Battery device, power utilization device and circuit board

Abstract

The utility model provides a battery device, a power utilization device and a circuit board, and belongs to the technical field of batteries. The battery device comprises a box body, a plurality of battery monomer components, a battery management system and a sampling assembly, the plurality of battery monomer assemblies are arranged along a first direction and are accommodated in the box body; each battery monomer assembly comprises a plurality of battery monomers which are stacked along a second direction; the battery management system includes a control member disposed on one side of the battery cell assembly in the second direction. The sampling assembly comprises a circuit board and a sampling piece, the circuit board comprises a main body area, a connecting area and a plugging area, the main body area extends in the second direction and is arranged on one side of the battery monomer assembly in the third direction, the connecting area is connected with the main body area and the plugging area, the connecting area extends in the first direction, and the plugging area is in plugging fit with the control piece; the sampling piece is electrically connected with the main body area. According to the battery device with the structure, the layout of the circuit board can be optimized, so that the internal space utilization rate of the battery device is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries, as the power source, play an irreplaceable and crucial role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of stability and reliability in use.

[0003] In battery technology, a battery device typically includes a housing and multiple battery cells housed within it. To ensure the safety of the battery device, a battery management system and a sampling assembly are usually installed inside. The sampling assembly is electrically connected to the battery management system and can collect and monitor information such as voltage or temperature of the battery cells during use, so as to obtain information on the usage status of the battery device. However, the sampling assembly of existing battery devices occupies a lot of space inside the housing and is difficult to assemble, which is not conducive to improving the energy density of the battery device and the production efficiency of the battery device. Utility Model Content

[0004] This application provides a battery device, an electrical device, and a circuit board, which can effectively improve the energy density and production efficiency of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including a housing, a plurality of battery cell assemblies, a battery management system, and a sampling assembly; the plurality of battery cell assemblies are arranged along a first direction and housed within the housing, each battery cell assembly comprising a plurality of battery cells stacked along a second direction; the battery management system includes a control component disposed on one side of the battery cell assembly in the second direction; the sampling assembly includes a circuit board and a sampling component, the circuit board including a main body area, a connection area, and a plug-in area, the main body area extending along the second direction and disposed on one side of the battery cell assembly in a third direction, the connection area connecting the main body area and the plug-in area, the connection area extending along the first direction, the plug-in area plugging into the control component to electrically connect the sampling assembly and the control component, the sampling component being electrically connected to the main body area, and the sampling component being configured to collect information from the battery cells, wherein the first direction, the second direction, and the third direction are mutually perpendicular.

[0006] In the above technical solution, a sampling assembly is provided inside the battery device. The sampling assembly includes a circuit board and a sampling component. The circuit board includes a main body area, a connection area, and a plug-in area connected in sequence. The sampling component is electrically connected to the main body area, and the plug-in area can be plugged into and cooperate with the control component to realize that the sampling component is electrically connected to the control component through the circuit board. This enables the battery management system to collect information of the battery cells during use. The control component is located on one side of the battery cell assembly in the second direction. By setting the main body area to extend along the second direction and located on the third side of the battery cell assembly in the third direction, and setting the connection area to extend along the first direction, it is convenient to assemble the sampling assembly into the housing, which helps to reduce the interference between the sampling assembly and other components, and improves the flexibility of the plug-in cooperation between the control component and the circuit board, thereby reducing the difficulty of plugging and cooperating between the circuit board and the control component. This reduces the assembly difficulty of the battery device and improves the production efficiency of the battery device. On the other hand, it optimizes the layout of the circuit board and the control component in the housing, reducing the influence of the layout of the control component on the layout of the main body area of ​​the circuit board, and saving the space occupied by the circuit board in the second direction, thereby improving the internal space utilization of the battery device and increasing the energy density of the battery device.

[0007] In some embodiments, the battery device includes a plurality of the sampling assemblies, the main body regions of the plurality of sampling assemblies being spaced apart along the first direction; wherein at least one of the control elements is inserted into the insertion regions of at least two of the sampling assemblies.

[0008] In the above technical solution, the battery device is provided with multiple sampling assemblies. The control unit is plugged into the plug-in area of ​​at least two sampling assemblies, and the main body areas of the multiple sampling assemblies are arranged at intervals along the first direction. This allows the multiple sampling assemblies to share a single control unit while also optimizing the layout of the circuit boards of the multiple sampling assemblies within the housing. The connection area and the main body area of ​​the circuit board are structures that extend along the first and second directions, respectively. This reduces the plugging difficulty between the circuit boards of the sampling assemblies and the control unit while allowing multiple sampling assemblies to share a single control unit. It also saves on the number of control units within the battery device, which is beneficial for improving the internal space utilization of the battery device and reducing the manufacturing cost of the battery device.

[0009] In some embodiments, along the first direction, the plurality of sampling assemblies include adjacent first sampling assemblies and second sampling assemblies, the connection area of ​​the first sampling assembly extending from the body area toward the direction of the second sampling assembly, the connection area of ​​the second sampling assembly extending from the body area toward the direction of the first sampling assembly, and the plug-in area of ​​the first sampling assembly and the plug-in area of ​​the second sampling assembly plugging into a control element.

[0010] In the above technical solution, by setting the connection area of ​​the first sampling assembly and the connection area of ​​the second sampling assembly that are plugged into the same control component as a structure that extends towards each other in a first direction, on the one hand, the difficulty of plugging into the circuit board of the first sampling assembly and the circuit board of the second sampling assembly with the same control component can be further reduced, thereby reducing the assembly difficulty of the battery device. On the other hand, the layout of the control component and multiple sampling assemblies in the housing can be further optimized, which is conducive to reducing the interference between the control component and the sampling assembly and other components.

[0011] In some embodiments, in a projection plane perpendicular to the third direction, the orthographic projection of the main body area of ​​the first sampling assembly and the orthographic projection of the main body area of ​​the second sampling assembly are respectively located on both sides of the orthographic projection of the corresponding control element in a first direction.

[0012] In the above technical solution, by setting the orthographic projection of the main body area of ​​the first sampling assembly and the main body area of ​​the second sampling assembly in a projection plane perpendicular to the third direction as a structure located on both sides of the orthographic projection of the corresponding control component in the first direction, the control component is arranged between the corresponding first sampling assembly and the second sampling assembly along the first direction. This facilitates the assembly and connection of the control component with the first sampling assembly and the second sampling assembly, and helps to further reduce the assembly difficulty of the first sampling assembly and the second sampling assembly sharing a control component, thereby reducing the assembly difficulty of the battery device.

[0013] In some embodiments, the plurality of sampling assemblies include multiple groups of sampling assemblies arranged along the first direction, each group of sampling assemblies including the first sampling assembly and the second sampling assembly, and each group of sampling assemblies being electrically connected to one of the control components.

[0014] In the above technical solution, by setting the multiple sampling assemblies in the battery device to include multiple sets of first sampling assemblies and second sampling assemblies arranged along the first direction, it is possible to realize that every two sampling assemblies in the multiple sampling assemblies share a control unit, thereby further saving the number of control units in the battery device, which is conducive to further improving the internal space utilization of the battery device and further reducing the manufacturing cost of the battery device.

[0015] In some embodiments, in a projection plane perpendicular to the third direction, the orthographic projection of the control element and the orthographic projection of the main body area of ​​the sampling assembly are arranged at intervals along the first direction.

[0016] In the above technical solution, by setting the orthographic projection of the main body area of ​​the control component and the sampling assembly in a projection plane perpendicular to the third direction as a structure arranged at intervals along the first direction, the main body area of ​​the control component and the sampling assembly is staggered in the second direction. This facilitates the interlocking and cooperation between the control component and the circuit board with an "L" shaped structure, which helps to reduce the assembly difficulty between the circuit board and the control component. On the other hand, it can reduce the interference between the main body area and the control component, and further optimize the layout planning of the control component and the main body area in the housing, so as to reduce the phenomenon that the layout of the control component is affected by the layout of the main body area of ​​the circuit board.

[0017] In some embodiments, the circuit board is bent to form a bending region, the bending region connecting the main body region and the connection region.

[0018] In the above technical solution, the circuit board is bent to form a structure in which the main body area, the bending area and the connecting area are connected in sequence, so that the extension direction of the main body area is perpendicular to the extension direction of the connecting area. The circuit board with this structure only needs to be processed into a strip structure that extends along a straight trajectory before bending the circuit board. This reduces the difficulty of processing and forming the circuit board, thereby reducing the manufacturing difficulty of the circuit board. On the other hand, processing the circuit board into a strip structure during the production process reduces the waste of raw materials compared to directly processing the circuit board into an "L" shaped structure, which is conducive to reducing the manufacturing cost of the circuit board.

[0019] In some embodiments, the thickness direction of the main body region is parallel to the third direction, and in a projection plane perpendicular to the third direction, the orthographic projection portion of the connecting region overlaps with the orthographic projection portion of the main body region.

[0020] In the above technical solution, by setting the connection area and the main body area as a partially overlapping structure in the third direction, the connection area and the main body area are stacked in the third direction after the circuit board is bent. This can save the space occupied by the circuit board in the third direction, reduce the difficulty of assembling the circuit board into the box, and optimize the layout of the circuit board in the box.

[0021] In some embodiments, the plug-in area includes a plurality of sub-plug-in areas, the connection area includes a plurality of sub-connection areas, the bending area includes a plurality of sub-bending areas, each of the sub-plug-in areas is connected to one of the sub-connection areas, and each of the sub-connection areas is connected to the main body area through one of the sub-bending areas; wherein, the plurality of sub-connection areas are stacked along the third direction.

[0022] In the above technical solution, by setting the plug-in area of ​​the circuit board as a structure in which multiple sub-plug-in areas cooperate with each other to plug into the control components, and setting the connection area and bending area of ​​the circuit board as corresponding multiple sub-connection areas and multiple sub-bending areas respectively, each sub-plug-in area is connected to a sub-bending area through a sub-connection area and a sub-bending area through a bending area, thereby improving the flexibility of the plug-in cooperation between the circuit board and the control components to adapt to different control components, and improving the layout flexibility of the connection area to meet different assembly requirements. In particular, by setting the multiple sub-connection areas of the connection area as a structure stacked along a third direction, the multiple sub-connection areas of the connection area can also share part of the space in the second direction, which is conducive to further saving the space occupied by the connection area in the second direction, thereby improving the internal space utilization of the battery device, and reducing the interference between the connection area and other components.

[0023] In some embodiments, the main body region includes a main body portion and a plurality of connecting portions, the main body portion being electrically connected to the sampling member, and the plurality of connecting portions being spaced apart along the first direction and all connected to one end of the main body portion in the second direction; wherein, each of the sub-bending regions is connected to the main body portion through one of the connecting portions.

[0024] In the above technical solution, by setting the main body area as a main body and multiple connecting parts, and each connecting part connecting a bending area and the main body, the flexibility of each sub-connecting area to bend relative to the main body area can be improved while realizing the connection area to the main body area through the bending area. This makes it easier to bend the circuit board to form multiple sub-connecting areas stacked along a third direction, and can further reduce the forming difficulty of each sub-bending area.

[0025] In some embodiments, the control member has a socket on the side facing the battery cell assembly in the second direction, and the sub-plug area is inserted into the socket along the second direction to electrically connect the sampling assembly and the control member; wherein, along the second direction, the sub-plug area is connected to the side of the corresponding sub-connection area opposite to the main body area.

[0026] In the above technical solution, by setting the socket on the side of the control component facing the battery cell assembly in the second direction, and setting each sub-plug area on the side of the corresponding sub-connection area away from the main body area in the second direction, the sub-plug area can be inserted into the socket of the control component along the second direction, thereby reducing the difficulty of the plug area of ​​the circuit board and the control component to plug and cooperate with each other, which is conducive to improving the assembly efficiency of the battery device.

[0027] In some embodiments, a plurality of the sub-plug areas are stacked along the third direction.

[0028] In the above technical solution, by setting the multiple sub-plug areas of the plug-in area as a structure stacked along a third direction, on the one hand, it can meet the requirement that the multiple sub-plug areas are stacked along a third direction and plugged into the control component, so as to meet the usage requirement that the multiple ports of the control component are arranged along a third direction. On the other hand, it can realize that the multiple sub-plug areas of the plug-in area share part of the space in the first direction, which is conducive to saving the space occupied by the plug-in area in the first direction and improving the internal space utilization of the battery device.

[0029] In some embodiments, in a projection plane perpendicular to the third direction, the orthographic projections of the plurality of sub-plug areas form an overlapping area, and at least a portion of the orthographic projection of each sub-plug area is located in the overlapping area.

[0030] In the above technical solution, the orthographic projections of multiple sub-plug areas in the third direction form an overlapping area, and at least a portion of the orthographic projection of each sub-plug area is located within the overlapping area, so that at least a portion of each sub-plug area is a structure that is stacked with other sub-plug areas in the third direction, thereby further saving the space occupied by the plug area in the first direction and further improving the internal space utilization of the battery device.

[0031] In some embodiments, the orthographic projections of the plurality of sub-plug areas completely overlap in a projection plane perpendicular to the third direction.

[0032] In the above technical solution, by setting the projection of multiple sub-plug areas in the third direction to a completely overlapping structure, it is possible to facilitate the insertion and cooperation of multiple sub-plug areas with the control component, which helps to reduce the assembly difficulty between multiple sub-plug areas and the control component, and also reduces the manufacturing difficulty of the control component. On the other hand, it can further save the space occupied by the plug area in the first direction, so as to further improve the internal space utilization of the battery device.

[0033] In some embodiments, at least one of the sub-connection regions is bent to form a first connection segment, a bent segment, and a second connection segment connected in sequence. The first connection segment extends along the first direction and is connected to the sub-bent segment. The bent segment is located at the end of the first connection segment away from the sub-bent segment in the first direction. The sub-plug area is connected to the second connection segment. In the third direction, the first connection segment and the second connection segment are disposed opposite to each other.

[0034] In the above technical solution, by setting at least one sub-connection area to form a structure of a first connection segment, a bent segment, and a second connection segment connected in sequence by bending, and the bent segment is located at the end of the first connection segment away from the sub-bent area in a first direction, and the first connection segment and the second connection segment are arranged opposite each other in a third direction, the sub-plug area connected to the sub-connection area can be stacked with other sub-plug areas in a third direction by bending the sub-connection area. On the one hand, this reduces the difficulty of stacking multiple sub-plug areas in a third direction, and on the other hand, it can meet different plugging requirements by bending the sub-connection area in different ways or not bending it, thereby improving the applicability of the circuit board.

[0035] In some embodiments, in a projection plane perpendicular to the third direction, a plurality of the sub-plug areas are arranged at intervals along the first direction.

[0036] In the above technical solution, by setting the multiple sub-plug areas of the plug-in area to be arranged at intervals along the first direction, on the one hand, it can meet the requirement that the multiple sub-plug areas are arranged at intervals along the first direction and plugged into the control component, so as to meet the usage requirement that the multiple ports of the control component are arranged along the first direction. On the other hand, it can reduce the difficulty of bending the circuit board, so as to reduce the manufacturing difficulty and assembly difficulty of the circuit board.

[0037] Secondly, embodiments of this application also provide an electrical device, including the battery device described above, wherein the battery device is used to provide electrical energy.

[0038] Thirdly, embodiments of this application also provide a circuit board, including a main body area, a connector, and a plug-in area; the main body area extends along a second direction and is used for electrical connection with a sampling component; the connection area extends along a first direction, and one end of the connection area is connected to one end of the main body area, the first direction being perpendicular to the second direction; the plug-in area is connected to the connection area and is used for plugging into a control component to electrically connect the circuit board and the control component.

[0039] In the above technical solution, by setting the main body area of ​​the circuit board as a structure extending along the second direction, and setting the connection area connecting the main body area and the plug-in area in the circuit board as a structure extending along the first direction, so that the main body area and the connection area are perpendicular to each other, the layout of the circuit board during use can be optimized, and the space occupied by the circuit board in the second direction can be saved.

[0040] In some embodiments, the circuit board is bent to form a bending region, the bending region connecting the main body region and the connection region.

[0041] In the above technical solution, the circuit board is bent to form a structure in which the main body area, the bending area and the connecting area are connected in sequence, so that the extension direction of the main body area is perpendicular to the extension direction of the connecting area. The circuit board with this structure only needs to be processed into a strip structure that extends along a straight trajectory before bending the circuit board. This reduces the difficulty of processing and forming the circuit board, thereby reducing the manufacturing difficulty of the circuit board. On the other hand, processing the circuit board into a strip structure during the production process reduces the waste of raw materials compared to directly processing the circuit board into an "L" shaped structure, which is conducive to reducing the manufacturing cost of the circuit board.

[0042] In some embodiments, the thickness direction of the main body region is parallel to a third direction, and in a projection plane perpendicular to the third direction, the orthographic projection portion of the connecting region overlaps with the orthographic projection portion of the main body region, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0043] In the above technical solution, by setting the connection area and the main body area to a structure in which the projections in the third direction overlap, the connection area and the main body area are stacked in the third direction after the circuit board is bent, thereby saving the space occupied by the circuit board in the third direction.

[0044] In some embodiments, the plug-in area includes a plurality of sub-plug-in areas, the connection area includes a plurality of sub-connection areas, the bending area includes a plurality of sub-bending areas, each of the sub-plug-in areas is connected to one of the sub-connection areas, and each of the sub-connection areas is connected to the main body area through one of the sub-bending areas; wherein, the plurality of sub-connection areas are stacked along the third direction.

[0045] In the above technical solution, by setting the plug-in area of ​​the circuit board as a structure in which multiple sub-plug-in areas cooperate with each other to plug into the control components, and setting the connection area and bending area of ​​the circuit board as corresponding multiple sub-connection areas and multiple sub-bending areas respectively, each sub-plug-in area is connected to a sub-bending area through a sub-connection area and a sub-bending area through a bending area, thereby improving the flexibility of the circuit board for inter-plugging with the control components to adapt to different control components, and improving the layout flexibility of the connection area to meet different assembly requirements. In particular, by setting the multiple sub-connection areas of the connection area as a structure stacked along a third direction, the multiple sub-connection areas of the connection area can also share part of the space in the second direction, which is beneficial to further save the space occupied by the connection area in the second direction.

[0046] In some embodiments, the main body region includes a main body portion and a plurality of connecting portions, the main body portion being electrically connected to the sampling member, and the plurality of connecting portions being spaced apart along the first direction and all connected to one end of the main body portion in the second direction; wherein, each of the sub-bending regions is connected to the main body portion through one of the connecting portions.

[0047] In the above technical solution, by setting the main body area as a main body and multiple connecting parts, and each connecting part connecting a bending area and the main body, the flexibility of each sub-connecting area to bend relative to the main body area can be improved while realizing the connection area to the main body area through the bending area. This makes it easier to bend the circuit board to form multiple sub-connecting areas stacked along a third direction, and can further reduce the forming difficulty of each sub-bending area. Attached Figure Description

[0048] 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.

[0049] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0050] Figure 2 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0051] Figure 3 A top view of a battery device (excluding the first housing body) provided for some embodiments of this application;

[0052] Figure 4 A schematic diagram of the circuit board assembly of the control unit and sampling assembly provided in some embodiments of this application;

[0053] Figure 5 This is a schematic diagram of the circuit board structure of the sampling assembly provided in some embodiments of this application;

[0054] Figure 6 for Figure 5 A magnified view of part A on the circuit board shown;

[0055] Figure 7 A schematic diagram of the circuit board of the sampling assembly provided in some embodiments of this application (before the circuit board is bent);

[0056] Figure 8 for Figure 7 A magnified view of part B on the circuit board shown;

[0057] Figure 9 Schematic diagram of the circuit board structure of the sampling assembly provided in some embodiments of this application;

[0058] Figure 10 for Figure 9 A magnified view of a portion of the circuit board at point C.

[0059] Icons: 1000 - Vehicle; 100 - Battery Unit; 10 - Housing; 11 - First Housing Body; 12 - Second Housing Body; 20 - Battery Cell Assembly; 21 - Battery Cell; 30 - Sampling Assembly; 30a - First Sampling Assembly; 30b - Second Sampling Assembly; 31 - Circuit Board; 311 - Main Body Area; 3111 - Main Body Section; 3112 - Connecting Section; 312 - Connecting Area; 3121 - Sub-Connecting Area; 3121a - First Connecting Segment; 3121b - Bending Segment; 3121c - Second Connecting Segment; 313 - Plug-in Area; 3131 - Sub-Plug-in Area; 314 - Bending Area; 3141 - Sub-Bending Area; 32 - Sampling Component; 40 - Control Component; 41 - Socket; 200 - Controller; 300 - Motor; X - First Direction; Y - Second Direction; Z - Third Direction. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0062] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive 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 three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0066] In this application, "multiple" means two or more (including two).

[0067] 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.

[0068] The battery cell can be a 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., and the embodiments of this application are not limited to this.

[0069] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits to some extent while allowing active ions to pass through.

[0070] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0071] In some embodiments, the separator is a separator membrane. The separator membrane can be of various types, and any known porous separator membrane with good chemical and mechanical stability can be selected.

[0072] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0073] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0074] In some implementations, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0075] In some implementations, the electrode assembly has a stacked structure.

[0076] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0077] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0078] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0079] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0080] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0081] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0082] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0083] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0084] As an example, a 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, but are not limited to, square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0090] As an example, the enclosure may include a first enclosure body and a second enclosure body. The first enclosure body and the second enclosure body are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first enclosure body may be a top cover or a bottom plate.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] Battery devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must simultaneously consider multiple design factors, such as performance parameters like energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, the reliability of the battery device must also be taken into account.

[0095] For a typical battery device, it usually includes a housing and multiple battery cells housed within the housing. In related technologies, to improve the safety of battery device use, a battery management system and a sampling assembly are generally installed inside the battery device. The battery management system includes control components for electrical connection with the sampling assembly. The control components correspond one-to-one with the sampling assembly and are plugged in to electrically connect the sampling assembly and the battery management system. The sampling assembly can collect and monitor information such as voltage or temperature of the battery cells during use, so as to obtain information on the usage status of the battery device. However, the existing battery management system and sampling assembly occupy a lot of space inside the housing, resulting in low internal space utilization of the battery device, which is not conducive to improving the energy density of the battery device. Moreover, the layout of the battery management system and sampling assembly inside the housing is relatively complex, making the sampling assembly prone to interference with other components inside the battery device, resulting in greater assembly difficulty and hindering the improvement of battery device production efficiency.

[0096] Based on the above considerations, in order to solve the problems of low energy density and low production efficiency of battery devices, this application provides a battery device, which includes a housing, multiple battery cell assemblies, a battery management system, and a sampling assembly. Multiple battery cell assemblies are arranged along a first direction and housed within the housing. Each battery cell assembly includes multiple battery cells stacked along a second direction. The battery management system includes a control unit disposed on one side of the battery cell assembly in the second direction. The sampling assembly includes a circuit board and a sampling component. The circuit board includes a main body area, a connection area, and a plug-in area. The main body area extends along the second direction and is disposed on one side of the battery cell assembly in a third direction. The connection area connects the main body area and the plug-in area, and extends along the first direction. The plug-in area is plugged into the control unit to electrically connect the sampling assembly and the control unit. The sampling component is electrically connected to the main body area and is configured to collect information from the battery cells. The first direction, the second direction, and the third direction are mutually perpendicular.

[0097] In this battery device structure, a sampling assembly is installed within the battery device. The sampling assembly includes a circuit board and a sampling component. The circuit board includes a main body area, a connection area, and a plug-in area connected in sequence. The sampling component is electrically connected to the main body area, and the plug-in area can be plugged into and cooperate with a control component to realize the electrical connection between the sampling component and the control component through the circuit board. This enables the battery management system to collect information from individual battery cells during use. The control component is located on one side of the battery cell assembly in a second direction. By setting the main body area to extend along the second direction and located on one side of the battery cell assembly in a third direction, and setting the connection area to extend along the first direction, it is easier to assemble the sampling assembly into the housing, which helps to reduce interference between the sampling assembly and other components. It also improves the flexibility of the plug-in cooperation between the control component and the circuit board, reducing the difficulty of plugging in the circuit board and the control component, thereby reducing the assembly difficulty of the battery device and improving the production efficiency of the battery device. On the other hand, it optimizes the layout of the circuit board and the control component in the housing and saves the space occupied by the circuit board in the second direction, thereby improving the internal space utilization of the battery device and increasing the energy density of the battery device.

[0098] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be composed of the battery device disclosed in this application. This helps alleviate the problems of high assembly difficulty and low internal space utilization of the battery device, thereby improving the energy density and production efficiency of the battery device.

[0099] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0100] 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.

[0101] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 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. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000. 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 supply power to the vehicle 1000; for example, the battery device 100 can serve as the operating power source or general power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0102] In some embodiments of this application, the battery device 100 can not only serve as the operating power or 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.

[0103] According to some embodiments of this application, please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 2 This is an exploded view of the structure of the battery device 100 provided in some embodiments of this application. Figure 3 This is a top view of a battery device 100 (excluding the first housing body 11) provided in some embodiments of this application. Figure 4 This is an assembly diagram of the control unit 40 and the circuit board 31 of the sampling assembly 30 provided in some embodiments of this application. Figure 5 This is a schematic diagram of the circuit board 31 of the sampling assembly 30 provided in some embodiments of this application. Figure 6 for Figure 5The diagram shows a partial enlarged view of point A on circuit board 31. This application provides a battery device 100, which includes a housing 10, a plurality of battery cell assemblies 20, a battery management system, and a sampling assembly 30. The plurality of battery cell assemblies 20 are arranged along a first direction X and housed within the housing 10. Each battery cell assembly 20 includes a plurality of battery cells 21 stacked along a second direction Y. The battery management system includes a control element 40, which is disposed on one side of each battery cell assembly 20 in the second direction Y. The sampling assembly 30 includes a circuit board 31 and a sampling component 32. The circuit board 31 includes a main body area 311, a connection area 312, and a plug-in area 313. The main body area 311 extends along the second direction Y and is disposed on one side of the battery cell assembly 20 in the third direction Z. The connection area 312 connects the main body area 311 and the plug-in area 313. The connection area 312 extends along the first direction X. The plug-in area 313 is plugged into the control component 40 to electrically connect the sampling assembly 30 and the control component 40. The sampling component 32 is electrically connected to the main body area 311. The sampling component 32 is configured to collect information from the battery cell 21. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0104] The housing 10 provides assembly space for the battery cell assembly 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which cover each other, and together define an assembly space for accommodating the battery cell assembly 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12.

[0105] Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as a cylinder, a cuboid, or a cube. For example, in... Figure 2 In the middle, the shape of box 10 is a cuboid.

[0106] In this embodiment of the application, the battery device 100 includes a plurality of battery cell assemblies 20 arranged along the first direction X, and each battery cell assembly 20 includes a plurality of battery cells 21 stacked along the second direction Y. That is, the plurality of battery cells 21 disposed in the housing 10 of the battery device 100 are arranged in rows and columns along the first direction X and the second direction Y.

[0107] Optionally, in the battery device 100, the multiple battery cell modules 20 can be connected in series, parallel, or in a hybrid configuration. A hybrid configuration means that the multiple battery cell modules 20 are connected in both series and parallel configurations. The multiple battery cell modules 20 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery cell modules 20 is housed within the housing 10.

[0108] For example, see Figure 2 and Figure 3 As shown, the battery device 100 includes six battery cell assemblies 20, which are arranged along a first direction X.

[0109] In the battery cell assembly 20, multiple battery cells 21 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 21 are connected in both series and parallel.

[0110] In some embodiments, the battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar for connecting multiple battery cells 21 to achieve electrical connection between the multiple battery cells 21.

[0111] Each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 21 can be in the form of a cuboid, cylinder, prism, or other shapes. For example, in... Figure 2 and Figure 3 In the middle, the battery cell 21 has a cuboid structure.

[0112] In this embodiment, the battery management system (not shown in the figure) mainly plays the role of managing and controlling the battery device 100. The control component 40 of the battery management system is a component that plugs into and cooperates with the sampling assembly 30 to realize the electrical connection between the battery management system and the sampling assembly 30. The control component 40 can also preprocess the information collected by the sampling assembly 30. Correspondingly, the control component 40 is the slave control board of the battery management system.

[0113] The control unit 40 has a socket 41, which is a region for interlocking with the circuit board 31 of the sampling assembly 30. The interlocking area 313 of the circuit board 31 is inserted into the socket 41 of the control unit 40 to realize the electrical connection between the circuit board 31 and the control unit 40, so as to realize the electrical connection between the sampling element 32 of the sampling assembly 30 and the control unit 40.

[0114] The control element 40 is disposed on one side of the battery cell assembly 20 in the second direction Y, that is, the control element 40 is located on one side of multiple battery cell assemblies 20 in the second direction Y. Optionally, in Figure 2 and Figure 3In the battery management system, there are multiple control units 40. Correspondingly, the battery device 100 is provided with multiple sampling assemblies 30. The number of sampling assemblies 30 is greater than the number of control units 40. Some of the multiple sampling assemblies 30 share a control unit 40, that is, some of the multiple sampling assemblies 30 are electrically connected to a control unit 40.

[0115] For example, see Figure 2 and Figure 3 As shown, the battery management system includes three control units 40, all of which are located on one side of the plurality of battery cell assemblies 21 in the second direction Y, and are arranged at intervals along the first direction X. Correspondingly, the battery device 100 is provided with six sampling assemblies 30, all of which are located on one side of the plurality of battery cells 21 in the third direction Z, and are arranged along the first direction X. Every two sampling assemblies 30 share one control unit 40. Of course, in other embodiments, the number of control units 40 provided by the battery management system can also be one, two, four, or five, etc. Similarly, two sampling assemblies 30 can share one control unit 40, or three, four, or five sampling assemblies 30 can share one control unit 40.

[0116] In this embodiment, the sampling assembly 30 includes a circuit board 31 and a sampling element 32. The sampling element 32 is used to detect and acquire information of the battery cell 21. Correspondingly, the circuit board 31 is used to electrically connect the sampling element 32 and the control element 40.

[0117] The number of sampling assemblies 30 within the housing 10 of the battery device 100 can be one or more. For example, in... Figure 3 In the battery device 100, six battery cell assemblies 20 are arranged along a first direction X. Each battery cell assembly 20 is associated with a sampling assembly 30, such that each sampling assembly 30 collects information from multiple battery cells 21 within a battery cell assembly 20. Alternatively, in other embodiments, the sampling assembly 30 may be associated with multiple battery cell assemblies 20, enabling it to collect information from multiple battery cells 21 within the multiple battery cell assemblies 20. For example, every two battery cell assemblies 20 may be associated with one sampling assembly 30.

[0118] For example, multiple sampling assemblies 30 are located on one side of the battery cell assembly 20 in the third direction Z.

[0119] Optionally, the structure of the sampling element 32 can be varied. For example, the sampling element 32 can be a temperature sensor disposed on the battery cell 21 to obtain the temperature information of the battery cell 21. The sampling element 32 can also be a fuse device electrically connected to the battery cell 21 to obtain the voltage information of the battery cell 21. Similarly, the number of sampling elements 32 provided in each sampling assembly 30 can be one or more.

[0120] The circuit board 31 includes a main body area 311, a connecting area 312, and a plug-in area 313. The main body area 311 is a component in the circuit board 31 used to load or connect the sampling component 32. The main body area 311 is a strip-shaped structure extending along the second direction Y, and the thickness direction of the main body area 311 is parallel to the third direction Z. The plug-in area 313 is a component in the circuit board 31 used to plug into and cooperate with the socket 41 of the control component 40. The connecting area 312 is a component in the circuit board 31 used to connect the main body area 311 and the plug-in area 313.

[0121] The main body region 311 extends along the second direction Y, and the connecting region 312 extends along the first direction X. That is, the main body region 311 and the connecting region 312 of the circuit board 31 are both located on one side of the battery cell assembly 20 in the third direction Z, and the extending directions of the main body region 311 and the extending directions of the connecting region 312 are perpendicular to each other. For example, one end of the connecting region 312 in the first direction X is connected to one end of the main body region 311 in the second direction Y, so that the main body region 311 and the connecting region 312 are connected to form an L-shaped structure.

[0122] In some embodiments, the battery device 100 may further include an insulating member disposed in the third direction Z between the sampling assembly 30 and the plurality of battery cells 21 to insulate and isolate the sampling assembly 30 and the battery cells 21, thereby reducing the risk of overlap between the sampling assembly 30 and the battery cells 21, thereby mitigating the phenomenon of internal short circuits in the battery device 100 during use and improving the reliability of the battery device 100.

[0123] The insulating component serves to insulate and isolate the battery cell 21 and the sampling assembly 30. The insulating component can be made of various materials, such as rubber, silicone, or plastic.

[0124] In this embodiment, a sampling assembly 30 is provided within the battery device 100. The sampling assembly 30 includes a circuit board 31 and a sampling component 32. The circuit board 31 includes a main body area 311, a connection area 312, and a plug-in area 313 connected in sequence. The sampling component 32 is electrically connected to the main body area 311, and the plug-in area 313 can be plugged into and cooperate with the control component 40 to realize that the sampling component 32 is electrically connected to the control component 40 through the circuit board 31, thereby enabling the battery management system to collect information of the battery cell 21 during use. The control component 40 is disposed on one side of the battery cell assembly 20 in the second direction Y. The main body area 311 is configured to extend along the second direction Y and be located on the side of the battery cell assembly 20 in the third direction Z. The structure, with the connection area 312 extending along the first direction X, facilitates the assembly of the sampling assembly 30 into the housing 10, reduces interference between the sampling assembly 30 and other components, and enhances the flexibility of the interlocking of the control component 40 and the circuit board 31, thereby reducing the difficulty of interlocking the circuit board 31 and the control component 40 and thus reducing the assembly difficulty of the battery device 100 and improving the production efficiency of the battery device 100. On the other hand, it optimizes the layout of the circuit board 31 and the control component 40 in the housing 10 and saves the space occupied by the circuit board 31 in the second direction Y, thereby improving the internal space utilization of the battery device 100 and increasing the energy density of the battery device 100.

[0125] According to some embodiments of this application, in conjunction with Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the battery device 100 may include a plurality of sampling assemblies 30, the main body regions 311 of the plurality of sampling assemblies 30 being arranged at intervals along a first direction X, and at least one control element 40 being inserted into and engaged with the insertion regions 313 of at least two sampling assemblies 30.

[0126] In this configuration, at least one control element 40 is plugged into the insertion area 313 of at least two sampling assemblies 30. That is, at least two sampling assemblies 30 share a single control element 40. If only one control element 40 is provided in the housing 10 of the battery device 100, then it is a structure in which one control element 40 is plugged into multiple sampling assemblies 30. If multiple control elements 40 are provided in the housing 10 of the battery device 100, then at least one of the multiple control elements 40 is plugged into two or more sampling assemblies 30.

[0127] For example, the battery device 100 is provided with a plurality of control elements 40 arranged at intervals along the first direction X, and each control element 40 is a structure that is plugged into two sampling assemblies 30, that is, one control element 40 is provided for every two sampling assemblies 30.

[0128] In this embodiment, the battery device 100 is provided with a plurality of sampling assemblies 30. The control unit 40 is plugged into the insertion area 313 of at least two sampling assemblies 30. The main body area 311 of the plurality of sampling assemblies 30 is arranged at intervals along the first direction X. This allows the plurality of sampling assemblies 30 to share a single control unit 40 while optimizing the layout of the circuit boards 31 of the plurality of sampling assemblies 30 within the housing 10. The connection area 312 and the main body area 311 of the circuit board 31 are respectively structures extending along the first direction X and the second direction Y. This reduces the difficulty of plugging the circuit boards 31 of the sampling assemblies 30 into the control unit 40 while allowing the plurality of sampling assemblies 30 to share a single control unit 40. It also saves the number of control units 40 in the battery device 100, which is beneficial for improving the internal space utilization of the battery device 100 and reducing the manufacturing cost of the battery device 100.

[0129] According to some embodiments of this application, in conjunction with Figure 3 , Figure 4 and Figure 5 As shown, along the first direction X, a plurality of sampling assemblies 30 include an adjacent first sampling assembly 30a and a second sampling assembly 30b. The connection area 312 of the first sampling assembly 30a extends from the main body area 311 toward the direction close to the second sampling assembly 30b. The connection area 312 of the second sampling assembly 30b extends from the main body area 311 toward the direction close to the first sampling assembly 30a. The insertion area 313 of the first sampling assembly 30a and the insertion area 313 of the second sampling assembly 30b are inserted and engaged with a control element 40.

[0130] The first sampling assembly 30a and the second sampling assembly 30b are two sampling assemblies 30 that are spaced apart and adjacent to each other in the first direction X.

[0131] The connection area 312 of the first sampling assembly 30a extends from the main body area 311 toward the direction close to the second sampling assembly 30b, and the connection area 312 of the second sampling assembly 30b extends from the main body area 311 toward the direction close to the first sampling assembly 30a. The insertion area 313 of the first sampling assembly 30a and the insertion area 313 of the second sampling assembly 30b are inserted and cooperated with a control element 40. That is, the connection area 312 of the first sampling assembly 30a and the connection area 312 of the second sampling assembly 30b, which are inserted and cooperated with the same control element 40, are configured to extend toward each other in the first direction X.

[0132] In this embodiment, by setting the connection area 312 of the first sampling assembly 30a and the connection area 312 of the second sampling assembly 30b, which are connected to the same control element 40, to extend towards each other in the first direction X, the difficulty of connecting the circuit boards 31 of the first sampling assembly 30a and the second sampling assembly 30b to the same control element 40 can be further reduced, thereby reducing the assembly difficulty of the battery device 100. On the other hand, the layout of the control element 40 and multiple sampling assemblies 30 in the housing 10 can be further optimized, which is beneficial to reducing the interference between the control element 40 and the sampling assembly 30 and other components.

[0133] In some embodiments, see Figure 3 As shown, in a projection plane perpendicular to the third direction Z, the orthographic projection of the main body region 311 of the first sampling assembly 30a and the orthographic projection of the main body region 311 of the second sampling assembly 30b are respectively located on both sides of the orthographic projection of the corresponding control member 40 in the first direction X. That is, the control member 40 that is plugged into and cooperates with the same group of first sampling assemblies 30a and second sampling assemblies 30b is a structure arranged in the first direction X between the main body regions 311 of the corresponding first sampling assembly 30a and the second sampling assembly 30b.

[0134] In this embodiment, by setting the orthographic projection of the main body area 311 of the first sampling assembly 30a and the main body area 311 of the second sampling assembly 30b in a projection plane perpendicular to the third direction Z, the structure is located on both sides of the orthographic projection of the corresponding control member 40 in the first direction X. This makes the control member 40 a structure arranged along the first direction X between the corresponding first sampling assembly 30a and the second sampling assembly 30b. This facilitates the assembly and connection of the control member 40 with the first sampling assembly 30a and the second sampling assembly 30b, and further reduces the assembly difficulty of the first sampling assembly 30a and the second sampling assembly 30b sharing a single control member 40, thereby reducing the assembly difficulty of the battery device 100.

[0135] According to some embodiments of this application, see Figure 3 As shown, the multiple sampling assemblies 30 may include multiple groups of sampling assemblies 30 arranged along the first direction X. Each group of sampling assemblies 30 includes a first sampling assembly 30a and a second sampling assembly 30b. Each group of sampling assemblies 30 is electrically connected to a control element 40. That is, the multiple sampling assemblies 30 arranged along the first direction X include multiple first sampling assemblies 30a and multiple second sampling assemblies 30b, and multiple control elements 40 are provided inside the housing 10 of the battery device 100. The first sampling assemblies 30a, second sampling assemblies 30b and control elements 40 are arranged in a one-to-one correspondence, and the first sampling assemblies 30a and second sampling assemblies 30b in the same group are plugged into the same control element 40.

[0136] For example, the battery device 100 is provided with three sampling assemblies 30, which are arranged along a first direction X. Each sampling assembly 30 includes a first sampling assembly 30a and a second sampling assembly 30b arranged along the first direction X, so that the first sampling assembly 30a and the second sampling assembly 30b among the plurality of sampling assemblies 30 are arranged alternately and at intervals along the first direction X.

[0137] In this embodiment, by configuring the multiple sampling assemblies 30 within the battery device 100 into a structure including multiple sets of first sampling assemblies 30a and second sampling assemblies 30b arranged along the first direction X, it is possible to enable every two sampling assemblies 30 to share one control unit 40, thereby further saving the number of control units 40 within the battery device 100, which is beneficial to further improving the internal space utilization of the battery device 100 and further reducing the manufacturing cost of the battery device 100.

[0138] According to some embodiments of this application, see Figure 3 As shown, in a projection plane perpendicular to the third direction Z, the orthographic projections of the control unit 40 and the main body area 311 of the sampling assembly 30 are arranged at intervals along the first direction X. That is, in the first direction X, the control unit 40 and the main body area 311 of the sampling assembly 30 are arranged at intervals.

[0139] In this embodiment, by setting the orthographic projection of the main body area 311 of the control component 40 and the sampling assembly 30 in a projection plane perpendicular to the third direction Z as a structure arranged at intervals along the first direction X, the main body area 311 of the control component 40 and the sampling assembly 30 is staggered in the second direction Y. This facilitates the interlocking and cooperation between the control component 40 and the circuit board 31 with an "L" shape, reducing the assembly difficulty between the circuit board 31 and the control component 40. On the other hand, it can reduce the interference between the main body area 311 and the control component 40, and further optimize the layout planning of the control component 40 and the main body area 311 in the housing 10, so as to reduce the phenomenon that the layout of the control component 40 is affected by the layout of the main body area 311 of the circuit board 31.

[0140] According to some embodiments of this application, refer to Figure 4 , Figure 5 and Figure 6 Please refer to further details. Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the circuit board 31 of the sampling assembly 30 provided in some embodiments of this application (before the circuit board 31 is bent). Figure 8 for Figure 7The diagram shows a partial enlarged view of point B on the circuit board 31. The circuit board 31 is bent to form a bending region 314, which connects the main body region 311 and the connecting region 312. In other words, the circuit board 31 forms the mutually perpendicular main body region 311 and connecting region 312 by bending.

[0141] For example, see Figure 7 and Figure 8 As shown, before the circuit board 31 is bent, the main body area 311 and the connection area 312 of the circuit board 31 are both structures extending along the second direction Y. By bending the circuit board 31, and the extension direction of the generatrix of the inner surface of the bending area 314 is at a 45-degree angle with both the first direction X and the second direction Y, the circuit board 31 is bent to form a connection area 312 extending along the first direction X.

[0142] Of course, in other embodiments, the circuit board 31 may also be a circuit board 31 that is directly processed into an "L" shaped structure, so that the circuit board 31 has a connection area 312 extending along the first direction X and a main body area 311 extending along the second direction Y.

[0143] In this embodiment, the circuit board 31 is bent to form a structure in which the main body area 311, the bending area 314 and the connecting area 312 are connected in sequence, so that the extension direction of the main body area 311 is perpendicular to the extension direction of the connecting area 312. The circuit board 31 with this structure only needs to be processed into a strip structure extending along a straight trajectory before bending the circuit board 31. This reduces the processing and forming difficulty of the circuit board 31, thereby reducing the manufacturing difficulty of the circuit board 31. On the other hand, the circuit board 31 processed into a strip structure during the production process reduces the waste of raw materials compared to the circuit board 31 directly processed into an "L" shaped structure, which is conducive to reducing the manufacturing cost of the circuit board 31.

[0144] In some embodiments, see Figure 4 , Figure 5 and Figure 6 As shown, the thickness direction of the main body region 311 is parallel to the third direction Z. In the projection plane perpendicular to the third direction Z, the orthographic projection of the connecting region 312 overlaps with the orthographic projection of the main body region 311.

[0145] In the projection plane perpendicular to the third direction Z, the orthographic projection of the connection area 312 overlaps with the orthographic projection of the main body area 311. That is, after the circuit board 31 is bent, the connection area 312 and the main body area 311 are arranged in a stacked structure along the third direction Z, and the projections of the connection area 312 and the main body area 311 on the third direction Z overlap, so that the thickness direction of the connection area 312 is also parallel to the third direction Z.

[0146] In this embodiment, by setting the connection area 312 and the main body area 311 to a structure in which the projections on the third direction Z partially overlap, the connection area 312 and the main body area 311 are stacked on the third direction Z after the circuit board 31 is bent. This saves the space occupied by the circuit board 31 on the third direction Z, reduces the difficulty of assembling the circuit board 31 into the housing 10, and optimizes the layout of the circuit board 31 in the housing 10.

[0147] According to some embodiments of this application, in conjunction with Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the plug-in area 313 may include multiple sub-plug-in areas 3131, the connection area 312 may include multiple sub-connection areas 3121, and the bending area 314 may include multiple sub-bending areas 3141. Each sub-plug-in area 3131 is connected to a sub-connection area 3121, and each sub-connection area 3121 is connected to the main body area 311 through a sub-bending area 3141. The multiple sub-connection areas 3121 are stacked along the third direction Z layer.

[0148] Among them, the multiple sub-plug areas 3131 are structures formed by dividing the plug area 313 of a sampling assembly 30. Correspondingly, after the multiple sub-plug areas 3131 are plugged into the control component 40, they can cooperate to realize the electrical connection between the circuit board 31 and the control component 40.

[0149] The connection area 312 may include multiple sub-connection areas 3121, that is, the connection area 312 of the circuit board 31 is divided to form multiple sub-connection areas 3121 that correspond one-to-one with the sub-plug area 3131, so that each sub-plug area 3131 is connected to a sub-connection area 3121.

[0150] Each sub-connection area 3121 is connected to the main body area 311 through a sub-bending area 3141. That is, the circuit board 31 is bent to form multiple sub-bending areas 3141, and correspondingly forms multiple sub-connection areas 3121 extending along the first direction X, so that the multiple sub-connection areas 3121 and the multiple sub-plug areas 3131 are arranged independently of each other.

[0151] Multiple sub-connection areas 3121 are stacked along the third direction Z, that is, the multiple sub-connection areas 3121 formed after the circuit board 31 is bent are arranged in a stacked manner along the third direction Z.

[0152] For example, combined Figure 6 and Figure 8As shown, the circuit board 31 is divided into two sub-plug areas 3131, two sub-connection areas 3121 and two sub-bending areas 3141. Each sub-plug area 3131 is connected to the main body area 311 in sequence through a sub-connection area 3121 and a sub-bending area 3141. Both sub-connection areas 3121 extend along the first direction X, and the two sub-connection areas 3121 are stacked along the third direction Z.

[0153] In this embodiment, by configuring the insertion area 313 of the circuit board 31 as a structure in which multiple sub-insertion areas 3131 cooperate with each other to insert into the control component 40, and configuring the connection area 312 and bending area 314 of the circuit board 31 as corresponding multiple sub-connection areas 3121 and multiple sub-bending areas 3141, such that each sub-insertion area 3131 is connected to a sub-bending area 3141 through a sub-connection area 3121, and each sub-connection area 3121 is connected to the main body area 311 through a bending area 314, the connection between the circuit board 31 and the control component 40 can be improved. The flexibility of the interlocking and mating of the 0 components allows for adaptation to different control components 40, and improves the layout flexibility of the connection area 312 to meet different assembly requirements. In particular, by setting the multiple sub-connection areas 3121 of the connection area 312 to be stacked along the third direction Z, the multiple sub-connection areas 3121 of the connection area 312 can share part of the space in the second direction Y, which is beneficial to further save the space occupied by the connection area 312 in the second direction Y, thereby improving the internal space utilization of the battery device 100 and reducing the interference between the connection area 312 and other components.

[0154] According to some embodiments of this application, in conjunction with Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the main body region 311 may include a main body portion 3111 and a plurality of connecting portions 3112. The main body portion 3111 is electrically connected to the sampling member 32. The plurality of connecting portions 3112 are arranged at intervals along the first direction X and are all connected to one end of the main body portion 3111 in the second direction Y. Each sub-bending region 3141 is connected to the main body portion 3111 through a connecting portion 3112.

[0155] Among them, a plurality of connecting portions 3112 are arranged at intervals along the first direction X and are all connected to one end of the main body portion 3111 in the second direction Y. That is, the end of the main body portion 311 in the second direction Y for connecting with the sub-bending area 3141 is divided to form a plurality of connecting portions 3112 corresponding to the sub-bending area 3141. The plurality of connecting portions 3112 are arranged at intervals along the first direction X, and each connecting portion 3112 connects a sub-bending area 3141 and the main body portion 3111.

[0156] For example, in Figure 6 In the middle, there are two sub-connection areas 3121 and two sub-bending areas 3141. Correspondingly, the main body area 311 forms two connecting parts 3112, which connect the main body area 3111 and the corresponding sub-bending area 3141 in the first direction X.

[0157] In this embodiment, by setting the main body area 311 as a main body portion 3111 and a plurality of connecting portions 3112, and each connecting portion 3112 connecting a bending area 314 and the main body portion 3111, the flexibility of each sub-connecting area 3121 bending relative to the main body area 311 can be further improved while realizing the connection area 312 being connected to the main body area 311 through the bending area 314. This facilitates bending the circuit board 31 to form a plurality of sub-connecting areas 3121 stacked along the third direction Z, and further reduces the molding difficulty of each sub-bending area 3141.

[0158] According to some embodiments of this application, see Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the control component 40 has a socket 41 on the side facing the battery cell assembly 20 in the second direction Y. A sub-plug area 3131 is inserted into the socket 41 along the second direction Y to electrically connect the sampling assembly 30 and the control component 40. Along the second direction Y, the sub-plug area 3131 is connected to the corresponding sub-connection area 3121 on the side opposite to the main body area 311.

[0159] Among them, multiple sub-plug areas 3131 are connected to the corresponding sub-connection area 3121 on the side opposite to the main body area 311 in the second direction Y.

[0160] In this embodiment, by setting the socket 41 on the side of the control member 40 facing the battery cell assembly 20 in the second direction Y, and setting each sub-plug area 3131 on the side of the corresponding sub-connection area 3121 facing away from the main body area 311 in the second direction Y, the sub-plug area 3131 can be inserted into the socket 41 of the control member 40 along the second direction Y, thereby reducing the difficulty of the plug area 313 of the circuit board 31 and the control member 40 to plug and cooperate with each other, which is beneficial to improving the assembly efficiency of the battery device 100.

[0161] According to some embodiments of this application, see Figure 4 , Figure 5 and Figure 6 As shown, multiple sub-plug areas 3131 are stacked along the third direction Z layer.

[0162] Optionally, the plurality of sub-plug areas 3131 can be a structure that completely overlaps along the third direction Z, or a structure in which every two adjacent sub-plug areas 3131 in the third direction Z partially overlap. For example, in Figure 6 In the middle, the multiple sub-plug areas 3131 are a structure that completely overlaps along the third direction Z.

[0163] In this embodiment, by setting the multiple sub-plug areas 3131 of the plug area 313 to be stacked along the third direction Z, on the one hand, it can meet the requirement that the multiple sub-plug areas 3131 are stacked along the third direction Z and plugged into the control member 40, so as to meet the usage requirement that the multiple ports 41 of the control member 40 are arranged along the third direction Z. On the other hand, it can realize that the multiple sub-plug areas 3131 of the plug area 313 share part of the space in the first direction X, which is beneficial to save the space occupied by the plug area 313 in the first direction X, so as to improve the internal space utilization of the battery device 100.

[0164] In some embodiments, see Figure 6 As shown, in the projection plane perpendicular to the third direction Z, the orthographic projections of multiple sub-plug areas 3131 form an overlapping area, and at least a portion of the orthographic projection of each sub-plug area 3131 is located in the overlapping area. That is, any one of the multiple sub-plug areas 3131 overlaps with other sub-plug areas 3131 in the third direction Z.

[0165] In this embodiment, the orthographic projections of multiple sub-plug areas 3131 on the third direction Z form an overlapping area, and at least a portion of the orthographic projection of each sub-plug area 3131 is located within the overlapping area, so that at least a portion of each sub-plug area 3131 is a structure that is stacked with other sub-plug areas 3131 on the third direction Z, thereby further saving the space occupied by the plug area 313 on the first direction X, so as to further improve the internal space utilization of the battery device 100.

[0166] In some embodiments, please continue to see Figure 6 As shown, in the projection plane perpendicular to the third direction Z, the orthographic projections of multiple sub-interlocking areas 3131 completely overlap.

[0167] In this embodiment, by setting the projections of the multiple sub-plug areas 3131 on the third direction Z to be completely overlapping, it is possible to facilitate the insertion and cooperation of the multiple sub-plug areas 3131 with the control component 40, thereby reducing the assembly difficulty between the multiple sub-plug areas 3131 and the control component 40 and reducing the manufacturing difficulty of the control component 40. On the other hand, it can further save the space occupied by the plug area 313 on the first direction X, thereby further improving the internal space utilization of the battery device 100.

[0168] According to some embodiments of this application, in conjunction with Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, at least one sub-connecting region 3121 is bent to form a first connecting segment 3121a, a bent segment 3121b, and a second connecting segment 3121c that are connected in sequence. The first connecting segment 3121a extends along a first direction X and connects to the sub-benting region 3141. The bent segment 3121b is located at the end of the first connecting segment 3121a away from the sub-benting region 3141 in the first direction X. The sub-plugging region 3131 is connected to the second connecting segment 3121c. Along a third direction Z, the first connecting segment 3121a and the second connecting segment 3121c are arranged opposite to each other.

[0169] The bending segment 3121b is located at the end of the first connecting segment 3121a away from the sub-bending area 3141 in the first direction X. That is, the two ends of the first connecting segment 3121a of the sub-connecting area 3121 in the first direction X are respectively connected to a sub-bending area 3141 and the corresponding bending segment 3121b.

[0170] Along the third direction Z, the first connecting segment 3121a and the second connecting segment 3121c are arranged opposite to each other. That is, after the sub-connecting area 3121 is bent to form the first connecting segment 3121a, the bent segment 3121b and the second connecting segment 3121c connected in sequence, the first connecting segment 3121a and the second connecting segment 3121c are stacked along the third direction Z. For example, the first connecting segment 3121a and the second connecting segment 3121c both extend along the first direction X. Correspondingly, the sub-plug area 3131 is connected to the side of the second connecting segment 3121c of the corresponding sub-connecting area 3121 that is away from the main body area 311 in the third direction Z.

[0171] For example, the generatrix of the inner surface of the bent segment 3121b is a structure that extends along the second direction Y.

[0172] In this embodiment, by setting at least one sub-connection area 3121 to a structure formed by bending to form a first connection segment 3121a, a bent segment 3121b, and a second connection segment 3121c connected in sequence, and the bent segment 3121b is located at the end of the first connection segment 3121a away from the sub-bent area 3141 in the first direction X, and the first connection segment 3121a and the second connection segment 3121c are arranged opposite to each other in the third direction Z, the sub-plug area 3131 connected to the sub-connection area 3121 can be stacked with other sub-plug areas 3131 in the third direction Z by bending the sub-connection area 3121. On the one hand, this reduces the difficulty of stacking multiple sub-plug areas 3131 in the third direction Z, and on the other hand, it can meet different plugging requirements by bending the sub-connection area 3121 in different ways or without bending, thereby improving the applicability of the circuit board 31.

[0173] Of course, the structure of the circuit board 31 of the sampling assembly 30 is not limited to this. In some embodiments, the circuit board 31 can also have other structures, for example, see reference. Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the circuit board 31 of the sampling assembly 30 provided in some embodiments of this application. Figure 10 for Figure 9 The enlarged view of part C of the circuit board 31 shown shows that multiple sub-plug areas 3131 are arranged at intervals along the first direction X in a projection plane perpendicular to the third direction Z.

[0174] Among them, multiple sub-plug areas 3131 are connected to the corresponding sub-connection area 3121 on the side opposite to the main body area 311 in the second direction Y, and the multiple sub-plug areas 3131 are spaced apart along the first direction X.

[0175] In this embodiment, by setting the multiple sub-plug areas 3131 of the plug area 313 to be arranged at intervals along the first direction X, on the one hand, it can meet the requirement that the multiple sub-plug areas 3131 are arranged at intervals along the first direction X and plugged into the control component 40, so as to meet the usage requirement that the multiple sockets 41 of the control component 40 are arranged along the first direction X. On the other hand, it can reduce the difficulty of bending the circuit board 31, so as to reduce the manufacturing difficulty and assembly difficulty of the circuit board 31.

[0176] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 of any of the above schemes, and the battery device 100 is used to provide electrical energy to the electrical device.

[0177] The electrical device can be any of the aforementioned devices or systems that utilize battery device 100.

[0178] According to some embodiments of this application, refer to Figure 4 , Figure 5 and Figure 6 As shown, this application also provides a circuit board 31, which includes a main body region 311, a connector, and a mating region 313. The main body region 311 extends along a second direction Y and is used for electrical connection with a sampling component 32. A connection region 312 extends along a first direction X, and one end of the connection region 312 is connected to one end of the main body region 311, wherein the first direction X is perpendicular to the second direction Y. The mating region 313 is connected to the connection region 312 and is used for mating with a control component 40 to electrically connect the circuit board 31 and the control component 40.

[0179] It should be noted that the specific structure of the circuit board 31 provided in this application embodiment can be found in the aforementioned structural description of the circuit board 31, and will not be repeated here.

[0180] In this embodiment, by setting the main body area 311 of the circuit board 31 to extend along the second direction Y, and setting the connection area 312 of the circuit board 31 connecting the main body area 311 and the insertion area 313 to extend along the first direction X, the main body area 311 and the connection area 312 are perpendicular to each other, thereby optimizing the layout of the circuit board 31 during use and saving the space occupied by the circuit board 31 in the second direction Y.

[0181] According to some embodiments of this application, please continue to refer to Figure 4 , Figure 5 and Figure 6 As shown, the circuit board 31 is bent to form a bending area 314, which connects the main body area 311 and the connecting area 312.

[0182] In this embodiment, the circuit board 31 is bent to form a structure in which the main body area 311, the bending area 314 and the connecting area 312 are connected in sequence, so that the extension direction of the main body area 311 is perpendicular to the extension direction of the connecting area 312. The circuit board 31 with this structure only needs to be processed into a strip structure extending along a straight trajectory before bending the circuit board 31. This reduces the processing and forming difficulty of the circuit board 31, thereby reducing the manufacturing difficulty of the circuit board 31. On the other hand, the circuit board 31 processed into a strip structure during the production process reduces the waste of raw materials compared to the circuit board 31 directly processed into an "L" shaped structure, which is conducive to reducing the manufacturing cost of the circuit board 31.

[0183] In some embodiments, see Figure 5 and Figure 6 As shown, the thickness direction of the main body region 311 is parallel to the third direction Z. In the projection plane perpendicular to the third direction Z, the orthographic projection of the connecting region 312 overlaps with the orthographic projection of the main body region 311. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0184] In this embodiment, by setting the connection area 312 and the main body area 311 to a structure in which the projections on the third direction Z partially overlap, the connection area 312 and the main body area 311 are stacked on the third direction Z after the circuit board 31 is bent, thereby saving the space occupied by the circuit board 31 on the third direction Z.

[0185] According to some embodiments of this application, in conjunction with Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the plug-in area 313 includes multiple sub-plug-in areas 3131, the connection area 312 includes multiple sub-connection areas 3121, and the bending area 314 includes multiple sub-bending areas 3141. Each sub-plug-in area 3131 is connected to a sub-connection area 3121, and each sub-connection area 3121 is connected to the main body area 311 through a sub-bending area 3141. The multiple sub-connection areas 3121 are stacked along the third direction Z layer.

[0186] In this embodiment, the insertion area 313 of the circuit board 31 is configured as a structure in which multiple sub-insertion areas 3131 cooperate with each other to insert into the control component 40, and the connection area 312 and bending area 314 of the circuit board 31 are respectively configured as multiple corresponding sub-connection areas 3121 and multiple sub-bending areas 3141, such that each sub-insertion area 3131 is connected to a sub-bending area 3141 through a sub-connection area 3121, and each sub-connection area 3121 is connected to the main body area 311 through a bending area 314. The structure improves the flexibility of the circuit board 31 in interlocking with the control component 40 to accommodate different control components 40, and also improves the layout flexibility of the connection area 312 to meet different assembly requirements. In particular, by setting the multiple sub-connection areas 3121 of the connection area 312 to be stacked along the third direction Z, the multiple sub-connection areas 3121 of the connection area 312 can share part of the space in the second direction Y, which is beneficial to further save the space occupied by the connection area 312 in the second direction Y.

[0187] Based on some embodiments of this application, please continue to combine Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the main body region 311 includes a main body portion 3111 and a plurality of connecting portions 3112. The main body portion 3111 is used for electrical connection with the sampling member 32. The plurality of connecting portions 3112 are arranged at intervals along the first direction X and are all connected to one end of the main body portion 3111 in the second direction Y. Each sub-bending region 3141 is connected to the main body portion 3111 through a connecting portion 3112.

[0188] In this embodiment, by setting the main body area 311 as a main body portion 3111 and a plurality of connecting portions 3112, and each connecting portion 3112 connecting a bending area 314 and the main body portion 3111, the flexibility of each sub-connecting area 3121 bending relative to the main body area 311 can be further improved while realizing the connection area 312 being connected to the main body area 311 through the bending area 314. This facilitates bending the circuit board 31 to form a plurality of sub-connecting areas 3121 stacked along the third direction Z, and further reduces the molding difficulty of each sub-bending area 3141.

[0189] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0190] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Box; Multiple battery cell assemblies are arranged along a first direction and housed within the housing, wherein the battery cell assembly includes multiple battery cells stacked along a second direction. A battery management system includes a control unit disposed on one side of the battery cell assembly in the second direction; as well as A sampling assembly includes a circuit board and a sampling component. The circuit board includes a main body area, a connection area, and a plug-in area. The main body area extends along a second direction and is disposed on one side of the battery cell assembly in a third direction. The connection area connects the main body area and the plug-in area. The connection area extends along a first direction. The plug-in area is plugged into a control component to electrically connect the sampling assembly and the control component. The sampling component is electrically connected to the main body area. The sampling component is configured to collect information from the battery cell. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that, The battery device includes a plurality of the sampling assemblies, and the main body regions of the plurality of sampling assemblies are arranged at intervals along the first direction; In this configuration, at least one of the control components is plugged into the insertion area of ​​at least two of the sampling assemblies.

3. The battery device according to claim 2, characterized in that, Along the first direction, the plurality of sampling assemblies include an adjacent first sampling assembly and a second sampling assembly, wherein the connection area of ​​the first sampling assembly extends from the main body area toward the second sampling assembly, and the connection area of ​​the second sampling assembly extends from the main body area toward the first sampling assembly, and the plug-in area of ​​the first sampling assembly and the plug-in area of ​​the second sampling assembly are plugged into a control element.

4. The battery device according to claim 3, characterized in that, In a projection plane perpendicular to the third direction, the orthographic projection of the main body area of ​​the first sampling assembly and the orthographic projection of the main body area of ​​the second sampling assembly are respectively located on both sides of the orthographic projection of the corresponding control element in the first direction.

5. The battery device according to claim 3, characterized in that, The plurality of sampling assemblies include multiple groups of sampling assemblies arranged along the first direction, each group of sampling assemblies including the first sampling assembly and the second sampling assembly, and each group of sampling assemblies being electrically connected to one of the control components.

6. The battery device according to claim 1, characterized in that, In a projection plane perpendicular to the third direction, the orthographic projections of the control element and the main body area of ​​the sampling assembly are arranged at intervals along the first direction.

7. The battery device according to any one of claims 1-6, characterized in that, The circuit board is bent to form a bending area, which connects the main body area and the connection area.

8. The battery device according to claim 7, characterized in that, The thickness direction of the main body area is parallel to the third direction, and in the projection plane perpendicular to the third direction, the orthographic projection of the connecting area overlaps with the orthographic projection of the main body area.

9. The battery device according to claim 8, characterized in that, The plug-in area includes multiple sub-plug-in areas, the connection area includes multiple sub-connection areas, and the bending area includes multiple sub-bending areas. Each sub-plug-in area is connected to one sub-connection area, and each sub-connection area is connected to the main body area through one sub-bending area. The multiple sub-connection regions are stacked along the third direction.

10. The battery device according to claim 9, characterized in that, The main body area includes a main body portion and a plurality of connecting portions. The main body portion is electrically connected to the sampling element. The plurality of connecting portions are arranged at intervals along the first direction and are all connected to one end of the main body portion in the second direction. Each of the sub-bending areas is connected to the main body through a connecting portion.

11. The battery device according to claim 9, characterized in that, The control component has a socket on the side facing the battery cell assembly in the second direction, and the sub-plug area is inserted into the socket along the second direction to electrically connect the sampling assembly and the control component; Along the second direction, the sub-plug area is connected to the side of the corresponding sub-connection area opposite to the main body area.

12. The battery device according to claim 11, characterized in that, The multiple sub-plug areas are stacked along the third direction.

13. The battery device according to claim 12, characterized in that, In a projection plane perpendicular to the third direction, the orthographic projections of the plurality of sub-plug areas form an overlapping area, and at least a portion of the orthographic projection of each sub-plug area is located in the overlapping area.

14. The battery device according to claim 13, characterized in that, In a projection plane perpendicular to the third direction, the orthographic projections of the plurality of sub-plug areas completely overlap.

15. The battery device according to claim 12, characterized in that, At least one of the sub-connecting regions is bent to form a first connecting segment, a bent segment, and a second connecting segment connected in sequence. The first connecting segment extends along the first direction and is connected to the sub-bent segment. The bent segment is located at the end of the first connecting segment away from the sub-bent segment in the first direction. The sub-plugging region is connected to the second connecting segment. Along the third direction, the first connection segment and the second connection segment are arranged opposite to each other.

16. The battery device according to claim 11, characterized in that, In a projection plane perpendicular to the third direction, a plurality of sub-plug areas are arranged at intervals along the first direction.

17. An electrical device, characterized in that, Includes a battery device as described in any one of claims 1-16, the battery device being used to provide electrical energy.

18. A circuit board, characterized in that, include: A main body region extending along a second direction, the main body region being used for electrical connection with a sampling element; A connecting region extending along a first direction, one end of which is connected to one end of the main body region, wherein the first direction is perpendicular to the second direction; and A plug-in area, connected to the connection area, is used to plug into and mate with a control component to electrically connect the circuit board and the control component.

19. The circuit board according to claim 18, characterized in that, The circuit board is bent to form a bending area, which connects the main body area and the connection area.

20. The circuit board according to claim 19, characterized in that, The thickness direction of the main body area is parallel to the third direction. In the projection plane perpendicular to the third direction, the orthographic projection of the connecting area overlaps with the orthographic projection of the main body area. The first direction, the second direction, and the third direction are perpendicular to each other.

21. The circuit board according to claim 20, characterized in that, The plug-in area includes multiple sub-plug-in areas, the connection area includes multiple sub-connection areas, and the bending area includes multiple sub-bending areas. Each sub-plug-in area is connected to one sub-connection area, and each sub-connection area is connected to the main body area through one sub-bending area. The multiple sub-connection regions are stacked along the third direction.

22. The circuit board according to claim 21, characterized in that, The main body area includes a main body portion and a plurality of connecting portions. The main body portion is used to be electrically connected to the sampling element. The plurality of connecting portions are arranged at intervals along the first direction and are all connected to one end of the main body portion in the second direction. Each of the sub-bending areas is connected to the main body through a connecting portion.

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