Novel power system of hybrid electric vehicle and circuit control method thereof

Abstract

The invention discloses a novel power system of a hybrid electric vehicle. The power system comprises a capacitance part and a high-voltage part which conduct signal transmitting through communication wiring harnesses. The capacitance part mainly comprises lithium-ion capacitance Pack and a master control BMS board, wherein one end of the master control BMS board is connected to the anode end of the lithium-ion capacitance Pack, and the other end of the master control BMS board is connected to the cathode end of the lithium-ion capacitance Pack through an electric current sensor. The master control BMS board is further connected with a slave control BMS board which is connected with a slave control relay, and the slave control relay is connected with and controls a fan. The high-voltage part comprises a relay C used for controlling on-off of an anode charging-discharging port circuit, a relay D used for controlling on-off of a pre-charging port circuit and a relay E used for controlling on-off of the cathode end of the lithium-ion capacitance Pack. On-off of the anode end of the lithium-ion capacitance Pack is further controlled by the relay C and the relay D. The invention further discloses a circuit control method of the power system. According to the novel power system of the hybrid electric vehicle and the circuit control method thereof, the voltage is balanced between lithium-ion capacitance single bodies, and a circuit control system is safe and reliable in use.

Description

technical field [0001] The invention relates to a novel power supply system and circuit control method for a hybrid electric vehicle. Background technique [0002] At present, energy problems are becoming increasingly prominent, and people are beginning to seek new energy sources to improve energy utilization efficiency. Hybrid electric vehicles have the characteristics of high efficiency, energy saving and environmental protection, so they are concerned and valued by people in the automobile industry. The power system is the core component of a hybrid electric vehicle. Improving the discharge energy efficiency of the power battery, prolonging the service life of the power battery, and improving the recovery rate of braking energy are one of the key factors for the development of efficient operation of hybrid electric vehicles. [0003] In the prior art, a hybrid electric vehicle uses a supercapacitor as an auxiliary starting power system. Although supercapacitors can meet...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a new power supply system and circuit control method for hybrid electric vehicles to solve the problems of low energy density and high self-discharge rate of supercapacitors, and the voltage balance of the single cells can ensure its safety , reliable use

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