Battery sampling device, battery module and battery pack

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery sampling device, a battery module and a battery pack. The battery sampling device provided by the utility model comprises a plurality of flexible circuit boards and a plurality of acquisition chips, the plurality of flexible circuit boards are respectively and correspondingly arranged above different battery packs, and two adjacent flexible circuit boards are electrically connected through a jumper assembly. One flexible circuit board collects sampling data of at least part of batteries in the battery pack corresponding to the other flexible circuit board; any acquisition chip corresponds to one flexible circuit board, and the acquisition channels of any acquisition chip are electrically connected with the conductor lines in the corresponding flexible circuit board in a one-to-one correspondence manner. Through the arrangement, the acquisition channels of the acquisition chips can be fully utilized, and a certain number of acquisition chips can be saved in an application scene with a large number of battery packs, so that the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery sampling device, a battery module and a battery pack. Background Art

[0002] The battery management system (BMS) is the core part of the power battery, which realizes intelligent monitoring and management of the battery through the battery management unit (BMU).

[0003] Multiple acquisition chips are installed inside the BMU, and the battery voltage and other data are usually monitored through the acquisition chips. Currently, the commonly used acquisition chips are equipped with multiple acquisition channels. Each acquisition chip is electrically connected to a flexible circuit board on a battery pack. The flexible circuit board is connected to the sampling point of each battery in the battery pack, and is used to simultaneously collect voltage data and other data of multiple batteries in the battery pack. However, in actual use, since the number of acquisition channels of the acquisition chip is often greater than the number of batteries in the battery pack, the acquisition channels of the acquisition chip are not fully utilized, that is, a part of the acquisition channels of the acquisition chip are vacant and not effectively utilized. In the use scenario where there are a large number of battery packs in the battery pack, the number of corresponding acquisition chips used is large, resulting in high costs. Utility Model Content

[0004] In view of this, the utility model provides a battery sampling device, a battery module and a battery pack to solve the problem of underutilization of the acquisition channel of the acquisition chip.

[0005] In the first aspect, the utility model provides a battery sampling device, including multiple flexible circuit boards and multiple acquisition chips. Specifically, the multiple flexible circuit boards are respectively installed above different battery packs, and two adjacent flexible circuit boards are electrically connected through a jumper assembly, so that one of the flexible circuit boards collects sampling data of at least part of the batteries in the battery pack corresponding to the other flexible circuit board; any acquisition chip corresponds to one flexible circuit board, and the acquisition channel of any acquisition chip is electrically connected to the conductor line in the corresponding flexible circuit board one by one; wherein the number of acquisition channels of any acquisition chip is greater than the number of batteries in the battery pack.

[0006] Beneficial effects: By setting each acquisition chip to correspond to a flexible circuit board, and making the acquisition channel of any acquisition chip electrically connected to the conductor line in the corresponding flexible circuit board one by one, each acquisition chip can collect the sampling data of the batteries in the battery pack electrically connected to the corresponding flexible circuit board; when the number of acquisition channels of the acquisition chip is greater than the number of batteries in the battery pack, that is, after the acquisition chip has collected the sampling data of the batteries in one group of battery packs, a part of the acquisition channels will be vacated; by using a jumper assembly to electrically connect two adjacent flexible circuit boards, the vacated acquisition channels can collect the sampling data of at least part of the batteries in the battery pack corresponding to the other flexible circuit board. With such a setting, the acquisition channels of the acquisition chip can be fully utilized. Compared with the acquisition chips that are not fully utilized, in the application scenario with a large number of battery packs, a certain number of acquisition chips can be saved, thereby saving costs.

[0007] In an optional embodiment, two adjacent flexible circuit boards include a first flexible circuit board and a second flexible circuit board, the first flexible circuit board is arranged above the first battery pack and electrically connected to the first acquisition chip, and the second flexible circuit board is arranged above the second battery pack; wherein, the conductor line inside the first flexible circuit board includes a first conductor line and a second conductor line, the first conductor line is used to be electrically connected to the sampling points of at least some batteries in the first battery pack in a one-to-one correspondence, the second conductor line is electrically connected to the sampling points of at least some batteries in the second battery pack in a one-to-one correspondence through the jumper assembly, and the first conductor line and the second conductor line are both electrically connected to the first acquisition chip.

[0008] Beneficial effect: By arranging the first flexible circuit board above the first battery group, electrically connecting the first conductor line and the second conductor line of the first flexible circuit board to the first acquisition chip, and electrically connecting the first conductor line to the sampling points of at least some batteries in the first battery group in a one-to-one correspondence, and electrically connecting the second conductor line to the sampling points of at least some batteries in the second battery group in a one-to-one correspondence, the first acquisition chip can collect sampling data of at least some batteries in the first battery group and sampling data of at least some batteries in the second battery group, so that the acquisition channel of the first acquisition chip is fully utilized.

[0009] In an optional embodiment, a first pad is provided at one end of the second conductor line of the first flexible circuit board away from the first acquisition chip, a third conductor line is provided on the second flexible circuit board, a first end of the third conductor line is connected to a sampling point in the second battery pack, a second pad is provided at a second end of the third conductor line, and two ends of the jumper assembly are electrically connected to the first pad and the second pad, respectively.

[0010] Beneficial effect: By setting the first solder pad and the second solder pad, and making the jumper assembly electrically connected to the first solder pad and the second solder pad respectively, since the first solder pad is located on the first flexible circuit board and the second solder pad is located on the second flexible circuit board, the first flexible circuit board and the second flexible circuit board are connected, so that the first acquisition chip can collect sampling data of at least part of the battery corresponding to the second flexible circuit board, so that the acquisition channel of the first acquisition chip is fully utilized.

[0011] In an optional embodiment, the jumper assembly includes at least one conductive wire, and each of the conductive wires is provided with conductor pins at two ends, and the two conductor pins are respectively welded to the first soldering pad and the second soldering pad.

[0012] In an optional embodiment, the battery sampling device further includes a protective layer, and the protective layer is disposed above the first pad and the second pad.

[0013] Beneficial effect: By providing a protective layer above the first pad and the second pad, the solder joints on each pad are protected.

[0014] In an optional embodiment, the battery sampling device further includes a BMU module, a plurality of acquisition chips are arranged in the BMU module, and the BMU module is mounted on an end plate of the battery module.

[0015] In an optional embodiment, the battery sampling device also includes a plurality of connectors; a plurality of plug interfaces are provided on the BMU module, and the plurality of plug interfaces correspond one-to-one to the plurality of acquisition chips; the acquisition chip is electrically connected to the corresponding flexible printed circuit board through the plug interfaces and the connectors.

[0016] Beneficial effect: The acquisition chip is electrically connected to its corresponding flexible circuit board through the plug interface and the connector to achieve a quick plug connection. During installation, the acquisition chip and the flexible circuit board can be connected by simply inserting the connector into the plug interface, so that the acquisition chip can collect sampling data.

[0017] In an optional implementation, an overload protection component is provided on the conductor line of the flexible printed circuit board.

[0018] Beneficial effect: By providing an overload protection device in the conductor line, when a short circuit or abnormal surge current occurs in the conductor line, the path is cut off in time to protect the battery and electrical components connected to the flexible circuit board.

[0019] In a second aspect, the utility model provides a battery module, including the battery sampling device in the first aspect.

[0020] Beneficial effect: Since the battery module includes the battery sampling device, it has the same effect as the battery sampling device, which will not be described in detail here.

[0021] In a third aspect, the utility model further provides a battery pack, comprising the battery sampling device in the first aspect.

[0022] Beneficial effect: Since the battery pack includes the battery sampling device, it has the same effect as the battery sampling device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic diagram of the structure of the battery sampling device provided by the utility model arranged on a battery pack;

[0025] Figure 2 This is a schematic diagram of the structure of the battery sampling device provided by the utility model being arranged on a battery pack from another angle;

[0026] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure of part A;

[0027] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure of part B;

[0028] Figure 5 A schematic diagram of the connection between the first battery pack, the second battery pack, the first flexible circuit board, the second flexible circuit board and the acquisition chip provided by the utility model.

[0029] Description of reference numerals:

[0030] 1. flexible circuit board; 11. first flexible circuit board; 111. first conductor line; 112. second conductor line; 113. first pad; 12. second flexible circuit board; 121. third conductor line; 122. second pad;

[0031] 2. BMU module; 21. acquisition chip; 211. acquisition channel;

[0032] 3. Jumper assembly; 31. Wire; 32. Conductor pin;

[0033] 4. End plate;

[0034] 5. Connectors;

[0035] 6. Busbar;

[0036] 7. Isolation board;

[0037] 81. First battery pack; 811. Battery; 82. Second battery pack. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0039] In the description of the present application, it should be understood that the terms "upper", "inner", "bottom", "inside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present application.

[0040] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0043] In a first aspect, the present application provides a battery sampling device, such as Figures 1 to 5As shown, the battery sampling device includes a plurality of flexible circuit boards 1 and a plurality of acquisition chips 21. Specifically, the plurality of flexible circuit boards 1 are respectively installed above different battery packs, and two adjacent flexible circuit boards 1 are electrically connected through a jumper assembly 3, so that one of the flexible circuit boards 1 collects the sampling data of at least part of the batteries 811 in the battery pack corresponding to the other flexible circuit board 1; any acquisition chip 21 corresponds to a flexible circuit board 1, and the acquisition channel 211 of any acquisition chip 21 is electrically connected to the conductor line in the corresponding flexible circuit board 1 in a one-to-one correspondence; wherein, the number of acquisition channels 211 of any acquisition chip 21 is greater than the number of batteries 811 in the battery pack.

[0044] It should be noted that the "multiple" in the embodiment of the present application refers to two or more; the battery pack is formed by stacking multiple batteries 811, and two adjacent batteries 811 are connected in series or in parallel through Busbar6, such as Figure 1 As shown, two battery packs are arranged along the width direction of the battery module, and each battery pack is provided with a corresponding flexible circuit board 1. The embodiment of the present application is not limited thereto, and in other possible implementations, the battery module may include three or more battery packs, or the battery pack may be in a CTP structure.

[0045] Exemplarily, each flexible circuit board 1 includes an insulating layer and a conductor layer, wherein the conductor line is arranged in the conductor layer and located between two insulating layers so as to be insulated and protected by the insulating layer. Preferably, the insulating layer is made of PI film.

[0046] The flexible circuit board 1 is located above the battery pack. The embodiment of the present application does not limit its specific setting method. For example, an isolation plate 7 is set above the battery pack, and the flexible circuit board 1 is set above the isolation plate 7 to achieve electrical isolation between the flexible circuit board 1 and the battery 811, and the sampling pin of the flexible circuit board 1 (such as a nickel sheet or other form) is electrically connected to the Busbar 6 on the battery 811 to collect the voltage or temperature data of the battery 811.

[0047] By using the technical solution of this embodiment, each acquisition chip 21 is set corresponding to a flexible circuit board 1, and the acquisition channel 211 of any acquisition chip 21 is electrically connected to the conductor line in the corresponding flexible circuit board 1 one by one, so that each acquisition chip 21 can collect the sampling data of the battery 811 in the battery pack electrically connected to the corresponding flexible circuit board 1; when the number of acquisition channels 211 of the acquisition chip 21 is greater than the number of batteries 811 in the battery pack, that is, after the acquisition chip 21 completes the acquisition of the sampling data of the batteries 811 in one group of battery packs, a part of the acquisition channels 211 will be vacant; by using the jumper assembly 3 to electrically connect two adjacent flexible circuit boards 1, the vacant acquisition channels 211 can collect the sampling data of at least part of the batteries 811 in the battery pack corresponding to the other flexible circuit board 1. In this way, the acquisition channels 211 of the acquisition chip 21 can be fully utilized. Compared with the acquisition chips 21 that are not fully utilized, in the application scenario with a large number of battery packs, a certain number of acquisition chips 21 can be saved, thereby saving costs.

[0048] For example, Figures 1 to 5 As shown, two adjacent flexible circuit boards 1 include a first flexible circuit board 11 and a second flexible circuit board 12. The first flexible circuit board 11 is arranged above the first battery group 81 and is electrically connected to the first acquisition chip 21. The second flexible circuit board 12 is arranged above the second battery group 82. The conductor line inside the first flexible circuit board 11 includes a first conductor line 111 and a second conductor line 112. The first conductor line 111 is used to be electrically connected to the sampling points of at least some batteries 811 in the first battery group 81 in a one-to-one correspondence. The second conductor line 112 is electrically connected to the sampling points of at least some batteries 811 in the second battery group 82 in a one-to-one correspondence through the jumper assembly 3. The first conductor line 111 and the second conductor line 112 are both electrically connected to the first acquisition chip 21.

[0049] In the embodiment of the present application, the first flexible circuit board 11 uses the second conductor line 112 to collect the sampling data of some batteries 811 in the second battery group 82 as an example for introduction. In the second acquisition chip corresponding to the second flexible circuit board 12, if there is an empty acquisition channel 211, the empty conductor line in the second flexible circuit board 12 can also be connected to the battery sampling point in the third battery group through the jumper component 3, so as to collect the sampling data of at least some batteries 811 in the third battery group through the second flexible circuit board 12, and so on, which will not be repeated. In which, the third battery group is other battery groups in the battery pack, for example, it can be a battery group belonging to the same battery module as the second battery group 82, or it can be a battery group belonging to a different battery module from the second battery group 82, or it can be other battery groups in the CTP type battery pack.

[0050] By using the technical solution of this embodiment, the first flexible circuit board 11 is arranged above the first battery group 81, the first conductor line 111 and the second conductor line 112 of the first flexible circuit board 11 are electrically connected to the first acquisition chip 21, and the first conductor line 111 is electrically connected to the sampling points of at least some of the batteries 811 in the first battery group 81 in a one-to-one correspondence, and the second conductor line 112 is electrically connected to the sampling points of at least some of the batteries 811 in the second battery group 82 in a one-to-one correspondence, so that the first acquisition chip 21 can collect sampling data of at least some of the batteries 811 in the first battery group 81 and sampling data of at least some of the batteries 811 in the second battery group 82, so that the acquisition channel 211 of the first acquisition chip 21 is fully utilized.

[0051] The embodiment of the present application does not limit the connection method between the jumper assembly 3 and the two flexible circuit boards 1. By way of example, a first pad 113 is provided at one end of the second conductor line 112 of the first flexible circuit board 11 away from the first acquisition chip 21, a third conductor line 121 is provided on the second flexible circuit board 12, a first end of the third conductor line 121 is connected to a sampling point in the second battery pack 82, a second end of the third conductor line 121 is provided with a second pad 122, and both ends of the jumper assembly 3 are electrically connected to the first pad 113 and the second pad 122, respectively.

[0052] By using the technical solution of the present embodiment, a first pad 113 and a second pad 122 are provided, and the jumper assembly 3 is electrically connected to the first pad 113 and the second pad 122 respectively. Since the first pad 113 is located on the first flexible circuit board 11 and the second pad 122 is located on the second flexible circuit board 12, the first flexible circuit board 11 and the second flexible circuit board 12 are connected, so that the first acquisition chip 21 can collect sampling data of at least part of the battery 811 corresponding to the second flexible circuit board 12, so that the acquisition channel 211 of the first acquisition chip 21 is fully utilized.

[0053] Furthermore, there is no specific limitation on the manner in which each conductor line is arranged on the circuit board, for example, it can be etched or die-cut.

[0054] like Figure 1 , Figure 2 and Figure 4 As shown, the jumper assembly 3 includes at least one wire 31 , and conductor pins 32 are provided at both ends of each wire 31 , and the two conductor pins 32 are respectively welded to the first pad 113 and the second pad 122 .

[0055] It should be noted that the number of wires 31 in the jumper assembly 3 can be selected according to actual conditions. For example, there may be one or more second conductor lines 112. Accordingly, there may be one or more wires 31 in the jumper assembly 3, and the wires 31 in the jumper assembly 3 are respectively connected to the second conductor lines 112 one by one to ensure the normal operation of the acquisition circuit.

[0056] Furthermore, in the present application, the battery sampling device also includes a protective layer, which is disposed above the first pad 113 and the second pad 122 .

[0057] By utilizing the technical solution of the present embodiment, after the conductor pins 32 of the jumper assembly 3 are respectively connected to the first solder pad 113 and the second solder pad 122, a protective layer is provided above the first solder pad 113 and the second solder pad 122 to protect the solder joints on each solder pad, prevent the solder joints from being damaged, and avoid oxidation and erosion of the solder joints by moisture and water, thereby extending their service life.

[0058] like Figures 1 to 3 As shown, the battery sampling device further includes side plates, and two oppositely disposed end plates 4 and two oppositely disposed side plates enclose a mounting cavity for mounting a battery pack.

[0059] It can be explained that, in this embodiment, the battery sampling device further includes a BMU module 2 , a plurality of acquisition chips 21 are arranged in the BMU module 2 , and the BMU module 2 is mounted on the end plate 4 .

[0060] Still Figures 1 to 3 As shown, the battery sampling device also includes multiple connectors 5; the BMU module 2 is provided with multiple plug interfaces, and the multiple plug interfaces correspond one-to-one to multiple acquisition chips 21; the acquisition chip 21 is electrically connected to the corresponding flexible circuit board 1 through the plug interface and the connector 5.

[0061] By utilizing the technical solution of this embodiment, the acquisition chip 21 is electrically connected to the corresponding flexible circuit board 1 through the plug interface and the connector 5 to achieve a quick plug connection. During installation, the acquisition chip 21 and the flexible circuit board 1 can be connected by simply inserting the connector 5 into the plug interface.

[0062] It can be explained that an overload protection component is provided on the conductor line of the flexible circuit board 1 .

[0063] By utilizing the technical solution of this embodiment, an overload protection device is provided in the conductor line. When a short circuit or abnormal surge current occurs in the conductor line, the path is cut off in time to protect the battery 811 and electrical components connected to the flexible circuit board 1.

[0064] It should be noted that the battery sampling device provided in the present application does not specifically limit the overload protection component. Preferably, the overload protection component is a fuse.

[0065] Optionally, the battery sampling device further includes a temperature detection component, which is mounted on the flexible circuit board 1 .

[0066] By utilizing the technical solution of this embodiment and arranging a temperature detection component on the flexible circuit board 1 , the battery sampling device is provided with the capability of temperature detection.

[0067] It can be explained that there is no specific limitation on the options of the temperature detection element.

[0068] As one implementation method, the temperature detection component is selected as an NTC thermistor. In this case, the thermistor is set in the conductor path to collect temperature data of the battery 811.

[0069] It can be explained that, in the above embodiment, the sampling data is not specifically limited. Preferably, the sampling data collected by the acquisition chip 21 is voltage data.

[0070] In a second aspect, the present application provides a battery module, comprising the battery sampling device in the first aspect.

[0071] In a third aspect, the present application also provides a battery pack, comprising the battery sampling device in the first aspect.

[0072] It can be explained that the battery pack provided in the present application may include multiple battery groups and the battery sampling device in the first aspect, or the battery pack provided in the present application may include multiple battery modules as described in the second aspect, and not only the flexible circuit board 1 in each battery module can be connected through the jumper assembly 3, but the flexible circuit boards 1 between multiple battery modules can also be connected through the jumper assembly 3.

[0073] The battery pack provided in the present application is described by way of example. For example, currently, the number of batteries 811 in a single battery pack is often 12, 14 or 16 strings, and the acquisition chip 21 can acquire the voltages of 18 strings of batteries 811 at most.

[0074] Furthermore, an example is given in which the acquisition chip 21 has 18 acquisition channels and each battery pack includes 14 strings of batteries 811. The batteries 811 of the first battery pack are connected to the 14 sampling points on the flexible circuit board 1, and the 4 vacant sampling points are used to connect the 4 batteries 811 in the next battery pack. After the two flexible circuit boards 1 are electrically connected through the jumper assembly 3, the acquisition chip 21 can collect the sampling data of all the batteries 811 in the first battery pack and the voltage of the 4 batteries 811 in the next battery pack. In this way, the 8 vacant acquisition channels 211 of the second acquisition chip 21 are used to connect the 8 batteries 811 in the third battery pack. The sequential arrangement can improve the utilization of the acquisition channels 211 inside each acquisition chip 21. When multiple battery packs are provided in the battery 811 package, one or more acquisition chips 21 can be saved. In this way, the cost can be saved.

[0075] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery sampling device, characterized in that: include: A plurality of flexible circuit boards (1), wherein the plurality of flexible circuit boards (1) are respectively mounted on different battery packs, and two adjacent flexible circuit boards (1) are electrically connected via a jumper assembly (3) so that one of the flexible circuit boards (1) collects sampling data of at least part of the batteries (811) in the battery pack corresponding to the other flexible circuit board (1); A plurality of acquisition chips (21), each acquisition chip (21) corresponds to one of the flexible circuit boards (1), and the acquisition channels (211) of each acquisition chip (21) are electrically connected to the conductor lines in the corresponding flexible circuit boards (1) in a one-to-one correspondence; The number of acquisition channels (211) of any acquisition chip (21) is greater than the number of batteries (811) in the battery pack.

2. The battery sampling device according to claim 1, characterized in that: Two adjacent flexible circuit boards (1) comprise a first flexible circuit board (11) and a second flexible circuit board (12), wherein the first flexible circuit board (11) is arranged above the first battery group (81) and is electrically connected to the first acquisition chip (21), and the second flexible circuit board (12) is arranged above the second battery group (82); The conductor lines inside the first flexible circuit board (11) include a first conductor line (111) and a second conductor line (112); the first conductor line (111) is used to be electrically connected to the sampling points of at least some of the batteries (811) in the first battery pack (81) in a one-to-one correspondence; the second conductor line (112) is electrically connected to the sampling points of at least some of the batteries (811) in the second battery pack (82) in a one-to-one correspondence through the jumper assembly (3); and the first conductor line (111) and the second conductor line (112) are both electrically connected to the first acquisition chip (21).

3. The battery sampling device according to claim 2, characterized in that: A first soldering pad (113) is provided at one end of the second conductor line (112) of the first flexible circuit board (11) away from the first acquisition chip (21); a third conductor line (121) is provided on the second flexible circuit board (12); a first end of the third conductor line (121) is connected to a sampling point in the second battery pack (82); a second end of the third conductor line (121) is provided with a second soldering pad (122); and two ends of the jumper assembly (3) are electrically connected to the first soldering pad (113) and the second soldering pad (122) respectively.

4. The battery sampling device according to claim 3, characterized in that: The jumper assembly (3) comprises at least one wire (31), each of the two ends of the wire (31) being provided with conductor pins (32), and the two conductor pins (32) are respectively welded and connected to the first soldering pad (113) and the second soldering pad (122).

5. The battery sampling device according to claim 3, characterized in that: It also includes a protective layer, which is arranged above the first pad (113) and the second pad (122).

6. The battery sampling device according to any one of claims 1 to 5, characterized in that: The battery (811) sampling device further comprises a BMU module (2), wherein a plurality of acquisition chips (21) are arranged in the BMU module (2), and the BMU module (2) is mounted on an end plate (4) of the battery (811) module.

7. The battery sampling device according to claim 6, characterized in that: The battery (811) sampling device further comprises a plurality of connectors (5); The BMU module (2) is provided with a plurality of plug interfaces, and the plurality of plug interfaces correspond one-to-one to the plurality of acquisition chips (21); The acquisition chip (21) is electrically connected to the corresponding flexible circuit board (1) via the plug interface and the plug connector (5).

8. The battery sampling device according to any one of claims 1 to 5, characterized in that: An overload protection component is provided on the conductor line of the flexible circuit board (1).

9. A battery module, characterized in that: The invention comprises a plurality of battery packs and a battery sampling device as claimed in any one of claims 1 to 8.

10. A battery pack, characterized in that: The invention comprises a plurality of battery packs and a battery sampling device as claimed in any one of claims 1 to 8.

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