High-voltage power distribution unit of hybrid electric bus

Abstract

The invention relates to a high-voltage power distribution unit of a hybrid electric bus. The high-voltage power distribution unit comprises an ISG (integrated starter generator) motor controller for connecting ISG motor generating output, a driving motor controller for controlling and connecting a driving motor and an energy storing device, wherein the negative ends of the ISG motor controller and the driving motor controller are connected with the negative end of the energy storing device. The high-voltage power distribution unit also comprises a switching circuit for charging and discharging, wherein one end of the switching circuit is in short-circuit connection with the positive ends of the ISG motor controller and the driving motor controller, and the other end of the switching circuit is connected with the positive end of the energy storing device; and the switching circuit is composed of two parallel branches, wherein one parallel branch is composed of one group of contact terminals of a first contactor and a first resistance, and the other parallel branch is composed of one group of contact terminals of a second contactor. According to the invention, the number of electronic elements is reduced and the influence of the damage of electric elements on the high-voltage circuit of the whole bus is also reduced on the premise that the high-voltage power distribution pre-charging requirement of the whole bus is met.

Description

technical field [0001] The invention belongs to a high-voltage power distribution device, in particular to a high-voltage power distribution device for a common pre-charging circuit of a hybrid electric passenger car. Background technique [0002] At present, the energy storage device of most hybrid electric buses is a supercapacitor. In order to prevent the impact on the motor controller after the vehicle is powered on at high voltage and the impact on the supercapacitor during charging, the current is first limited by the pre-charging resistor. When the capacitor voltage in the circuit After reaching the rated value, the pre-charging resistance is short-circuited through the pre-charging contactor connected in series in the main circuit, and the whole circuit starts to work normally. The circuit composition is as follows: figure 1 shown. In the existing high-voltage power distribution device, the pre-charging circuit of the discharge circuit and the pre-charging circuit o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-voltage power distribution device for a hybrid electric bus, which is used to solve the problem of wasting components and occupying volume in the independent design of the charging circuit in the prior art

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