Battery device, battery sampling FPC and battery management system

Abstract

The embodiment of the application provides a battery device, a battery sampling FPC and a battery management system, the battery device comprises: a battery pack comprising a plurality of battery monomers; an FPC assembly arranged on the battery pack, the FPC assembly comprising a single-layer plate FPC and a connector, the FPC comprising a connector end and a plurality of sampling ends, the connector end being used for fixing the connector to the FPC, the plurality of sampling ends comprising a first sampling end, a second sampling end and a third sampling end, and being connected to a first pin, a second pin and a third pin of the connector end through a wire respectively, the first pin being adjacent to the third pin and the second pin being not adjacent to the third pin. The battery device, the battery sampling FPC and the battery management system provided by the application can make the potential difference between the adjacent pins of the connector end of the FPC single-layer plate meet the preset voltage, and reduce the cost of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device, a battery sampling FPC, and a battery management system. Background Technology

[0002] Due to their advantages such as high energy density, rechargeability, safety, and environmental friendliness, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0003] During battery use, sampling devices are typically used to sample information such as voltage and temperature of individual battery cells. This allows for more effective monitoring of the battery based on the sampled information, thereby improving battery performance and lifespan.

[0004] Currently, flexible printed circuit (FPC) technology is maturing and is being used more and more in the field of battery module data acquisition. The connectors on the FPC require that the voltage difference between their pins meet the connector's allowable operating voltage. For example, if the voltage difference between adjacent pins exceeds the connector's allowable operating voltage, sampling will fail, and the FPC will be rendered unusable. Utility Model Content

[0005] This application provides a battery device, a battery sampling FPC, and a battery management system. The potential difference collected by the sampling terminal between adjacent pins connected to the connector end on a single-layer FPC meets a preset voltage, such as the allowable operating voltage between adjacent pins of the connector, which can reduce the cost of the battery device.

[0006] In a first aspect, a battery device is provided, comprising: a battery pack including a plurality of battery cells; and an FPC assembly disposed on the battery pack, the FPC assembly including a single-layer FPC and a connector, the FPC including a connector end and a plurality of sampling ends, the connector end being used to fix the connector to the FPC, the plurality of sampling ends including a first sampling end, at least one second sampling end and a third sampling end, the first sampling end, the second sampling end and the third sampling end being respectively connected to a first pin, a second pin and a third pin of the connector end via wiring, the first pin and the third pin being adjacent and the second pin and the third pin being not adjacent, the potential difference collected between the first sampling end and the third sampling end satisfying a preset voltage, the potential difference collected between the second sampling end and the third sampling end exceeding the preset voltage, and at least one second sampling end being disposed adjacent to one side or both sides of the third sampling end along the circumference of the FPC.

[0007] In this embodiment, at least one second sampling terminal, whose potential difference with the third sampling terminal cannot meet the preset voltage (such as the operating voltage allowed by adjacent pins of the connector), is adjacent to one or both sides of the third sampling terminal along the circumferential direction of the FPC. On the single-layer FPC, traces connect the first sampling terminal to the first pin of the connector, at least one second sampling terminal to at least one second pin of the connector, and the third sampling terminal to the third pin of the connector. The first and third pins are adjacent, while the second and third pins are not adjacent. This arrangement ensures that the pins of the connector connected to the first sampling terminal are adjacent to the pins of the connector connected to the third sampling terminal, and that the pins of the connector connected to at least one second sampling terminal are not adjacent to the pins of the connector connected to the third sampling terminal. This allows the potential difference between the sampling terminals connected to adjacent pins of the connector connected to the third sampling terminal to meet the preset voltage (such as the operating voltage allowed by adjacent pins of the connector) on the single-layer FPC, thereby reducing the cost of the battery device.

[0008] In one possible implementation, in the FPC, the traces of at least one sampling terminal and the connector terminal bypass the outside of at least one other sampling terminal, wherein the first sampling terminal, at least one second sampling terminal, and the third sampling terminal include at least one sampling terminal and at least one other sampling terminal.

[0009] In this embodiment of the application, by setting at least one sampling terminal and connector terminal trace in the FPC to bypass the outside of at least one other sampling terminal, it is possible to achieve that the first pin of the connector terminal connected to the first sampling terminal is adjacent to the third pin of the connector terminal connected to the third sampling terminal, and that the second pin of the connector terminal connected to the second sampling terminal is not adjacent to the third pin of the connector terminal connected to the third sampling terminal. This enables the potential difference between the sampling terminals connected to adjacent pins of the connector terminal to meet a preset voltage, such as the operating voltage allowed by the adjacent pins of the connector, on the FPC single-layer board, thereby reducing the cost of the battery device.

[0010] In one possible implementation, in the FPC, the trace between the first sampling end and the connector end bypasses the outside of at least one second sampling end, or the trace between at least one second sampling end and the connector end bypasses the outside of the first sampling end, wherein, along the circumference of the FPC, the first sampling end and at least one second sampling end are both disposed on one side of the third sampling end and at least one second sampling end is disposed adjacent to the first sampling end and the third sampling end.

[0011] In the embodiments of this application, by routing the trace between the first sampling terminal and the connector terminal around the outside of at least one second sampling terminal, or by routing the trace between at least one second sampling terminal and the connector terminal around the outside of the first sampling terminal, the potential difference between the sampling terminals connected to the connector terminal can be made to meet a preset voltage, such as the operating voltage allowed by the adjacent pins of the connector, on the FPC single-layer board, which can reduce the cost of the battery device.

[0012] In one possible implementation, in the FPC, the trace between the third sampling terminal and the connector terminal bypasses the outside of the first sampling terminal and at least one second sampling terminal, or the traces between the first sampling terminal and at least one second sampling terminal and the connector terminal bypass the outside of the third sampling terminal, wherein, along the circumference of the FPC, the first sampling terminal and at least one second sampling terminal are both disposed on one side of the third sampling terminal and at least one second sampling terminal is disposed adjacent to a first sampling terminal and a third sampling terminal.

[0013] In this embodiment, by routing the third sampling terminal and the connector terminal from the outside of the first sampling terminal and at least one second sampling terminal, or by routing the first sampling terminal and at least one second sampling terminal to the connector terminal from the outside of the third sampling terminal, the potential difference between the sampling terminals connected to the connector terminal on the FPC single-layer board can meet the preset voltage, such as the operating voltage allowed by the adjacent pins of the connector. This can reduce the cost of the battery device and reduce the length of a single trace, which is convenient for the layout of the traces.

[0014] In one possible implementation, in the FPC, the trace between one first sampling terminal and the connector terminal bypasses the outside of M second sampling terminals, and the trace between another first sampling terminal and the connector terminal bypasses the outside of N second sampling terminals. Alternatively, the traces between the M second sampling terminals and the connector terminal bypass the outside of one first sampling terminal, and the traces between the N second sampling terminals and the connector terminal bypass the outside of another first sampling terminal. In this case, at least one second sampling terminal includes M second sampling terminals and N second sampling terminals. Along the circumference of the FPC, the M second sampling terminals and N second sampling terminals are respectively arranged adjacent to each other on both sides of a third sampling terminal. The M second sampling terminals are arranged adjacent to each other between one first sampling terminal and a third sampling terminal, and the N second sampling terminals are arranged adjacent to each other between another first sampling terminal and a third sampling terminal.

[0015] In this embodiment, the trace between one first sampling terminal and the connector terminal bypasses the outside of M second sampling terminals and the trace between another first sampling terminal and the connector terminal bypasses the outside of N second sampling terminals. Alternatively, the traces between the M second sampling terminals and the connector terminal bypass the outside of one first sampling terminal and the traces between the N second sampling terminals and the connector terminal bypass the outside of another first sampling terminal. This allows the potential difference between the sampling terminals connected to the connector terminal on the FPC single-layer board to meet a preset voltage, such as the operating voltage allowed by the adjacent pins of the connector, thereby reducing the cost of the battery device.

[0016] In one possible implementation, in the FPC, the trace between the third sampling end and the connector end bypasses the outside of the M second sampling ends, wherein at least one second sampling end includes M second sampling ends and N second sampling ends. Along the circumference of the FPC, the M second sampling ends and N second sampling ends are respectively arranged adjacent to each other on both sides of the third sampling end, and the M second sampling ends are arranged adjacent to each other between the first sampling end and the third sampling end.

[0017] In this embodiment, along the circumference of the FPC, M second sampling terminals and N second sampling terminals are respectively arranged adjacently on both sides of the third sampling terminal, and the M second sampling terminals are arranged adjacently between the first sampling terminal and the third sampling terminal. By routing the trace between the third sampling terminal and the connector terminal around the outside of the M second sampling terminals, the potential difference between the sampling terminals connected to the connector terminal can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector, on the FPC single-layer board. This can reduce the cost of the battery device and simplify the winding method.

[0018] In one possible implementation, in the FPC, the trace between the first sampling end and the connector end bypasses the outside of the third sampling end, or the trace between the third sampling end and the connector end bypasses the outside of the first sampling end, wherein, along the circumference of the FPC, the first sampling end and at least one second sampling end are respectively disposed adjacent to each other on one side and the other side of the third sampling end.

[0019] In this embodiment of the application, by routing the trace between the first sampling terminal and the connector terminal from the outside of the third sampling terminal, or by routing the trace between the third sampling terminal and the connector terminal from the outside of the first sampling terminal, the potential difference between the sampling terminals connected to the connector terminal can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector, on the FPC single-layer board. This can reduce the cost of the battery device and simplify the routing method.

[0020] In one possible implementation, the FPC is provided with a first opening, a second opening, and a third opening. The first opening is located inside the voltage sampling terminal along a first direction. The second and third openings are respectively located on the edge of the FPC along a second direction and close to one of the voltage sampling terminals. The second and third openings are respectively located on both sides of a voltage sampling terminal along the second direction. The first sampling terminal, at least one second sampling terminal, and the third sampling terminal include the voltage sampling terminal.

[0021] In this embodiment of the application, by providing a first opening, a second opening and a third opening around the voltage sampling terminal, the stress impact of FPC deformation caused by the expansion of the battery cell volume on the voltage sampling terminal, such as its solder pads, is reduced, thereby reducing the risk of solder joint tearing at the voltage sampling terminal.

[0022] In one possible implementation, at least one additional sampling end includes a voltage sampling end, and at least one sampling end and connector end traces extend from one of the at least one sampling end and connector end to between a first opening and a second opening of the voltage sampling end, and around the voltage sampling end again to between the first opening and the second opening in the area surrounded by the first opening, the second opening and the third opening, and extend to the other of the at least one sampling end and connector end, wherein the distance between the first opening and the third opening is less than or equal to a preset distance and the distance between the first opening and the second opening is greater than a preset distance.

[0023] In this embodiment of the application, when the sampling end to which the wire is wound includes a voltage sampling end, and the distance between the first opening and the third opening of the voltage sampling end is less than or equal to a preset distance and the distance between the first opening and the second opening is greater than a preset distance, the trace between at least one sampling end and the connector end can enter the area surrounded by the opening from one of them through the area between the first opening and the second opening, and after wrapping around the voltage sampling end in the other at least one sampling end, it extends out through the area between the first opening and the second opening, and then connects to the other of the at least one sampling end and the connector end. In this way, the potential difference between the sampling ends connected to the adjacent pins of the connector end on the FPC single-layer board meets the preset voltage, such as the working voltage allowed by the adjacent pins of the connector, which can reduce the cost of the FPC and thus reduce the cost of the battery device.

[0024] In one possible implementation, the number of at least one sampling end is less than or equal to 3.

[0025] In this embodiment of the application, by setting the number of at least one sampling end to be less than or equal to 3, it is possible to arrange at least one sampling end and connector end in the space outside the first direction of the sampling end of the winding.

[0026] In one possible implementation, the FPC includes a first flat plate portion, a second flat plate portion, and a bending portion. The first flat plate portion is connected to the second flat plate portion through the bending portion. A portion of the first sampling end, the second sampling end, and the third sampling end is disposed in one of the first flat plate portion and the second flat plate portion, and the other portion is disposed in the other flat plate portion of the first flat plate portion and the second flat plate portion.

[0027] In this embodiment, by placing a portion of the first sampling terminal, at least one second sampling terminal, and a third sampling terminal on one of the first and second plate portions, and placing the other portion on the other plate portion, the pins of the connector end connected to the first sampling terminal are adjacent to the pins of the connector end connected to the third sampling terminal, and the pins of the connector end connected to at least one second sampling terminal are not adjacent to the pins of the connector end connected to the third sampling terminal. This allows the potential difference between the sampling terminals connected to adjacent pins of the connector end to meet a preset voltage, such as the allowable operating voltage of adjacent pins of the connector, on the FPC single-layer board. This reduces the cost of the FPC and, consequently, the cost of the battery device.

[0028] In one possible implementation, the third sampling end is disposed in one of the first plate portion and the second plate portion, and the first sampling end and N second sampling ends are disposed in the other plate portion of the first plate portion and the second plate portion.

[0029] In this embodiment of the application, by setting the third sampling end in one of the first and second plate sections, and setting at least one second sampling end and the first sampling end in the other plate section, it is possible to ensure that the potential difference between the sampling ends connected to the connector end on the FPC single-layer board meets the preset voltage, such as the working voltage allowed by the adjacent pins of the connector. This can reduce the cost of the FPC and thus reduce the cost of the battery device.

[0030] In one possible implementation, the first sampling end and the third sampling end are disposed in one of the first plate portion and the second plate portion, and at least one second sampling end is disposed in the other plate portion of the first plate portion and the second plate portion.

[0031] In this embodiment of the application, by setting the third sampling end and the first sampling end in one of the first plate portion and the second plate portion, and setting at least one second sampling end in the other plate portion of the first plate portion and the second plate portion, it is possible to achieve a potential difference between the sampling ends connected to the connector end on the FPC single-layer board that meets the preset voltage, such as the working voltage allowed by the adjacent pins of the connector, thereby reducing the cost of the FPC and thus reducing the cost of the battery device.

[0032] In one possible implementation, at least one second sampling end and a third sampling end are disposed in one of the first plate portion and the second plate portion, and the first sampling end is disposed in the other plate portion of the first plate portion and the second plate portion. In this case, along the circumferential direction of the FPC, at least one second sampling end is disposed adjacent to one side of the third sampling end. Alternatively, at least one second sampling end includes M second sampling ends and N second sampling ends. Along the circumferential direction of the FPC, the M second sampling ends and the N second sampling ends are respectively disposed adjacent to both sides of the third sampling end. The M second sampling ends are disposed adjacent to one first sampling end and the third sampling end, and the N second sampling ends are disposed adjacent to another first sampling end and the third sampling end.

[0033] In this embodiment of the application, by setting the third sampling terminal and at least one second sampling terminal in one of the first and second plate portions, and setting the first sampling terminal in the other plate portion, it is possible to ensure that the potential difference between the sampling terminals connected to the connector end on the FPC single-layer board meets the preset voltage, such as the working voltage allowed by the adjacent pins of the connector. This can reduce the cost of the FPC and thus reduce the cost of the battery device.

[0034] In one possible implementation, the first plate portion is disposed outside the second plate portion, the second plate portion is disposed outside the battery pack, and the connector end is disposed outside the first plate portion.

[0035] In this embodiment, the first plate portion is disposed outside the second plate portion, the second plate portion is disposed outside the battery pack, and the connector end is disposed outside the first plate portion. In this way, the connector can face the outside of the battery device, which can reduce the impact of the connector on the assembly when the FPC and the battery pack are assembled.

[0036] Secondly, a single-layer FPC is provided, comprising: a connector end for fixing a connector to the FPC; and multiple sampling ends, including a first sampling end, at least one second sampling end, and a third sampling end. The first sampling end, the second sampling end, and the third sampling end are respectively connected to a first pin, a second pin, and a third pin of the connector end via traces. The first pin and the third pin are adjacent to each other, while the second pin and the third pin are not adjacent to each other. The potential difference collected between the first sampling end and the third sampling end meets a preset voltage, and the potential difference collected between the second sampling end and the third sampling end exceeds the preset voltage. At least one second sampling end is disposed adjacent to one side or both sides of the third sampling end along the circumference of the FPC.

[0037] In one possible implementation, the traces of at least one sampling terminal and the connector terminal bypass the outside of at least one other sampling terminal, wherein the first sampling terminal, at least one second sampling terminal, and the third sampling terminal include at least one sampling terminal and at least one other sampling terminal.

[0038] In one possible implementation, the trace between the first sampling end and the connector end bypasses the outside of at least one second sampling end, or the trace between at least one second sampling end and the connector end bypasses the outside of the first sampling end, wherein, along the circumference of the FPC, the first sampling end and at least one second sampling end are both disposed on one side of the third sampling end and at least one second sampling end is disposed adjacent to the first sampling end and the third sampling end.

[0039] In one possible implementation, the trace between the third sampling terminal and the connector terminal bypasses the outside of the first sampling terminal and at least one second sampling terminal, or the trace between the first sampling terminal and at least one second sampling terminal and the connector terminal bypasses the outside of the third sampling terminal, wherein, along the circumferential direction of the FPC, the first sampling terminal and at least one second sampling terminal are both disposed on one side of the third sampling terminal and at least one second sampling terminal is disposed adjacent to a first sampling terminal and a third sampling terminal.

[0040] In one possible implementation, the trace between one first sampling terminal and the connector terminal bypasses the outside of M second sampling terminals, and the trace between another first sampling terminal and the connector terminal bypasses the outside of N second sampling terminals. Alternatively, the traces between the M second sampling terminals and the connector terminal bypass the outside of one first sampling terminal, and the traces between the N second sampling terminals and the connector terminal bypass the outside of another first sampling terminal. In this case, at least one second sampling terminal includes M second sampling terminals and N second sampling terminals. Along the circumference of the FPC, the M second sampling terminals and N second sampling terminals are respectively arranged adjacent to each other on both sides of the third sampling terminal. The M second sampling terminals are arranged adjacent to each other between one first sampling terminal and the third sampling terminal, and the N second sampling terminals are arranged adjacent to each other between another first sampling terminal and the third sampling terminal.

[0041] In one possible implementation, the trace between the third sampling end and the connector end bypasses the outside of the M second sampling ends, wherein at least one second sampling end includes M second sampling ends and N second sampling ends. Along the circumference of the FPC, the M second sampling ends and N second sampling ends are respectively arranged adjacent to each other on both sides of the third sampling end, and the M second sampling ends are arranged adjacent to each other between the first sampling end and the third sampling end.

[0042] In one possible implementation, the trace between the first sampling end and the connector end bypasses the outside of the third sampling end, or the trace between the third sampling end and the connector end bypasses the outside of the first sampling end, wherein, along the circumference of the FPC, the first sampling end and at least one second sampling end are respectively disposed adjacent to each other on one side and the other side of the third sampling end.

[0043] In one possible implementation, the trace between at least one second sampling terminal and the connector terminal bypasses the outside of the first sampling terminal and the third sampling terminal, or the traces between the first sampling terminal and the third sampling terminal and the connector terminal bypass the outside of at least one second sampling terminal, wherein, along the circumferential direction of the FPC, the first sampling terminal and at least one second sampling terminal are respectively disposed adjacent to each other on one side and the other side of the third sampling terminal.

[0044] In one possible implementation, the FPC is provided with a first opening, a second opening, and a third opening. The first opening is located inside the voltage sampling terminal along a first direction. The second and third openings are respectively located on the edge of the FPC along a second direction and close to one of the voltage sampling terminals. The second and third openings are respectively located on both sides of a voltage sampling terminal along the second direction. The first sampling terminal, at least one second sampling terminal, and the third sampling terminal include voltage sampling terminals.

[0045] In one possible implementation, at least one additional sampling end includes a voltage sampling end, and at least one sampling end and connector end traces extend from one of the at least one sampling end and connector end to between a first opening and a second opening of the voltage sampling end, and around the voltage sampling end again to between the first opening and the second opening in the area surrounded by the first opening, the second opening and the third opening, and extend to the other of the at least one sampling end and connector end, wherein the distance between the first opening and the third opening is less than or equal to a preset distance and the distance between the first opening and the second opening is greater than a preset distance.

[0046] In one possible implementation, the number of at least one sampling end is less than or equal to 3.

[0047] In one possible implementation, the FPC includes a first flat plate portion, a second flat plate portion, and a bending portion. The first flat plate portion is connected to the second flat plate portion through the bending portion. A portion of the first sampling end, the second sampling end, and the third sampling end is disposed in one of the first flat plate portion and the second flat plate portion, and the other portion is disposed in the other flat plate portion of the first flat plate portion and the second flat plate portion.

[0048] In one possible implementation, the third sampling end is disposed in one of the first plate portion and the second plate portion, and the first sampling end and at least one second sampling end are disposed in the other plate portion of the first plate portion and the second plate portion.

[0049] In one possible implementation, the first sampling end and the third sampling end are disposed in one of the first plate portion and the second plate portion, and N second sampling ends are disposed in the other plate portion of the first plate portion and the second plate portion.

[0050] In one possible implementation, at least one second sampling end and a third sampling end are disposed in one of the first plate portion and the second plate portion, and the first sampling end is disposed in the other plate portion of the first plate portion and the second plate portion. In this case, along the circumferential direction of the FPC, at least one second sampling end is disposed adjacent to one side of the third sampling end. Alternatively, at least one second sampling end includes M second sampling ends and N second sampling ends. Along the circumferential direction of the FPC, the M second sampling ends and the N second sampling ends are respectively disposed adjacent to both sides of the third sampling end. The M second sampling ends are disposed adjacent to one first sampling end and the third sampling end, and the N second sampling ends are disposed adjacent to another first sampling end and the third sampling end.

[0051] In one possible implementation, the first plate portion is disposed outside the second plate portion, the second plate portion is disposed outside the battery pack, and the connector end is disposed outside the first plate portion.

[0052] Thirdly, a battery management system is provided, which includes the battery sampling FPC in the second aspect or any possible implementation of the second aspect described above.

[0053] Fourthly, an energy storage device is provided, which includes the battery device described in the first aspect or any possible implementation of the first aspect. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application.

[0055] Figure 2 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0056] Figure 3 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0057] Figure 4 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0058] Figure 5 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0059] Figure 6 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0060] Figure 7 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0061] Figure 8 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0062] Figure 9 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0063] Figure 10 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0064] Figure 11 This is a schematic diagram of the structure of the FPC component provided in an embodiment of this application.

[0065] Figure 12 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0066] Figure 13 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0067] Figure 14 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0068] Figure 15 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0069] Figure 16 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0070] Figure 17 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0071] Figure 18 This is a schematic diagram of the structure of the FPC provided in an embodiment of this application.

[0072] Figure Labels

[0073] Battery assembly: 1. Battery pack: 2. Battery cell: 20. FPC assembly: 3. FPC: 31. Connector end: 311. First sampling end: 312. Second sampling end: 313. Third sampling end: 314. Fourth sampling end: 315. First opening: 316. Second opening: 317. Third opening: 318. Connector: 32. Nickel sheet: 4. First flat plate part: 151. Bending part: 152. Third flat plate part: 153. Detailed Implementation

[0074] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0075] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application, are intended to cover non-exclusive inclusion.

[0076] The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this text generally indicates that the preceding and following related objects have an "or" relationship.

[0077] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0078] In this application, the terms "upper," "lower," "left," "right," "inner," and "outer," indicating orientation or positional relationships, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0079] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0080] Due to their advantages such as high energy density, rechargeability, safety, and environmental friendliness, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0081] During battery use, sampling devices are typically used to sample information such as voltage and temperature of individual battery cells. This allows for more effective monitoring of the battery based on the sampled information, thereby improving battery performance and lifespan.

[0082] Currently, flexible printed circuit (FPC) technology is maturing and is being used more and more in the field of battery module data acquisition. The connectors on the FPC require that the voltage difference between their pins meet the connector's allowable operating voltage. For example, if the voltage difference between adjacent pins exceeds the connector's allowable operating voltage, sampling will fail, and the FPC will be rendered unusable.

[0083] Based on the above problems, this application provides a battery device, a battery sampling FPC, and a battery management system. The battery device includes: a battery pack, including multiple battery cells; and an FPC assembly disposed on the battery pack. The FPC assembly includes a single-layer FPC and a connector. The FPC includes a connector end and multiple sampling ends. The connector end is used to fix the connector to the FPC. The multiple sampling ends include a first sampling end, at least one second sampling end, and a third sampling end. The first sampling end, the second sampling end, and the third sampling end are respectively connected to a first pin, a second pin, and a third pin of the connector end through wiring. The first pin and the third pin are adjacent, and the second pin and the third pin are not adjacent. The potential difference collected between the first sampling end and the third sampling end meets a preset voltage, and the potential difference collected between the second sampling end and the third sampling end exceeds the preset voltage. At least one second sampling end is disposed adjacent to one side or both sides of the third sampling end along the circumference of the FPC.

[0084] In this embodiment of the application, the potential difference between the sampling terminals connected to the connector end can be made to meet the preset voltage, such as the operating voltage allowed by the adjacent pins of the connector, on the FPC single-layer board, which can reduce the cost of the battery device.

[0085] The following combination Figures 1 to 18 The battery device 1 provided in the embodiments of this application will be described by way of example.

[0086] like Figure 1 and Figure 2 As shown, the battery device 1 includes a battery pack 2 and an FPC assembly 3.

[0087] Battery pack 2 includes multiple battery cells 20.

[0088] FPC assembly 3 is disposed on battery pack 2. FPC assembly 3 includes a single-layer FPC 31 and a connector 32.

[0089] FPC 31 includes connector end 311 and multiple sampling ends.

[0090] Connector end 311 is used to secure the connector to the FPC.

[0091] The multiple sampling terminals include a first sampling terminal 312, at least one second sampling terminal 313 and a third sampling terminal 314. The first sampling terminal 312, the second sampling terminal 313 and the third sampling terminal 314 are respectively connected to the first pin, the second pin and the third pin of the connector terminal 311 through wiring. The first pin and the third pin are adjacent to each other and the second pin and the third pin are not adjacent to each other.

[0092] The potential difference collected between the first sampling terminal 312 and the third sampling terminal 314 meets the preset voltage, while the potential difference collected between the second sampling terminal 313 and the third sampling terminal 314 exceeds the preset voltage.

[0093] At least one second sampling end 313 is disposed adjacent to one or both sides of the third sampling end 314 along the circumference of the FPC 31.

[0094] FPC component 3 is installed on battery pack 2 and is used to collect voltage information of battery pack 2.

[0095] Optionally, the FPC component 3 is disposed on the battery pack 2 and can also be used to collect temperature information of the battery pack 2.

[0096] For example, the first sampling terminal 312 and the second sampling terminal 313 are voltage sampling terminals, which can be used to collect voltage information of battery pack 2. The third sampling terminal 314 is a temperature sampling terminal, which can be used to collect temperature information of battery pack 2.

[0097] The multiple sampling terminals of the FPC may include only the first sampling terminal 312, the second sampling terminal 313, and the third sampling terminal 314 mentioned above.

[0098] Optionally, the multiple sampling terminals of FPC 31 can also have other sampling terminals, such as a fourth sampling terminal 315.

[0099] As an example, the voltage of all individual cells in battery pack 2 can be sampled. Alternatively, only a subset of individual cells in battery pack 2 can be sampled.

[0100] As an example, voltage and temperature sampling within a battery pack 2 can be performed using one FPC component 3, or multiple FPC components 3.

[0101] The number of voltage sampling terminals can be set according to the number of individual battery cells within a battery pack 2 that require voltage sampling. Similarly, the number of temperature sampling terminals can be set according to the number of temperature sampling points within a battery pack 2. These voltage and temperature sampling terminals can be set on a single FPC, or multiple FPCs 31. For example, Figure 1 The FPC component 3 shown may include four voltage sampling terminals and one temperature sampling terminal.

[0102] The voltage sampling terminal can be connected to the battery cell that needs to be sampled. As an example, the voltage sampling terminal may include a voltage sampling pad, which is connected to a nickel plate 4, such as by soldering. The nickel plate 4 can be connected to the electrode of the battery cell, such as by connecting to the busbar of the battery cell.

[0103] The temperature sampling terminal can be connected to a temperature sensor set on the battery pack 2. As an example, the temperature sampling terminal may include a temperature sampling pad, which can be connected to a temperature sensor such as a negative temperature coefficient (NTC) temperature sensor set at the temperature sampling point. The routing between the temperature sampling terminal and the connector terminal 311 includes positive and negative routing. One end of the positive routing is connected to one pin of the connector terminal 311, and the other end extends to the temperature sampling terminal and is connected to one end of the temperature sensor. One end of the negative routing is connected to another pin of the connector terminal 311, and the other end extends to the temperature sampling terminal and is connected to the other end of the temperature sensor.

[0104] For ease of sampling, voltage sampling terminals are typically located on or near the individual battery cell being sampled, such as on the cell's busbar. Temperature sampling terminals are typically located on or near the temperature sensor. Therefore, if the locations of the battery cell being sampled and the temperature sensor are determined, the locations of the voltage and temperature sampling terminals on the FPC 31 are also determined. For example, Figure 2 As shown, along the circumference of FPC 31, there are voltage sampling terminals such as a first sampling terminal 312, two second sampling terminals 313, a temperature sampling terminal such as a third sampling terminal 314, and a voltage sampling terminal such as a fourth sampling terminal 315.

[0105] In this embodiment, at least one second sampling end 313 is disposed adjacent to one or both sides of the third sampling end 314 along the circumference of the FPC 31. This can be either at least one second sampling end 313 disposed adjacent to one side of the third sampling end 314 along the circumference of the FPC 31, or multiple second sampling ends 313 can be disposed adjacent to both sides of the third sampling end 314 along the circumference of the FPC 31. The number of second sampling ends 313 disposed adjacent to one or both sides of the third sampling end 314 along the circumference of the FPC 31 can be one or more. When multiple second sampling ends 313 are disposed adjacent to any side of the third sampling end 314 along the circumference of the FPC 31, the multiple second sampling ends 313 are disposed as a whole adjacent to the third sampling end 314.

[0106] Multiple sampling terminals on the FPC 31 are located near the edge of the FPC 31 board.

[0107] The circumferential direction of FPC 31 refers to the direction along the edge of the FPC 31.

[0108] Battery pack 2 typically includes multiple battery cells connected in series. From the negative terminal to the positive terminal of battery pack 2, as the number of battery cells connected in series increases, the potential collected at the positive terminal of each battery cell, such as its busbar, will gradually increase.

[0109] Due to circuit design, the potentials of sampling terminals located close to each other may differ significantly. For example, FPC component 3 is connected to a data acquisition chip via connector 32. The data acquisition chip can acquire the potentials of the voltage and temperature sampling terminals on the FPC. The potential acquired by the temperature sampling terminal depends on the lowest potential acquired by the data acquisition chip connected to it via connector 32. The potential acquired by the negative terminal (connected to the negative trace) of this temperature sampling terminal is equal to the lowest potential of the data acquisition chip, while the potential acquired by the positive terminal (connected to the positive trace) differs from the potential of its negative terminal by approximately 3V to 4V. That is, the potential of the temperature sampling terminal is close to or equal to the potential of the voltage sampling terminal with the lowest acquired potential.

[0110] This could result in a large difference between the potential sampled by the temperature sampling terminal and the potential sampled by its adjacent voltage sampling terminal, while the potential difference between the temperature sampling terminal and other voltage sampling terminals located further away might be smaller. For example, Figure 2 As shown, the potential difference between some voltage sampling terminals, such as the first sampling terminal 312 and the fourth sampling terminal 315, and the potential difference between the temperature sampling terminals, such as the third sampling terminal 314, is small, which can meet the preset voltage, such as the working voltage allowed by the adjacent pins of connector 32; while the potential difference between other voltage sampling terminals, such as the second sampling terminal 313, and the potential difference between the temperature sampling terminals, such as the third sampling terminal 314, is large, exceeding the preset voltage, such as the working voltage allowed by the adjacent pins of connector 32.

[0111] For battery cells that are closely connected in series, the corresponding potential difference is small, and this difference meets the preset voltage, such as the allowable operating voltage of adjacent pins of connector 32. Furthermore, the sampling terminals on the FPC corresponding to these closely connected battery cells will also be relatively close. For example, in... Figure 2 In this process, the potential difference collected by the first sampling terminal 312, the second voltage sampling terminal 313, and the fourth sampling terminal 315 all meet the operating voltage allowed by the adjacent pins of the preset voltage connector 32.

[0112] If the voltage between adjacent pins exceeds the allowable operating voltage of adjacent pins of connector 32, connector 32 is at risk of damage.

[0113] Therefore, in this embodiment, the first sampling terminal 312 is connected to the first pin of the connector terminal 311 via a trace, the second sampling terminal 313 is connected to the second pin of the connector terminal 311 via traces, and the third sampling terminal 314 is connected to the third pin of the connector terminal 311 via a trace. The first pin and the third pin are adjacent to each other, and the second pin and the third pin are not adjacent to each other.

[0114] like Figure 2 As shown, along the first direction, from top to bottom, the pin numbers of connector end 311 are 1 to 6. The second sampling end 313 is connected to pins 1 and 2 of connector end 311, the first sampling end 312 is connected to pin 3 of connector end 311, the third sampling end 314 is connected to pins 4 and 5 of connector end 311, and the fourth sampling end 315 is connected to pin 6 of connector end 311.

[0115] In this way, the pin of the third sampling terminal 314 connected to the connector terminal 311 can be adjacent to the pin of the first sampling terminal 312 connected to the connector terminal 311, and the pin of the third sampling terminal 314 connected to the connector terminal 311 can be non-adjacent to the pin of the second sampling terminal 313.

[0116] It should be understood that, in the embodiments of this application, the potential difference collected between the second sampling terminal 313 and the third sampling terminal 314 does not meet the preset voltage. This can mean that the potential collected by the second sampling terminal 313 is greater than the potential collected by the third sampling terminal 314 and the difference between the two exceeds the preset voltage, or it can mean that the potential collected by the third sampling terminal 314 is greater than the potential of the second sampling terminal 313 and the difference between the two exceeds the preset voltage.

[0117] The potential difference acquired between the first sampling terminal 312 and the third sampling terminal 314 satisfies the preset voltage. This can mean that the potential acquired by the first sampling terminal 312 is greater than the potential acquired by the third sampling terminal 314 and the difference between the two satisfies the preset voltage; or it can mean that the potential acquired by the third sampling terminal 314 is greater than the potential acquired by the first sampling terminal 312 and the difference between the two satisfies the preset voltage; or it can mean that the potential acquired by the first sampling terminal 312 is equal to the potential acquired by the third sampling terminal 314.

[0118] The preset voltage can be a range, determined based on the allowable voltages of adjacent pins of the connector. For example, the preset voltage is equal to the allowable voltages of adjacent pins of connector 32. The allowable operating voltage of adjacent pins of connector 32 is typically a range, such as 0~20V. If the potential difference between the sampling terminals is within this range, such as 5V, then the allowable operating voltage of adjacent pins of connector 32 is met; if the potential difference between the sampling terminals exceeds this range, such as 25V, then the allowable operating voltage of adjacent pins of connector 32 is exceeded or not met.

[0119] The FPC single-layer board structure is relatively simple, with only one layer of chemically etched conductive pattern. That is, only one side of the FPC31 can be used for wiring.

[0120] In this embodiment of the application, the types of the first sampling terminal 312, the second sampling terminal 313, and the third sampling terminal 314 are not limited. For example, the first sampling terminal 312, the second sampling terminal 313, and the third sampling terminal 314 can all be voltage sampling terminals.

[0121] In this embodiment, at least one second sampling terminal 313, whose potential difference with the third sampling terminal 314 cannot meet the preset voltage such as the working voltage allowed by the adjacent pin of the connector 32, is disposed adjacent to one or both sides of the third sampling terminal along the circumferential direction of the FPC. On the single-layer FPC 31, the first sampling terminal 312 is connected to the first pin of the connector terminal 311, at least one second sampling terminal 313 is connected to at least one second pin of the connector terminal 311, and the third sampling terminal 314 is connected to the third pin of the connector terminal 311. The first pin and the third pin are adjacent and the second pin and the third pin are not adjacent. In this way, the pins of the connector end 311 connected to the first sampling end 312 are adjacent to the pins of the connector end 311 connected to the third sampling end 314, and the pins of the connector end 311 connected to at least one second sampling end 313 are not adjacent to the pins of the connector end 311 connected to the third sampling end 314. This allows the potential difference between the sampling ends connected to the adjacent pins of the connector end 311 on the FPC31 single-layer board to meet the preset voltage, such as the operating voltage allowed by the adjacent pins of the connector 32, thereby reducing the cost of the battery device 1.

[0122] In some embodiments, such as Figures 2 to 10As shown, in FPC31, the traces of at least one sampling terminal and connector terminal 311 bypass the outer side of the other at least one sampling terminal along a first direction.

[0123] Among them, the first sampling end 312, the N second sampling ends 313 and the third sampling end 314 include at least one sampling end and at least one other sampling end.

[0124] In this embodiment, at least one sampling end can be a portion of the first sampling end 312, the second sampling end 313, and the third sampling end 314, and at least another sampling end can be another portion of the first sampling end 312, the second sampling end 313, and the third sampling end 314.

[0125] As an example, at least one sampling end can be a first sampling end 312, and at least another sampling end can be at least one second sampling end 313.

[0126] As an example, at least one sampling end can be a second sampling end 313, and at least another sampling end can be another second sampling end 313.

[0127] Bypassing from the outside of at least one other sampling end can be understood as bypassing from the outward end of the at least one other sampling end. A sampling end is typically located near one edge of the FPC31. One end of a sampling end is close to the edge of the FPC31 along a direction perpendicular to the edge, and the other end is away from the edge. The area between the end of the sampling end close to the edge of the FPC31 and the edge of the FPC31 can be considered as the outside of the sampling end along the first direction.

[0128] In this embodiment of the application, by setting at least one sampling terminal and the trace of connector terminal 311 in FPC31 to bypass the outside of at least one other sampling terminal, it is possible to make the first pin of connector terminal 311 connected to the first sampling terminal 312 adjacent to the third pin of connector terminal 311 connected to the third sampling terminal 314, and the second pin of connector terminal 311 connected to the second sampling terminal 313 not adjacent to the third pin of connector terminal 311 connected to the third sampling terminal 314. Thus, it is possible to make the potential difference between the sampling terminals connected to the adjacent pins of connector terminal 311 on the single-layer board of FPC31 meet the preset voltage, such as the working voltage allowed by the adjacent pins of connector 32, which can reduce the cost of battery device 1.

[0129] For ease of description, the battery device 1 of this application embodiment will be described using the following example: the first sampling terminal 312 and the second sampling terminal 313 are both voltage sampling terminals, and the third sampling terminal 314 is a temperature sampling terminal. Generally speaking, there is one trace between a voltage sampling terminal and the connector terminal 311, and there are two traces between a temperature sampling terminal and the connector terminal 311.

[0130] In some embodiments, such as Figure 2 As shown, the trace between the first sampling terminal 312 and the connector terminal 311 can be bypassed from the outside of at least one second sampling terminal 313.

[0131] In this configuration, along the circumference of the FPC 31, a first sampling end 312 and at least one second sampling end 313 are each disposed on one side of a third sampling end 314, with at least one second sampling end 313 being disposed adjacently between a first sampling end 312 and a third sampling end 314. That is, from one side of the FPC 31 to the other, the first sampling end, at least one second sampling end 313, and the third sampling end are arranged sequentially. Furthermore, when there are multiple second sampling ends 313, these multiple second sampling ends 313 are also arranged sequentially from one side of the FPC 31 to the other.

[0132] As an example, along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 6. At least one second sampling end 313 is connected to pins 1 and 2 of connector end 311, a first sampling end 312 is connected to pin 3 of connector end 311, a third sampling end 314 is connected to pins 4 and 5 of connector end 311, and a fourth sampling end 315 is connected to pin 6 of connector end 311.

[0133] It should be understood that, in the embodiments of this application, the pin numbers of the connector end 311 are only for indicating the relative positions of the pins. For example, the pin numbers of the connector end 311 can increase sequentially along the first direction, or they can decrease sequentially along the first direction.

[0134] In this embodiment, along the circumference of the FPC 31, the first sampling terminal 312 and at least one second sampling terminal 313 are both disposed on one side of the third sampling terminal 314, and at least one second sampling terminal 313 is disposed adjacent to one of the first sampling terminal 312 and the third sampling terminal 314. By routing the trace between the first sampling terminal 312 and the connector terminal 311 around the outside of at least one second sampling terminal 313, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, on the single-layer board of the FPC 31, which can reduce the cost of the battery device 1.

[0135] On the other hand, the routing that needs to be wound is the routing between the first sampling end 312 and the connector end 311. That is, the routing that goes around the outside of at least one second sampling end 313 along the first direction is only the routing of the first sampling end 312, which is suitable for cases where there are a large number of at least one second sampling end 313.

[0136] In some embodiments, such as Figure 3As shown, at least one trace between the second sampling terminal 313 and the connector terminal 311 can bypass the outside of the first sampling terminal 312.

[0137] Along the circumference of FPC 31, the first sampling end 312 and at least one second sampling end 313 are both disposed on one side of the third sampling end 314, and at least one second sampling end 313 is disposed adjacent to a first sampling end 312 and a third sampling end 314.

[0138] As an example, along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 6. At least one second sampling end 313 is connected to pins 1 and 2 of connector end 311, a first sampling end 312 is connected to pin 3 of connector end 311, a third sampling end is connected to pins 4 and 5 of connector end 311, and a fourth sampling end 315 is connected to pin 6 of connector end 311.

[0139] In this embodiment, along the circumference of the FPC 31, the first sampling terminal 312 and at least one second sampling terminal 313 are both disposed on one side of the third sampling terminal 314, and at least one second sampling terminal 313 is disposed adjacent to a first sampling terminal 312 and a third sampling terminal 314. By routing the trace between at least one second sampling terminal 313 and the connector terminal 311 around the outside of the first sampling terminal 312, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, on the single-layer board of the FPC 31. This can reduce the cost of the battery device 1 and reduce the length of a single trace, which facilitates the layout of the trace.

[0140] On the other hand, the routing that needs to be routed is the routing between at least one second sampling end 313 and the connector end 311. That is, the routing between at least one second sampling end 313 and the connector end 311 needs to be routed around the outside of the first sampling end 312. Usually, the gap of the first sampling end 312 along the outside of the first direction is relatively small, and the number of routing lines that can be allowed is limited. Therefore, this routing method is particularly suitable for situations where the number of at least one second sampling end 313 is relatively small.

[0141] In some embodiments, such as Figure 4 As shown, the traces of the third sampling terminal 314 and the connector terminal 311 can bypass the outside of the first sampling terminal 312 and at least one second sampling terminal 313.

[0142] Along the circumference of FPC31, the first sampling end 312 and at least one second sampling end 313 are both disposed on one side of the third sampling end 314, and at least one second sampling end 313 is disposed adjacent to the first sampling end 312 and the third sampling end 314.

[0143] As an example, along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 6. The third sampling end 314 is connected to pins 1 and 2 of connector end 311, the first sampling end 312 is connected to pin 3 of connector end 311, at least one second sampling end 313 is connected to pins 4 and 5 of connector end 311, and the fourth sampling end 315 is connected to pin 6 of connector end 311.

[0144] In this embodiment, along the circumference of the FPC 31, the first sampling terminal 312 and at least one second sampling terminal 313 are both disposed on one side of the third sampling terminal 314, and at least one second sampling terminal 313 is disposed adjacent to one of the first sampling terminal 312 and the third sampling terminal 314. By bypassing the trace between the third sampling terminal 314 and the connector terminal 311 from the outside of the first sampling terminal 312 and at least one second sampling terminal 313, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, on the single-layer board of the FPC 31, thereby reducing the cost of the battery device 1.

[0145] In some embodiments, such as Figure 5 As shown, the traces between the first sampling terminal 312 and at least one second sampling terminal 313 and the connector terminal 311 both bypass the outside of the third sampling terminal 314.

[0146] Along the circumference of FPC31, the first sampling end 312 and at least one second sampling end 313 are both disposed on one side of the third sampling end 314, and at least one second sampling end 313 is disposed adjacent to the first sampling end 312 and the third sampling end 314.

[0147] As an example, along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 6. The third sampling end 314 is connected to pins 1 and 2 of connector end 311, the first sampling end 312 is connected to pin 3 of connector end 311, at least one second sampling end 313 is connected to pins 4 and 5 of connector end 311, and the fourth sampling end 315 is connected to pin 6 of connector end 311.

[0148] In this embodiment, along the circumference of the FPC31, a first sampling terminal 312 and M second sampling terminals 313 are all disposed on one side of the third sampling terminal 314, and the M second sampling terminals 313 are disposed adjacently between the first sampling terminal 312 and the third sampling terminal 314. The traces between the first sampling terminal 312 and at least one second sampling terminal 313 and the connector terminal 311 are all bypassed from the outside of the third sampling terminal 314. This allows the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the single-layer board of the FPC31 to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32. This can reduce the cost of the FPC31, and thus reduce the cost of the battery device 1.

[0149] In some embodiments, such as Figure 6 As shown, in FPC 31, the trace between one first sampling terminal 312 and the connector terminal bypasses the outside of M second sampling terminals 313, and the trace between another first sampling terminal 312 and the connector terminal bypasses the outside of N second sampling terminals 313.

[0150] Among them, at least one second sampling end 313 includes M second sampling ends 313 and N second sampling ends 313. Along the circumference of FPC 31, the M second sampling ends 313 and N second sampling ends 313 are respectively arranged adjacently on both sides of the third sampling end 314. The M second sampling ends 313 are arranged adjacently between one first sampling end 312 and the third sampling end 314, and the N second sampling ends 313 are arranged adjacently between another first sampling end 312 and the third sampling end 314.

[0151] As an example, Figure 6 As shown, along the circumference of FPC 31, the two sides of the third sampling end 314 are respectively arranged adjacent to the two second sampling ends 313 and the third sampling end 314, and the two second sampling ends 313 are located between a first sampling end 312 and the third sampling end 314, and one second sampling end 313 is located between another first sampling end 312 and the third sampling end 314.

[0152] Along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 7. Two second sampling ends 313 are connected to pins 1 and 2 of connector end 311, a first sampling end 312 is connected to pin 3 of connector end 311, a third sampling end 314 is connected to pins 4 and 5 of connector end 311, another first sampling end 312 is connected to pin 6 of connector end 311, and a second sampling end 313 is connected to pin 7 of connector end 311.

[0153] In this embodiment, along the circumference of the FPC 31, M second sampling terminals 313 and N second sampling terminals 313 are respectively arranged adjacently on both sides of the third sampling terminal 314. The M second sampling terminals 313 are arranged adjacently between one first sampling terminal 312 and the third sampling terminal 314, and the N second sampling terminals 313 are arranged adjacently between another first sampling terminal 312 and the third sampling terminal 314. By routing the trace between one first sampling terminal 312 and the connector terminal from the outside of the M second sampling terminals 313, and routing the trace between another first sampling terminal 312 and the connector terminal from the outside of the N second sampling terminals 313, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the single-layer board of the FPC 31 can meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, which can reduce the cost of the battery device 1.

[0154] On the other hand, the routing that needs to be wound is the routing between the first sampling end 312 and the connector end 311. That is, the routing that goes around the outside of the second sampling end 313 is only the routing of the first sampling end 312. This is suitable for situations where there are a large number of second sampling ends 313 that need to be wound.

[0155] In some embodiments, such as Figure 7 As shown, the traces between the M second sampling terminals 313 and the connector terminal 311 bypass the outside of one first sampling terminal 312, and the traces between the N second sampling terminals 313 and the connector terminal 311 bypass the outside of another first sampling terminal 312.

[0156] Among them, at least one second sampling end 313 includes M second sampling ends 313 and N second sampling ends 313. Along the circumference of FPC 31, the M second sampling ends 313 and N second sampling ends 313 are respectively arranged adjacently on both sides of the third sampling end 314. The M second sampling ends 313 are arranged adjacently between one first sampling end 312 and the third sampling end 314, and the N second sampling ends 313 are arranged adjacently between another first sampling end 312 and the third sampling end 314.

[0157] As an example, Figure 7 As shown, along the circumference of FPC 31, the two sides of the third sampling end 314 are respectively arranged adjacent to the two second sampling ends 313 and the third sampling end 314, and the two second sampling ends 313 are located between a first sampling end 312 and the third sampling end 314, and one second sampling end 313 is located between another first sampling end 312 and the third sampling end 314.

[0158] Along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 7. Two second sampling ends 313 are connected to pins 1 and 2 of connector end 311, a first sampling end 312 is connected to pin 3 of connector end 311, a third sampling end 314 is connected to pins 4 and 5 of connector end 311, another first sampling end 312 is connected to pin 6 of connector end 311, and a second sampling end 313 is connected to pin 7 of connector end 311.

[0159] In this embodiment, along the circumference of the FPC 31, M second sampling terminals 313 and N second sampling terminals 313 are respectively arranged adjacently on both sides of the third sampling terminal 314. The M second sampling terminals 313 are arranged adjacently between one first sampling terminal 312 and the third sampling terminal 314, and the N second sampling terminals 313 are arranged adjacently between another first sampling terminal 312 and the third sampling terminal 314. By having the traces between the M second sampling terminals 313 and the connector terminal 311 bypass the outside of one first sampling terminal 312, and the traces between the N second sampling terminals 313 and the connector terminal 311 bypass the outside of another first sampling terminal 312, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, on the single-layer board of the FPC 31. This can reduce the cost of the battery device 1 and reduce the length of a single trace, which is convenient for the layout of the traces.

[0160] On the other hand, the routing that needs to be wound is the routing between at least one second sampling end 313 and the connector end 311. That is, the routing between at least one second sampling end 313 and the connector end 311 needs to be routed around the outside of the first sampling end 312. Usually, the gap of the first sampling end 312 along the outside of the first direction is relatively small, and the number of routings that can be allowed is limited. Therefore, this routing method is particularly suitable for situations where the number of second sampling ends 313 that are routed around the first sampling end 312 is relatively small.

[0161] In some embodiments, such as Figure 8 As shown, in FPC 31, the trace between the third sampling terminal 314 and the connector terminal 311 bypasses the outside of the M second sampling terminals 313.

[0162] Among them, at least one second sampling end 313 includes M second sampling ends 313 and N second sampling ends 313. Along the circumference of FPC 31, the M second sampling ends 313 and N second sampling ends 313 are respectively arranged adjacently on both sides of the third sampling end 314, and the M second sampling ends 313 are arranged adjacently between the first sampling end 312 and the third sampling end 314.

[0163] As an example, such as Figure 8As shown, two second sampling terminals 313 and one second sampling terminal 313 are respectively arranged adjacent to each other on both sides of the third sampling terminal 314 along the circumference of the FPC 31, and the first sampling terminal 312 is arranged adjacent to the two second sampling terminals 313 on the side away from the third sampling terminal 314 along the circumference of the FPC 31.

[0164] Along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 6. The third sampling end 314 is connected to pins 1 and 2 of connector end 311, the first sampling end 312 is connected to pin 3 of connector end 311, the two second sampling ends 313 are connected to pins 4 and 5 of connector end 311, and one second sampling end 313 is connected to pin 6 of connector end 311.

[0165] In this embodiment, along the circumference of the FPC 31, M second sampling terminals 313 and N second sampling terminals 313 are respectively arranged adjacently on both sides of the third sampling terminal 314, and the M second sampling terminals 313 are arranged adjacently between the first sampling terminal 312 and the third sampling terminal 314. By routing the trace between the third sampling terminal 314 and the connector terminal 311 around the outside of the M second sampling terminals 313, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, on the single-layer board of the FPC 31. This can reduce the cost of the battery device 1 and simplify the winding method.

[0166] In some embodiments, such as Figure 9 As shown, in FPC 31, the trace between the first sampling terminal 312 and the connector terminal 311 bypasses the outside of the third sampling terminal 314.

[0167] Along the circumference of FPC 31, the first sampling end 312 and the second sampling end 313 are respectively arranged adjacent to each other on one side and the other side of the third sampling end 314.

[0168] As an example, such as Figure 9 As shown, two second sampling terminals 313 and one second sampling terminal 313 are respectively arranged adjacent to each other on both sides of the third sampling terminal 314 along the circumference of the FPC 31, and the first sampling terminal 312 is arranged adjacent to the two second sampling terminals 313 on the side away from the third sampling terminal 314 along the circumference of the FPC 31.

[0169] Along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 5. Two second sampling ends 313 are connected to pins 1 and 2 of connector end 311, the first sampling end 312 is connected to pin 3 of connector end 311, and the third sampling end 314 is connected to pins 4 and 5 of connector end 311.

[0170] In this embodiment, along the circumference of the FPC 31, the first sampling terminal 312 and the second sampling terminal 313 are respectively arranged adjacent to each other on one side and the other side of the third sampling terminal 314. By routing the trace between the first sampling terminal 312 and the connector terminal 311 around the outside of the third sampling terminal 314, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 can be made to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, on the single-layer board of the FPC 31. This can reduce the cost of the battery device 1 and simplify the winding method.

[0171] In some embodiments, such as Figure 10 As shown, the trace between the third sampling terminal 314 and the connector terminal 311 bypasses the outside of the first sampling terminal 312.

[0172] Along the circumference of FPC 31, the first sampling end 312 and at least one second sampling end 313 are respectively arranged adjacent to each other on one side and the other side of the third sampling end 314.

[0173] As an example, such as Figure 10 As shown, two second sampling terminals 313 and one second sampling terminal 313 are respectively arranged adjacent to each other on both sides of the third sampling terminal 314 along the circumference of the FPC 31, and the first sampling terminal 312 is arranged adjacent to the two second sampling terminals 313 on the side away from the third sampling terminal 314 along the circumference of the FPC 31.

[0174] Along the first direction, from top to bottom, the pins of connector end 311 are numbered 1 to 5. Two second sampling ends 313 are connected to pins 1 and 2 of connector end 311, the first sampling end 312 is connected to pin 3 of connector end 311, and the third sampling end 314 is connected to pins 4 and 5 of connector end 311.

[0175] In this embodiment, along the circumference of FPC 31, the first sampling terminal 312 and the second sampling terminal 313 are respectively arranged adjacent to each other on one side and the other side of the third sampling terminal 314. By routing the trace between the third sampling terminal and the connector terminal around the outside of the first sampling terminal, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the single-layer board of FPC 31 can meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32. This can reduce the cost of the battery device 1 and simplify the winding method.

[0176] In some embodiments, such as Figure 11As shown, the FPC31 is provided with a first opening 316, a second opening 317 and a third opening 318. The first opening 316 is located inside the voltage sampling terminal along the first direction. The second opening 317 and the third opening 318 are respectively located on the edge of the FPC31 along the second direction and close to one of the voltage sampling terminals. The second opening 317 and the third opening 318 are respectively located on both sides of one of the voltage sampling terminals along the second direction. The first sampling terminal 312, at least one second sampling terminal 313 and the third sampling terminal 314 include a voltage sampling terminal.

[0177] For example, Figure 11 As shown, the first sampling terminal 312 and the second sampling terminal 313 can be voltage sampling terminals. Each voltage sampling terminal is surrounded by a first opening 316, a second opening 317, and a third opening 318.

[0178] The first opening 316, the second opening 317, and the third opening 318 are designed to reduce the stress on the voltage sampling terminal, such as its solder pads, caused by the deformation of the FPC31 due to the expansion of the battery cell volume, and to reduce the risk of solder joint tearing at the voltage sampling terminal.

[0179] In this case, the traces of at least one sampling end and connector end 311 can still be routed around the outside of the first direction from at least one other sampling end.

[0180] In this embodiment of the application, by providing a first opening 316, a second opening 317 and a third opening 318 around the voltage sampling terminal, the stress effect of the deformation of FPC 31 caused by the expansion of the battery cell volume on the voltage sampling terminal, such as its solder pads, is reduced, thereby reducing the risk of solder joint tearing at the voltage sampling terminal.

[0181] As an example, such as Figure 11 As shown, at least one additional sampling end includes a voltage sampling end, and at least one sampling end and connector end 311 are connected by a trace extending from one of the at least one sampling end and connector end 311 to between the first opening 316 and the second opening 317 of the voltage sampling end, and within the area surrounded by the first opening 316, the second opening 317 and the third opening 318, the trace surrounds the voltage sampling end again to between the first opening 316 and the second opening 317, and extends to the other of the at least one sampling end and connector end 311, wherein the distance between the first opening 316 and the third opening 318 is less than or equal to a preset distance and the distance between the first opening 316 and the second opening 317 is greater than the preset distance.

[0182] As an example, the preset distance is set based on the width of the trace and / or assembly requirements. For instance, the preset distance can be equal to the width of the trace, or it can be slightly larger than the width of the trace.

[0183] The gap between the first opening 316 and the third opening 318 is relatively small, and the FPC31 may break between the first opening 316 and the third opening 318 during the assembly and use of the FPC31. Therefore, it is best not to lay out traces between the first opening 316 and the third opening 318.

[0184] For example, the traces between at least one second sampling end 313 and the connector end 311 can extend from at least one second sampling end 313 to between the first opening 316 and the second opening 317, then extend around the first sampling end 312 to between the first opening 316 and the second opening 317, and then continue to extend to the connector end 311.

[0185] In this embodiment, when the sampling end to which the wire is wound includes a voltage sampling end, and the distance between the first opening 316 and the third opening 318 of the voltage sampling end is less than or equal to a preset distance and the distance between the first opening 316 and the second opening 317 is greater than a preset distance, the trace between at least one sampling end and the connector end 311 can enter the area surrounded by the opening from one of them through the area between the first opening 316 and the second opening 317, and after wrapping around the voltage sampling end in the other at least one sampling end, it extends out through the area between the first opening 316 and the second opening 317, and then connects to the other of the at least one sampling end and the connector end 311. This allows the potential difference between the sampling ends connected to the adjacent pins of the connector end 311 on the FPC31 single-layer board to meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32. This can reduce the cost of the FPC31, and thus reduce the cost of the battery device.

[0186] In some embodiments, the number at at least one sampling end is less than or equal to 3.

[0187] That is, the traces between at least one sampling terminal and connector terminal 311 must all bypass the outer side of a certain sampling terminal along the first direction. Three or four traces (two traces for the third sampling terminal 314) must be laid out along the outer side of this sampling terminal along the first direction. However, generally speaking, the space outside a certain sampling terminal along the first direction is limited, and the number of traces that can be laid out is also limited. Therefore, it is necessary to limit the number of at least one sampling terminal.

[0188] In this embodiment of the application, by setting the number of at least one sampling end to be less than or equal to 3, it is possible to arrange at least one sampling end and connector end 311 in the space outside the sampling end of the winding along the first direction.

[0189] In some embodiments, such as Figures 12 to 15As shown, the FPC 31 includes a first flat plate portion 151, a second flat plate portion 153, and a bending portion 152. The first flat plate portion 151 is connected to the second flat plate portion 153 through the bending portion 152. A portion of the first sampling end 312, at least one second sampling end 313, and a third sampling end 314 are disposed in one of the flat plate portions of the first flat plate portion 151 and the second flat plate portion 153, and the remaining portions are disposed in the other flat plate portion of the first flat plate portion 151 and the second flat plate portion 153.

[0190] That is, some of the traces between the sampling end and the connector end 311 are laid out along only one flat plate, while the traces between the remaining sampling ends and the connector 32 are mainly laid out along another flat plate.

[0191] In this embodiment, by setting a portion of the sampling terminals of the first sampling terminal 312, at least one second sampling terminal 313, and the third sampling terminal 314 on one of the first plate portion 151 and the second plate portion 153, and setting the other portion of the sampling terminals on the other plate portion of the first plate portion 151 and the second plate portion 153, the pins of the connector terminal 311 connected to the first sampling terminal 312 are adjacent to the pins of the connector terminal 311 connected to the third sampling terminal 314, and the pins of the connector terminal 311 connected to at least one second sampling terminal 313 are not adjacent to the pins of the connector terminal 311 connected to the third sampling terminal 314. This allows the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the FPC31 single-layer board to meet a preset voltage, such as the operating voltage allowed by the adjacent pins of the connector 32. This reduces the cost of the FPC31 and, consequently, the cost of the battery device 1.

[0192] In some embodiments, such as Figure 12 and Figure 13 As shown, the third sampling end 314 is disposed in one of the first plate portion 151 and the second plate portion 153, and at least one second sampling end 313 and the first sampling end 312 are disposed in the other plate portion of the first plate portion 151 and the second plate portion 153.

[0193] As an example, at least one second sampling end 313 and a first sampling end 312 are disposed on the first plate portion 151, and a third sampling end 314 is disposed on the second plate portion 153. The traces of at least one second sampling end 313 and the first sampling end 312 to the connector end 311 extend in the first plate portion 151, and the traces of the third sampling end 314 to the connector end 311 extend in the second plate portion 153, the bend portion 152, and the first plate portion 151.

[0194] As an example, such as Figure 12As shown, along the circumference of FPC 31, a second sampling terminal 313 is disposed adjacent to one side of the third sampling terminal 314. Along the first direction, from the inside to the outside, the pin numbers of the connector terminal 311 are 1 to 5. The third sampling terminal 314 is connected to pins 1 and 2 of the connector terminal 311, the first sampling terminal 312 is connected to pin 3 of the connector terminal 311, a second sampling terminal 313 is connected to pin 4 of the connector terminal 311, and a fourth sampling terminal 315 is connected to pin 5 of the connector terminal 311.

[0195] As an example, such as Figure 13 As shown, along the circumference of FPC 31, a second sampling terminal 313 is respectively arranged adjacent to each other on both sides of the third sampling terminal 314. Along the first direction, from the inside to the outside, the pin numbers of the connector terminal 311 are 1 to 5. The third sampling terminal 314 is connected to pins 1 and 2 of the connector terminal 311, the first sampling terminal 312 is connected to pin 3 of the connector terminal 311, one second sampling terminal 313 on one side of the third sampling terminal 314 is connected to pin 4 of the connector terminal 311, and the other second sampling terminal 313 on the other side of the third sampling terminal 314 is connected to pin 5 of the connector terminal 311.

[0196] In this embodiment, by setting the third sampling terminal 314 on one of the first plate portion 151 and the second plate portion 153, and setting at least one second sampling terminal 313 and the first sampling terminal 312 on the other plate portion of the first plate portion 151 and the second plate portion 153, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the single-layer board of the FPC 31 can meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, thereby reducing the cost of the FPC 31 and thus reducing the cost of the battery device 1.

[0197] In some embodiments, such as Figure 14 and Figure 15 As shown, the third sampling end 314 and the first sampling end 312 are disposed in one of the first plate portion 151 and the second plate portion 153, and N second sampling ends 313 are disposed in the other plate portion of the first plate portion 151 and the second plate portion 153.

[0198] As an example, a third sampling end 314 and a first sampling end 312 are disposed on a first plate portion 151, and at least one second sampling end 313 is disposed on a second plate portion 153. The traces between the third sampling end 314 and the first sampling end 312 and the connector end 311 extend in the first plate portion 151, and the traces between the at least one second sampling end 313 and the connector end 311 extend in the second plate portion 153, the bend portion 152, and the first plate portion 151.

[0199] As an example, such as Figure 14 As shown, a second sampling terminal 313 is disposed adjacent to one side of the third sampling terminal 314 along the circumference of FPC 31. Along the first direction, from the inside to the outside, the pin numbers of the connector terminal 311 are 1 to 5. The second sampling terminal 313 is connected to pin 1 of the connector terminal 311, the fourth sampling terminal 315 is connected to pin 2 of the connector terminal 311, the first sampling terminal 312 is connected to pin 3 of the connector terminal 311, and the third sampling terminal 314 is connected to pins 4 and 5 of the connector terminal 311.

[0200] As an example, such as Figure 15 As shown, along the circumference of FPC 31, a second sampling terminal 313 is respectively arranged adjacent to each other on both sides of the third sampling terminal 314. Along the first direction, from the inside to the outside, the pin numbers of the connector terminal 311 are 1 to 5. One second sampling terminal 313 on one side of the third sampling terminal 314 is connected to pin 1 of the connector terminal 311, the other second sampling terminal 313 on the other side of the third sampling terminal 314 is connected to pin 2 of the connector terminal 311, the first sampling terminal 312 is connected to pin 3 of the connector terminal 311, and the third sampling terminal 314 is connected to pins 4 and 5 of the connector terminal 311.

[0201] In this embodiment, by setting the third sampling terminal 314 and the first sampling terminal 312 on one of the first plate portion 151 and the second plate portion 153, and setting at least one second sampling terminal 313 on the other plate portion 151 and the second plate portion 153, it is possible to ensure that the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the single-layer board of the FPC 31 meets the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, thereby reducing the cost of the FPC 31 and thus reducing the cost of the battery device 1.

[0202] In some embodiments, such as Figure 16 or Figure 17 As shown, the third sampling end 314 and at least one second sampling end 313 are disposed in one of the first plate portion 151 and the second plate portion 153, and the first sampling end 312 is disposed in the other plate portion of the first plate portion 151 and the second plate portion 153.

[0203] Among them, such as Figure 16 As shown, along the circumference of FPC 31, at least one second sampling end 313 is disposed adjacent to one side of the third sampling end 314.

[0204] Or, such as Figure 17As shown, at least one second sampling end 313 includes M second sampling ends 313 and N second sampling ends 313. Along the circumference of FPC 31, the M second sampling ends 313 and N second sampling ends 313 are respectively arranged adjacently on both sides of the third sampling end 314. The M second sampling ends 313 are arranged adjacently between one first sampling end 312 and the third sampling end 314, and the N second sampling ends 313 are arranged adjacently between another first sampling end 312 and the third sampling end 314.

[0205] As an example, a third sampling terminal 314 and at least one second sampling terminal 313 are disposed on a first plate portion 151, and a first sampling terminal 312 is disposed on a second plate portion 153. The traces between the third sampling terminal 314 and at least one second sampling terminal 313 and the connector terminal 311 extend in the first plate portion 151, and the traces between the first sampling terminal 312 and the connector terminal 311 extend in the second plate portion 153, the bend portion 152, and the first plate portion 151.

[0206] As an example, such as Figure 16 As shown, along the circumference of FPC 31, a second sampling terminal 313 is disposed adjacent to one side of the third sampling terminal 314. Along the first direction, from the inside to the outside, the pin numbers of connector terminal 311 are 1 to 5. A second sampling terminal 313 is connected to pin 1 of connector terminal 311, a first sampling terminal 312 is connected to pin 2 of connector terminal 311, a third sampling terminal 314 is connected to pins 3 and 4 of connector terminal 311, and a fourth sampling terminal 315 is connected to pin 5 of connector terminal 311.

[0207] As an example, such as Figure 17 As shown, along the circumference of FPC 31, a second sampling terminal 313 is provided on one side of the third sampling terminal 314, and this second sampling terminal 313 is adjacent to a first sampling terminal 312 and the third sampling terminal 314; another second sampling terminal 313 is provided on one side of the third sampling terminal 314, and this other second sampling terminal 313 is adjacent to another first sampling terminal 322 and the third sampling terminal 314. Along the first direction, from the inside to the outside, the pin numbers of the connector terminal 311 are 1 to 6. One second sampling terminal 313 is connected to pin 1 of the connector terminal 311, one first sampling terminal 312 is connected to pin 2 of the connector terminal 311, the third sampling terminal 314 is connected to pins 3 and 4 of the connector terminal 311, another first sampling terminal 312 is connected to pin 5 of the connector terminal 311, and another second sampling terminal 313 is connected to pin 6 of the connector terminal.

[0208] In this embodiment, by setting the third sampling terminal 314 and at least one second sampling terminal 313 on one of the first plate portion 151 and the second plate portion 153, and setting the first sampling terminal 312 on the other plate portion of the first plate portion 151 and the second plate portion 153, the potential difference between the sampling terminals connected to the adjacent pins of the connector terminal 311 on the single-layer board of the FPC31 can meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, thereby reducing the cost of the FPC31 and thus reducing the cost of the battery device 1.

[0209] In some embodiments, such as Figure 18 As shown, the FPC 31 is provided with a first opening 316, a second opening 317 and a third opening 318. The first opening 316 is located inside the voltage sampling terminal along the first direction. The second opening 317 and the third opening 318 are respectively located on the edge of the FPC 31 along the second direction and close to the voltage sampling terminal. The second opening 317 and the third opening 318 are respectively located on both sides of a voltage sampling terminal along the second direction. The first sampling terminal 312, at least one second sampling terminal 313 and the third sampling terminal 314 include a voltage sampling terminal.

[0210] The contents of the first opening 316, the second opening 317, and the third opening 318 can be referred to the description above. For the sake of brevity, this application will not repeat them here.

[0211] As an example, a first opening 316, a second opening 317, and a third opening 318 can be provided around each voltage sampling terminal.

[0212] In this embodiment, the first opening 316, the second opening 317, and the third opening 318 can still be provided around the voltage sampling terminal. The FPC31 single-layer board, including the first flat plate portion 151, the bent portion 152, and the second flat plate portion 153, can still be used to make the pin of the connector end 311 connected to the first sampling terminal 312 adjacent to the pin of the connector end 311 connected to the third sampling terminal 314, and make the pin of the connector end 311 connected to at least one second sampling terminal 313 not adjacent to the pin of the connector end 311 connected to the third sampling terminal 314. In this way, the potential difference between the sampling terminals connected to the adjacent pins of the connector end 311 on the FPC 31 single-layer board can meet the preset voltage, such as the working voltage allowed by the adjacent pins of the connector 32, which can reduce the cost of the FPC31 and thus reduce the cost of the battery device 1.

[0213] In some embodiments, such as Figure 18As shown, the trace between the voltage sampling terminal and the connector terminal 311 extends from one of the voltage sampling terminal and the connector terminal 311 through the space between the first opening 316 and the second opening 317 to the other of the voltage sampling terminal and the connector terminal 311. The distance between the first opening 316 and the third opening 318 is less than or equal to a preset distance and the distance between the first opening 316 and the second opening 317 is greater than the preset distance.

[0214] The contents of the first opening 316, the second opening 317, the third opening 318, and the preset distance can be referred to the description above, and will not be repeated here.

[0215] As an example, the trace between the voltage sampling terminal and the connector terminal 311 in the first sampling terminal 312, at least one second sampling terminal 313 and the third sampling terminal 314 can be connected from the voltage sampling terminal to the connector terminal 311 via the first opening 316 and the second opening 317 around the voltage sampling terminal.

[0216] In some embodiments, such as Figures 12 to 18 As shown, the first plate portion 151 is disposed outside the second plate portion 153, the second plate portion 153 is disposed outside the battery pack 2, and the connector end 311 is disposed outside the first plate portion 151.

[0217] For example, connector end 311 is disposed above the first flat plate portion 151, the first flat plate portion 151 is disposed above the second flat plate portion 153, and the second flat plate portion 153 is disposed above the battery pack 2.

[0218] The first plate portion 151 is disposed outside the second plate portion 153, the second plate portion 153 is disposed outside the battery pack 2, and the connector end 311 is disposed outside the first plate portion 151. In this way, the connector 32 can face the outside of the battery device 1, which can reduce the impact of the connector 32 on the assembly when the FPC 31 is assembled with the battery pack 2.

[0219] This application embodiment also provides a battery sampling FPC31, which is a single-layer board. The FPC31 includes: a connector end 311 for fixing a connector 32 to the FPC31; and multiple sampling ends, including a first sampling end 312, at least one second sampling end 313, and a third sampling end 314. The first sampling end 312, the second sampling end 313, and the third sampling end 314 are respectively connected to a first pin, a second pin, and a third pin of the connector end 311 through wiring. The first pin and the third pin are adjacent, while the second pin and the third pin are not adjacent. The potential difference collected between the first sampling end 312 and the third sampling end 314 meets a preset voltage. The potential differences collected between the second sampling end 313 and the third sampling end 314 respectively exceed the preset voltage. At least one second sampling end 313 is disposed adjacent to one or both sides of the third sampling end 314 along the circumference of the FPC 31.

[0220] For further details about the FPC31, please refer to the above text. Figures 1 to 18 For the sake of brevity, the contents of this application will not be repeated here.

[0221] This application also provides a battery management system, which includes the battery sampling FPC31 in the above embodiments.

[0222] In some embodiments, this application also provides an energy storage device, which includes the battery sampling FPC31 in the above embodiments, or the battery device 1 in the above embodiments.

[0223] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device includes: A battery pack consists of multiple individual battery cells; An FPC assembly is disposed on the battery pack. The FPC assembly includes a single-layer FPC board and a connector. The FPC includes a connector end and multiple sampling ends. The connector end is used to fix the connector to the FPC. The multiple sampling ends include a first sampling end, at least one second sampling end, and a third sampling end. The first sampling end, the second sampling end, and the third sampling end are respectively connected to a first pin, a second pin, and a third pin of the connector end via traces. The first pin is adjacent to the third pin, and the second pin is not adjacent to the third pin. The potential difference collected between the first sampling terminal and the third sampling terminal satisfies a preset voltage, and the potential difference collected between the second sampling terminal and the third sampling terminal exceeds the preset voltage. The at least one second sampling terminal is disposed adjacent to one or both sides of the third sampling terminal along the circumference of the FPC.

2. The battery device according to claim 1, characterized by In the FPC, the traces of at least one sampling terminal and the connector terminal bypass the outside of at least one other sampling terminal, wherein the first sampling terminal, the at least one second sampling terminal, and the third sampling terminal include the at least one sampling terminal and the at least one other sampling terminal.

3. The battery device according to claim 2, characterized in that, In the FPC, the trace between the first sampling terminal and the connector terminal bypasses from the outside of the at least one second sampling terminal, or... The trace between the at least one second sampling terminal and the connector terminal bypasses the outside of the first sampling terminal. Wherein, along the circumferential direction of the FPC, the first sampling end and the at least one second sampling end are both disposed on one side of the third sampling end, and the at least one second sampling end is disposed adjacent to the first sampling end and the third sampling end.

4. The battery device according to claim 2, characterized in that, In the FPC, the trace between the third sampling terminal and the connector terminal bypasses from the outside of the first sampling terminal and the at least one second sampling terminal, or, The traces between the first sampling terminal and the at least one second sampling terminal and the connector terminal respectively bypass the outside of the third sampling terminal. Wherein, along the circumferential direction of the FPC, the first sampling end and the at least one second sampling end are both disposed on one side of the third sampling end, and the at least one second sampling end is disposed adjacent to one of the first sampling end and the third sampling end.

5. The battery device according to claim 2, characterized in that, In the FPC, one trace between the first sampling terminal and the connector terminal bypasses the outside of the M second sampling terminals, and another trace between the first sampling terminal and the connector terminal bypasses the outside of the N second sampling terminals, or... The traces between the M second sampling terminals and the connector terminal respectively bypass the outside of one first sampling terminal, and the traces between the N second sampling terminals and the connector terminal bypass the outside of another first sampling terminal. Wherein, the at least one second sampling end includes the M second sampling ends and the N second sampling ends. Along the circumference of the FPC, the M second sampling ends and the N second sampling ends are respectively arranged adjacently on both sides of the third sampling end. The M second sampling ends are arranged adjacently between one first sampling end and the third sampling end, and the N second sampling ends are arranged adjacently between another first sampling end and the third sampling end.

6. The battery device according to claim 2, characterized in that, In the FPC, the trace between the third sampling end and the connector end bypasses the outside of the M second sampling ends. The at least one second sampling end includes the M second sampling ends and N second sampling ends. Along the circumference of the FPC, the M second sampling ends and the N second sampling ends are respectively arranged adjacent to each other on both sides of the third sampling end, and the M second sampling ends are arranged adjacent to each other between the first sampling end and the third sampling end.

7. The battery device according to claim 2, characterized in that, In the FPC, the trace between the first sampling terminal and the connector terminal bypasses the outside of the third sampling terminal, or... The trace between the third sampling terminal and the connector terminal bypasses the outside of the first sampling terminal. Wherein, along the circumference of the FPC, the first sampling end and the at least one second sampling end are respectively disposed adjacent to each other on one side and the other side of the third sampling end.

8. The battery device according to any one of claims 2 to 7, characterized in that, The FPC is provided with a first opening, a second opening and a third opening. The first opening is located inside the voltage sampling terminal along a first direction. The second opening and the third opening are respectively located on the edge of the FPC along a second direction and close to the voltage sampling terminal. The second opening and the third opening are respectively located on both sides of the voltage sampling terminal along the second direction. The voltage sampling terminal is included among the first sampling terminal, the at least one second sampling terminal and the third sampling terminal.

9. The battery device according to claim 8, characterized in that, The additional at least one sampling end includes the voltage sampling end, and the trace of the at least one sampling end and the connector end extends from one of the at least one sampling end and the connector end to between the first opening and the second opening of the voltage sampling end, and then around the voltage sampling end again to between the first opening and the second opening in the area surrounded by the first opening, the second opening and the third opening, and extends to the other of the at least one sampling end and the connector end, wherein the distance between the first opening and the third opening is less than or equal to a preset distance and the distance between the first opening and the second opening is greater than the preset distance.

10. The battery device according to any one of claims 2 to 7, characterized in that, The number of at least one sampling end is less than or equal to 3.

11. The battery device according to claim 1, characterized in that, The FPC includes a first flat plate portion, a second flat plate portion, and a bending portion. The first flat plate portion is connected to the second flat plate portion through the bending portion. A portion of the first sampling end, the second sampling end, and the third sampling end is disposed in one of the first flat plate portion and the second flat plate portion, and the other portion is disposed in the other flat plate portion.

12. The battery device according to claim 11, characterized in that, The third sampling end is disposed in one of the first plate portion and the second plate portion, and the first sampling end and N second sampling ends are disposed in the other plate portion of the first plate portion and the second plate portion.

13. The battery device according to claim 11, characterized in that, The first sampling end and the third sampling end are disposed in one of the first plate portion and the second plate portion, and the at least one second sampling end is disposed in the other plate portion of the first plate portion and the second plate portion.

14. The battery device according to claim 11, characterized in that, The at least one second sampling end and the third sampling end are disposed in one of the first plate portion and the second plate portion, and the first sampling end is disposed in the other plate portion. Wherein, along the circumference of the FPC, at least one second sampling end is disposed adjacent to one side of the third sampling end; or, the at least one second sampling end includes M second sampling ends and N second sampling ends, along the circumference of the FPC, the M second sampling ends and the N second sampling ends are respectively disposed adjacent to both sides of the third sampling end, the M second sampling ends are disposed adjacent to one first sampling end and the third sampling end, and the N second sampling ends are disposed adjacent to another first sampling end and the third sampling end.

15. The battery device according to any one of claims 11 to 14, characterized in that, The first plate portion is disposed outside the second plate portion, the second plate portion is disposed outside the battery pack, and the connector end is disposed outside the first plate portion.

16. A battery sampling FPC, characterized in that, The FPC is a single-layer board, and the FPC includes: Connector end, used to fix the connector to the FPC; The device has multiple sampling terminals, including a first sampling terminal, at least one second sampling terminal, and a third sampling terminal. The first sampling terminal, the second sampling terminal, and the third sampling terminal are respectively connected to a first pin, a second pin, and a third pin of the connector end via traces. The first pin is adjacent to the third pin, and the second pin is not adjacent to the third pin. The potential difference collected between the first sampling terminal and the third sampling terminal satisfies a preset voltage, and the potential difference collected between the second sampling terminal and the third sampling terminal exceeds the preset voltage. The at least one second sampling terminal is disposed adjacent to one or both sides of the third sampling terminal along the circumference of the FPC.

17. The FPC according to claim 16, characterized in that, The trace of at least one sampling terminal and the connector terminal bypasses the outside of the other at least one sampling terminal, wherein the first sampling terminal, the at least one second sampling terminal and the third sampling terminal include the at least one sampling terminal and the other at least one sampling terminal.

18. The FPC according to claim 17, characterized in that, The trace between the first sampling terminal and the connector terminal bypasses from the outside of the at least one second sampling terminal, or, The trace between the at least one second sampling terminal and the connector terminal bypasses the outside of the first sampling terminal. Wherein, along the circumferential direction of the FPC, the first sampling end and the at least one second sampling end are both disposed on one side of the third sampling end, and the at least one second sampling end is disposed adjacent to the first sampling end and the third sampling end.

19. The FPC according to claim 17, characterized in that, The trace between the third sampling terminal and the connector terminal bypasses the outside of the first sampling terminal and the at least one second sampling terminal, or... The traces between the first sampling terminal and the at least one second sampling terminal and the connector terminal respectively bypass the outside of the third sampling terminal. Wherein, along the circumferential direction of the FPC, the first sampling end and the at least one second sampling end are both disposed on one side of the third sampling end, and the at least one second sampling end is disposed adjacent to one of the first sampling end and the third sampling end.

20. The FPC according to claim 17, characterized in that, One trace between the first sampling terminal and the connector terminal bypasses the outside of the M second sampling terminals, and another trace between the first sampling terminal and the connector terminal bypasses the outside of the N second sampling terminals, or... The traces between the M second sampling terminals and the connector terminal respectively bypass the outside of one first sampling terminal, and the traces between the N second sampling terminals and the connector terminal bypass the outside of another first sampling terminal. Wherein, the at least one second sampling end includes the M second sampling ends and the N second sampling ends. Along the circumference of the FPC, the M second sampling ends and the N second sampling ends are respectively arranged adjacently on both sides of the third sampling end. The M second sampling ends are arranged adjacently between one first sampling end and the third sampling end, and the N second sampling ends are arranged adjacently between another first sampling end and the third sampling end.

21. The FPC according to claim 17, characterized in that, The trace between the third sampling end and the connector end bypasses the outside of the M second sampling ends. The at least one second sampling end includes the M second sampling ends and N second sampling ends. Along the circumference of the FPC, the M second sampling ends and the N second sampling ends are respectively arranged adjacent to each other on both sides of the third sampling end, and the M second sampling ends are arranged adjacent to each other between the first sampling end and the third sampling end.

22. The FPC according to claim 17, characterized in that, The trace between the first sampling terminal and the connector terminal bypasses the outside of the third sampling terminal, or... The trace between the third sampling terminal and the connector terminal bypasses the outside of the first sampling terminal. Wherein, along the circumference of the FPC, the first sampling end and the at least one second sampling end are respectively disposed adjacent to each other on one side and the other side of the third sampling end.

23. The FPC according to any one of claims 17 to 22, characterized in that, The FPC is provided with a first opening, a second opening and a third opening. The first opening is located inside the voltage sampling terminal along a first direction. The second opening and the third opening are respectively located on the edge of the FPC along a second direction and close to the voltage sampling terminal. The second opening and the third opening are respectively located on both sides of the voltage sampling terminal along the second direction. The first sampling terminal, the at least one second sampling terminal and the third sampling terminal include the voltage sampling terminal.

24. The FPC according to claim 23, characterized in that, The additional at least one sampling end includes the voltage sampling end, and the trace of the at least one sampling end and the connector end extends from one of the at least one sampling end and the connector end to between the first opening and the second opening of the voltage sampling end, and then around the voltage sampling end again to between the first opening and the second opening in the area surrounded by the first opening, the second opening and the third opening, and extends to the other of the at least one sampling end and the connector end, wherein the distance between the first opening and the third opening is less than or equal to a preset distance and the distance between the first opening and the second opening is greater than the preset distance.

25. The FPC according to any one of claims 17 to 22, characterized in that, The number of at least one sampling end is less than or equal to 3.

26. The FPC according to claim 16, characterized in that, The FPC includes a first flat plate portion, a second flat plate portion, and a bending portion. The first flat plate portion is connected to the second flat plate portion through the bending portion. A portion of the first sampling end, the second sampling end, and the third sampling end is disposed in one of the first flat plate portion and the second flat plate portion, and the other portion is disposed in the other flat plate portion.

27. The FPC according to claim 26, characterized in that, The third sampling end is disposed in one of the first plate portion and the second plate portion, and the first sampling end and the at least one second sampling end are disposed in the other plate portion of the first plate portion and the second plate portion.

28. The FPC according to claim 26, characterized in that, The first sampling end and the third sampling end are disposed in one of the first plate portion and the second plate portion, and N second sampling ends are disposed in the other plate portion of the first plate portion and the second plate portion.

29. The FPC according to claim 26, characterized in that, The at least one second sampling end and the third sampling end are disposed in one of the first plate portion and the second plate portion, and the first sampling end is disposed in the other plate portion. Wherein, along the circumference of the FPC, at least one second sampling end is disposed adjacent to one side of the third sampling end; or, the at least one second sampling end includes M second sampling ends and N second sampling ends, along the circumference of the FPC, the M second sampling ends and the N second sampling ends are respectively disposed adjacent to both sides of the third sampling end, the M second sampling ends are disposed adjacent to one first sampling end and the third sampling end, and the N second sampling ends are disposed adjacent to another first sampling end and the third sampling end.

30. The FPC according to any one of claims 26 to 29, characterized in that, The first plate portion is disposed outside the second plate portion, the second plate portion is disposed outside the battery pack, and the connector end is disposed outside the first plate portion.

31. A battery management system, characterized in that, The battery management system includes a battery sampling FPC as described in any one of claims 16 to 30.

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