Battery device and electric device

Abstract

The embodiment of the present application 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 monomer is arranged in the box body. The high-voltage box assembly comprises a mounting piece, a first circuit board, a second circuit board and a connector. The first circuit board and the second circuit board are connected with the mounting piece, the mounting piece is connected with the box body, one of the first circuit board and the second circuit board is connected with the battery monomer, so as to collect information of the battery monomer and generate an electric signal, and the other is used for receiving the electric signal. One end of the connector is welded with the first circuit board, and the other end is inserted with the second circuit board. The technical scheme provided by the present application can improve the energy density of the battery device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, in particular to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the development of battery technology, how to improve the energy density of the battery device is a technical problem that needs to be solved in battery technology. SUMMARY

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

[0005] The present application is realized by the following technical scheme:

[0006] In a first aspect, the present application provides a battery device, which includes a box body, a battery monomer and a high-voltage box assembly. The battery monomer is arranged in the box body. The high-voltage box assembly includes a mounting piece, 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 piece. The mounting piece is connected to the box body. One of the first circuit board and the second circuit board is connected to the battery monomer for collecting information of the battery monomer and generating an electrical signal. The other one is used for receiving the electrical signal. One end of the connector is welded to the first circuit board, and the other end of the connector is inserted into the second circuit board.

[0007] The technical scheme of the present application embodiment makes the distance between the second circuit board and the first circuit board close by connecting the second circuit board and the first circuit board to the mounting piece. One end of the connector is welded to the first circuit board, and the other end of the connector is inserted into the second circuit board. Compared with connecting the connector and the second circuit board by a wire harness or connecting the connector and the first circuit board by a wire harness, the use of the wire harness is reduced, the cost is saved, the weight of the high-voltage box assembly is reduced, the weight of the battery device is reduced, and the energy density of the battery device is improved. At the same time, the connector is inserted into the second circuit board, which facilitates the connection and disconnection of the connector and the second circuit board, and reduces the difficulty of installation and maintenance.

[0008] In some embodiments, the connector includes a connecting piece, and the connecting piece includes a first connecting segment. The first connecting segment is formed with a connecting groove. The high-voltage box assembly further 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.

[0009] The technical scheme of the embodiment of the application connects the second circuit board through one end of the connecting column and clamps the other end of the connecting column in the connecting groove of the connecting piece, thereby improving the convenience of the connector in connecting the second circuit board.

[0010] In some embodiments, the connecting piece includes two sub-connecting pieces arranged oppositely. Each sub-connecting piece includes a body part and a protruding part connected to one end of the body part facing the second circuit board, and the protruding part of one sub-connecting piece protrudes from the body part in a direction close to the other sub-connecting piece, and the gap between the two protruding parts forms the connecting groove.

[0011] The technical scheme of the embodiment of the application forms the connecting groove through the gap between the two protruding parts, and when the connecting column is clamped in the connecting groove, the protruding parts are deformed, so that the two protruding parts are in interference fit with the connecting column, thereby improving the reliability of the connection between the connecting column and the connecting groove.

[0012] In some embodiments, in the first direction, the two ends of the connecting column are connected to the second circuit board and the sub-connecting piece, respectively. In the first direction, the distance between the end surface of the connecting column away from the second circuit board and the protruding part is L, which satisfies: 1mm≤L≤4mm.

[0013] The technical scheme of the embodiment of the application sets the distance L between the end surface of the connecting column away from the second circuit board and the protruding part to satisfy the above condition, when L≥1mm, the risk of the connecting column shaking in the first direction and thus disengaging from the connecting groove can be reduced, thereby improving the reliability of the connection between the connecting column and the connecting groove. When L≤4mm, the size of the connecting column and the connecting groove in the first direction is small, thereby saving the space of the mounting piece.

[0014] In some embodiments, the connector includes a connecting piece, and the connecting piece includes a first connecting section, and the second circuit board is provided with a first connecting hole, and the first connecting section is clamped in the first connecting hole.

[0015] The technical scheme of the embodiment of the application clamps the first connecting section in the first connecting hole, thereby improving the convenience of the connector in connecting the second circuit board.

[0016] In some embodiments, the first connecting section includes a first sub-connecting section and a second sub-connecting section, and in the 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 section and part of the second sub-connecting section are arranged at intervals to form a cavity, and when the first connecting section is configured to be clamped in the first connecting hole, the first sub-connecting section and the second sub-connecting section are close to each other to compress the cavity, and the first direction is perpendicular to the second direction.

[0017] The technical scheme 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 are close to each other, so that the cavity is compressed, so that the first sub-connecting section and the second sub-connecting section have a tendency to move away from each other, thereby being in interference fit with the first connecting hole, which is beneficial to improve the reliability of the clamping of the first connecting section in the first connecting hole.

[0018] In some embodiments, along the first direction, one end of the first sub-connecting section away from the first circuit board is connected with one end of the second sub-connecting section away from the first circuit board.

[0019] The technical scheme of the embodiment of the present application, by connecting one end of the first sub-connecting section with one end of the second sub-connecting section, and connecting the other end of the first sub-connecting section with the other end of the second sub-connecting section, a cavity is formed which is closed at both ends in the first direction, which is beneficial to improve the structural strength of the first connecting section, thereby improving the reliability of the clamping of the first connecting section in the first connecting hole.

[0020] In some embodiments, the connector further comprises an elastic member, the elastic member is arranged in the cavity, and in the second direction, both ends of the elastic member abut against the first sub-connecting section and the second sub-connecting section, respectively.

[0021] The technical scheme 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 in interference fit with the first connecting hole, which is beneficial to improve the reliability of the clamping of the first connecting section in the first connecting hole.

[0022] In some embodiments, the connector comprises a connecting member, the connecting member comprises a second connecting section away from the second circuit board. The first circuit board is provided with a second connecting hole, the second connecting section is arranged through the second connecting hole, and the second connecting section is welded to the first circuit board.

[0023] The technical scheme of the embodiment of the present application, by welding the second connecting section to the first circuit board, it is beneficial to improve the reliability of the connection of the second connecting section to the first circuit board.

[0024] In some embodiments, the number of connecting members is multiple, and the multiple connecting members are arranged at intervals. The connector further comprises a housing, the material of the housing is insulating material, the housing is provided with multiple first through holes arranged at intervals, and one connecting member is arranged through one first through hole.

[0025] The technical scheme of the embodiment of the present application, by installing the multiple connecting members one by one in the respective first through holes of the housing, the risk of interference of the multiple connecting members is reduced, which is beneficial to improve the reliability of the installation of the connecting members.

[0026] In some embodiments, the connector further comprises multiple blocking members, the blocking members are connected to the housing, and the blocking members are located between any two adjacent connecting members. The material of the blocking member is insulating material.

[0027] The technical scheme of the embodiment of the application is arranged with the blocking piece between the two adjacent connecting pieces, which is conducive to reducing the risk of electrical effect of the two adjacent connecting pieces.

[0028] In some embodiments, the first circuit board is provided with a third connecting hole, one end of the blocking piece is connected to the shell, and the other end is inserted into the third connecting hole.

[0029] The technical scheme of the embodiment of the application is inserted into the third connecting hole, which is conducive to improving the reliability of the connector connecting the first circuit board.

[0030] In some embodiments, the material of the shell includes at least one of a ceramic-based material, a polymer-based composite material, and a glass fiber.

[0031] The technical scheme of the embodiment of the application is arranged with the blocking piece between the two adjacent connecting pieces, which is conducive to reducing the risk of electrical effect of the two adjacent connecting pieces.

[0032] In some embodiments, the first circuit board is provided with a fourth connecting hole, and the connector further includes a fixing piece, one end of the fixing piece is connected to the shell, and the other end is inserted into the fourth connecting hole.

[0033] The technical scheme of the embodiment of the application is arranged with the blocking piece between the two adjacent connecting pieces, which is conducive to reducing the risk of electrical effect of the two adjacent connecting pieces.

[0034] In some embodiments, the hardness of the fixing piece is greater than the hardness of the connecting piece.

[0035] The technical scheme of the embodiment of the application is arranged with the blocking piece between the two adjacent connecting pieces, which is conducive to reducing the risk of electrical effect of the two adjacent connecting pieces.

[0036] In the second aspect, the application further provides a power utilization device, which includes the battery device of any one of the embodiments of the first aspect, and the battery device is used to provide electric energy for the power utilization device.

[0037] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor under the premise of the drawings.

[0039] Figure 1 The structural schematic diagram of the vehicle provided for some embodiments of the present application;

[0040] Figure 2 The structural exploded schematic diagram of the battery device provided for some embodiments of the present application;

[0041] Figure 3 The structural exploded schematic diagram of the battery cell provided for some embodiments of the present application;

[0042] Figure 4 The structural schematic diagram of the high-voltage box assembly provided for some embodiments of the present application;

[0043] Figure 5 The structural schematic diagram of the connector connecting the second circuit board and the first circuit board provided for some embodiments of the present application;

[0044] Figure 6 The structural exploded diagram of Figure 5 ;

[0045] Figure 7 The structural schematic diagram of the connecting piece provided for some embodiments of the present application;

[0046] Figure 8 The structural schematic diagram of the connector connecting the second circuit board and the connecting column provided for some embodiments of the present application;

[0047] Figure 9 The partial structural schematic diagram of the connecting piece provided for some other embodiments of the present application;

[0048] Figure 10 The structural schematic diagram of the second circuit board provided for some other embodiments of the present application;

[0049] Figure 11 The structural schematic diagram of the first circuit board provided for some embodiments of the present application;

[0050] Figure 12 The structural schematic diagram of the shell provided for some embodiments of the present application.

[0051] Icon: 1-battery device; 10-box body; 11-first sub-box body; 12-second sub-box body; 20-battery cell; 21-battery cell shell; 22-housing; 23-end cover; 24-electrode assembly; 25-electrode terminal; 30-high-voltage box assembly; 31-mount; 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 piece; 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-body part; 4122-protruding part; 413-second connecting section; 42-elastic piece; 43-housing; 431-first through hole; 432-second through hole; 433-third through hole; 44-stop piece; 45-fixing piece; 100-vehicle; 110-controller; 120-motor; X-first direction; Y-second direction. DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0054] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0055] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] The term "and / or" in the present application only describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, the second circuit board and / or the first circuit board can mean that there are three cases of only the second circuit board, both the second circuit board and the first circuit board, and only the first circuit board. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in an "or" relationship.

[0057] "Multiple" appearing in the present application refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0058] The battery device mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel, or mixed connection through a busbar component.

[0059] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0060] In some embodiments, the battery device can be a battery pack, which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0061] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0062] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0063] As an example, the box body can include a first sub-box body and a second sub-box body. The first sub-box body and the second sub-box body are buckled to form a closed space inside the box body to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first sub-box body can be a top cover or a bottom plate.

[0064] As an example, the box can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that an enclosed space is formed inside the box to accommodate the battery cell assembly.

[0065] As an example, the box can be part of a chassis structure of a vehicle. For example, the top cover of the box can be at least part of a floor of the vehicle, or the frame of the box can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0066] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0067] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0068] The battery cell can be, but is not limited to, a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc.

[0069] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0070] In some embodiments, the positive electrode can be a positive electrode tab, which can include a positive electrode current collector and a positive electrode active material arranged on at least one surface of the positive electrode current collector.

[0071] As an example, the positive electrode current collector has two opposite surfaces in the thickness direction thereof, and the positive electrode active material is arranged on any one or both of the two opposite surfaces of the positive electrode current collector.

[0072] As an example, the positive electrode current collector can adopt a metal foil or a composite current collector. For example, as a metal foil, aluminum with silver plating treatment on the surface, stainless steel with silver plating treatment on the surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a high polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a high polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0073] As an example, the positive electrode active material can include at least one of lithium-containing phosphates, lithium transition metal oxides, and modified compounds of each thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material can also be used.

[0074] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0075] As an example, the negative electrode current collector can employ a metal foil or a composite current collector. For example, as a metal foil, aluminum with a silver plating surface treatment, stainless steel with a silver plating surface treatment, stainless steel, copper, aluminum, nickel, a carbon electrode, and the like with carbon, nickel, or titanium can be employed.

[0076] In some embodiments, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is disposed on either one or both of the two surfaces of the negative electrode current collector.

[0077] As an example, the negative electrode active material can employ a negative electrode active material for a battery known in the art. As an example, the negative electrode active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, lithium titanate, and the like. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery negative electrode active material can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0078] In some embodiments, the separator is a separator film. The present application does not have a particular limitation on the type of separator film, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0079] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride, and ceramic. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate member located between the positive and negative electrodes, or can be attached to the surface of the positive and negative electrodes.

[0080] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive and negative electrodes, and functions to transport ions and separate the positive and negative electrodes.

[0081] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound to form the wound structure.

[0082] In some embodiments, the electrode assembly is a stacked structure.

[0083] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0084] In some embodiments, the housing includes an end cap and a shell body, the shell body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly and the electrolyte, etc. The shell body can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0085] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab, or indirectly connected to the tab through an adapter. The electrode terminal can be provided on the end cap or on the shell body.

[0086] In some embodiments, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cell.

[0087] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, the housing can protect the electrode assembly and prevent electrolyte leakage, etc. When the housing is a non-sealed structure, the housing can protect the electrode assembly, and a sealing bag can be further included between the housing and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte, etc. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film.

[0088] As an example, the battery cell can be a prismatic battery cell or a battery cell of other shapes, including a square cell, a blade cell, a multi-prismatic battery cell, such as a hexagonal battery cell, etc.

[0089] At present, from the development of market situation, the battery device has been widely used in electric bicycles, electric motorcycles, electric vehicles, etc. electric vehicles, as well as electric tools, unmanned aerial vehicles, energy storage equipment, etc. multiple fields. With the continuous expansion of the field of battery use, the demand for its market is also increasing.

[0090] The development of battery technology needs to consider many design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, etc. In addition, with the change of environmental conditions and / or internal conditions of the battery, the energy density of the battery device is also one of the key factors to be considered.

[0091] The battery device includes a first circuit board connected to the battery cell for collecting information of the battery cell (charging and discharging current, charging and discharging voltage, temperature, etc.) and generating an electrical signal, and a second circuit board receiving the electrical signal generated by the first circuit board. When the electrical signal received by the second circuit board shows that the state of the battery cell is abnormal (such as abnormal charging and discharging current, abnormal charging and discharging voltage, abnormal temperature, etc.), the second circuit board controls the battery cell to be powered off.

[0092] However, due to the distance between the second circuit board and the first circuit board, the second circuit board is usually connected by a first wire harness, the first circuit board is connected by a second wire harness, and the first wire harness and the second wire harness are connected by a connector, so as to realize the connection between the second circuit board and the first circuit board, which results in a large weight of the battery device and affects the energy density of the battery device.

[0093] Based on the above considerations, in order to solve the problem that the first wire harness and the second wire 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 box body, a battery cell and a high-voltage box assembly. The battery cell is arranged in the box body. 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, 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 for collecting information of the battery cell and generating an electrical signal, and the other is used for receiving the electrical signal, one end of the connector is welded to the first circuit board, and the other end of the connector is inserted into the second circuit board.

[0094] By connecting the second circuit board and the first circuit board to the mounting member, the distance between the second circuit board and the first circuit board is short, and one end of the connector is welded to the first circuit board and the other end of the connector is inserted into the second circuit board. Compared with connecting the connector and the second circuit board by a wire harness or connecting the connector and the first circuit board by a wire harness, the use of the wire harness is reduced, the cost is saved, the weight of the high-voltage box assembly is reduced, the weight of the battery device is reduced, and the energy density of the battery device is improved.

[0095] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells and battery devices. The electric device can include a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.

[0096] The following embodiments are described with a vehicle as an example of an electric device of an embodiment of the present application for convenience of description.

[0097] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle is provided for some embodiments of the present application. The vehicle 100 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle, etc. The vehicle 100 is internally provided with a battery device 1, which can be arranged at the bottom, head or tail of the vehicle 100. The battery device 1 can be used for power supply of the vehicle 100, for example, the battery device 1 can be used as an operating power source of the vehicle 100, for example, for the circuit system of the vehicle 100, such as for the working power demand of the vehicle 100 during starting, navigation and running.

[0098] The vehicle 100 can further include a controller 110 and a motor 120, and the controller 110 is used to control the battery device 1 to supply power to the motor 120, for example, for the working power demand of the vehicle 100 during starting, navigation and running.

[0099] In some embodiments of the present application, the battery device 1 can not only be used as an operating power source of the vehicle 100, but also be used as a driving power source of the vehicle 100, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 100.

[0100] The battery device includes a battery monomer assembly and a power management system, and the battery management system is connected with the battery monomer assembly and is used to manage the charging and discharging of the battery monomer assembly.

[0101] Please refer to Figure 2 , Figure 2 A structural exploded view of the battery device is provided for some embodiments of the present application. The battery device 1 can include a box body 10 and a battery monomer 20, and the battery monomer 20 is contained in the box body 10.

[0102] The box body 10 is used to provide a containing space for the battery monomer 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first sub-box body 11 and a second sub-box body 12, and the first sub-box body 11 and the second sub-box body 12 are mutually covered, and the first sub-box body 11 and the second sub-box body 12 jointly define a containing space for containing the battery monomer 20. The first sub-box body 11 can be a hollow structure with one end open, and the second sub-box body 12 can be a plate-shaped structure, and the second sub-box body 12 covers the open side of the first sub-box body 11 to jointly define the containing space with the first sub-box body 11; the first sub-box body 11 and the second sub-box body 12 can also be hollow structures with one side open, and the open side of the first sub-box body 11 covers the open side of the second sub-box body 12.

[0103] In the battery device 1, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and the whole of the multiple battery cells 20 is accommodated in the case 10. Of course, the battery device 1 can also be that the multiple battery cells 20 are connected in series, in parallel, or in a mixed manner to form a battery module, and the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole, and the whole is accommodated in the case 10. The battery device 1 can also include other structures. For example, the battery device 1 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0104] Please refer to Figure 3 , Figure 3 The structural exploded view of the battery cell provided in some embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the battery cell 20 includes a battery cell housing 21, an electrode assembly 24, and an electrode terminal 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. Figure 3

[0105] The shell 22 is a component for cooperating with the end cap 23 to form the internal environment of the battery cell 20. The formed internal environment can be used to accommodate the electrode assembly 24, electrolyte, and other components. The shell 22 and the end cap 23 can be independent components. The shell 22 can be of various shapes and sizes. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 24. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0106] The end cap 23 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 23 can be adapted to the shape of the shell 22 to cooperate with the shell 22. Optionally, the end cap 23 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cap 23 is not easy to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the reliability can also be improved. The end cap 23 can be provided with functional components such as electrode terminals. The electrode terminal can be used to electrically connect with the electrode assembly 24 for outputting or inputting the electrical energy of the battery cell 20. The material of the end cap 23 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not specially limited in the embodiments of the present application. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 23. The insulating structure can be used to isolate the electrical connection components in the shell 22 from the end cap 23 to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.​

[0107] Please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a schematic diagram of the high-voltage box assembly provided in some embodiments of this application. Figure 5 This is a schematic diagram illustrating the connection between a second circuit board and a first circuit board provided in some embodiments of this application. Figure 6 for Figure 5 An exploded view of the structure. This application provides a battery device 1, which includes a housing 10, individual battery cells 20, and a high-voltage box assembly 30. The individual battery cells 20 are disposed within 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. Both the second circuit board 32 and the first circuit board 33 are connected to the mounting member 31, which is connected to the housing 10. One of the first circuit board 33 and the second circuit board 32 is connected to the individual battery cells 20 to collect information from the individual battery cells 20 and generate electrical signals, while the other is used to receive electrical signals. One end of the connector 40 is soldered to the first circuit board 33, and the other end is inserted into the second circuit board 32.

[0108] In some embodiments, the high-voltage box assembly 30 may 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, the first circuit board 33 may be connected to the battery cell 20, and the first circuit board 33 acquires information from the battery cell 20 and generates electrical signals. The first circuit board 33 may serve as at least part of a battery monitoring circuit (CSC).

[0109] Correspondingly, the second circuit board 32 receives the electrical signals generated by the first circuit board 33, and the second circuit board 32 can serve as at least part of the battery management unit (BMU).

[0110] In some embodiments, the second circuit board 32 may be connected to the battery cell 20, and the second circuit board 32 acquires information from the battery cell 20 and generates electrical signals. The second circuit board 32 may be at least part of a Cell Supervising Circuit (CSC).

[0111] Correspondingly, the first circuit board 33 receives the electrical signal generated by the second circuit board 32, and the first circuit board 33 can serve as at least part of the battery management unit (BMU).

[0112] In some embodiments, one of the first circuit board 33 and the second circuit board 32 can be a printed circuit board. For example, the first circuit board 33 can be a printed circuit board, or the second circuit board 32 can be a printed circuit board, or both the first circuit board 33 and the second circuit board 32 can be printed circuit boards.

[0113] In other embodiments, at least one of the first circuit board 33 and the second circuit board 32 can be a flexible circuit board.

[0114] In some embodiments, the mount 31 can be disposed in the case 10. The case 10 can include a top wall and a bottom wall disposed opposite to each other, and the bottom wall can carry the battery cell 20. The case 10 can further include a side wall, one end of the side wall can be disposed around an outer periphery of the bottom wall, and the other end of the side wall can be disposed around an outer periphery of the top wall. The mount 31 can be disposed on the bottom wall, or the mount 31 can be disposed on the side wall, or the mount 31 can be disposed on the top wall.

[0115] In some embodiments, the mount 31 can be connected to the wall of the case 10 by means of bolting.

[0116] In some embodiments, the mount 31 can have a cavity, and the first circuit board 33, the second circuit board 32, and the connector 40 can be disposed in the cavity. The first circuit board 33 and the second circuit board 32 can be disposed on two walls adjacent to each other of the mount 31, or the first circuit board 33 and the second circuit board 32 can be disposed on two walls disposed opposite to each other of the mount 31.

[0117] In some embodiments, the first circuit board 33 and the second circuit board 32 can be connected to the wall of the mount 31 by means of bolting.

[0118] In some embodiments, the thickness direction of the first circuit board 33 can be parallel to the thickness direction of the second circuit board 32.

[0119] In some embodiments, the thickness direction of the first circuit board 33 can be intersected with the thickness direction of the second circuit board 32.

[0120] In some embodiments, the thickness direction of the first circuit board 33 can be perpendicular to the thickness direction of the second circuit board 32.

[0121] In some embodiments, one end of the connector 40 is welded to the first circuit board 33, and the other end of the connector 40 is inserted into the second circuit board 32. The second circuit board 32 can be provided with a mounting hole, and the other end of the connector 40 can be inserted into the mounting hole and be in interference fit with the mounting hole to realize the connection between the second circuit board 32 and the connector 40. Alternatively, the second circuit board 32 can be provided with a protrusion, and the other end of the connector 40 can be provided with a groove portion, and the protrusion and the groove portion are in interference fit to realize the connection between the second circuit board 32 and the connector 40.

[0122] 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.

[0123] The technical scheme of the embodiments of the present application realizes the close distance between the second circuit board 32 and the first circuit board 33 by connecting the second circuit board 32 and the first circuit board 33 to the mounting member 31, and one end of the connector 40 is welded to the first circuit board 33 and the other end is inserted into the second circuit board 32, which reduces the use of wire harnesses compared to connecting the connector 40 and the second circuit board 32 by wire harnesses or connecting the connector 40 and the first circuit board 33 by wire harnesses, saves costs, and is conducive to reducing the weight of the high-voltage box assembly 30, thereby being conducive to reducing the weight of the battery device 1 and improving the energy density of the battery device 1. At the same time, the insertion of the connector 40 into the second circuit board 32 facilitates the connection and disassembly of the connector 40 and the second circuit board 32, and reduces the difficulty of installation and maintenance.

[0124] Please refer to Figure 4 to Figure 6 , and refer to Figure 7 and Figure 8 , Figure 7 the structural schematic diagram of the connecting member provided by some embodiments of the present application, Figure 8 the structural schematic diagram of the connection between the connector and the second circuit board and the connecting column provided by some embodiments of the present application. In some embodiments, the connector 40 includes a connecting member 41, the connecting member 41 includes a first connecting segment 411, and the first connecting segment 411 is formed with a connecting groove 4111. The high-voltage box assembly 30 further includes a connecting column 322, one end of the connecting column 322 is connected to the second circuit board 32, and the other end of the connecting column 322 is clamped into the connecting groove 4111.

[0125] In some embodiments, the material of the connecting member 41 can be a conductive metal, thereby realizing the electrical connection between the first circuit board 33 and the second circuit board 32.

[0126] In some embodiments, the material of the connecting column 322 can be a conductive metal, thereby realizing the electrical connection between the first circuit board 33 and the second circuit board 32.

[0127] In some embodiments, the surface of the connecting piece 41 can be provided with a metal plating layer.

[0128] In some embodiments, the surface of the connecting column 322 can be provided with a metal plating layer.

[0129] In some embodiments, the material of the connecting column 322 can be the same as or different from that of the connecting piece 41.

[0130] In some embodiments, the connecting column 322 can be connected to the second circuit board 32 by screwing, welding or integrally formed with the second circuit board 32.

[0131] 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 connecting column 322 and the inner wall of the connecting groove 4111 can be deformed and have a reset tendency, so that the connecting column 322 and the connecting groove 4111 are in interference fit.

[0132] In some embodiments, the extending direction of the connecting column 322 can be perpendicular to the thickness direction of the second circuit board 32, and the connecting column 322 can be connected to one side of the second circuit board 32.

[0133] In some embodiments, the extending direction of the connecting column 322 can intersect the thickness direction of the second circuit board 32, and the connecting column 322 can be connected to the surface in the thickness direction of the second circuit board 32.

[0134] In some embodiments, the extending direction of the connecting column 322 can be parallel to the thickness direction of the second circuit board 32.

[0135] In some embodiments, the first connecting section 411 is formed with the connecting groove 4111, and the first connecting section 411 can be formed with the connecting groove 4111 by machining or integrally formed.

[0136] In some embodiments, the first connecting section 411 is formed with the connecting groove 4111, and the first connecting section 411 can include two oppositely arranged components, and the gap between the two oppositely arranged components forms the connecting groove 4111.

[0137] The technical scheme of the embodiments of the present application connects one end of the connecting column 322 to the second circuit board 32 and the other end to the connecting groove 4111 of the connecting piece 41, which is conducive to improving the convenience of connecting the connector 40 to the second circuit board 32.

[0138] Please refer to Figure 6 In some embodiments, the connecting column 322 and the second circuit board 32 can be integrally formed. For example, the circuit board can be generated first, and the connecting column 322 and the second circuit board 32 can be formed by trimming the circuit board.

[0139] In some embodiments, the second circuit board 32 and the connecting post 322 are integrally formed, and the second circuit board 32 and the connecting post 322 can be simultaneously conveyed, thereby improving the conveying efficiency.

[0140] The technical scheme of the embodiments of the present application integrally forms the connecting post 322 and the second circuit board 32, thereby improving the connection reliability between the connecting post 322 and the second circuit board 32.

[0141] In some embodiments, the connecting piece 41 includes two sub-connecting pieces 412, and the two sub-connecting pieces 412 are oppositely arranged. Each sub-connecting piece 412 includes a body part 4121 and a protruding part 4122, the protruding part 4122 is connected to one end of the body part 4121 facing the second circuit board 32, the protruding part 4122 of one sub-connecting piece 412 is protruded on the body part 4121 in a direction close to the other sub-connecting piece 412, and a gap between the two protruding parts 4122 forms a connecting groove 4111.

[0142] In some embodiments, the connecting piece 41 includes two sub-connecting pieces 412, and the positions of the two sub-connecting pieces 412 are fixed in opposition. The fixed manner can be fixed by other components in the connector 40, such as the shell 43 of the connector 40.

[0143] In some embodiments, the sub-connecting piece 412 includes the body part 4121 and the protruding part 4122, and the body part 4121 and the protruding part 4122 can be integrally formed or welded.

[0144] In some embodiments, one end of the sub-connecting piece 412 can be welded with the first circuit board 33, and the other end can be bent to form the protruding part 4122, and the part of the sub-connecting piece 412 that is not bent is the body part 4121.

[0145] In some embodiments, the protruding part 4122 can be an arc-shaped bent section, and a gap between the two protruding parts 4122 forms the connecting groove 4111. When the connecting post 322 is clamped in the connecting groove 4111, the two surfaces of the two protruding parts 4122 opposite to the connecting post 322 abut.

[0146] In some embodiments, the two sub-connecting pieces 412 can be oppositely arranged along the thickness direction of the connecting post 322.

[0147] The technical scheme of the embodiments of the present application forms the connecting groove 4111 through the gap between the two protruding parts 4122, and when the connecting post 322 is clamped in the connecting groove 4111, the protruding part 4122 deforms, so that the two protruding parts 4122 are in interference fit with the connecting post 322, thereby improving the connection reliability of the connecting post 322 and the connecting groove 4111.

[0148] Please refer to Figure 6 to Figure 8 In some embodiments, in the first direction X, two ends of the connecting column 322 are connected to the second circuit board 32 and the sub connecting piece 412 respectively. In the first direction X, the distance between the end surface of the connecting column 322 away from the second circuit board 32 and the convex part 4122 is L, which satisfies: 1mm≤L≤4mm.

[0149] In some embodiments, the first direction can be represented by the direction indicated by the letter X in the figure.

[0150] In some embodiments, the first direction X can be parallel to the length direction of the connecting column 322, the thickness direction of the connecting column 322 can be parallel to the thickness direction of the second circuit board 32, and the sub connecting piece 412 can extend along the first direction X.

[0151] In some embodiments, the first direction X can be parallel to the length direction of the connecting column 322, the thickness direction of the second circuit board 32 can be parallel to the first direction X, and the sub connecting piece 412 can extend along the first direction X.

[0152] In some embodiments, the convex part 4122 can be an arc segment, and the two convex parts 4122 can be symmetrically arranged along the central axis of the connecting column 322 in the first direction X. One convex part 4122 has a contact point closest to the other convex part 4122, and the two contact points are respectively in abutment with the two opposite surfaces of the connecting column 322. In the first direction X, the distance between the end surface of the connecting column 322 away from the second circuit board 32 and the contact point is L.

[0153] In some embodiments, in the first direction X, the distance between the end surface of the connecting column 322 away from the second circuit board 32 and the convex part 4122 is L, which satisfies the above condition, and L can be any value or a value between any two values in 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm.

[0154] In some embodiments, L=2mm.

[0155] In some embodiments, the material of the sub connecting piece 412 can be alloy copper, such as copper-nickel-silicon, phosphor bronze, etc.

[0156] The technical scheme of the embodiments of the present application sets the distance L between the end surface of the connecting column 322 away from the second circuit board 32 and the convex part 4122 to satisfy the above condition, when L≥1mm, which can reduce the risk of the connecting column 322 shaking along the first direction X and thus disengaging from the connecting groove 4111, thereby facilitating to improve the reliability of the connection between the connecting column 322 and the connecting groove 4111. When L≤4mm, the size of the connecting column 322 and the connecting groove 4111 in the first direction X is small, which is conducive to saving the space of the mounting piece 31.

[0157] Please refer to Figure 4 and Figure 5 , and refer to Figure 9 and Figure 10 , Figure 9 Partial structural schematic diagram of a connecting piece provided for some embodiments of the present application, Figure 10 Structural schematic diagram of a second circuit board provided for some embodiments of the present application. In some embodiments, the connector 40 comprises a connecting piece 41, the connecting piece 41 comprises a first connecting segment 411, and the second circuit board 32 is provided with a first connecting hole 321, and the first connecting segment 411 is clamped in the first connecting hole 321.

[0158] In some embodiments, the material of the first connecting segment 411 can be a conductive metal, so as to realize the electrical connection between the first circuit board 33 and the second circuit board 32.

[0159] In some embodiments, the material of the inner wall surface of the first connecting hole 321 can be a conductive metal, so as to realize the electrical connection between the first circuit board 33 and the second circuit board 32.

[0160] In some embodiments, the surface of the first connecting segment 411 can be provided with a metal plating layer.

[0161] In some embodiments, the inner wall surface of the first connecting hole 321 can be provided with a metal plating layer.

[0162] In some embodiments, the material of the first connecting segment 411 can be the same as or different from the material of the inner wall surface of the first connecting hole 321.

[0163] In some embodiments, the first connecting segment 411 is clamped in the first connecting hole 321, one of the outer surface of the first connecting segment 411 and the inner wall surface of the first connecting hole 321 can be deformed, and there is a resetting trend, so that the first connecting segment 411 is in interference fit with the first connecting hole 321.

[0164] In some embodiments, the first connecting hole 321 can penetrate through both end surfaces of the second circuit board 32 in the thickness direction.

[0165] In some embodiments, the first connecting hole 321 can be arranged at the end surface of the second circuit board 32 facing the first connecting segment 411 in the thickness direction.

[0166] In some embodiments, the first connecting hole 321 can be formed in the second circuit board 32 by machining or integral molding.

[0167] The technical scheme of the embodiments of the present application, by clamping the first connecting segment 411 in the first connecting hole 321, is conducive to improving the convenience of the connector 40 in connecting the second circuit board 32.

[0168] Please refer to Figure 4 , Figure 5 , Figure 9 and Figure 10 In some embodiments, the first connecting section 411 includes a first sub-connecting section 4112 and a second sub-connecting section 4113, and the end of the first sub-connecting section 4112 facing the first circuit board 33 is connected to the end of the second sub-connecting section 4113 facing the first circuit board 33 in the first direction X. In the second direction Y, part of the first sub-connecting section 4112 and part of the second sub-connecting section 4113 are arranged at intervals to form a cavity 4114. When the first connecting section 411 is clamped in the first connecting hole 321, the first sub-connecting section 4112 and the second sub-connecting section 4113 are close to each other to compress the cavity 4114, and the first direction X is perpendicular to the second direction Y.

[0169] In some embodiments, the second direction can be represented by the direction indicated by the letter Y in the figure.

[0170] In some embodiments, the first direction X can be parallel to the thickness direction of the second circuit board 32, and the second direction Y can be parallel to the width direction of the second circuit board 32 or the length direction of the second circuit board 32.

[0171] In some embodiments, the first sub-connecting section 4112 and the second sub-connecting section 4113 can have the same structure and material.

[0172] In some embodiments, the first sub-connecting section 4112 and the second sub-connecting section 4113 can be arranged symmetrically relative to the axis of the first connecting section in the first direction X.

[0173] In some embodiments, one end of the first sub-connection segment 4112 facing the first circuit board 33 is connected with one end of the second sub-connection segment 4113 facing the first circuit board 33, and the other end of the first sub-connection segment 4112 away from the first circuit board 33 is connected with the other end of the second sub-connection segment 4113 away from the first circuit board 33, that is, the first connection segment 411 can be a fisheye structure. The first sub-connection segment 4112 and the second sub-connection segment 4113 are oppositely arranged arc-shaped segments. In the first direction X, one end of the first sub-connection segment 4112 is connected with one end of the second sub-connection segment 4113 in the same direction, the other end of the first sub-connection segment 4112 is connected with the other end of the second sub-connection segment 4113 in the same direction, and a part of the first sub-connection segment 4112 and a part of the second sub-connection segment 4113 are arranged in the second direction Y. The gap between the first sub-connection segment 4112 and the second sub-connection segment 4113 in the second direction Y forms a cavity 4114. The first sub-connection segment 4112 has a contact point farthest from the second sub-connection segment 4113, and the second sub-connection segment 4113 has a contact point farthest from the first sub-connection segment 4112. The two contact points respectively abut against two inner wall surfaces of the first connecting hole 321 opposite in the second direction Y. When the first connection segment 411 is clamped in the first connecting hole 321, the first connecting hole 321 extrudes the two contact points, so that the first sub-connection segment 4112 and the second sub-connection segment 4113 elastically deform in the second direction Y, so as to make the first sub-connection segment 4112 and the second connection segment 413 close to each other, thereby making the cavity 4114 be compressed. The first sub-connection segment 4112 and the second connection segment 413 both have a restoring tendency, so that the first sub-connection segment 4112 and the second sub-connection segment 4113 have a tendency to move away from each other, thereby making the first connection segment 411 and the first connecting hole 321 have an interference fit.

[0174] In some embodiments, along the first direction X, different parts of the first sub-connection segment 4112 have the same size in the second direction Y.

[0175] In some embodiments, along the first direction X, different parts of the second sub-connection segment 4113 have the same size in the second direction Y.

[0176] In some embodiments, the material of the first connection segment 411 can be alloy copper, such as copper-nickel-silicon, phosphor bronze, etc.

[0177] In some embodiments, one end of the first sub-connection segment 4112 facing the first circuit board 33 is connected with one end of the second sub-connection segment 4113 facing the first circuit board 33, and the other part of the first sub-connection segment 4112 and the second sub-connection segment 4113 can be spaced apart along the second direction Y. When the first connection segment 411 is clamped in the first connection hole 321, the parts of the first sub-connection segment 4112 and the second sub-connection segment 4113 spaced apart from each other are inserted into the first connection hole 321, so that the parts of the first sub-connection segment 4112 and the second sub-connection segment 4113 spaced apart from each other are close to each other, so that the parts of the first sub-connection segment 4112 and the second sub-connection segment 4113 spaced apart from each other have a tendency to move away from each other, thereby making the first connection segment 411 and the first connection hole 321 have an interference fit.

[0178] The technical scheme of the embodiments of the present application, when the first connection segment 411 is clamped in the first connection hole 321, the first sub-connection segment 4112 and the second sub-connection segment 4113 are close to each other, so that the cavity 4114 is compressed, so that the first sub-connection segment 4112 and the second sub-connection segment 4113 have a tendency to move away from each other, thereby having an interference fit with the first connection hole 321, which is beneficial to improve the reliability of the first connection segment 411 clamped in the first connection hole 321.

[0179] 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 sub-connection segment 4112 away from the first circuit board 33 is connected with one end of the second sub-connection segment 4113 away from the first circuit board 33.

[0180] The technical scheme of the embodiments of the present application, by connecting one end of the first sub-connection segment 4112 with one end of the second sub-connection segment 4113, and connecting the other end of the first sub-connection segment 4112 with the other end of the second sub-connection segment 4113, thereby forming a cavity 4114 closed at both ends in the first direction X, which is beneficial to improve the structural strength of the first connection segment 411, thereby improving the reliability of the first connection segment 411 clamped in the first connection hole 321.

[0181] Please refer to Figure 4 , Figure 5 , Figure 9 and Figure 10 In some embodiments, the connector 40 further comprises an elastic member 42, and the elastic member 42 is arranged in the cavity 4114, and the two ends of the elastic member 42 abut against the first sub-connection segment 4112 and the second sub-connection segment 4113 respectively in the second direction Y.

[0182] In some embodiments, the elastic member 42 can be a spring, a torsion spring, a plastic ring, etc.

[0183] In some embodiments, when the first connecting segment 411 is clamped in the first connecting hole 321, the first connecting hole 321 presses two contact points, so that the first sub connecting segment 4112 and the second sub connecting segment 4113 are elastically deformed along the second direction Y to make the first sub connecting segment 4112 and the second connecting segment 413 close to each other, so that the cavity 4114 is compressed, and the elastic member 42 is compressed along the second direction Y. At this time, the elastic member 42 has an elastic force for resetting along the second direction Y, so that the first sub connecting segment 4112 and the second connecting segment 413 both have a resetting trend, so that the first sub connecting segment 4112 and the second sub connecting segment 4113 have a trend of moving away from each other, so that the first connecting segment 411 is in interference fit with the first connecting hole 321.

[0184] In some embodiments, the material of the elastic member 42 can be carbon spring steel, cobalt-chromium-nickel alloy, natural rubber, etc.

[0185] In some embodiments, the number of elastic members 42 can be one, and the two ends of the elastic member 42 correspond to the two contact points in the second direction Y, respectively.

[0186] In some embodiments, the number of elastic members 42 can be multiple, and the multiple elastic members 42 are arranged at intervals along the first direction X.

[0187] The technical scheme of the embodiments of the present application, when the first connecting segment 411 is clamped in the first connecting hole 321, the elastic member 42 is compressed, so that the elastic member 42 has a resetting trend, so that the first connecting segment 411 is in interference fit with the first connecting hole 321, which is beneficial to improve the reliability of the first connecting segment 411 clamped in the first connecting hole 321.

[0188] Please refer to Figure 4 to Figure 7 , and refer to Figure 11 , Figure 11 The first circuit board provided by some embodiments of the present application is shown in the schematic diagram. In some embodiments, the connector 40 includes a connecting piece 41, and the connecting piece 41 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, the second connecting segment 413 is arranged in the second connecting hole 331, and the second connecting segment 413 is welded to the first circuit board 33.

[0189] In some embodiments, the material of the second connecting segment 413 can be a conductive metal, so as to realize the electrical connection between the first circuit board 33 and the second circuit board 32.

[0190] In some embodiments, the inner wall surface of the second connecting hole 331 can be made of a conductive metal, so as to realize the electrical connection between the first circuit board 33 and the second circuit board 32.

[0191] In some embodiments, the surface of the second connecting segment 413 can be provided with a metal plating layer.

[0192] In some embodiments, the inner wall surface of the second connecting hole 331 can be provided with a metal plating layer.

[0193] In some embodiments, the material of the second connecting section 413 can be the same as or different from that of the inner wall surface of the second connecting hole 331.

[0194] In some embodiments, the second connecting hole 331 can pass through both end surfaces of the first circuit board 33 in the thickness direction.

[0195] In some embodiments, the second connecting hole 331 can be arranged at the end surface of the first circuit board 33 facing the second connecting section 413 in the thickness direction.

[0196] In some embodiments, the second connecting hole 331 can be formed in the first circuit board 33 by machining or integral molding.

[0197] In some embodiments, the extension direction of the second connecting section 413 can be parallel to the thickness direction of the first circuit board 33.

[0198] In some embodiments, the second connecting section 413 can extend along the first direction X or the second direction Y.

[0199] 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 be matched, and the second connecting section 413 can be connected to the first circuit board 33 by welding after being arranged in the second connecting hole 331.

[0200] In some embodiments, the welding method can be wave-soldering, reflow soldering, selective soldering, etc.

[0201] In some embodiments, the high-voltage box assembly 30 can further include an insulating member 34 arranged on the surface of the first circuit board 33 away from the second circuit board 32. After the second connecting section 413 is arranged in the second connecting hole 331, the end of the second connecting section 413 passing through the second connecting hole 331 abuts against the insulating member 34, thereby reducing the risk of short circuit of the second connecting section 413 passing through the second connecting hole 331 with other components.

[0202] In some embodiments, the material of the insulating member 34 can be plastic, rubber, etc.

[0203] In some embodiments, the insulating member 34 can be connected to the first circuit board 33 by adhesion or integral molding.

[0204] In some embodiments, the connecting piece 41 can include two sub-connecting pieces 412 oppositely arranged. Correspondingly, the first circuit board 33 can be provided with two second connecting holes 331 arranged at intervals, the second connecting segment 413 of one sub-connecting piece 412 is arranged through one second connecting hole 331, and the second connecting segment 413 of the other sub-connecting piece 412 is arranged through the other second connecting hole 331.

[0205] It should be noted that in the production process, the first circuit board 33 can be welded with the second connecting segment 413, and then the first connecting segment 411 is inserted into the second circuit board 32.

[0206] The technical scheme of the embodiments of the present application can improve the reliability of the second connecting segment 413 connecting the first circuit board 33 by welding the second connecting segment 413 to the first circuit board 33.

[0207] Please refer to Figure 4 to Figure 7 , and refer to Figure 12 , Figure 12 The schematic diagram of the shell provided by some embodiments of the present application is shown. In some embodiments, the number of connecting pieces 41 is multiple, and the multiple connecting pieces 41 are arranged at intervals. The connector 40 further includes a shell 43 made of insulating material, and the shell 43 is provided with multiple first through holes 431 arranged at intervals, and one connecting piece 41 is arranged through one first through hole 431.

[0208] In some embodiments, the number of connecting pieces 41 is multiple, the connecting piece 41 can extend along the thickness direction of the first circuit board 33, the connecting piece 41 can include two sub-connecting pieces 412 oppositely arranged along the width direction of the first circuit board 33, and the multiple connecting pieces 41 can be arranged at intervals along the length direction of the first circuit board 33. The multiple connecting pieces 41 can improve the efficiency of the connector 40 in transmitting electrical signals.

[0209] In some embodiments, the material of the shell 43 is set to be insulating material, which can reduce the risk of short circuit between the connecting pieces 41.

[0210] In some embodiments, the material of the shell 43 can be ceramic-based material, polymer-based composite material, glass fiber, etc.

[0211] In some embodiments, the connecting piece 41 can include two sub-connecting pieces 412 oppositely arranged. Correspondingly, the shell 43 can be provided with two first through holes 431 arranged at intervals, one sub-connecting piece 412 is arranged through one first through hole 431, and the other sub-connecting piece 412 is arranged through the other first through hole 431.

[0212] In some embodiments, the side of the shell 43 facing the second circuit board 32 can be provided with a second through hole 432, one end of the connecting column 322 is connected to the second circuit board 32, and the other end of the connecting column 322 is clamped in the connecting groove 4111, and the other end of the connecting column 322 is inserted into the second through hole 432.

[0213] The technical scheme of the embodiment of the application reduces the risk of interference of the plurality of connecting pieces 41 by installing the plurality of connecting pieces 41 one by one in the plurality of first through holes 431 of the shell 43, and is beneficial to improving the reliability of the installation of the connecting pieces 41.

[0214] Please refer to Figure 4 to Figure 7 , Figure 12 In some embodiments, the connector 40 further comprises a plurality of blocking pieces 44, the blocking pieces 44 are connected to the shell 43, and the blocking pieces 44 are located between any two adjacent connecting pieces 41. The material of the blocking piece 44 is an insulating material.

[0215] In some embodiments, the blocking piece 44 can be located between any two adjacent second connecting sections 413.

[0216] In some embodiments, the blocking piece 44 can be located between any two adjacent first connecting sections 411.

[0217] In some embodiments, a part of the blocking piece 44 can be located between any two adjacent second connecting sections 413, and another part of the blocking piece 44 can be located between any two adjacent first connecting sections 411.

[0218] In some embodiments, the two parts of the blocking piece 44 can be two parts connected to each other.

[0219] In some embodiments, the two parts of the blocking piece 44 can be two independent parts.

[0220] In some embodiments, the material of the blocking piece 44 can be a ceramic-based material, a polymer-based composite material, glass fiber, etc.

[0221] In some embodiments, the blocking piece 44 can be integrally formed with the shell 43.

[0222] In some embodiments, the blocking piece 44 can be adhesively connected, bolted, etc. with the shell 43.

[0223] The technical scheme of the embodiment of the application is beneficial to reducing the risk of electrical effect of the two adjacent connecting pieces 41 by arranging the blocking piece 44 between the two adjacent connecting pieces 41.

[0224] Please refer to Figure 4 to Figure 7 , Figure 11 and Figure 12In some embodiments, the first circuit board 33 is provided with a third connecting hole 332, and one end of the partition piece 44 is connected to the housing 43 and the other end is inserted into the third connecting hole 332.

[0225] In some embodiments, the third connecting hole 332 can pass through both end faces of the first circuit board 33 in the thickness direction.

[0226] In some embodiments, the third connecting hole 332 can be arranged on the end face of the first circuit board 33 in the thickness direction facing the second connecting section 413.

[0227] In some embodiments, the second connecting hole 331 can be formed on the first circuit board 33 by machining or integral molding.

[0228] In some embodiments, the inner diameter of the third connecting hole 332 can be the same as the outer diameter of the partition piece 44, so that the third connecting hole 332 and the partition piece 44 can be matched.

[0229] In some embodiments, the extension direction of the partition piece 44 can be parallel to the thickness direction of the first circuit board 33.

[0230] In some embodiments, one part of the partition piece 44 can be located between any two adjacent second connecting sections 413, and the other part of the partition piece 44 can be located between any two adjacent first connecting sections 411. The two parts of the partition piece 44 can be two independent parts. One end of the first part of the partition piece 44 is inserted into the third connecting hole 332, and the other end of the first part of the partition piece 44 is connected to the housing 43.

[0231] In some embodiments, the second circuit board 32 is provided with a fifth connecting hole 323. One end of the second part of the partition piece 44 is inserted into the fifth connecting hole 323, and the other end of the second part of the partition piece 44 is connected to the housing 43.

[0232] In some embodiments, the third connecting hole 332 can pass through both end faces of the second circuit board 32 in the thickness direction.

[0233] In some embodiments, the fifth connecting hole 323 can be arranged on the end face of the second circuit board 32 in the thickness direction facing the first connecting section 411.

[0234] In some embodiments, the fifth connecting hole 323 can be formed on the second circuit board 32 by machining or integral molding.

[0235] In some embodiments, the inner diameter of the fifth connecting hole 323 can be the same as the outer diameter of the partition piece 44, so that the fifth connecting hole 323 and the partition piece 44 can be matched.

[0236] The technical scheme of the embodiment of the application has the advantage that the spacer 44 is inserted into the third connecting hole 332, thereby improving the reliability of the connector 40 in connecting the first circuit board 33.

[0237] 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.

[0238] The technical scheme of the embodiment of the application has the advantage that the ceramic-based material, the polymer-based composite material, and the glass fiber have good high-temperature resistance, the material of the shell 43 is set to at least one of a ceramic-based material, a polymer-based composite material, and glass fiber, the risk of damage to the shell 43 caused by welding of the connector 40 and the first circuit board 33 is reduced, and the reliability of the battery device 1 is improved.

[0239] Please refer to Figure 4 to Figure 7 , Figure 11 and Figure 12 In some embodiments, the first circuit board 33 is provided with a fourth connecting hole 333, and the connector 40 further includes a fixing member 45, one end of the fixing member 45 being connected to the shell 43 and the other end being inserted into the fourth connecting hole 333.

[0240] In some embodiments, the fourth connecting hole 333 can pass through both end surfaces of the first circuit board 33 in the thickness direction.

[0241] In some embodiments, the fourth connecting hole 333 can be arranged on the end surface of the first circuit board 33 facing the second connecting section 413 in the thickness direction.

[0242] In some embodiments, the fourth connecting hole 333 can be formed on the first circuit board 33 by machining or one-piece molding.

[0243] In some embodiments, the end of the fixing member 45 facing the first circuit board 33 can be provided with a protrusion, and the protrusion is inserted into the fourth connecting hole 333.

[0244] In some embodiments, the number of protrusions of one fixing member 45 can be two, the number of fourth connecting holes 333 can correspond to the number of protrusions, and one protrusion is inserted into one fourth connecting hole 333.

[0245] In some embodiments, the number of fixing members 45 can be two, and the two fixing members 45 are arranged on both sides of the shell 43.

[0246] In some embodiments, the shell 43 can be provided with a third through hole 433, and the third through hole 433 can be formed on the shell 43 by machining or one-piece molding. The end of the fixing member 45 away from the first circuit board 33 is inserted into the third through hole 433 and is clamped with the third through hole 433.

[0247] In some embodiments, the fixing member 45 can be provided with a first flange at an end thereof away from the first circuit board 33. 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 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 connecting hole 333, and the first flange is in abutment with the end surface of the housing 43 away from the first circuit board 33.

[0248] In some embodiments, the fixing member 45 can 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 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 connecting hole 333. At this time, the second flange is located in the third through hole 433, so that the second flange is elastically deformed and is in abutment with the inner wall of the third through hole 433, and the second flange has a restoring elastic force, so that the second flange is in interference fit with the third through hole 433.

[0249] In some embodiments, the inner wall of the third through hole 433 can be provided with a groove corresponding to the second flange. When the second flange enters the third through hole 433, the second flange is located in the position corresponding to the groove, and the groove provides a restoring space for the second flange, so that the second flange enters the groove after being restored, thereby realizing the clamping of the second flange in the groove.

[0250] The technical scheme of the embodiments of the present application connects the housing 43 and the first circuit board 33 through the fixing member 45, which is conducive to improving the reliability of the connector 40 in connecting the first circuit board 33.

[0251] In some embodiments, the hardness of the fixing member 45 is greater than the hardness of the connecting member 41.

[0252] Since the connecting member 41 needs to be elastically deformed when being connected to the first circuit board 33, the material of the connecting member 41 can be a flexible metal. In some embodiments, the material of the connecting member 41 can be alloy copper, such as copper-nickel-silicon, phosphor bronze, etc. In order to reduce the risk of connection failure caused by insufficient strength of the connecting member 41 after being welded to the second circuit board 32, the fixing member 45 is arranged to connect the housing 43 and the second circuit board 32, and to support the connecting member 41 through the fixing member 45. In some embodiments, the material of the fixing member 45 can be tungsten carbide, titanium carbide, etc.

[0253] The technical scheme of the embodiments of the present application is that the hardness of the fixing member 45 is greater than the hardness of the connecting member 41, which is conducive to improving the reliability of the connector 40 in connecting the first circuit board 33.

[0254] The embodiments of the present application also provide an electric device, which comprises the battery device 1 of any of the above embodiments, and the battery device 1 is used to provide electric energy for the electric device.

[0255] Please refer to Figure 4 to Figure 8 In some embodiments, the battery device 1 comprises a box 10, a battery cell 20 and a high-voltage box assembly 30. The battery cell 20 is arranged in the box 10. The high-voltage box assembly 30 comprises a mounting 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 connected to the mounting 31, the mounting 31 is connected to the box 10, the first circuit board 33 is connected to the battery cell 20 for collecting information of the battery cell 20 and generating an electrical signal, the second circuit board 32 is used for receiving the electrical signal, one end of the connector 40 is welded to the first circuit board 33, and the other end of the connector 40 is inserted into the second circuit board 32.

[0256] 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.

[0257] In some embodiments, the connector 40 can comprise a connecting piece 41, the connecting piece 41 comprises a first connecting segment 411 and a second connecting segment 413 connected to each other, and the first connecting segment 411 is formed with a connecting groove 4111. The high-voltage box assembly 30 further comprises a connecting column 322, one end of the connecting column 322 is connected to the second circuit board 32, and the other end of the connecting column 322 is clamped into the connecting groove 4111. The second connecting segment 413 is welded to the first circuit board 33.

[0258] The technical scheme of the embodiments of the present application makes the distance between the second circuit board 32 and the first circuit board 33 close by connecting the second circuit board 32 and the first circuit board 33 to the mounting 31, and one end of the connector 40 is welded to the first circuit board 33, and the other end of the connector 40 is inserted into the second circuit board 32, compared with connecting the connector 40 and the second circuit board 32 by a wire harness or connecting the connector 40 and the first circuit board 33 by a wire harness, the use of the wire harness is reduced, the cost is saved, the weight of the high-voltage box assembly 30 is reduced, the weight of the battery device 1 is reduced, and the energy density of the battery device 1 is improved.

[0259] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; The battery cell is disposed inside the housing; A high-voltage box assembly includes a mounting component, a first circuit board, a second circuit board, and a connector. Both the first and second circuit boards are connected to the mounting component, which is connected to the housing. One of the first and second circuit boards is connected to the battery cell to collect information from the battery cell and generate an electrical signal, while the other is used to receive the electrical signal. One end of the connector is soldered to the first circuit board, and the other end is inserted into the second circuit board. The connector includes a connector, the connector includes a first connecting segment, the second circuit board is provided with a first connecting hole, and the first connecting segment is snapped into the first connecting hole; The first connecting segment includes a first sub-connecting segment and a second sub-connecting segment. Along the first direction, the end of the first sub-connecting segment facing the first circuit board is connected to the end of the second sub-connecting segment facing the first circuit board. In the 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 snap into the first connecting hole, the first sub-connecting segment and the second sub-connecting segment move closer to each other to compress the cavity. The first direction is perpendicular to the second direction. Along the first direction, the end of the first sub-connecting segment away from the first circuit board is connected to the end of the second sub-connecting segment away from the first circuit board; The connector further includes an elastic element disposed within the cavity, wherein, in the second direction, both ends of the elastic element abut against the first sub-connecting segment and the second sub-connecting segment, respectively.

2. The battery device according to claim 1, characterized in that, The connector includes a connector, the connector including a second connecting segment facing away from the second circuit board; The first circuit board is provided with a second connection hole, the second connection segment passes through the second connection hole, and the second connection segment is soldered to the first circuit board.

3. The battery device according to any one of claims 1-2, characterized in that, The number of the connectors is multiple, and the multiple connectors are arranged at intervals; The connector also includes a housing made of insulating material. The housing has a plurality of spaced-apart first through holes, and one connector is inserted through one of the first through holes.

4. The battery device according to claim 3, characterized in that, The connector also includes a plurality of spacers connected to the housing and located between any two adjacent connectors; the spacers are made of insulating material.

5. The battery device according to claim 4, characterized in that, The first circuit board is provided with a third connection hole, one end of the partition is connected to the outer shell, and the other end is inserted into the third connection hole.

6. The battery device according to claim 3, characterized in that, The material of the outer shell includes at least one of ceramic-based materials, polymer-based composite materials, and glass fiber.

7. The battery device according to claim 3, 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 which is connected to the housing and the other end is inserted into the fourth connection hole; The hardness of the fastener is greater than that of the connector.

8. An electrical device, characterized in that, The battery device includes any one of claims 1-7, wherein the battery device is used to provide electrical energy to the electrical device.

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