Battery device and electric device

Abstract

The embodiment of the invention provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer and a high-voltage box assembly, the battery monomers are arranged in the box body; the high-voltage box assembly comprises a mounting part, a first circuit board, a second circuit board and a connector, the first circuit board and the second circuit board are both connected with the mounting part, the mounting part is connected with the box body, one of the first circuit board and the second circuit board is connected with the single battery to collect information of the single battery and generate an electric signal, and the other one is used for receiving the electric signal; one end of the connector is welded with the first circuit board, and the other end is plugged with the second circuit board. According to the technical scheme, the energy density of the battery device can be improved.

Description

Technical Field

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

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

[0003] In the development of battery technology, how to improve the energy density of battery devices is a technical problem that needs to be solved urgently. Summary of the Invention

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

[0005] This application is achieved through the following technical solutions: In a first aspect, the present application provides a battery device comprising a housing, a battery cell, and a high-voltage box assembly. The battery cell is disposed within the housing. The high-voltage box assembly comprises a mounting member, a first circuit board, a second circuit board, and a connector. The first circuit board and the second circuit board are both connected to the mounting member, which is connected to the housing. One of the first circuit board and the second circuit board is connected to the battery cell to collect information about the battery cell and generate an electrical signal, and the other is used to receive the electrical signal. One end of the connector is welded to the first circuit board, and the other end is plugged into the second circuit board.

[0006] The technical solution of the embodiment of the present application connects both the second circuit board and the first circuit board to the mounting member, thereby bringing the second circuit board closer to the first circuit board. One end of the connector is soldered to the first circuit board, while the other end is plugged into the second circuit board. Compared to connecting the connector to the second circuit board or the connector to the first circuit board via a wiring harness, this reduces the use of wiring harnesses, saves costs, and helps reduce the weight of the high-voltage box assembly, thereby reducing the weight of the battery device and improving the energy density of the battery device. At the same time, the connector is plugged into the second circuit board, facilitating connection and removal of the connector and the second circuit board, reducing the difficulty of installation and maintenance.

[0007] In some embodiments, the connector includes a connecting member, the connecting member includes a first connecting section, and the first connecting section is formed with a connecting groove. The high-voltage box assembly also includes a connecting column, one end of the connecting column is connected to the second circuit board, and the other end of the connecting column is clamped in the connecting groove.

[0008] The technical solution of the embodiment of the present application is to connect the second circuit board by connecting one end of the connecting column and clamping the other end into the connecting groove of the connecting member, which helps to improve the convenience of connecting the connector to the second circuit board.

[0009] In some embodiments, the connector includes two sub-connectors, which are arranged opposite each other. Each sub-connector includes a main body and a protruding portion, the protruding portion being connected to an end of the main body facing the second circuit board. The protruding portion of one sub-connector protrudes from the main body in a direction approaching the other sub-connector, and the gap between the two protruding portions forms a connecting groove.

[0010] The technical solution of the embodiment of the present application forms a connecting groove through the gap between the two protrusions. When the connecting column is clamped in the connecting groove, the protrusion is deformed, so that the two protrusions are interference fit with the connecting column, which is beneficial to improving the reliability of the connection between the connecting column and the connecting groove.

[0011] In some embodiments, in the first direction, both ends of the connecting column are connected to the second circuit board and the sub-connector respectively. In the first direction, the distance L between the end surface of the connecting column facing away from the second circuit board and the protrusion satisfies: 1mm≤L≤4mm.

[0012] The technical solution of the embodiment of the present application sets the distance L between the end surface of the connecting post facing away from the second circuit board and the protrusion to meet the above conditions. When L is ≥ 1 mm, the risk of the connecting post swaying in the first direction and thus disengaging from the connecting slot is reduced, thereby improving the reliability of the connection between the connecting post and the connecting slot. When L is ≤ 4 mm, the dimensions of the connecting post and the connecting slot in the first direction are reduced, thereby saving space for the mounting member.

[0013] In some embodiments, the connector includes a connecting member, the connecting member includes a first connecting section, the second circuit board is provided with a first connecting hole, and the first connecting section is snapped into the first connecting hole.

[0014] The technical solution of the embodiment of the present application is to improve the convenience of connecting the connector to the second circuit board by clamping the first connecting section to the first connecting hole.

[0015] In some embodiments, the first connecting segment includes a first sub-connecting segment and a second sub-connecting segment. Along a first direction, an end of the first sub-connecting segment facing the first circuit board is connected to an end of the second sub-connecting segment facing the first circuit board. In a second direction, a portion of the first sub-connecting segment and a portion of the second sub-connecting segment are spaced apart to form a cavity. When the first connecting segment is configured to be engaged with the first connecting hole, the first sub-connecting segment and the second sub-connecting segment move closer together to compress the cavity. The first direction is perpendicular to the second direction.

[0016] According to the technical solution of the embodiment of the present application, when the first connecting section is clamped in the first connecting hole, the first sub-connecting section and the second sub-connecting section approach each other, so that the cavity is compressed, and the first sub-connecting section and the second sub-connecting section tend to move away from each other, thereby forming an interference fit with the first connecting hole, which is beneficial to improving the reliability of the first connecting section being clamped in the first connecting hole.

[0017] In some embodiments, along the first direction, an end of the first connecting sub-segment away from the first circuit board is connected to an end of the second connecting sub-segment away from the first circuit board.

[0018] The technical solution of the embodiment of the present application is to connect one end of the first sub-connecting segment with one end of the second sub-connecting segment, and connect the other end of the first sub-connecting segment with the other end of the second sub-connecting segment, thereby forming a cavity with both ends closed in the first direction, which is beneficial to improving the structural strength of the first connecting segment, and thus helping to improve the reliability of the first connecting segment being snapped into the first connecting hole.

[0019] In some embodiments, the connector further includes an elastic member disposed in the cavity, and in the second direction, two ends of the elastic member respectively abut against the first sub-connecting segment and the second sub-connecting segment.

[0020] According to the technical solution of the embodiment of the present application, when the first connecting section is clamped in the first connecting hole, the elastic member is compressed, so that the elastic member has a tendency to reset, thereby making the first connecting section and the first connecting hole interference fit, which is beneficial to improving the reliability of the first connecting section being clamped in the first connecting hole.

[0021] In some embodiments, the connector includes a connecting member, the connecting member includes a second connecting section facing away from the second circuit board, the first circuit board is provided with a second connecting hole, the second connecting section is passed through the second connecting hole, and the second connecting section is welded to the first circuit board.

[0022] The technical solution of the embodiment of the present application helps to improve the reliability of the connection between the second connecting section and the first circuit board by welding the second connecting section to the first circuit board.

[0023] In some embodiments, there are multiple connectors, which are spaced apart. The connector further comprises a housing made of insulating material, the housing being provided with multiple spaced apart first through holes, and one connector correspondingly passing through one of the first through holes.

[0024] The technical solution of the embodiment of the present application reduces the risk of interference between the multiple connectors by installing the multiple connectors one by one in the respective first through holes of the housing, which helps to improve the reliability of the installation of the connectors.

[0025] In some embodiments, the connector further comprises a plurality of barriers connected to the housing and located between any two adjacent connectors, and the barrier is made of insulating material.

[0026] The technical solution of the embodiment of the present application helps to reduce the risk of electrical effects occurring between two adjacent connecting members by providing a barrier member between the two adjacent connecting members.

[0027] In some embodiments, the first circuit board is provided with a third connecting hole, one end of the barrier is connected to the housing, and the other end is inserted into the third connecting hole.

[0028] The technical solution of the embodiment of the present application helps to improve the reliability of the connector connecting to the first circuit board by inserting the barrier member into the third connecting hole.

[0029] In some embodiments, the material of the shell includes at least one of a ceramic-based material, a polymer-based composite material, and glass fiber.

[0030] The technical solution of the embodiment of the present application is that the ceramic-based material, polymer-based composite material, and glass fiber have good high-temperature resistance. By setting the material of the shell to at least one of the ceramic-based material, polymer-based composite material, and glass fiber, the risk of damaging the shell due to welding the connector to the first circuit board is reduced, which is conducive to improving the reliability of the battery device.

[0031] In some embodiments, the first circuit board is provided with a fourth connection hole, and the connector further includes a fixing member, one end of the fixing member is connected to the housing, and the other end is inserted into the fourth connection hole.

[0032] The technical solution of the embodiment of the present application connects the housing and the first circuit board through a fixing member, which helps to improve the reliability of the connector connecting to the first circuit board.

[0033] In some embodiments, the hardness of the fixing member is greater than the hardness of the connecting member.

[0034] The technical solution of the embodiment of the present application helps to improve the reliability of the connector connecting to the first circuit board by setting the hardness of the fixing member to be greater than the hardness of the connecting member.

[0035] In a second aspect, the present application further provides an electrical device, comprising a battery device according to any one of the embodiments of the first aspect, wherein the battery device is used to provide electrical energy to the electrical device.

[0036] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application; Figure 2 A schematic diagram of the structural decomposition of a battery device provided in some embodiments of the present application; Figure 3 A schematic diagram of the structural decomposition of a battery cell provided in some embodiments of the present application; Figure 4 A schematic structural diagram of a high-voltage box assembly provided in some embodiments of the present application; Figure 5 A schematic diagram of a connector provided in some embodiments of the present application connecting a second circuit board and a first circuit board; Figure 6 for Figure 5 Structural breakdown diagram; Figure 7 A schematic diagram of the structure of a connector provided in some embodiments of the present application; Figure 8 A schematic diagram of the structure of a connector provided in some embodiments of the present application connecting a second circuit board and a connecting column; Figure 9 Schematic diagram of the partial structure of the connector provided in some other embodiments of the present application; Figure 10 A schematic structural diagram of a second circuit board provided in some other embodiments of the present application; Figure 11 A schematic diagram of a first circuit board provided in some embodiments of the present application; Figure 12 Schematic diagram of a housing provided for some embodiments of the present application.

[0039] Icons: 1-battery device; 10-housing; 11-first sub-housing; 12-second sub-housing; 20-battery cell; 21-battery cell housing; 22-housing; 23-end cap; 24-electrode assembly; 25-electrode terminal; 30-high-voltage box assembly; 31-mounting member; 32-second circuit board; 321-first connecting hole; 322-connecting column; 323-fifth connecting hole; 33-first circuit board; 331-second connecting hole; 332-third connecting hole; 333-fourth connecting hole; 34-insulating member; 40-connector ;41-connecting piece;411-first connecting section;4111-connecting groove;4112-first sub-connecting section;4113-second sub-connecting section;4114-cavity;412-sub-connecting piece;4121-main body;4122-protrusion;413-second connecting section;42-elastic piece;43-housing;431-first through hole;432-second through hole;433-third through hole;44-blocking piece;45-fixing piece;100-vehicle;110-controller;120-motor;X-first direction;Y-second direction. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0042] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0044] In this application, the term "and / or" simply describes an association relationship between related objects, indicating that three possible relationships exist. For example, the second circuit board and / or the first circuit board can represent three situations: the second circuit board exists alone, the second circuit board and the first circuit board exist simultaneously, and the first circuit board exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0045] The term "multiple" used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two (including two) groups, and "multiple sheets" refers to more than two (including two) sheets.

[0046] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0047] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0048] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0049] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0050] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0051] As an example, the housing may include a first sub-housing and a second sub-housing. The first and second sub-housings snap together to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first sub-housing may be a top cover or a bottom plate.

[0052] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0053] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0054] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0055] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0056] The battery cells may be, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0057] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0058] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0059] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0060] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, the metal foil can be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. A composite current collector can include a polymer base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy) on a polymer substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0061] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0062] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0063] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium.

[0064] In some embodiments, the negative electrode current collector has two opposite surfaces in its thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0065] As an example, the negative electrode active material may be a negative electrode active material for a battery that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0066] In some embodiments, the separator is a membrane. The present application has no particular limitation on the type of the membrane, and any known porous membrane with good chemical and mechanical stability can be selected.

[0067] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0068] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0069] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0070] In some embodiments, the electrode assembly is a laminate structure.

[0071] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0072] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0073] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to a tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal may be provided on an end cap or on the housing.

[0074] In some embodiments, the housing is provided with an explosion-proof valve for releasing the internal pressure of the battery cell.

[0075] In some embodiments, the housing can be a sealed structure or a non-sealed structure. For example, when the housing is a sealed structure, the housing can protect the electrode assembly and prevent leakage of electrolyte. When the housing is a non-sealed structure, the housing can also protect the electrode assembly. A sealing bag can be included between the housing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film.

[0076] As an example, the battery cell may be a prismatic battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery.

[0077] Currently, market trends indicate that battery devices are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in power tools, drones, and energy storage devices. As battery applications continue to expand, market demand is also growing.

[0078] The development of battery technology requires simultaneous consideration of multiple design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and other performance parameters. In addition, as environmental conditions and / or internal battery conditions change, the energy density of the battery device is also one of the key factors to consider.

[0079] The battery device includes a first circuit board connected to a battery cell to collect battery cell information (charge and discharge current, charge and discharge voltage, temperature, etc.) and generate an electrical signal, and a second circuit board that receives the electrical signal generated by the first circuit board. When the electrical signal received by the second circuit board indicates an abnormal battery cell status (such as abnormal charge and discharge current, abnormal charge and discharge voltage, abnormal temperature, etc.), the second circuit board controls the battery cell to disconnect power.

[0080] However, since the second circuit board is far away from the first circuit board, the second circuit board is usually connected to the first circuit board through a first wiring harness, the first circuit board is connected to the second wiring harness, and the first wiring harness and the second wiring harness are connected through a connector, thereby achieving the connection between the second circuit board and the first circuit board. This results in a larger weight of the battery device, which affects the energy density of the battery device.

[0081] Based on the above considerations, in order to solve the problem that the first wiring harness and the second wiring harness increase the weight of the battery device, thereby resulting in poor energy density of the battery device, the present application provides a battery device, which includes a housing, a battery cell and a high-voltage box assembly. The battery cell is arranged in the housing. The high-voltage box assembly includes a mounting member, a first circuit board, a second circuit board and a connector. The first circuit board and the second circuit board are both connected to the mounting member, and the mounting member is connected to the housing. One of the first circuit board and the second circuit board is connected to the battery cell for collecting information of the battery cell and generating an electrical signal, and the other is used to receive the electrical signal. One end of the connector is welded to the first circuit board, and the other end is plugged into the second circuit board.

[0082] By connecting the second circuit board and the first circuit board to the mounting piece, the distance between the second circuit board and the first circuit board is made closer, and one end of the connector is welded to the first circuit board, and the other end is plugged into the second circuit board. Compared with connecting the connector and the second circuit board through a wiring harness or connecting the connector and the first circuit board through a wiring harness, the use of wiring harnesses is reduced, costs are saved, and the weight of the high-voltage box assembly is reduced, thereby helping to reduce the weight of the battery device and improve the energy density of the battery device.

[0083] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices. Electrical devices may include mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, for example, including aircraft, rockets, space shuttles, and spacecraft.

[0084] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0085] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of a vehicle provided in some embodiments of the present application. Vehicle 100 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 1 is provided inside the vehicle 100. The battery device 1 can be provided at the bottom, head, or tail of the vehicle 100. The battery device 1 can be used to power the vehicle 100. For example, the battery device 1 can serve as the operating power source of the vehicle 100 and be used for the circuit system of the vehicle 100, such as for the working power requirements during the startup, navigation, and operation of the vehicle 100.

[0086] The vehicle 100 may further include a controller 110 and a motor 120 . The controller 110 is used to control the battery device 1 to supply power to the motor 120 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 100 .

[0087] In some embodiments of the present application, the battery device 1 can serve not only as an operating power source for the vehicle 100 , but also as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0088] The battery device includes a battery cell assembly and a power management system. The battery management system is connected to the battery cell assembly and is used to manage the charging and discharging of the battery cell assembly.

[0089] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application. The battery device 1 may include a housing 10 and a battery cell 20 , wherein the battery cell 20 is accommodated in the housing 10 .

[0090] The housing 10 is used to provide a storage space for the battery cells 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 can include a first sub-housing 11 and a second sub-housing 12. The first sub-housing 11 and the second sub-housing 12 cover each other, and the first sub-housing 11 and the second sub-housing 12 jointly define a storage space for accommodating the battery cells 20. The first sub-housing 11 can be a hollow structure with one end open, and the second sub-housing 12 can be a plate-like structure. The second sub-housing 12 covers the open side of the first sub-housing 11, so that the first sub-housing 11 and the second sub-housing 12 jointly define a storage space. The first sub-housing 11 and the second sub-housing 12 can also be hollow structures with one end open, and the open side of the first sub-housing 11 covers the open side of the second sub-housing 12.

[0091] In the battery device 1, there may be multiple battery cells 20, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 1 may comprise multiple battery cells 20 first connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single structure and housed within the housing 10. The battery device 1 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0092] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell provided in some embodiments of the present application. Figure 3As shown, the battery cell 20 includes a battery cell housing 21, an electrode assembly 24, and electrode terminals 25. The battery cell housing 21 includes a shell 22 and an end cap 23. The shell 22 has an opening, and the end cap 23 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.

[0093] The housing 22 is a component that cooperates with the end cap 23 to form the internal environment of the battery cell 20. This internal environment can be used to accommodate the electrode assembly 24, electrolyte, and other components. The housing 22 and the end cap 23 can be independent components. The housing 22 can be of various shapes and sizes. Specifically, the shape of the housing 22 can be determined based on the specific shape and size of the electrode assembly 24. The housing 22 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0094] The end cap 23 is a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 23 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cap 23 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents deformation of the end cap 23 under pressure or collision, thereby enhancing the structural strength and reliability of the battery cell 20. Functional components such as electrode terminals can be provided on the end cap 23. The electrode terminals can be used to electrically connect to the electrode assembly 24 to transfer electrical energy from or to the battery cell 20. The end cap 23 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this is not particularly limited in this embodiment of the present application. In some embodiments, an insulating structure can be provided inside the end cap 23 to isolate the electrical components within the housing 22 from the end cap 23, thereby reducing the risk of short circuits. Exemplary materials include plastic, rubber, and the like.

[0095] Please refer to Figure 4 、 Figure 5 and Figure 6 , Figure 4 This is a schematic diagram of the structure of the high-voltage box assembly provided in some embodiments of the present application. Figure 5 A schematic diagram of a connector provided in some embodiments of the present application connecting a second circuit board and a first circuit board, Figure 6 for Figure 5. An embodiment of the present application provides a battery device 1, which includes a case 10, a battery cell 20 and a high-voltage box assembly 30. The battery cell 20 is arranged in the case 10. The high-voltage box assembly 30 includes a mounting member 31, a second circuit board 32, a first circuit board 33 and a connector 40. The second circuit board 32 and the first circuit board 33 are both connected to the mounting member 31. The mounting member 31 is connected to the case 10. One of the first circuit board 33 and the second circuit board 32 is connected to the battery cell 20 for collecting information of the battery cell 20 and generating an electrical signal, and the other is used to receive the electrical signal. One end of the connector 40 is welded to the first circuit board 33, and the other end is plugged into the second circuit board 32.

[0096] In some embodiments, the high-voltage box assembly 30 can be disposed within the housing 10 , with the housing 10 providing protection for the high-voltage box assembly 30 and reducing the risk of damage to the high-voltage box assembly 30. In some embodiments, a first circuit board 33 can be connected to the battery cells 20 . The first circuit board 33 collects information from the battery cells 20 and generates electrical signals. The first circuit board 33 can serve as at least part of a battery monitoring unit (CSC).

[0097] Correspondingly, the second circuit board 32 receives the electrical signal generated by the first circuit board 33 , and the second circuit board 32 may serve as at least a part of a battery management unit (BMU).

[0098] In some embodiments, the second circuit board 32 may be connected to the battery cell 20 to collect information about the battery cell 20 and generate an electrical signal. The second circuit board 32 may serve as at least part of a battery supervising circuit (CSC).

[0099] Correspondingly, the first circuit board 33 receives the electrical signal generated by the second circuit board 32 , and the first circuit board 33 may serve as at least a part of a battery management unit (BMU).

[0100] In some embodiments, one of the first circuit board 33 and the second circuit board 32 may be a printed circuit board. For example, the first circuit board 33 may be a printed circuit board, or the second circuit board 32 may be a printed circuit board, or both the first circuit board 33 and the second circuit board 32 may be printed circuit boards.

[0101] In other embodiments, at least one of the first circuit board 33 and the second circuit board 32 may be a flexible circuit board.

[0102] In some embodiments, the mounting member 31 is disposed within the housing 10. The housing 10 may include a top wall and a bottom wall disposed opposite each other, with the bottom wall supporting the battery cells 20. The housing 10 may also include a side wall, one end of which surrounds the outer periphery of the bottom wall, and the other end of which may surround the outer periphery of the top wall. The mounting member 31 may be disposed on the bottom wall, the side wall, or the top wall.

[0103] In some embodiments, the mounting member 31 may be connected to the wall of the box body 10 by bolting.

[0104] In some embodiments, the mounting member 31 may have a cavity, and the first circuit board 33, the second circuit board 32, and the connector 40 may all be disposed within the cavity. The first circuit board 33 and the second circuit board 32 may be disposed on two adjacent walls of the mounting member 31, or the first circuit board 33 and the second circuit board 32 may be disposed on two opposing walls of the mounting member 31.

[0105] In some embodiments, the first circuit board 33 and the second circuit board 32 may be connected to the wall of the mounting member 31 by bolts.

[0106] In some embodiments, the thickness direction of the first circuit board 33 may be parallel to the thickness direction of the second circuit board 32 .

[0107] In some embodiments, a thickness direction of the first circuit board 33 may intersect with a thickness direction of the second circuit board 32 .

[0108] In some embodiments, the thickness direction of the first circuit board 33 may be perpendicular to the thickness direction of the second circuit board 32 .

[0109] In some embodiments, one end of the connector 40 is soldered to the first circuit board 33, and the other end of the connector 40 is plugged into the second circuit board 32. The second circuit board 32 may be provided with a mounting hole, and the other end of the connector 40 may be plugged into the mounting hole, forming an interference fit with the mounting hole to achieve the connection between the second circuit board 32 and the connector 40. Alternatively, the second circuit board 32 may be provided with a protrusion, and the other end of the connector 40 may be provided with a groove, and the protrusion and the groove may form an interference fit to achieve the connection between the second circuit board 32 and the connector 40.

[0110] It should be noted that the connector 40 can realize the electrical connection between the first circuit board 33 and the second circuit board 32 , so that one of the first circuit board 33 and the second circuit board 32 can receive the electrical signal generated by the other.

[0111] The technical solution of the embodiment of the present application reduces the use of wiring harnesses compared to connecting the connector 40 to the second circuit board 32 or the first circuit board 33 via a wiring harness, thereby reducing the weight of the high-voltage box assembly 30 and thereby reducing the weight of the battery device 1 and improving the energy density of the battery device 1. Furthermore, the connector 40 is plugged into the second circuit board 32, facilitating connection and removal of the connector 40 and the second circuit board 32, and reducing the difficulty of installation and maintenance.

[0112] Please refer to Figures 4 to 6 , and refer to Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of the connector provided in some embodiments of the present application. Figure 8 Schematic diagram of a connector connecting a second circuit board and a connecting post according to some embodiments of the present application. In some embodiments, the connector 40 includes a connector 41, which includes a first connecting section 411 having a connecting groove 4111 formed therein. The high-voltage box assembly 30 also includes a connecting post 322, one end of which is connected to the second circuit board 32, and the other end of which is engaged with the connecting groove 4111.

[0113] In some embodiments, the connector 41 may be made of conductive metal to achieve electrical connection between the first circuit board 33 and the second circuit board 32 .

[0114] In some embodiments, the connection pillars 322 may be made of conductive metal to achieve electrical connection between the first circuit board 33 and the second circuit board 32 .

[0115] In some embodiments, the surface of the connector 41 may be provided with a metal plating layer.

[0116] In some embodiments, the surface of the connection pillar 322 may be provided with a metal plating layer.

[0117] In some embodiments, the material of the connecting pillar 322 and the material of the connecting member 41 may be the same or different.

[0118] In some embodiments, the connecting pillar 322 can be connected to the second circuit board 32 by bolts, can be welded to the second circuit board 32 , or can be integrally formed with the second circuit board 32 .

[0119] In some embodiments, one end of the connecting column 322 is connected to the second circuit board 32, and the other end is connected to the connecting groove 4111. At least one of the inner walls of the connecting column 322 and the connecting groove 4111 can be deformed and have a reset tendency, so that the connecting column 322 and the connecting groove 4111 have an interference fit.

[0120] In some embodiments, the extending direction of the connecting pillar 322 may be perpendicular to the thickness direction of the second circuit board 32 , and the connecting pillar 322 may be connected to one side of the second circuit board 32 .

[0121] In some embodiments, the extension direction of the connection pillar 322 may intersect with the thickness direction of the second circuit board 32 , and the connection pillar 322 may be connected to a surface of the second circuit board 32 in the thickness direction.

[0122] In some embodiments, the extending direction of the connecting pillar 322 may be parallel to the thickness direction of the second circuit board 32 .

[0123] In some embodiments, the first connecting section 411 is formed with a connecting groove 4111 , and the first connecting section 411 can be formed with the connecting groove 4111 by machining or integral molding.

[0124] In some embodiments, the first connecting section 411 is formed with a connecting groove 4111 . The first connecting section 411 may include two oppositely disposed components, and a gap between the two oppositely disposed components forms the connecting groove 4111 .

[0125] The technical solution of the embodiment of the present application is to connect the second circuit board 32 by connecting one end of the connecting column 322 and clamping the other end into the connecting groove 4111 of the connecting member 41, which is conducive to improving the convenience of connecting the connector 40 to the second circuit board 32.

[0126] Please refer to Figure 6 In some embodiments, the connecting pillars 322 and the second circuit board 32 can be integrally formed. For example, a circuit board can be first produced, and then the connecting pillars 322 and the second circuit board 32 can be formed by trimming the circuit board.

[0127] In some embodiments, the second circuit board 32 and the connecting pillars 322 are integrally formed, and the second circuit board 32 and the connecting pillars 322 can be transported at the same time, which helps to improve the transport efficiency.

[0128] The technical solution of the embodiment of the present application improves the connection reliability between the connecting pillar 322 and the second circuit board 32 by integrally forming the connecting pillar 322 and the second circuit board 32 .

[0129] In some embodiments, the connector 41 includes two sub-connectors 412, which are arranged opposite each other. Each sub-connector 412 includes a main body 4121 and a protruding portion 4122. The protruding portion 4122 is connected to the end of the main body 4121 facing the second circuit board 32. The protruding portion 4122 of one sub-connector 412 protrudes from the main body 4121 in a direction closer to the other sub-connector 412. The gap between the two protruding portions 4122 forms a connecting groove 4111.

[0130] In some embodiments, the connector 41 includes two sub-connectors 412 , and the positions of the two sub-connectors 412 are relatively fixed, and the fixing method can be through other components in the connector 40 , such as the housing 43 of the connector 40 .

[0131] In some embodiments, the sub-connector 412 includes a main body 4121 and a protruding portion 4122 . The main body 4121 and the protruding portion 4122 may be integrally formed, and the main body 4121 and the protruding portion 4122 may be welded.

[0132] In some embodiments, one end of the sub-connector 412 can be welded to the first circuit board 33 , and the other end can be bent to form a protrusion 4122 , and the unbent portion of the sub-connector 412 is the main body 4121 .

[0133] In some embodiments, the protrusion 4122 may be an arc-shaped bent segment, and the gap between the two protrusions 4122 forms a connecting groove 4111. When the connecting post 322 is engaged with the connecting groove 4111, the two protrusions 4122 abut against two opposite surfaces of the connecting post 322.

[0134] In some embodiments, the two sub-connectors 412 may be disposed opposite to each other along the thickness direction of the connecting pillar 322 .

[0135] The technical solution of the embodiment of the present application forms a connecting groove 4111 through the gap between the two protrusions 4122. When the connecting column 322 is engaged with the connecting groove 4111, the protrusion 4122 is deformed, so that the two protrusions 4122 are interference fit with the connecting column 322, which helps to improve the reliability of the connection between the connecting column 322 and the connecting groove 4111.

[0136] Please refer to Figures 6 to 8 In some embodiments, in the first direction X, the two ends of the connecting post 322 are respectively connected to the second circuit board 32 and the sub-connector 412. In the first direction X, the distance L between the end surface of the connecting post 322 facing away from the second circuit board 32 and the protrusion 4122 satisfies the following: 1 mm ≤ L ≤ 4 mm.

[0137] In some embodiments, the first direction may be represented by the direction indicated by the letter X in the figure.

[0138] In some embodiments, the first direction X may be parallel to the length direction of the connecting column 322 , the thickness direction of the connecting column 322 may be parallel to the thickness direction of the second circuit board 32 , and the sub-connector 412 may extend along the first direction X.

[0139] In some embodiments, the first direction X may be parallel to the length direction of the connecting pillar 322 , the thickness direction of the second circuit board 32 may be parallel to the first direction X, and the sub-connector 412 may extend along the first direction X.

[0140] In some embodiments, the protrusion 4122 may be an arcuate segment, and the two protrusions 4122 may be symmetrically arranged along the central axis of the connecting post 322 in the first direction X. One protrusion 4122 has a contact point closest to the other protrusion 4122, and the two contact points respectively abut against two opposing surfaces of the connecting post 322. In the first direction X, the distance between the end surface of the connecting post 322 facing away from the second circuit board 32 and the contact point is L.

[0141] In some embodiments, in the first direction X, the distance between the end surface of the connecting column 322 facing away from the second circuit board 32 and the protrusion 4122 is L. If the above conditions are met, L can be any value of 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or a value between any two values.

[0142] In some embodiments, L = 2 mm.

[0143] In some embodiments, the sub-connector 412 may be made of copper alloy, such as copper-nickel-silicon, phosphor bronze, etc.

[0144] The technical solution of the embodiment of the present application sets the distance L between the end surface of the connecting post 322 facing away from the second circuit board 32 and the protrusion 4122 to meet the above conditions. When L is ≥ 1 mm, the risk of the connecting post 322 shaking in the first direction X and thus disengaging from the connecting groove 4111 is reduced, thereby improving the reliability of the connection between the connecting post 322 and the connecting groove 4111. When L is ≤ 4 mm, the dimensions of the connecting post 322 and the connecting groove 4111 in the first direction X are reduced, which helps save space on the mounting member 31.

[0145] Please refer to Figure 4 and Figure 5 , and refer to Figure 9 and Figure 10 , Figure 9 Schematic diagram of the partial structure of the connector provided in some other embodiments of the present application, Figure 10Schematic diagram of the structure of the second circuit board provided in some other embodiments of the present application. In some embodiments, the connector 40 includes a connector 41, the connector 41 includes a first connecting section 411, the second circuit board 32 is provided with a first connecting hole 321, and the first connecting section 411 is snap-fitted into the first connecting hole 321.

[0146] In some embodiments, the first connecting section 411 may be made of conductive metal, thereby achieving electrical connection between the first circuit board 33 and the second circuit board 32 .

[0147] In some embodiments, the inner wall of the first connection hole 321 may be made of conductive metal, thereby achieving electrical connection between the first circuit board 33 and the second circuit board 32 .

[0148] In some embodiments, the surface of the first connecting section 411 may be provided with a metal coating.

[0149] In some embodiments, the inner wall surface of the first connection hole 321 may be provided with a metal plating layer.

[0150] In some embodiments, the material of the first connecting section 411 and the material of the inner wall of the first connecting hole 321 may be the same or different.

[0151] In some embodiments, the first connecting section 411 is snapped into the first connecting hole 321, and one of the outer surface of the first connecting section 411 and the inner wall surface of the first connecting hole 321 can be deformed and has a reset tendency, so that the first connecting section 411 and the first connecting hole 321 have an interference fit.

[0152] In some embodiments, the first connection hole 321 may penetrate both end surfaces of the second circuit board 32 in the thickness direction.

[0153] In some embodiments, the first connection hole 321 may be provided on an end surface of the second circuit board 32 facing the first connection section 411 in the thickness direction.

[0154] In some embodiments, the first connection hole 321 can be formed on the second circuit board 32 by machining or integral molding.

[0155] The technical solution of the embodiment of the present application is to improve the convenience of connecting the connector 40 to the second circuit board 32 by snapping the first connecting section 411 into the first connecting hole 321 .

[0156] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10In some embodiments, the first connecting segment 411 includes a first sub-connecting segment 4112 and a second sub-connecting segment 4113. Along the first direction X, one end of the first sub-connecting segment 4112 facing the first circuit board 33 is connected to the other end of the second sub-connecting segment 4113 facing the first circuit board 33. In the second direction Y, portions of the first sub-connecting segment 4112 and portions of the second sub-connecting segment 4113 are spaced apart to form a cavity 4114. When the first connecting segment 411 is configured to be engaged with the first connecting hole 321, the first sub-connecting segment 4112 and the second sub-connecting segment 4113 move closer to each other to compress the cavity 4114. The first direction X is perpendicular to the second direction Y.

[0157] In some embodiments, the second direction may be represented by the direction indicated by the letter Y in the figure.

[0158] In some embodiments, the first direction X may be parallel to the thickness direction of the second circuit board 32 , and the second direction Y may be parallel to the width direction of the second circuit board 32 or the length direction of the second circuit board 32 .

[0159] In some embodiments, the first sub-connection segment 4112 and the second sub-connection segment 4113 may have the same structure and material.

[0160] In some embodiments, the first sub-connecting segment 4112 and the second sub-connecting segment 4113 may be symmetrically arranged relative to the axis of the first connecting segment in the first direction X.

[0161] In some embodiments, the end of the first sub-connecting segment 4112 facing the first circuit board 33 is connected to the end of the second sub-connecting segment 4113 facing the first circuit board 33, and the end of the first sub-connecting segment 4112 away from the first circuit board 33 can be connected to the end of the second sub-connecting segment 4113 away from the first circuit board 33. In other words, the first connecting segment 411 can have a fisheye structure. The first sub-connecting segment 4112 and the second sub-connecting segment 4113 are oppositely arranged arcuate segments. In the first direction X, one end of the first sub-connecting segment 4112 is connected to the end of the second sub-connecting segment 4113 in the same direction, and the other end of the first sub-connecting segment 4112 is connected to the other end of the second sub-connecting segment 4113 in the same direction. A portion of the first sub-connecting segment 4112 and a portion of the second sub-connecting segment 4113 are spaced apart along the second direction Y. The gap between the first sub-connecting segment 4112 and the second sub-connecting segment 4113 in the second direction Y forms a cavity 4114. The first sub-connecting segment 4112 has a contact point farthest from the second sub-connecting segment 4113, and the second sub-connecting segment 4113 has a contact point farthest from the first sub-connecting segment 4112. These two contact points respectively abut two inner wall surfaces of the first connecting hole 321 that oppose each other in the second direction Y. When the first connecting segment 411 is engaged with the first connecting hole 321, the first connecting hole 321 squeezes the two contact points, causing the first sub-connecting segment 4112 and the second sub-connecting segment 4113 to elastically deform along the second direction Y, bringing the first sub-connecting segment 4112 and the second sub-connecting segment 4113 closer together, thereby compressing the cavity 4114. Both the first sub-connecting segment 4112 and the second connecting segment 4113 have a tendency to return to their original position, causing them to move away from each other, thereby achieving an interference fit between the first connecting segment 411 and the first connecting hole 321.

[0162] In some embodiments, along the first direction X, different portions of the first connecting sub-segment 4112 have the same size in the second direction Y.

[0163] In some embodiments, along the first direction X, different portions of the second connecting sub-segment 4113 have the same size in the second direction Y.

[0164] In some embodiments, the first connecting section 411 may be made of copper alloy, such as copper-nickel-silicon, phosphor bronze, etc.

[0165] In some embodiments, one end of the first connecting sub-segment 4112 facing the first circuit board 33 is connected to one end of the second connecting sub-segment 4113 facing the first circuit board 33, and the other portions of the first connecting sub-segment 4112 and the second connecting sub-segment 4113 may be spaced apart along the second direction Y. When the first connecting segment 411 is engaged with the first connecting hole 321, the spaced-apart portions of the first connecting sub-segment 4112 and the second connecting sub-segment 4113 are extended into the first connecting hole 321, so that the spaced-apart portions of the first connecting sub-segment 4112 and the second connecting sub-segment 4113 approach each other and the spaced-apart portions of the first connecting sub-segment 4112 and the second connecting sub-segment 4113 tend to move away from each other, thereby achieving an interference fit between the first connecting segment 411 and the first connecting hole 321.

[0166] According to the technical solution of the embodiment of the present application, when the first connecting section 411 is engaged with the first connecting hole 321, the first sub-connecting section 4112 and the second sub-connecting section 4113 approach each other, so that the cavity 4114 is compressed, and the first sub-connecting section 4112 and the second sub-connecting section 4113 tend to move away from each other, thereby forming an interference fit with the first connecting hole 321, which is beneficial to improving the reliability of the first connecting section 411 being engaged with the first connecting hole 321.

[0167] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10 In some embodiments, along the first direction X, one end of the first connecting sub-segment 4112 away from the first circuit board 33 is connected to one end of the second connecting sub-segment 4113 away from the first circuit board 33 .

[0168] The technical solution of the embodiment of the present application is to connect one end of the first sub-connecting segment 4112 with one end of the second sub-connecting segment 4113, and connect the other end of the first sub-connecting segment 4112 with the other end of the second sub-connecting segment 4113, thereby forming a cavity 4114 with both ends closed in the first direction X, which is beneficial to improving the structural strength of the first connecting segment 411, thereby improving the reliability of the first connecting segment 411 being snapped into the first connecting hole 321.

[0169] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10 In some embodiments, the connector 40 further includes an elastic member 42, which is disposed in the cavity 4114. In the second direction Y, both ends of the elastic member 42 abut against the first sub-connecting segment 4112 and the second sub-connecting segment 4113, respectively.

[0170] In some embodiments, the elastic member 42 may be a spring, a torsion spring, a plastic ring, etc.

[0171] In some embodiments, when the first connecting section 411 is engaged with the first connecting hole 321, the first connecting hole 321 squeezes the two contact points, causing the first sub-connecting section 4112 and the second sub-connecting section 4113 to elastically deform along the second direction Y, bringing the first sub-connecting section 4112 and the second connecting section 413 closer to each other, thereby compressing the cavity 4114 and the elastic member 42 along the second direction Y. At this time, the elastic member 42 has an elastic force that resets along the second direction Y, causing the first sub-connecting section 4112 and the second connecting section 413 to have a reset tendency, causing the first sub-connecting section 4112 and the second sub-connecting section 4113 to have a tendency to move away from each other, thereby achieving an interference fit between the first connecting section 411 and the first connecting hole 321.

[0172] In some embodiments, the elastic member 42 may be made of carbon spring steel, cobalt-chromium-nickel alloy, natural rubber, etc.

[0173] In some embodiments, the number of the elastic member 42 may be one, and both ends of the elastic member 42 correspond to two contact points in the second direction Y respectively.

[0174] In some embodiments, there may be a plurality of elastic members 42 , and the plurality of elastic members 42 are spaced apart along the first direction X.

[0175] According to the technical solution of the embodiment of the present application, when the first connecting section 411 is engaged with the first connecting hole 321, the elastic member 42 is compressed, so that the elastic member 42 has a tendency to reset, thereby making the first connecting section 411 and the first connecting hole 321 interference fit, which is beneficial to improving the reliability of the first connecting section 411 being engaged with the first connecting hole 321.

[0176] Please refer to Figures 4 to 7 , and refer to Figure 11 , Figure 11 Schematic diagram of a first circuit board provided in some embodiments of the present application. In some embodiments, connector 40 includes a connector 41, which includes a second connecting segment 413 facing away from the second circuit board 32. The first circuit board 33 is provided with a second connecting hole 331, and the second connecting segment 413 is inserted into the second connecting hole 331 and soldered to the first circuit board 33.

[0177] In some embodiments, the second connecting section 413 may be made of conductive metal, thereby achieving electrical connection between the first circuit board 33 and the second circuit board 32 .

[0178] In some embodiments, the inner wall of the second connection hole 331 may be made of conductive metal, thereby achieving electrical connection between the first circuit board 33 and the second circuit board 32 .

[0179] In some embodiments, the surface of the second connecting section 413 may be provided with a metal plating layer.

[0180] In some embodiments, the inner wall surface of the second connection hole 331 may be provided with a metal plating layer.

[0181] In some embodiments, the material of the second connecting section 413 and the material of the inner wall of the second connecting hole 331 may be the same or different.

[0182] In some embodiments, the second connection hole 331 may penetrate both end surfaces of the first circuit board 33 in the thickness direction.

[0183] In some embodiments, the second connection hole 331 may be provided on an end surface of the first circuit board 33 facing the second connection section 413 in the thickness direction.

[0184] In some embodiments, the second connection hole 331 can be formed on the first circuit board 33 by machining or integral molding.

[0185] In some embodiments, the extension direction of the second connecting section 413 may be parallel to the thickness direction of the first circuit board 33 .

[0186] In some embodiments, the second connecting segment 413 may extend along the first direction X or the second direction Y.

[0187] In some embodiments, the inner diameter of the second connecting hole 331 can be the same as the outer diameter of the second connecting section 413, so that the second connecting hole 331 and the second connecting section 413 can match. When the second connecting section 413 is passed through the second connecting hole 331, the second connecting section 413 is connected to the first circuit board 33 by welding.

[0188] In some embodiments, the soldering method may be wave soldering, through-hole reflow soldering, selective wave soldering, etc.

[0189] In some embodiments, the high-voltage box assembly 30 may further include an insulating member 34, which is disposed on a surface of the first circuit board 33 facing away from the second circuit board 32. When the second connecting segment 413 is inserted into the second connecting hole 331, the end of the second connecting segment 413 that passes through the second connecting hole 331 abuts against the insulating member 34, thereby reducing the risk of the second connecting segment 413 contacting other components and causing a short circuit after passing through the second connecting hole 331.

[0190] In some embodiments, the insulating member 34 may be made of plastic, rubber, or the like.

[0191] In some embodiments, the insulating member 34 and the first circuit board 33 may be connected by bonding or integral molding.

[0192] In some embodiments, the connector 41 may include two sub-connectors 412, which are disposed opposite each other. Correspondingly, the first circuit board 33 may be provided with two second connection holes 331 spaced apart from each other, with the second connection segment 413 of one sub-connector 412 passing through one second connection hole 331, and the second connection segment 413 of the other sub-connector 412 passing through the other second connection hole 331.

[0193] It should be noted that, during the production process, the first circuit board 33 and the second connecting section 413 may be welded together before the first connecting section 411 is plugged into the second circuit board 32 .

[0194] The technical solution of the embodiment of the present application helps to improve the reliability of the connection between the second connecting section 413 and the first circuit board 33 by welding the second connecting section 413 to the first circuit board 33.

[0195] Please refer to Figures 4 to 7 , and refer to Figure 12 , Figure 12 Schematic diagram of a housing provided in some embodiments of the present application. In some embodiments, there are multiple connectors 41, which are spaced apart. Connector 40 also includes a housing 43 made of an insulating material. Housing 43 has multiple spaced apart first through-holes 431, with each connector 41 passing through one of the first through-holes 431.

[0196] In some embodiments, there are multiple connectors 41, which can extend along the thickness direction of the first circuit board 33. The connector 41 can include two sub-connectors 412, which can be arranged opposite each other along the width direction of the first circuit board 33. The multiple connectors 41 can be spaced apart along the length direction of the first circuit board 33. Providing multiple connectors 41 helps improve the efficiency of the connector 40 in transmitting electrical signals.

[0197] In some embodiments, the shell 43 is made of insulating material to reduce the risk of short circuits between the connectors 41 .

[0198] In some embodiments, the shell 43 may be made of ceramic-based materials, polymer-based composite materials, glass fiber, etc.

[0199] In some embodiments, the connector 41 may include two sub-connectors 412, which are disposed opposite each other. Correspondingly, the housing 43 may have two first through holes 431 spaced apart from each other, with one sub-connector 412 passing through one first through hole 431 and the other sub-connector 412 passing through the other first through hole 431.

[0200] In some embodiments, a second through hole 432 may be provided on the side of the shell 43 facing the second circuit board 32, one end of the connecting column 322 is connected to the second circuit board 32, and the other end is clamped in the connecting groove 4111, and the other end of the connecting column 322 is inserted into the second through hole 432.

[0201] The technical solution of the embodiment of the present application reduces the risk of interference between the multiple connecting members 41 by installing the multiple connecting members 41 one by one in the respective first through holes 431 of the housing 43, which helps to improve the reliability of the installation of the connecting members 41.

[0202] Please refer to Figures 4 to 7 、 Figure 12 In some embodiments, the connector 40 further includes a plurality of barriers 44, which are connected to the housing 43 and are located between any two adjacent connectors 41. The barrier 44 is made of insulating material.

[0203] In some embodiments, the barrier 44 may be located between any two adjacent second connecting segments 413 .

[0204] In some embodiments, the barrier 44 may be located between any two adjacent first connecting segments 411 .

[0205] In some embodiments, a portion of the barrier 44 may be located between any two adjacent second connecting segments 413 , and another portion of the barrier 44 may be located between any two adjacent first connecting segments 411 .

[0206] In some embodiments, the two parts of the barrier 44 may be connected to each other.

[0207] In some embodiments, the two parts of the barrier 44 can be independent of each other.

[0208] In some embodiments, the material of the barrier 44 can be ceramic-based materials, polymer-based composite materials, glass fiber, etc.

[0209] In some embodiments, the barrier 44 may be integrally formed with the housing 43 .

[0210] In some embodiments, the barrier member 44 may be bonded to the housing 43 , fastened with bolts, or the like.

[0211] The technical solution of the embodiment of the present application helps to reduce the risk of electrical effects occurring between two adjacent connecting members 41 by providing a barrier member 44 between the two adjacent connecting members 41 .

[0212] Please refer to Figures 4 to 7 、 Figure 11 and Figure 12In some embodiments, the first circuit board 33 is provided with a third connection hole 332 , one end of the barrier 44 is connected to the housing 43 , and the other end is inserted into the third connection hole 332 .

[0213] In some embodiments, the third connection hole 332 may penetrate both end surfaces of the first circuit board 33 in the thickness direction.

[0214] In some embodiments, the third connection hole 332 may be provided on an end surface of the first circuit board 33 facing the second connection section 413 in the thickness direction.

[0215] In some embodiments, the second connection hole 331 can be formed on the first circuit board 33 by machining or integral molding.

[0216] In some embodiments, the inner diameter of the third connection hole 332 may be the same as the outer diameter of the barrier 44 , so that the third connection hole 332 and the barrier 44 can match.

[0217] In some embodiments, the extending direction of the barrier 44 may be parallel to the thickness direction of the first circuit board 33 .

[0218] In some embodiments, a portion of the barrier member 44 may be located between any two adjacent second connecting segments 413, and another portion of the barrier member 44 may be located between any two adjacent first connecting segments 411. The two portions of the barrier member 44 may be independent. One end of the first portion of the barrier member 44 is inserted into the third connecting hole 332, and the other portion of the first portion of the barrier member 44 is connected to the housing 43.

[0219] In some embodiments, the second circuit board 32 defines a fifth connection hole 323 . One end of the second portion of the barrier 44 is inserted into the fifth connection hole 323 , and the other end of the second portion of the barrier 44 is connected to the housing 43 .

[0220] In some embodiments, the third connection hole 332 may penetrate both end surfaces of the second circuit board 32 in the thickness direction.

[0221] In some embodiments, the fifth connection hole 323 may be provided on an end surface of the second circuit board 32 facing the first connection section 411 in the thickness direction.

[0222] In some embodiments, the fifth connection hole 323 can be formed on the second circuit board 32 by machining or integral molding.

[0223] In some embodiments, the inner diameter of the fifth connection hole 323 may be the same as the outer diameter of the barrier 44 , so that the fifth connection hole 323 and the barrier 44 can match each other.

[0224] The technical solution of the embodiment of the present application helps to improve the reliability of the connection between the connector 40 and the first circuit board 33 by inserting the barrier member 44 into the third connection hole 332 .

[0225] In some embodiments, the material of the shell 43 includes at least one of a ceramic-based material, a polymer-based composite material, and glass fiber.

[0226] According to the technical solution of the embodiment of the present application, ceramic-based materials, polymer-based composite materials, and glass fibers have good high-temperature resistance. By setting the material of the shell 43 to at least one of the ceramic-based materials, polymer-based composite materials, and glass fibers, the risk of damaging the shell 43 by welding the connector 40 to the first circuit board 33 is reduced, which helps to improve the reliability of the battery device 1.

[0227] Please refer to Figures 4 to 7 、 Figure 11 and Figure 12 In some embodiments, the first circuit board 33 is provided with a fourth connection hole 333 , and the connector 40 further includes a fixing member 45 , one end of the fixing member 45 is connected to the housing 43 , and the other end is inserted into the fourth connection hole 333 .

[0228] In some embodiments, the fourth connection hole 333 may penetrate both end surfaces of the first circuit board 33 in the thickness direction.

[0229] In some embodiments, the fourth connection hole 333 may be provided on an end surface of the first circuit board 33 facing the second connection section 413 in the thickness direction.

[0230] In some embodiments, the fourth connection hole 333 can be formed on the first circuit board 33 by machining or integral molding.

[0231] In some embodiments, a protrusion may be provided at one end of the fixing member 45 facing the first circuit board 33 , and the protrusion is inserted into the fourth connection hole 333 .

[0232] In some embodiments, the number of protrusions of a fixing member 45 may be two, the number of fourth connection holes 333 may correspond to the number of protrusions, and one protrusion is inserted into one fourth connection hole 333 .

[0233] In some embodiments, there may be two fixing members 45 , which are respectively disposed on two sides of the housing 43 .

[0234] In some embodiments, the housing 43 may be provided with a third through hole 433, which may be formed in the housing 43 by machining or integral molding. The end of the fixing member 45 facing away from the first circuit board 33 is passed through the third through hole 433 and is engaged with the third through hole 433.

[0235] In some embodiments, a first flange may be provided at one end of the fixing member 45 facing away from the first circuit board 33. When installing the fixing member 45, the fixing member 45 is passed through the third through hole 433 from the end of the shell 43 facing away from the first circuit board 33, so that the end of the fixing member 45 with the protrusion is inserted into the fourth connecting hole 333, and at the same time, the first flange abuts against the end face of the shell 43 facing away from the first circuit board 33.

[0236] In some embodiments, the fixing member 45 may also be provided with a second flange. When the fixing member 45 is installed, the fixing member 45 is inserted into the third through hole 433 from the end of the housing 43 facing away from the first circuit board 33, so that the end of the fixing member 45 provided with the protrusion is inserted into the fourth connection hole 333. At this time, the second flange is located in the third through hole 433, causing the second flange to elastically deform and be abutted and compressed by the inner wall of the third through hole 433. The second flange has an elastic force to return to its original position, so that the second flange and the third through hole 433 have an interference fit.

[0237] In some embodiments, the inner wall of the third through hole 433 may also be provided with a groove portion corresponding to the second flange. When the second flange enters the third through hole 433, the positions of the second flange and the groove portion correspond. The groove portion provides space for the second flange to be reset, so that the second flange enters the groove portion after being reset, thereby realizing that the second flange is clamped in the groove portion.

[0238] The technical solution of the embodiment of the present application connects the housing 43 and the first circuit board 33 through the fixing member 45 , which helps to improve the reliability of the connection between the connector 40 and the first circuit board 33 .

[0239] In some embodiments, the hardness of the fixing member 45 is greater than the hardness of the connecting member 41 .

[0240] Because connector 41 needs to elastically deform when connected to first circuit board 33, connector 41 can be made of a flexible metal. In some embodiments, connector 41 can be made of a copper alloy, such as copper-nickel-silicon or phosphor bronze. To reduce the risk of connection failure due to insufficient strength of connector 41 after welding to second circuit board 32, a fixing member 45 is provided to connect housing 43 and second circuit board 32, supporting connector 41. In some embodiments, fixing member 45 can be made of a hard alloy, such as tungsten carbide or titanium carbide.

[0241] The technical solution of the embodiment of the present application is beneficial to improving the reliability of the connection between the connector 40 and the first circuit board 33 by setting the hardness of the fixing member 45 to be greater than the hardness of the connecting member 41.

[0242] An embodiment of the present application further provides an electrical device, comprising the battery device 1 according to any one of the above embodiments, wherein the battery device 1 is used to provide electrical energy to the electrical device.

[0243] Please refer to Figures 4 to 8 In some embodiments, the battery device 1 includes a housing 10, a battery cell 20, and a high-voltage box assembly 30. The battery cell 20 is disposed in the housing 10. The high-voltage box assembly 30 includes a mounting member 31, a second circuit board 32, a first circuit board 33, and a connector 40. The second circuit board 32 and the first circuit board 33 are both connected to the mounting member 31. The mounting member 31 is connected to the housing 10. The first circuit board 33 is connected to the battery cell 20 for collecting information from the battery cell 20 and generating electrical signals. The second circuit board 32 is used to receive electrical signals. One end of the connector 40 is welded to the first circuit board 33, and the other end is plugged into the second circuit board 32.

[0244] In some embodiments, the first circuit board 33 is a CSC printed circuit board, and the second circuit board 32 is a BMU printed circuit board.

[0245] In some embodiments, the connector 40 may include a connector 41, which includes a first connecting section 411 and a second connecting section 413 connected to each other. The first connecting section 411 is formed with a connecting groove 4111. The high-voltage box assembly 30 also includes a connecting post 322, one end of which is connected to the second circuit board 32, and the other end of which is snap-fitted into the connecting groove 4111. The second connecting section 413 is welded to the first circuit board 33.

[0246] The technical solution of the embodiment of the present application is to connect the second circuit board 32 and the first circuit board 33 to the mounting member 31 so that the distance between the second circuit board 32 and the first circuit board 33 is closer, and one end of the connector 40 is welded to the first circuit board 33 and the other end is plugged into the second circuit board 32. Compared with connecting the connector 40 and the second circuit board 32 through a wiring harness or connecting the connector 40 and the first circuit board 33 through a wiring harness, the use of wiring harnesses is reduced, costs are saved, and the weight of the high-voltage box assembly 30 is reduced, thereby reducing the weight of the battery device 1 and improving the energy density of the battery device 1.

[0247] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Box; A battery cell is disposed in the box; A high-voltage box assembly includes a mounting member, a first circuit board, a second circuit board and a connector. The first circuit board and the second circuit board are both connected to the mounting member, and the mounting member is connected to the box body. One of the first circuit board and the second circuit board is connected to the battery cell to collect information about the battery cell and generate an electrical signal, and the other is used to receive the electrical signal. One end of the connector is welded to the first circuit board, and the other end is plugged into the second circuit board.

2. The battery device according to claim 1, wherein: The connector includes a connecting piece, the connecting piece includes a first connecting section, and the first connecting section is formed with a connecting groove; The high-voltage box assembly further includes a connecting column, one end of which is connected to the second circuit board, and the other end of which is clamped in the connecting groove.

3. The battery device according to claim 2, characterized in that The connecting member includes two sub-connecting members, and the two sub-connecting members are arranged opposite to each other; Each of the sub-connectors includes a main body and a protruding portion, wherein the protruding portion is connected to one end of the main body facing the second circuit board. The protruding portion of one sub-connector protrudes from the main body in a direction approaching the other sub-connector, and the gap between the two protruding portions forms the connecting groove.

4. The battery device according to claim 3, characterized in that In the first direction, two ends of the connecting column are respectively connected to the second circuit board and the sub-connector; In the first direction, a distance L between an end surface of the connecting column facing away from the second circuit board and the protruding portion satisfies: 1 mm ≤ L ≤ 4 mm.

5. The battery device according to claim 1, wherein: The connector includes a connecting piece, the connecting piece includes a first connecting section, the second circuit board is provided with a first connecting hole, and the first connecting section is clamped in the first connecting hole.

6. The battery device according to claim 5, characterized in that The first connecting section includes a first sub-connecting section and a second sub-connecting section. Along a first direction, one end of the first sub-connecting section facing the first circuit board is connected to one end of the second sub-connecting section facing the first circuit board. In the second direction, part of the first sub-connecting segment and part of the second sub-connecting segment are spaced apart to form a cavity. When the first connecting segment is configured to be snapped into the first connecting hole, the first sub-connecting segment and the second sub-connecting segment approach each other to compress the cavity. The first direction is perpendicular to the second direction.

7. The battery device according to claim 6, characterized in that Along the first direction, one end of the first sub-connection segment away from the first circuit board is connected to one end of the second sub-connection segment away from the first circuit board.

8. The battery device according to claim 6, characterized in that The connector further includes an elastic member disposed in the cavity. In the second direction, two ends of the elastic member respectively abut against the first sub-connecting segment and the second sub-connecting segment.

9. The battery device according to claim 1, wherein: The connector includes a connecting member, and the connecting member includes a second connecting section facing away from the second circuit board; The first circuit board is provided with a second connecting hole, the second connecting section is passed through the second connecting hole, and the second connecting section is welded to the first circuit board.

10. The battery device according to any one of claims 2 to 9, characterized in that: There are multiple connecting pieces, and the multiple connecting pieces are arranged at intervals; The connector further comprises a shell, the material of the shell is an insulating material, the shell is provided with a plurality of first through holes arranged at intervals, and one of the connecting members is correspondingly passed through one of the first through holes.

11. The battery device according to claim 10, characterized in that The connector further comprises a plurality of barrier members, wherein the barrier members are connected to the housing and are located between any two adjacent connectors; the barrier members are made of insulating material.

12. The battery device according to claim 11, wherein: The first circuit board is provided with a third connecting hole. One end of the barrier is connected to the housing, and the other end is inserted into the third connecting hole.

13. The battery device according to claim 10, wherein: The material of the shell includes at least one of a ceramic-based material, a polymer-based composite material, and glass fiber.

14. The battery device according to claim 10, characterized in that The first circuit board is provided with a fourth connection hole, and the connector further includes a fixing member, one end of the fixing member is connected to the housing, and the other end is inserted into the fourth connection hole; The hardness of the fixing member is greater than the hardness of the connecting member.

15. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 14, wherein the battery device is used to provide electrical energy to the electrical device.

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