Battery device and electric device

Abstract

The invention discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a circuit board and a first connector, the first connector is installed on the circuit board, the first connector comprises a shell and a plurality of connecting terminals, the shell is made of an insulating material, and the connecting terminals are connected to the shell and isolated from one another through the shell; wherein each connecting terminal comprises a first terminal piece and a second terminal piece which are formed in a split mode, the first terminal piece is welded to the circuit board, and the second terminal piece is electrically connected with the first terminal piece and the sampling assembly. The connecting terminal comprises the first terminal piece and the second terminal piece which are formed in a split manner, so that the first terminal piece and the second terminal piece are convenient to process; and the processing precision of the first terminal piece and the second terminal piece can be conveniently controlled, so that the overall tolerance of the connecting terminals is reduced, the distance between the plurality of connecting terminals and the circuit board can be conveniently controlled to be within the range required by welding, and the risk of pseudo soldering of the connecting terminals and the circuit board is reduced.

Description

Technical Field

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

[0002] Batteries are widely used in the field of new energy, such as electric vehicles and new energy vehicles. New energy vehicles and electric vehicles have become a new development trend in the automotive industry. In order to facilitate the management of battery devices, it is necessary to collect the voltage and temperature of each battery cell in the battery device through a sampling device. The sampling device is electrically connected to the circuit board of the control mechanism through the connecting terminal of the connector. The connecting terminal needs to be bent many times, and the tolerance is accumulated to the end where the connecting terminal and the circuit board are welded, which makes it difficult to control the distance between the connecting terminal and the circuit board, thereby increasing the risk of poor welding between the connecting terminal and the circuit board, thereby reducing the reliability of the battery device. Summary of the invention

[0003] The embodiments of the present application provide a battery device and an electrical device that can reduce the risk of poor soldering between connection terminals and circuit boards, thereby improving the reliability of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device comprising a circuit board and a first connector; the first connector is installed on the circuit board, the first connector comprises a shell and a plurality of connecting terminals, the shell is made of an insulating material, the plurality of connecting terminals are connected to the shell and isolated from each other by the shell; wherein each of the connecting terminals comprises a first terminal member and a second terminal member which are separately formed, the first terminal member is welded to the circuit board, and the second terminal member is used to electrically connect the first terminal member and the sampling component.

[0005] In the above technical scheme, the connecting terminal includes a first terminal member and a second terminal member which are separately formed, the first terminal member is welded to the circuit board, and the second terminal member is electrically connected to the first terminal member and the sampling assembly, so that the connecting terminal can electrically connect the circuit board and the sampling assembly; at the same time, compared with the case where the connecting terminal is formed in one piece, the connecting terminal is set to two parts and then a plurality of structures that need to be bent are respectively set on the first terminal member and the second terminal member, thereby reducing the number of times a single part needs to be bent. On the one hand, it is convenient to process the first terminal member and the second terminal member; on the other hand, it is convenient to control the processing accuracy of the first terminal member and the second terminal member, thereby reducing the overall tolerance of the connecting terminal, thereby facilitating controlling the distance between the plurality of connecting terminals and the circuit board to be within the range required for welding, thereby reducing the risk of cold soldering between the connecting terminal and the circuit board, thereby improving the reliability of the battery device.

[0006] In some embodiments, the first terminal piece is bent and the second terminal piece is straight.

[0007] In the above technical solution, the first terminal member is bent and the second terminal member is straight, that is, the first terminal member is formed by one bending, and the second terminal member does not need to be bent. Therefore, compared with the case where the connecting terminal is formed as one piece, the total number of times the connecting terminal needs to be bent is reduced, thereby reducing the accumulation of tolerances, thereby further reducing the overall tolerance of the connecting terminal, thereby facilitating the control of the distance between the multiple connecting terminals and the circuit board to be within the range required for welding, thereby further reducing the risk of cold soldering between the connecting terminals and the circuit board, thereby improving the reliability of the battery device.

[0008] In some embodiments, the length direction of the second terminal member intersects with the thickness direction of the circuit board.

[0009] In the above technical solution, the length direction of the second terminal piece intersects with the thickness direction of the circuit board, so that the second terminal piece extends in a direction not perpendicular to the circuit board, and then when the sampling component is electrically connected to the second terminal piece, it can have a certain distance from the circuit board in a direction perpendicular to the thickness direction of the circuit board. Compared with the situation where the second terminal piece extends in the thickness direction of the circuit board, it is convenient to set up the sampling component and is conducive to simplifying the installation of the battery device.

[0010] In some embodiments, the first terminal member abuts against the second terminal member.

[0011] In the above technical solution, the first terminal member abuts against the second terminal member, thereby reducing a bending structure of the connecting terminal, reducing the total number of times the connecting terminal needs to be bent, thereby reducing the accumulation of tolerances, and further reducing the overall tolerance of the connecting terminal, thereby facilitating the control of the distance between multiple connecting terminals and the circuit board to be within the range required for welding, thereby further reducing the risk of poor soldering between the connecting terminals and the circuit board, thereby improving the reliability of the battery device.

[0012] In some embodiments, the first terminal member includes a main body and an elastic portion, the main body is welded to the circuit board, and the elastic portion abuts against the second terminal member.

[0013] In the above technical solution, the elastic part abuts against the second terminal piece. On the one hand, the elastic part can be elastically deformed to be attached to the peripheral side of the second terminal piece, thereby increasing the abutment area at the abutment point between the first terminal piece and the second terminal piece, thereby increasing the reliability of the electrical connection between the first terminal piece and the second terminal piece; on the other hand, when the second terminal piece is subjected to external forces such as the sampling component or other components and moves relative to the first terminal piece, the elastic part can maintain the abutment between the first terminal piece and the second terminal piece through elastic deformation, thereby increasing the reliability of the electrical connection between the first terminal piece and the second terminal piece.

[0014] In some embodiments, the elastic portion is a cantilever structure with one end connected to the main body.

[0015] In the above technical solution, the elastic part has a simple structure, one end of the elastic part is connected to the main body, and the other end of the elastic part is suspended as a free end and is used to abut against the second terminal member, so that there is a certain space between the elastic part and the main body for the elastic part to deform elastically, so that the elastic part can be better attached to the peripheral side of the second terminal, thereby increasing the abutment area at the abutment point between the first terminal member and the second terminal member, thereby increasing the reliability of the electrical connection between the first terminal member and the second terminal member.

[0016] In some embodiments, the main body includes a welding part and a connecting part, the welding part is welded to the circuit board, the connecting part is arranged at an angle with the welding part, one end of the connecting part is connected to the welding part, and the elastic part is arranged at the other end of the connecting part.

[0017] In the above technical solution, the connecting portion and the welding portion are arranged at an angle, one end of the connecting portion is connected to the welding portion, that is, the main body is bent, and the elastic portion is arranged at the other end of the connecting portion and is used to abut against the second terminal member, so that the elastic portion can absorb the tolerance caused by the bending of the main body through elastic deformation, thereby further reducing the overall tolerance of the connecting terminal, thereby facilitating the control of the distance between the multiple connecting terminals and the circuit board to be within the range required for welding, thereby further reducing the risk of cold soldering between the connecting terminals and the circuit board, thereby improving the reliability of the battery device.

[0018] In some embodiments, the length direction of the welding portion is perpendicular to the thickness direction of the circuit board, and the length direction of the connecting portion is parallel to the thickness direction of the circuit board.

[0019] In the above technical solution, the length direction of the welding portion is perpendicular to the thickness direction of the circuit board, so that the welding portion can extend in a direction parallel to the circuit board, so that when the width of the welding portion is constant, it is convenient to increase the area of ​​the welding portion by extending the length of the welding portion, thereby increasing the connection area between the first terminal and the circuit board, thereby further reducing the risk of cold soldering between the connecting terminal and the circuit board, thereby improving the reliability of the battery device; the length direction of the connecting portion is parallel to the thickness direction of the circuit board, so that the connecting portion can extend in the thickness direction of the circuit board, and then the second terminal member abutting the connecting portion through the elastic portion can have a certain distance from the circuit board in the thickness direction of the circuit board, thereby giving the sampling component a certain installation space, facilitating the electrical connection between the sampling component and the second terminal member, and helping to simplify the installation of the battery device. At the same time, compared with the situation where the length direction of the connecting portion is not parallel to the thickness direction of the circuit board, when the distance between the second terminal member and the circuit board in the thickness direction of the circuit board is constant, the length of the connecting portion is reduced, thereby reducing the materials required for the production of the connecting portion and reducing the production cost of the main body.

[0020] In some embodiments, a length direction of the welding portion is parallel to a length direction of the second terminal member.

[0021] In the above technical solution, the length direction of the welding portion is parallel to the length direction of the second terminal member, thereby reducing the volume occupied by the first terminal member in the first direction (the first direction, the length direction of the second terminal, and the thickness direction of the circuit board are perpendicular to each other) relative to the situation where the length direction of the welding portion intersects with the length direction of the second terminal member, thereby reducing the volume occupied by the connecting terminal in the first direction, thereby facilitating the arrangement of multiple connecting terminals along the first direction.

[0022] In some embodiments, along the thickness direction of the circuit board, a side of the soldering portion facing away from the circuit board abuts against the housing.

[0023] In the above technical solution, along the thickness direction of the circuit board, the side of the welding portion facing away from the circuit board abuts against the shell, and then the welding portion of the first terminal piece of the multiple connecting terminals is limited by the shell, and the tolerance of the first terminal piece in the thickness direction of the circuit board is absorbed by the elastic portion, so that the welding portions of the multiple connecting terminals facing the circuit board are all located on the same reference plane, thereby further reducing the risk of poor soldering between the connecting terminals and the circuit board, thereby improving the reliability of the battery device.

[0024] In some embodiments, the shell has a first mounting hole and a second mounting hole, the second mounting hole is connected to the first mounting hole, the connecting portion is accommodated in the first mounting hole, and a portion of the second terminal is accommodated in the second mounting hole.

[0025] In the above technical solution, the second mounting hole is connected to the first mounting hole, the connecting part is accommodated in the first mounting hole, and a part of the second terminal member is accommodated in the second mounting hole, so that the abutment point between the elastic part and the second terminal member is located in the first mounting hole and the second mounting hole, and then the first mounting hole and the second mounting hole provide structural protection for the elastic part, reducing the risk of the remaining structural parts of the battery device extending into between the elastic part and the second terminal member, resulting in failure of the electrical connection between the first terminal member and the second terminal member, thereby improving the reliability of the battery device.

[0026] In some embodiments, a limiting protrusion is formed on the outer surface of the connecting portion, and the limiting protrusion is interference-fitted with the first mounting hole.

[0027] In the above technical solution, the limiting protrusion is interference fit with the second mounting hole, so that the connecting part can be relatively fixed in the axial direction of the second mounting hole relative to the second mounting hole, thereby limiting the axial movement of the connecting part in the second mounting hole due to the elastic force generated after the elastic part and the second terminal member abut, thereby reducing the risk of the welding parts of multiple connecting terminals facing the circuit board not being located on the same reference plane due to the axial movement of the connecting part in the second mounting hole, thereby further reducing the risk of poor soldering between the connecting terminals and the circuit board, thereby improving the reliability of the battery device.

[0028] In some embodiments, a plurality of the first terminal members are spaced apart along a first direction, a plurality of barrier portions are protruding from the outer surface of the shell, the barrier portions are located between two adjacent first terminal members, and the first direction is perpendicular to the thickness direction of the circuit board.

[0029] In the above technical solution, the barrier portion is located between two adjacent first terminal members, thereby reducing the risk of the two adjacent first terminal members abutting against each other in the first direction and causing an internal short circuit in the battery device.

[0030] In some embodiments, the plurality of connecting terminals include a plurality of first connecting terminals and a plurality of second connecting terminals, the first connecting terminals and the second connecting terminals are alternately arranged along a first direction, the second terminal pieces of the plurality of first connecting terminals are arranged in one row, and the second terminal pieces of the plurality of second connecting terminals are arranged in another row, and the two rows of the second terminal pieces are spaced apart along the thickness direction of the circuit board, and the first direction is perpendicular to the thickness direction of the circuit board.

[0031] In the above technical solution, the second terminal members of the plurality of first connecting terminals are arranged in one row, and the second terminal members of the plurality of second connecting terminals are arranged in another row, and the two rows of second terminal members are spaced apart along the thickness direction of the circuit board, so that the second terminal members of the plurality of connecting terminals make full use of the space of the connector in the thickness direction of the circuit board, thereby reducing the size of the connecting members in the first direction relative to the situation in which the second terminal members of the plurality of connecting terminals are spaced apart in a row along the first direction.

[0032] In some embodiments, the first terminal member abuts against the second terminal member along the thickness direction of the circuit board; in the thickness direction of the circuit board, the size of the first terminal member of the first connecting terminal is not equal to the size of the first terminal member of the second connecting terminal.

[0033] In the above technical solution, in the thickness direction of the circuit board, the size of the first terminal piece of the first connecting terminal is not equal to the size of the first terminal piece of the second connecting terminal, so that the first terminal piece of the first connecting terminal and the first terminal piece of the second connecting terminal are respectively abutted against two rows of second terminal pieces spaced apart along the thickness direction of the circuit board, and the structure is simple and easy to implement.

[0034] In some embodiments, the first connector further includes a fixing member, the fixing member is connected to the housing, and the fixing member is welded to the circuit board.

[0035] In the above technical solution, the fixing member is connected to the shell, and the fixing member is welded to the circuit board, so that the movement of the shell relative to the circuit board is limited by the fixing member, thereby reducing the risk of failure of the connection between the first terminal and the circuit board due to movement of the shell relative to the circuit board due to external force, thereby improving the reliability of the battery device.

[0036] In some embodiments, a plurality of the first terminal members are spaced apart along the first direction, two fixing members are provided, and the two fixing members are respectively located at two ends of the shell along the first direction.

[0037] In the above technical solution, the two fixing members are respectively located at the two ends of the shell along the first direction, so that the supporting force of the fixing members on the shell is more uniform, thereby further reducing the risk of failure of the connection between the first terminal and the circuit board due to the movement of the shell relative to the circuit board due to external force, thereby improving the reliability of the battery device.

[0038] In some embodiments, a positioning column is formed on the housing, a positioning hole is formed on the circuit board, and the positioning column cooperates with the positioning hole.

[0039] In the above technical solution, a positioning post is formed on the shell, and a positioning hole is formed on the circuit board. The positioning post cooperates with the positioning hole. On the one hand, during assembly, the first connector can be conveniently positioned by the positioning post and the positioning hole, thereby facilitating the assembly of the battery device; on the other hand, the positioning post cooperates with the positioning hole, so that the movement of the shell relative to the circuit board in a direction parallel to the circuit board is limited by the positioning post, thereby reducing the risk of failure of the connection between the first terminal and the circuit board due to the movement of the shell relative to the circuit board due to external force, thereby improving the reliability of the battery device.

[0040] In some embodiments, the battery device also includes multiple battery cells, a busbar, and a sampling assembly; the busbar is used to achieve electrical connection between the multiple battery cells; the sampling assembly includes a second connector and a sampling wire, and the second connector is plugged into the first connector; the sampling wire has a sampling end and a connecting end, the sampling end is connected to the busbar or the battery cell, and the connecting end is connected to the second connector.

[0041] In the above technical solution, the sampling wire and the first connector can be quickly connected via the second connector, thereby facilitating the electrical connection between the sampling assembly and the circuit board, which is beneficial to simplifying the installation of the battery device.

[0042] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 An exploded view of a battery device provided in some embodiments of the present application; Figure 3 An exploded view of the structure of another battery device provided in some embodiments of the present application; Figure 4 An exploded view of the structure of a first connector provided in some embodiments of the present application; Figure 5 An exploded view of the structure of the connection terminal provided in some embodiments of the present application; Figure 6 A schematic diagram of the structure of a connection terminal provided in some embodiments of the present application; Figure 7 A schematic diagram of the structure of another connection terminal provided in some embodiments of the present application; Figure 8 A schematic diagram of the structure of another connection terminal provided in some embodiments of the present application; Fig. 9 A schematic diagram of the structure of another connection terminal provided in some embodiments of the present application; Fig.10 A schematic diagram of the structure of a first connector and a circuit board provided in some embodiments of the present application; Fig.11 for Fig.10 Sectional view of AA in the middle; Fig.12 for Fig.11 Enlarged view of point C in the middle; Fig.13 for Fig.11 The enlarged view of point D in the middle; Fig.14 A schematic diagram of the structure of another first mounting hole provided in some embodiments of the present application; Fig.15 for Fig.10 The enlarged view of point B in the middle; Fig.16 A schematic diagram of the structure of a first connection terminal and a second connection terminal provided in some embodiments of the present application; Fig.17 A cross-sectional view of a first connector provided for some embodiments of the present application; Fig.18 An exploded view of the structure of another first connector provided in some embodiments of the present application.

[0045] Icon: 1000-vehicle; 100-battery device; 200-controller; 300-motor; 10-box; 11-first box conductive terminal; 12-second box conductive terminal; 20-battery cell; 21-busbar; 30-circuit board; 31-positioning hole; 40-first connector; 41-housing; 41A-first mounting hole; 41B-second mounting hole; 41C-slot; 41D-third convex portion; 41E-second guide surface; 41F-second stop surface; 41G-jack; 411-first wall; 411A-first convex portion; 411B-second convex portion; 411C-blocking portion; 42-connecting terminal; 42A-first connecting terminal; 42B-second connecting terminal; 421-first terminal member; 4211-main body; 42111-welding portion; 42112-connecting portion; 42112A-limiting convex portion; 42112B-first guide surface; 42112C-first stop surface; 4212-elastic portion; 422-second terminal member; 43-fixing member; 44-positioning column; 50 - second connector; 60-sampling component; X-thickness direction of the circuit board; Y-length direction of the second terminal piece; Z-first direction. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0048] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0052] The term “plurality” used in this application refers to two or more (including two).

[0053] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0054] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0055] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to reduce the risk of short circuit between the positive and negative electrodes, while allowing active ions to pass through.

[0056] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include battery cells, which are connected in series, in parallel or in mixed connection through a busbar.

[0057] In some embodiments, a battery cell assembly is generally formed by arranging battery cell assemblies; as an example, a battery cell assembly may be a battery module, which is formed by arranging and fixing battery cell assemblies to form an independent module. As an example, a battery module may be formed by bundling battery cell assemblies with cable ties.

[0058] In some embodiments, the battery device may be a battery pack, which includes a case assembly and one or more battery cell assemblies, wherein the battery cell assembly is accommodated in the case assembly.

[0059] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box assembly by fixing the battery module in the box assembly.

[0060] As an example, the battery cell assembly may also be accommodated in the case assembly by directly fixing the battery cell assembly to the case assembly.

[0061] As an example, the box assembly may include a first box conductive terminal and a second box conductive terminal. The first box conductive terminal and the second box conductive terminal are buckled together to form a closed space inside the box assembly to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box conductive terminal can be a top cover or a bottom plate.

[0062] As an example, the box assembly may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box assembly to accommodate the battery cell assembly.

[0063] In some embodiments, the electric device may be a vehicle.

[0064] As an example, the box assembly can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box assembly can become at least a part of the floor of the vehicle, or the frame of the box assembly can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0065] In some embodiments, the battery device refers to an energy storage device, which includes a box assembly, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0066] In recent years, electric vehicles have developed by leaps and bounds. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. As the core component of electric vehicles, battery devices have high requirements in terms of energy density. In order to facilitate the management of battery devices, it is necessary to collect the voltage and temperature of each battery cell in the battery device through a sampling device. The sampling device is electrically connected to the circuit board of the control mechanism through the connecting terminal of the connector. The connecting terminal is generally bent multiple times so that there is a certain distance between the end of the connecting terminal used for electrical connection to the sampling component and the circuit board to provide installation space for the connecting terminal and the structural parts of the sampling component. Since the end of the connecting terminal used for electrical connection to the sampling component needs to be relatively fixed to facilitate the assembly of the battery device, the tolerance generated by the multiple bending of the connecting terminal is accumulated to the end of the connecting terminal that is welded to the circuit board. Since there are multiple connecting terminals, it is difficult for the sides of the ends of the multiple connecting terminals used for welding to the circuit board that face the circuit board to be located on the same plane, resulting in a large distance between another part of the connecting terminals and the circuit board when some of the connecting terminals are in contact with the circuit board, resulting in cold soldering when the part of the connecting terminals is welded to the circuit board, which leads to failure of the electrical connection, thereby reducing the reliability of the battery device.

[0067] Based on the above considerations, in order to solve the problem of partial connection terminals and circuit boards being poorly soldered due to tolerances caused by multiple bending of the connection terminals. An embodiment of the present application provides a battery device including a circuit board and a first connector; the first connector is mounted on the circuit board, the first connector includes a shell and a plurality of connection terminals, the shell is made of insulating material, the plurality of connection terminals are connected to the shell and isolated from each other by the shell; wherein each of the connection terminals includes a first terminal member and a second terminal member formed separately, the first terminal member is welded to the circuit board, and the second terminal member is electrically connected to the first terminal member and the sampling component.

[0068] In a battery device of this structure, the connecting terminal includes a first terminal member and a second terminal member which are separately formed, the first terminal member is welded to the circuit board, and the second terminal member is electrically connected to the first terminal member and the sampling assembly, so that the connecting terminal can electrically connect the circuit board and the sampling assembly; at the same time, compared with the case where the connecting terminal is formed in one piece, the connecting terminal is provided with two parts and then a plurality of structures that need to be bent are respectively provided on the first terminal member and the second terminal member, thereby reducing the number of times a single part needs to be bent. On the one hand, it is convenient to process the first terminal member and the second terminal member; on the other hand, it is convenient to control the processing accuracy of the first terminal member and the second terminal member, thereby reducing the overall tolerance of the connecting terminal, thereby facilitating controlling the distance between the plurality of connecting terminals and the circuit board to be within the range required for welding, thereby reducing the risk of cold soldering between the connecting terminal and the circuit board, thereby improving the reliability of the battery device.

[0069] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0070] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0071] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom of the vehicle 1000, or at the head of the vehicle 1000, or at the tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source or a power source for the vehicle 1000, etc. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0072] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source or a usage power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0073] Please refer to Figure 2 , Figure 2 The structure of a battery device 100 provided in some embodiments of the present application is exploded. The battery device 100 includes a box body 10 and a battery cell 20. The battery cell 20 is used to be accommodated in the box body 10.

[0074] The box body 10 is used to provide an assembly space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box conductive terminal 11 and a second box conductive terminal 12, the first box conductive terminal 11 and the second box conductive terminal 12 cover each other, and the first box conductive terminal 11 and the second box conductive terminal 12 jointly define an assembly space for accommodating the battery cell 20. The second box conductive terminal 12 may be a hollow structure with one end open, and the first box conductive terminal 11 may be a plate-like structure, and the first box conductive terminal 11 covers the open side of the second box conductive terminal 12, so that the first box conductive terminal 11 and the second box conductive terminal 12 jointly define an assembly space; the first box conductive terminal 11 and the second box conductive terminal 12 may also be hollow structures with one side open, and the open side of the first box conductive terminal 11 covers the open side of the second box conductive terminal 12.

[0075] Of course, the box body 10 formed by the first box conductive terminal 11 and the second box conductive terminal 12 can be in various shapes, such as a cylinder, a cuboid, or a cube. Figure 2 In the embodiment, the box body 10 is in the shape of a rectangular parallelepiped.

[0076] In the battery device 100, the battery cell 20 disposed in the box 10 may be one or more. When there are more than one battery cell 20 disposed in the box 10, the multiple battery cells 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 may also be a battery module formed by first connecting multiple battery cells 20 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and then the whole is accommodated in the box 10.

[0077] In some embodiments, the battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component, which is used to connect the plurality of battery cells 20 to achieve electrical connection between the plurality of battery cells 20 .

[0078] Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be in a rectangular parallelepiped, a cylinder, a prism or other shapes. For example, Figure 3 In the figure, the battery cell 20 is a rectangular parallelepiped structure.

[0079] Please refer to Figure 3 and Figure 4 , Figure 3This is an exploded view of another battery device 100 provided in some embodiments of the present application. Figure 4 An exploded view of the structure of the first connector 40 provided in some embodiments of the present application. The embodiments of the present application provide a battery device 100 including a circuit board 30 and a first connector 40; the first connector 40 is mounted on the circuit board 30, the first connector 40 includes a housing 41 and a plurality of connection terminals 42, the housing 41 is made of insulating material, and the plurality of connection terminals 42 are connected to the housing 41 and isolated from each other by the housing 41; wherein each connection terminal 42 includes a first terminal piece 421 and a second terminal piece 422 formed separately, the first terminal piece 421 is welded to the circuit board 30, and the second terminal piece 422 is used to electrically connect the first terminal piece 421 and the sampling component 60.

[0080] The circuit board 30 includes but is not limited to a printed circuit board 30 or a flexible circuit board 30 and the like.

[0081] The first connector 40 is installed on the circuit board 30. It should be noted that installation can mean that the first connector 40 is detachably installed on the circuit board 30, or installation can also mean that the first connector 40 is non-detachably installed on the circuit board 30. For example, the first connector 40 is welded or bonded to the circuit board 30, or the first connector 40 and the circuit board 30 are connected via a slot 41C, a snap-on connection, etc.

[0082] The housing 41 is a protective structure that is sleeved over the plurality of connection terminals 42. By way of example, the structure of the housing 41 includes, but is not limited to, a shell-like structure, a frame structure, etc. Of course, the housing 41 may also include other special-shaped structures. The housing 41 fixes and correctly aligns the connection terminals 42, and the housing 41 may also protect the connection terminals 42 from dust and dirt.

[0083] The shell 41 is made of insulating material, which means that the shell 41 can be made of insulating material from the inside to the outside, or it can have only a layer of insulating material on the surface. For example, the shell 41 is made of one of PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PC (polycarbonate) or PS (polystyrene); for another example, the shell 41 includes a conductive terminal made of metal and an insulating layer wrapping the conductive terminal.

[0084] The connecting terminal 42 is a conductive member used to electrically connect the sampling component 60 and the circuit board 30; illustratively, one end of the connecting terminal 42 can be directly connected to the sampling component 60 by welding, snap-on, and plug-in, or indirectly connected to the sampling component 60 through other conductive members; the other end of the connecting terminal 42 can be connected to the circuit board 30 by welding or bonding, thereby electrically connecting the sampling component 60 and the circuit board 30.

[0085] It can be understood that the connection terminal 42 can be made of conductive metal (such as copper, iron, aluminum).

[0086] Multiple connecting terminals 42 are connected to the shell 41 and isolated from each other by the shell 41. It can be understood that the shell 41 is used to fix the connecting terminals 42, and at least a portion of the shell 41 is arranged between adjacent connecting terminals 42 to limit the overlapping of the connecting terminals 42, thereby insulating and isolating the connecting terminals 42.

[0087] In some embodiments, a slot 41C is provided on the housing 41. The housing 41 is used to fix the connection terminal 42, and to make one end of the multiple connection terminals 42 electrically connected to the sampling assembly 60 be located in the slot 41C and in the same reference plane, so that the sampling assembly 60 or the conductive member connected to the sampling assembly 60 is connected to the circuit board 30 through the multiple connection terminals 42 at the same time when inserted into the slot 41C. As a result, the tolerances generated by the multiple bending of the connection terminal 42 are accumulated to the end where the connection terminal 42 is welded to the circuit board 30. Since there are multiple connection terminals 42, it is difficult for the side of the end of the multiple connection terminals 42 used for welding to the circuit board 30 to face the circuit board 30 to be located on the same plane, so that when some connection terminals 42 abut against the circuit board 30, there is a large distance between the other connection terminals 42 and the circuit board 30, so that when the part of the connection terminals 42 is welded to the circuit board 30, there is a phenomenon of cold welding, which leads to failure of electrical connection, thereby reducing the reliability of the battery device 100.

[0088] The first terminal member 421 and the second terminal member 422 are two conductive terminals of the connecting terminal 42, wherein the first terminal member 421 is a structural member in the connecting terminal 42 for welding or bonding with the circuit board 30, and the second terminal member 422 is a structural member in the connecting terminal 42 for connecting with the sampling component 60 or connecting with the conductive member connected to the sampling component 60.

[0089] It can be understood that the first terminal member 421 and the second terminal member 422 can be electrically connected by direct abutment or by indirect abutment through a conductive member.

[0090] In this embodiment, the connection terminal 42 includes a first terminal member 421 and a second terminal member 422 which are separately formed. The first terminal member 421 is welded to the circuit board 30, and the second terminal member 422 is electrically connected to the first terminal member 421 and the sampling assembly 60, so that the connection terminal 42 can be electrically connected to the circuit board 30 and the sampling assembly 60; at the same time, compared with the case where the connection terminal 42 is integrally formed, the connection terminal 42 is set to two parts and then a plurality of structures that need to be bent are respectively set on the first terminal member 421 and the second terminal member 422, thereby reducing the number of times a single part needs to be bent. On the one hand, it is convenient to process the first terminal member 421 and the second terminal member 422; on the other hand, it is convenient to control the processing accuracy of the first terminal member 421 and the second terminal member 422, thereby reducing the overall tolerance of the connection terminal 42, thereby facilitating the control of the distance between the plurality of connection terminals 42 and the circuit board 30 to be within the range required for welding, thereby reducing the risk of poor welding between the connection terminal 42 and the circuit board 30, thereby improving the reliability of the battery device 100.

[0091] Please refer to Figure 5 , Figure 5 An exploded view of the structure of the connection terminal 42 provided in some embodiments of the present application. According to some embodiments of the present application, the first terminal piece 421 is bent, and the second terminal piece 422 is straight.

[0092] The first terminal piece 421 is bent, which means that the first terminal piece 421 has two parts connected to each other, and the extension directions of the two parts form an angle.

[0093] The second terminal 422 being straight means that the second terminal 422 extends along one direction.

[0094] In this embodiment, the first terminal member 421 is bent and the second terminal member 422 is straight, that is, the first terminal member 421 is formed by one bending, and the second terminal member 422 does not need to be bent. Therefore, compared with the case where the connecting terminal 42 is formed as an integral part, the total number of times the connecting terminal 42 needs to be bent is reduced, thereby reducing the accumulation of tolerances, thereby further reducing the overall tolerance of the connecting terminal 42, thereby facilitating controlling the distance between the multiple connecting terminals 42 and the circuit board 30 to be within the range required for welding, thereby further reducing the risk of poor soldering between the connecting terminal 42 and the circuit board 30, thereby improving the reliability of the battery device 100.

[0095] Please refer to Figure 5 According to some embodiments of the present application, the length direction Y of the second terminal member intersects with the thickness direction X of the circuit board.

[0096] The length direction Y of the second terminal member intersects with the thickness direction X of the circuit board. It can be understood that the length direction Y of the second terminal member forms an angle with the thickness direction X of the circuit board; it can also be understood that the length direction Y of the second terminal member is perpendicular to the thickness direction X of the circuit board.

[0097] In this embodiment, the length direction Y of the second terminal piece intersects with the thickness direction X of the circuit board, so that the second terminal piece 422 extends in a direction that is not perpendicular to the circuit board 30, and then when the sampling component 60 is electrically connected to the second terminal piece 422, it can have a certain distance from the circuit board 30 in the direction perpendicular to the thickness direction X of the circuit board. Compared with the situation where the second terminal piece 422 extends along the thickness direction X of the circuit board, it is convenient to set up the sampling component 60, which is beneficial to simplify the installation of the battery device 100.

[0098] Please refer to Figure 5 , and please refer to Figure 6-Figure 8 , Figure 6-Figure 8 Schematic diagram of the structure of three connection terminals 42 provided in some embodiments of the present application. According to some embodiments of the present application, the first terminal member 421 abuts against the second terminal member 422.

[0099] The abutment between the first terminal 421 and the second terminal 422 may refer to the pressing with the mutual abutment force between the first terminal 421 and the second terminal 422 ; or may refer to the fitting without the mutual abutment force between the first terminal 421 and the second terminal 422 .

[0100] It can be understood that the first terminal piece 421 and the second terminal piece 422 can abut against each other in any direction.

[0101] In some embodiments, please refer to Figure 6 One end of the first terminal 421 away from the circuit board (not shown in the figure) in the thickness direction X of the circuit board abuts against the side of the second terminal 422 facing the circuit board (not shown in the figure) in the thickness direction X of the circuit board.

[0102] In some embodiments, please refer to Figure 7 One end of the second terminal 422 close to the first terminal 421 in the length direction Y of the second terminal abuts against the side of the first terminal 421 facing the second terminal 422 in the length direction Y of the second terminal.

[0103] In some embodiments, please refer to Figure 8The side of the first terminal member 421 facing the second terminal member 422 in the first direction Z abuts against the side of the second terminal member 422 facing the first terminal member 421 in the first direction Z along the first direction Z, and the first direction Z, the length direction Y of the second terminal member and the thickness direction of the circuit board are perpendicular to each other.

[0104] In this embodiment, the first terminal member 421 is abutted against the second terminal member 422 to replace a bending structure of the connecting terminal 42, thereby reducing one bending structure of the connecting terminal 42 and reducing the total number of times the connecting terminal 42 needs to be bent, thereby reducing the accumulation of tolerances, thereby further reducing the overall tolerance of the connecting terminal 42, thereby facilitating the control of the distance between the multiple connecting terminals 42 and the circuit board 30 to be within the range required for welding, thereby further reducing the risk of poor soldering between the connecting terminal 42 and the circuit board 30, thereby improving the reliability of the battery device 100.

[0105] Please refer to Figure 4 and Fig. 9 , and please refer to Fig.10 , Fig. 9 This is a schematic diagram of the structure of another connection terminal 42 provided in some embodiments of the present application. Fig.10 Schematic diagram of the structure of the first connector 40 and the circuit board 30 provided in some embodiments of the present application. According to some embodiments of the present application, the first terminal 421 includes a main body 4211 and an elastic portion 4212, the main body 4211 is welded to the circuit board 30, and the elastic portion 4212 abuts against the second terminal 422.

[0106] The main body 4211 is a portion of the first terminal 421 used for connecting to the circuit board 30 .

[0107] The elastic portion 4212 may be a portion of the first terminal member 421 that can produce elastic deformation. The elastic portion 4212 may be integrally formed with the main body 4211 , or may be separately provided and connected by other means, such as welding, bonding or clamping.

[0108] Exemplarily, the elastic portion 4212 may be an elastic element such as a spring or an elastic sheet.

[0109] It can be understood that the elastic portion 4212 is made of a conductive metal (such as copper, iron, aluminum) so that the elastic portion 4212 can electrically connect the second terminal 422 and the main body 4211 .

[0110] In this embodiment, the elastic portion 4212 is abutted against the second terminal member 422. On the one hand, the elastic portion 4212 can be elastically deformed to be attached to the peripheral side of the second terminal member 422, thereby increasing the abutment area at the abutment point between the first terminal member 421 and the second terminal member 422, thereby increasing the reliability of the electrical connection between the first terminal member 421 and the second terminal member 422; on the other hand, when the second terminal member 422 is subjected to external forces such as the sampling component 60 or other components and moves relative to the first terminal member 421, the elastic portion 4212 can maintain the abutment between the first terminal member 421 and the second terminal member 422 through elastic deformation, thereby increasing the reliability of the electrical connection between the first terminal member 421 and the second terminal member 422.

[0111] Please refer to Figure 5 and Fig. 9 According to some embodiments of the present application, the elastic portion 4212 is a cantilever structure with one end connected to the main body 4211 .

[0112] The cantilever structure may refer to that one end of the elastic part 4212 is connected to the side or end surface of the main body 4211, and the other end is suspended freely. The elastic part 4212 may be in a strip shape, one end of the elastic part 4212 is connected to the side or end surface of the main body 4211, and the other end of the elastic part 4212 is freely suspended and extends in a direction away from the end of the second terminal 422 connected to the sampling assembly 60.

[0113] In some embodiments, on a plane perpendicular to the first direction Z, the orthographic projection of the second terminal piece 422 partially overlaps with the orthographic projection of the main body 4211, one end of the elastic portion 4212 is connected to the side of the main body 4211 facing the second terminal piece 422 in the first direction Z, and the other end of the elastic portion 4212 is freely suspended, with a gap between it and the main body 4211 in the first direction Z, and extends in a direction away from the end of the second terminal piece 422 connected to the sampling assembly 60.

[0114] In some embodiments, please refer to Fig. 9 On the circuit board 30, the orthographic projection of the second terminal piece 422 partially overlaps with the orthographic projection of the main body 4211, one end of the elastic portion 4212 is connected to the end surface of the main body 4211 facing the second terminal piece 422 in the thickness direction X of the circuit board, and the other end of the elastic portion 4212 is freely suspended, and there is a gap with the main body 4211 in the thickness direction X of the circuit board, and extends in a direction away from the end of the second terminal piece 422 connected to the sampling component 60.

[0115] In this embodiment, the elastic portion 4212 has a simple structure, one end of the elastic portion 4212 is connected to the main body 4211, and the other end of the elastic portion 4212 is suspended as a free end and is used to abut against the second terminal member 422, so that there is a certain space between the elastic portion 4212 and the main body 4211 for the elastic portion 4212 to deform elastically, so that the elastic portion 4212 can be better attached to the peripheral side of the second terminal, thereby increasing the abutment area at the abutment point between the first terminal member 421 and the second terminal member 422, thereby increasing the reliability of the electrical connection between the first terminal member 421 and the second terminal member 422.

[0116] Please refer to Figure 5 and Fig. 9 , and please refer to Fig.10 According to some embodiments of the present application, the main body 4211 includes a welding portion 42111 and a connecting portion 42112, the welding portion 42111 is welded to the circuit board 30, the connecting portion 42112 is arranged at an angle to the welding portion 42111, one end of the connecting portion 42112 is connected to the welding portion 42111, and the elastic portion 4212 is arranged at the other end of the connecting portion 42112.

[0117] The welding portion 42111 is a portion of the main body 4211 used to be connected to the circuit board 30 by welding.

[0118] In some implementations, see Fig.10 Part of the welding portion 42111 is located outside the housing 41 to facilitate welding with the circuit board 30.

[0119] The connecting portion 42112 is a portion of the main body 4211 where the elastic portion 4212 is provided to electrically connect to the second terminal member 422 .

[0120] It can be understood that the connecting portion 42112 and the welding portion 42111 are arranged at an angle, that is, the main body 4211 is a bent structure.

[0121] In some embodiments, please refer to Fig. 9On the circuit board 30, the orthographic projection of the second terminal 422 overlaps with the orthographic projection of the main body 4211, one end of the elastic part 4212 is connected to the end face of the main body 4211 facing the second terminal 422 in the thickness direction X of the circuit board, the elastic part 4212 is strip-shaped, and the side of the elastic part 4212 facing the second terminal 422 is a curved surface, the center of curvature of the curved surface is located on the side of the elastic part 4212 away from the second terminal 422, and the curved surface is connected to the side of the main body 4211 facing the second terminal 422 in the length direction Y of the second terminal. The other end of the elastic part 4212 is freely suspended, and there is a gap with the main body 4211 in the thickness direction X of the circuit board, and extends in a direction away from the end of the second terminal 422 connected to the sampling component 60. Thereby, after the operator fixes the first terminal piece 421, when pushing the second terminal piece 422 along the length direction Y of the second terminal piece so that the second terminal piece 422 and the first terminal piece 421 abut against each other, the second terminal piece 422 can move along the side of the elastic part 4212 facing the second terminal piece 422, and drive the free end of the elastic part 4212 to elastically deform toward the main body 4211.

[0122] In this embodiment, the connecting portion 42112 and the welding portion 42111 are arranged at an angle, and one end of the connecting portion 42112 is connected to the welding portion 42111, that is, the main body 4211 is bent, and the elastic portion 4212 is arranged at the other end of the connecting portion 42112, and is used to abut against the second terminal member 422, so that the elastic portion 4212 can absorb the tolerance caused by the bending of the main body 4211 through elastic deformation, thereby further reducing the overall tolerance of the connecting terminal 42, so as to facilitate controlling the distance between the multiple connecting terminals 42 and the circuit board 30 to be within the range required for welding, thereby further reducing the risk of poor soldering between the connecting terminal 42 and the circuit board 30, thereby improving the reliability of the battery device 100.

[0123] Please refer to Figure 4-Figure 10 According to some embodiments of the present application, the length direction of the welding portion 42111 is perpendicular to the thickness direction X of the circuit board, and the length direction of the connecting portion 42112 is parallel to the thickness direction X of the circuit board.

[0124] In this embodiment, the length direction of the soldering portion 42111 is perpendicular to the thickness direction X of the circuit board, so that the soldering portion 42111 can extend in a direction parallel to the circuit board 30, so that when the width of the soldering portion 42111 is constant, it is convenient to increase the area of ​​the soldering portion 42111 by extending the length of the soldering portion 42111, thereby increasing the connection area between the first terminal 421 and the circuit board 30, thereby further reducing the risk of poor soldering between the connecting terminal 42 and the circuit board 30, thereby improving the reliability of the battery device 100; the length direction of the connecting portion 42112 is parallel to the thickness direction X of the circuit board, so that the connecting portion 42112 can extend in the thickness direction X of the circuit board, thereby making The second terminal member 422 abutted against the connecting portion 42112 by the elastic portion 4212 can have a certain distance from the circuit board 30 in the thickness direction X of the circuit board, thereby providing a certain installation space for the sampling component 60, facilitating the electrical connection between the sampling component 60 and the second terminal member 422, and helping to simplify the installation of the battery device 100. At the same time, relative to the situation where the length direction of the connecting portion 42112 is not parallel to the thickness direction X of the circuit board, when the second terminal member 422 can have a certain distance from the circuit board 30 in the thickness direction X of the circuit board, the length of the connecting portion 42112 is reduced, thereby reducing the materials required for the production of the connecting portion 42112, thereby reducing the production cost of the main body 4211.

[0125] Please refer to Figure 4-Figure 10 According to some embodiments of the present application, the length direction of the welding portion 42111 is parallel to the length direction Y of the second terminal piece.

[0126] In this embodiment, the length direction of the welding portion 42111 is parallel to the length direction Y of the second terminal member, thereby reducing the volume occupied by the first terminal member 421 in the first direction Z (the first direction Z, the length direction of the second terminal, and the thickness direction X of the circuit board are perpendicular to each other) relative to the situation where the length direction of the welding portion 42111 intersects with the length direction Y of the second terminal member, thereby reducing the volume occupied by the connecting terminal 42 in the first direction Z, thereby facilitating the arrangement of multiple connecting terminals 42 along the first direction Z.

[0127] Please refer to Fig.11 and Fig.12 , Fig.11 for Fig.10 The cross-sectional view of AA in the figure, Fig.12 for Fig.11 Enlarged view of point C in the middle. According to some embodiments of the present application, along the thickness direction X of the circuit board, the side of the welding portion 42111 facing away from the circuit board 30 abuts against the housing 41 .

[0128] It can be understood that when the size of the soldering portion 42111 of the first terminal among the multiple connecting terminals 42 in the thickness direction X of the circuit board is constant, by abutting the side of the soldering portion 42111 facing away from the circuit board 30 with the shell 41, the side where the shell 41 abuts the soldering portion 42111 can be used as a reference, so that the side of the soldering portion 42111 used for soldering with the circuit board 30 is located on the same plane.

[0129] In some embodiments, please refer to Figure 11-Figure 12 In the length direction Y of the second terminal piece, the shell 41 has a first wall 411 away from the opening of the slot 41C, and the outer surface of the first wall 411 protrudes to form a first protrusion 411A. In the thickness direction X of the circuit board, the side of the first protrusion 411A facing the circuit board 30 abuts against the side of the welding portion 42111 away from the circuit board 30.

[0130] In this embodiment, along the thickness direction X of the circuit board, the side of the welding portion 42111 facing away from the circuit board 30 abuts against the shell 41, and then the welding portion 42111 of the first terminal piece 421 of the plurality of connecting terminals 42 is limited by the shell 41, and the tolerance of the first terminal piece 421 in the thickness direction of the circuit board 30 is absorbed by the elastic portion 4212, so that the first terminal piece 421 and the second terminal piece 422 are electrically connected, and at the same time, the welding portions 42111 of the plurality of connecting terminals 42 facing the circuit board 30 are all located on the same reference plane, thereby further reducing the risk of poor soldering between the connecting terminal 42 and the circuit board 30, thereby improving the reliability of the battery device 100.

[0131] Please refer to Fig.11 and Fig.13 , Fig.13 for Fig.11 Enlarged view of point D in the middle. According to some embodiments of the present application, the housing 41 has a first mounting hole 41A and a second mounting hole 41B, the second mounting hole 41B is connected to the first mounting hole 41A, the connecting portion 42112 is accommodated in the first mounting hole 41A, and a portion of the second terminal 422 is accommodated in the second mounting hole 41B.

[0132] The first mounting hole 41A and the second mounting hole 41B are two interconnected holes opened on the shell 41. Exemplarily, the first mounting hole 41A and the second mounting hole 41B can be set on the shell 41 by machining, or can be formed by integral molding with the shell 41.

[0133] It can be understood that the axis of the first mounting hole 41A should be parallel to the length direction of the connecting piece, and the axis of the second mounting hole 41B should be parallel to the length direction Y of the second terminal piece. Exemplarily, the axis of the first mounting hole 41A forms an angle with the axis of the second mounting hole 41B.

[0134] In some embodiments, please refer to Fig.11 and Fig.13 In the length direction Y of the second terminal piece, the housing 41 has a first wall 411 away from the opening of the slot 41C, the outer surface of the first wall 411 protrudes to form a first convex portion 411A, the inner surface of the first wall 411 is provided with a second mounting hole 41B, and the side of the first convex portion 411A facing the circuit board 30 is provided with a first mounting hole 41A. It can be understood that the first mounting hole 41A and the second mounting hole 41B are partially provided in the first convex portion 411A to reduce the weakening of the strength of the housing 41 by the first mounting hole 41A and the second mounting hole 41B, thereby improving the reliability of the first connector 40.

[0135] In an embodiment in which the first terminal member 421 has an elastic portion 4212, the elastic portion 4212 is located in the first mounting hole 41A and the second mounting hole 41B, so that the first mounting hole 41A and the second mounting hole 41B perform structural limitation and protection on the abutment between the elastic portion 4212 and the second terminal member 422, so as to improve the reliability of the connection between the elastic portion 4212 and the second terminal member 422.

[0136] In some embodiments, the connecting portion 42112 can be interference fit with the first mounting hole 41A, so that when the elastic portion 4212 is elastically deformed due to being driven by the second terminal member 422 to generate an elastic force on the connecting portion 42112 along the thickness direction X of the circuit board, the first mounting hole 41A can limit the connecting portion 42112 from moving away from the second terminal member 422 along the thickness direction X of the circuit board, thereby causing the risk that the welding portions 42111 of multiple connecting terminals 42 facing the circuit board 30 are not located on the same reference plane.

[0137] In some embodiments, a single-row limiting mechanism can also be provided in the first mounting hole 41A so that when the elastic portion 4212 is elastically deformed due to being driven by the second terminal member 422 to generate an elastic force on the connecting portion 42112 along the thickness direction X of the circuit board, the first mounting hole 41A can limit the connecting portion 42112 from moving away from the second terminal member 422 along the thickness direction X of the circuit board, thereby causing the risk that the welding portions 42111 of multiple connecting terminals 42 are not located on the same reference plane on the side facing the circuit board 30.

[0138] In some embodiments, the second terminal member 422 can be interference fit with the second mounting hole 41B, so that when the elastic portion 4212 is elastically deformed due to being driven by the second terminal member 422 to generate an elastic force on the second terminal member 422 along the length direction Y of the second terminal member, the second mounting hole 41B can limit the second terminal member 422 from moving away from the first terminal member 421 along the length direction Y of the second terminal member, thereby causing the risk of the connecting terminal 42 being short-circuited.

[0139] In this embodiment, the second mounting hole 41B is connected to the first mounting hole 41A, the connecting portion 42112 is accommodated in the first mounting hole 41A, and a portion of the second terminal member 422 is accommodated in the second mounting hole 41B, so that the abutment between the elastic portion 4212 and the second terminal member 422 is located in the first mounting hole 41A and the second mounting hole 41B, and then the first mounting hole 41A and the second mounting hole 41B provide structural protection for the elastic portion 4212, reducing the risk of the remaining structural members of the battery device 100 extending into between the elastic portion 4212 and the second terminal member 422, resulting in failure of the electrical connection between the first terminal member 421 and the second terminal member 422, thereby improving the reliability of the battery device 100.

[0140] Please refer to Fig.11 and Fig.13 , and please refer to Fig.14 , Fig.14 Another structural diagram of the first mounting hole 41A provided in some embodiments of the present application. According to some embodiments of the present application, a limiting protrusion 42112A is formed on the outer surface of the connecting portion 42112, and the limiting protrusion 42112A is interference-fitted with the first mounting hole 41A.

[0141] The limiting protrusion 42112A is a protrusion formed by protruding from the outer peripheral side of the connecting portion 42112.

[0142] It can be understood that compared with the situation where the entire connecting portion 42112 is interference fit with the first mounting hole 41A, the interference fit between the limiting portion and the first mounting hole 41A reduces the deformation of the first mounting hole 41A and reduces the risk of the hole wall of the first mounting hole 41A being crushed.

[0143] Exemplarily, the limiting protrusion 42112A can be configured to be disposed on two opposite sides of the connecting portion 42112 in a direction perpendicular to the thickness direction X of the circuit board; the limiting protrusion 42112A can also be configured to be disposed around the outer surface of the connecting portion 42112 and connected end to end.

[0144] In some embodiments, please refer to Fig.13A first guide surface 42112B is provided on the side of the limiting protrusion 42112A close to the second terminal piece 422 in the thickness direction X of the circuit board. Along the direction away from the second terminal piece 422, the first guide surface 42112B is inclined in the direction away from the connecting portion 42112. Therefore, when the limiting protrusion 42112A enters the first mounting hole 41A, the first guide surface 42112B of the limiting protrusion 42112A can guide the hole wall of the first mounting hole 41A to elastically deform in the direction away from the connecting portion 42112, thereby facilitating the connecting portion 42112 to be inserted into the first mounting hole 41A. A first stop surface 42112C is provided on the side of the limiting protrusion 42112A away from the second terminal piece 422 in the thickness direction X of the circuit board. The first stop surface 42112C is parallel to the circuit board 30, so that when the elastic portion 4212 is elastically deformed due to being driven by the second terminal piece 422 to generate an elastic force on the connecting portion 42112 along the thickness direction X of the circuit board, the first stop surface 42112C can cooperate with the hole wall of the first mounting hole 41A to limit the connecting portion 42112 from moving away from the second terminal piece 422 along the thickness direction X of the circuit board, thereby causing the risk that the side of the welding portion 42111 of multiple connecting terminals 42 facing the circuit board 30 is not located on the same reference plane.

[0145] In some embodiments, please refer to Fig.14 The hole wall of the first mounting hole 41A protrudes to form a third protrusion 41D. The third protrusion 41D is provided with a second guide surface 41E on the side of the third protrusion 41D close to the circuit board 30 in the thickness direction X of the circuit board. In the direction away from the circuit board 30, the second guide surface 41E is inclined toward the direction close to the connecting portion 42112, so that when the limiting protrusion 42112A enters the first mounting hole 41A, the second guide surface 41E can guide the hole wall provided with the first mounting hole 41A to elastically deform in the direction away from the connecting portion 42112, thereby facilitating the connection portion 42112 to be inserted into the first mounting hole 41A. The third protrusion 41D is provided with a second stop surface 41F on the side of the third protrusion 41D away from the circuit board 30 in the thickness direction X of the circuit board. The second stop surface 41F is parallel to the circuit board 30, so that when the elastic portion 4212 is elastically deformed due to being driven by the second terminal piece 422 to generate an elastic force on the connecting portion 42112 along the thickness direction X of the circuit board, the second stop surface 41F can abut against the first stop surface 42112C along the thickness direction X of the circuit board to limit the connecting portion 42112 from moving away from the second terminal piece 422 along the thickness direction X of the circuit board, thereby causing the risk that the side of the welding portion 42111 of the plurality of connecting terminals 42 facing the circuit board 30 is not located on the same reference plane.

[0146] In some embodiments, there are multiple limiting protrusions 42112A arranged at intervals along the thickness direction X of the circuit board.

[0147] In this embodiment, the limiting protrusion 42112A is interference fit with the second mounting hole 41B, so that the connecting portion 42112 can be relatively fixed in the axial direction of the second mounting hole 41B relative to the second mounting hole 41B, thereby limiting the axial movement of the connecting portion 42112 in the second mounting hole 41B due to the elastic force generated after the elastic portion 4212 and the second terminal member 422 abut, thereby reducing the risk of the welding portions 42111 of multiple connecting terminals 42 facing the circuit board 30 not being located on the same reference plane due to the axial movement of the connecting portion 42112 in the second mounting hole 41B, thereby further reducing the risk of poor soldering between the connecting terminals 42 and the circuit board 30, thereby improving the reliability of the battery device 100.

[0148] Please refer to Fig.15 , Fig.15 for Fig.10 Enlarged view of point B in the middle. According to some embodiments of the present application, a plurality of first terminal members 421 are arranged at intervals along a first direction Z, a plurality of barrier portions 411C are convexly provided on the outer surface of the housing 41, and the barrier portion 411C is located between two adjacent first terminal members 421, and the first direction Z is perpendicular to the thickness direction X of the circuit board.

[0149] The barrier portion 411C is a structural member of the housing 41 for separating the portion of the connecting terminal 42 located outside the housing 41. Exemplarily, the barrier portion 411C is disposed between the welding portions 42111 of two adjacent first terminal members 421.

[0150] In some embodiments, the first protrusion 411A protrudes from the surface of the back shell 41 in the length direction Y of the second terminal piece to form a barrier portion 411C, the welding portion 42111 has a portion protruding from the first protrusion 411A along the length direction Y of the second terminal piece, and the barrier portion 411C is arranged between the welding portions 42111 of two adjacent first terminal pieces 421.

[0151] In this embodiment, the barrier portion 411C is located between two adjacent first terminal members 421 , thereby reducing the risk of the two adjacent first terminal members 421 abutting against each other in the first direction Z and causing an internal short circuit in the battery device 100 .

[0152] Please refer to Fig.16 , Fig.16A schematic diagram of the structure of the first connection terminal 42A and the second connection terminal 42B provided for some embodiments of the present application. According to some embodiments of the present application, the plurality of connection terminals 42 include a plurality of first connection terminals 42A and a plurality of second connection terminals 42B, the first connection terminals 42A and the second connection terminals 42B are alternately arranged along a first direction Z, the second terminal members 422 of the plurality of first connection terminals 42A are arranged in one row, the second terminal members 422 of the plurality of second connection terminals 42B are arranged in another row, the two rows of second terminal members 422 are arranged at intervals along the thickness direction X of the circuit board, and the first direction Z is perpendicular to the thickness direction X of the circuit board.

[0153] The first direction Z is perpendicular to the thickness direction X of the circuit board and is at an angle to the length direction Y of the second terminal. Exemplarily, the first direction Z, the thickness direction X of the circuit board, and the length direction Y of the second terminal are perpendicular to each other.

[0154] In some embodiments, the second terminal member 422 abuts against the first terminal member 421 on the side facing each other in the first direction Z or in the length direction Y of the second terminal member, the first terminal member 421 of the first connecting terminal 42A and the first terminal member 421 of the second connecting terminal 42B have the same structure, and the abutment between the second terminal member 422 of the first connecting terminal 42A and the first terminal member 421 of the first connecting terminal 42A is located between the abutment between the second terminal member 422 of the second connecting terminal 42B and the first terminal of the second connecting terminal 42B and the circuit board 30.

[0155] In this embodiment, the second terminal pieces 422 of the plurality of first connecting terminals 42A are arranged in one row, and the second terminal pieces 422 of the plurality of second connecting terminals 42B are arranged in another row, and the two rows of second terminal pieces 422 are spaced apart along the thickness direction X of the circuit board, so that the second terminal pieces 422 of the plurality of connecting terminals 42 make full use of the space of the connector in the thickness direction X of the circuit board, thereby reducing the size of the connecting pieces in the first direction Z compared to the situation in which the second terminal pieces 422 of the plurality of connecting terminals 42 are spaced apart in a row along the first direction Z.

[0156] Please refer to Fig.16 , and please refer to Fig.17 , Fig.17 A cross-sectional view of a first connector 40 provided for some embodiments of the present application. According to some embodiments of the present application, the first terminal member 421 abuts against the second terminal member 422 along the thickness direction X of the circuit board; in the thickness direction X of the circuit board, the size of the first terminal member 421 of the first connection terminal 42A is not equal to the size of the first terminal member 421 of the second connection terminal 42B.

[0157] In the thickness direction X of the circuit board, the size of the first terminal piece 421 of the first connecting terminal 42A is not equal to the size of the first terminal piece 421 of the second connecting terminal 42B. It can be understood that the size of the first terminal piece 421 of the first connecting terminal 42A is smaller than the size of the first terminal piece 421 of the second connecting terminal 42B; it can also be understood that the size of the first terminal piece 421 of the first connecting terminal 42A is larger than the size of the first terminal piece 421 of the second connecting terminal 42B.

[0158] In some embodiments, please refer to Fig.16 The second terminal member 422 abuts against the first terminal member 421 on the sides facing each other in the thickness direction X of the circuit board. In the thickness direction X of the circuit board, the size of the first terminal member 421 of the first connecting terminal 42A is smaller than the size of the first terminal member 421 of the second connecting terminal 42B, so that the abutment between the second terminal member 422 of the first connecting terminal 42A and the first terminal member 421 of the first connecting terminal 42A is located between the abutment between the second terminal member 422 of the second connecting terminal 42B and the first terminal of the second connecting terminal 42B and the circuit board 30.

[0159] In some embodiments, please refer to Fig.16 , in the thickness direction X of the circuit board, the size of the connecting portion 42112 of the first connecting terminal 42A is not equal to the size of the connecting portion 42112 of the second connecting terminal 42B.

[0160] In some embodiments, please refer to Fig.11 and 17, in the length direction Y of the second terminal piece, the housing 41 has a first wall 411 away from the opening of the slot 41C, the outer surface of the first wall 411 protrudes to form a first convex portion 411A and a second convex portion 411B, along the thickness direction X of the circuit board, the first convex portion 411A is located between the second convex portion 411B and the circuit board 30, and a second mounting hole 41B is provided on the inner surface of the first wall 411, and a portion of the second mounting hole 41B through which the second terminal piece 422 of the first connection terminal 42A passes is located in the first convex portion 411A, and a portion of the second mounting hole 41B through which the second terminal piece 422 of the second connection terminal 42B passes is located in the second convex portion 411B. The first mounting hole 41A is provided on the side of the first convex portion 411A facing the circuit board 30. The first mounting hole 41A through which the first terminal piece 421 of the first connection terminal 42A passes is connected to the second mounting hole 41B through which the second terminal piece 422 of the first connection terminal 42A passes. The first mounting hole 41A through which the first terminal piece 421 of the second connection terminal 42B passes passes through the first convex portion 411A and extends to the second convex portion 411B to communicate with the second mounting hole 41B through which the second terminal piece 422 of the second connection terminal 42B passes. Thus, the first mounting hole 41A through which the first terminal piece 421 of the second connection terminal 42B passes is divided into a portion located in the first convex portion 411A and a portion located in the second convex portion 411B. This facilitates separate processing, reducing the processing difficulty of the housing 41.

[0161] In this embodiment, in the thickness direction X of the circuit board, the size of the first terminal piece 421 of the first connecting terminal 42A is not equal to the size of the first terminal piece 421 of the second connecting terminal 42B, so that the first terminal piece 421 of the first connecting terminal 42A and the first terminal piece 421 of the second connecting terminal 42B are convenient for respectively abutting against the two rows of second terminal pieces 422 spaced apart along the thickness direction X of the circuit board, and the structure is simple and easy to implement.

[0162] Please refer to Fig.18 , Fig.18 Another structural exploded view of the first connector 40 provided in some embodiments of the present application. According to some embodiments of the present application, the first connector 40 further includes a fixing member 43 , which is connected to the housing 41 and is welded to the circuit board 30 .

[0163] The fixing member 43 is a structural member for connecting the circuit board 30 and the housing 41. Exemplarily, the fixing member 43 may be made of a metal material so that the fixing member 43 has a certain structural strength and reduces the risk of deformation of the fixing member 43.

[0164] In some embodiments, please refer to Fig.18The shell 41 has a plug hole 41G that penetrates the shell 41 along the thickness direction of the circuit board 30 , and the fixing member 43 is inserted into the plug hole 41G and welded to the circuit board 30 .

[0165] In this embodiment, the fixing member 43 is connected to the shell 41, and the fixing member 43 is welded to the circuit board 30, so that the movement of the shell 41 relative to the circuit board 30 is limited by the fixing member 43, thereby reducing the risk of failure of the connection between the first terminal 421 and the circuit board 30 due to the movement of the shell 41 relative to the circuit board 30 due to external force, thereby improving the reliability of the battery device 100.

[0166] Please refer to Fig.18 According to some embodiments of the present application, a plurality of first terminal members 421 are arranged at intervals along the first direction Z, two fixing members 43 are provided, and the two fixing members 43 are respectively located at two ends of the shell 41 along the first direction Z.

[0167] In this embodiment, the two fixing members 43 are respectively located at the two ends of the shell 41 along the first direction Z, so that the supporting force of the fixing members 43 on the shell 41 is more uniform, thereby further reducing the risk of failure of the connection between the first terminal member 421 and the circuit board 30 due to the movement of the shell 41 relative to the circuit board 30 due to external force, thereby improving the reliability of the battery device 100.

[0168] Please refer to Fig.18 According to some embodiments of the present application, a positioning column 44 is formed on the housing 41 , a positioning hole 31 is formed on the circuit board 30 , and the positioning column 44 cooperates with the positioning hole 31 .

[0169] The positioning post 44 is a structural member for limiting the relative movement between the circuit board 30 and the housing 41. Exemplarily, the positioning post 44 can be made of a metal material so that the positioning post 44 has a certain structural strength and reduces the risk of deformation of the positioning post 44.

[0170] In some embodiments, the positioning post 44 can be welded to the circuit board 30 after being matched with the positioning hole 31 .

[0171] In this embodiment, a positioning column 44 is formed on the shell 41, and a positioning hole 31 is formed on the circuit board 30. The positioning column 44 cooperates with the positioning hole 31. On the one hand, during assembly, the first connector 40 can be conveniently positioned by the positioning column 44 and the positioning hole 31, thereby facilitating the assembly of the battery device 100; on the other hand, the positioning column 44 cooperates with the positioning hole 31, so that the movement of the shell 41 relative to the circuit board 30 in a direction parallel to the circuit board 30 is limited by the positioning column 44, thereby reducing the risk of failure of the connection between the first terminal 421 and the circuit board 30 due to the movement of the shell 41 relative to the circuit board 30 due to external force, thereby improving the reliability of the battery device 100.

[0172] Please refer to Figure 3 According to some embodiments of the present application, the battery device 100 also includes a plurality of battery cells 20, a busbar 21 and a sampling assembly 60; the sampling assembly 60 includes a second connector 50 and a sampling wire, and the second connector 50 is plugged into the first connector 40; the sampling wire has a sampling end and a connecting end, the sampling end is connected to the busbar 21 or the battery cell 20, and the connecting end is connected to the second connector 50.

[0173] The battery cell 20 may include a lithium-ion secondary battery cell 20, a lithium-ion primary battery cell 20, a lithium-sulfur battery cell 20, a sodium-lithium-ion battery cell 20, a sodium-ion battery cell 20, or a magnesium-ion battery cell 20, etc., which is not limited in the embodiments of the present application. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes, etc., which is not limited in the embodiments of the present application. The battery cell 20 is generally divided into three types according to the packaging method: cylindrical battery cells 20, square battery cells 20, and soft-pack battery cells 20, which is not limited in the embodiments of the present application.

[0174] The busbar 21 is a component that can connect multiple battery cells 20 in series or in parallel to achieve electrical connection between the multiple battery cells 20. The busbar 21 can also be called a busbar, a bar or a busbar, which is generally a metal sheet that can be welded to the electrode terminals of the battery cell 20 to connect multiple battery cells 20 in series or in parallel.

[0175] The sampling wire is a component used to collect electrical data of the sampled component. The sampling wire can be used to collect the voltage and / or temperature of the battery cell 20. The sampling wire can be a copper wire, an aluminum wire, a silver wire, or an alloy wire.

[0176] In some embodiments, the second connector 50 includes a conductive terminal having an insertion hole for inserting the second terminal member 422. There are multiple options for the shape of the insertion hole, such as a circular hole, a triangular hole, a rectangular hole, an elliptical hole, etc. The shape of the insertion hole can be selected according to actual needs. The shape of the insertion hole can also be selected according to the shape of the second terminal member 422, such as the second terminal member 422 is cylindrical and the insertion hole can be a circular hole. Of course, the shapes of the insertion hole and the second terminal member 422 can also be different, for example, the second terminal member 422 is cylindrical and the insertion hole can be a triangular hole.

[0177] The conductive terminal may be made of a conductive material, such as aluminum, copper, etc. The connecting end is connected to the conductive terminal to electrically connect the sampling wire and the circuit board 30 .

[0178] In this embodiment, the sampling wire and the first connector can be quickly connected via the second connector 50 , thereby facilitating the electrical connection between the sampling assembly 60 and the circuit board 30 , which is beneficial to simplifying the installation of the battery device 100 .

[0179] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery device 100 of any of the above schemes, and the battery device 100 is used to provide electrical energy to the electrical device.

[0180] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 .

[0181] According to some embodiments of this application, please refer to Figure 3-Figure 18, the embodiment of the present application provides a battery device 100 including a circuit board 30 and a first connector 40; the first connector 40 is mounted on the circuit board 30, the first connector 40 includes a housing 41 and a plurality of connection terminals 42, the housing 41 is made of insulating material, and the plurality of connection terminals 42 are connected to the housing 41 and isolated from each other by the housing 41; wherein each connection terminal 42 includes a first terminal piece 421 and a second terminal piece 422 formed separately, the first terminal piece 421 is welded to the circuit board 30, and the second terminal piece 422 is electrically connected to the first terminal piece 421 and the sampling component 60. The first terminal piece 421 is bent, and the second terminal piece 422 is straight. The length direction Y of the second terminal piece intersects with the thickness direction X of the circuit board. The first terminal piece 421 abuts against the second terminal piece 422. The first terminal piece 421 includes a main body 4211 and an elastic part 4212, the main body 4211 is welded to the circuit board 30, and the elastic part 4212 abuts against the second terminal piece 422. The elastic part 4212 is a cantilever structure with one end connected to the main body 4211. The main body 4211 includes a welding part 42111 and a connecting part 42112. The welding part 42111 is welded to the circuit board 30. The length direction of the welding part 42111 is perpendicular to the thickness direction X of the circuit board. One end of the connecting part 42112 is connected to the welding part 42111, and the elastic part 4212 is arranged at the other end of the connecting part 42112. The length direction of the welding part 42111 is parallel to the length direction Y of the second terminal member. Along the thickness direction X of the circuit board, the side of the welding part 42111 facing away from the circuit board 30 abuts against the housing 41. The housing 41 has a first mounting hole 41A and a second mounting hole 41B. The second mounting hole 41B is connected to the first mounting hole 41A. The connecting part 42112 is accommodated in the first mounting hole 41A, and a part of the second terminal member 422 is accommodated in the second mounting hole 41B. The outer surface of the connecting portion 42112 forms a limited position protrusion 42112A, and the limited position protrusion 42112A is interference fit with the first mounting hole 41A. A plurality of first terminal pieces 421 are arranged at intervals along the first direction Z, and a plurality of barrier pieces 411C are convexly provided on the outer surface of the housing 41, and the barrier pieces 411C are located between two adjacent first terminal pieces 421, and the first direction Z is perpendicular to the thickness direction X of the circuit board. The plurality of connecting terminals 42 include a plurality of first connecting terminals 42A and a plurality of second connecting terminals 42B, and the first connecting terminals 42A and the second connecting terminals 42B are alternately arranged along the first direction Z, and the second terminal pieces 422 of the plurality of first connecting terminals 42A are arranged in one row, and the second terminal pieces 422 of the plurality of second connecting terminals 42B are arranged in another row, and the two rows of second terminal pieces 422 are arranged at intervals along the thickness direction X of the circuit board, and the first direction Z is perpendicular to the thickness direction X of the circuit board. In the thickness direction X of the circuit board, the size of the first terminal piece 421 of the first connection terminal 42A is not equal to the size of the first terminal piece 421 of the second connection terminal 42B.The first connector 40 also includes a fixing member 43, which is connected to the housing 41 and welded to the circuit board 30. A plurality of first terminal members 421 are arranged at intervals along the first direction Z, and two fixing members 43 are provided, and the two fixing members 43 are respectively located at both ends of the housing 41 along the first direction Z. A positioning column 44 is formed on the housing 41, and a positioning hole 31 is formed on the circuit board 30, and the positioning column 44 cooperates with the positioning hole 31. The battery device also includes a plurality of battery cells 20, a busbar 21 and a sampling assembly 60; the sampling assembly 60 includes a second connector 50 and a sampling wire, the second connector 50 is plugged into the first connector 40, and the second connector 50 includes a plurality of conductive terminals; the sampling wire has a sampling end and a connecting end, the sampling end is connected to the busbar 21 or the battery cell 20, and the connecting end is connected to the second connector 50.

[0182] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0183] The above embodiments are only used to illustrate the technical solutions of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Circuit boards; A first connector, mounted on the circuit board, comprising a housing and a plurality of connection terminals, the housing being made of insulating material, the plurality of connection terminals being connected to the housing and isolated from each other by the housing; Each of the connecting terminals includes a first terminal member and a second terminal member that are separately formed, the first terminal member is welded to the circuit board, and the second terminal member is used to electrically connect the first terminal member and the sampling component.

2. The battery device according to claim 1, characterized in that: The first terminal piece is bent, and the second terminal piece is straight.

3. The battery device according to claim 2, characterized in that: The length direction of the second terminal member intersects with the thickness direction of the circuit board.

4. The battery device according to claim 1, characterized in that: The first terminal member abuts against the second terminal member.

5. The battery device according to claim 4, characterized in that: The first terminal member includes a main body and an elastic portion, the main body is welded to the circuit board, and the elastic portion abuts against the second terminal member.

6. The battery device according to claim 5, characterized in that: The elastic part is a cantilever structure with one end connected to the main body.

7. The battery device according to claim 5, characterized in that: The main body includes a welding part and a connecting part, the welding part is welded to the circuit board, the connecting part and the welding part are arranged at an angle, one end of the connecting part is connected to the welding part, and the elastic part is arranged at the other end of the connecting part.

8. The battery device according to claim 7, characterized in that: The length direction of the welding portion is perpendicular to the thickness direction of the circuit board, and the length direction of the connecting portion is parallel to the thickness direction of the circuit board.

9. The battery device according to claim 8, characterized in that: A length direction of the welding portion is parallel to a length direction of the second terminal member.

10. The battery device according to claim 7, characterized in that: Along the thickness direction of the circuit board, a side of the welding portion facing away from the circuit board abuts against the housing.

11. The battery device according to claim 7, characterized in that: The housing has a first mounting hole and a second mounting hole, the second mounting hole is communicated with the first mounting hole, the connecting portion is accommodated in the first mounting hole, and a part of the second terminal piece is accommodated in the second mounting hole.

12. The battery device according to claim 11, characterized in that: A limiting protrusion is formed on the outer surface of the connecting portion, and the limiting protrusion is interference-fitted with the first mounting hole.

13. The battery device according to claim 1, characterized in that: A plurality of the first terminal members are arranged at intervals along a first direction, a plurality of barrier portions are protruding from the outer surface of the shell, and the barrier portions are located between two adjacent first terminal members, and the first direction is perpendicular to the thickness direction of the circuit board.

14. The battery device according to claim 1, characterized in that: The multiple connecting terminals include multiple first connecting terminals and multiple second connecting terminals, the first connecting terminals and the second connecting terminals are alternately arranged along a first direction, the second terminal pieces of the multiple first connecting terminals are arranged in one row, and the second terminal pieces of the multiple second connecting terminals are arranged in another row, and the two rows of second terminal pieces are spaced apart along the thickness direction of the circuit board, and the first direction is perpendicular to the thickness direction of the circuit board.

15. The battery device according to claim 14, characterized in that: The first terminal member abuts against the second terminal member along the thickness direction of the circuit board; In the thickness direction of the circuit board, the size of the first terminal piece of the first connection terminal is not equal to the size of the first terminal piece of the second connection terminal.

16. The battery device according to claim 1, characterized in that: The first connector also includes a fixing member, which is connected to the housing and is welded to the circuit board.

17. The battery device according to claim 16, characterized in that: A plurality of the first terminal members are arranged at intervals along a first direction, two fixing members are provided, and the two fixing members are respectively located at two ends of the housing along the first direction.

18. The battery device according to claim 1, characterized in that A positioning column is formed on the housing, a positioning hole is formed on the circuit board, and the positioning column matches with the positioning hole.

19. The battery device according to claim 1, characterized in that: The battery device further comprises: Multiple battery cells; A busbar, used to realize electrical connection of a plurality of battery cells; The sampling assembly comprises: A second connector, plugged into the first connector; The sampling wire has a sampling end and a connecting end, wherein the sampling end is connected to the busbar or the battery cell, and the connecting end is connected to the second connector.

20. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1 to 19, the battery device is used to provide electrical energy.

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