Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, the battery device comprises a battery monomer assembly, a confluence component, a sampling assembly and a first insulating part, the battery monomer assembly comprises at least two battery monomers, and the at least two battery monomers are arranged along a first direction; the bus-bar component is arranged on one side of the battery monomer assembly and comprises a plurality of bus-bars, and each bus-bar is electrically connected with at least one battery monomer; the sampling assembly is arranged on one side of the battery monomer assembly, the sampling assembly comprises a first circuit board and a second circuit board, the first circuit board extends along a first direction and is electrically connected with the plurality of busbars, the second circuit board is electrically connected with the first circuit board, and the second circuit board is provided with a wireless communication unit; the first insulating part is arranged between the sampling assembly and the battery monomer assembly, the first insulating part is provided with a containing groove, and at least part of the second circuit board is located in the containing groove. According to the embodiment of the invention, the reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] However, the current data collection method of CCS (Cells Contact System, integrated busbar) in batteries has low reliability, which affects the reliability of battery devices. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical appliance that can improve the reliability of the battery device.

[0005] In a first aspect, this application proposes a battery device, including a battery cell assembly, a busbar component, a sampling component, and a first insulating member. The battery cell assembly includes at least two battery cells arranged along a first direction. The busbar component is disposed on one side of the battery cell assembly and includes multiple busbars, each busbar being electrically connected to at least one battery cell. The sampling component is disposed on one side of the battery cell assembly and includes a first circuit board and a second circuit board. The first circuit board extends along the first direction and is electrically connected to the multiple busbars, and the second circuit board is electrically connected to the first circuit board and has a wireless communication unit. The first insulating member is disposed between the sampling component and the battery cell assembly and has a receiving groove, with at least a portion of the second circuit board located within the receiving groove.

[0006] In this embodiment, the battery device includes a battery cell assembly, a busbar component, and a sampling component. By setting up the sampling component, the first circuit board is directly connected to the busbar to collect signals, and then the signals are wirelessly transmitted via the second circuit board. This avoids the design difficulties caused by complex wiring harnesses and eliminates the need to plan the wiring harness layout. In the production and assembly process, it reduces the insertion and fixing of wiring harnesses, improves assembly efficiency, and reduces quality problems caused by poor wiring harness connections. At the same time, it eliminates complex wiring harnesses, saving internal space in the battery pack and preventing the wiring harness from occupying space and compressing the effective volume of the battery pack. This allows the battery pack to integrate more battery cells or optimize the layout of other components within a limited space. By setting a receiving groove on the first insulating component to partially embed the second circuit board, it optimizes space utilization and effectively prevents the risk of short circuits between the battery cells and the sampling circuit through insulation. The positioning function of the receiving groove ensures that the second circuit board remains stable under vibration or shock environments, improving the reliability of wireless communication. This, in turn, improves the overall performance and reliability of the battery device.

[0007] In some embodiments, the first circuit board includes two first portions spaced apart along a second direction, each first portion being electrically connected to a corresponding busbar, a receiving space being formed between the two first portions, at least a portion of the second circuit board being located within the receiving space, and the second direction intersecting the first direction.

[0008] In these embodiments, the space within the battery device is fully utilized to efficiently integrate sampling and communication functions within a limited space.

[0009] In some embodiments, the first circuit board is provided with one of a connector socket and a connector plug, and the second circuit board is provided with the other of a connector socket and a connector plug, wherein the connector socket and the connector plug are plugged in to make the first circuit board and the second circuit board electrically connected.

[0010] In these embodiments, by setting mutually matching connection sockets and connection plugs on the first circuit board and the second circuit board respectively, a simple and reliable plug-in electrical connection between the two is achieved, which not only ensures the reliability of signal transmission, but also greatly improves assembly efficiency.

[0011] In some embodiments, the first circuit board further includes a second portion connected between the two first portions, the second portion being located on one side of the second circuit board in the first direction.

[0012] In these embodiments, by providing a second portion to connect the two first portions on the first circuit board, the first circuit board is made into a single structure. This design enhances the structural integrity and stability of the first circuit board itself. Simultaneously, signal transmission between the two first portions and the second circuit board can be achieved through only one connector, reducing the number of connectors between the first and second circuit boards.

[0013] In some embodiments, the connector is located on one of the two first portions.

[0014] In these embodiments, the connector is integrated into one of the first components, simplifying the mating process between the first and second circuit boards and enabling stable plugging and unplugging without the need for additional adapters. This reduces assembly complexity, improves production efficiency, and ensures reliable signal transmission.

[0015] In some embodiments, the first insulating member includes a base plate and ribs that protrude from the base plate in a direction away from the battery cell assembly, the ribs and the base plate forming a receiving groove.

[0016] In these embodiments, the base plate provides support for the sampling components and the ribs. The enclosure structure formed by the ribs provides precise mechanical positioning for the second circuit board, preventing assembly misalignment. The ribs also enhance the structural strength of the first insulator, enabling it to better withstand external stress while providing insulation and ensuring structural stability.

[0017] In some embodiments, the rib has multiple cuts spaced apart on the periphery of the second circuit board, and the first insulating member further includes an elastic locking portion, at least part of which is located within the cuts, and the elastic locking portion is deformed to move away from the receiving groove.

[0018] In these embodiments, the cut provides an installation position and deformation space for the resilient locking part, allowing it to deform flexibly as needed to lock or unlock the second circuit board. This enhances the connection stability and reliability between the first insulator and the second circuit board, facilitates the installation, disassembly, and maintenance of the second circuit board, and improves the overall flexibility and convenience of the structure.

[0019] In some embodiments, one end of the resilient locking portion is connected to the base plate, and the other end extends in a direction away from the battery cell assembly; wherein the resilient locking portion has a protrusion protruding toward the receiving groove, and at least a portion of the protrusion is located on the side of the second circuit board away from the base plate.

[0020] In these embodiments, the structure is simple and compact, does not take up too much space, and facilitates the disassembly and installation of the second circuit board.

[0021] In some embodiments, the resilient locking portion includes a first extension and a second extension, a protrusion located in the first extension, the first extension being connected between the second extension and the base plate; and / or, the surface of the protrusion facing away from the second circuit board is a slope or an arc surface.

[0022] In these embodiments, the design of the guide surface of the second extension or protrusion is conducive to the assembly of the second circuit board and improves the assembly convenience of the second circuit board.

[0023] In some embodiments, there are multiple elastic locking parts, and each elastic locking part is provided corresponding to each cut.

[0024] In these embodiments, the stability and reliability of the elastic locking part in fixing the second circuit board are enhanced, which can effectively prevent the second circuit board from loosening or shifting in complex working environments.

[0025] In some embodiments, the battery device further includes a battery management unit, and a wireless communication unit is wirelessly connected to the battery management unit.

[0026] In these embodiments, the wireless communication unit transmits the data collected by the sampling component to the battery management unit wirelessly, which avoids the design difficulties caused by complex wiring harness routing and eliminates the need to plan the wiring harness layout. In the production and assembly process, it reduces the operation of wiring harness insertion and fixing, improves assembly efficiency, and reduces quality problems caused by poor wiring harness connection. At the same time, it eliminates complex wiring harnesses, saves internal space in the battery pack, and avoids the wiring harness occupying space and compressing the effective volume of the battery pack.

[0027] Secondly, this application provides an electrical device including a battery device according to any of the first aspects of the above embodiments, the battery device being used to provide electrical energy.

[0028] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0029] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0032] Figure 3This is a schematic diagram of the structure of a battery cell assembly provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the exploded structure of a single battery cell provided in an embodiment of this application;

[0034] Figure 5 This is a three-dimensional structural schematic diagram of the busbar component, sampling component, and first insulating component provided in an embodiment of this application;

[0035] Figure 6 This is a top view of the busbar component, sampling component, and first insulating component provided in an embodiment of this application;

[0036] Figure 7 yes Figure 5 Enlarged view of section A;

[0037] Figure 8 yes Figure 5 Enlarged view of section B.

[0038] The accompanying drawings may not be drawn to scale.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1000, vehicles;

[0041] 100. Battery assembly; 110. Controller; 120. Motor;

[0042] 200. Battery cell modules;

[0043] 300. Enclosure; 301. First enclosure; 302. Second enclosure;

[0044] 10. Battery cells;

[0045] 11. Housing; 12. End cap; 13. Electrode assembly; 14. Electrode terminal;

[0046] 21. Busbar component; 211. Busbar;

[0047] 22. Sampling component; 221. First circuit board; 2211. First section; 2212. Second section; 222. Second circuit board; 223. Accommodation space; 224. Connecting socket; 225. Connecting plug;

[0048] 3. First insulating component; 30. Receiving groove; 31. Base plate; 32. Rib; 321. Cutout; 33. Elastic locking part; 330. Protrusion; 331. First extension; 332. Second extension;

[0049] X, the first direction; Y, the second direction. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] In this application, "multiple" means two or more (including two).

[0057] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0058] In related technologies, battery devices often integrate multiple battery cells and combine them through a busbar component. A sampling component collects and transmits the operating parameters of the battery cells to the Battery Management System (BMS), such as current, voltage, or temperature. However, the sampling method using a sampling harness and connectors in the sampling loop between the sampling component and the BMS presents the following problems: 1. As the number of battery cells in the pack increases, it is difficult to achieve neat and uniform wiring using a harness and connector method. Wiring needs to be compressed within the limited battery pack space, and assembly largely relies on manual labor, making automated / integrated production difficult; 2. It is difficult to achieve a sealed design using connectors, and connectors occupy a large amount of height space, which is not conducive to the optimized design of the battery pack space; 3. Problems caused by connectors account for a high proportion of after-sales issues in the entire battery management system. Connectors are prone to corrosion, cracking, poor contact, and other problems, which can seriously affect the safety of electrical equipment (such as vehicles).

[0059] To address the aforementioned issues, this application provides a battery device comprising a battery cell assembly, a busbar component, a sampling component, and a first insulating component. By incorporating a sampling component, a first circuit board is directly connected to the busbar to collect signals, which are then wirelessly transmitted via a second circuit board. This avoids design challenges caused by complex wiring harnesses and eliminates the need for wiring harness layout planning. In the production and assembly process, it reduces wiring harness insertion and fixing operations, improving assembly efficiency and reducing quality issues caused by poor wiring harness connections. Simultaneously, the elimination of complex wiring harnesses saves internal space in the battery pack, preventing the wiring harness from compressing the effective volume of the battery pack and allowing the battery pack to integrate more battery cells or optimize the layout of other components within a limited space. By providing a receiving groove on the first insulating component to partially embed the second circuit board, space utilization is optimized, and short-circuit risks between the battery cells and the sampling circuit are effectively prevented through insulation. The positioning function of the receiving groove ensures the stability of the second circuit board under vibration or shock environments, improving the reliability of wireless communication. This, in turn, improves the overall performance and reliability of the battery device.

[0060] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical equipment using battery devices.

[0061] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0062] 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.

[0063] 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 this application embodiment is not limited to this. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to this either.

[0064] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack. A battery pack generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0065] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer, the latter coated on the surface of the current collector. The current collector includes a positive current-collecting section and a positive electrode tab connected to it. The current-collecting section is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer being coated on the surface of the negative current collector. The negative current collector includes a negative current collection section and a negative electrode tab connected to the negative current collection section. The negative current collection section is coated with the negative active material layer, while the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes negative active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0066] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0067] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 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, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 110 and a motor 120. The controller 110 is used to control the battery to supply power to the motor 120, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0068] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0069] Figure 2A schematic diagram of the structure of a battery device according to an embodiment of this application is shown.

[0070] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 200 for providing voltage and capacity. The battery cell assembly 200 may include a plurality of battery cells 10, which are connected in series, parallel, or mixed connection via a busbar.

[0071] In some embodiments, the battery cell assembly 200 is typically formed by arranging a plurality of battery cells 10.

[0072] As an example, the battery cell assembly 200 can be a battery module, which is formed by arranging and fixing multiple battery cells 10 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 10 together with cable ties.

[0073] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 300 and one or more battery cell assemblies 200, the battery cell assemblies 200 being housed in the housing 300.

[0074] As an example, the battery cell assembly 200 can be a battery cell assembly 200, which can be housed in the housing 300 by fixing the battery cell assembly 200 in the housing 300.

[0075] As an example, the battery cell assembly 200 can also be housed in the housing 300 by directly fixing multiple battery cells 10 to the housing 300.

[0076] As an example, the housing 300 may include a first housing 301 and a second housing 302. The first housing 301 and the second housing 302 cover each other, and together they define a closed receiving space for accommodating the battery cell assembly 200. Here, "closed" means covered or closed, and can be sealed or unsealed. The first housing 301 may be a top cover or a bottom plate.

[0077] The second box 302 can be a hollow structure with one end open, and the first box 301 is a plate-like structure. The first box 301 covers the open side of the second box 302 to form a box 300 with a receiving portion. Alternatively, both the first box 301 and the second box 302 can be hollow structures with one side open, and the open side of the first box 301 covers the open side of the second box 302 to form a box 300 with a receiving space. Of course, the first box 301 and the second box 302 can be of various shapes, such as cylinders, cuboids, etc.

[0078] As an example, the housing 300 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 300 forms an enclosed space to house the battery cell assembly 200.

[0079] In some embodiments, the housing 300 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 300 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 300 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0080] Figure 3 A schematic diagram of the structure of a battery cell assembly according to an embodiment of this application is shown.

[0081] In some embodiments, such as Figure 2 and Figure 3 As shown, there are multiple battery cells 10. These multiple battery cells 10 are first connected in series, parallel, or in a mixed manner to form a battery cell assembly 200. The multiple battery cell assemblies 200 are then connected in series, parallel, or in a mixed manner to form a whole, which is housed within the casing 300.

[0082] Multiple battery cells 10 in the battery cell assembly 200 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 10 in the battery cell assembly 200.

[0083] In this application, the battery cell 10 may include lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc., and the embodiments of this application are not limited to this.

[0084] Figure 4 An exploded structural diagram of a battery cell according to an embodiment of this application is shown.

[0085] A battery cell (cell 10) refers to the smallest unit that makes up a battery. For example... Figure 4 As shown, the battery cell 10 includes a housing 11, an end cap 12, and an electrode assembly 13.

[0086] Electrode assembly 13 is the component in the battery cell 10 where electrochemical reactions occur. The housing 11 may contain one or more electrode assemblies 13. The electrode assembly 13 is mainly formed by winding or stacking electrode sheets, which are divided into positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs can be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery cell 10, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 14 to form a current loop.

[0087] The electrode assembly 13 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0088] In some embodiments, the electrode assembly 13 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0089] In some embodiments, the electrode assembly 13 is a stacked structure. As an example, multiple positive and negative electrodes can be provided, with multiple positive and multiple negative electrodes stacked alternately. Multiple spacers can be provided and respectively provided between any adjacent positive or negative electrodes. Alternatively, the spacers can be provided continuously and provided between any adjacent positive or negative electrodes by folding.

[0090] In some embodiments, the electrode assembly 13 may be cylindrical, flat, or polygonal in shape.

[0091] In some embodiments, the electrode assembly 13 is provided with tabs that can conduct current from the electrode assembly 13. The tabs include a positive tab and a negative tab.

[0092] The battery cell 10 may include a housing 11. The housing 11 is an assembly that mates with the end cap 12 to form an internal environment for the battery cell 10, wherein the formed internal environment can accommodate the electrode assembly 13, electrolyte (not shown in the figure), and other components. The housing 11 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 11), or an aluminum-plastic film, etc. In some embodiments, the housing 11 can be a sealed structure or a non-sealed structure. As an example, when the housing 11 is a non-sealed structure, the housing 11 serves to protect the electrode assembly 13, and a sealing bag is included between the housing 11 and the electrode assembly 13 for encapsulating the electrode assembly 13 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the housing 11 is a sealed structure, it is used to encapsulate the electrode assembly 13 and electrolyte, etc.

[0093] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0094] The housing 11 and the end cap 12 can be independent components. One or more openings can be provided on the housing 11, and one or more end caps 12 can close the openings to form the internal environment of the battery cell 10. Optionally, the end cap 12 and the housing 11 can be integrated. Optionally, the end cap 12 and the housing 11 can form a common connection surface before other components are inserted into the housing, and the end cap 12 closes the housing 11 when it is necessary to encapsulate the interior of the housing 11.

[0095] In some embodiments, the electrode terminal 14 can be disposed on the end cap 12 or on the housing 11, and the electrode terminal 14 is electrically connected to the electrode tab. The electrode terminal 14 can be directly connected to the electrode tab or indirectly connected to the electrode tab through an adapter.

[0096] Figure 5 A three-dimensional structural schematic diagram of a busbar component, a sampling component, and a first insulating component provided in an embodiment of this application is shown.

[0097] Please refer to the following: Figures 2 to 5 In a first aspect, this application proposes a battery device 100, which includes a battery cell assembly 200, a busbar component 21, a sampling component 22, and a first insulating member 3. The battery cell assembly 200 includes at least two battery cells 10, which are arranged along a first direction X. The busbar component 21 is disposed on one side of the battery cell assembly 200 and includes a plurality of busbars 211, each of which is electrically connected to at least one battery cell 10. The sampling component 22 is disposed on one side of the battery cell assembly 200 and includes a first circuit board 221 and a second circuit board 222. The first circuit board 221 extends along the first direction X and is electrically connected to the plurality of busbars 211. The second circuit board 222 is electrically connected to the first circuit board 221 and is provided with a wireless communication unit. The first insulating member 3 is disposed between the sampling component 22 and the battery cell assembly 200 and is provided with a receiving groove 30. At least a portion of the second circuit board 222 is located within the receiving groove 30.

[0098] The first direction X can be the length or width direction of the battery device 100. The battery device 100 can contain two or more battery cells 10, which can be arranged along the first direction X to form a battery cell assembly 200. To facilitate the electrical connection between the sampling component 22 and the busbar 211, the sampling component 22 and the busbar component 21 are located on the same side of the battery cell assembly 200. With the battery cells 10 arranged in a single direction and the busbar component 21 and sampling component 22 integrated on the same side, the structure is compact, suitable for standardized module design, and easy to expand, for example, by increasing the number of battery cells 10 along the first direction X.

[0099] The busbar component 21 is used to connect at least two battery cells 10 in series or in parallel. The sampling component 22 is electrically connected to the busbar component 21 and is used to collect and receive one or more parameter information such as voltage, current, and temperature of each battery cell 10. A busbar 211 can connect to the electrode terminals 14 of two battery cells 10 simultaneously.

[0100] The first circuit board 221 is used to collect parameters such as voltage, current, and temperature of the battery cell 10. For example, the first circuit board 221 can be a flexible printed circuit (FPC), and each bus 211 on the FPC is provided with a nickel strip, which is connected to the bus 211 through the nickel strip to read signals such as voltage, current, and temperature.

[0101] The second circuit board 222 is electrically connected to the first circuit board 221, for example, through a low-voltage connector plug and socket. The second circuit board 222 can be a printed circuit board (PCB) integrating a wireless communication unit to transmit the collected data wirelessly to the Battery Management Unit (BMU) or an external monitoring system. For example, the wireless communication unit can send battery parameter information to the BMU via Bluetooth. Additionally, the wireless communication unit includes, but is not limited to, Bluetooth communication; it can also be Wi-Fi communication, near-field communication, LoRa module communication, etc. Optionally, the first circuit board 221 collects battery parameters (such as cell voltage and temperature) in real time, and the second circuit board 222 uploads the data wirelessly. Wireless transmission reduces the use of terminals and cables, lowers material costs, and reduces failures caused by cable aging. It eliminates the need for physical cables, avoiding wiring complexity.

[0102] The first insulating member 3 serves both insulating and protective functions. It insulates and separates the sampling component 22 from the battery cell assembly 200 to prevent short-circuit contact between the first circuit board 221 or the second circuit board 222 and the battery cell assembly 200, thus achieving insulation between the first circuit board 221 and the battery cell assembly 200, or between the second circuit board 222 and the battery cell assembly 200. Both the first circuit board 221 and the second circuit board 222 can be mounted on the first insulating member 3.

[0103] The opening of the receiving groove 30 faces away from the battery cell assembly 200. The receiving groove 30 can provide an installation position and fix the second circuit board 222 on the one hand, and raise the edge of the second circuit board 222 on the other hand, reducing the risk of damage to the second circuit board 222.

[0104] Optionally, the first insulating element 3 can be integrally molded by injection molding. The material of the first insulating element 3 includes insulating materials, such as plastics, rubber, or engineering resins. Optionally, the first insulating element 3 may include polyethylene terephthalate (PET). PET has good insulating properties. Using PET as the material for the first insulating element 3 is beneficial to improving the insulating protection of the first insulating element 3 for the sampling component 22, and PET has high structural strength.

[0105] In this embodiment, the battery device 100 includes a battery cell assembly 200, a busbar component 21, and a sampling component 22. By setting the sampling component 22, the first circuit board 221 is directly electrically connected to the busbar 211 to collect signals, and then the signals are wirelessly transmitted via the second circuit board 222. This avoids the design difficulties caused by complex wiring harnesses and eliminates the need to plan the wiring harness layout. In the production and assembly process, it reduces the insertion and fixing of wiring harnesses, improves assembly efficiency, and reduces quality problems caused by poor wiring harness connections. At the same time, it eliminates complex wiring harnesses, saves internal space in the battery pack, and avoids the wiring harness occupying space and compressing the effective volume of the battery pack, allowing the battery pack to integrate more battery cells 10 or optimize the layout of other components within a limited space. By setting a receiving groove 30 on the first insulating member 3 to partially embed the second circuit board 222, it not only optimizes space utilization but also effectively prevents the risk of short circuit between the battery cell 10 and the sampling circuit through insulation isolation. The positioning function of the receiving groove 30 ensures that the second circuit board 222 remains stable under vibration or shock environments, improving the reliability of wireless communication. This improves the overall performance and reliability of the battery device 100.

[0106] Compared with related technologies, the embodiments of this application improve the problems of difficult wiring and assembly between the sampling component 22 and the battery management system, large space occupation, easy corrosion, cracking, poor contact of the connectors, and high cost pressure caused by the number of connectors and wire harness length. It reduces the number of wire harnesses and connectors, lowers the overall cost, and improves the reliability of the battery device 100.

[0107] In some embodiments, the battery device further includes a battery management unit, and a wireless communication unit is wirelessly connected to the battery management unit.

[0108] The battery management unit can be located inside the housing 300 or outside the housing; this application does not impose any specific restrictions on this.

[0109] In these embodiments, the wireless communication unit transmits the data collected by the sampling component 22 to the battery management unit wirelessly, which avoids the design difficulties caused by complex wiring harness routing and eliminates the need to plan the wiring harness layout. In the production and assembly process, it reduces the operation of wiring harness insertion and fixing, improves assembly efficiency, and reduces quality problems caused by poor wiring harness connection. At the same time, it eliminates the need for complex wiring harnesses, saves internal space in the battery pack, and avoids the wiring harness occupying space and compressing the effective volume of the battery pack.

[0110] Figure 6 A top view of the busbar component, sampling component, and first insulating component provided in an embodiment of this application is shown.

[0111] Combined with reference Figure 5 and Figure 6 In some embodiments, the first circuit board 221 includes two first portions 2211 spaced apart along the second direction Y, each first portion 2211 being electrically connected to a corresponding busbar 211, and a receiving space 223 being formed between the two first portions 2211. At least a portion of the second circuit board 222 is located within the receiving space 223, and the second direction Y intersects with the first direction X.

[0112] Optionally, the first direction X is perpendicular to the second direction Y.

[0113] Each first section 2211 is electrically connected to its corresponding busbar 211 to collect electrical signals (such as voltage, current, temperature, etc.) from the battery cell 10. The accommodating space 223 formed between the two first sections 2211 can provide a specific area for the layout of other components, such as providing a mounting position for the second circuit board 222 to optimize layout compactness, or providing an exhaust channel for the pressure relief mechanism of the battery cell 10 to improve the reliability of the pressure relief mechanism. Optionally, the two first sections 2211 can be set up independently, or they can be connected as a whole through the second section 2212 to reduce the number of connectors between the first circuit board 221 and the second circuit board 222.

[0114] At least a portion of the structure of the second circuit board 222 is located within the accommodating space 223 formed by the two first portions 2211 of the first circuit board 221, which reduces the distance between the second circuit board 222 and each of the first portions 2211 and facilitates the electrical connection between the second circuit board 222 and the first circuit board 221.

[0115] In these embodiments, the layout of two first sections 2211 spaced apart to form a receiving space 223, in which the second circuit board 222 is placed, makes full use of the space within the battery device 100, efficiently integrating sampling and communication functions within a limited space. The two first sections 2211 of the first circuit board 221 connect to two sets of busbars 211 to ensure signal acquisition stability. The second circuit board 222 is placed in the receiving space 223, reducing additional volume occupation and shortening the wiring distance with the first circuit board 221, thus reducing the risk of signal interference. The overall structure is compact, suitable for high-density battery modules, and balances high-precision sampling with reliable wireless transmission.

[0116] Figure 7 It shows Figure 5 Enlarged view of part A in the middle.

[0117] Combined with reference Figure 5 and Figure 7 In some embodiments, the first circuit board 221 is provided with one of a connection socket 224 and a connection plug 225, and the second circuit board 222 is provided with the other of a connection socket 224 and a connection plug 225. The connection socket 224 and the connection plug 225 are plugged into each other to make the first circuit board 221 and the second circuit board 222 electrically connected.

[0118] Optionally, the first circuit board 221 is connected to the second circuit board 222 via a low-voltage connector, which includes a connector socket 224 and a connector plug 225. For example, the first circuit board 221 is provided with a connector plug 225 for mating with the second circuit board 222 to realize battery sampling data transmission, and the second circuit board 222 is provided with a connector socket 224 for complementary insertion with the interface of the first circuit board 221, forming a physical and electrical connection.

[0119] The connector 224 and connector 225 can use standardized interfaces, such as pin headers and female headers, board-to-board connectors, to ensure quick plugging and unplugging and stable conduction, simplifying the assembly and maintenance process.

[0120] In these embodiments, by providing mutually matching connector sockets 224 and connector plugs 225 on the first circuit board 221 and the second circuit board 222 respectively, a simple and reliable plug-in electrical connection between the two is achieved, which not only ensures the reliability of signal transmission but also significantly improves assembly efficiency. The plug-in structure can also effectively reduce cable usage, reduce space occupation, and make the overall layout more compact.

[0121] Reference Figure 6 In some embodiments, the first circuit board 221 further includes a second portion 2212 connected between the two first portions 2211, and the second portion 2212 is located on one side of the second circuit board 222 in the first direction X.

[0122] The second part 2212 connects the two first parts 2211, so that the two first parts 2211 of the first circuit board 221 are connected as one unit. The top view of the first circuit board 221 can be U-shaped.

[0123] In these embodiments, by providing a second portion 2212 to connect the two first portions 2211 on the first circuit board 221, the first circuit board 221 is made into a single structure. This design enhances the structural integrity and stability of the first circuit board 221 itself. Simultaneously, signal transmission between the two first portions 2211 and the second circuit board 222 can be achieved through only one connector, reducing the number of connectors between the first circuit board 221 and the second circuit board 222.

[0124] In addition, placing the second part 2212 on one side of the second circuit board 222 in the first direction X is beneficial for rationally planning the position of each component in the overall circuit layout, reducing space occupation, and improving the compactness and rationality of the circuit system layout.

[0125] In some embodiments, the connector 225 is located on one of the two first portions 2211.

[0126] Signal transmission between the first circuit board 221 and the second circuit board 222 can be achieved using only one set of connectors 225 and 224, reducing the number of connectors 225 and 224 and simplifying the structure of the sampling component 22. The second circuit board 222 allows the connectors 225 to be directly plugged into via the connector 224, facilitating quick installation or replacement. Optionally, the connectors 225 can be located in the middle of the first section 2211.

[0127] In these embodiments, the connector 225 is integrated into one of the first portions 2211, simplifying the docking process between the first circuit board 221 and the second circuit board 222, enabling stable plugging and unplugging without the need for additional adapters. This reduces assembly complexity, improves production efficiency, and ensures reliable signal transmission.

[0128] In some embodiments, the first insulating member 3 includes a base plate 31 and a rib 32 protruding from the base plate 31 in a direction away from the battery cell assembly 200, the rib 32 and the base plate 31 forming a receiving groove 30.

[0129] The base plate 31 is a flat structure made of insulating material, which can be installed in close contact with the battery cell assembly 200, providing support and electrical isolation for the sampling assembly 22. The ribs 32 can be raised structures extending vertically from the surface of the base plate 31, integrally formed with the base plate 31, together forming the enclosure structure of the receiving groove 30. The height and position of the ribs 32 can be set according to the size and position of the second circuit board 222.

[0130] Optionally, the ribs 32 can be arranged around the second circuit board 222 to provide limiting and protection.

[0131] In these embodiments, the base plate 31 provides support for the sampling component 22 and the ribs 32. The enclosure structure formed by the ribs 32 provides precise mechanical positioning for the second circuit board 222, avoiding assembly misalignment. The ribs 32 also enhance the structural strength of the first insulating component 3 itself, enabling it to better withstand external stress while playing an insulating role, thus ensuring the stability of the structure.

[0132] Figure 8 It shows Figure 5 Enlarged view of section B.

[0133] Combined with reference Figure 5 and Figure 8 In some embodiments, the rib 32 has a plurality of cuts 321, which are spaced apart on the periphery of the second circuit board 222. The first insulating member 3 also includes an elastic locking portion 33, at least a portion of which is located within the cuts 321. The elastic locking portion 33 is deformed to move away from the receiving groove 30.

[0134] The cutout 321 can accommodate the elastic locking part 33 and prevents interference between the elastic locking part 33 and the rib 32, thereby facilitating the elastic deformation of the elastic locking part 33 and allowing the second circuit board 222 to be installed into the receiving groove 30. After installation, the second circuit board 222 is fixed.

[0135] The elastic locking part 33 is at least partially located within the cutout 321. When subjected to external force, the elastic locking part 33 can deform away from the receiving groove 30. Utilizing this deformation capability, it can perform locking or unlocking operations on the second circuit board 222.

[0136] In these embodiments, by creating multiple spaced cuts 321 on the rib 32 around the second circuit board 222, and providing an elastic locking part 33 at least partially located within the cuts 321, the cuts 321 provide an installation position and deformation space for the elastic locking part 33. This allows the elastic locking part 33 to flexibly deform as needed, thereby locking or unlocking the second circuit board 222. This not only enhances the connection stability and reliability between the first insulating member 3 and the second circuit board 222, but also facilitates the installation, disassembly, and maintenance of the second circuit board 222, improving the overall flexibility and convenience of the structure.

[0137] For example, when the second circuit board 222 is fixed, the elastic locking part 33 does not deform and is in its initial position, which can lock and fix the second circuit board 222, ensuring that the position of the second circuit board 222 on the first insulating member 3 is stable. When it is necessary to install or remove the second circuit board 222, the elastic locking part 33 is driven to deform away from the receiving groove 30, thereby releasing the restriction on the second circuit board 222 and unlocking the second circuit board 222.

[0138] Optionally, the resilient locking part 33 can be a snap-fit.

[0139] In some embodiments, one end of the resilient locking portion 33 is connected to the base plate 31, and the other end extends in a direction away from the battery cell assembly 200; wherein the resilient locking portion 33 has a protrusion 330 protruding toward the receiving groove 30, and at least a portion of the protrusion 330 is located on the side of the second circuit board 222 away from the base plate 31.

[0140] One end of the elastic locking part 33 is connected to the base plate 31, providing a fixed fulcrum for the entire elastic locking part 33, enabling it to deform around the connection point. The other end extends in a direction away from the battery cell assembly 200, and the extended part can interact with other components (such as the second circuit board 222).

[0141] The protrusion 330 is used to limit and lock the second circuit board 222, so that when the elastic locking part 33 cooperates with the second circuit board 222, it can limit or fix the second circuit board 222 from a specific direction.

[0142] In these embodiments, the elastic locking part 33 uses the connection point of the base plate 31 as a fulcrum, and through its own elastic deformation, the protrusion 330 can flexibly move closer to or further away from the second circuit board 222. When the second circuit board 222 needs to be installed, the deformation of the elastic locking part 33 makes the protrusion 330 make room, facilitating the placement of the second circuit board 222 into the receiving groove 30; after installation, the elastic locking part 33 returns to its original deformation, and the protrusion 330 is locked on the side of the second circuit board 222 away from the base plate 31, effectively preventing the second circuit board 222 from moving in the direction perpendicular to the base plate 31, ensuring its stable position. At the same time, this structure is simple and compact, does not occupy too much space, and facilitates the disassembly and installation of the second circuit board 222.

[0143] Optionally, the battery cell 10 is provided with a pressure relief mechanism, which is positioned facing the receiving space 223. The base plate 31 is provided with a thinning area corresponding to the pressure relief mechanism, which facilitates the venting of the pressure relief mechanism and reduces the safety risks of the battery device 100.

[0144] The pressure relief mechanism is used to release the internal gas of the battery cell 10. The pressure relief mechanism can be located between the two electrode terminals 14 of the same battery cell 10. For example, the internal pressure or temperature of the battery cell 10 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 10 reaches the predetermined threshold, the pressure relief mechanism actuates or a weak structure within the pressure relief mechanism is destroyed, thereby forming an opening or channel for the release of internal pressure or temperature. This threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 10. "Actuation" refers to the pressure relief mechanism being activated or undergoing a certain state, thereby allowing the internal pressure and temperature of the battery cell 10 to be released. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the pressure relief mechanism to form an exhaust path, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature, high-pressure material inside the battery cell 10 is discharged outwards from the actuated portion as a discharge. This method allows the battery cell 10 to release pressure and temperature under controlled pressure or temperature, thereby avoiding potentially more serious accidents.

[0145] Reference Figure 8 In some embodiments, the elastic locking portion 33 includes a first extension portion 331 and a second extension portion 332, a protrusion 330 located in the first extension portion 331, the first extension portion 331 being connected between the second extension portion 332 and the base plate 31; and / or, the surface of the protrusion 330 facing away from the second circuit board 222 is a slope or an arc surface.

[0146] The first extension 331 connects the second extension 332 and the base plate 31, serving to connect and transmit force, while also providing a mounting position for the protrusion 330, allowing the protrusion 330 to be positioned appropriately to limit the second circuit board 222. The second extension 332 can work in conjunction with the first extension 331 to enhance the elastic performance and structural stability of the elastic locking part 33.

[0147] For example, when installing the second circuit board 222 into the receiving groove 30, the second extension 332 can be pressed outward with the thumb to deform the elastic locking part 33 away from the receiving groove 30, so that the protrusion 330 will not interfere with the installation of the second circuit board 222, and the second circuit board 222 can be smoothly installed into the receiving groove 30. This avoids the operation of the second circuit board 222 pushing open the elastic locking part 33, reducing the risk of pressure damage to the second circuit board 222.

[0148] The design of the bevel or curved surface can provide a guiding effect for the second circuit board 222, making it easier for the second circuit board 222 to smoothly enter the receiving groove 30 and mate with the protrusion 330, thus reducing the installation difficulty. For example, the included angle between the bevel and the plane where the base plate 31 is located can be 30°-60°.

[0149] In these embodiments, the design of the guide surface of the second extension 332 or the protrusion 330 is conducive to the assembly of the second circuit board 222 and improves the assembly convenience of the second circuit board 222.

[0150] In some embodiments, the number of elastic locking portions 33 is multiple, and each elastic locking portion 33 is provided corresponding to each cutout 321.

[0151] In these embodiments, each elastic locking part 33 has a specific cutout 321 that matches it. This one-to-one correspondence ensures that each elastic locking part 33 can be installed in the right position and work effectively, which enhances the stability and reliability of the fixation and can effectively prevent the second circuit board 222 from loosening or shifting in complex working environments.

[0152] Secondly, this application provides an electrical device including a battery device 100 of any of the first aspects of the above embodiments, the battery device 100 being used to provide electrical energy.

[0153] The electrical equipment can be any of the aforementioned devices or systems that utilize battery devices 100.

[0154] Please see Figures 2 to 8According to some embodiments of this application, this application provides a battery device 100, which includes a battery cell assembly 200, a busbar component 21, and a sampling component 22. The battery cell assembly 200 includes at least two battery cells 10, which are arranged along a first direction X. The busbar component 21 is disposed on one side of the battery cell assembly 200 and includes a plurality of busbars 211, each of which is electrically connected to at least one battery cell 10. The sampling component 22 is disposed on one side of the battery cell assembly 200 and includes a first circuit board 221 and a second circuit board 222. The first circuit board 221 extends along the first direction X and is electrically connected to the plurality of busbars 211. The second circuit board 222 is electrically connected to the first circuit board 221 and is provided with a wireless communication unit. The first circuit board 221 includes two first portions 2211 spaced apart along the second direction Y. Each first portion 2211 is electrically connected to a corresponding busbar 211. A receiving space 223 is formed between the two first portions 2211. At least a portion of the second circuit board 222 is located within the receiving space 223. The second direction Y intersects the first direction X. The first circuit board 221 also includes a second portion 2212 connected between the two first portions 2211. The second portion 2212 is located on one side of the second circuit board 222 in the first direction X. A connector 225 is provided on the first portion 2211. The second circuit board 222 is provided with a connector socket 224. The connector socket 224 is plugged into the connector 225 to make the first circuit board 221 and the second circuit board 222 electrically connected. The battery device 100 also includes a first insulating member 3, which is disposed between the sampling component 22 and the battery cell assembly 200. The first insulating member 3 has a receiving groove 30, and at least a portion of the second circuit board 222 is located within the receiving groove 30. The first insulating member 3 includes a base plate 31 and a rib 32 protruding from the base plate 31 in a direction away from the battery cell assembly 200. The rib 32 and the base plate 31 enclose the receiving groove 30. The rib 32 has a plurality of cuts 321, which are spaced apart on the periphery of the second circuit board 222. The first insulating member 3 also includes an elastic locking portion 33, at least a portion of which is located within the cuts 321. The elastic locking portion 33 deforms to move away from the receiving groove 30. The elastic locking portion 33 includes a first extension portion 331 and a second extension portion 332. The protrusion 330 is located in the first extension portion 331, and the first extension portion 331 is connected between the second extension portion 332 and the base plate 31.

[0155] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly includes at least two battery cells, wherein the at least two battery cells are arranged along a first direction; A busbar assembly is disposed on one side of the battery cell assembly. The busbar assembly includes multiple busbars, each of which is electrically connected to at least one battery cell. A sampling component is disposed on one side of the battery cell assembly. The sampling component includes a first circuit board and a second circuit board. The first circuit board extends along the first direction and is electrically connected to a plurality of busbars. The second circuit board is electrically connected to the first circuit board and is provided with a wireless communication unit. A first insulating element is disposed between the sampling component and the battery cell assembly, and the first insulating element has a receiving groove, wherein at least a portion of the second circuit board is located within the receiving groove.

2. The battery device according to claim 1, characterized in that, The first circuit board includes two first portions spaced apart along a second direction, each first portion being electrically connected to a corresponding busbar, and a receiving space being formed between the two first portions. At least a portion of the second circuit board is located within the receiving space, and the second direction intersects the first direction.

3. The battery device according to claim 2, characterized in that, The first circuit board is provided with one of a connector socket and a connector plug, and the second circuit board is provided with the other of the connector socket and the connector plug. The connector socket and the connector plug are plugged into each other to make the first circuit board and the second circuit board electrically connected.

4. The battery device according to claim 3, characterized in that, The first circuit board further includes a second portion connected between the two first portions, and the second portion is located on one side of the second circuit board in the first direction.

5. The battery device according to claim 4, characterized in that, The connector is located on one of the two first portions.

6. The battery device according to claim 1, characterized in that, The first insulating member includes a base plate and ribs protruding from the base plate in a direction away from the battery cell assembly, the ribs and the base plate forming the receiving groove.

7. The battery device according to claim 6, characterized in that, The rib has multiple cuts, which are spaced apart on the periphery of the second circuit board. The first insulating member also includes an elastic locking part, at least part of which is located within the cuts. The elastic locking part is deformed to move away from the receiving groove.

8. The battery device according to claim 7, characterized in that, One end of the elastic locking part is connected to the base plate, and the other end extends in a direction away from the battery cell assembly. The elastic locking portion has a protrusion that protrudes toward the receiving groove, and at least a portion of the protrusion is located on the side of the second circuit board away from the base plate.

9. The battery device according to claim 8, characterized in that, The elastic locking portion includes a first extension and a second extension, the protrusion being located in the first extension, and the first extension connecting the second extension and the base plate; and / or The surface of the protrusion facing away from the second circuit board is a slope or an arc surface.

10. The battery device according to claim 7, characterized in that, The number of elastic locking parts is multiple, and each elastic locking part is provided corresponding to each cut.

11. The battery device according to any one of claims 1 to 10, characterized in that, The battery device further includes a battery management unit, and the wireless communication unit is wirelessly connected to the battery management unit.

12. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 11, the battery device being used to provide electrical energy.

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