Distributed battery management system for electric vehicle

Abstract

The invention discloses a distributed battery management system. The system consists of two subsystems which are a master control system and a battery monitoring system respectively. The master control system consists of a microprocessing module, a relay control and diagnosis module, a handshaking signal transceiver module, a controller area network (CAN) transceiver module, a nonvolatile memory module and a wireless communication module. The battery monitoring system comprises a battery pack and battery monitoring modules. The system can acquire the voltage status, temperature status and like of batteries by the battery monitoring modules on each battery and perform balancing control on the battery pack with great status differences to improve the consistency and safety of the whole battery system. A wireless communication function of the system effectively isolates physical connection between a high-voltage system and a low-voltage system and improves the reliability of the master control system at the same time. The status of the battery system can be accurately monitored, the performance of the battery system can be fully utilized and the safe and reliable running of the battery system can be ensured.

Description

technical field [0001] The invention belongs to the field of new energy vehicle battery systems, and in particular relates to a distributed battery management framework. Background technique [0002] Entering the 21st century, energy has declined sharply. As automobiles are major oil consumers, batteries have become one of the most effective ways to replace fuels. At present, there are various batteries used in automobiles (lead-acid, lithium, nickel-metal hydride batteries, etc.), and better use of batteries requires an excellent battery management system. At present, battery management systems are widely used, and it can grasp the battery operating status in real time Information, and control and adjustment, so that the safety of battery discharge is guaranteed. At the same time, the battery management system can detect indicators such as voltage, current and temperature, calculate its capacity, and transmit it to other control systems in real time to cooperate with other...

AI Technical Summary

Problems solved by technology

[0006]One: The insulation design of the high-voltage and low-voltage parts of the battery management system is not perfect, and the voltage of the vehicle battery is relatively high. Very important meaning:

[0007] 2: At present, most of the communication between the battery and the main control chip adopts a physical direct connection method, which will introduce design issues such as high-voltage safety and high-voltage electromagnetic interference, and affect battery status monitoring

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