Energy conversion device, vehicle, cooperative control method and device and storage medium

Abstract

The invention provides an energy conversion device, a cooperative control method and device, a storage medium and a vehicle. The cooperative control method comprises the steps of obtaining first heating power according to target charging and discharging power, and obtaining target quadrature-axis current and target direct-axis current according to the relation between the first heating power and the target heating power; calculating a first duty ratio of each phase of bridge arm in a PWM rectifier 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 of coil and the position of a motor rotor, and calculating the duty ratio of a bridge arm connected with an inductor in a reversible PWM rectifier according to the target charging and discharging current and the inductance current sampling value; and obtaining the duty ratio of each phase of bridge arm, and controlling the PWM rectifier according to the duty ratio, so that the current output by an external battery or power supply equipment flows through a motor coil to generate heat, and meanwhile, two or three of a chargingand discharging process, a heating process and a torque output process cooperatively work.

Description

technical field [0001] The present application relates to the technical field of vehicles, and in particular to an energy conversion device, a vehicle, a cooperative control method and device, and a storage medium. 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 tem...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide an energy conversion device, a vehicle, a cooperative control method and device, and a storage medium, 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