A battery management system with charging high voltage interlock function

Abstract

The invention discloses a battery management system with a charging high-voltage interlocking function. The battery management system comprises a power battery pack, a high-voltage power interlockingmodule and a battery management module. A switch port of the power battery pack is connected with the battery management module. The output end of the battery management module is connected with the high-voltage power interlocking module through a wireless transceiver. The output end of the high-voltage power interlocking module is connected with a controllable high-voltage direct current contactor. The drive end of a motor controller is connected with a motor. The battery management module comprises a master controller and a CAN bus communication interface. The signal end of the master controller is connected with the wireless transceiver through the CAN bus communication interface. The system monitors a high-voltage loop of a battery electric vehicle in real time, and various types of feedback information is provided through a human-computer interaction interface, so that the high-voltage loop is effectively controlled in the starting and stopping processes of the battery pack and analarm is given in time when the high-voltage loop breaks down.

Description

technical field [0001] The invention relates to the technical field of battery management systems, in particular to a battery management system with a high-voltage charging interlock function. Background technique [0002] Modern electric vehicles are generally divided into pure electric vehicles, hybrid vehicles, fuel cell electric vehicles, external rechargeable hybrid vehicles and extended-range electric vehicles. Pure electric vehicles refer to electric vehicles that are completely driven by batteries, and the working voltage is as high as several hundred volts, which is much higher than the safe voltage. And when the high-voltage system is working, the discharge current may reach tens of amperes, or even hundreds of amperes. When the high-voltage circuit has insulation, short circuit and leakage, it will directly cause harm to the personal life and property safety of drivers and passengers. The current battery management system still needs to be improved: [0003] (1)...

AI Technical Summary

Problems solved by technology

[0004] (2) Since there is a high-voltage AC system on the pure electric vehicle, which has strong electromagnetic interference, a ground loop is formed between the two to couple the noise to the signal line through common impedance coupling, and the input and output signal lines are easily arranged together to cause interference.

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