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

Abstract

This application proposes a cooperative control method, device, storage medium and vehicle of an energy conversion device. The cooperative control method includes: obtaining the first heating power according to the target charging and discharging power, and obtaining the first quadrature current and the first heating power according to the target driving power. Direct-axis current, according to the relationship between the first heating power and the target heating power to obtain the target quadrature-axis current and target direct-axis current, and then according to the target quadrature-axis current, target direct-axis current, target charge and discharge current, and the Sampling the current value and motor rotor position to calculate the duty cycle of each phase bridge arm in the PWM rectifier, calculating the duty cycle of the bridge arm in the power switch module according to the target charging and discharging current and the sampling value of the charging and discharging current, and controlling the PWM rectifier according to the duty cycle And the power switch module, so that the current output by the external battery or power supply equipment flows through the motor coil to generate heat, and at the same time realize the coordinated work of the two or three of the charging and discharging process, heating process and torque output process.

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...

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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

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