CAN bus-based pure electric vehicle charging method and system

Abstract

The invention discloses a CAN bus-based pure electric vehicle charging method and a CAN bus-based pure electric vehicle charging system. The charging system comprises a complete vehicle controller, a battery management controller, a power battery pack, a 12V storage battery, a charger and a DC converter. The controllers perform information interaction through the CAN bus; the complete vehicle controller manages and controls the complete vehicle system state; a battery management system acquires the information of the power battery and the 12V storage battery and transmits the battery information to the complete vehicle controller; the charger charges the power battery during work; and the power battery charges the 12V storage battery through DC/DC and provides a power supply for complete vehicle 12V electric equipment. The CAN bus-based pure electric vehicle charging method and the CAN bus-based pure electric vehicle charging system have the advantages of monitoring the complete vehicle system state, providing a working power supply for charging process-related controllers through the storage battery, flexibly controlling the charging of the storage battery through the DC converter and guaranteeing the complete vehicle safety in the charging process.

Description

technical field [0001] The invention belongs to the field of new energy vehicles, and particularly relates to a charging system and a charging control method for a pure electric vehicle. Background technique [0002] With the increasingly severe problems of energy shortage, environmental pollution and climate warming, countries around the world have paid more and more attention to the development of new energy vehicles, and have issued a series of incentive policies. New energy vehicles are becoming the development direction of the future automobile industry, while Pure electric vehicles have become one of the most promising new energy vehicles due to their relatively mature technology, economy, energy saving and emission reduction. As the only power source of pure electric vehicles, power battery directly affects the normal, safe and reliable operation of the vehicle. A good charging method can not only prolong the service life of the battery, but also ensure the safety of ...

AI Technical Summary

Problems solved by technology

[0003] The current pure electric vehicle charging technology generally only considers the safety protection of the battery during the charging process, but does not have good protection measures for the safety of the whole vehicle. It leads to danger. In the patent with publication number CN 101740830A, it is mentioned that when charging a pure electric vehicle, the battery management system will turn on and off the DC converter according to the SOC value. This method can only monitor the parameters of the power battery and cannot guarantee charging. Vehicle safety in the process

The electric vehicle charging maintenance method and device involved in the patent with the publication number of 101552361A also does not have the function of monitoring the vehicle system, and cannot guarantee the safety of the vehicle during the charging process.

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