Battery module information acquisition and connection system and power utilization device

Abstract

The invention 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 member, a first conductive part, an acquisition member 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. Damage caused by contact between the low-voltage transmission device and the high-voltage transmission device can be avoided.

Description

Technical Field

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

[0002] With the rapid development and iteration of new energy vehicles, users have higher requirements for vehicle range and higher economy. The current conventional solutions are mainly to increase the battery pack capacity or improve the charging time of the battery pack. The system group design is highly integrated by adopting CTP (Cell to Pack) / CTC (Cell to Chassis). The current structural group technology has reached a certain bottleneck. For large-capacity battery modules, it is difficult to achieve absolute isolation between high and low voltage lines. When high voltage is output, the high voltage line will affect the low voltage line, such as the accuracy of the battery module information collected by the collection harness. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a battery module information collection 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] To achieve the above object, the present invention 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 composed of multiple battery cells, wherein the insulating bracket is arranged on the battery module, the flexible circuit board comprises a plurality of first flexible circuit boards and a plurality of second flexible circuit boards, the first flexible circuit board is arranged on a side of the insulating bracket away from the battery module, the second flexible circuit board is arranged on a side of the insulating bracket toward 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, the battery control component is connected to the battery module, the first conductive part is arranged on a 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 acquisition 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 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 a plurality of 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, 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 BMCs.

[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 acquisition connection system, the BIC has a first acquisition port and a second acquisition port, the first acquisition port and the second acquisition port are located at two ends of the BIC along the X direction, and the first acquisition 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 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 turned over to form a first connection end, and the first connection end is welded to the first collection port of the corresponding BIC, and 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 turned over to form a third connection end, the third connection end is located on the side of the insulating bracket 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 the side of the insulating bracket away from the battery module and is welded to the second collection port of the corresponding BIC, and the insulating bracket is provided with an avoidance 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. 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 a plurality of 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 and spaced apart from the first conductive part;

[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 of the battery cells adjacent to the first end; the first aluminum bar, the second aluminum bar and each of the third aluminum bars are connected to the flexible circuit board through one of the conductive sheets respectively;

[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 acquisition 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 seat 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 seat.

[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, thereby realizing physical isolation of the high-voltage transmission device and the low-voltage transmission device, ensuring high-voltage insulation, and improving the information collection accuracy of the battery module.

[0024] The flexible circuit board, BIC, BMC and BDU of the present invention are all installed on the insulating bracket, and the flexible circuit board is connected to the BIC through the collection component. Each flexible circuit board collects the voltage and temperature information of the battery cells in a region, so that the voltage and temperature information of the entire battery module can be transmitted to the BIC, and transmitted to the BMC through the BIC. The BMC is used to determine whether the battery module is abnormal, and the BDU controls the charging and discharging of the entire battery module according to the information fed back by the BMC and the information when the fast charging interface is plugged in with the external charging terminal. The battery module information collection and connection system of the present invention is highly integrated in function, compact in overall structure, and the battery capacity of the battery module is large.

[0025] The present invention 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 present invention aims at a large-capacity battery module, divides the flexible circuit board into an upper and lower overlapping structure, and designs the BIC 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, which can improve the acquisition accuracy of the battery module information and reduce the use of wiring harnesses and connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0028] Figure 1 It is a structural schematic diagram of the battery module information acquisition and connection system according to an embodiment of the present invention.

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

[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 It is a schematic diagram of assembling the insulating bracket, BIC, flexible circuit board, conductive bar and temperature sensor according to an embodiment of the present invention.

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

[0034] Figure 7 It is a partial exploded schematic diagram of the flexible circuit board, BIC and insulating bracket according to an embodiment of the present invention.

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

[0036] Fig. 9 It is a schematic diagram of the decomposition of the second flexible circuit board, the corresponding BIC and the insulating bracket according to an embodiment of the present invention.

[0037] Fig.10 It is a schematic diagram of the structure of the BIC described in the embodiment of the present invention.

[0038] In the figure:

[0039] 100, insulating bracket; 110, supporting seat; 120, positioning column; 200, flexible circuit board; 201, flexible circuit board body; 202, connecting part; 203, hollow part; 210, first flexible circuit board; 211, first sub-flexible circuit board; 212, second sub-flexible circuit board; 213, first connecting end; 214, second connecting end; 220, second flexible circuit board; 221, third sub-flexible circuit board; 222, fourth sub-flexible circuit board; 223, third connecting end; 224, fourth connecting end; 300, battery control unit; 310, BIC; 311, first collection port; 312, second collection port; 313, positioning hole; 320, BMC; 330, BDU; 400, first conductive part; 410, first copper bar; 420, second copper bar; 500, collection piece; 510, temperature sensor; 520, PCB; 530, conductive bar; 531, first aluminum bar; 5311, first connecting part; 5312, second connecting part; 532, second aluminum bar; 5321, third connecting part; 5322, fourth connecting part; 533, third aluminum bar; 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] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and 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 includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, if the terms "upper", "lower", "left", "right" and other directions or positional relationships appear, they are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", etc. appear, they are only used to distinguish in the description and have no 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] Among them, the insulating bracket 100 is arranged on the battery module 600, 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 board 210 is arranged on the side of the insulating bracket 100 away from the battery module 600, and the second flexible circuit board 220 is arranged on the side of the insulating bracket 100 facing the battery module 600, the first flexible circuit board 210 and the second flexible circuit board 220 are connected to the battery control component 300, the battery cell is connected to the first flexible circuit board 210 or the second flexible circuit board 220 through the collecting component 500, the battery control component 300 is connected to the battery module 600, the first conductive part 400 is arranged on the side of the insulating bracket 100 away from the second flexible circuit board 220 and corresponds to the position of the second flexible circuit board 220, the first conductive part 400 is spaced apart from the first flexible circuit board 210, one end of the first conductive part 400 is connected to the battery control component 300, and the other end is connected to the high-voltage interface 710, and the high-voltage interface 710 is communicatively connected to the battery control component 300.

[0046] It can be understood that the first conductive part 400 used to connect the high-voltage interface 710 belongs to a high-voltage transmission device, and the flexible circuit board 200 belongs to 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 away from the battery module 600). The corresponding second flexible circuit board 220 as a low-voltage transmission device is physically isolated from the first conductive part 400 as a high-voltage transmission device through the insulating bracket 100 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 support 100 is composed of a plurality of sub-insulating supports. In other embodiments, the insulating support 100 may also be integrally injection molded. The battery module 600 is composed of a plurality of battery modules, each of which includes a plurality of cells arranged in an array, and the cells are of a square structure.

[0048] Further, the length of the insulating support 100 extends along the X direction, the width of the insulating support 100 extends along the Y direction perpendicular to the X direction, the insulating support 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 arranged adjacent to the two ends of the insulating bracket 100 along the X direction. Compared with being arranged at the two ends of the insulating bracket 100 along the Y direction, the length of each flexible circuit board 200 is extended, the number of flexible circuit boards 200 is reduced, and the first conductive portion 400, which also extends in the X direction, is spaced apart from the flexible circuit board 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 a plurality of BIC310, BMC320 and BDU330 located on the side of the insulating bracket 100 away from the battery module 600, each first flexible circuit board 210 and each second flexible circuit board 220 are respectively connected to a BIC310, and the BDU330 is connected to the fast charging plug interface 720. The BDU330 is connected to the high-voltage interface 710 through the first conductive part 400, and all BIC310, BDU330 and the high-voltage interface 710 are respectively communicated with the BMC320.

[0052] In this embodiment, each battery cell is connected to the first flexible circuit board 210 or the second flexible circuit board 220 through a collection component 500. The first flexible circuit board 210 and the second flexible circuit board 220 collect the temperature / voltage information of the corresponding battery cell and transmit it to the corresponding BIC310, and transmit it to the BMC320 through the BIC310. The BMC320 is used to determine whether the battery module 600 is abnormal, and the BDU330 controls the charging and discharging of the entire battery module 600 according to the information fed back by the BMC320 and the information when the high-voltage interface 710 is plugged into the external charging terminal. The battery module information collection and connection system of this embodiment is highly integrated in function, compact in overall structure, and the battery capacity of the battery module 600 is large.

[0053] Among them, multiple BIC310 are arranged at intervals along the Y direction, each BIC310 is connected to a flexible circuit board 200, and communication connection is achieved between two adjacent BIC310 through a communication line. One of the BIC310 close to the edge of the insulating bracket 100 along the Y direction is communicated with the BMC320 through the communication line, so that the information of the battery module 600 collected by all BIC310 can be transmitted to BMC320.

[0054] Furthermore, the first flexible circuit board 210 is welded to the corresponding BIC 310, and the second flexible circuit board 220 passes through the insulating bracket 100 and is welded to the corresponding BIC 310. The electrical connection between the BIC 310 and the flexible circuit board 200 is achieved by welding and fixing, which can greatly reduce the use of connectors or wiring harnesses, reduce weight and processes, and save costs.

[0055] Optionally, in this embodiment, the number of the first flexible circuit boards 210 is four, the number of the second flexible circuit boards 220 is one, the four first flexible circuit boards 210 are symmetrical with respect to the first conductive part 400, and the second flexible circuit board 220 is located directly below the first conductive part 400 along the Z direction, that is, the second flexible circuit board 220 and the first conductive part 400 are respectively located on both sides of the insulating support 100 along the Z direction. Of course, in other embodiments, the second flexible circuit board 220 can also be arranged at the edge of the insulating support 100 along the Y direction, and correspondingly, the first conductive part 400 is also arranged at the edge of the insulating support 100 along the Y direction.

[0056] The first conductive part 400 includes a first copper bar 410 and a second copper bar 420, which 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 two ends of the first copper bar 410 and the second copper bar 420 are connected to the high-voltage interface 710 and the BDU330 respectively.

[0057] Further, 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, and 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 away from the insulating support 100. The third sub-flexible circuit board 221 passes through the insulating support 100 and is welded 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 welded to the second collection port 312 of the corresponding BIC 310.

[0060] In this embodiment, the first flexible circuit board 210 is designed to be an upper and lower two-layer structure along the Z direction, that is, the first sub-flexible circuit board 211 located at the lower layer and the second sub-flexible circuit board 212 located at the upper layer, and the second flexible circuit board 220 is designed to be an upper and lower two-layer structure along the Z direction, that is, the third sub-flexible circuit board 221 located at the lower layer and the fourth sub-flexible circuit board 222 located at the upper layer, and the first sub-flexible circuit board 211 is welded to the first collection port 311 of the corresponding BIC 310, the second sub-flexible circuit board 212 is welded to the second collection port 312 of the corresponding BIC 310, and the third sub-flexible circuit board 221 is welded to the first collection port 311 of the corresponding BIC 310, and the fourth sub-flexible circuit board 222 is welded to the second collection port 312 of the corresponding BIC 310, so as to realize information collection of the battery module. Compared with the existing single-layer flexible circuit board structure and single-port collection, this embodiment designs the flexible circuit board as a double-layer structure, and BIC310 adopts dual-port collection. The double-layer flexible circuit board and the dual ports are welded correspondingly, which can effectively improve the efficiency of battery module information collection, can collect more battery cell information, and realize connection through welding, which can save the use of wiring harnesses and simplify the connection structure between the flexible circuit board 200 and BIC310. Exemplarily, the first sub-flexible circuit board 211 and the second sub-flexible circuit board 212 are connected to each other by pasting on the two opposite sides along the Z direction.

[0061] Optionally, the term “through” means that one component extends from one side of another component to the other opposite side, and may pass through the other component or be turned over 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 is overlapped with the second sub-flexible circuit board 212, and the other end extends to the first end and is turned over to form a first connection end 213, and the first connection end 213 is welded to the first collection port 311 of the corresponding BIC310, and one end of the second sub-flexible circuit board 212 along the X direction extends to the second end, and the other end extends to overlap with the first sub-flexible circuit board 211 and is bent to form a second connection end 214, and the second connection end 214 is welded to the second collection port 312 of the corresponding BIC310;

[0063] One end of the third sub-flexible circuit board 221 along the X direction is overlapped with the fourth sub-flexible circuit board 222, and the other end extends to the first end and is turned over to form a third connection end 223. The third connection end 223 is located on the side of the insulating bracket 100 away from the battery module 600 and is welded to the first collection port 311 of the corresponding BIC310. One end of the fourth sub-flexible circuit board 222 along the X direction extends to the second end, and the other end extends to overlap with the third sub-flexible circuit board 221 and bends through the insulating bracket 100 to form a fourth connection end 224. The fourth connection end 224 is located on the side of the insulating bracket 100 away from the battery module 600 and is welded to the second collection port 312 of the corresponding BIC310. The insulating bracket 100 is provided with an avoidance opening for the fourth sub-flexible circuit board 222 to pass through.

[0064] In this embodiment, the overlapping length of the first sub-flexible circuit board 211 and the second sub-flexible circuit board 212 and the overlapping length of the third sub-flexible circuit board 221 and the fourth sub-flexible circuit board 222 can be determined according to the actual number of cells in the battery module 600. The main body of the first sub-flexible circuit board 211 is located below the corresponding BIC 310 (the side of the BIC 310 facing the insulating bracket 100), one end of which extends to the bottom of the second sub-flexible circuit board 212 and overlaps with the second sub-flexible circuit board 212, and the other end extends to the first end of the insulating bracket 100 and turns upward (towards the BIC 310) to form a first connection end 213 for welding with the first collection port 311; the main body of the second sub-flexible circuit board 212 is staggered with the corresponding BIC 310 along the X direction, one end of which extends to the side of the first sub-flexible circuit board 211 away from the insulating bracket 100 and overlaps with the first sub-flexible circuit board 211, and the overlapped second sub-flexible circuit board 212 turns upward to form a second connection end 214 for welding with the second collection port 312.

[0065] One end of the third sub-flexible circuit board 221 extends along the X direction to the bottom of the fourth sub-flexible circuit board 222 (the side of the fourth sub-flexible circuit board 222 away from the insulating bracket 100) and overlaps with the fourth sub-flexible circuit board 222, and the other end extends to the first end close to the insulating bracket 100 and turns upward to bypass the insulating bracket 100, forming a third connection end 223 located on the side of the insulating bracket 100 away from the battery module 600; the main body of the fourth sub-flexible circuit board 222 is staggered with the corresponding BIC310 along the X direction. After the main body of the fourth sub-flexible circuit board 222 overlaps with the third sub-flexible circuit board 221, it continues to extend to the adjacent corresponding BIC310, and then bends upward and passes through the avoidance hole opened on the insulating bracket 100, forming a fourth connection end 224 located on the side of the insulating bracket 100 away from the battery module 600.

[0066] In this embodiment, the first flexible circuit board 210 and the second flexible circuit board 220 with a double-layer structure are reasonably laid out and applied to information collection of a 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 , and 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, so that the temperature information collected by the temperature sensor 510 can be transmitted to the flexible circuit board 200; the second conductive part connects the flexible circuit board 200 and the battery cell, and the second conductive part can be used to collect the voltage information of the corresponding battery cell and transmit it 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 member 500 also includes a PCB520, and a plurality of PCB520 are spaced apart on both sides of each flexible circuit board 200 along the Y direction. The PCB520 is connected to the flexible circuit board 200, and the temperature sensor 510 is welded to the PCB520.

[0070] Alternatively, if Figure 6 As shown, the temperature sensor 510 is attached to the top cover of the battery cell by means of 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, 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, and 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 adopts the 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 more concise.

[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 bar 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 part 800 and a fourth conductive part 900, the third conductive part 800 is located on a side of the insulating bracket 100 away from the battery module 600, and the third conductive part 800 and the first conductive part 400 are arranged side by side 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 cells are connected in series through the third aluminum bar 533. The first aluminum bar 531 is connected to the positive electrode of a cell adjacent to the second end, and the second aluminum bar 532 is connected to the negative electrode of another cell adjacent to the first end. The first aluminum bar 531, the second aluminum bar 532 and each third aluminum bar 533 are connected to the flexible circuit board 200 through a conductive sheet 540 respectively.

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

[0077] It can be 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 through the third conductive part 800, and the second aluminum bar 532 is electrically connected to the battery control unit 300 through the fourth conductive part 900, so that the charging and discharging of the entire battery module 600 can be controlled by the battery control unit 300. The first aluminum row 531 and the second aluminum row 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 with the corresponding first aluminum row 531 and the second aluminum row 532, which is convenient for the structural design of the third conductive part 800 and the fourth conductive part 900, and makes the overall layout of the battery module information collection and connection system more compact. Of course, in other embodiments, the first aluminum row 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 row 531 serves as the total negative terminal of the entire battery module 600; the second aluminum row 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 row 532 serves as the total negative terminal of the entire battery module 600, and the details are not repeated.

[0078] Specifically, the first conductive part 400, the third conductive part 800 and the fourth conductive part 900 are all copper bars. The first aluminum bar 531 is connected to the BDU330 through the third conductive part 800, and the second aluminum bar 532 is connected to the BDU330 through the fourth conductive part 900. The third conductive part 800 is arranged parallel to the first conductive part 400 and spaced apart. Since the second aluminum bar 532 and the BDU330 are both adjacent to the first end, the length of the fourth conductive part 900 used to connect the second aluminum bar 532 and the BDU330 is short, and most of it is located outside the insulating bracket 100. Therefore, the structural layout of this embodiment makes the overall structure of the battery module information acquisition connection system more concise, reasonable and compact.

[0079] Exemplarily, the first conductive part 400, the third conductive part 800, and the fourth conductive part 900 are all Z-shaped structures, and the use of 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 support 100 and is welded to the positive electrode of the corresponding battery cell. The insulating support 100 is provided with a avoidance opening corresponding to the pole of the battery cell. The second connecting portion 5312 is located on the outer side of the insulating support 100 and adjacent to the side of the insulating support 100 facing the battery module 600. The second connecting portion 5312 is connected to the third conductive portion 800 by bolts. Correspondingly, the second connecting portion 5312 and the third conductive portion 800 are respectively A connection hole for bolts to pass through is provided; the second aluminum bar 532 has a third connection part 5321 and a fourth connection part 5322 connected to each other, the third connection part 5321 is located on the insulating bracket 100 and is welded to the negative electrode of the corresponding battery cell, and the fourth connection part 5322 is located on the outer side of the insulating bracket 100 and adjacent to the insulating bracket 100 facing the side of the battery module 600. The fourth connection part 5322 is connected to the fourth conductive part 900 by bolts. Correspondingly, the fourth connection part 5322 and the fourth conductive part 900 are respectively provided with connection holes for bolts to pass through. The first aluminum bar 531 and the second aluminum bar 532 are also both Z-shaped structures.

[0080] Exemplarily, the first aluminum row 531, the second aluminum row 532, and the third aluminum row 533 are respectively provided with rivet holes, and the insulating bracket 100 is provided with corresponding hot riveting posts, which cooperate with the corresponding riveting holes and are fixed by hot riveting. The flexible circuit board 200 is also fixed by hot riveting with the hot riveting posts on the insulating bracket 100, and the details are not repeated. The flexible circuit board 200 includes a flexible circuit board body 201 and a plurality of connecting parts 202. The flexible circuit board body 201 is provided with a plurality of connecting parts 202 corresponding to the conductive row 530 at intervals on both sides along the Y direction. The connecting parts 202 are connected to the flexible circuit board body 201, and a hollow part 203 is provided between the two, and the connecting parts 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. When the connection portion 202 is vibrated or pulled by the conductive sheet 540, slight deformation will occur. The hollow portion 203 can prevent the deformation from affecting the flexible circuit board body 201, and prevent the deformation of the flexible circuit board body 201 from affecting the stability of battery module information collection. Specifically, welding holes are provided at the welding points of the conductive sheet 540 and the connection portion 202. Welding at the welding holes can improve welding convenience, and at the same time, the connection stability between the connection portion 202 and the conductive sheet 540 can be improved 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. Fig.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, and the BIC310 is supported by the support base 110 so that there is a gap between the 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 , and the low voltage interface 730 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 electric device, including a mounting seat and the battery module information collection and connection system of the above embodiment, wherein the battery module 600 of the battery module information collection and connection system is mounted on the mounting seat. Among them, the battery module information collection and connection system has a large number of cells and a large capacity of the battery module 600. After the battery electric device such as a new energy vehicle is installed with the battery module information collection and connection system, the cruising range of the new energy vehicle can be effectively improved.

[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 is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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: It includes an insulating bracket, a flexible circuit board, a battery control component, a first conductive part, a collecting component and a battery module composed of multiple battery cells, the insulating bracket is arranged on the battery module, the flexible circuit board includes a plurality of first flexible circuit boards and a plurality of second flexible circuit boards, the first flexible circuit board is arranged on the side of the insulating bracket away from the battery module, 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, and the high-voltage interface is communicatively connected to the battery control component.

2. The battery module information collection and connection system according to claim 1, characterized in that: The length of the insulating support extends along the X direction, the width of the insulating support extends along the Y direction perpendicular to the X direction, the insulating support 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 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 a plurality of 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 are 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 portion. All of the BICs, BDUs and high-voltage interfaces are respectively communicatively connected to the BMCs.

4. The battery module information collection 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 collection 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 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 turned over to form a third connection end, the third connection end is located on the side of the insulating bracket 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 the side of the insulating bracket away from the battery module and is welded to the second collection port of the corresponding BIC, and the insulating bracket is provided with an avoidance 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 member 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 connected to the PCBs by welding.

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, and the conductive sheet is respectively welded to the conductive bar and the flexible circuit board.

10. The battery module information collection and connection system according to claim 8, characterized in that: It also includes a third conductive part and a fourth conductive part, wherein 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 and spaced apart from the first conductive part; 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 of the battery cells adjacent to the first end; the first aluminum bar, the second aluminum bar and each of the third aluminum bars are connected to the flexible circuit board through one of the conductive sheets respectively; 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 acquisition 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 the low-voltage interface is communicatively connected with 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 mounted on the mounting seat.

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