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

Abstract

This application proposes an energy conversion device, a collaborative control method, a device, a storage medium and a vehicle. The collaborative control method includes: obtaining the first heating power according to the target charge and discharge power, and according to the relationship between the first heating power and the target heating power. Obtain the target quadrature axis current and target direct axis current, and then calculate the number of each phase bridge arm in the PWM rectifier based on the target quadrature axis current, target direct axis current, target charge and discharge current, the sampling current value on each phase coil and the position of the motor rotor. One duty cycle, calculate the duty cycle of the bridge arm connected to the inductor in the reversible PWM rectifier based on the target charge and discharge current and the inductor current sampling value, then obtain the duty cycle of each phase bridge arm, and control the PWM rectifier according to the duty cycle. The current output by the external battery or power supply device flows through the motor coil to generate heat, and at the same time, two or three of the charging and discharging processes, the heating process and the torque output process work together.

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...

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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

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