Energy-saving power system of new energy vehicle and control method thereof

Abstract

The invention discloses an energy-saving power system of a new energy vehicle. The energy-saving power system comprises a power generation system, an energy storage system, a driving system and a control system, the power generation system and the energy storage system are arranged in parallel, and the driving system is connected with the power generation system and the energy storage system and used for receiving electric energy from the power generation system and / or the energy storage system. The power generation system keeps the internal combustion engine to work at the maximum power point or the characteristic power point with the lowest unit fuel consumption rate required by the system after the internal combustion engine is started; and the control system is electrically connected with the power generation system, the energy storage system and the driving system, and is used for judging the electric quantity condition of the energy storage system and controlling the energy storage system and / or the power generation system to supply power to the driving system. The invention further discloses an energy-saving power control method for the new energy vehicle, so that the internal combustion engine always runs at the maximum power point or the characteristic power point with the lowest unit fuel consumption rate required by the system, and the situation that the unit kilowatt-hour fuel consumption rate is too high when the internal combustion engine is in an idling state or in a partial load state is avoided.

Description

technical field [0001] The present invention relates to the technical field of energy-saving power systems for new energy vehicles, in particular to an energy-saving power system for new energy vehicles with an energy storage system provided by an internal combustion engine working at the maximum power point or the characteristic power point with the lowest unit fuel consumption rate required by the system and its control methods. Background technique [0002] With the shortage of energy and the further strengthening of environmental protection, various new energy vehicles have emerged at the historic moment. How to improve the efficiency of energy use and how to reduce the weight of the power system of new energy vehicles has become a problem to be solved by workers in this field. CN105015357A discloses a power system of an electric vehicle, which is electrically connected to the drive motor through an energy storage system including a battery to provide power to the drive ...

AI Technical Summary

Problems solved by technology

[0003] At present, no matter whether the new energy vehicles are oil-gas hybrid, oil-electric hybrid, or pure electric vehicles, the power source cannot always be operated under the most economical working conditions during driving, which causes waste of resources and greatly reduces efficiency.

Images