Battery signal acquisition device and energy storage system

Abstract

The utility model discloses a battery signal acquisition device and an energy storage system, the battery signal acquisition device comprises a plurality of battery packs, the battery signal acquisition device comprises a BIC acquisition board, and the BIC acquisition board is electrically connected with a battery management system and one of the battery packs so as to be used for acquiring a battery signal of one of the battery packs; a battery signal of one battery pack is sent to the battery management system; and at least one FPC circuit board, each FPC circuit board is connected with other battery packs except one battery pack in the battery in a one-to-one correspondence manner, each FPC circuit board is electrically connected with the BIC acquisition board so as to be used for acquiring battery signals of other battery packs, and the BIC acquisition board forwards the battery signals of other battery packs. By adopting the battery signal acquisition device, the acquisition of battery signals of a plurality of battery packs can be realized, the cost of the battery signal acquisition device is lower, the assembly efficiency is higher, and the FPC circuit board is not easy to lose.

Description

Technical Field

[0001] The utility model relates to the field of battery energy storage, in particular to a battery signal acquisition device and an energy storage system. Background Art

[0002] In the related art, when the existing battery signal acquisition device acquires battery signals of multiple battery packs, each battery pack uses an FPC (Flexible Printed Circuit) circuit board to acquire battery signals, and each FPC circuit board is then connected to a BIC acquisition board. However, each FPC circuit board of each battery pack requires a separate adapter harness to be connected to the BIC acquisition board, which has the disadvantages of too many adapter harnesses, high cost, complex installation, and easy wear of the FPC circuit board; or each battery pack uses a PCB (Printed Circuit Board) to acquire battery signals, and each PCB is then connected to a BIC acquisition board, but each PCB of each battery pack requires a separate adapter harness to be connected to the BIC acquisition board, which has the disadvantages of too many adapter harnesses, high cost, and complex installation; or each battery pack uses a CCS (Cells Contact System, integrated busbar) to acquire battery signals, but the temperature resistance of CCS is poor, which will cause the CCS to lose control in the battery pack and fail to continuously monitor and acquire battery signals. Therefore, the above methods will lead to the problem of high cost and complex assembly process of the battery signal acquisition device. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery signal acquisition device, which can realize the acquisition of battery signals of multiple battery packs, and the battery signal acquisition device has lower cost, higher assembly efficiency, and the FPC circuit board is not easy to wear.

[0004] A second purpose of the present invention is to provide an energy storage system.

[0005] In order to solve the above problems, the first aspect of the utility model provides a battery signal acquisition device for a battery, wherein the battery includes multiple battery packs, and the battery signal acquisition device includes: a BIC acquisition board, wherein the BIC acquisition board is electrically connected to a battery management system and one of the battery packs in the battery to collect battery signals of the one of the battery packs and send the battery signals of the one of the battery packs to the battery management system; at least one FPC circuit board, wherein each FPC circuit board is respectively connected one-to-one with the other battery packs in the battery except the one of the battery packs, and each FPC circuit board is electrically connected to the BIC acquisition board to collect battery signals of the other battery packs, and the battery signals of the other battery packs are forwarded by the BIC acquisition board.

[0006] According to the battery signal acquisition device of the present invention, the battery signal of each battery pack is respectively acquired through the BIC acquisition board and multiple FPC circuit boards, and then the BIC acquisition board sends the battery signal of each battery pack to the battery management system to complete the acquisition of battery signals of multiple battery packs. Therefore, compared with the existing device that realizes battery signal acquisition through FPC circuit boards or PCBs or CCS, the present application realizes battery signal acquisition of multiple battery packs by combining the FPC circuit board 20 with the BIC acquisition board 10, which can save signal acquisition circuit boards and adapter harnesses, thereby effectively reducing the cost of the battery signal acquisition device, improving the assembly efficiency of the battery signal acquisition device, and optimizing or reducing the space required for the layout of the battery signal acquisition device.

[0007] In some embodiments, the battery pack includes multiple bus bars, and the BIC acquisition board includes: a signal acquisition board body, which is used to transmit battery signals; multiple first nickel sheets, which are arranged on the signal acquisition board body, and each first nickel sheet is arranged one-to-one corresponding to each bus bar, so as to collect the voltage signal of one of the battery packs.

[0008] In some embodiments, the BIC acquisition board further includes: at least one first temperature sensor, wherein the first temperature sensor is disposed on the signal acquisition board body to acquire a temperature signal of one of the battery packs.

[0009] In some embodiments, the BIC acquisition board further includes: at least one first connector, the first connector is arranged on the signal acquisition board body, and each first connector is used to electrically connect to the corresponding FPC circuit board.

[0010] In some embodiments, the BIC acquisition board further includes: a second connector, the second connector is disposed on the signal acquisition board body, and the second connector is used to electrically connect to the battery management system via a cascade line.

[0011] In some embodiments, the battery pack includes multiple bus bars, and each FPC circuit board includes: a circuit board body, which is used to transmit battery signals of the other battery packs; and multiple second nickel sheets, which are arranged on the circuit board body, and each second nickel sheet is arranged one-to-one with each bus bar to collect voltage signals of the other battery packs.

[0012] In some embodiments, each FPC circuit board further includes: at least one second temperature sensor, wherein the second temperature sensor is disposed on the circuit board body to collect temperature signals of the other battery packs.

[0013] In some embodiments, the temperature sensor is an NTC type temperature sensor.

[0014] In some embodiments, the battery includes a first battery group and a second battery group, and the first battery group and the second battery group are stacked; the BIC acquisition board is laid on the top of the first battery group, and the BIC acquisition board is electrically connected to the first battery group to collect the battery signal of the first battery group, and the battery signal of the first battery group is sent to the battery management system; the FPC circuit board is laid between the first battery group and the second battery group, and the FPC circuit board is electrically connected to the second battery group to collect the battery signal of the second battery group, and the battery signal of the second battery group is forwarded by the BIC acquisition board.

[0015] The second aspect of the utility model provides an energy storage system, including: a battery management system; a battery, wherein the battery includes a plurality of battery packs; and the battery signal acquisition device described in the above embodiment, wherein the battery signal acquisition device is connected to the battery pack and the battery management system.

[0016] According to the energy storage system of the embodiment of the utility model, the battery signal acquisition device of the above embodiment can realize the acquisition of battery signals of multiple battery packs, and the battery signal acquisition device has lower cost and higher assembly efficiency, and the FPC circuit board is not easily damaged.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a battery signal acquisition device according to an embodiment of the utility model;

[0020] Figure 2 is a schematic diagram of a signal acquisition board according to an embodiment of the utility model;

[0021] Figure 3 is a schematic diagram of a battery according to an embodiment of the utility model;

[0022] Figure 4 is a schematic diagram of a signal acquisition board according to another embodiment of the utility model;

[0023] Figure 5 is a schematic diagram of a battery signal acquisition device according to another embodiment of the utility model;

[0024] Figure 6 is a schematic diagram of a battery signal acquisition device according to another embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of an energy storage system according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] Energy storage system 1000;

[0028] Battery signal acquisition device 100; battery management system 200; battery 300;

[0029] BIC acquisition board 10; FPC circuit board 20; battery pack 30; first battery pack 31; second battery pack 32;

[0030] Signal acquisition board 1; first nickel sheet 2; bus bar 3; first temperature sensor 4; first connector 5; second connector 6; circuit board 7; second nickel sheet 8. DETAILED DESCRIPTION

[0031] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0032] In order to solve the above problems, the first embodiment of the utility model proposes a battery signal acquisition device, which can realize the acquisition of battery signals of multiple battery packs, and the battery signal acquisition device has lower cost, higher assembly efficiency, and the FPC circuit board is not easily damaged.

[0033] The battery signal acquisition device according to an embodiment of the utility model is described below with reference to the accompanying drawings. Figure 1 As shown, the battery signal acquisition device 100 includes a BIC acquisition board 10 , a plurality of FPC circuit boards 20 and a plurality of battery packs 30 .

[0034] Among them, the BIC acquisition board 10 is electrically connected to the battery management system 200 and one of the battery groups in the battery 300 to collect the battery signal of one of the battery groups and send the battery signal of one of the battery groups to the battery management system 30; each FPC circuit board 20 is respectively connected to the other battery groups except one of the battery groups in the battery 300 in a one-to-one correspondence, and each FPC circuit board 20 is electrically connected to the BIC acquisition board 10 to collect the battery signals of other battery groups, and the BIC acquisition board 10 forwards the battery signals of other battery groups.

[0035] It should be noted that the FPC circuit board 20 can be one or more and can be configured according to the actual number of battery packs 30, and no specific limitation is made here.

[0036] Specifically, in order to solve the above problem, when collecting battery signals of multiple battery packs 30, the battery signal acquisition device 100 in the present application collects the battery signal of one of the battery packs in the battery 300 through the BIC acquisition board 10, and the remaining battery packs collect the corresponding battery signals through the FPC circuit board 20, instead of using multiple FPC circuit boards 20 to collect battery signals for all battery packs 30, which can save FPC circuit boards 20 and adapter harnesses. Therefore, under the premise of ensuring the perfection of the battery signal acquisition function, the problems of high acquisition cost and complicated assembly process of multiple battery packs 30 can be solved. Therefore, compared with the existing device that collects battery signals through FPC circuit board 20 or PCB or CCS, the present application realizes battery signal collection of multiple battery packs by combining FPC circuit board 20 with BIC collection board 10, which can save signal collection circuit board and adapter harness, thereby effectively reducing the cost of battery signal collection device 100, improving the assembly efficiency of battery signal collection device 100, and optimizing or reducing the space required for the layout of battery signal collection device. In addition, FPC circuit board 20 and BIC collection board have the advantage of temperature resistance, so that battery signals can be continuously monitored and collected when battery pack 30 is out of control.

[0037] Exemplarily, the BIC acquisition board 10 is electrically connected to one of the battery packs in the battery 300, and each FPC circuit board 20 is respectively connected one-to-one with the other battery packs in the battery 40 except one of the battery packs. Each FPC circuit board 20 is electrically connected to the BIC acquisition board 10. Based on this, when collecting battery signals of multiple battery packs 30, the BIC acquisition board 10 collects the battery signal of one of the battery packs in the battery, wherein the battery signal includes a voltage signal and a temperature signal, and sends the battery signal of the battery pack to the battery management system 200. Multiple FPC circuit boards 20 respectively collect battery signals of other battery packs in the battery, and send the battery signals of other battery packs to the BIC acquisition board 10. The BIC acquisition board 10 forwards the battery signals of other battery packs to the battery management system 200, thereby realizing the battery signal collection of multiple battery packs 30.

[0038] Exemplarily, the battery pack 30 includes two battery packs, and the battery signal acquisition device 100 includes a BIC acquisition board 10 and an FPC circuit board 20. The BIC acquisition board 10 acquires the battery signal of the upper battery pack and sends the battery signal of the upper battery pack to the battery management system 200. The FPC circuit board acquires the battery signal of the lower battery pack and sends it to the BIC acquisition board 10. The BIC acquisition board 10 then forwards the received battery signal of the lower battery pack to the battery management system 200, thereby completing the acquisition of battery signals of multiple battery packs 30.

[0039] According to the battery signal acquisition device of the present invention, the battery signal of each battery pack 30 is respectively acquired through the BIC acquisition board 10 and multiple FPC circuit boards 20, and then the BIC acquisition board 10 sends the battery signal of each battery pack 30 to the battery management system 200 to complete the acquisition of battery signals of multiple battery packs 30. Therefore, compared with the existing device that realizes battery signal acquisition through FPC circuit boards 20 or PCB or CCS, the present application realizes battery signal acquisition of multiple battery packs 30 through the combination of FPC circuit boards 20 and BIC acquisition boards 10, which can save signal acquisition circuit boards and adapter harnesses, thereby effectively reducing the cost of the battery signal acquisition device 100, improving the assembly efficiency of the battery signal acquisition device 100, and optimizing or reducing the space required for the layout of the battery signal acquisition device.

[0040] In some embodiments, reference Figure 2 and Figure 3 As shown, the BIC acquisition board 10 includes a signal acquisition board body 1 and a plurality of first nickel sheets 2 , and the battery pack includes a plurality of bus bars 3 .

[0041] Among them, the signal acquisition board 1 is used to transmit the battery signal, the first nickel sheet 2 is arranged on the signal acquisition board 1, and each first nickel sheet 2 is arranged in a one-to-one correspondence with each bus bar 3, so as to collect the voltage signal of one of the battery packs, wherein each first nickel sheet 2 is connected to each bus bar 3 by welding, and the welding method between the first nickel sheet 2 and the bus bar 3 can be laser welding, ultrasonic welding, tin welding, etc. The battery pack 30 includes a plurality of battery cells, and each bus bar 3 is connected to the end plate of each battery cell by welding, and the welding method between each bus bar 3 and the end plate of each battery cell can be laser welding, ultrasonic welding, tin welding, etc. It should be noted that the plurality of bus bars 3 at least include a positive bus bar of the battery pack and a negative bus bar of the battery pack, the positive bus bar of the battery pack is connected to the positive electrode of the battery pack 30, and the negative bus bar of the battery pack 30 is connected to the negative electrode of the battery pack 30. The number of bus bars 3 can be increased according to the actual design of the battery pack, and no specific restrictions are made here.

[0042] Specifically, each first nickel sheet 2 is connected to each battery cell of the battery pack through the corresponding bus 3 to collect the voltage signal of each battery cell. Thus, the BIC acquisition board 10 collects the voltage signal of the battery pack 30 through multiple first nickel sheets 2, and the signal acquisition board 1 transmits the voltage signal of the battery pack to the battery management system 200. Thus, the voltage signal is collected through the bus 3 and the first nickel sheet 2.

[0043] In some embodiments, reference Figure 4 As shown, the BIC acquisition board 10 also includes at least one first temperature sensor 4 .

[0044] The first temperature sensor 4 is disposed on the signal acquisition board 1 to collect the temperature signal of one of the battery packs. The first temperature sensor 4 can be a board-mounted NTC (Negative Temperature Coefficient, negative temperature coefficient thermistor), a thin film NTC or a thermocouple sensor.

[0045] Specifically, the existing battery signal acquisition device 100 is transferred to the BIC acquisition board 10 through the temperature sampling harness to collect the temperature of the battery pack 30. For example, when each battery pack 30 uses a PCB to collect battery signals, the PCB light board cannot directly sample the temperature of the battery pack 30, but requires an additional temperature sampling harness to achieve this, which increases the cost of the battery signal acquisition device 100. In order to solve this problem, in the present application, at least one first temperature sensor 4 is directly integrated on the signal acquisition board 1 to collect the temperature signal of one of the battery packs 30, thereby eliminating the need to transfer to the BIC acquisition board 10 through the temperature sampling harness, reducing the use of the temperature sampling harness, and effectively saving the cost of the battery signal acquisition device 100.

[0046] Exemplarily, the first temperature sensor can be an onboard NTC (Negative Temperature Coefficient, negative temperature coefficient thermistor). Taking the onboard NTC as an example, the onboard NTC refers to an NTC thermistor installed on the signal acquisition board 1, and the onboard NTC can be directly installed on the signal acquisition board 1 by welding or other means to collect the temperature signal of one of the battery packs 30. Therefore, in this application, the onboard NTC function of the BIC acquisition board 10 can reduce the use of the temperature sampling harness, thereby effectively saving the cost of the battery signal acquisition device 100.

[0047] In addition, it should be noted that the number of the first temperature sensors 4 is not specifically limited. The number of the first temperature sensors 4 can be set based on actual needs. For example, the number of the first temperature sensors 4 is set according to cost and detection accuracy, and the setting positions of the first temperature sensors 4 may also be different based on the number of first temperature sensors 4. No specific limitation is made here. For example, considering the cost, the number of the first temperature sensor 4 is set to one, and one first temperature sensor can be set in the middle position of the signal acquisition board 1; or in order to improve the detection accuracy, the number of the first temperature sensors 4 is set to multiple, and the first temperature sensors 4 can be evenly set on the signal acquisition board 1, or each first temperature sensor 4 can be set at the middle position corresponding to two or three battery cells to improve the temperature detection accuracy of the BIC acquisition board 10.

[0048] In some embodiments, reference Figure 2 As shown, the BIC acquisition board also includes at least one first connector 5.

[0049] Among them, the first connector 5 is arranged on the signal acquisition board body 1, and each first connector 5 is used to electrically connect to the corresponding FPC circuit board 20. That is to say, the FPC circuit boards 20 corresponding to the other battery packs except one of the battery packs in the battery 40 are electrically connected to the BIC acquisition board through each first connector 5, respectively. Based on this, when collecting battery signals of multiple battery packs, multiple FPC circuit boards 20 respectively collect battery signals of other battery packs in the battery, and send the battery signals of other battery packs to the BIC acquisition board 10, and then the BIC acquisition board 10 forwards the battery signals of other battery packs to the battery management system 200.

[0050] Specifically, in the related art, when collecting battery signals of multiple battery packs, the FPC circuit board of each battery pack needs a separate adapter harness to be connected to the BIC, and there are multiple plug-ins on the adapter harness, which leads to too many adapter harnesses and plug-ins, thereby increasing the cost of the battery signal acquisition device, the complexity of installation, and the loss of the FPC circuit board. In order to solve the above problems, in this application, the flexible characteristics of the FPC circuit board 20 are utilized, and each FPC circuit board 20 is directly connected to the BIC acquisition board 10 through the first connector 5, so as to save the adapter harness between the BIC acquisition board 10 and the FPC circuit board 20 and the multiple plug-ins on the adapter harness, thereby reducing the cost of the battery signal acquisition device, the complexity of installation, and the loss of the FPC circuit board. Therefore, in this application, the flexible characteristics of the FPC circuit board 20 are utilized, and the first connector is used to directly connect the FPC circuit board to the BIC acquisition board, so as to save the adapter harness and the multiple plug-ins on the adapter harness, and at the same time reduce the material loss rate caused by the installation and fixation of the adapter harness plug-in, and the assembly process is simple.

[0051] In addition, the first connector 5 can be arranged at the edge of the signal acquisition board or other positions of the signal acquisition board, and there is no limitation on this. Figure 2 and Figure 4 As shown, the first connector 5 can be arranged on the right side of the signal acquisition board 1 to facilitate direct connection of the FPC circuit board 20.

[0052] In some embodiments, reference Figure 2 As shown, the BIC acquisition board 10 also includes a second connector 6 .

[0053] Among them, the second connector 6 is arranged on the signal acquisition board 1, and the second connector 6 is used to electrically connect the battery management system 200 through the cascade line. That is to say, the BIC acquisition board 10 is connected to the battery management system 200 through the cascade line and the second connector 6, and the BIC acquisition board 10 and the battery management system 200 can communicate with each other. Based on this, the BIC acquisition board 10 sends the battery signal of one of the collected battery groups to the battery management system 200, and forwards the battery signals of other battery groups to the battery management system 200, thereby realizing the collection of battery signals of the battery management system 200.

[0054] In addition, it should be noted that the second connector 6 can be arranged at the edge of the signal acquisition board 1 or at other positions of the signal acquisition board, and there is no limitation on this. Figure 2 and Figure 5 As shown, the second connector 6 is arranged on the left side of the signal acquisition board 1.

[0055] In some embodiments, Figure 3 As shown, the battery pack includes a plurality of bus bars 3, such as Figure 5As shown, each FPC circuit board 20 includes a circuit board body 7 and a plurality of second nickel sheets 8 .

[0056] Among them, the circuit board body 7 is used to transmit battery signals of other battery packs, the second nickel sheet 8 is arranged on the circuit board body 7, and each second nickel sheet is arranged one-to-one corresponding to each bus 3, so as to collect voltage signals of other battery packs, wherein each second nickel sheet 8 is connected to each bus 3 by welding, and the welding method between the second nickel sheet 8 and the bus 3 can be laser welding, ultrasonic welding, tin soldering, etc.

[0057] In some embodiments, each FPC circuit board 20 further includes at least one second temperature sensor.

[0058] The second temperature sensor is arranged on the circuit board body 7 to collect temperature signals of other battery packs. The second temperature sensor can be a board-mounted NTC, a thin-film NTC or a thermocouple sensor.

[0059] Exemplarily, the second temperature sensor can be an onboard NTC, which refers to an NTC thermistor installed on the circuit board body 7, and the onboard NTC can be directly installed on the circuit board body 7 by welding or other means to collect the temperature signal of one of the battery packs. Therefore, in this application, the onboard NTC function of the FPC circuit board 20 can reduce the use of temperature sampling harnesses, thereby effectively saving the cost of the battery signal acquisition device.

[0060] In addition, it should be noted that the number of second temperature sensors is not specifically limited. The number of second temperature sensors can be set based on actual needs. For example, the number of second temperature sensors can be set according to cost and detection accuracy, and the setting positions of the second temperature sensors can also be different based on the number of second temperature sensors. No specific limitation is made here. For example, considering the cost, the number of second temperature sensors is set to one, and one second temperature sensor can be set in the middle position of the circuit board body 7; or in order to improve the detection accuracy, the number of second temperature sensors is set to multiple, and the second temperature sensors can be evenly set on the circuit board body 7, or each second temperature sensor can be set at the middle position corresponding to two or three battery cells to improve the temperature detection accuracy of the FPC circuit board 20.

[0061] In some embodiments, the temperature sensor is an NTC type temperature sensor, wherein the NTC type temperature sensor can be directly welded to the signal acquisition board to save the adapter harness between the BIC acquisition board 10 and the FPC circuit board 20 and multiple plug-ins on the adapter harness, thereby reducing the cost of the battery signal acquisition device.

[0062] In some embodiments, reference Figure 6As shown, the battery 300 includes a first battery pack 31 and a second battery pack 32 .

[0063] The first battery pack 31 and the second battery pack 32 are stacked. Figure 5 As shown, the BIC acquisition board 10 is laid on the top of the first battery group 31, and the BIC acquisition board 10 is electrically connected to the first battery group 31, so as to collect the battery signal of the first battery group 31, and send the battery signal of the first battery group 31 to the battery management system 200; the FPC circuit board 20 is laid between the first battery group 31 and the second battery group 32, and the FPC circuit board 20 is electrically connected to the second battery group 32, so as to collect the battery signal of the second battery group 432, and the battery signal of the second battery group 32 is forwarded by the BIC acquisition board 10.

[0064] In some embodiments, Figure 1 As shown, based on the flexible characteristics of the FPC circuit board 20, the FPC circuit board 20 can be flexibly arranged in a complex multi-battery group layout. The first part of the FPC circuit board 20 is laid between the first battery group 31 and the second battery group 32, and the second part of the FPC circuit board 20 is bent perpendicular to the first part, and the second part is attached to the side of the first battery group 31, so that the FPC circuit board 20 can be directly plugged into the BIC acquisition board 10 on the surface of the first battery group 31. Therefore, in the present application, when the battery signal acquisition of multiple battery groups is realized by the BIC acquisition board 10 and the FPC circuit board 20, the flexible characteristics of the FPC circuit board are utilized to optimize or reduce the space required for the layout of the battery signal acquisition device 100, and the assembly process is simple.

[0065] Specifically, the BIC acquisition board 10 acquires the battery signal of the first battery group and sends the battery signal of the first battery group to the battery management system. The FPC circuit board 20 acquires the battery signal of the second battery group 32 and sends the battery signal of the second battery group 32 to the BIC acquisition board 10. The BIC acquisition board 10 forwards the battery signal of the second battery group 32 to the battery management system. Therefore, in the present application, by combining the BIC acquisition board 10 and the FPC circuit board 20 and utilizing the flexible characteristics of the FPC circuit board 20, the battery signal sampling of the double-layer battery pack can be achieved while reducing the adapter harness and the adapter harness plug-in and reducing the material cost.

[0066] In some embodiments, the battery 300 includes a plurality of battery packs 30 , and the plurality of battery packs 30 are stacked so that the battery 300 includes a plurality of battery packs 30 .

[0067] In an embodiment, when the battery includes three battery groups, the three battery groups are stacked, the first part of the first FPC circuit board is laid between the first battery group 31 and the second battery group 32, the second part of the first FPC circuit board is bent perpendicular to the first part, and the second part is attached to the side of the first battery group, so that the first FPC circuit board can be directly plugged into the BIC acquisition board 10 on the surface of the first battery group 31, the first part of the second FPC circuit board is laid between the second battery group 32 and the third battery group, the second part of the second FPC circuit board is bent perpendicular to the first part, and the second part is attached to the side of the first battery group 31 and the second battery group 32, so that the first FPC circuit board 20 can be directly plugged into the BIC acquisition board 10 on the surface of the first battery group 31, that is, the first FPC circuit board collects the battery signal of the second battery group 32, and the second FPC circuit board collects the battery signal of the third battery group.

[0068] Based on this, taking three battery packs as an example, the BIC acquisition board 10 acquires the battery signal of the first battery pack, and sends the battery signal of the first battery pack 31 to the battery management system 200, the first FPC circuit board acquires the battery signal of the second battery pack 32, and sends the battery signal of the second battery pack 32 to the BIC acquisition board 10, the second FPC circuit board acquires the battery signal of the third battery pack, and the BIC acquisition board 10 forwards the battery signals of the second battery pack 32 and the third battery pack to the battery management system. Therefore, in this application, by combining the BIC acquisition board 10 and the FPC circuit board 20, and utilizing the flexible characteristics of the FPC circuit board 20, while reducing the adapter harness and adapter harness plug-in and reducing the material cost, the battery signal sampling of the double-layer battery pack can be realized. Therefore, in this application, when realizing the battery signal acquisition of multiple battery packs through the BIC acquisition board 10 and the FPC circuit board 20, the flexible characteristics of the FPC circuit board can be utilized to optimize or reduce the space required for the layout of the battery signal acquisition device 100, and the assembly process is simple.

[0069] The second aspect of the utility model provides an energy storage system 1000, referring to Figure 7 As shown, the energy storage system 1000 includes a battery management system 200 , a battery 300 and the above-mentioned battery signal acquisition device 100 .

[0070] The battery signal acquisition device 100 is connected to the battery pack 30 and the battery management system 200 .

[0071] According to the energy storage system 1000 of the utility model, the battery signal acquisition device 100 of the above embodiment can realize the acquisition of battery signals of multiple battery packs 30, and the battery signal acquisition device 100 has lower cost and higher assembly efficiency, and the FPC circuit board 20 is not easy to wear.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery signal acquisition device, characterized in that: For a battery, the battery includes a plurality of battery packs, and the battery signal acquisition device includes: A BIC acquisition board, the BIC acquisition board is electrically connected to a battery management system and one of the battery packs in the battery, so as to acquire a battery signal of one of the battery packs and send the battery signal of one of the battery packs to the battery management system; At least one FPC circuit board, each FPC circuit board is connected one-to-one with other battery packs in the battery except one of the battery packs, and each FPC circuit board is electrically connected to the BIC acquisition board to collect battery signals of the other battery packs, and the battery signals of the other battery packs are forwarded by the BIC acquisition board.

2. The battery signal acquisition device according to claim 1, characterized in that: The battery pack includes a plurality of bus bars, and the BIC acquisition board includes: A signal acquisition board, wherein the signal acquisition board is used to transmit battery signals; A plurality of first nickel sheets are provided on the signal collection plate, and each first nickel sheet is provided in one-to-one correspondence with each bus bar, so as to collect a voltage signal of one of the battery packs.

3. The battery signal acquisition device according to claim 2, characterized in that: The BIC acquisition board also includes: At least one first temperature sensor is disposed on the signal acquisition board to acquire a temperature signal of one of the battery packs.

4. The battery signal acquisition device according to claim 2, characterized in that: The BIC acquisition board also includes: At least one first connector is arranged on the signal acquisition board, and each first connector is used for correspondingly electrically connecting to the FPC circuit board.

5. The battery signal acquisition device according to claim 2, characterized in that: The BIC acquisition board also includes: A second connector, wherein the second connector is disposed on the signal acquisition board, and the second connector is used to electrically connect to the battery management system via a cascade line.

6. The battery signal acquisition device according to claim 1, characterized in that: The battery pack includes a plurality of bus bars, and each FPC circuit board includes: A circuit board body, the circuit board body is used to transmit the battery signals of the other battery packs; A plurality of second nickel sheets are arranged on the circuit board body, and each second nickel sheet is arranged in one-to-one correspondence with each bus bar, so as to collect voltage signals of the other battery packs.

7. The battery signal acquisition device according to claim 6, characterized in that: Each FPC circuit board also includes: At least one second temperature sensor is disposed on the circuit board body to collect temperature signals of the other battery packs.

8. The battery signal acquisition device according to claim 3 or 7, characterized in that: The temperature sensor is an NTC temperature sensor.

9. The battery signal acquisition device according to any one of claims 1 to 7, characterized in that: The battery comprises a first battery group and a second battery group, wherein the first battery group and the second battery group are stacked; The BIC acquisition board is laid on the top of the first battery pack, and the BIC acquisition board is electrically connected to the first battery pack to collect the battery signal of the first battery pack and send the battery signal of the first battery pack to the battery management system; The FPC circuit board is laid between the first battery pack and the second battery pack, and the FPC circuit board is electrically connected to the second battery pack to collect the battery signal of the second battery pack, and the battery signal of the second battery pack is forwarded by the BIC acquisition board.

10. An energy storage system, characterized in that: include: Battery management system; A battery, the battery comprising a plurality of battery packs; The battery signal acquisition device according to any one of claims 1 to 9, wherein the battery signal acquisition device is connected to the battery pack and the battery management system.

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