Super capacitor-based electric automobile hybrid power control system

Abstract

The invention discloses a super capacitor-based electric automobile hybrid power control system. The system comprises a super capacitor, a power storage battery, a motor, a motor driving control device, a vehicle-mounted measuring unit, a first bidirectional direct current (DC) / DC converter and a second bidirectional DC / DC converter, wherein the motor driving control device is connected with the motor; the vehicle-mounted measuring unit is connected with the motor driving control device through a controller area network (CAN) bus; the first bidirectional DC / DC converter is connected between the super capacitor and the motor driving control device; and the second bidirectional DC / DC converter is connected between the power storage battery and the motor driving control device. Through the system, the super capacitor provides high-power current when an electric automobile is started and accelerated and climbs, so that the power performance of the entire automobile is enhanced; instant heavy current generated by a generator is quickly stored during braking; the braking feedback energy is absorbed; the energy is saved; and the cyclic service life of the storage battery is prolonged. By using the system, the power performance and the economy of the electric vehicle are improved, the storage battery is protected, and the stability of the system is enhanced.

Description

technical field [0001] The invention relates to the field of power devices of electric vehicles, relates to a hybrid power system composed of supercapacitors and accumulators for electric vehicles, and in particular to a hybrid control system for electric vehicles based on supercapacitors. Background technique [0002] In recent years, with the increasingly serious energy crisis and environmental problems, the fuel unsustainability and high pollution of traditional internal combustion engine vehicles have attracted more and more attention. Due to its advantages of energy saving, environmental protection and high energy conversion efficiency, electric vehicles have been highly valued by the industry and strongly supported by government departments. At present, an important reason restricting the rapid development of electric vehicles is the short driving range, and the weakness lies in the power system. How to improve the discharge energy efficiency and energy storage utiliz...

AI Technical Summary

Problems solved by technology

Although this design adds a switching device, which can control the discharge current at both ends of the battery, it cannot control the charging current, and the control accuracy is not high.

[0009]In addition, because the supercapacitor and battery voltage and temperature also have an impact on charging and discharging, the control systems in the above patents do not collect the supercapacitor and battery voltage and temperature and control

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