Networking device of ring differential communication

Abstract

The invention relates to a networking device of a ring differential communication. The networking device comprises an MCU module, two SPI to differential communication high-speed conversion chips, andeight BMS daisy chain differential communication modules, wherein the eight BMS differential communication modules are in serial connection, any differential communication module is connected with abattery controller, a first input output end of the MCU module is connected with the eight BMS daisy chain differential communication modules through the first SPI to differential communication high-speed conversion chip, and the BMS daisy chain differential communication modules is connected with a second input output end of the MCU module through the second SPI to differential communication module so as to form a ring topology. Due to use of daisy chain differential communication, the networking device has the characteristics of being easy to realize and being low-cost in terms of hardware and software development, the ring communication manner is more reliable compared with CAN, further, the networking device has a simple circuit, is convenient to adjust parameters, has high stability,and is convenient to use.

Description

technical field [0001] The invention relates to the field of electricity, in particular to the differential communication technology of BMS in automotive electronics, in particular to a ring differential communication networking device. Background technique [0002] In the prior art, there are two main communication design schemes between BMS master and slave boards. One is CAN communication. CAN communication is a communication protocol developed by Bosch, which is widely used in the field of automotive electronics. The reliability of CAN bus data transmission is high, and in the BMS system, since the electric vehicle itself has a lot of noise disturbance from the motor, the advantages of CAN's anti-interference ability can be greatly amplified, but this solution needs to be installed on the board MCU and transceiver chip, the circuit cost is relatively high. [0003] The other is daisy chain differential communication. Compared with the traditional CAN bus communication,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a ring-shaped differential communication networking device. The ring-shaped differential communication networking device should solve the problem of high cost of the new energy vehicle battery management system in the prior art and the noise of the new energy vehicle motor. Large technical issues with strict requirements on system stability

Images