Regenerative braking energy storage device for electric automobile

Abstract

The invention belongs to the technical field of automobile energy-saving equipment, and relates to a regenerative braking energy storage device for an electric automobile. An ultracapacitor module stores the regenerative braking feedback energy of the electric automobile and is connected in parallel with a storage battery to power an electric motor when the electric automobile starts and accelerates; an ultracapacitor charge-discharge controller is electrically connected with the ultracapacitor module, the storage battery and the driving controller respectively; the ultracapacitor charge-discharge controller is electrically communicated with the ultracapacitor module to control the charge-discharge process; and the driving controller is electrically communicated with the electric motor to achieve control operation of the electric motor. According to the invention, ultracapacitors store the regenerative braking feedback energy of the electric motor car to prevent adverse effects on the power supply of the electric automobile due to frequent charge and discharge, so as to achieve a long service life, and the ultracapacitors have high power density and good dynamic response.

Description

Technical field: [0001] The invention belongs to the technical field of energy-saving equipment for automobiles, and relates to an environment-friendly driving control type supercapacitor regenerative braking energy recovery and utilization system for electric vehicles, in particular to a regenerative braking energy storage device for electric vehicles. Background technique: [0002] Existing electric vehicles are likely to cause constant changes in their power demand curves during frequent starting, climbing and braking, especially in urban road conditions. Usually, the ratio of the peak power to the average power of a high-performance electric vehicle can reach 16:1, but the characteristic of these peak powers is that the duration is generally relatively short and the required energy is not high. For pure electric vehicles, this means that either the car is not powerful enough, or the voltage bus is often subjected to large peak currents, which will undoubtedly damage the ...

AI Technical Summary

Problems solved by technology

The main disadvantage of this technical solution is that the battery will be frequently charged and discharged with high current when the vehicle is frequently braked and started, because overcharging and overdischarging will cause certain losses to the battery and affect the life of the battery; The only power supply, when the vehicle accelerates or climbs a hill, the battery will be discharged with a large current, which is not good for the life of the battery

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