Energy management system and method of compound power supply electric automobile and electric automobile

Abstract

The invention discloses an energy management system and method of a compound power supply electric automobile and the automobile. The energy management system comprises a signal collecting and processing device, an automobile road condition information collecting device, a vehicle controller and a compound power supply controller, wherein the signal collecting and processing device is used for collecting automobile state information of the electric automobile, the automobile road condition information collecting device is used for obtaining condition information of a to-be-run road which is away from the electric automobile for a preset distance; the vehicle controller is used for generating driving power according to the automobile state information and determining a target voltage of a super-capacitor bank according to the driving power, the to-be-run road condition information and the automobile speed of the automobile state information, and the compound power supply controller is used for distributing power of the super-capacitor bank and a power battery pack according to the driving power, the target voltage, a compound power supply signal of the automobile state information, a power threshold value of the power battery pack, a power threshold value of the super-capacitor bank and a power threshold value of a DC / DC converter. According to the energy management system and method of the compound power supply electric automobile and the automobile, power distribution of the super-capacitor bank and the power battery pack is more reasonable, the life of the power battery pack is prolonged, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle energy management, in particular to an energy management system and method for a composite power electric vehicle and the electric vehicle. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, the development of traditional fuel vehicles, one of the main pollution sources in cities, has been severely restricted. Energy-saving and environmentally friendly electric vehicles have become an inevitable trend in the development of the automobile industry. [0003] At present, power battery technology is still one of the main factors restricting the development of electric vehicles. Although the existing power battery technology can support the short-term high-power electricity demand of the vehicle under the working conditions of starting, accelerating and braking, frequent high-power charging and discharging also affects the service life and efficiency ...

AI Technical Summary

Problems solved by technology

Because only some influencing factors of the vehicle itself are considered, the power distribution between the power battery pack and the super capacitor pack is unreasonable and the work efficiency is low

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