Integrated electric connection acquisition system of new energy vehicle-mounted battery

Abstract

The invention discloses an integrated electric connection acquisition system of a new energy vehicle-mounted battery, which belongs to the field of power batteries, and is characterized in that a master control circuit, a slave control circuit and a communication circuit for connecting the master control circuit and the slave control circuit are printed on a flexible circuit board, so that the use of a wire harness for connecting the master control circuit and the slave control circuit is avoided; when a running vehicle vibrates, the situation of unreliable wire harness connection does not exist, and stable communication between the master control and the slave control is guaranteed; and meanwhile, one circuit board is used for replacing two original circuit boards, so that the occupied space can be reduced to a certain extent. The problems of low communication reliability and low space effective utilization rate of an acquisition system in which a master controller and a slave controller are respectively printed on two hard circuit boards are solved.

Description

Technical Field

[0001] The present invention belongs to the field of power batteries, and particularly relates to an integrated electrical connection and acquisition system for new energy vehicle-mounted batteries. Background Art

[0002] The power battery of an electric vehicle consists of multiple battery modules. Each battery module includes a housing and multiple battery cells within the housing. To ensure the reliable operation of the power battery, it is necessary to monitor the operation process of the battery module. Generally, the voltage and temperature data of the battery cells are collected to grasp the performance status of the battery module.

[0003] The solution of the existing acquisition system is as follows: The system includes a master control, a slave control, sensors, and acquisition electrical connectors. The master control and the slave control are communicatively connected through a copper wire harness. The sensors are connected to the slave control through a wire harness. One end of the acquisition electrical connector is connected to the battery cell, and the other end is communicatively connected to the slave control. The slave control is mainly used to receive various types of data related to the battery, and the master control makes intelligent judgments based on the data of the slave control. Currently, the circuits of the master control and the slave control are respectively printed on rigid circuit boards, and the two circuit boards are communicatively connected through a wire harness. However, the vibration during the vehicle's driving will affect the reliability of the wire harness connection. At the same time, the two rigid circuit boards will also occupy the overall space of the power battery. The space occupied by the two rigid circuit boards can be used to place a battery cell to increase the overall capacity of the battery, which does not meet the requirement of efficient utilization of the battery space.

[0004] In summary, the existing acquisition system with the master control and the slave control respectively printed on two rigid circuit boards has the defects of low communication reliability and low effective space utilization rate. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated electrical connection and acquisition system for new energy vehicle-mounted batteries, so as to solve the technical problems of the existing acquisition system with the master control and the slave control respectively printed on two rigid circuit boards, which has the defects of low communication reliability and low effective space utilization rate.

[0006] To achieve the above purpose, the technical solution of an integrated electrical connection and acquisition system for new energy vehicle-mounted batteries provided by the present invention is as follows:

[0007] An integrated electrical connection and acquisition system for new energy vehicle-mounted batteries, including a plastic suction tray, a circuit board, and N aluminum bars. The aluminum bars are fixed on the plastic suction tray and are used for electrically connecting with the battery cell poles. The master control circuit, the slave control circuit, and the communication circuit for connecting the master control and the slave control are printed on the circuit board. The slave control circuit on the circuit board is electrically connected to each aluminum bar through a conductive member respectively, and is used for collecting voltage data, where N is equal to the number of battery cells.

[0008] As a further improvement, the circuit board is a flexible circuit board, which is fixed on the plastic tray.

[0009] As a further improvement, it also includes a temperature detection component fixed on the plastic tray. The temperature detection component is electrically connected to the slave control circuit of the circuit board and is used to collect the temperature data of the battery cell.

[0010] As a further improvement, the conductive component is a nickel sheet, and the nickel sheet is connected to the circuit board and the aluminum bar by welding.

[0011] As a further improvement, an aluminum bar groove is provided on the plastic tray for fixing the aluminum bar.

[0012] As a further improvement, the aluminum bar is used for welding and fixing with the battery cell pole.

[0013] As a further improvement, it also includes a communication interface provided on the circuit board. The communication interface is used to realize the communication between the master control circuit and the whole vehicle.

[0014] The beneficial effects of the integrated electrical connection and acquisition system of the new energy vehicle-mounted battery of the present invention are as follows: The present invention belongs to an improved invention. By printing the master control circuit, the slave control circuit, and the communication circuit for connecting the master control and the slave control on the flexible circuit board, the use of wire harnesses to connect the master control and the slave control is avoided, and there will be no unreliable wire harness connection when facing the vibration of the moving vehicle, ensuring the stable communication between the master control and the slave control; at the same time, replacing the original two circuit boards with one circuit board can also reduce the space occupation to a certain extent. It solves the problems of low communication reliability and low effective space utilization rate existing in the acquisition system where the master control and the slave control are respectively printed on two rigid circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the integrated electrical connection and acquisition system of the new energy vehicle-mounted battery in the present invention;

[0016] Description of the reference numerals:

[0017] 1. Flexible circuit board; 2. Aluminum bar; 3. Plastic tray; 4. Nickel sheet; 5. Communication interface; 6. Temperature detection component; 7. Connection line between the nickel sheet and the flexible circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0019] Embodiment of an integrated electrical connection acquisition system for new energy vehicle-mounted batteries:

[0020] As Figure 1 shown, the integrated electrical connection acquisition system for new energy vehicle-mounted batteries includes a plastic suction tray 3, a circuit board, and N aluminum bars 2; an aluminum bar groove for fixing the aluminum bar 2 is provided on the plastic suction tray 3, and the aluminum bar 2 is used for electrically connecting with the cell pole; the main control circuit, the slave control circuit, and a communication circuit for connecting the main control and the slave control are printed on the circuit board. The slave control circuit on the circuit board is electrically connected to each aluminum bar 2 through a conductive member for collecting voltage data, that is, the slave control can be electrically connected to the cell pole through the conductive member and the aluminum bar, thereby achieving the effect of collecting the cell voltage data. The N is equal to the number of battery cells. By printing the main control circuit, the slave control circuit, and the communication circuit for connecting the main control and the slave control on the circuit board, the system avoids using wire harnesses to connect the main control and the slave control, ensures the stable communication between the main control and the slave control, and further ensures the stability of the acquisition system. In addition, integrating the functions of two circuit boards onto one circuit board can also reduce the space occupation. The whole formed by multiple aluminum bars is an integrated busbar (CCS). The plastic suction tray can also be replaced by an injection tray.

[0021] Among them, the circuit board is fixed on the plastic suction tray 3 through thermal riveting posts. The aluminum bar 2 is used for fixedly connecting with the aluminum bar groove on the plastic suction tray 3, and this fixed connection is achieved through glue or rivets.

[0022] In order to further reduce the space occupation, the circuit board adopts a flexible printed circuit board 1 (Flexible Printed Circuit, abbreviated as FPC). The flexible printed circuit board 1 is fixed on the plastic suction tray 3. One flexible printed circuit board 1 replaces two rigid circuit boards. At the same time, the flexibility of the flexible printed circuit board 1 for fixing relative to the rigid circuit board is relatively high, reducing the space occupation of the main control, the slave control, and the connecting wire harness, and also increasing the flexibility of the structure design of the acquisition system. Since the flexible printed circuit board 1 is prone to deformation, the main control circuit and the slave control circuit are not welded on the flexible printed circuit board 1 in the prior art. In this application, by fixing the circuit board on the plastic suction tray 3, the flexible printed circuit board 1 is not prone to deformation, eliminating the unreliable defect caused by the easy deformation of the flexible printed circuit board 1.

[0023] Preferably, the temperature detection component 6 can be a temperature sensor, a thermistor, etc., and the conductive component can be a nickel sheet 4, a copper wire, an aluminum wire, etc. The nickel sheet 4 is connected to the circuit board and the aluminum bar 2 by welding; or the connecting wire 7 between the nickel sheet and the flexible circuit board is connected by a printed copper wire. The slave controller collects the corresponding temperature and voltage signals through the temperature detection component 6 and the conductive component, and the master controller calculates the battery SOC and SOH according to the signals collected by the slave controller.

[0024] It also includes a communication interface 5 arranged on the circuit board. The communication interface 5 is used to realize the communication between the main control circuit and the whole vehicle. The main control uploads the corresponding calculation results to the whole vehicle through the communication interface 5 for the whole vehicle to use.

[0025] Taking a 17-series battery module as an example, according to the actual assembly, the existing BMS acquisition circuit board only occupies a space of more than 40 mm. By using the integrated electrical connection acquisition system of the present application, this space can be saved. One battery cell can be placed in a width of 40 mm. The original 17-series can be increased to 18-series, greatly improving the energy density. In addition, the communication interconnection between the BMS acquisition main board and the slave board is simple. On the same circuit board, through the etching process, the communication line between the main board and the slave board is printed on the flexible circuit board 1, saving the connection wire harness, having a lower cost and a more reliable connection; the acquisition nickel sheet 4, the temperature probe and the acquisition chip on the acquisition board are also integrated on the same flexible circuit board 1 and are directly connected by printed copper wires, making the internal resistance lower and the acquisition accuracy higher, ensuring the accuracy of the single-cell voltage and temperature sampling of the vehicle under harsh working conditions.

[0026] The present application can further improve the energy density of the battery by reducing the space occupancy of the acquisition system. The acquisition system is integrated into a whole by a blister tray 3. During actual installation, the whole is placed on the surface of the battery, and the aluminum bar 2 is welded to the battery cell pole column to achieve electrical connection, thus completing the installation of the acquisition system on the battery.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An integrated electrical connection and acquisition system for a new energy vehicle battery, characterized in that, It includes a plastic suction tray, a circuit board and N aluminum bars. The aluminum bars are fixed on the plastic suction tray and are used for electrically connecting with the cell poles. The main control circuit, the slave control circuit and the communication circuit for connecting the main control and the slave control are printed on the circuit board. The slave control circuit on the circuit board is electrically connected with each aluminum bar through a conductive member respectively and is used for collecting voltage data. N is equal to the number of cells of the battery.

2. The integrated electrical connection and acquisition system for new energy vehicle-mounted batteries according to claim 1, wherein The circuit board adopts a flexible circuit board which is fixed on the plastic suction tray.

3. The integrated electrical connection and acquisition system for new energy vehicle-mounted batteries according to claim 1 or 2, characterized in that, It further includes a temperature detection member fixed on the plastic suction tray. The temperature detection member is electrically connected with the slave control circuit of the circuit board and is used for collecting the temperature data of the cells.

4. The integrated electrical connection and acquisition system for a new energy vehicle-mounted battery according to claim 1 or 2, characterized in that, The conductive member is a nickel sheet, and the nickel sheet is connected with the circuit board and the aluminum bar by welding.

5. The integrated electrical connection and acquisition system for a new energy vehicle-mounted battery according to claim 1 or 2, characterized in that, An aluminum bar groove is arranged on the plastic suction tray for fixing the aluminum bar.

6. The integrated electrical connection and acquisition system for a new energy vehicle-mounted battery according to claim 1 or 2, characterized in that, The aluminum bar is used for welding and fixing with the cell pole.

7. The integrated electrical connection and acquisition system for new energy vehicle-mounted batteries according to claim 1 or 2, characterized in that It further includes a communication interface arranged on the circuit board. The communication interface is used for realizing the communication between the main control circuit and the whole vehicle.

Images