Hybrid motor vehicle energy storage device and method for using the device to energy regulation

Abstract

The invention relates to a mixed power vehicle power storage device and an energy adjusting method by virtue of the device, thus leading the mixed power vehicle energy storage device to have great power density and long service life. The technical proposal is that the invention is provided with an accumulator group and a capacitance group; a DC-DC converter is arranged between the capacitance group and the accumulator group; the invention is also provided with an inverter which is respectively electrically connected with the accumulator group, the DC-DC converter and a motor; the invention is also provided with a battery management unit which can control the DC-DC converter according to the voltage value and the current value of the accumulator group and the capacitance group. When a whole vehicle controller judges an automobile in brake state or retarding state according to a vehicle speed signal, a gun signal and a brake pedal signal, the signals are sent to the battery management unit and then enter a regeneration brake mode; the battery management unit controls the DC-DC converter by the voltage value and the current value of the accumulator group and the capacitance group, thus leading a motor working in a generator mode to charge the accumulator group and the capacitance group through the inverter.

Description

technical field [0001] The invention relates to an energy storage device of a hybrid electric vehicle and an energy adjustment method using the device. Background technique [0002] When driving in a city, due to red lights and traffic congestion, about 30% of the energy of a locomotive using an internal combustion engine in stop-and-go conditions is converted into heat and lost to the environment during braking. On the one hand, the cost of energy is increasing day by day, and on the other hand, the voice of environmental protection is on the rise, so it is imperative to store the wasted energy. The gasoline-electric hybrid vehicle uses the method of increasing the energy storage system to recover the braking energy, and at the same time It can assist the internal combustion engine to drive when climbing or accelerating. [0003] The energy storage of gasoline-electric hybrid vehicles uses conventional batteries (lead-acid batteries, nickel-metal hydride batteries, etc.). ...

AI Technical Summary

Problems solved by technology

Conventional storage batteries can provide large currents for a long period of time, but are very sensitive to large ripples, deep discharges, etc., even under the working cycle of full charge, current-limited discharge, and equalized charge, it can only charge and discharge repeatedly Hundreds to thousands of times, short cycle life

In addition, the power density of conventional batteries is very small

Since the charging and discharging process of the battery is a slow chemical reaction process, and the braking time of the car is very short, it is not enough to store a large amount of braking energy, and the energy recovery efficiency is low

In addition, when the car climbs, accelerates or starts, the energy storage unit is required to deliver a large current instantaneously, which is incompetent for the conventional battery pack, and the auxiliary drive performance is poor.

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