FPC structure, battery and vehicle

Abstract

The utility model discloses an FPC structure, a battery and a vehicle, and belongs to the technical field of battery cell sampling. The FPC structure is used for being mounted on one side of the battery cell group, and the FPC structure comprises a first sampling circuit board which extends along a first direction and is provided with a first opening for avoiding an anti-explosion valve on a battery cell; the second sampling circuit board extends along the first direction and is overlapped with the first sampling circuit board, and a second opening corresponding to the first opening is formed in the second sampling circuit board; wherein the length of the first sampling circuit board in the first direction is larger than that of the second sampling circuit board, a plurality of first sampling supporting feet are arranged on the non-overlapping part of the first sampling circuit board and the second sampling circuit board, and a plurality of second sampling supporting feet are arranged on the second sampling circuit board. The first opening and the second opening are formed to avoid an anti-explosion valve on the battery cell, and the two sampling circuit boards are arranged in a stacked mode, so that the problem that the arrangement width of the sampling circuit boards is insufficient due to the fact that the openings are formed is solved.

Description

Technical Field

[0001] This application belongs to the technical field of battery cell sampling, and particularly relates to an FPC structure, a battery, and a vehicle. Background Art

[0002] Currently, lithium batteries are mainly used as energy storage devices in the new energy field. The inside of a battery pack consists of several battery cells. To ensure the safety of the battery cells, it is necessary to collect the voltage and temperature signals of each single-module battery cell in real time and transmit these signals to the BMS (Battery Management System) for analysis and processing. The current mainstream voltage and temperature signal sampling wire harnesses in the market are composed of flexible printed circuit boards, abbreviated as FPC (Flexible Printed Circuit) sampling wire harnesses. Such FPC sampling wire harnesses are welded to the positive and negative electrodes of the battery cells and are transmitted above the battery cells to the BMS controller.

[0003] Since an explosion-proof valve is generally designed in the middle of the battery cell, when the battery cell explodes, it is easy to ablate the FPC sampling wire harness, resulting in the interruption of the sampling signal and even fire. To solve the above problems, the current FPC sampling wire harness generally adopts a hollow design to prevent the FPC sampling wire harness from being ablated when the battery cell explodes. However, this design will cause the effective width dimension of the FPC sampling wire harness to be insufficient and cannot meet the requirement of collecting multiple voltage and temperature signals. Summary of the Utility Model

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides an FPC structure, a battery, and a vehicle, and solves the problem of insufficient layout width of the sampling circuit board caused by the setting of openings by arranging two sampling circuit boards in a stacked manner.

[0005] In a first aspect, this application provides an FPC structure for being installed on one side of a battery cell group. The FPC structure includes:

[0006] A first sampling circuit board extending along a first direction. The first sampling circuit board is provided with a first opening for avoiding the explosion-proof valve on the battery cell.

[0007] A second sampling circuit board extending along the first direction and overlapping with the first sampling circuit board. The second sampling circuit board is provided with a second opening corresponding to the first opening.

[0008] Wherein, the length of the first sampling circuit board in the first direction is longer than that of the second sampling circuit board. A plurality of first sampling feet are provided on the non-overlapping part of the first sampling circuit board and the second sampling circuit board. A plurality of second sampling feet are provided on the second sampling circuit board.

[0009] According to the FPC structure of the present application, a first opening and a second opening are respectively provided on the first sampling circuit board and the second sampling circuit board to avoid the explosion-proof valve on the battery cell. The first sampling circuit board and the second sampling circuit board are stacked so that the first sampling circuit board and the second sampling circuit board respectively sample multiple battery cells arranged along the first direction. The number of wirings required on a single sampling circuit board is reduced, thereby reducing the space occupied by the FPC structure in the width direction while avoiding the explosion-proof valve, and ensuring that the first sampling circuit board and the second sampling circuit board both have sufficient effective wiring width while reducing the total width.

[0010] According to an embodiment of the present application, the first sampling circuit board is used to be fixedly connected to the battery cell, and the second sampling circuit board is arranged on a side of the first sampling circuit board away from the battery cell.

[0011] According to an embodiment of the present application, foam is provided on a side of the first sampling circuit board facing away from the second sampling circuit board.

[0012] According to one embodiment of the present application, the sides of the first sampling circuit board and the second sampling circuit board are both provided with a widened portion extending in the direction, and the widened portion is suitable for being staggered with the bar on the battery cell, and the wiring harnesses of the first sampling circuit board and the second sampling circuit board are widened at the position of the widened portion.

[0013] According to an embodiment of the present application, the first ends of the first sampling circuit board and the second sampling circuit board in the first direction are respectively connected to the first wiring terminal and the second wiring terminal, and the first wiring terminal and the second wiring terminal are arranged side by side along the second direction.

[0014] According to one embodiment of the present application, the first opening is spaced apart from the first end of the first sampling circuit board, and the spacing distance L1 is suitable for the number of cells n in the cell group to satisfy: 3 mm / cell≤L1 / n≤3.5 mm / cell; and / or,

[0015] The second opening is spaced apart from the first end of the second sampling circuit board, and the spacing distance L2 is suitable for the number of cells n in the cell group to satisfy: 3 mm / cell≤L2 / n≤3.5 mm / cell.

[0016] According to one embodiment of the present application, the FPC structure also includes a connector for connecting to the battery box, the first sampling circuit board and the second sampling circuit board are fixedly connected to the connector by heat pressing, and the first terminal and the second terminal are arranged on the connector.

[0017] According to one embodiment of the present application, at least one temperature sampling foot is provided on the side of the first sampling circuit board and the second sampling circuit board, a clamping piece is provided on the side of the first sampling circuit board close to the battery cell group, the temperature sampling foot is arranged on the lower side of the clamping piece, and the clamping piece is used to press the temperature sampling foot onto the battery cell.

[0018] In a second aspect, the present application provides a battery, which includes:

[0019] a battery cell group including a plurality of battery cells arranged along a first direction;

[0020] an FPC structure according to any one of the technical solutions in the first aspect, disposed on one side of the battery cell group, and a plurality of first sampling pins and a plurality of second sampling pins are respectively connected to the plurality of battery cells.

[0021] The beneficial effects of the battery in the second aspect of the present application are the same as those of the FPC structure in the first aspect, and will not be elaborated here.

[0022] In a third aspect, the present application provides a vehicle, including the battery in the second aspect, and the battery is used to provide electrical energy for the vehicle.

[0023] The beneficial effects of the vehicle in the third aspect of the present application are the same as those of the battery in the second aspect, and will not be elaborated here.

[0024] The additional aspects and advantages of the present application will be partially given in the following description, partially will become apparent from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0026] Figure 1 is a schematic assembly structure diagram of the FPC structure and the battery cell group provided by an embodiment of the present application;

[0027] Figure 2 is an exploded structure diagram of the FPC structure provided by an embodiment of the present application;

[0028] Figure 3 is one of the partial structure diagrams of the FPC structure provided by an embodiment of the present application;

[0029] Figure 4 is a structure diagram of the FPC structure provided by an embodiment of the present application;

[0030] Figure 5 is another partial structure diagram of the FPC structure provided by an embodiment of the present application;

[0031] Figure 6 is a partial assembly structure diagram of the FPC structure and the battery cell group provided by an embodiment of the present application;

[0032] Figure 7 is a partial structure diagram of the battery provided by an embodiment of the present application.

[0033] Reference numerals:

[0034] 1. FPC structure; 11. First sampling circuit board; 111. First opening; 112. First sampling leg; 113. First terminal; 12. Second sampling circuit board; 121. Second opening; 122. Second sampling leg; 123. Second terminal; 13. Foam; 14. Widened part; 15. Temperature sampling leg; 16. Compressing member; 17. Connecting member; 2. Battery; 21. Battery cell group; 211. Tab; 212. Explosion-proof valve. Detailed implementation manners

[0035] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0036] Reference will be made below to Figures 1-6 describe the FPC structure according to the embodiment of the present application.

[0037] Please refer to Figure 1 , the FPC structure of the embodiment of the present application is used to be installed on one side of the battery cell group 21 for collecting voltage and temperature signals of the battery cells and transmitting control signals.

[0038] Please refer to Figure 1 and Figure 2 , the FPC structure includes a first sampling circuit board 11 and a second sampling circuit board 12. The first sampling circuit board 11 extends along a first direction, and the first sampling circuit board 11 is provided with a first opening 111 for avoiding the explosion-proof valve 212 on the battery cell; the second sampling circuit board 12 extends along the first direction and overlaps with the first sampling circuit board 11, and a second opening 121 corresponding to the first opening 111 is provided on the second sampling circuit board 12.

[0039] By providing a first opening 111 on the first sampling circuit board 11, the first sampling circuit board 11 is divided into two parts distributed in the width direction to avoid the explosion-proof valve 212 on the battery cell, thereby reducing the probability of damage to the first sampling circuit board 11 that may be caused by the eruption of the explosion-proof valve 212. By providing that the second sampling circuit board 12 also extends in the first direction, the second sampling circuit board 12 can be arranged to overlap the first sampling circuit board 11 in the thickness direction. By providing a second opening 121 on the second sampling circuit board 12, the second sampling circuit board 12 is divided into two parts distributed in the width direction, and the second opening 121 corresponds to the first opening 111, so that the second opening 121 can also avoid the explosion-proof valve 212 on the battery cell, thereby reducing the probability of damage to the first sampling circuit board 11 that may be caused by the eruption of the explosion-proof valve 212, and further improving the safety performance and reliability of the FPC structure.

[0040] Wherein, the length of the first sampling circuit board 11 in the first direction is longer than that of the second sampling circuit board 12. A plurality of first sampling feet 112 are provided on the non-overlapping part of the first sampling circuit board 11 and the second sampling circuit board 12, and a plurality of second sampling feet 122 are provided on the second sampling circuit board 12.

[0041] The length of the first sampling circuit board 11 is longer than that of the second sampling circuit board 12. Exemplarily, the length of the first sampling circuit board 11 is consistent with the total length of the battery cell group 21, and the length of the second sampling circuit board 12 is shorter than the total length of the battery cell group 21, so that the second sampling circuit board 12 only corresponds to some of the battery cells of the battery cell group 21. Wherein, a plurality of first sampling feet 112 are provided on the non-overlapping part of the first sampling circuit board 11 and the second sampling circuit board 12, and the plurality of first sampling feet 112 can be connected to a plurality of battery cells in the battery cell group 21 that cannot be covered by the second sampling circuit board 12. A plurality of second sampling feet 122 are provided on the second sampling circuit board 12, and the plurality of second sampling feet 122 are respectively connected to a plurality of battery cells that can be covered by the second sampling circuit board 12.

[0042] In the related art, after providing an avoidance opening for avoiding the explosion-proof valve 212 in the middle of the FPC, it will cause the effective width dimension of the FPC sampling wire harness to be insufficient and unable to meet the requirements for collecting multi-channel voltage and temperature signals. Some solutions choose to further widen the width of the FPC to meet the layout space of the FPC sampling wire harness, thereby increasing the space occupied by the entire FPC sampling wire harness, occupying a large amount of space on the top of the battery cell, being unfavorable for the design of other components, and even unable to meet the space layout requirements.

[0043] This technical solution is directed to a battery cell group 21, and two circuit boards, i.e., a first sampling circuit board 11 and a second sampling circuit board 12, are provided. The data sampling and signal transmission of a battery cell group 21 are simultaneously performed through these two circuit boards, realizing the division of multiple battery cells of a battery cell group 21 into two parts. Each sampling circuit board only needs to be connected to some of the battery cells, thereby reducing the number of wire harnesses that a single circuit board needs to accommodate. Thus, the wire harness layout requirements can be met under a limited layout area, making the FPC structure more compact and having a higher space utilization rate.

[0044] For the FPC structure according to the embodiment of the present application, by respectively providing a first opening 111 and a second opening 121 on the first sampling circuit board 11 and the second sampling circuit board 12 to avoid the explosion-proof valve 212 on the battery cell, and by stacking the first sampling circuit board 11 and the second sampling circuit board 12, the first sampling circuit board 11 and the second sampling circuit board 12 respectively sample multiple battery cells arranged along the first direction. The number of wirings required on a single sampling circuit board is reduced. Thus, while avoiding the explosion-proof valve 212, the space occupied by the FPC structure in the width direction can be reduced, and while reducing the total width, it is ensured that both the first sampling circuit board 11 and the second sampling circuit board 12 have sufficient effective wiring widths.

[0045] Please refer to Figure 2 and Figure 3 , according to some embodiments of the present application, the first sampling circuit board 11 is used for fixedly connecting to the battery cell, and the second sampling circuit board 12 is disposed on the side of the first sampling circuit board 11 facing away from the battery cell.

[0046] Since the length of the first sampling circuit board 11 is longer than that of the second sampling circuit board 12, by first fixedly connecting the first sampling circuit board 11 to the battery cell and then installing the second sampling circuit board 12 on the side of the first sampling circuit board 11 facing away from the battery cell, the overall layout is more flat, facilitating assembly and ensuring the installation stability.

[0047] The second sampling circuit board 12 can be fixed on the first sampling circuit board 11 by means of adhesion, with simple assembly and high stability.

[0048] Please refer to Figure 3 , according to some embodiments of the present application, a foam 13 is provided on the side of the first sampling circuit board 11 facing away from the second sampling circuit board 12.

[0049] The foam 13 has good compressibility and elasticity, which can ensure more stable contact between the first sampling circuit board 11 and the battery cell. During the assembly and use of the battery pack 2, the foam 13 can absorb and disperse external forces, avoiding poor contact caused by vibration or extrusion, thus ensuring the accuracy and stability of signal acquisition. It simplifies the installation process of the circuit board and the battery cell, eliminating the need for additional fixing parts or complex positioning devices. At the same time, when maintaining or replacing the circuit board, the foam 13 also makes disassembly more convenient, reducing the maintenance cost.

[0050] Moreover, the foam 13 material usually has certain heat insulation properties and can serve as a thermal isolation layer to reduce the direct impact of the heat generated by the battery cell on the circuit board, contributing to the thermal management of the circuit board. In addition, the foam 13 can also provide additional insulation effects, enhancing the electrical isolation between the circuit board and the battery cell and improving the safety of the system. During the charging and discharging process of the battery 2, the shape of the battery cell may change slightly. The elasticity of the foam 13 can adapt to this change, ensuring continuous good contact between the circuit board and the battery cell and avoiding signal acquisition problems caused by the change in the shape of the battery cell.

[0051] Please refer to Figure 4 、 Figure 5 and Figure 6 According to some embodiments of the present application, both sides of the first sampling circuit board 11 and the second sampling circuit board 12 are provided with widened portions 14 extending along the direction. The widened portions 14 are adapted to be arranged offset from the tabs 211 on the battery cell. The wire harnesses of the first sampling circuit board 11 and the second sampling circuit board 12 are widened at the positions of the widened portions 14.

[0052] By providing the widened portions 14, more space is provided for wiring, widening the wire harnesses of the sampling circuit board at the positions of the widened portions 14, thereby reducing the wire resistance of the wire harnesses inside the sampling circuit board and ensuring that the internal resistance of each wire harness in the sampling circuit board is not greater than 1Ω, and further ensuring the stability of signal transmission.

[0053] It can be understood that the tabs 211 are used to connect the electrodes of adjacent battery cells. The temperature of the tabs 211 is relatively high during the operation of the battery cell. By arranging the widened portions 14 to be offset from the tabs 211 on the battery cell, the influence of the heat of the tabs 211 on the widened portions 14 can be avoided, improving the stability of the sampling circuit board during operation.

[0054] In one example, the widened portion 14 may be disposed near the first sampling leg 112 or the second sampling leg 122. The first sampling leg 112 and the second sampling leg 122 also have heat insulation requirements. Therefore, the positions of the first sampling leg 112 and the second sampling leg 122 are generally separated from the battery cell by a mica plate. By disposing the widened portion 14 near the first sampling leg 112 or the second sampling leg 122, the widened portion 14 can also be separated from the battery cell by the mica plate, avoiding being damaged by high temperature.

[0055] Please refer to Figures 2-6 , according to some embodiments of the present application, a first wiring terminal 113 and a second wiring terminal 123 are respectively connected to the first ends of the first sampling circuit board 11 and the second sampling circuit board 12 in a first direction, and the first wiring terminal 113 and the second wiring terminal are arranged side by side in a second direction.

[0056] It can be understood that, for the convenience of signal input and output of the two sampling circuit boards, the first ends of the two sampling circuit boards overlap, and the second ends are arranged in a staggered manner. The first opening 111 extends to the first end of the first sampling circuit board 11, and the second opening 121 extends to the second end of the second sampling circuit board 12.

[0057] By arranging the first wiring terminal 113 and the second wiring terminal 123 at the same end of the two sampling circuit boards and arranging them side by side in the second direction, the signals collected by the two sampling circuit boards can be conveniently integrated and output. This design simplifies the connection process with external devices (such as a BMS controller), making the signal transmission more direct and efficient. The side-by-side arranged wiring terminals can effectively utilize space. Especially when the internal space of the battery pack 2 is limited, this compact layout helps to save space, enabling the FPC structure to adapt to a smaller battery pack 2 size and improving space utilization.

[0058] Please refer to Figure 5 , according to some embodiments of the present application, the first opening 111 is spaced from the first end of the first sampling circuit board 11, and the spacing distance L1 is suitable for satisfying the number of battery cells n in the battery cell group 21: 3 mm / cell

[0059] ≤ L1 / n ≤ 3.5 mm / cell; and / or, the second opening 121 is spaced from the first end of the second sampling circuit board 12, and the spacing distance L2 is suitable for satisfying the number of battery cells n in the battery cell group 21: 3 mm / cell ≤ L2 / n ≤ 3.5 mm / cell.

[0060] When the number of battery cells in the battery cell group 21 is relatively large, the number of wire harnesses arranged on a single sampling circuit board is also relatively large. The number of wire harnesses to be arranged at the first end where the first sampling circuit board 11 is connected to the first wiring terminal 113 is the largest, and the two parts separated by the first opening 111 need to be joined together at the first end for easy connection to the first wiring terminal 113. By setting the first opening 111 at an interval from the first end of the first sampling circuit board 11, the width of the part of the first sampling circuit board 11 near the first end is made wider. When the number of wire harnesses near the first end of the first sampling circuit board 11 is large, sufficient arrangement space is provided to ensure that the distance between any two wire harnesses meets the standard distance for high-voltage electricity.

[0061] As the first sampling circuit board 11 extends forward, some wire harnesses are branched out, so the required wiring width decreases. In the case where the first opening 111 is provided, the effective width of the first sampling circuit board 11 can also meet the wire harness arrangement requirements.

[0062] It can be understood that the number of battery cells n determines the total number of wire harnesses required in the sampling circuit board. By defining the relationship between the distance L1 between the first opening 111 and the first end of the first sampling circuit board 11 and the number of battery cells n, it is ensured that the first sampling circuit board 11 has sufficient length and width at the undivided end near the first end to arrange enough wire harnesses.

[0063] Among them, the unit of the distance L1 is mm, and the value range of L1 / n is [3 mm / cell, 3.5 mm / cell]. Exemplarily, L1 / n can take values of 3 mm / cell, 3.1 mm / cell, 3.2 mm / cell, 3.3 mm / cell, 3.4 mm / cell, 3.5 mm / cell, or other values between 3 mm / cell and 3.5 mm / cell.

[0064] It can be understood that the setting relationship between the second sampling circuit board 12 and the second opening 121 can refer to the setting relationship between the first sampling circuit board 11 and the first opening 111, which will not be elaborated here.

[0065] Furthermore, since the first wiring terminal 113 and the second wiring terminal 123 are arranged along the second direction, at least one of the first sampling circuit board 11 and the second sampling circuit board 12 needs to be bent at the first end for easy connection to the corresponding wiring terminal. By leaving enough length at the part of the first sampling circuit board 11 and the second sampling circuit board 12 near the first end, it is convenient for connection to the wiring terminal.

[0066] Please refer to Figure 3 and Figure 5, according to some embodiments of the present application, the FPC structure further includes a connecting member 17 for connecting with the battery 2 box body. The first sampling circuit board 11 and the second sampling circuit board 12 are fixedly connected to the connecting member 17 by hot pressing, and the first terminal 113 and the second terminal 123 are arranged on the connecting member 17.

[0067] The connecting member 17 can be a plastic plate, which plays an insulating role and can provide sufficient supporting force. The first ends of the first sampling circuit board 11 and the second sampling circuit board 12 can be fixed on the plastic plate by hot pressing, and the first terminal 113 and the second terminal 123 are fixed on the plastic plate, so that the two terminals and the two sampling circuit boards are integrated into a whole, which is convenient for assembly and transportation.

[0068] Please refer to Figure 3 , according to some embodiments of the present application, at least one temperature sampling pin 15 is provided on the side of the first sampling circuit board 11 and the second sampling circuit board 12. A pressing member 16 is provided on the side of the first sampling circuit board 11 close to the battery cell group 21. The temperature sampling pin 15 is arranged on the lower side of the pressing member 16, and the pressing member 16 is used to press the temperature sampling pin 15 against the battery cell.

[0069] A thermistor is provided on the temperature sampling pin 15, and the temperature of the battery cell is collected by attaching the thermistor to the surface of the battery cell. Since both the first sampling circuit board 11 and the second sampling circuit board 12 are not resistant to high temperature, they are both arranged at intervals from the battery cell. By setting the pressing member 16, the temperature sampling pin 15 is pressed against the surface of the battery cell to ensure that the temperature of the battery cell can be accurately and stably obtained. The pressing member 16 can be clamped with the pole column of the battery cell to provide sufficient pressing force.

[0070] By providing a plurality of temperature sampling pins 15, the temperatures of the battery cells at different positions of the battery cell group 21 are obtained, so as to accurately judge the temperatures at various positions in the whole battery 2, improve the accuracy of control, and ensure the stability of the overall performance of the battery 2.

[0071] Please refer to Figure 1 and Figure 7 , an embodiment of the present application further provides a battery 2, which includes a battery cell group 21 and an FPC structure as described in any of the above technical solutions.

[0072] The battery cell group 21 includes a plurality of battery cells arranged along the first direction. The FPC structure is arranged on one side of the battery cell group 21, and a plurality of first sampling pins 112 and a plurality of second sampling pins 122 are respectively connected to the corresponding battery cells.

[0073] It should be noted that since the battery 2 in the embodiment of the present application includes the FPC structure of any of the above technical solutions, it has the technical features and beneficial effects of the FPC structure of any of the above technical solutions, which will not be elaborated here.

[0074] Among them, the battery 2 may include a plurality of battery cell groups 21, and a plurality of FPC structures are correspondingly provided for the plurality of battery cell groups 21.

[0075] The embodiment of the application also provides a vehicle, including the battery 2 as described above, and the battery 2 is used to provide electrical energy for the vehicle.

[0076] The vehicle in the embodiment of the present application includes the battery 2 of the above technical solution, so it has the technical features and beneficial effects of the battery 2 of the above technical solution, which will not be elaborated here.

[0077] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0078] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0079] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0080] In the description of the present application, the meaning of "a plurality" is two or more.

[0081] In the description of the present application, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through other features therebetween.

[0082] In the description of the present application, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature.

[0083] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An FPC structure, used for installation on one side of a battery pack, characterized in that: The FPC structure comprises: A first sampling circuit board extending along a first direction, wherein the first sampling circuit board is provided with a first opening for avoiding an explosion-proof valve on the battery cell; a second sampling circuit board extending along the first direction and overlapping with the first sampling circuit board, wherein the second sampling circuit board is provided with a second opening corresponding to the first opening; The length of the first sampling circuit board in the first direction is longer than that of the second sampling circuit board, a plurality of first sampling legs are provided on the non-overlapping portion of the first sampling circuit board and the second sampling circuit board, and a plurality of second sampling legs are provided on the second sampling circuit board.

2. The FPC structure according to claim 1, characterized in that: The first sampling circuit board is used to be fixedly connected to the battery cell, and the second sampling circuit board is arranged on a side of the first sampling circuit board away from the battery cell.

3. The FPC structure according to claim 2, characterized in that: A side of the first sampling circuit board facing away from the second sampling circuit board is provided with foam.

4. The FPC structure according to claim 1, characterized in that: The sides of the first sampling circuit board and the second sampling circuit board are both provided with widened portions extending in the direction, and the widened portions are suitable for being staggered with the bars on the battery cells, and the wiring harnesses of the first sampling circuit board and the second sampling circuit board are widened at the positions of the widened portions.

5. The FPC structure according to claim 1, characterized in that: The first ends of the first sampling circuit board and the second sampling circuit board in the first direction are respectively connected to a first wiring terminal and a second wiring terminal, and the first wiring terminal and the second wiring terminal are arranged side by side along the second direction.

6. The FPC structure according to claim 5, characterized in that: The first opening is spaced apart from the first end of the first sampling circuit board, and the spacing distance L1 is suitable for the number of cells n in the cell group to satisfy: 3mm / cell≤L1 / n≤3.5mm / cell; and / or, The second opening is spaced apart from the first end of the second sampling circuit board, and the spacing distance L2 is suitable to satisfy the number n of the battery cells in the battery cell group: 3 mm / cell≤L2 / n≤3.5 mm / cell.

7. The FPC structure according to claim 1, characterized in that: It also includes a connector for connecting to the battery box, the first sampling circuit board and the second sampling circuit board are fixedly connected to the connector by heat pressing, and the first wiring terminal and the second wiring terminal are arranged on the connector.

8. The FPC structure according to claim 1, characterized in that: At least one temperature sampling foot is provided on the side of the first sampling circuit board and the second sampling circuit board. A clamping piece is provided on the side of the first sampling circuit board close to the battery cell group. The temperature sampling foot is arranged on the lower side of the clamping piece. The clamping piece is used to press the temperature sampling foot onto the battery cell.

9. A battery, characterized in that: include: A battery cell group, comprising a plurality of battery cells arranged along a first direction; The FPC structure according to any one of claims 1 to 8 is arranged on one side of the battery cell group, and the plurality of the first sampling legs and the plurality of the second sampling legs are respectively connected to the plurality of the battery cells.

10. A vehicle, characterized in that: Comprising the battery as claimed in claim 9, the battery is used to provide electrical energy to the vehicle.

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