Cooperative control method and device of energy conversion device, storage medium and vehicle

Abstract

The invention provides a cooperative control method and device of an energy conversion device, a storage medium and a vehicle. The cooperative control method comprises the following steps: obtaining first heating power according to target charging and discharging power, obtaining first quadrature-axis current and first direct-axis current according to target driving power, obtaining second heating power of the motor coil according to the first quadrature-axis current and the first direct-axis current, obtaining target quadrature-axis current and target direct-axis current, calculating the duty ratio of the reversible PWM rectifier and the duty ratio in the power switch module according to the target quadrature-axis current, the target direct-axis current, the target charging and discharging current, the sampling current value on each phase coil, the motor rotor position and the voltage sampling value of the alternating-current charging and discharging port, and controlling the reversible PWM rectifier according to the duty ratio. Current output by an external battery or power supply equipment flows through the motor coil to generate heat, and meanwhile two or three of the charging and discharging process, the heating process and the torque output process work cooperatively.

Description

technical field [0001] The present application relates to the field of vehicle technology, and in particular to a method, device, storage medium and vehicle for coordinated control of an energy conversion device. Background technique [0002] With the continuous popularization of electric vehicles, more and more electric vehicles will enter society and families, which will bring great convenience to people's travel. The power batteries in electric vehicles usually use lithium-ion batteries. The general operating temperature of lithium-ion batteries -20°C to 55°C, lithium-ion batteries are not allowed to be charged below low temperature. The solution for heating low-temperature batteries in the prior art is to use PTC heaters or electric heating wire heaters or engines or motors to heat the coolant in the battery cooling circuit at low temperatures, and use the coolant to heat the battery cells to a predetermined temperature . And when the battery is in a state of low tempe...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a cooperative control method, device, storage medium and vehicle of an energy conversion device, which can solve the problem of cost increase caused by heating the power battery with a heating device in a low temperature state, as well as the charging and discharging process, heating process and torque. The problem that two or three of the output processes cannot work together

Images