Power battery management system for electric vehicle

Abstract

Disclosed is an electronic vehicle driving cell management system which comprises CAN bus, a main ECU, a sub ECU and a dual RAM which are connected on the CAN bus. The main ECU samples on the cell bus voltage and bus current; calculates SOC of the cell group; and completes the analysis of the cell's status, control on charging, discharging and temperature, and management on the cell. The sub ECU includes a monolithic computer, a cell equalizer, a monomer cell voltage sampling circuit, a monomer cell temperature sampling circuit and a communication interface for expanding CAN; wherein the output interfaces of each sampling circuit are connected with the signal input terminals of the monolithic computer via sampling wires. The dual RAM accepts the cell status data transmitted by the main ECU and the sub ECU; and it can work with other components on the vehicle to transmit data via CAN bus and works as a gateway. The monomer cell voltage and temperature sampling buses are separately connected with their corresponding sub ECU ports. The inventive system collects the working parameter of the cell group, performs calculation, analysis, management and control on the vehicle cell group.

Description

technical field [0001] The invention belongs to an automobile power supply control system, in particular to a power battery management system for an electric vehicle. Background technique [0002] Today, there is a serious shortage of oil resources, and countries are working hard to develop the electric vehicle industry. Among them, the power battery part is one of the important components of electric vehicles, and it is also the bottleneck affecting its development. Whether the power battery is reliable and safe determines the performance of electric vehicles to a large extent. In addition to the good performance of the power battery itself, the battery management system is also crucial to the efficient and safe operation of the battery, which determines the reliability and safety of electric vehicles to a certain extent. At present, no matter at home or abroad, the research on battery management technology is still in the exploratory stage. The solutions or products that...

AI Technical Summary

Problems solved by technology

At present, no matter at home or abroad, the research on battery management technology is still in the exploratory stage. The solutions or products that have been launched are not mature enough in technology, and the functions are relatively simple. Only the data sampling of battery voltage, current, and temperature is completed. It is just a battery data acquisition system, and it does not effectively manage and control the battery, which has unforeseen potential safety hazards for the battery and even the entire car

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