Battery module information acquisition and connection system and power utilization device

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery module information acquisition connection system and an electric device, the battery module information acquisition connection system comprises an insulation support, flexible circuit boards, a battery control piece, a first conductive part, an acquisition piece and a battery module, the insulation support is arranged on the battery module, the flexible circuit boards comprise a first flexible circuit board and a second flexible circuit board, the first flexible circuit board is arranged on the side, away from the battery module, of the insulation support, the second flexible circuit board is arranged on the side, facing the battery module, of the insulation support, the flexible circuit board is connected with the battery control part, the battery cell is connected with the flexible circuit board through the collection part, and the battery control part is connected with the battery module. The first conductive part is arranged on the side, away from the second flexible circuit board, of the insulating support and corresponds to the second flexible circuit board in position, one end of the first conductive part is connected with the battery control piece, and the other end of the first conductive part is connected with a high-voltage interface which is in communication connection with the battery control piece. According to the utility model, damage caused by contact between the low-voltage transmission device and the high-voltage transmission device can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery module information acquisition and connection system and an electric device comprising the battery module information acquisition and connection system. Background Art

[0002] With the rapid development and iteration of new energy vehicles, users are demanding higher vehicle range and improved economy. Conventional solutions currently focus on increasing battery pack capacity or improving charging times. While highly integrated system grouping designs are achieved through approaches like CTP (Cell to Pack) and CTC (Cell to Chassis), structural grouping technology has reached a bottleneck. For large-capacity battery modules, absolute isolation between high- and low-voltage circuits is difficult to achieve. High-voltage output can affect low-voltage circuits, such as the accuracy of battery module information collected by the wiring harness. Utility Model Content

[0003] The purpose of the embodiments of the present utility model is to provide a battery module information collection and connection system and an electrical device, which can physically isolate high and low voltage transmission devices and improve the accuracy of battery module information collection.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] On the one hand, a battery module information collection and connection system is provided, comprising an insulating bracket, a flexible circuit board, a battery control component, a first conductive part, a collection component, and a battery module consisting of multiple battery cells, wherein the insulating bracket is arranged on the battery module, the flexible circuit board includes several first flexible circuit boards and several second flexible circuit boards, the first flexible circuit board is arranged on the side of the insulating bracket away from the battery module, and the second flexible circuit board is arranged on the side of the insulating bracket facing the battery module, the first flexible circuit board and the second flexible circuit board are connected to the battery control component, the battery cell is connected to the first flexible circuit board or the second flexible circuit board through the collection component, and the battery control component is connected to the battery module, the first conductive part is arranged on the side of the insulating bracket away from the second flexible circuit board and corresponds to the position of the second flexible circuit board, the first conductive part is spaced apart from the first flexible circuit board, one end of the first conductive part is connected to the battery control component, and the other end is connected to a high-voltage interface, and the high-voltage interface is communicatively connected to the battery control component.

[0006] As a further solution of the battery module information collection and connection system, the length of the insulating bracket extends along the X direction, the width of the insulating bracket extends along the Y direction perpendicular to the X direction, the insulating bracket has a first end and a second end along the X direction, the battery control component is adjacent to the first end, the high-voltage interface is adjacent to the second end, and the lengths of the first flexible circuit board, the second flexible circuit board, and the first conductive portion extend along the X direction.

[0007] As a further solution of the battery module information collection and connection system, the battery control unit includes several BICs, BMCs and BDUs located on the side of the insulating bracket away from the battery module. Each of the first flexible circuit board and each of the second flexible circuit board is respectively connected to one of the BICs, and the BDU is connected to a fast charging plug interface. The BDU is connected to the high-voltage interface through the first conductive part, and all of the BICs, BDUs and high-voltage interfaces are respectively communicated with the BMC.

[0008] As a further solution of the battery module information collection and connection system, the first flexible circuit board is welded to the corresponding BIC, and the second flexible circuit board passes through the insulating bracket and is welded to the corresponding BIC.

[0009] As a further solution of the battery module information collection and connection system, the BIC has a first collection port and a second collection port, the first collection port and the second collection port are located at two ends of the BIC along the X direction, and the first collection port is adjacent to the first end of the insulating bracket;

[0010] The first flexible circuit board includes a first sub-flexible circuit board and a second sub-flexible circuit board, the first sub-flexible circuit board is located on a side of the second sub-flexible circuit board facing the insulating bracket, the first sub-flexible circuit board is welded to the first collection port of the corresponding BIC, and the second sub-flexible circuit board is welded to the second collection port of the corresponding BIC;

[0011] The second flexible circuit board includes a third sub-flexible circuit board and a fourth sub-flexible circuit board, the third sub-flexible circuit board is located on a side of the fourth sub-flexible circuit board facing away from the insulating bracket, the third sub-flexible circuit board passes through the insulating bracket and is welded to the first collection port of the corresponding BIC, and the fourth sub-flexible circuit board passes through the insulating bracket and is welded to the second collection port of the corresponding BIC.

[0012] As a further solution of the battery module information collection and connection system, one end of the first sub-flexible circuit board along the X direction is overlapped with the second sub-flexible circuit board, and the other end extends to the first end and is flipped to form a first connection end, and the first connection end is welded to the first collection port of the corresponding BIC; one end of the second sub-flexible circuit board along the X direction extends to the second end, and the other end extends to overlap with the first sub-flexible circuit board and is bent to form a second connection end, and the second connection end is welded to the second collection port of the corresponding BIC;

[0013] One end of the third sub-flexible circuit board along the X-direction is overlapped with the fourth sub-flexible circuit board, and the other end extends to the first end and is flipped over to form a third connection end. The third connection end is located on a side of the insulating bracket facing away from the battery module and is welded to the first collection port of the corresponding BIC. One end of the fourth sub-flexible circuit board along the X-direction extends to the second end, and the other end extends to overlap with the third sub-flexible circuit board and is bent through the insulating bracket to form a fourth connection end. The fourth connection end is located on a side of the insulating bracket facing away from the battery module and is welded to the second collection port of the corresponding BIC. The insulating bracket is provided with an escape opening for the fourth sub-flexible circuit board to pass through.

[0014] As a further solution of the battery module information collection and connection system, the collection component includes multiple temperature sensors and multiple second conductive parts. The temperature sensors are adhered to the surface of the battery cell and connected to the flexible circuit board, and the second conductive parts are respectively connected to the flexible circuit board and the battery cell.

[0015] As a further solution of the battery module information collection and connection system, the collection component also includes a PCB, and each flexible circuit board is provided with multiple PCBs spaced apart on both sides along the Y direction. The PCB is connected to the flexible circuit board, and the temperature sensor is welded to the PCB.

[0016] As a further solution of the battery module information collection and connection system, the second conductive part includes a conductive bar and a conductive sheet, all the battery cells are connected in series through the conductive bar, and the conductive sheet is respectively welded to the conductive bar and the flexible circuit board.

[0017] As a further solution of the battery module information collection and connection system, it also includes a third conductive part and a fourth conductive part, the third conductive part is located on a side of the insulating bracket away from the battery module, and the third conductive part is arranged side by side with the first conductive part and spaced apart;

[0018] The conductive bar includes a first aluminum bar, a second aluminum bar, and a plurality of third aluminum bars. All the battery cells are connected in series through the third aluminum bar. The first aluminum bar is connected to the positive electrode of one of the battery cells adjacent to the second end, and the second aluminum bar is connected to the negative electrode of another battery cell adjacent to the first end. The first aluminum bar, the second aluminum bar, and each of the third aluminum bars are respectively connected to the flexible circuit board through one of the conductive sheets.

[0019] The battery control component is connected to the first aluminum bar through the third conductive part, and the battery control component is connected to the second aluminum bar through the fourth conductive part.

[0020] As a further solution of the battery module information collection and connection system, it also includes a low-voltage interface, which is located at the second end and adjacent to the high-voltage interface, and the low-voltage interface is communicatively connected to the battery control component.

[0021] On the other hand, an electrical device is provided, comprising a mounting base and the battery module information acquisition and connection system, wherein the battery module of the battery module information acquisition and connection system is mounted on the mounting base.

[0022] Beneficial effects:

[0023] In the present invention, the first conductive part serves as a high-voltage transmission device, and the flexible circuit board serves as a low-voltage transmission device. In this embodiment, the first conductive part and the corresponding second flexible circuit board are respectively arranged on both sides of the insulating bracket, and the first flexible circuit board located on the same side of the insulating bracket as the first conductive part is spaced apart from the first conductive part to achieve physical isolation of the high-voltage transmission device and the low-voltage transmission device, ensure high-voltage insulation, and improve the information collection accuracy of the battery module.

[0024] The flexible circuit board, BIC, BMC, and BDU in this utility model are all mounted on an insulating bracket. The flexible circuit board is connected to the BIC via a data acquisition component. Each flexible circuit board collects voltage and temperature information from the cells in a corresponding area, thereby transmitting the voltage and temperature information of the entire battery module to the BIC, which then transmits it to the BMC. The BMC uses this information to determine whether the battery module is abnormal. The BDU controls the charging and discharging of the entire battery module based on this information fed back by the BMC and information from the fast charging interface when connected to the external charging terminal. This utility model's battery module information acquisition and connection system is highly integrated, compact, and has a large battery capacity.

[0025] The utility model provides a conductive sheet, and welds the conductive sheet to the flexible circuit board and the conductive bar, i.e., the aluminum bar, respectively. The electrical connection is achieved by welding and fixing, which can greatly reduce the use of connectors or wiring harnesses, etc., and reduce weight and processes.

[0026] The utility model is aimed at large-capacity battery modules. The flexible circuit board is divided into an upper and lower overlapping structure, and the BIC is designed as a dual acquisition port. The dual acquisition ports of each BIC are respectively welded to the connection ends of the upper and lower layers of the flexible circuit board. This can not only improve the acquisition accuracy of battery module information, but also reduce the use of wiring harnesses and connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a structural diagram of the battery module information acquisition and connection system described in an embodiment of the present utility model.

[0029] Figure 2 This is a schematic diagram of an exploded view of the battery module information collection and connection system according to an embodiment of the present utility model.

[0030] Figure 3 for Figure 2 A partial enlarged view of part A.

[0031] Figure 4 for Figure 2 A partial enlarged view of part B.

[0032] Figure 5 This is a schematic diagram of the assembly of the insulating bracket, BIC, flexible circuit board, conductive bar and temperature sensor according to an embodiment of the present utility model.

[0033] Figure 6 for Figure 5 A partial enlarged view of part C.

[0034] Figure 7 This is a partial exploded schematic diagram of the flexible circuit board, BIC and insulating bracket described in an embodiment of the present utility model.

[0035] Figure 8 This is an exploded schematic diagram of the first flexible circuit board and the corresponding BIC according to an embodiment of the present invention.

[0036] Figure 9 This is an exploded schematic diagram of the second flexible circuit board, the corresponding BIC and the insulating bracket according to an embodiment of the present utility model.

[0037] Figure 10 Schematic diagram of the structure of the BIC described in an embodiment of the present utility model.

[0038] In the picture:

[0039] 100, insulating bracket; 110, supporting base; 120, positioning post; 200, flexible circuit board; 201, flexible circuit board body; 202, connecting portion; 203, hollow portion; 210, first flexible circuit board; 211, first sub-flexible circuit board; 212, second sub-flexible circuit board; 213, first connecting terminal; 214, second connecting terminal; 220, second flexible circuit board; 221, third sub-flexible circuit board; 222, fourth sub-flexible circuit board; 223, third connecting terminal; 224, fourth connecting terminal; 300, battery control unit; 310, BIC; 311, first data acquisition port; 312, second data acquisition port; 313, positioning hole; 320, BMC; 330, BDU; 400, first conductive part; 410, first copper busbar; 420, second copper busbar; 500, collection part; 510, temperature sensor; 520, PCB; 530, conductive busbar; 531, first aluminum busbar; 5311, first connecting part; 5312, second connecting part; 532, second aluminum busbar; 5321, third connecting part; 5322, fourth connecting part; 533, third aluminum busbar; 540, conductive sheet; 600, battery module; 710, high-voltage interface; 720, fast charging interface; 730, low-voltage interface; 800, third conductive part; 900, fourth conductive part. DETAILED DESCRIPTION

[0040] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0041] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and the like are used solely for descriptive purposes and do not have any special meaning.

[0044] like Figures 1 to 10 As shown, the battery module information acquisition and connection system of this embodiment includes an insulating bracket 100, a flexible circuit board 200, a battery control component 300, a first conductive part 400, a collection component 500 and a battery module 600 composed of multiple battery cells.

[0045] In which, the insulating bracket 100 is arranged on the battery module 600, and the flexible circuit board 200 includes a plurality of first flexible circuit boards 210 and a plurality of second flexible circuit boards 220. The first flexible circuit boards 210 are arranged on the side of the insulating bracket 100 away from the battery module 600, and the second flexible circuit boards 220 are arranged on the side of the insulating bracket 100 facing the battery module 600. The first flexible circuit boards 210 and the second flexible circuit boards 220 are connected to the battery control unit 300. The battery cells are connected to the first flexible circuit boards 210 or the second flexible circuit boards 220 through the collecting component 500, and the battery control unit 300 is connected to the battery module 600. The first conductive portion 400 is arranged on the side of the insulating bracket 100 away from the second flexible circuit boards 220 and corresponds to the position of the second flexible circuit boards 220. The first conductive portion 400 is spaced apart from the first flexible circuit boards 210. One end of the first conductive portion 400 is connected to the battery control unit 300, and the other end is connected to the high-voltage interface 710. The high-voltage interface 710 is communicatively connected to the battery control unit 300.

[0046] It can be understood that the first conductive part 400 for connecting the high-voltage interface 710 is a high-voltage transmission device, while the flexible circuit board 200 is a low-voltage transmission device. In this embodiment, the second flexible circuit board 220 is arranged on the back side of the insulating bracket 100 (the side of the insulating bracket 100 facing the battery module 600) and the first flexible circuit board 210 is arranged on the front side of the insulating bracket 100 (the side of the insulating bracket 100 facing away from the battery module 600). The insulating bracket 100 is used to physically isolate the corresponding second flexible circuit board 220 as a low-voltage transmission device from the first conductive part 400 as a high-voltage transmission device to ensure high-voltage insulation and prevent the high-voltage transmission device from contacting the low-voltage transmission device and damaging the low-voltage transmission device.

[0047] Optionally, the insulating bracket 100 is composed of multiple sub-insulating brackets. In other embodiments, the insulating bracket 100 can also be integrally injection molded. The battery module 600 is composed of multiple battery modules, each of which includes multiple cells arranged in an array, and the cells are square in structure.

[0048] Furthermore, the length of the insulating bracket 100 extends along the X direction, the width of the insulating bracket 100 extends along the Y direction perpendicular to the X direction, the insulating bracket 100 has a first end and a second end along the X direction, the battery control component 300 is adjacent to the first end, the high-voltage interface 710 is adjacent to the second end, and the lengths of the first flexible circuit board 210, the second flexible circuit board 220, and the first conductive portion 400 extend along the X direction.

[0049] In this embodiment, the battery control unit 300 and the high-voltage interface 710 are respectively disposed adjacent to the ends of the insulating support 100 along the X direction. Compared with disposing them at the ends of the insulating support 100 along the Y direction, the length of each flexible circuit board 200 is extended, and the number of flexible circuit boards 200 is reduced. In addition, the first conductive portion 400, which also extends in the X direction, is spaced apart from the flexible circuit boards 200, making the overall layout more compact and reasonable.

[0050] In this embodiment, the first conductive portion 400 is a copper busbar, which is suitable for high-voltage transmission.

[0051] Furthermore, the battery control unit 300 includes several BICs 310, BMCs 320, and BDUs 330 located on the side of the insulating bracket 100 facing away from the battery module 600. Each first flexible circuit board 210 and each second flexible circuit board 220 are respectively connected to a BIC 310. The BDU 330 is connected to a fast charging plug interface 720. The BDU 330 is connected to the high-voltage interface 710 through the first conductive part 400. All BICs 310, BDUs 330, and high-voltage interfaces 710 are respectively connected to the BMC 320 for communication.

[0052] In this embodiment, each battery cell is connected to the first flexible printed circuit board 210 or the second flexible printed circuit board 220 via a collection component 500. The first flexible printed circuit board 210 or the second flexible printed circuit board 220 collects temperature and voltage information from the corresponding battery cell and transmits it to the corresponding BIC 310. The BIC 310 then transmits this information to the BMC 320, which then determines whether the battery module 600 is abnormal. The BDU 330 controls the charging and discharging of the entire battery module 600 based on this information fed back by the BMC 320 and information from the connection between the high-voltage interface 710 and the external charging port. This embodiment's battery module information collection and connection system features highly integrated functionality, a compact overall structure, and a large battery capacity in the battery module 600.

[0053] Among them, multiple BICs 310 are arranged at intervals along the Y direction, each BIC 310 is connected to a flexible circuit board 200, and communication connection is achieved between two adjacent BICs 310 via a communication line. One of the BICs 310 close to the edge of the insulating bracket 100 along the Y direction is communicated with the BMC 320 via a communication line, so that the information of the battery module 600 collected by all the BICs 310 can be transmitted to the BMC 320.

[0054] Furthermore, the first flexible circuit board 210 is welded to its corresponding BIC 310, and the second flexible circuit board 220 is welded to its corresponding BIC 310 through the insulating bracket 100. The electrical connection between the BIC 310 and the flexible circuit board 200 achieved through welding can significantly reduce the use of connectors or wiring harnesses, reducing weight, process steps, and cost.

[0055] Optionally, in this embodiment, there are four first flexible circuit boards 210 and one second flexible circuit board 220. The four first flexible circuit boards 210 are symmetrical with respect to the first conductive portion 400, and the second flexible circuit board 220 is located directly below the first conductive portion 400 along the Z direction. That is, the second flexible circuit board 220 and the first conductive portion 400 are located on either side of the insulating support 100 along the Z direction. Of course, in other embodiments, the second flexible circuit board 220 can also be disposed at the edge of the insulating support 100 along the Y direction, and correspondingly, the first conductive portion 400 is also disposed at the edge of the insulating support 100 along the Y direction.

[0056] The first conductive portion 400 includes a first copper bar 410 and a second copper bar 420. The first copper bar 410 and the second copper bar 420 are arranged side by side and spaced apart. The lengths of the first copper bar 410 and the second copper bar 420 extend along the X direction, and the ends of the first copper bar 410 and the second copper bar 420 are respectively connected to the high-voltage interface 710 and the BDU 330.

[0057] Furthermore, the BIC 310 has a first collection port 311 and a second collection port 312 . The first collection port 311 and the second collection port 312 are located at two ends of the BIC 310 along the X direction. The first collection port 311 is adjacent to the first end of the insulating bracket 100 .

[0058] The first flexible circuit board 210 includes a first sub-flexible circuit board 211 and a second sub-flexible circuit board 212. The first sub-flexible circuit board 211 is located on the side of the second sub-flexible circuit board 212 facing the insulating bracket 100. The first sub-flexible circuit board 211 is welded to the first collection port 311 of the corresponding BIC 310, and the second sub-flexible circuit board 212 is welded to the second collection port 312 of the corresponding BIC 310.

[0059] The second flexible circuit board 220 includes a third sub-flexible circuit board 221 and a fourth sub-flexible circuit board 222. The third sub-flexible circuit board 221 is located on a side of the fourth sub-flexible circuit board 222 facing away from the insulating support 100. The third sub-flexible circuit board 221 passes through the insulating support 100 and is soldered to the first collection port 311 of the corresponding BIC 310. The fourth sub-flexible circuit board 222 passes through the insulating support 100 and is soldered to the second collection port 312 of the corresponding BIC 310.

[0060] In this embodiment, the first flexible circuit board 210 is designed as a two-layer structure along the Z direction, namely, a first sub-flexible circuit board 211 located at the lower layer and a second sub-flexible circuit board 212 located at the upper layer. The second flexible circuit board 220 is designed as a two-layer structure along the Z direction, namely, a third sub-flexible circuit board 221 located at the lower layer and a fourth sub-flexible circuit board 222 located at the upper layer. The first sub-flexible circuit board 211 is welded to the first acquisition port 311 of the corresponding BIC 310, the second sub-flexible circuit board 212 is welded to the second acquisition port 312 of the corresponding BIC 310, and the third sub-flexible circuit board 221 is welded to the first acquisition port 311 of the corresponding BIC 310, and the fourth sub-flexible circuit board 222 is welded to the second acquisition port 312 of the corresponding BIC 310, so as to realize information collection of the battery module. Compared to existing single-layer flexible circuit board structures and single-port data acquisition, this embodiment utilizes a double-layer flexible circuit board design and dual-port data acquisition in BIC 310. The double-layer flexible circuit board and dual-port data acquisition are welded together, effectively improving the efficiency of battery module data acquisition and enabling the collection of more cell information. Furthermore, the welded connection reduces wiring harness usage and simplifies the connection structure between flexible circuit board 200 and BIC 310. For example, the first sub-flexible circuit board 211 and the second sub-flexible circuit board 212 are connected to each other by adhesive bonding on their opposing sides along the Z direction.

[0061] Alternatively, the term "through" refers to a component extending from one side of another component to the opposite side, and may be passing through the other component or flipped from the edge of the other component to the other side.

[0062] In this embodiment, one end of the first sub-flexible circuit board 211 along the X direction overlaps the second sub-flexible circuit board 212, and the other end extends to the first end and is flipped to form a first connection end 213. The first connection end 213 is welded to the first collection port 311 of the corresponding BIC 310. The second sub-flexible circuit board 212 extends from one end along the X direction to the second end, and the other end extends to overlap the first sub-flexible circuit board 211 and is bent to form a second connection end 214. The second connection end 214 is welded to the second collection port 312 of the corresponding BIC 310.

[0063] One end of the third sub-flexible circuit board 221 along the X-direction overlaps the fourth sub-flexible circuit board 222, and the other end extends to the first end and flips over to form a third connection end 223. The third connection end 223 is located on the side of the insulating support 100 facing away from the battery module 600 and is welded to the first collection port 311 of the corresponding BIC 310. The fourth sub-flexible circuit board 222 extends from one end along the X-direction to the second end, and the other end extends to overlap the third sub-flexible circuit board 221 and bends through the insulating support 100 to form a fourth connection end 224. The fourth connection end 224 is located on the side of the insulating support 100 facing away from the battery module 600 and is welded to the second collection port 312 of the corresponding BIC 310. The insulating support 100 defines an escape opening for the fourth sub-flexible circuit board 222 to pass through.

[0064] In this embodiment, the overlapping lengths of the first and second sub-flexible circuit boards 211 and 212, as well as the overlapping lengths of the third and fourth sub-flexible circuit boards 221 and 222, can be determined based on the actual number of cells in the battery module 600. The main portion of the first sub-flexible circuit board 211 is located below the corresponding BIC 310 (on the side of the BIC 310 facing the insulating support 100). One end of the first sub-flexible circuit board 211 extends below and overlaps the second sub-flexible circuit board 212. The other end extends to the first end of the insulating support 100 and flips upward (toward the BIC 310) to form a first connection end 213 for soldering to the first collection port 311. The main portion of the second sub-flexible circuit board 212 is staggered along the X-direction relative to the corresponding BIC 310. One end of the second sub-flexible circuit board 212 extends to the side of the first sub-flexible circuit board 211 facing away from the insulating support 100 and overlaps the first sub-flexible circuit board 211. After the overlap, the second sub-flexible circuit board 212 flips upward to form a second connection end 214 for soldering to the second collection port 312.

[0065] One end of the third sub-flexible circuit board 221 extends along the X-direction to below the fourth sub-flexible circuit board 222 (on the side of the fourth sub-flexible circuit board 222 facing away from the insulating support 100) and overlaps with the fourth sub-flexible circuit board 222. The other end extends to a position adjacent to the first end of the insulating support 100 and then folds upward to bypass the insulating support 100, forming a third connection end 223 located on the side of the insulating support 100 facing away from the battery module 600. The main body of the fourth sub-flexible circuit board 222 is staggered along the X-direction with respect to the corresponding BIC 310. After overlapping with the third sub-flexible circuit board 221, the main body of the fourth sub-flexible circuit board 222 continues to extend adjacent to the corresponding BIC 310, then bends upward and passes through a clearance hole defined in the insulating support 100, forming a fourth connection end 224 located on the side of the insulating support 100 facing away from the battery module 600.

[0066] In this embodiment, the double-layer structure of the first flexible circuit board 210 and the second flexible circuit board 220 are reasonably arranged and applied to the information collection of the highly integrated and high-capacity battery module 600, so that the overall structure can be made more compact.

[0067] Furthermore, the collecting member 500 includes a plurality of temperature sensors 510 and a plurality of second conductive parts. The temperature sensors 510 are attached to the surface of the battery cell and connected to the flexible circuit board 200 . The second conductive parts are respectively connected to the flexible circuit board 200 and the battery cell.

[0068] Among them, the temperature sensor 510 is pasted on the surface of the battery cell and connected to the flexible circuit board 200, and the temperature information collected by the temperature sensor 510 can be transmitted to the flexible circuit board 200; the second conductive part is connected to the flexible circuit board 200 and the battery cell, and the voltage information of the corresponding battery cell can be collected by the second conductive part and transmitted to the flexible circuit board 200, and the flexible circuit board 200 transmits the collected temperature and voltage information to the corresponding BIC310.

[0069] Furthermore, the collecting component 500 also includes a PCB 520 . A plurality of PCBs 520 are spaced apart on both sides of each flexible circuit board 200 along the Y direction. The PCB 520 is connected to the flexible circuit board 200 , and the temperature sensor 510 is welded to the PCB 520 .

[0070] Alternatively, as Figure 6 As shown, the temperature sensor 510 is attached to the top cover of the battery cell through thermal conductive adhesive and is welded to the PCB 520.

[0071] It can be understood that this embodiment sets PCB520 on both sides of the flexible circuit board 200, adopts a combination of soft and hard methods, and welds the temperature sensor 510 on the PCB520, which can improve the installation stability of the temperature sensor 510, improve the information collection accuracy, and avoid the use of wiring harness connection.

[0072] Furthermore, the second conductive part includes a conductive bar 530 and a conductive sheet 540. All the battery cells are connected in series through the conductive bar 530. The conductive sheet 540 is welded to the conductive bar 530 and the flexible circuit board 200 respectively. Among them, the conductive bar 530 is used to connect the positive and negative poles of adjacent battery cells to realize the series connection of all battery cells in the battery module 600. The conductive sheet 540 is welded to the conductive bar 530 and the flexible circuit board 200 respectively to collect the voltage information of the battery cell. This embodiment uses a conductive sheet 540 and connects the flexible circuit board 200 and the conductive bar 530 by welding, which can avoid the use of a large number of wiring harnesses and make the overall structure simpler.

[0073] Among them, the conductive sheet 540 is a nickel sheet, which has low material cost and good conductivity. The nickel sheet is welded to the conductive bus 530 and the flexible circuit board 200 respectively, which can improve the accuracy and stability of battery module information collection.

[0074] Furthermore, the battery module information collection and connection system of this embodiment further includes a third conductive portion 800 and a fourth conductive portion 900. The third conductive portion 800 is located on a side of the insulating bracket 100 away from the battery module 600. The third conductive portion 800 is arranged side by side with the first conductive portion 400 and spaced apart.

[0075] like Figure 5 and Figure 7 The conductive bar 530 includes a first aluminum bar 531, a second aluminum bar 532, and a plurality of third aluminum bars 533. All the battery cells are connected in series through the third aluminum bar 533. The first aluminum bar 531 is connected to the positive electrode of a battery cell adjacent to the second end, and the second aluminum bar 532 is connected to the negative electrode of another battery cell adjacent to the first end. The first aluminum bar 531, the second aluminum bar 532, and each third aluminum bar 533 are respectively connected to the flexible circuit board 200 through a conductive sheet 540.

[0076] The battery control component 300 is connected to the first aluminum bar 531 via the third conductive part 800 , and the battery control component 300 is connected to the second aluminum bar 532 via the fourth conductive part 900 .

[0077] It is understood that the first aluminum bar 531 is connected to the positive electrode of a battery cell located at the edge of the battery module 600, that is, the first aluminum bar 531 serves as the total positive terminal of the entire battery module 600; the second aluminum bar 532 is connected to the negative electrode of another battery cell located at the edge of the battery module 600, that is, the second aluminum bar 532 serves as the total negative terminal of the entire battery module 600. The first aluminum bar 531 is electrically connected to the battery control unit 300 via the third conductive portion 800, and the second aluminum bar 532 is electrically connected to the battery control unit 300 via the fourth conductive portion 900, so that the battery control unit 300 can control the charging and discharging of the entire battery module 600. The first aluminum bar 531 and the second aluminum bar 532 are respectively located at the edge of the insulating bracket 100, so that the third conductive part 800 and the fourth conductive part 900 extend to the outside of the insulating bracket 100 and then connect to the corresponding first aluminum bar 531 and the second aluminum bar 532, which facilitates the structural design of the third conductive part 800 and the fourth conductive part 900, making the overall layout of the battery module information collection and connection system more compact. Of course, in other embodiments, the first aluminum bar 531 can also be connected to the negative electrode of a battery cell located at the edge of the battery module 600, that is, the first aluminum bar 531 serves as the total negative terminal of the entire battery module 600; the second aluminum bar 532 is connected to the positive electrode of another battery cell located at the edge of the battery module 600, that is, the second aluminum bar 532 serves as the total negative terminal of the entire battery module 600, and the details are not repeated here.

[0078] Specifically, the first conductive portion 400, the third conductive portion 800, and the fourth conductive portion 900 are all copper busbars. The first aluminum busbar 531 is connected to the BDU 330 via the third conductive portion 800, and the second aluminum busbar 532 is connected to the BDU 330 via the fourth conductive portion 900. The third conductive portion 800 is arranged parallel to and spaced from the first conductive portion 400. Because the second aluminum busbar 532 and the BDU 330 are both adjacent to the first end, the fourth conductive portion 900 used to connect the second aluminum busbar 532 and the BDU 330 is relatively short, with most of it located outside the insulating bracket 100. Therefore, the structural layout of this embodiment makes the overall structure of the battery module information collection and connection system more simple, reasonable, and compact.

[0079] For example, the first conductive part 400, the third conductive part 800, and the fourth conductive part 900 are all Z-shaped structures. This structural design can improve the connection stability between the copper busbar and the corresponding components. Figure 3 and Figure 4The first aluminum bar 531 has a first connecting portion 5311 and a second connecting portion 5312 connected to each other. The first connecting portion 5311 is located on the insulating bracket 100 and is welded to the positive electrode of the corresponding battery cell. The insulating bracket 100 is provided with a avoidance opening corresponding to the pole of the battery cell. The second connecting portion 5312 is located on the outside of the insulating bracket 100 and adjacent to the side of the insulating bracket 100 facing the battery module 600. The second connecting portion 5312 is connected to the third conductive portion 800 by a bolt. Correspondingly, the second connecting portion 5312 and the third conductive portion 800 are respectively The second aluminum bar 532 has a third connecting portion 5321 and a fourth connecting portion 5322 connected to each other. The third connecting portion 5321 is located on the insulating bracket 100 and welded to the negative electrode of the corresponding battery cell. The fourth connecting portion 5322 is located outside the insulating bracket 100 and adjacent to the side of the insulating bracket 100 facing the battery module 600. The fourth connecting portion 5322 is connected to the fourth conductive portion 900 via a bolt. Correspondingly, the fourth connecting portion 5322 and the fourth conductive portion 900 each have a connecting hole for the bolt to pass through. The first and second aluminum bars 531 and 532 also have a Z-shaped structure.

[0080] For example, the first aluminum bar 531, the second aluminum bar 532, and the third aluminum bar 533 are each provided with a rivet hole, and the insulating bracket 100 is provided with a corresponding heat rivet stud. The heat rivet stud cooperates with the corresponding rivet hole and is fixed by heat riveting. The flexible circuit board 200 is also fixed to the insulating bracket 100 by heat riveting, and the details are not repeated here. The flexible circuit board 200 includes a flexible circuit board body 201 and a plurality of connecting portions 202. The flexible circuit board body 201 is provided with a plurality of connecting portions 202 corresponding to the conductive bars 530 on both sides thereof along the Y direction. The connecting portions 202 are connected to the flexible circuit board body 201, and a hollow portion 203 is provided between the two. The connecting portions 202 are welded to the conductive sheet 540. In this embodiment, a hollow portion 203 is provided between the connection portion 202 and the flexible circuit board body 201. This allows the connection portion 202 to deform slightly when subjected to vibration and pulling from the conductive sheet 540. The hollow portion 203 prevents this deformation from affecting the flexible circuit board body 201, thus preventing deformation of the flexible circuit board body 201 from affecting the stability of battery module information collection. Specifically, welding holes are provided at the solder joints between the conductive sheet 540 and the connection portion 202. Welding at these holes facilitates welding and improves the stability of the connection between the connection portion 202 and the conductive sheet 540 after welding.

[0081] For example, Figure 4 As shown, a plurality of support seats 110 and positioning posts 120 are provided at intervals on one side of the insulating bracket 100 facing the BIC 310. Figure 10As shown, BIC310 is provided with a positioning hole 313 corresponding to the positioning column 120, and the positioning column 120 is plugged into the positioning hole 313 to support BIC310 through the support base 110 so that there is a gap between BIC310 and the insulating bracket 100 for installing the flexible circuit board 200.

[0082] The battery module information collection and connection system of this embodiment further includes a low voltage interface 730 , which is connected to the BDU 330 via a communication line.

[0083] Specifically, the fast charging plug interface 720 is located on the outside of the insulating bracket 100 and adjacent to the first end of the insulating bracket 100; the high voltage interface 710 and the low voltage interface 730 are located on the outside of the insulating bracket 100 and adjacent to the second end of the insulating bracket 100.

[0084] This embodiment also provides an electrical device comprising a mounting base and the battery module information collection and connection system of the above embodiment, wherein a battery module 600 of the battery module information collection and connection system is mounted on the mounting base. The battery module information collection and connection system has a large number of cells and a large capacity of the battery module 600. Installing this battery module information collection and connection system in a battery-powered device, such as a new energy vehicle, can effectively improve the vehicle's range.

[0085] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery module information collection and connection system, characterized in that: The battery module includes an insulating bracket, a flexible circuit board, a battery control component, a first conductive part, a collecting component, and a battery module consisting of multiple battery cells. The insulating bracket is arranged on the battery module. The flexible circuit board includes several first flexible circuit boards and several second flexible circuit boards. The first flexible circuit board is arranged on the side of the insulating bracket away from the battery module, and the second flexible circuit board is arranged on the side of the insulating bracket facing the battery module. The first flexible circuit board and the second flexible circuit board are connected to the battery control component. The battery cell is connected to the first flexible circuit board or the second flexible circuit board through the collecting component. The battery control component is connected to the battery module. The first conductive part is arranged on the side of the insulating bracket away from the second flexible circuit board and corresponds to the position of the second flexible circuit board. The first conductive part is spaced apart from the first flexible circuit board. One end of the first conductive part is connected to the battery control component, and the other end is connected to a high-voltage interface. The high-voltage interface is communicatively connected to the battery control component.

2. The battery module information acquisition and connection system according to claim 1, characterized in that: The length of the insulating bracket extends along the X direction, and the width of the insulating bracket extends along the Y direction perpendicular to the X direction. The insulating bracket has a first end and a second end along the X direction. The battery control component is adjacent to the first end, and the high-voltage interface is adjacent to the second end. The lengths of the first flexible circuit board, the second flexible circuit board, and the first conductive portion extend along the X direction.

3. The battery module information collection and connection system according to claim 2, characterized in that: The battery control unit includes several BICs, BMCs and BDUs located on the side of the insulating bracket away from the battery module. Each of the first flexible circuit boards and each of the second flexible circuit boards is respectively connected to one of the BICs. The BDU is connected to a fast charging plug interface. The BDU is connected to the high-voltage interface through the first conductive part. All of the BICs, BDUs and high-voltage interfaces are respectively communicated with the BMC.

4. The battery module information acquisition and connection system according to claim 3, characterized in that: The first flexible circuit board is welded to the corresponding BIC, and the second flexible circuit board passes through the insulating bracket and is welded to the corresponding BIC.

5. The battery module information acquisition and connection system according to claim 4, characterized in that: The BIC has a first collection port and a second collection port, the first collection port and the second collection port are located at two ends of the BIC along the X direction, and the first collection port is adjacent to the first end of the insulating bracket; The first flexible circuit board includes a first sub-flexible circuit board and a second sub-flexible circuit board, the first sub-flexible circuit board is located on a side of the second sub-flexible circuit board facing the insulating bracket, the first sub-flexible circuit board is welded to the first collection port of the corresponding BIC, and the second sub-flexible circuit board is welded to the second collection port of the corresponding BIC; The second flexible circuit board includes a third sub-flexible circuit board and a fourth sub-flexible circuit board, the third sub-flexible circuit board is located on a side of the fourth sub-flexible circuit board facing away from the insulating bracket, the third sub-flexible circuit board passes through the insulating bracket and is welded to the first collection port of the corresponding BIC, and the fourth sub-flexible circuit board passes through the insulating bracket and is welded to the second collection port of the corresponding BIC.

6. The battery module information collection and connection system according to claim 5, characterized in that: One end of the first sub-flexible circuit board along the X direction is overlapped with the second sub-flexible circuit board, and the other end extends to the first end and is turned over to form a first connection end, and the first connection end is welded to the first collection port of the corresponding BIC; one end of the second sub-flexible circuit board along the X direction extends to the second end, and the other end extends to overlap with the first sub-flexible circuit board and is bent to form a second connection end, and the second connection end is welded to the second collection port of the corresponding BIC; One end of the third sub-flexible circuit board along the X-direction is overlapped with the fourth sub-flexible circuit board, and the other end extends to the first end and is flipped over to form a third connection end. The third connection end is located on a side of the insulating bracket facing away from the battery module and is welded to the first collection port of the corresponding BIC. One end of the fourth sub-flexible circuit board along the X-direction extends to the second end, and the other end extends to overlap with the third sub-flexible circuit board and is bent through the insulating bracket to form a fourth connection end. The fourth connection end is located on a side of the insulating bracket facing away from the battery module and is welded to the second collection port of the corresponding BIC. The insulating bracket is provided with an escape opening for the fourth sub-flexible circuit board to pass through.

7. The battery module information collection and connection system according to claim 2, characterized in that: The collecting component includes a plurality of temperature sensors and a plurality of second conductive parts. The temperature sensors are attached to the surface of the battery cell and connected to the flexible circuit board. The second conductive parts are respectively connected to the flexible circuit board and the battery cell.

8. The battery module information collection and connection system according to claim 7, characterized in that: The collecting component further includes a PCB, and a plurality of the PCBs are spaced apart on both sides of each flexible circuit board along the Y direction. The PCBs are connected to the flexible circuit boards, and the temperature sensor is welded to the PCBs.

9. The battery module information collection and connection system according to claim 7, characterized in that: The second conductive part includes a conductive bar and a conductive sheet. All the battery cells are connected in series via the conductive bar. The conductive sheet is welded to the conductive bar and the flexible circuit board respectively.

10. The battery module information collection and connection system according to claim 9, characterized in that: It also includes a third conductive portion and a fourth conductive portion, wherein the third conductive portion is located on a side of the insulating bracket away from the battery module, and the third conductive portion is arranged side by side with the first conductive portion and spaced apart; The conductive bar includes a first aluminum bar, a second aluminum bar, and a plurality of third aluminum bars. All the battery cells are connected in series through the third aluminum bar. The first aluminum bar is connected to the positive electrode of one of the battery cells adjacent to the second end, and the second aluminum bar is connected to the negative electrode of another battery cell adjacent to the first end. The first aluminum bar, the second aluminum bar, and each of the third aluminum bars are respectively connected to the flexible circuit board through one of the conductive sheets. The battery control component is connected to the first aluminum bar through the third conductive part, and the battery control component is connected to the second aluminum bar through the fourth conductive part.

11. The battery module information collection and connection system according to any one of claims 2 to 10, characterized in that: It also includes a low-voltage interface, which is located at the second end and adjacent to the high-voltage interface, and is communicatively connected to the battery control component.

12. An electrical device, characterized in that: It comprises a mounting seat and the battery module information acquisition and connection system according to any one of claims 1 to 11, wherein the battery module of the battery module information acquisition and connection system is installed on the mounting seat.

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