Data acquisition device of battery module

Abstract

The utility model relates to a data acquisition device of a battery module, which comprises a flexible circuit board, a plurality of busbars and a plurality of signal acquisition pieces, the flexible circuit board comprises an upper surface and a lower surface which are arranged back to back, and a plurality of connecting ports are arranged in the length direction of the flexible circuit board. The connector penetrates through the flexible circuit board along the height direction, the busbar is arranged on the upper surface and covers the connector, and the signal acquisition piece is arranged on the lower surface and is connected with the busbar through the connector. According to the utility model, the busbar and the signal acquisition member are integrated on the flexible circuit board, so that more signal acquisition points can be provided, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery acquisition devices, in particular to a data acquisition device for a battery module. Background Art

[0002] Existing integrated busbars primarily consist of signal acquisition components, plastic structural components, and busbars. The busbars are typically mounted on the long sides of the plastic structural components, while the signal acquisition components are deployed between the busbars on the plastic structural components. Because the area on the plastic structural components for mounting signal acquisition components is too narrow, the signal acquisition components cannot accommodate more acquisition wiring harnesses, significantly reducing the number of signal acquisition points.

[0003] Plastic components are typically molded in a single pass using a specific mold. This design approach means each integrated busbar can only be used with the same battery module model. To adapt to a different battery module model, the plastic components must be re-molded, significantly increasing production costs. Utility Model Content

[0004] The purpose of the utility model is to provide a data acquisition device for a battery module, which integrates a busbar and a signal acquisition component into a flexible circuit board, thereby providing more signal acquisition points and reducing production costs.

[0005] A data acquisition device for a battery module includes a flexible circuit board, several busbars, and several signal acquisition components. The flexible circuit board includes an upper surface and a lower surface arranged in opposite directions. The flexible circuit board has several connection ports arranged in the length direction of the flexible circuit board, and the connection ports penetrate the flexible circuit board in the height direction. The busbar is arranged on the upper surface and covers the connection ports. The signal acquisition component is arranged on the lower surface and connected to the busbar through the connection ports.

[0006] In the above technical solution, the flexible circuit board is provided with a connection port extending along its height. The busbar and signal acquisition component are respectively provided on the upper and lower surfaces and are connected to each other through the connection port, thereby achieving the connection between the busbar and the signal acquisition component without the need for plastic structural components. Without the spatial limitations of plastic structural components, users can increase the length of the flexible circuit board by an equal amount according to the number of battery cells in the module to add more signal acquisition points. Compared with re-molding plastic structural components, this can reduce production costs. By integrating the busbar and signal acquisition component into the flexible circuit board, the utility model can provide more signal acquisition points while reducing production costs.

[0007] Furthermore, the connection ports are in two rows.

[0008] In the above technical solution, two rows of connection ports are set so that two rows of busbars are correspondingly set on the flexible circuit board, one row of busbars corresponds to connecting one row of poles on the battery module, and the other row of busbars corresponds to connecting the other row of poles on the battery module. Different battery cells are connected through the two rows of busbars, and they are combined into battery packs in series or in parallel, and the electric energy is transmitted to the BMS system for management.

[0009] Furthermore, the signal acquisition component includes a signal acquisition component body and bending parts extending outward from both ends of the signal acquisition component body. The signal acquisition component body extends into the connection port and is attached to the busbar, and the bending parts are snap-fitted to the lower surface.

[0010] In this technical solution, the bent portion engages the lower surface of the flexible circuit board, providing a positioning mechanism that allows the welder to accurately solder the signal acquisition component to the flexible circuit board. The main body of the signal acquisition component extends into the connector and abuts the busbar. This design ensures a tight electrical connection between the signal acquisition component and the busbar, and also facilitates subsequent soldering of the signal acquisition component to the busbar.

[0011] Furthermore, the connection port is rectangular, and the length of the signal acquisition component body is adapted to the width of the connection port.

[0012] In the above technical solution, since the length of the signal acquisition component body is adapted to the width of the connection port, when the signal acquisition component body is inserted into the connection port, the two can achieve seamless docking, reducing connection problems caused by misalignment.

[0013] Furthermore, the busbar is provided with a mounting hole, and the mounting hole is opposite to the connecting port, so that the busbar is connected to the battery module.

[0014] In the above technical solution, the relative arrangement of the mounting hole and the connection port ensures that the busbar can establish a firm connection with the battery module through the mounting hole.

[0015] Furthermore, a plurality of pressure relief valve avoidance holes are provided in the middle of the flexible circuit board, and the avoidance holes are evenly spaced along the length direction of the flexible circuit board.

[0016] In the above technical solution, the design of the escape hole ensures that the flexible circuit board does not block or obstruct the pressure relief valve on the battery module during installation. The pressure relief valve is a critical safety component of the battery module, used to release pressure when the internal pressure of the battery increases abnormally, preventing the battery from exploding. Therefore, the presence of the escape hole ensures the normal operation of the pressure relief valve, improving the safety of the battery module.

[0017] Furthermore, the distance between two adjacent connection ports is the same.

[0018] In the above technical solution, the same spacing makes the layout of the connectors more standardized and modular, which means that in the design and production process, the interchangeability and versatility of components can be more easily achieved, reducing the complexity of design and manufacturing.

[0019] Furthermore, at least one busbar close to the end of the flexible circuit board extends outwardly to form a positioning portion, and the positioning portion is provided with a positioning hole.

[0020] In the above technical solution, during the assembly process, the positioning portion and its positioning holes serve as reference points or datum points for mounting the flexible circuit board and battery module, streamlining the assembly process and improving assembly efficiency. Furthermore, the positioning holes can be used in conjunction with other components (such as mounting brackets and fixing screws) to achieve rapid positioning and installation of the flexible circuit board.

[0021] Compared to existing technologies, the present invention offers the following advantages: by placing the busbar and signal acquisition component on the upper and lower surfaces of the flexible circuit board, respectively, and connecting them via connectors, the busbar, signal acquisition component, and flexible circuit board are integrated. This eliminates the space constraints of plastic structural components and allows users to increase the length of the flexible circuit board by an equal amount to accommodate the number of cells in the module, thereby adding more signal acquisition points. This reduces production costs compared to re-molding plastic structural components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the upper surface of an embodiment of the present utility model.

[0023] Figure 2 This is a schematic structural diagram of the lower surface of an embodiment of the present utility model.

[0024] Figure 3 This is a partial exploded view of an embodiment of the present utility model.

[0025] Figure 4 This is a structural diagram of a signal acquisition component according to an embodiment of the present utility model.

[0026] Explanation of Figure Numbers

[0027] 1. Flexible circuit board; 101. Upper surface; 102. Lower surface; 103. Connector; 104. Avoidance hole;

[0028] 2. Busbar; 201. Mounting hole; 202. Positioning portion; 2021. Positioning hole;

[0029] 3. Signal acquisition component; 301. Signal acquisition component body; 302. Bending part. DETAILED DESCRIPTION

[0030] The battery module of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0031] Please refer to Figures 1 to 3 In a preferred embodiment, the data acquisition device for a battery module of the present invention includes a flexible circuit board 1, a plurality of busbars 2, and a plurality of signal acquisition components 3. The flexible circuit board 1 includes an upper surface 101 and a lower surface 102 disposed opposite to each other. The flexible circuit board 1 is provided with a plurality of spaced connection ports 103 arranged along its length. The connection ports 103 extend through the flexible circuit board 1 in its height. The busbars 2 are provided on the upper surface 101 and cover the connection ports 103. The signal acquisition components 3 are provided on the lower surface 102 and connected to the busbars 2 through the connection ports 103. The signal acquisition components 3 collect data such as voltage and temperature on the battery module by connecting to the busbars 2. The busbars 2 serve as a bridge between the signal acquisition components 3 and the battery module, responsible for transmitting the collected data signals to the battery module or other processing units.

[0032] As can be seen from the above technical solution, the flexible circuit board 1 is provided with a connection port 103 that runs through its height. The busbar 2 and the signal acquisition component 3 are respectively provided on the upper surface 101 and the lower surface 102, and are connected to each other through the connection port 103, so that the busbar 2 and the signal acquisition component 3 can be connected together without the need for plastic structural parts. Without the space limitations of plastic structural parts, users can increase the length of the flexible circuit board 1 by an equal amount according to the number of battery cells in the module to add more signal acquisition points. Compared with re-molding and making plastic structural parts, production costs can be reduced. By integrating the busbar 2 and the signal acquisition component 3 into the flexible circuit board 1, the utility model can provide more signal acquisition points while reducing production costs.

[0033] Specifically, there are two rows of connectors 103. These two rows of connectors 103 allow for two corresponding rows of busbars 2 on the flexible circuit board 1. One row of busbars 2 connects to one row of terminals on the battery module, while the other row of busbars 2 connects to the other row of terminals on the battery module. The two rows of busbars 2 connect different battery cells, forming a battery pack in series or parallel, and transmit electrical energy to the BMS for management.

[0034] Please refer to Figure 3 and Figure 4The signal acquisition component 3 includes a signal acquisition component body 301 and a bent portion 302 extending outward from both ends of the signal acquisition component body 301. The signal acquisition component body 301 extends into the connection port 103 and abuts the busbar 2, and the bent portion 302 is engaged with the lower surface 102. The bent portion 302 provides a positioning function for the connection between the signal acquisition component 3 and the lower surface 102 of the flexible circuit board 1, so that the welder can accurately weld the signal acquisition component 3 to the flexible circuit board 1. At the same time, the engagement of the bent portion 302 with the lower surface 102 of the flexible circuit board 1 provides a fixing function, so that the welder can quickly weld the signal acquisition component 3 to the flexible circuit board 1. The signal acquisition component body 301 extends into the connection port 103 and abuts the busbar 2. This design ensures that a tight electrical connection is established between the signal acquisition component 3 and the busbar 2. At the same time, it helps to improve the convenience of subsequent welding of the signal acquisition component 3 and the busbar 2.

[0035] Please refer to Figure 3 The connector 103 is rectangular, and the length of the signal acquisition unit body 301 matches the width of the connector 103. Because the length of the signal acquisition unit body 301 matches the width of the connector 103, when the signal acquisition unit body 301 is inserted into the connector 103, the two achieve seamless docking, reducing connection issues caused by misalignment. This also increases the connection area between the signal acquisition unit body 3 and the busbar 2, enhancing the contact tightness between the signal acquisition unit 3 and the connector 103, thereby reducing the impact of external electromagnetic interference on signal transmission.

[0036] Please refer to Figure 3 , the busbar 2 is provided with a mounting hole 201, and the mounting hole 201 is opposite to the connecting port 103, so that the busbar 2 is connected to the battery module. The relative arrangement of the mounting hole 201 and the connecting port 103 ensures that the busbar 2 can establish a connection with the battery module through the mounting hole 201. In specific implementation, connection methods such as welding, bolt connection, and plug-in can be used. In this embodiment, the busbar 2 is connected to the battery module by welding. The welded connection usually has good electrical conductivity and can ensure efficient transmission of current or signals between the busbar 2 and the battery module. When in use, a laser is used to weld a circle along the circumference of the mounting hole 201 so that the mounting hole 201 establishes a firm connection with the battery module.

[0037] Furthermore, the flexible circuit board 1 is provided with several pressure relief valve clearance holes 104 in the middle, evenly spaced along the length of the flexible circuit board 1. The design of the clearance holes 104 ensures that the flexible circuit board 1 does not block or obstruct the pressure relief valve on the battery module during installation. The pressure relief valve is a critical safety component of the battery module, designed to release pressure when the internal pressure of the battery rises abnormally, preventing battery explosion. Therefore, the presence of the clearance holes ensures the proper functioning of the pressure relief valve, enhancing the safety of the battery module.

[0038] It should be noted that the distance between two adjacent connection ports 103 is the same. This uniform spacing makes the layout of the connection ports 103 more standardized and modular. This means that during the design and production process, the interchangeability and versatility of components can be more easily achieved, reducing the complexity of design and manufacturing.

[0039] In this embodiment, at least one busbar 2 near the end of the flexible circuit board 1 extends outwardly from a positioning portion 202, which is provided with a positioning hole 2021. During assembly, the positioning portion 202 and the positioning hole 2021 therein serve as a reference point or datum for mounting the flexible circuit board 1 to the battery module, simplifying the assembly process and improving assembly efficiency. Furthermore, the positioning hole 2021 can be used in conjunction with other components (such as mounting brackets and fixing screws) to facilitate rapid positioning and installation of the flexible circuit board 1.

[0040] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, 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 specific circumstances.

[0043] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A data acquisition device for a battery module, characterized in that: It includes a flexible circuit board, several busbars, and several signal acquisition components. The flexible circuit board includes an upper surface and a lower surface arranged in opposite directions. The flexible circuit board is provided with several connection ports arranged in the length direction of the flexible circuit board. The connection ports penetrate the flexible circuit board along the height direction. The busbar is provided on the upper surface and covers the connection ports. The signal acquisition component is provided on the lower surface and connected to the busbar through the connection ports.

2. The data acquisition device for a battery module according to claim 1, characterized in that: The connecting ports are arranged in two rows.

3. The data acquisition device for a battery module according to claim 1, characterized in that: The signal acquisition component includes a signal acquisition component body and bent portions extending outward from both ends of the signal acquisition component body. The signal acquisition component body extends into the connection port and abuts against the busbar, and the bent portions are engaged with the lower surface.

4. The data acquisition device for a battery module according to claim 3, characterized in that: The connecting port is rectangular, and the length of the signal collecting component body is adapted to the width of the connecting port.

5. The data acquisition device for a battery module according to claim 1, characterized in that: The busbar is provided with a mounting hole, and the mounting hole is opposite to the connecting port, so that the busbar is connected to the battery module.

6. The data acquisition device for a battery module according to claim 1, characterized in that: A plurality of pressure relief valve avoidance holes are provided in the middle of the flexible circuit board, and the avoidance holes are evenly spaced along the length direction of the flexible circuit board.

7. The data acquisition device for a battery module according to claim 1, characterized in that: The distance between two adjacent connection ports is the same.

8. The data acquisition device for a battery module according to claim 1, characterized in that: At least one busbar close to the end of the flexible circuit board extends outward to form a positioning portion, and the positioning portion is provided with a positioning hole.

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