 31212 together form the mounting groove 3121. Among them, a second groove portion 31212 is respectively provided at both ends of the first groove portion 31211 along the second direction Y, and the second groove portion 31212 is provided on the side of the first groove portion 31211 close to the battery cell 21 and is communicated with the first groove portion 31211. Among them, the second groove portions 31212 located at both ends of the first groove portion 31211 along the second direction Y are arranged at intervals, and the uncut part of the main body portion 3125 between the two second groove portions 31212 along the second direction Y forms the fixing portion 3126, and the press-fitting member 50 can be connected to the fixing portion 3126. Among them, part of the second cavity 3123 is formed inside the fixing portion 3126.

[0108] By providing the fixing portion 3126 between the two second groove portions 31212, the press-fitting member 50 can be connected to the fixing portion 3126, so that the press-fitting member 50 is connected to the support beam 312, and the position of the battery cell 21 is restricted along the third direction Z through the press-fitting member 50.

[0109] Combined Figures 4 to 9 As shown, in some embodiments of the present application, the battery device 10 further includes a mounting member 60 and a connecting member 70. At least part of the mounting member 60 is disposed on the side of the fixing portion 3126 facing the press-fitting member 50 along the third direction Z. The connecting member 70 sequentially penetrates through the press-fitting member 50 and the mounting member 60 along the third direction Z and is connected to the mounting member 60.

[0110] Specifically, since a second cavity 3123 is formed inside the fixing part 3126, if the press-fitting part 50 is directly connected to the fixing part 3126, the press-fitting part 50 can only be connected to the side wall of the second cavity 3123 in the fixing part 3126, which easily leads to unstable connection between the press-fitting part 50 and the support beam 312. Therefore, at least part of the mounting part 60 is arranged on the side of the fixing part 3126 facing the press-fitting part 50 along the third direction Z, and the connection size between the fixing part 3126 and the connecting part 70 is increased through the mounting part 60, so as to improve the connection strength between the press-fitting part 50 and the support beam 312. Optionally, the mounting part 60 can be a steel plate, and part of the steel plate is bonded or welded to the side of the fixing part 3126 facing the press-fitting part 50 along the third direction Z. The connecting part 70 can be a connecting bolt, and a threaded hole 61 is provided inside the mounting part 60, and the connecting part 70 is passed through the threaded hole 61 and threadedly connected to the threaded hole 61.

[0111] Since a cavity is also provided inside the fixing part 3126 and it is inconvenient to directly connect to the connecting part 70, an mounting part 60 is provided on the side of the fixing part 3126 facing the press-fitting part 50 along the third direction Z. The connecting part 70 is sequentially passed through the press-fitting part 50 and the mounting part 60 along the third direction Z and is connected to the mounting part 60, thereby improving the connection strength between the connecting part 70 and the fixing part 3126.

[0112] Combined Figures 4 to 10 As shown in the figure, in some embodiments of the present application, the first cavity 3122 of the main body part 3125 is communicated with the accommodating cavity 311, and plugging parts 3128 are respectively arranged in the second cavity 3123 and the third cavity 3124 of the main body part 3125.

[0113] Specifically, the first cavity 3122 can be communicated with the accommodating cavity 311 through the side beam 313. A cavity communicating with the first cavity 3122 is formed inside the side beam 313, and exhaust holes communicating with the internal cavity of the side beam 313 are provided on the inner side wall of the side beam 313 facing the battery cell 21.

[0114] When the internal pressure of the battery cell 21 increases and causes the pressure relief device to open, such as when the exhaust valve opens, the high-temperature gas inside the battery cell 21 can be discharged to the accommodation cavity 311 through the pressure relief device. By connecting the first cavity 3122 to the accommodation cavity 311, the high-temperature gas in the accommodation cavity 311 can flow into the first cavity 3122 and be discharged to the outside of the battery device 10 through the first cavity 3122. Blocking members 3128 are respectively provided in the second cavity 3123 and the third cavity 3124, which can reduce the inflow of the high-temperature gas in the accommodation cavity 311 into the second cavity 3123 and the third cavity 3124, and reduce the outflow of the high-temperature gas through the second cavity 3123 and the third cavity 3124 and acting on the bus bar 40, thereby reducing the damage of the high-temperature gas to the bus bar 40. Optionally, the blocking member 3128 can be sealant.

[0115] Combined with Figures 4 to 9 As shown, in some embodiments of the present application, a partition 3127 is provided inside at least one cavity, and the partition 3127 is configured to divide the interior of the cavity into multiple cavities along the third direction Z.

[0116] Specifically, the partition 3127 is a substantially plate-like structure, and the plate surface of the partition 3127 forms an angle greater than 0° and less than or equal to 90° with the third direction Z, so as to divide the interior of the cavity into multiple cavities along the third direction Z through the partition 3127. Optionally, partitions 3127 are respectively provided in the second cavity 3123 and the third cavity 3124, so as to divide the second cavity 3123 and the third cavity 3124 into multiple cavities along the third direction Z through the partitions 3127, and the second cavity 3123 and the third cavity 3124 can be cut to the corresponding partition 3127 positions according to the size of the bus bar 40 along the third direction Z, so that the cut installation groove 3121 has sufficient dimensions along the third direction Z to accommodate the bus bar 40.

[0117] By providing the partition 3127 in the cavity, the partition 3127 at the corresponding position can be cut according to the size of the bus bar 40 along the third direction Z, so as to facilitate the formation of the installation groove 3121, and the uncut partition 3127 can improve the support strength of the support beam 312.

[0118] Combined with Figures 4 to 9 As shown, in some embodiments of the present application, the battery device 10 further includes a connection wire harness (not shown in the figure), the connection wire harness is electrically connected to the battery cell 21, and at least part of the connection wire harness is configured to be inserted into the installation groove 3121 along the third direction Z.

[0119] Specifically, the connection wire harness may include a low-voltage sampling wire harness for collecting the working signals of the battery cell 21 and transmitting the collected working signals to the controller. The working signals of the battery cell 21 include but are not limited to voltage and temperature. Optionally, the connection wire harness may be arranged in a sheet structure and inserted into the mounting groove 3121 together with a part of the busbar 40, and arranged along the first direction X with the part of the busbar 40.

[0120] By configuring at least part of the connection wire harness to be inserted into the mounting groove 3121 along the third direction Z, it is convenient to install the connection wire harness and can reduce the space occupied by the connection wire harness along the first direction X and the second direction Y, thereby reducing the dimensions of the battery box 30 along the first direction X and the second direction Y and facilitating the assembly of the battery device 10.

[0121] Combined Figures 4 to 11 As shown, in some embodiments of the present application, the busbar 40 includes a first conductive part 41 and a second conductive part 42. A second conductive part 42 is respectively provided at both ends of the first conductive part 41 along the second direction Y. The first conductive part 41 is inserted into the mounting groove 3121, and the two second conductive parts 42 are respectively arranged on one side of the support beam 312 along the third direction Z and are electrically connected to the two battery cells 21 arranged along the second direction Y in one-to-one correspondence.

[0122] Specifically, the busbar 40 includes a first conductive portion 41 and a second conductive portion 42, each of which is a roughly plate-shaped structure. The plate surface of the first conductive portion 41 is perpendicular to the first direction X and can be inserted into the mounting groove 3121 along the third direction Z. The plate surface of the second conductive portion 42 is perpendicular to the third direction Z and is arranged outside the mounting groove 3121 along the third direction Z, so that the battery cells 21 can be electrically connected. Among them, a second conductive portion 42 is respectively provided at both ends of the first conductive portion 41 along the second direction Y, and the two second conductive portions 42 are respectively connected one-to-one with the two battery cells 21 arranged along the second direction Y, thereby electrically connecting the two battery cells 21 arranged along the second direction Y through the busbar 40. Optionally, the two second conductive portions 42 are respectively provided with a connecting portion 421, and the two connecting portions 421 are respectively connected one-to-one with the electrode terminals 214 of the two battery cells 21. Optionally, one of the two second conductive portions 42 is provided with a first positioning hole 422, and the other of the two second conductive portions 42 is provided with a second positioning hole 423. The first positioning hole 422 is a circular hole and can be mated and connected with the positioning post 215 on one of the battery cells 21. The second positioning hole 423 is a strip-shaped hole and can be sleeved onto the outside of the positioning post 215 on the other battery cell 21. The length of the strip-shaped hole is consistent with the second direction Y, so that even if the spacing between the positioning posts 215 on the two battery cells 21 deviates along the second direction Y, they can still be inserted into the first positioning hole 422 and the second positioning hole 423, respectively.

[0123] By inserting the first conductive part 41 into the installation groove 3121, the space occupied by the busbar 40 along the first direction X and the second direction Y can be reduced, thereby reducing the size of the battery box 30 along the first direction X and the second direction Y, making it easier to assemble the battery device 10. At the same time, by arranging the two second conductive parts 42 on one side of the support beam 312 along the third direction Z, and electrically connecting them one by one with the two battery cells 21 arranged along the second direction Y, it is convenient to connect the two battery cells 21 arranged along the second direction Y through the busbar 40.

[0124] Combine Figures 4 to 11 As shown, in some embodiments of the present application, the first conductive portion 41 includes a first plate portion 411 and a second plate portion 412. The first plate portion 411 is arranged on the side of the second plate portion 412 away from the battery cell 21 along the first direction X. A second plate portion 412 is respectively provided at both ends of the first plate portion 411 along the second direction Y, and the two second conductive portions 42 are respectively connected to the two second plate portions 412 in a one-to-one correspondence.

[0125] Specifically, in some embodiments of the present application, the support beam 312 further includes a fixing portion 3126 disposed between two second slots 31212 spaced apart along the second direction Y. If the first conductive portion 41 is a flat plate and inserted into the second slot 31212, interference with the fixing portion 3126 may occur. Therefore, a structure is required on the first conductive portion 41 to avoid the fixing portion 3126. By disposing the first plate portion 411 along the first direction X on the side of the second plate portion 412 facing away from the battery cell 21, a step-like structure is formed between the first plate portion 411 and the second plate portion 412. This structure avoids the fixing portion 3126 when the first conductive portion 41 is inserted into the mounting slot 3121. The first plate portion 411 is inserted into the first slot 31211, and the second plate portion 412 is inserted into the second slot 31212. Optionally, the first conductive portion 41 further includes a third plate portion 413 . The third plate portion 413 is disposed between the first plate portion 411 and the second plate portion 412 along the first direction X and is used to connect the first plate portion 411 and the second plate portion 412 .

[0126] By arranging the first plate portion 411 along the first direction X on the side of the second plate portion 412 away from the battery cell 21, it is convenient to set the fixing portion 3126 at the position corresponding to the support beam 312 and the first plate portion 411, thereby improving the supporting strength of the support beam 312 and facilitating connection with the press-fit part 50.

[0127] Combination Figure 4 middle Figure 11 As shown, in some embodiments of the present application, a buffer member 414 is provided on one side of the first plate portion 411 along the first direction X toward the battery cell 21 ; and / or a buffer member 414 is provided on one side of the first plate portion 411 along the first direction X away from the battery cell 21 .

[0128] Specifically, when the battery assembly 10 is installed in an electrical device, such as a vehicle, the vehicle may bump and shake during driving. The battery assembly 10 may shake along with the vehicle, which can easily cause the busbar 40 to strike the inner wall of the mounting groove 3121, causing damage to the busbar 40. Therefore, a buffer member 414 can be provided on the surface of the first plate portion 411 to provide a buffering force when the busbar 40 strikes the inner wall of the mounting groove 3121, thereby reducing the impact on the busbar 40 and minimizing damage to the busbar 40. Optionally, the buffer member 414 can be a foam member that can be bonded to the surface of the first plate portion 411.

[0129] By providing a buffer member 414 on the side of the first plate portion 411 facing the battery cell 21 along the first direction X, and / or providing a buffer member 414 on the side of the first plate portion 411 facing away from the battery cell 21 along the first direction X, the impact force received when a collision occurs between the first plate portion 411 and the inner wall surface of the mounting groove 3121 can be reduced, thereby reducing damage to the busbar 40.

[0130] Combination Figure 4 middle Figure 11 As shown, in some embodiments of the present application, the outer surface of the first conductive part 41 is covered with an insulating layer.

[0131] Specifically, in some embodiments of the present application, the support beam 312 can be a conductive member, such as a metal conductive member. To reduce the risk of short circuits between the first conductive portion 41 and the support beam 312, the outer surface of the first conductive portion 41 is coated with an insulating layer. Alternatively, the insulating layer can be formed by powder coating the outer surface of the first conductive portion 41 with an insulating material, or the insulating material can be heat-shrunk onto the outer surface of the first conductive portion 41.

[0132] Since the outer surface of the first conductive portion 41 is coated with an insulating layer, a short circuit between the current bus 40 and the support beam 312 or other components in the battery box 30 can be reduced.

[0133] like Figure 1 As shown, in a second aspect, the present application proposes an electrical device, which includes any one of the battery devices 10 described above.

[0134] Since the electrical equipment in the present application has the same technical features as the battery device 10 in any of the above embodiments and can achieve the same technical effects, it will not be described in detail here.

[0135] like Figure 1 As shown, in some embodiments of the present application, the electrical device may be a vehicle 1, which includes a battery device 10 according to any of the above embodiments. The battery device 10 is used to provide electrical energy to the vehicle 1 and to drive the vehicle 1 to move.

[0136] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0137] Combination Figures 4 to 11As shown, in some embodiments of the present application, the battery device 10 includes a battery box 30, a busbar 40, and a plurality of battery cells 21. An accommodation cavity 311 is formed inside the battery box 30. At least one side of the accommodation cavity 311 along the first direction X is provided with a support beam 312. The plurality of battery cells 21 are arranged in the accommodation cavity 311, and at least two battery cells 21 are arranged along the second direction Y. Two battery cells 21 arranged along the second direction Y are electrically connected through the busbar 40. An installation groove 3121 is formed on one side of the support beam 312 along the third direction Z. At least part of the busbar 40 is configured to be inserted into the installation groove 3121 along the third direction Z; wherein, a plurality of cavities are formed inside the support beam 312, and at least part of the cavities form the installation groove 3121 by cutting. The first direction X intersects with the second direction Y, and the plane where the first direction X and the second direction Y are located together is perpendicular to the third direction Z.

[0138] Optionally, the plurality of cavities include a first cavity 3122 and a second cavity 3123 arranged on both sides of the support beam 312 along the first direction X. The second cavity 3123 is arranged along the first direction X on the side of the first cavity 3122 facing the battery cell 21. The plurality of cavities further include a third cavity 3124 arranged along the first direction X between the first cavity 3122 and the second cavity 3123.

[0139] Optionally, the battery device 10 further includes a press-fitting member 50. The press-fitting member 50 is arranged on one side of the battery cell 21 along the third direction Z and is arranged between two adjacent battery cells 21 along the second direction Y. One end of the press-fitting member 50 along the first direction X is connected to the support beam 312 and is configured to limit the position of the battery cell 21 along the third direction Z.

[0140] Optionally, the support beam 312 includes a main body portion 3125. The main body portion 3125 forms the installation groove 3121 by cutting. The installation groove 3121 includes a first groove portion 31211 and a second groove portion 31212. Part of the third cavity 3124 forms the first groove portion 31211 by cutting, and part of the second cavity 3123 forms the second groove portion 31212 by cutting. One second groove portion 31212 is respectively arranged at both ends of the first groove portion 31211 along the first direction X. The support beam 312 further includes a fixing portion 3126 arranged between the two second groove portions 31212. The press-fitting member 50 is connected to the fixing portion 3126.

[0141] Optionally, the battery device 10 further includes a mounting member 60 and a connecting member 70. At least part of the mounting member 60 is arranged on the side of the fixing portion 3126 facing the press-fitting member 50 along the third direction Z. The connecting member 70 sequentially passes through the press-fitting member 50 and the mounting member 60 along the third direction X and is connected to the mounting member 60.

[0142] Optionally, the first cavity 3122 of the main body 3125 is communicated with the accommodating cavity 311 , and blocking pieces 3128 are respectively provided in the second cavity 3123 and the third cavity 3124 of the main body 3125 .

[0143] Optionally, partitions 3127 are respectively provided inside the first cavity 3122, the second cavity 3123 and the third cavity 3124, and the partitions 3127 are configured to separate the interiors of the first cavity 3122, the second cavity 3123 and the third cavity 3124 into multiple cavities along the third direction Z.

[0144] Optionally, the battery device 10 further includes a connecting harness, which is electrically connected to the battery cell 21 , and at least a portion of the connecting harness is configured to be inserted into the mounting groove 3121 along the third direction Z.

[0145] Optionally, the busbar 40 includes a first conductive part 41 and a second conductive part 42, and a second conductive part 42 is respectively provided at both ends of the first conductive part 41 along the second direction Y. The first conductive part 41 is inserted into the mounting groove 3121, and the two second conductive parts 42 are respectively arranged on one side of the support beam 312 along the third direction Z, and are electrically connected one by one to the two battery cells 21 arranged along the second direction Y.

[0146] Optionally, the first conductive portion 41 includes a first plate portion 411 and a second plate portion 412, the first plate portion 411 is arranged on the side of the second plate portion 412 away from the battery cell 21 along the first direction X, and a second plate portion 412 is correspondingly provided at both ends of the first plate portion 411 along the second direction Y, and the two second conductive portions 42 are respectively connected to the two second plate portions 412 one by one.

[0147] Optionally, a buffer member 414 is provided on a side of the first plate portion 411 facing the battery cell 21 along the first direction X. Meanwhile, a buffer member 414 is provided on a side of the first plate portion 411 facing away from the battery cell 21 along the first direction X.

[0148] Optionally, the outer surface of the first conductive part 41 is covered with an insulating layer.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A battery box body, an accommodation cavity is formed inside the battery box body, and support beams are provided on at least one side of the accommodation cavity along a first direction; A plurality of battery cells, the plurality of battery cells are arranged in the accommodation cavity, and at least two of the battery cells are arranged along a second direction; A busbar, two battery cells arranged along the second direction are electrically connected through the busbar, an installation groove is formed on one side of the support beam along a third direction, and at least part of the busbar is configured to be inserted into the installation groove along the third direction; Wherein, a plurality of cavities are formed inside the support beam, at least part of the cavities form the installation groove by cutting, the first direction intersects with the second direction, and the plane where the first direction and the second direction are located together is perpendicular to the third direction.

2. The battery device according to claim 1, characterized in that, The plurality of cavities include a first cavity and a second cavity arranged on both sides of the support beam along the first direction, the plurality of cavities further include a third cavity arranged between the first cavity and the second cavity along the first direction, and part of the third cavity forms at least part of the installation groove by cutting.

3. The battery device according to claim 2, characterized in that, The second cavity is arranged on one side of the first cavity facing the battery cell along the first direction, and part of the second cavity forms part of the installation groove by cutting.

4. The battery device according to claim 3, characterized in that, The battery device further includes a pressing member, the pressing member is arranged on one side of the battery cell along the third direction, and is arranged between two adjacent battery cells along the second direction, one end of the pressing member along the first direction is connected to the support beam, and is configured to limit the position of the battery cell along the third direction.

5. The battery device according to claim 4, characterized in that, The support beam includes a main body part, the main body part forms the installation groove by cutting, the installation groove includes a first groove part and a second groove part, part of the third cavity forms the first groove part by cutting, part of the second cavity forms the second groove part by cutting, a second groove part is respectively arranged at both ends of the first groove part along the first direction, the support beam further includes a fixing part arranged between the two second groove parts, and the pressing member is connected to the fixing part.

6. The battery device according to claim 5, characterized in that, The battery device further includes a mounting member and a connecting member, at least part of the mounting member is arranged on one side of the fixing part facing the pressing member along the third direction, the connecting member sequentially penetrates through the pressing member and the mounting member along the third direction, and is connected to the mounting member.

7. The battery device according to claim 5, characterized in that, The first cavity of the main body part is communicated with the accommodation cavity, and blocking members are respectively arranged in the second cavity and the third cavity of the main body part.

8. The battery device according to claim 1, characterized in that, A partition is arranged inside at least one of the cavities, and the partition is configured to divide the inside of the cavity into a plurality of cavities along the third direction.

9. The battery device according to any one of claims 1 to 8, characterized in that, The battery device further includes a connection wire harness, the connection wire harness is electrically connected to the battery cell, and at least part of the connection wire harness is configured to be inserted into the installation groove along the third direction.

10. The battery device according to any one of claims 1 to 8, characterized in that, The busbar includes a first conductive part and a second conductive part, and the first conductive part is respectively provided with a second conductive part at both ends along the second direction. The first conductive part is inserted into the installation groove, and the two second conductive parts are respectively arranged on one side of the support beam along the third direction, and are electrically connected one-to-one with the two battery cells arranged along the second direction.

11. The battery device according to claim 10, characterized in that, The first conductive portion includes a first plate portion and a second plate portion. The first plate portion is arranged on a side of the second plate portion away from the battery cell along the first direction. A second plate portion is correspondingly provided at each end of the first plate portion along the second direction. The two second conductive portions are respectively connected to the two second plate portions in a one-to-one correspondence.

12. The battery device according to claim 11, wherein, A buffer is provided on a side of the first plate portion facing the battery cell along the first direction; and / or a buffer is provided on a side of the first plate portion facing away from the battery cell along the first direction.

13. The battery device according to claim 10, characterized in that, The outer surface of the first conductive portion is covered with an insulating layer.

14. An electrical device, characterized in that, A battery device according to any one of claims 1 to 13.

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