Two-way active balancing electric vehicle battery monitoring system and control method based on PIC microcontroller

Abstract

The invention discloses a two-way active balance electric vehicle battery monitoring system and control method based on PIC single chip microcomputer, including a lithium battery monitoring module for real-time monitoring of the voltage of a single lithium battery in a battery pack, and realizing two-way active balance between battery packs. An equalizing module for operation, a control module for implementing system control using a PIC18LF27K40 chip, and an isolated communication module for implementing SPI communication between the control module and the lithium battery monitoring module. The invention adopts the special charge balancer LTC3300-1 to realize the bidirectional active balance between the battery pack and the individual batteries, shorten the voltage balance time, improve the charge transfer efficiency, improve the integration and accuracy of the system, reduce the cost, and set the current The detection module detects the current when the battery is charged and discharged to ensure the normal operation of the system and improve the reliability of the system.

Description

technical field [0001] The invention relates to an electric vehicle battery monitoring system, in particular to a PIC single-chip microcomputer-based two-way active balancing electric vehicle battery monitoring system and a control method. Background technique [0002] With the global auto industry facing the huge challenges of financial crisis and energy and environmental issues, people put forward the concept of new energy vehicles. The development of pure electric vehicles, the realization of the electrification of automobile energy and power systems, and the promotion of the strategic transformation of the automobile industry have formed an international consensus. One of the core technologies of electric vehicles is battery technology. Batteries are the power source of electric vehicles and the main factor restricting the development of electric vehicles. Therefore, the management of electric vehicle batteries is very important. Electric vehicle battery management sy...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a two-way active balancing electric vehicle battery monitoring system and control method based on a PIC microcontroller, which solves the problems of high design cost, low reliability and low balancing accuracy of the existing battery balancing system

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