Pre-charging circuit, energy conversion device and vehicle

Abstract

The invention provides a pre-charging circuit, an energy conversion device and a vehicle, the pre-charging circuit comprises a first switch module, a second switch module, a third switch module, a first energy storage module and a second energy storage module, and an external battery, a pre-charging module and the first energy storage module in the first switch module form a first pre-charging loop; the external battery, the pre-charging module in the first switch module, the third switch module, the second energy storage module and the second switch module form a second pre-charging loop, sothat reuse of the pre-charging module is realized, and the utilization rate of the pre-charging module is increased; the first switch module, the second switch module and the third switch module are controlled to be completely disconnected in the pre-charging circuit, so that the battery and the power utilization circuit can be completely disconnected, the anti-interference performance is high, the EMC characteristic is good, the leakage current is reduced, the electrical connection between the battery and a discharging circuit is weakened, people can be prevented from being injured by electric shock, and the safety and the reliability are higher.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a precharging circuit, an energy conversion device and a vehicle. Background technique [0002] With the continuous popularization of electric vehicles, more and more electric vehicles will enter society and families, bringing great convenience to people's travel. Relevant subsidy policies for the construction of charging stations in various places are also planned or even introduced. Both the quantity and the distribution range have been greatly improved. However, due to the limitation of the mileage of pure electric vehicles, vehicle users are very concerned about the problem that the vehicle breaks down due to the exhaustion of the power source. Although many vehicle manufacturers remind the vehicle driver of the remaining battery power information and low battery warning information through the vehicle instrument or other methods, it is inevitable that the remaini...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the driving range of pure electric vehicles, vehicle users are very concerned about the problem that the vehicle breaks down due to the exhaustion of the power source.

Although many vehicle manufacturers remind the vehicle driver of the remaining battery power information and low battery warning information through the vehicle instrument or other methods, it is inevitable that the remaining power of the vehicle cannot meet the needs of the vehicle to drive to the location of the charging facility or the driver unconsciously When the vehicle is depleted

[0003] In order to avoid this problem affecting the experience of vehicle users on the use of pure electric vehicles, and even affect the use and promotion of pure electric vehicles, in order to meet the needs of the vehicle to replenish the vehicle when the battery is exhausted or the battery is so low that the vehicle energy storage device no longer outputs To meet the needs of electric energy, an energy storage inductor and an energy conversion circuit are installed in the vehicle to form a charging and discharging circuit with an external battery and an external charging and discharging port. Among them, the external battery and the energy storage inductor form a pre-charging circuit. The precharge of the circuit only works in the startup phase of the circuit, and the utilization rate is very low

Images