The invention discloses a hybrid electric vehicle compound power supply with maximally optimized energy efficiency and a method of the hybrid electric vehicle compound power supply. The compound power supply comprises a storage battery, a super-capacitor and a DC/DC converter, wherein the super-capacitor is serially connected with the DC/DC converter and then parallelly connected with the storage battery. The optimization method includes the steps: building mathematic models of the storage battery, the super-capacitor and the DC/DC converter; solving the loss of each model and the total power loss; concluding limiting conditions of the total loss to obtain an energy efficiency maximizing optimization model; solving by an approximate programming method; approximating a target function and constraint conditions of the optimization model as a linear function, solving the linear function by a simplex method, and taking an optimal solution meeting original conditions as a final solution of the optimization model. Power loss of an optimized compound power supply energy storage system is greatly reduced as compared with power loss before optimization, and energy use rate is increased. Working points of high-efficiency areas of the storage battery and the super-capacitor are increased and more densely distributed.
Hybrid electric vehicle compound power supply with maximally optimized energy efficiency and method of hybrid electric vehicle compound power supply
2015-04-01
Patent
Electronic Resource
English
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
Hybrid electric vehicle low-voltage power supply system, control method and hybrid electric vehicle
European Patent Office | 2021
|