Cooperative control method and device of energy conversion device, storage medium and vehicle
An energy conversion device and collaborative control technology, which is applied in the field of vehicles, can solve the problems of increased cost, inability to cooperate with the charging and discharging process and heating process, and achieve the effect of realizing cooperative work, eliminating the need for heating devices, and reducing costs
Active Publication Date: 2021-03-26
BYD CO LTD
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Problems solved by technology
[0004] The purpose of this application is to provide a coordinated 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, and that the charging and discharging process and the heating process cannot be coordinated work problem
Method used
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[0057] As an implementation manner, when the motor coil includes multiple sets of windings, the heating power of the motor coil is calculated according to the following formula:
[0058]
[0059] Among them, P k is the heating power of the Kth set of windings, R sk is the phase resistance on each phase coil of the kth set of windings, i1n is the current on the nth phase coil of the first set, and iKn is the current on the nth phase coil of the Kth set.
[0060] Step S202. Obtain the bus voltage of the first bus capacitor, and obtain the heating power of the reversible PWM rectifier according to the sampling current value on each phase coil, the bus voltage of the first bus capacitor and the switching frequency of the reversible PWM rectifier;
[0061] Wherein, in this step, as an embodiment, the loss of the reversible PWM rectifier is calibrated in advance, and the reversible The heating power meter of the PWM rectifier, when obtaining the sampling current value on each p...
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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 steps of acquiring first heating power and actual zero-axis current of a motor coil according to sampling current values on each phase of coil; obtaining a first duty ratio of each phase of bridge arm according to the target heating power and the first heating power; acquiring target charging and discharging current according to the target charging and discharging power, acquiring target zero-axis current according to the target charging and discharging current, and performing closed-loop control according to the target zero-axis current and an actual zero-axis current to acquire a second duty ratio of each phase of bridge arm; and calculating the first duty ratio and the second duty ratio of each phase of bridge arm to obtain the duty ratio of each phase of bridge arm, and controlling a PWM rectifier according to the duty ratio, so that the current output by an external battery or power supply equipment flows through the motor coil to generate heat, and the cooperative work of a charging and discharging processand a heating process is realized at the same time.
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...
Claims
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IPC IPC(8): B60L58/27
CPCB60L58/27Y02T10/70
Inventor 廉玉波李吉成谢飞跃潘华刘益斌
Owner BYD CO LTD