EP-4742431-A1 - BATTERY MODULE INFORMATION COLLECTION CONNECTION SYSTEM AND ELECTRIC DEVICE

EP4742431A1EP 4742431 A1EP4742431 A1EP 4742431A1EP-4742431-A1

Abstract

Provided are a battery module information collection and connection system and a powered device. The system includes an insulating bracket (100), flexible circuit boards (200), a battery control member (300), a first conductive portion (400), a collection member (500) and a battery module (600). The insulating bracket (100) is disposed on the battery module (600). The flexible circuit boards (200) include a first flexible circuit board (210) and a second flexible circuit board (220). The first flexible circuit board (210) is disposed on a side of the insulating bracket (100) facing away from the battery module (600), and the second flexible circuit board (220) is disposed on a side of the insulating bracket (100) facing the battery module (600). The flexible circuit board (200) is connected to the battery control member (300), and the cell is connected to a flexible circuit board (200) through the collection member (500). The battery control member (300) is connected to the battery module (600). The first conductive portion (400) is disposed on a side of the insulating bracket (100) facing away from the second flexible circuit board (220) and corresponds to the position of the second flexible circuit board (220). One end of the first conductive portion (400) is connected to the battery control member (300), and the other end of the first conductive portion (400) is connected to a high-voltage interface, and the high-voltage interface is communicatively connected to the battery control member (300).

Inventors

ZHOU, Hongquan
YAN, Huaping
ZHONG, YU

Assignees

Eve Energy Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20250421

Claims (12)

A battery module information collection and connection system, comprising: an insulating bracket, flexible circuit boards, a battery control member, a first conductive portion, a collection member, and a battery module composed of a plurality of cells, wherein the insulating bracket is disposed on the battery module, the flexible circuit boards comprise a plurality of first flexible circuit boards and at least one second flexible circuit board, the plurality of first flexible circuit boards are disposed on a side of the insulating bracket facing away from the battery module, the at least one second flexible circuit board is disposed on a side of the insulating bracket facing the battery module, a first flexible circuit board of the plurality of first flexible circuit boards and a second flexible circuit board of the at least one second flexible circuit board are connected to the battery control member, a cell of the plurality of cells is connected to the first flexible circuit board or the second flexible circuit board through the collection member, the battery control member is connected to the battery module, the first conductive portion is disposed on a side of the insulating bracket facing away from the at least one second flexible circuit board, a position of the first conductive portion corresponds to a position of the at least one second flexible circuit board, the first conductive portion and a first flexible circuit board of the plurality of first flexible circuit boards are disposed at intervals, a first end of the first conductive portion is connected to the battery control member, a second end of the first conductive portion is connected to a high-voltage interface, and the high-voltage interface is communicatively connected to the battery control member.
The battery module information collection and connection system of claim 1, wherein a length of the insulating bracket extends in an X direction, a width of the insulating bracket extends in a Y direction perpendicular to the X direction, the insulating bracket has a first end and a second end in the X direction, the battery control member is adjacent to the first end of the insulating bracket, the high-voltage interface is adjacent to the second end of the insulating bracket, and lengths of the plurality of first flexible circuit boards, a length of the at least one second flexible circuit board, and a length of the first conductive portion extend in the X direction.
The battery module information collection and connection system of claim 2, wherein the battery control member comprises a battery management controller, a battery disconnect unit and a plurality of battery information collectors, which are located on the side of the insulating bracket facing away from the battery module, each first flexible circuit board of the plurality of first flexible circuit boards is connected to one battery information collector of the plurality of battery information collectors, and each second flexible circuit board of the at least one second flexible circuit board is connected to one battery information collector of the plurality of battery information collectors, the battery disconnect unit is connected to a fast-charging plug interface, the battery disconnect unit is connected to the high-voltage interface through the first conductive portion, and the battery disconnect unit, the high-voltage interface, and the plurality of battery information collectors are each communicatively connected to the battery management controller.
The battery module information collection and connection system of claim 3, wherein the first flexible circuit board is welded to a battery information collector corresponding to the first flexible circuit board, and the second flexible circuit board is configured to pass through the insulating bracket and is welded to a battery information collector corresponding to the second flexible circuit board.
The battery module information collection and connection system of claim 4, wherein a battery information collector of the plurality of battery information collectors 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 battery information collector in the X direction, and the first collection port is adjacent to the first end of the insulating bracket; the first flexible circuit board comprises 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 a first collection port of a battery information collector corresponding to the first sub-flexible circuit board, and the second sub-flexible circuit board is welded to a second collection port of a battery information collector corresponding to the second sub-flexible circuit board; and the second flexible circuit board comprises 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 is configured to pass through the insulating bracket and is welded to a first collection port of a battery information collector corresponding to the third sub-flexible circuit board, and the fourth sub-flexible circuit board is configured to pass through the insulating bracket and is welded to a second collection port of a battery information collector corresponding to the fourth sub-flexible circuit board.
The battery module information collection and connection system of claim 5, wherein a first end of the first sub-flexible circuit board in the X direction overlaps with and is in contact with the second sub-flexible circuit board, a second end of the first sub-flexible circuit board in the X direction extends to the first end of the insulating bracket and is turned over to form a first connection end, the first connection end is welded to the first collection port of the battery information collector corresponding to the first sub-flexible circuit board, a first end of the second sub-flexible circuit board in the X direction extends to the second end of the insulating bracket, a second end of the second sub-flexible circuit board in the X direction extends to overlap with and is in contact with the first sub-flexible circuit board and is configured to bent to form a second connection end, and the second connection end is welded to the second collection port of the battery information collector corresponding to the second sub-flexible circuit board; and a first end of the third sub-flexible circuit board in the X direction overlaps with and is in contact with the fourth sub-flexible circuit board, a second end of the third sub-flexible circuit board in the X direction extends to the first end of the insulating bracket and is turned over to form a third connection end, the third connection end is located on the side of the insulating bracket facing away from the battery module and is welded to the first collection port of the battery information collector corresponding to the third sub-flexible circuit board, a first end of the fourth sub-flexible circuit board in the X direction extends to the second end of the insulating bracket, a second end of the fourth sub-flexible circuit board in the X direction extends to overlap with and is in contact with the third sub-flexible circuit board and is configured to bent and pass through the insulating bracket to form a fourth connection end, the fourth connection end is located on the side of the insulating bracket facing away from the battery module and is welded to the second collection port of the battery information collector corresponding to the fourth sub-flexible circuit board, and the insulating bracket is provided with an avoidance port for the fourth sub-flexible circuit board to pass through.
The battery module information collection and connection system of claim 2, wherein the collection member comprises a plurality of temperature sensors and a plurality of second conductive portions, a temperature sensor of the plurality of temperature sensors is affixed to a surface of a respective cell of the plurality of cells and is connected to a respective flexible circuit board of the flexible circuit boards, and a second conductive portion of the plurality of second conductive portions is connected to a respective flexible circuit board of the flexible circuit boards and a respective cell of the plurality of cells.
The battery module information collection and connection system of claim 7, wherein the collection member further comprises printed circuit boards, a plurality of the printed circuit boards are disposed at intervals on each of two sides of each flexible circuit board of the flexible circuit boards in the Y direction, a printed circuit board of the plurality of printed circuit boards is connected to a respective flexible circuit board of the flexible circuit boards, and a temperature sensor of the plurality of temperature sensors is welded to a respective printed circuit board of the plurality of printed circuit boards.
The battery module information collection and connection system of claim 7, wherein a second conductive portion of the plurality of second conductive portions comprises a conductive busbar and conductive sheets, the plurality of cells are connected in series through the conductive busbar, and a conductive sheet of the conductive sheets is welded to the conductive busbar and a respective flexible circuit board of the flexible circuit boards.
The battery module information collection and connection system of claim 8, further comprising a third conductive portion and a fourth conductive portion, wherein the third conductive portion is located on the side of the insulating bracket facing away from the battery module, and the third conductive portion and the first conductive portion are disposed side by side and at intervals; the conductive busbar comprises a first aluminum busbar, a second aluminum busbar and a plurality of third aluminum busbars, the plurality of cells are connected in series through the plurality of third aluminum busbars, the first aluminum busbar is connected to a positive electrode of one cell adjacent to the second end of the insulating bracket, the second aluminum busbar is connected to a negative electrode of another cell adjacent to the first end of the insulating bracket, and the first aluminum busbar, the second aluminum busbar, and each of the plurality of third aluminum busbars are each connected to a respective flexible circuit board of the flexible circuit boards through one conductive sheet of the conductive sheets; and the battery control member is connected to the first aluminum busbar through the third conductive portion, and the battery control member is connected to the second aluminum busbar through the fourth conductive portion.
The battery module information collection and connection system of any one of claims 2 to 10, further comprising a low-voltage interface, wherein the low-voltage interface is located at the second end of the insulating bracket and is adjacent to the high-voltage interface and is communicatively connected to the battery control member.
A powered device, comprising: a mounting base and the battery module information collection and connection system of any one of claims 1 to 11, wherein the battery module of the battery module information collection and connection system is mounted on the mounting base.

Description

The present application claims priority to Chinese Patent Application No. 202411555638.1, filed with the China National Intellectual Property Administration (CNIPA) on Nov. 1, 2024, and claims priority to Chinese Patent Application No. 202422670580.7, filed with the CNIPA on Nov. 1, 2024, the disclosures of which are incorporated herein by reference in their entireties. TECHNICAL FIELD The present application relates to the technical field of power batteries, for example, a battery module information collection and connection system, and a powered device including the battery module information collection and connection system. BACKGROUND With the rapid development of new energy vehicles, users have put forward higher requirements for the cruising range of the whole vehicle, and meanwhile, have put forward requirements for higher economy. At present, conventional solutions are mainly to increase the charge capacity of the battery pack or to improve the charging efficiency of the battery pack. The high integration of the system grouping design is achieved in a manner of a cell to pack (CTP)/cell to chassis (CTC) and the like. Technical problem The related structural grouping technology has reached a certain bottleneck. For large-capacity battery modules, it is difficult to achieve absolute isolation between a high-voltage circuit and a low-voltage circuit. During high-voltage output, the high-voltage circuit may interfere with the low-voltage circuit, such as the accuracy of the battery module information collected by the collection wire harness. SUMMARY Technical solutions On the one hand, the present application provides a battery module information collection and connection system. The battery module information collection and connection system includes an insulating bracket, flexible circuit boards, a battery control member, a first conductive portion, a collection member, and a battery module composed of multiple cells. The insulating bracket is disposed on the battery module. The flexible circuit boards include multiple first flexible circuit boards and at least one second flexible circuit board. A first flexible circuit board of the multiple first flexible circuit boards is disposed on a side of the insulating bracket facing away from the battery module, and the at least one second flexible circuit board is disposed on a side of the insulating bracket facing the battery module. A first flexible circuit board of the multiple first flexible circuit boards and a second flexible circuit board of the at least one second flexible circuit board are connected to the battery control member. A cell of the multiple cells is connected to the first flexible circuit board or the second flexible circuit board through the collection member. The battery control member is connected to the battery module. The first conductive portion is disposed on a side of the insulating bracket facing away from the at least one second flexible circuit board, and a position of the first conductive portion corresponds to a position of the at least one second flexible circuit board. The first conductive portion and a first flexible circuit board of the multiple first flexible circuit boards are disposed at intervals. A first end of the first conductive portion is connected to the battery control member, a second end of the first conductive portion is connected to a high-voltage interface, and the high-voltage interface is communicatively connected to the battery control member. On the other hand, the present application provides a powered device. The powered device includes a mounting base and the battery module information collection and connection system described in any one of the embodiments. The battery module of the battery module information collection and connection system is mounted on the mounting base. Beneficial effects In some embodiments of the present application, the first conductive portion is used as a high-voltage conveying device, the flexible circuit board and the like is used as a low-voltage conveying device, the first conductive portion and the corresponding second flexible circuit board are respectively disposed on two sides of the insulating bracket, and the first flexible circuit board located on the same side of the insulating bracket as the first conductive portion is disposed to be spaced apart from the first conductive portion, thereby achieving physical isolation between the high-voltage conveying device and the low-voltage conveying device, ensuring high-voltage insulation, and improving information collection accuracy of the battery module. In some embodiments of the present application, the flexible circuit board, the battery information collector (BIC), the battery management controller (BMC) and the battery disconnect unit (BDU) are all mounted on the insulating bracket, the flexible circuit board is connected to the BIC through the collection member, and each flexible circuit board correspondingly c