Battery device, power utilization device and flexible circuit board

Abstract

The utility model discloses a battery device, an electric device and a flexible circuit board, and relates to the technical field of batteries, the battery device comprises at least one battery monomer, a flexible circuit board, a connector and a battery management system. The flexible circuit board comprises a circuit board body and a connecting part, the connecting part is connected with the circuit board body, and at least part of the connecting part is arranged on one side of the circuit board body in the width direction of the flexible circuit board; the circuit board body is connected with the battery cells to collect signals; the circuit board body is provided with at least one folding part, and the folding part is configured to extend the length of the circuit board body along the length direction of the flexible circuit board after being folded; the connecting part is inserted or crimped with the connector; and the connector is connected with the battery management system.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device, an electrical device and a flexible circuit board. Background Art

[0002] As environmental pollution becomes increasingly serious, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development.

[0003] In the development of battery technology, the production cost of batteries is an issue that cannot be ignored. How to reduce the production cost of batteries is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, an electrical device and a flexible circuit board, aiming to reduce the production cost of the flexible circuit board, thereby reducing the production cost of the battery device.

[0005] The present application provides a battery device, comprising at least one battery cell, a flexible circuit board, a connector and a battery management system, wherein the flexible circuit board comprises a circuit board body and a connecting portion, wherein the connecting portion is connected to the circuit board body, and at least part of the connecting portion is arranged on one side of the circuit board body along the width direction of the flexible circuit board; the circuit board body is connected to the battery cell to collect signals; the circuit board body has at least one folding portion, and the folding portion is configured to be able to extend along the length direction of the flexible circuit board to extend the length of the circuit board body; the connecting portion is plugged or crimped with the connector; and the connector is connected to the battery management system.

[0006] In the technical solution of the embodiment of the present application, the flexible circuit board includes a circuit board body and a connecting portion. At least part of the connecting portion is arranged on one side of the circuit board body along the width direction of the flexible circuit board, so that the connecting portion extends beyond the circuit board body along the width direction of the flexible circuit board, and the connecting portion occupies a certain space along the width direction of the flexible circuit board; and the circuit board body has at least one folding portion, and the folding portion is configured to be able to extend the length of the circuit board body along the length direction of the flexible circuit board after being folded. With such a setting, the circuit board body can be unfolded after being folded by the folding portion, and the length direction of the connecting portion changes with the unfolding of the circuit board body. After the circuit board body is unfolded, the length direction of the connecting portion can be the same as the length direction of the flexible circuit board, that is, the flexible circuit board of the present application is in a folded state after assembly and in an unfolded state before assembly and before cutting. The flexible circuit board is cut in the arrangement mode of the unfolded state, which can reduce the occupied space of the connecting portion in the width direction of the cutting material, increase the number of flexible circuit boards cut by the cutting material, reduce the waste of the cutting material, improve the utilization rate of the cutting material, and thus reduce the production cost of the flexible circuit board. Moreover, the connecting portion is inserted or crimped with the connector, which is beneficial to simplifying the assembly process of the connecting portion and the connector and improving the assembly efficiency of the battery device. It can be seen that the technical solution of the present application can reduce the production cost of the battery device.

[0007] In some embodiments, the flexible circuit board includes a plurality of the connecting portions, and the plurality of the connecting portions are arranged at intervals in sequence along the width direction of the flexible circuit board. In this embodiment, the plurality of connecting portions of the flexible circuit board after assembly are arranged at intervals in sequence along the width direction of the flexible circuit board and occupy a certain space, and the flexible circuit board is in an unfolded state before assembly, that is, the flexible circuit board is cut in the arrangement mode of the unfolded state, and a plurality of connecting portions can be cut along the length direction of the flexible circuit board, and then are arranged at intervals along the width direction of the flexible circuit board after being folded by the folding portion of the circuit board body. In this way, the occupied space of the plurality of connecting portions in the width direction of the cutting material can be reduced, the waste of the cutting material can be reduced, the utilization rate of the cutting material can be improved, and the production cost of the flexible circuit board can be reduced.

[0008] In some embodiments, the connecting portion is arranged at one end of the circuit board body along its length direction. The connector includes a connecting base and connecting terminals arranged on the connecting base. The connecting base has a plug-in slot, and the connecting portion is inserted into the plug-in slot and connected to the connecting terminals. In this embodiment, the circuit board body and the connecting portion are arranged along the length direction of the flexible circuit board, which is beneficial to reducing the space occupied by the connecting portion in the width direction of the flexible circuit board. Moreover, a plug-in slot is arranged on the connecting base of the connector, which is convenient for the connecting portion located at one end of the flexible circuit board to be inserted into the connector. The assembly process of the insertion is simple, which is beneficial to improving the assembly efficiency.

[0009] In some embodiments, the connecting portion includes a first insertion arm, a bending portion, and a second insertion arm that are sequentially connected. The first insertion arm is connected to the circuit board body. Along the thickness direction of the flexible circuit board, at least a part of the projection of the first insertion arm falls on the second insertion arm. The connection base has at least two insertion slots, and the first insertion arm and the second insertion arm are respectively inserted into one of the insertion slots. With such a setting, the space in the thickness direction of the flexible circuit board can be fully utilized to improve the structural compactness of the connection between the connecting portion and the connector. Moreover, the first insertion arm and the second insertion arm are respectively connected to the connection terminals of the connector, so that multiple signals can be output, thereby improving the electrical performance of the flexible circuit board.

[0010] In some embodiments, the connector includes connection terminals. The connection terminals include a terminal body and a crimping portion. The crimping portion is connected to the terminal body and encloses a crimping groove. The connecting portion is inserted into the crimping groove, and the crimping portion is crimped on the connecting portion. In this embodiment, by providing a crimping groove on the connection terminal, it is convenient for the connecting portion to be inserted and positioned. And the crimping portion is crimped on the connecting portion. Compared with the welding solution, this solution is beneficial to improving the assembly efficiency, reducing the labor cost, and the crimping method reduces the risk of detachment and improves the connection stability.

[0011] In some embodiments, the crimping portion includes a crimping section and a tip section. The terminal body, the crimping section, and the tip section are sequentially connected and enclose the crimping groove. The tip section pierces and crimps on the connecting portion. In this embodiment, the flexible circuit board has a soft texture. The tip section pierces the connecting portion and is crimped and fixed to the connecting portion, thus improving the connection stability between the connecting portion and the connection terminal and further reducing the risk of the connecting portion falling off.

[0012] In some embodiments, the terminal body has a first edge and a second edge that are oppositely arranged along its width direction, and at least one of the crimping portions is provided on each of the first edge and the second edge. With such a setting, it is beneficial to strengthen the connection effect between the connecting portion and the connection terminal and improve the connection stability.

[0013] In some embodiments, the circuit board body includes a first flexible section and a second flexible section. The first flexible section and the second flexible section are connected by at least one of the folding portions. The first flexible section extends along the length direction of the flexible circuit board, and the length direction of the second flexible section intersects with the length direction of the first flexible section. Part of the second flexible section is stacked on the first flexible section. In this embodiment, the length extension directions of the first flexible section and the second flexible section are different, that is, the flexible circuit board is folded at least once during assembly. After the flexible circuit board is assembled, part of the second flexible section is stacked on the first flexible section. By folding the folding portion, the circuit board body can be unfolded, thereby extending the length of the circuit board body. The connecting portion can be arranged on the second flexible section. When the circuit board body is unfolded, the length direction of the connecting portion can be the same as the length direction of the flexible circuit board, so as to reduce the occupied space of the connecting portion in the width direction of the cutting material, and further reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board.

[0014] In some embodiments, the circuit board body further includes a third flexible section. The third flexible section and the second flexible section are connected by at least one of the folding portions. The length direction of the third flexible section intersects with the length direction of the first flexible section. At least part of the third flexible section is stacked on the second flexible section. In this embodiment, the length extension directions of the third flexible section and the first flexible section are different, that is, the flexible circuit board is folded at least twice during assembly. After the flexible circuit board is assembled, at least part of the third flexible section is stacked on the second flexible section. Through the double folding of the flexible circuit board, the electrical connection positions in the connecting portion on the flexible circuit board are in the same orientation before and after folding, which is beneficial to ensuring the electrical performance of the flexible circuit board. Moreover, by folding the first flexible section, the second flexible section, and the third flexible section through the folding portion, the circuit board body can be unfolded, thereby extending the length of the circuit board body. When the circuit board body is unfolded, the length direction of the connecting portion can be the same as the length direction of the flexible circuit board, so as to reduce the occupied space of the connecting portion in the width direction of the cutting material, and further reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board.

[0015] In some embodiments, the second flexible section has a first stacking surface stacked with the first flexible section and a second stacking surface stacked with the third flexible section. The first stacking surface and the second stacking surface are arranged back to back on the second flexible section. With such an arrangement, that is, the third flexible section folds toward the side away from the first flexible section, which is convenient for the folding and assembly of the flexible circuit board. At the same time, the third flexible section and the first flexible section do not interfere with each other, making the structural arrangement of the folded flexible circuit board smooth.

[0016] In some embodiments, along the length direction of the flexible circuit board, the connecting portion is provided at one end of the third flexible segment away from the first flexible segment. With such an arrangement, when the circuit board body is unfolded, the length direction of the connecting portion can be the same as the length direction of the flexible circuit board, so as to reduce the occupied space of the connecting portion in the width direction of the cutting material, thereby reducing the waste of the cutting material, improving the utilization rate of the cutting material, and reducing the production cost of the flexible circuit board.

[0017] In some embodiments, a colloid is provided at the stacking portion of the first flexible segment and the second flexible segment, and the colloid bonds the first flexible segment and the second flexible segment; and / or, a colloid is provided at the stacking portion of the second flexible segment and the third flexible segment, and the colloid bonds the second flexible segment and the third flexible segment. With such an arrangement, by bonding the stacking portion of the first flexible segment and the second flexible segment with the colloid, and / or by bonding the stacking portion of the second flexible segment and the third flexible segment with the colloid, it is convenient to shape the folded circuit board body and ensure the stability of the flexible circuit board after folding and assembling.

[0018] In some embodiments, a support member is provided at the stacking portion of the first flexible segment and the second flexible segment, and the colloid is respectively provided on the surface of the support member facing the first flexible segment and the surface facing the second flexible segment; and / or, a support member is provided at the stacking portion of the second flexible segment and the third flexible segment, and the colloid is respectively provided on the surface of the support member facing the second flexible segment and the surface facing the third flexible segment. In this embodiment, the support member can provide certain support to the stacking portion of the first flexible segment and the second flexible segment, appropriately increase the gap between the first flexible segment and the second flexible segment, buffer the commutation angle between the two, and reduce the possibility of breakage due to large-angle commutation of the folding portion. Similarly, the support member can provide certain support to the stacking portion of the second flexible segment and the third flexible segment, appropriately increase the gap between the second flexible segment and the third flexible segment, buffer the commutation angle between the two, and reduce the possibility of breakage due to large-angle commutation of the folding portion. Moreover, by providing the colloid on the surface of the support member, the gluing operation is simple, which is beneficial to simplifying the assembly process.

[0019] In some embodiments, the support member is configured to be capable of generating compressive deformation along the thickness direction of the flexible circuit board. After the support member is assembled, its size along the thickness direction can be compressed by extruding the support member, thereby reducing the size of the folding portion in the thickness direction of the flexible circuit board and reducing the possibility of structural interference between the flexible circuit board and the battery box. During the battery assembly process, even if there is a certain contact between the folding portion and the battery box, the influence of the battery box on the internal circuit of the folding portion can be reduced through the compressive deformation of the support member.

[0020] The present application also provides a battery device, which includes at least one battery cell, a flexible circuit board, and a battery management system. The flexible circuit board includes a circuit board body and a connecting portion. The connecting portion is connected to the circuit board body, and at least part of the connecting portion is disposed on one side of the circuit board body along the width direction of the flexible circuit board. The circuit board body is connected to the battery cell to collect signals. The circuit board body has at least one folding portion, and the folding portion is configured to be able to extend along the length direction of the circuit board body to extend the length of the circuit board body. The battery management system includes a battery management circuit board, and the battery management circuit board has a welding portion, and the connecting portion is welded to the welding portion.

[0021] In the technical solution of the embodiment of the present application, the flexible circuit board includes a circuit board body and a connecting portion. At least part of the connecting portion is disposed on one side of the circuit board body along the width direction of the flexible circuit board, so that the connecting portion extends beyond the circuit board body along the width direction of the flexible circuit board, and the connecting portion occupies a certain space along the width direction of the flexible circuit board. The circuit board body has at least one folding portion, and the folding portion is configured to be able to extend the length of the circuit board body along the length direction of the flexible circuit board after being folded. With such a setting, the circuit board body can be unfolded after being folded by the folding portion, and the connecting portion changes its length direction as the circuit board body unfolds. After the circuit board body is unfolded, the length direction of the connecting portion can be the same as the length direction of the flexible circuit board, that is, the flexible circuit board of the present application is in a folded state after assembly and in an unfolded state before assembly and before cutting. The flexible circuit board is cut in the arrangement mode of the unfolded state, which can reduce the occupied space of the connecting portion in the width direction of the cutting material, increase the number of flexible circuit boards cut by the cutting material, reduce the waste of the cutting material, improve the utilization rate of the cutting material, and thus reduce the production cost of the flexible circuit board. Moreover, the connecting portion is welded to the battery management circuit board of the battery management system, that is, the flexible circuit board is directly welded to the battery management circuit board without being connected through a connector. In this way, the number of parts of the battery device is reduced, and thus the production cost of the battery device is reduced. It can be seen that the technical solution of the present application can reduce the production cost of the battery device.

[0022] The present application also proposes an electrical device, which includes a battery device for storing or providing electrical energy.

[0023] The present application also provides a flexible circuit board, which includes a circuit board body and a connection part. The circuit board body is used to connect with a battery cell to collect signals. The circuit board body has at least one folding part, and the folding part is configured to be able to extend along the length direction of the flexible circuit board to extend the length of the circuit board body; the connection part is connected to the circuit board body, and at least part of the connection part is arranged on one side of the circuit board body along the width direction of the flexible circuit board; the connection part is used for plugging or crimping with a connector, or the connection part is used for soldering connection with a battery management circuit board of a battery management system.

[0024] In the technical solution of the embodiment of the present application, at least part of the connection part is arranged on one side of the circuit board body along the width direction of the flexible circuit board, so that the connection part extends beyond the circuit board body along the width direction of the flexible circuit board, and the connection part occupies a certain space along the width direction of the flexible circuit board; and the circuit board body has at least one folding part, and the folding part is configured to be able to extend the length of the circuit board body along the length direction of the flexible circuit board after being folded. With such a setting, the circuit board body can be unfolded after being folded by the folding part, and the connection part changes its length direction as the circuit board body unfolds. After the circuit board body is unfolded, the length direction of the connection part can be the same as the length direction of the flexible circuit board, that is, the flexible circuit board of the present application is in a folded state after assembly and in an unfolded state before assembly and before cutting. The flexible circuit board is cut in the arrangement mode of the unfolded state, which can reduce the occupied space of the connection part in the width direction of the cutting material, increase the number of flexible circuit boards cut by the cutting material, reduce the waste of the cutting material, improve the utilization rate of the cutting material, and thus reduce the production cost of the flexible circuit board.

[0025] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 It is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0028] Figure 2Schematic diagram of the exploded structure of the battery device according to some embodiments of the present application;

[0029] Figure 3 Schematic diagram of the structure of the flexible circuit board before cutting according to some embodiments of the present application;

[0030] Figure 4 Schematic diagram of the structure of the flexible circuit board after cutting and before folding according to some embodiments of the present application;

[0031] Figure 5 Schematic diagram of a partial structure of the circuit board body without folding according to some embodiments of the present application;

[0032] Figure 6 Schematic diagram of a partial structure of the circuit board body after being folded once according to some embodiments of the present application;

[0033] Figure 7 Schematic diagram of a partial structure of the circuit board body after being folded twice according to some embodiments of the present application;

[0034] Figure 8 Schematic diagram of the circuit board body after being folded twice according to some embodiments of the present application;

[0035] Figure 9 Is Figure 8 Enlarged view of part A in

[0036] Explanation of the reference numerals in the drawings:

[0037] 1. Vehicle;

[0038] 10. Battery device;

[0039] 100. Battery cell;

[0040] 200. Flexible circuit board; 210. Circuit board body; 211. Folding part; 212. First flexible section; 213. Second flexible section; 214. Third flexible section; 220. Connection part; 221. First insertion arm; 222. Bending part; 223. Second insertion arm;

[0041] 300. Box body; 310. First part; 320. Second part;

[0042] 20. Controller;

[0043] 30. Motor.

[0044] The realization, functional features and advantages of the object of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and thus are only examples and should not be used to limit the protection scope of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and above drawings of this application are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0048] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0050] In the description of the embodiments of this application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0053] With the wide application of batteries in energy storage power systems, electric vehicles and other fields, for example: energy storage power systems include hydropower, wind power, thermal power, solar power and other power station energy storage systems; electric vehicles include electric cars, electric motorcycles and electric bicycles, etc.; people also pay particular attention to the production cost problem of batteries.

[0054] For the reliable operation of the battery device, the battery device samples information such as the voltage and temperature of each battery cell. Since the flexible printed circuit board (usually abbreviated as FPC) is flexible and small in volume, it can save a certain amount of internal space for the grouped batteries and is used more and more widely. However, the flexible printed circuit board is cut out. The fewer the number of flexible printed circuit boards cut out from the roll material, the higher the production cost of the flexible printed circuit board. Especially for long strip-shaped flexible printed circuit boards, if the connection part of the flexible printed circuit board occupies more space in the width direction of the flexible printed circuit board, the flexible printed circuit boards directly cut out from the roll material will cause a large amount of material waste, resulting in a higher production cost of the flexible printed circuit board, that is, the flexible printed circuit board with low material utilization rate will increase the production cost of the battery device.

[0055] Based on the above considerations, in order to solve the problem of high production cost of the battery device, the present application proposes a new battery device. The flexible printed circuit board in this battery device has a high material utilization rate during cutting, so that the production cost of the flexible printed circuit board is low, thereby reducing the production cost of the battery device.

[0056] Further, in the above battery device, there may be multiple battery cells. Among them, the battery cell can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The shape of the battery cell can be cylindrical, flat, cuboid or other shapes, etc., and the present application does not specifically limit the shape of the battery cell. Multiple battery cells can be connected in series, in parallel, or in a hybrid connection including both series and parallel. After several battery cells are connected in series, in parallel or in a hybrid connection, they can form a battery module, and the flexible circuit board can be at least used to collect the voltage signals of the battery module composed of multiple battery cells.

[0057] An embodiment of the present application provides an electrical device using the battery device as a power source. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys and electric aircraft toys, etc., and the spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0058] For the convenience of description, the following embodiments will take a vehicle 1 as an example of an electrical device according to an embodiment of the present application.

[0059] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1 provided by some embodiments of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is arranged inside the vehicle 1, and the battery device 10 can be arranged at the bottom, head or tail of the vehicle 1. The battery device 10 can be used for power supply of the vehicle 1. For example, the battery device 10 can be used as the operating power source of the vehicle 1. The vehicle 1 can also include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to supply power to the motor 30. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1.

[0060] In some embodiments of the present application, the battery device 10 can not only be used as the operating power source of the vehicle 1, but also as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0061] Please refer to Figure 2 , Figure 2Exploded view of the battery device 10 provided by some embodiments of the present application. The battery device 10 includes a box body 300 and battery cells 100, and the battery cells 100 are accommodated in the box body 300. Among them, the box body 300 is used to provide an accommodation space for the battery cells 100, and the box body 300 can adopt various structures. In some embodiments, the box body 300 may include a first part 310 and a second part 320, the first part 310 and the second part 320 cover each other, and the first part 310 and the second part 320 jointly define an accommodation space for accommodating the battery cells 100. The second part may be a hollow structure with one end open, and the first part may be a plate-like structure. The first part covers the open side of the second part so that the first part and the second part jointly define an accommodation space; the first part and the second part may also both be hollow structures with one side open, and the open side of the first part covers the open side of the second part. Of course, the box body formed by the first part and the second part can be of various shapes, such as a cylinder, a cuboid, etc.

[0062] In the battery device 10, there may be multiple battery cells 100, and the multiple battery cells 100 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 100. The multiple battery cells 100 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 100 is accommodated in the box body 300; of course, the battery device 10 can also be a form in which multiple battery cells 100 are first connected in series, in parallel, or in a mixed connection to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection as a whole and accommodated in the box body 300. The battery device 10 may further include other structures. For example, the battery device 10 may further include a busbar component for realizing the electrical connection among the multiple battery cells 100.

[0063] Among them, each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but not limited thereto. The battery cells can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0064] In an embodiment of the present application, the present application provides a battery device 10. The battery device 10 includes at least one battery cell 100, a flexible circuit board 200, a connector, and a battery management system. The flexible circuit board 200 includes a circuit board body 210 and a connecting portion 220 (such as Figure 8 and Figure 9As shown in the figure, the connecting portion 220 is connected to the circuit board body 210, and at least a part of the connecting portion 220 is disposed on one side of the circuit board body 210 along the width direction of the flexible circuit board 200. The circuit board body 210 is connected to the battery cell 100 to collect signals. The circuit board body 210 has at least one folding portion 211, and the folding portion 211 is configured to extend the length of the circuit board body 210 along the length direction of the flexible circuit board 200 after being folded. The connecting portion 220 is inserted or crimped with a connector. The connector is connected to the battery management system.

[0065] Figure 3 FIG. 4 is a schematic structural diagram of the flexible circuit board 200 before cutting in an embodiment of the present application, that is, a schematic layout diagram of the flexible circuit board 200 in the cutting material. Figure 3 In the cutting material of the embodiment in FIG. 4, 7 flexible circuit boards 200 can be cut out. Of course, in other embodiments, multiple flexible circuit boards can also be cut out, and the specific number is not limited.

[0066] Figure 4 FIG. 10 is a schematic structural diagram of the flexible circuit board cut from the cutting material. Among them, the circuit board body 210 of the flexible circuit board 200 has at least one folding portion 211, and at this time, the folding portion 211 is not folded.

[0067] Figures 5 to 7 FIG. 14 is a schematic diagram of the change in the folded state of the circuit board body 210. Figure 5 FIG. 16 is a schematic partial structural diagram of the circuit board body 210 without being folded. Figure 6 FIG. 18 is a schematic partial structural diagram of the circuit board body 210 after being folded once. Figure 7 FIG. 20 is a schematic partial structural diagram of the circuit board body 210 after being folded twice.

[0068] In the battery device 10 of the present application, the circuit board body 210 of the flexible circuit board 200 is assembled in the battery device 10 after being folded. As Figure 8 shown in Figure 8 FIG. 27 is a schematic structural diagram of the circuit board body 210 of the flexible circuit board 200 after being folded twice in an embodiment of the present application. In Figure 8 FIG. 29, the X direction is the length direction of the flexible circuit board 200, the Y direction is the width direction of the flexible circuit board 200, and the direction perpendicular to X and Y is the thickness direction of the flexible circuit board 200.

[0069] It can be understood that the flexible circuit board 200 (Flexible Printed Circuit board, FPC) is a printed circuit board made of a flexible insulating substrate, such as polyimide or polyester film. Under the action of an external force, the flexible circuit board 200 with a folding portion 211 can be folded.

[0070] The number of the connecting portions 220 may be one, two, or more, and the specific number is not limited herein. The connecting portions 220 are connected to the circuit board body 210. In the battery device 10, at least some of the connecting portions 220 are disposed on one side of the circuit board body 210 along the Y direction, that is, in the battery device 10, at least some of the connecting portions 220 extend upward beyond the circuit board body 210 along the Y direction, and / or at least some of the connecting portions 220 extend downward beyond the circuit board body 210 along the Y direction. That is to say, in addition to the circuit board body 210, at least some of the connecting portions 220 also occupy a certain space in the Y direction.

[0071] The circuit board body 210 may have one, two, or more folding portions 211, which may be specifically set according to needs. The folding portion 211 is configured to be able to extend the length of the circuit board body 210 along the length direction of the flexible circuit board 200 after being folded, that is, the folding portion 211 has flexibility. The circuit board body 210 can change its length by folding or flipping. After the circuit board body 210 is folded by the folding portion 211, the length of the circuit board body 210 becomes shorter, and the folded state of the folded circuit board body 210 is the state assembled in the battery device 10. After the circuit board body 210 is unfolded by flipping, the length of the circuit board body 210 becomes longer when it is unfolded, and the unfolded state of the circuit board body 210 is the state before assembly and after cutting (as Figure 4 shown).

[0072] The connector is a plug-in component for transmitting current or signals. The connecting portion 220 is plugged or crimped with the connector. After the connecting portion 220 and the connector are assembled, the connector serves as the output end of the flexible circuit board 200. The circuit board body 210 conveys the collected parameter information to the connector through the connecting portion 220, and then conveys the collected information to the battery management system through the connector. The battery management system is a device that realizes functions such as intelligent management and maintenance of the battery cells 100, prevention of overcharging and over-discharging, extension of the battery service life, and monitoring of the battery state.

[0073] In the technical solution of the present application, at least part of the connecting portion 220 is disposed on one side of the circuit board body 210 along the width direction of the flexible circuit board 200, so that the connecting portion 220 extends beyond the circuit board body 210 along the width direction of the flexible circuit board 200, and the connecting portion 220 occupies a certain space along the width direction of the flexible circuit board 200; and the circuit board body 210 has at least one folding portion 211, and the folding portion 211 is configured to be able to extend the length of the circuit board body 210 along the length direction of the flexible circuit board 200 after being folded. With such a setting, the circuit board body 210 can be unfolded after being folded by the folding portion 211, and the length direction of the connecting portion 220 changes with the unfolding of the circuit board body 210. After the circuit board body 210 is unfolded, the length direction of the connecting portion 220 can be the same as the length direction of the flexible circuit board 200, that is, the flexible circuit board 200 of the present application is in a folded state after assembly and in an unfolded state before assembly and before cutting. The flexible circuit board 200 is cut in the arrangement mode of the unfolded state, which can reduce the occupied space of the connecting portion 220 in the width direction of the cutting material, increase the number of flexible circuit boards 200 cut by the cutting material, reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board 200. Moreover, the connecting portion 220 is plugged or crimped with the connector, which is beneficial to simplifying the assembly process of the connecting portion 220 and the connector and improving the assembly efficiency of the battery device 10. It can be seen that the technical solution of the present application can reduce the production cost of the battery device 10.

[0074] According to some embodiments of the present application, optionally, please refer to Figure 8 , the flexible circuit board 200 includes a plurality of connecting portions 220, and the plurality of connecting portions 220 are arranged in sequence along the width direction of the flexible circuit board 200.

[0075] The number of the connecting portions 220 can be two, three, or more, and is not specifically limited herein. The plurality of connecting portions 220 can be connected to a plurality of connectors. Of course, it can also be that a plurality of connectors are connected to one connector. That is to say, the number of the connecting portions 220 and the number of the connectors do not have to correspond one by one, and can be specifically set according to needs.

[0076] In this embodiment, in the battery device 10, after the flexible circuit board 200 is folded, the plurality of connecting portions 220 are arranged at intervals in sequence along the Y direction, and the plurality of connecting portions 220 occupy a certain space along the Y direction. And the folding portion 211 of the flexible circuit board 200 can be unfolded after being folded, that is, the flexible circuit board 200 is in an unfolded state before assembly, that is, the flexible circuit board 200 is cut in the arrangement mode of the unfolded state (such as Figure 3 and Figure 4As shown in the figure, a plurality of connection parts 220 can be cut out along the length direction of the flexible circuit board 200, and then folded and arranged in sequence along the Y direction when assembled. In this way, the space occupied by the plurality of connection parts 220 in the width direction of the cutting material can be reduced, the waste of cutting materials can be reduced, and the utilization rate of cutting materials can be improved, so as to reduce the production cost of the flexible circuit board 200, thereby reducing the production cost of the battery device 10.

[0077] According to some embodiments of the present application, optionally, the connecting portion 220 is disposed at one end of the circuit board body 210 along its length direction, the connector includes a connecting base and a connecting terminal disposed on the connecting base, the connecting base has a plug-in slot, the connecting portion 220 is inserted into the plug-in slot and connected to the connecting terminal.

[0078] The number of the plugging slots on the connection base is not limited, and can be one, two, or more. The number of the connection terminals can be multiple, and multiple connection terminals are inserted on the connection base, and the connection part 220 is inserted in the plugging slot and electrically connected to the connection terminals.

[0079] In this embodiment, the circuit board body 210 and the connecting portion 220 are arranged along the length direction of the flexible circuit board 200, which is beneficial to reducing the space occupied by the connecting portion 220 in the width direction of the flexible circuit board 200, and a plug-in groove is provided on the connecting base of the connector to facilitate the plug-in of the connecting portion 220 located at one end of the flexible circuit board 200 with the connector. The plug-in assembly process is simple, which is beneficial to improving assembly efficiency.

[0080] According to some embodiments of the present application, optionally, the connecting portion 220 includes a first plug-in arm 221, a bending portion 222 and a second plug-in arm 223 connected in sequence, the first plug-in arm 221 is connected to the circuit board body 210, and along the thickness direction of the flexible circuit board 200, the projection of the first plug-in arm 221 at least partially falls on the second plug-in arm 223, and the connecting base has at least two plug-in slots, and the first plug-in arm 221 and the second plug-in arm 223 are respectively inserted in a plug-in slot.

[0081] like Figure 9 As shown, Figure 9 for Figure 8 The enlarged view of point A in the middle Figure 8 and Figure 9 In the embodiment, the bent portion 222 of the connecting portion 220 is not folded. When the flexible circuit board 200 is assembled in the battery device 10, the connecting portion 220 is connected to the connector after being folded by the bent portion 222, so that along the thickness direction of the flexible circuit board 200, the projection of the first plug arm 221 at least partially falls on the second plug arm 223.

[0082] In the battery device 10, after the connecting portion 220 is folded by the bending portion 222 and inserted into the connector, along the thickness direction of the flexible circuit board 200, the projection of the first insertion arm 221 can entirely fall on the second insertion arm 223. Of course, it is also possible that a part of the projection of the first insertion arm 221 falls on the second insertion arm 223, and specific details are not limited herein. The connection base can have a plurality of insertion slots, and each insertion slot can be used for an insertion arm to be inserted, which is beneficial to improving the utilization rate.

[0083] In this embodiment, the first insertion arm 221 and the second insertion arm 223 are folded by the bending portion 222, and the first insertion arm 221 and the second insertion arm 223 are respectively inserted into an insertion slot. In this way, the space in the thickness direction of the flexible circuit board 200 is fully utilized, improving the structural compactness of the connection between the connecting portion 220 and the connector. Moreover, the first insertion arm 221 and the second insertion arm 223 are respectively connected to the connection terminals of the connector, so as to be able to output multiple signals, thereby improving the electrical performance of the flexible circuit board 200.

[0084] According to some embodiments of the present application, optionally, the connector includes connection terminals, and the connection terminals include a terminal body and a crimping portion. The crimping portion is connected to the terminal body and encloses a crimping groove, and the connecting portion 220 is inserted into the crimping groove, and the crimping portion is crimped on the connecting portion 220.

[0085] It can be understood that one side of the crimping groove can be open. Of course, the crimping groove can also be annular or other shapes, which are not limited herein. The crimping portion crimps and fixes the connecting portion 220 inserted into the crimping groove, ensuring the stability of the connection between the connecting portion 220 and the connection terminal.

[0086] In this embodiment, by providing a crimping groove on the connection terminal, it is convenient for the connecting portion 220 to be inserted and positioned, and the crimping portion is crimped on the connecting portion 220. Compared with the welding solution, this solution is beneficial to improving the assembly efficiency, reducing the labor cost, and the crimping method reduces the risk of detachment and improves the connection stability.

[0087] According to some embodiments of the present application, optionally, the crimping portion includes a crimping section and a tip section. The terminal body, the crimping section and the tip section are sequentially connected and enclose a crimping groove, and the tip section pierces and crimps on the connecting portion 220.

[0088] Piercing and crimping is to apply a certain pressure to the component used for piercing and crimping, such as the tip section in the present application, so that the component is embedded into the pierced component to achieve a connection method. This method is applicable to materials with relatively soft textures. In this embodiment, when the relatively soft connecting portion 220 is connected to the crimping portion, the tip section pierces through the connecting portion 220 and connects with the connecting portion 220, thereby realizing the electrical connection between the connection terminal and the flexible circuit board 200.

[0089] In this embodiment, the texture of the connecting portion 220 of the flexible circuit board 200 is relatively soft. The tip segment pierces through the connecting portion 220 and is crimped and fixed to the connecting portion 220, thereby improving the connection stability between the connecting portion 220 and the connecting terminal and further reducing the risk of the connecting portion 220 falling off.

[0090] According to some embodiments of the present application, optionally, the terminal body has a first edge and a second edge oppositely arranged along its width direction, and at least one crimping portion is respectively provided on the first edge and the second edge.

[0091] The number of the crimping portions on the first edge and the second edge of the terminal body can be one, two, or multiple, and is not specifically limited. That is to say, the connecting terminal can include multiple crimping portions, and the multiple crimping portions are arranged on both sides of the terminal body, so as to strengthen the fixed connection between the connecting portion 220 and the connecting terminal.

[0092] In this embodiment, crimping portions are provided on both sides of the connecting terminal, so as to strengthen the connection effect between the connecting portion 220 and the connecting terminal and improve the connection stability.

[0093] According to some embodiments of the present application, optionally, please refer to Figures 5 to 7 , the circuit board body 210 includes a first flexible segment 212 and a second flexible segment 213. The first flexible segment 212 and the second flexible segment 213 are connected by at least one folding portion 211. The first flexible segment 212 extends along the length direction of the flexible circuit board 200, and the length direction of the second flexible segment 213 intersects with the length direction of the first flexible segment 212, and a part of the second flexible segment 213 is stacked on the first flexible segment 212.

[0094] After the first flexible segment 212 and the second flexible segment 213 are folded by the folding portion 211, an angle is formed between the length direction of the first flexible segment 212 and the length direction of the second flexible segment 213. The size of the angle is not limited and can be an acute angle, a right angle, or an obtuse angle. In this embodiment, the angle formed between the length direction of the first flexible segment 212 and the length direction of the second flexible segment 213 is 90 degrees, that is, the angle between the length direction of the folding portion 211 and the length direction of the flexible circuit board 200 is 45 degrees, so that a part of the second flexible segment 213 is stacked on the first flexible segment 212, and another part of the second flexible segment 213 extends beyond the circuit board body 210 along the width direction of the flexible circuit board 200.

[0095] In this embodiment, the length extension directions of the first flexible section 212 and the second flexible section 213 are different, that is, the flexible circuit board 200 is folded at least once during assembly. After the flexible circuit board 200 is assembled, a part of the second flexible section 213 is stacked on the first flexible section 212. By flipping the folding portion 211, the circuit board body 210 can be unfolded, thereby extending the length of the circuit board body 210. The connecting portion 220 can be provided on the second flexible section 213. When the circuit board body 210 is unfolded, the length direction of the connecting portion 220 can be the same as the length direction of the flexible circuit board 200, so as to reduce the occupied space of the connecting portion 220 in the width direction of the cutting material, and further reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board 200.

[0096] According to some embodiments of the present application, optionally, please refer to Figures 5 to 9 , the circuit board body 210 further includes a third flexible section 214. The third flexible section 214 and the second flexible section 213 are connected by at least one folding portion 211. The length direction of the third flexible section 214 intersects with the length direction of the first flexible section 212, and at least part of the third flexible section 214 is stacked on the second flexible section 213.

[0097] After the second flexible section 213 and the third flexible section 214 are folded by the folding portion 211, an angle is formed between the length direction of the third flexible section 214 and the length direction of the first flexible section 212. The size of this angle is not limited and can be an acute angle, a right angle, or an obtuse angle. An angle can be formed between the length direction of the third flexible section 214 and the length direction of the second flexible section 213, or they can be arranged in coincidence. In this embodiment, the length direction of the third flexible section 214 coincides with the length direction of the second flexible section 213, that is, the angle formed between the length direction of the third flexible section 214 and the length direction of the first flexible section 212 is 90 degrees, and the length direction of the folding portion 211 between the second flexible section 213 and the third flexible section 214 is parallel to the length direction of the flexible circuit board 200, so that at least part of the third flexible section 214 can be stacked on the second flexible section 213.

[0098] In this embodiment, the length extension directions of the third flexible section 214 and the first flexible section 212 are different, that is, the flexible circuit board 200 is folded at least twice during assembly. After the flexible circuit board 200 is assembled, at least a part of the third flexible section 214 is stacked on the second flexible section 213. Through the double folding of the flexible circuit board 200, the orientations of the electrical connection positions in the connection part 220 on the flexible circuit board 200 before cutting and after folding are the same, which is beneficial to ensuring the electrical performance of the flexible circuit board 200. Moreover, the first flexible section 212, the second flexible section 213, and the third flexible section 214 can be turned over through the folding part 211, so as to unfold the circuit board body 210, thereby extending the length of the circuit board body 210. When the circuit board body 210 is unfolded, the length direction of the connection part 220 can be the same as the length direction of the flexible circuit board 200, so as to reduce the occupied space of the connection part 220 in the width direction of the cutting material, and further reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board 200.

[0099] According to some embodiments of the present application, optionally, the second flexible section 213 has a first stacking surface stacked with the first flexible section 212 and a second stacking surface stacked with the third flexible section 214, and the first stacking surface and the second stacking surface are arranged back to back on the second flexible section 213.

[0100] The sizes of the first stacking surface and the second stacking surface on the second flexible section 213 are not limited. The first stacking surface and the second stacking surface are arranged back to back on the second flexible section 213, that is, they are arranged on the opposite sides of the second flexible section 213, and the stacking surfaces do not overlap, avoiding the situation where the third flexible section 214 and the first flexible section 212 interfere with each other.

[0101] In this embodiment, the third flexible section 214 is folded toward the side away from the first flexible section 212, which is convenient for the folding and assembly of the flexible circuit board 200. At the same time, the third flexible section 214 and the first flexible section 212 do not interfere with each other, making the structural arrangement of the folded flexible circuit board 200 smooth.

[0102] According to some embodiments of the present application, optionally, along the length direction of the flexible circuit board 200, the connection part 220 is arranged at one end of the third flexible section 214 facing away from the first flexible section 212.

[0103] The connection part 220 is arranged on the third flexible section 214 and is set away from the first flexible section 212, and the connection part 220 does not interfere with the second flexible section 213 and the first flexible section 212.

[0104] In this embodiment, when the circuit board body 210 is unfolded, the length direction of the connecting portion 220 can be the same as the length direction of the flexible circuit board 200, so as to reduce the occupied space of the connecting portion 220 in the width direction of the cutting material, thereby reducing the waste of the cutting material, improving the utilization rate of the cutting material, and reducing the production cost of the flexible circuit board 200.

[0105] According to some embodiments of the present application, optionally, a colloid is provided at the stacking position of the first flexible section 212 and the second flexible section 213, and the colloid bonds the first flexible section 212 and the second flexible section 213; and / or, a colloid is provided at the stacking position of the second flexible section 213 and the third flexible section 214, and the colloid bonds the second flexible section 213 and the third flexible section 214.

[0106] Exemplarily, liquid glue can be filled in the gap between two adjacent flexible sections, and the liquid glue forms a colloid after drying. As another example, the colloid can also be double-sided tape, solid glue, etc. The glue is pasted or coated on the flexible section, and then the two adjacent flexible sections can be bonded by squeezing.

[0107] In this embodiment, by bonding the stacking position of the first flexible section 212 and the second flexible section 213 with a colloid, and / or by bonding the stacking position of the second flexible section 213 and the third flexible section 214 with a colloid, it is convenient to shape the folded circuit board body 210 and ensure the stability of the flexible circuit board 200 after folding and assembling.

[0108] According to some embodiments of the present application, optionally, a support member is provided at the stacking position of the first flexible section 212 and the second flexible section 213, and colloids are respectively provided on the surface of the support member facing the first flexible section 212 and the surface facing the second flexible section 213; and / or, a support member is provided at the stacking position of the second flexible section 213 and the third flexible section 214, and colloids are respectively provided on the surface of the support member facing the second flexible section 213 and the surface facing the third flexible section 214.

[0109] The thickness of the support member can be selected as needed. The support member can be a sheet-like structure, and its thickness direction is the same as the thickness direction of the flexible circuit board 200. The sheet-like support member will not overly increase the size of the flexible circuit board 200 in the thickness direction, reducing the possibility of interference between the flexible circuit board 200 and the battery box body 300.

[0110] The support member can exert a certain supporting effect on the flexible section, appropriately increasing the gap between two adjacent flexible sections. Moreover, by providing the colloid on the surface of the support member, the operation is simple, which is beneficial to improving the assembly efficiency.

[0111] In this embodiment, the support member can provide a certain degree of support to the stacked portion of the first flexible section 212 and the second flexible section 213, appropriately increasing the gap between the first flexible section 212 and the second flexible section 213, buffering the commutation angle therebetween, and reducing the possibility of breakage due to the large-angle commutation of the folding portion 211. Similarly, the support member can provide a certain degree of support to the stacked portion of the second flexible section 213 and the third flexible section 214, appropriately increasing the gap between the second flexible section 213 and the third flexible section 214, buffering the commutation angle therebetween, and reducing the possibility of breakage due to the large-angle commutation of the folding portion 211. Moreover, by disposing the colloid on the surface of the support member, the gluing operation is simple, which is beneficial to simplifying the assembly process.

[0112] According to some embodiments of the present application, the support member is configured to be capable of generating compressive deformation in the thickness direction of the flexible circuit board 200.

[0113] The support member can be compressed and deformed in the thickness direction of the flexible circuit board 200 under the action of an external force. Optionally, the support member can be a deformable member capable of generating elastic deformation or plastic deformation. Exemplarily, the support member can be a foam.

[0114] In this embodiment, the size of the support member in the thickness direction can be compressed by squeezing it, thereby reducing the size of the folding portion 211 in the thickness direction of the flexible circuit board 200 and reducing the possibility of structural interference between the flexible circuit board 200 and the battery box 300. During the battery assembly process, even if there is a certain abutment between the folding portion 211 and the battery box 300, the influence of the battery box 300 on the internal circuit of the folding portion 211 can be reduced by the compressive deformation of the support member.

[0115] According to some embodiments of the present application, the present application provides a battery device 10. The battery device 10 includes at least one battery cell 100, a flexible circuit board 200, a connector, and a battery management system. The flexible circuit board 200 includes a circuit board body 210 and a connecting portion 220. The connecting portion 220 is connected to the circuit board body 210, and at least a part of the connecting portion 220 is disposed on one side of the circuit board body 210 along the width direction of the flexible circuit board 200. The circuit board body 210 is connected to the battery cell 100 to collect signals. The circuit board body 210 has at least one folding portion 211, and the folding portion 211 is configured to extend the length of the circuit board body 210 along the length direction of the flexible circuit board 200 after being folded. The connecting portion 220 is inserted or crimped with the connector. The connector is connected to the battery management system. The flexible circuit board 200 includes a plurality of connecting portions 220, and the plurality of connecting portions 220 are arranged in sequence along the width direction of the flexible circuit board 200. The connecting portion 220 is disposed at one end of the circuit board body 210 along its length direction. The connector includes a connecting base and connecting terminals disposed on the connecting base. The connecting base has a socket, and the connecting portion 220 is inserted into the socket and connected to the connecting terminals. The connecting portion 220 includes a first insertion arm 221, a bending portion 222, and a second insertion arm 223 that are connected in sequence. The first insertion arm is connected to the circuit board body 210. Along the thickness direction of the flexible circuit board 200, the projection of the first insertion arm at least partially falls on the second insertion arm 223. The connecting base has at least two sockets, and the first insertion arm 221 and the second insertion arm 223 are respectively inserted into a socket. Further, the circuit board body 210 includes a first flexible section 212 and a second flexible section 213. The first flexible section 212 and the second flexible section 213 are connected by at least one folding portion 211. The first flexible section 212 extends along the length direction of the flexible circuit board 200. The length direction of the second flexible section 213 intersects with the length direction of the first flexible section 212, and a part of the second flexible section 213 is stacked on the first flexible section 212. The circuit board body 210 further includes a third flexible section 214. The third flexible section 214 and the second flexible section 213 are connected by at least one folding portion 211. The length direction of the third flexible section 214 intersects with the length direction of the first flexible section 212, and at least a part of the third flexible section 214 is stacked on the second flexible section 213. The second flexible section 213 has a first stacking surface stacked with the first flexible section 212 and a second stacking surface stacked with the third flexible section 214. The first stacking surface and the second stacking surface are disposed back to back on the second flexible section 213. Along the length direction of the flexible circuit board 200, the connecting portion 220 is disposed at one end of the third flexible section 214 away from the first flexible section 212. A colloid is provided at the stacking portion of the first flexible section 212 and the second flexible section 213, and the colloid bonds the first flexible section 212 and the second flexible section 213; a colloid is provided at the stacking portion of the second flexible section 213 and the third flexible section 214, and the colloid bonds the second flexible section 213 and the third flexible section 214.A support member is provided at the stacking position of the first flexible section 212 and the second flexible section 213, and colloids are respectively provided on the surface of the support member facing the first flexible section 212 and the surface facing the second flexible section 213; a support member is provided at the stacking position of the second flexible section 213 and the third flexible section 214, and colloids are respectively provided on the surface of the support member facing the second flexible section 213 and the surface facing the third flexible section 214. Further, the support member can be a foam.

[0116] In an embodiment of the present application, the present application provides a battery device 10. The battery device 10 includes at least one battery cell 100, a flexible circuit board 200, and a battery management system. The flexible circuit board 200 includes a circuit board body 210 and a connection portion 220. The connection portion 220 is connected to the circuit board body 210, and at least a part of the connection portion 220 is disposed on one side of the circuit board body 210 along the width direction of the flexible circuit board 200. The circuit board body 210 is connected to the battery cell 100 to collect signals. The circuit board body 210 has at least one folding portion 211, and the folding portion 211 is configured to be able to extend along the length direction of the circuit board body 210 to extend the length of the circuit board body 210. The battery management system includes a battery management circuit board, and the battery management circuit board has a welding portion, and the connection portion 220 is welded to the welding portion.

[0117] The difference between this embodiment and the foregoing embodiment is that the connection portion 220 of the flexible circuit board 200 in this embodiment is directly welded to the battery management circuit board of the battery management system, and the flexible circuit board 200 of this embodiment does not need to be connected through a connector, thus reducing the number of parts of the battery device 10, and thereby reducing the production cost of the battery device 10.

[0118] In the technical solution of the embodiment of the present application, the flexible circuit board 200 includes a circuit board body 210 and a connecting portion 220. At least a part of the connecting portion 220 is disposed on one side of the circuit board body 210 along the width direction of the flexible circuit board 200, so that the connecting portion 220 extends beyond the circuit board body 210 along the width direction of the flexible circuit board 200, and the connecting portion 220 occupies a certain space along the width direction of the flexible circuit board 200. The circuit board body 210 has at least one folding portion 211, and the folding portion 211 is configured to be able to extend along the length direction of the flexible circuit board 200 to extend the length of the circuit board body 210. With such a setting, the circuit board body 210 can be unfolded after being folded by the folding portion 211, and the length direction of the connecting portion 220 changes with the unfolding of the circuit board body 210. After the circuit board body 210 is unfolded, the length direction of the connecting portion 220 can be the same as the length direction of the flexible circuit board 200, that is, the flexible circuit board 200 of the present application is in a folded state after assembly and in an unfolded state before assembly and before cutting. The flexible circuit board 200 is cut in the arrangement mode of the unfolded state, which can reduce the occupied space of the connecting portion 220 in the width direction of the cutting material, increase the number of flexible circuit boards 200 cut by the cutting material, reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board 200. Moreover, the connecting portion 220 is welded to the battery management circuit board of the battery management system, that is, the flexible circuit board 200 is directly welded to the battery management circuit board without being connected through a connector. In this way, the number of parts of the battery device 10 is reduced, thereby reducing the production cost of the battery device 10. It can be seen that the technical solution of the present application can reduce the production cost of the battery device 10.

[0119] In an embodiment of the present application, the present application provides a flexible circuit board 200. The flexible circuit board 200 includes a circuit board body 210 and a connecting portion 220. The circuit board body 210 is used to connect with the battery cell 100 to collect signals. The circuit board body 210 has at least one folding portion 211, and the folding portion 211 is configured to be able to extend along the length direction of the flexible circuit board 200 to extend the length of the circuit board body 210. The connecting portion 220 is connected to the circuit board body 210, and at least a part of the connecting portion 220 is disposed on one side of the circuit board body 210 along the width direction of the flexible circuit board 200. The connecting portion 220 is used to be inserted or crimped with a connector, or the connecting portion 220 is used to be welded to the battery management circuit board of the battery management system.

[0120] In this embodiment, it is considered that in the actual application process, it is necessary to produce the flexible circuit board 200 in advance and then assemble the flexible circuit board 200 in the battery device 10. In the flexible circuit board 200 of this embodiment, the circuit board body 210 can be unfolded after being folded by the folding part 211, and the connecting part 220 changes its length direction along with the unfolding of the circuit board body 210. After the circuit board body 210 is unfolded, the length direction of the connecting part 220 can be the same as the length direction of the flexible circuit board 200, that is, the flexible circuit board 200 of the present application has a folded state and an unfolded state. It is in the folded state after assembly and in the unfolded state before assembly and before cutting. The flexible circuit board 200 is cut in the arrangement mode of the unfolded state, which can reduce the occupied space of the connecting part 220 in the width direction of the cutting material, increase the number of flexible circuit boards 200 cut by the cutting material, reduce the waste of the cutting material, improve the utilization rate of the cutting material, and reduce the production cost of the flexible circuit board 200. The other technical effects obtained by the technical solution of this embodiment are the same as those of the foregoing embodiments, and will not be elaborated herein one by one.

[0121] The present application also provides an electrical device, which includes the battery device 10. The specific structure of the battery device 10 refers to the foregoing embodiments. Since this electrical device adopts all the technical solutions of the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be elaborated herein one by one. Among them, the battery device 10 is used to store or provide electric energy. The electrical device can be an electric vehicle, an electric motorcycle, an electric bicycle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: at least one battery cell; A flexible circuit board, comprising a circuit board body and a connecting portion, wherein the connecting portion is connected to the circuit board body, and at least part of the connecting portion is arranged on one side of the circuit board body along the width direction of the flexible circuit board; the circuit board body is connected to the battery cell to collect signals; the circuit board body has at least one folding portion, and the folding portion is configured to extend the length of the circuit board body along the length direction of the flexible circuit board after being folded; A connector, wherein the connecting portion is plug-connected or crimped with the connector; and A battery management system, the connector is connected to the battery management system.

2. The battery device according to claim 1, characterized in that The flexible circuit board includes a plurality of the connecting parts, and the plurality of the connecting parts are sequentially arranged at intervals along a width direction of the flexible circuit board.

3. The battery device according to claim 1, characterized in that: The connecting portion is arranged at one end of the circuit board body along its length direction, the connector includes a connecting base and a connecting terminal arranged on the connecting base, the connecting base has an inserting slot, the connecting portion is inserted into the inserting slot and connected to the connecting terminal.

4. The battery device according to claim 3, characterized in that: The connecting portion includes a first plug-in arm, a bending portion, and a second plug-in arm connected in sequence, the first plug-in arm is connected to the circuit board body, and along the thickness direction of the flexible circuit board, the projection of the first plug-in arm at least partially falls on the second plug-in arm, and the connecting base has at least two plug-in slots, and the first plug-in arm and the second plug-in arm are respectively inserted into one of the plug-in slots.

5. The battery device according to claim 1, wherein: The connector includes a connecting terminal, which includes a terminal body and a crimping portion. The crimping portion is connected to the terminal body and encloses a crimping groove. The connecting portion is inserted into the crimping groove and the crimping portion is crimped onto the connecting portion.

6. The battery device according to claim 5, characterized in that The crimping portion includes a crimping section and a tip section. The terminal body, the crimping section and the tip section are sequentially connected and enclosed to form the crimping groove. The tip section pierces and is crimped onto the connecting portion.

7. The battery device according to claim 6, characterized in that: The terminal body has a first edge and a second edge that are arranged opposite to each other along a width direction thereof, and the first edge and the second edge are respectively provided with at least one crimping portion.

8. The battery device according to any one of claims 1 to 7, characterized in that: The circuit board body includes a first flexible segment and a second flexible segment, the first flexible segment and the second flexible segment are connected by at least one folding portion, the first flexible segment extends along the length direction of the flexible circuit board, the length direction of the second flexible segment intersects with the length direction of the first flexible segment, and part of the second flexible segment is overlapped on the first flexible segment.

9. The battery device according to claim 8, characterized in that: The circuit board body also includes a third flexible segment, the third flexible segment and the second flexible segment are connected by at least one folding portion, the length direction of the third flexible segment is intersecting with the length direction of the first flexible segment, and at least part of the third flexible segment is overlapped on the second flexible segment.

10. The battery device according to claim 9, characterized in that The second flexible segment has a first stacking surface stacked with the first flexible segment and a second stacking surface stacked with the third flexible segment, and the first stacking surface and the second stacking surface are arranged on the second flexible segment in opposite directions.

11. The battery device according to claim 9, characterized in that: Along the length direction of the flexible circuit board, the connecting portion is arranged at an end of the third flexible segment away from the first flexible segment.

12. The battery device according to claim 9, characterized in that: A colloid is provided at the stacking position of the first flexible segment and the second flexible segment, and the colloid bonds the first flexible segment and the second flexible segment; And / or, a colloid is provided at the stacking position of the second flexible segment and the third flexible segment, and the colloid bonds the second flexible segment and the third flexible segment.

13. The battery device according to claim 12, characterized in that: A support member is provided at the stacking position of the first flexible segment and the second flexible segment, and the colloid is provided on a surface of the support member facing the first flexible segment and a surface of the support member facing the second flexible segment respectively; And / or, a support member is provided at the stacking position of the second flexible segment and the third flexible segment, and the colloid is provided on a surface of the support member facing the second flexible segment and a surface of the support member facing the third flexible segment, respectively.

14. The battery device according to claim 13, characterized in that: The support member is configured to be capable of generating compressive deformation along a thickness direction of the flexible circuit board.

15. A battery device, characterized in that: include: at least one battery cell; A flexible circuit board, comprising a circuit board body and a connecting portion, wherein the connecting portion is connected to the circuit board body, and at least part of the connecting portion is arranged on one side of the circuit board body along the width direction of the flexible circuit board; the circuit board body is connected to the battery cell to collect signals; the circuit board body has at least one folding portion, and the folding portion is configured to be able to extend along the length direction of the circuit board body to extend the length of the circuit board body; as well as A battery management system comprises a battery management circuit board, wherein the battery management circuit board has a welding portion, and the connecting portion is connected to the welding portion by welding.

16. An electrical device, characterized in that: The battery device comprises a battery device as claimed in any one of claims 1 to 15, wherein the battery device is used to store or provide electrical energy.

17. A flexible circuit board, characterized in that: include: A circuit board body, used to connect with a battery cell to collect signals, the circuit board body having at least one folding portion, the folding portion being configured to be able to extend along the length direction of the flexible circuit board to extend the length of the circuit board body; and A connecting portion, the connecting portion is connected to the circuit board body, and at least part of the connecting portion is arranged on one side of the circuit board body along the width direction of the flexible circuit board; the connecting portion is used to be plugged or crimped with a connector, or the connecting portion is used to be welded and connected to a battery management circuit board of a battery management system.

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