Abstract
This paper proposes a modular battery management system for an electric motorcycle. The system not only can accurately measure battery voltage, charging current, discharging current, and temperature but also can transmit the data to the mixed-signal processor for battery module monitoring. Moreover, the system can control the battery balancing circuit and battery protection switch to protect the battery module charging and discharging process safety. The modular battery management system is mainly composed of a mixed-signal processor, voltage measurement, current measurement, temperature measurement, battery balancing, and protection switch module. The testing results show that the errors between the voltage value measured by the voltage measurement module and the actual value are less than 0.5%, about 1% under the conditions of different charging and discharging currents of 9 A and 18 A for the current measuring module, less than 1% for the temperature measurement module; and the battery balancing in the battery management system during the charging process. When the module is charged at 4.5 A for about 805 s, each cell of the battery has reached the balancing state. Finally, the testing results validate that the modular battery management system proposed in this paper can effectively manage the battery balancing of each cell in the battery module, battery module overcharge, over-discharge, temperature protection, and control.
Highlights
In recent years, due to the high use of the petrochemical industry, air pollution, and the serious greenhouse effect have caused more and more bad quality of human life
The battery management system of the electric vehicles is mainly composed of a mixed-signal processor, voltage measurement module, current measurement module, temperature measurement module, battery balancing module, and protection switch module
A modular battery management system is proposed for an electric motorcycle
Summary
Due to the high use of the petrochemical industry, air pollution, and the serious greenhouse effect have caused more and more bad quality of human life. The system has fast balancing and protection function, which uses the signal processor as the main controller and is equipped with a battery monitoring chip of multiple batteries It is capable of measuring the series and parallel type or monitor multiple independent battery modules by one control system. The battery management system can accurately measure the battery voltage, charge current, discharge current, and temperatures These data are transmitted to the mixed-signal processor for battery module monitoring, balancing, and protection. The testing results validate the modular battery measurement system proposed in this paper It has the functions of managing the battery balancing of each cell in the battery module, overcharge and over-discharge of the battery module, temperature protection, and control. The system has the potential to be applied in the battery management system of an electric motorcycle
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