Power control system of hybrid heavy duty truck with super capacitor

Abstract

The invention discloses a power control system of a hybrid heavy duty truck with a super capacitor. The system comprises an engine, a generator, a rectifier, an inverter, a motor controller and a motor which are sequentially connected, a storage battery and a first bidirectional DC-DC converter which are sequentially connected, a super capacitor and a second bidirectional DC-DC converter which aresequentially connected, a battery capacitance control unit, a signal acquisition unit, a triaxial gyroscope, a GPS positioning device and a power controller. Based on the control system, the invention further discloses a power control method of the hybrid heavy duty truck with the super capacitor, the road conditions on which heavy duty trucks frequently travel are related to super capacitor charging and discharging, so that the reasonable power matching is realized, the power performance, fuel economy and emission performance of the hybrid heavy duty truck are improved, the service life of the storage battery is prolonged, the energy recovery and utilization are realized, and the energy is fully saved.

Description

technical field [0001] The invention relates to the technical field of hybrid vehicle power vehicles, in particular to a power control system of a hybrid heavy-duty truck with a supercapacitor. Background technique [0002] In recent years, as the country has vigorously advocated the creation of a resource-saving and environment-friendly society, energy conservation and environmental protection have become the focus of attention. The high pollution and high energy consumption of traditional cars can no longer meet the development of the industry. Due to its remarkable advantages such as low energy consumption, high energy conversion efficiency, and environmental protection, hybrid technology has received high attention from the industry and strong support from the government. However, weaknesses in hybrid powertrain systems have limited widespread adoption of the technology. Therefore, improving the energy efficiency and control of the power system is of great significance...

AI Technical Summary

Problems solved by technology

In this kind of hybrid mode, under the complex working conditions of frequent acceleration, climbing, and sudden increase in driving resistance of hybrid heavy-duty trucks, the instantaneous peak current is large, and frequent high-current discharges will seriously affect the battery power supply. The energy efficiency and life of the battery are not conducive to the realization of the power performance of the whole machine; although the power performance of the whole machine can be guaranteed by using the engine generator set, the fuel economy and emission performance deteriorate, and the purpose of energy saving and emission cannot be achieved

At the same time, when the heavy-duty truck brakes, goes downhill, and the driving resistance suddenly decreases, the instantaneous charging current generated by the regenerative braking of the motor is very large, which will damage the battery life. If the energy recovered by this part cannot be fully stored, it will would be a huge waste

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