An electric vehicle operation control method, device, controller and storage medium
An operation control and electric vehicle technology, applied in the field of electric vehicle operation control methods, controllers, storage media, and devices, can solve the problems of reduced service life, large fluctuations, overheating damage, etc., to ensure operating comfort and reduce junction temperature. The effect of fluctuation and safety protection
Active Publication Date: 2020-12-18
深圳市法拉第电驱动有限公司
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Problems solved by technology
[0002] When new energy electric vehicles are started on slopes, parked on flat ground, accelerated to start, catapult to start, and on steps, etc., the drive motor of the whole vehicle has stalled operation or low-speed continuous high-torque operation conditions, resulting in the core components of the drive. The local heating of the IGBT of the power switch module is severe and the junction temperature fluctuates greatly. There is a risk of overheating damage and reduced service life, which affects the safe operation of the vehicle.
The current operation control strategy cannot take into account the comfort of electric vehicles, the output power of the whole vehicle and the protection of the power switch module
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[0041] According to the situation learned by the inventor, when the new energy electric vehicle starts on a slope, parks and starts on flat ground, accelerates to start, ejects to start, and steps, etc., the drive motor of the whole vehicle has a stalled operation or a low-speed continuous high-torque operation. Due to the working conditions, the power switch module IGBT, the core device of the driver, is locally heated and the junction temperature fluctuates greatly. There is a risk of overheating damage and reduced service life, which affects the safe operation of the vehicle. There are several ways to deal with it at present:
[0042] First, when the electric vehicle is accelerating on a slope or stalled, the carrier frequency of the IGBT is adjusted according to the motor speed to reduce the loss of the IGBT, reduce the probability of IGBT damage, and improve the safety of the vehicle. However, this method only reduces the switching frequency of the power device based on t...
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The invention discloses an operation control method and device of an electric vehicle, a controller and a storage medium. The normal carrier frequency range of a finished vehicle is initialized, and the operation carrier frequency, the torque requirement and the power module junction temperature of the finished vehicle are monitored; if the operation carrier frequency is larger than the minimal value of the normal carrier frequency range, the operation carrier frequency of the finished vehicle is reduced; if the torque requirement of the finished vehicle is increased and the operation carrierfrequency is not larger than the minimal value of the normal carrier frequency range, derating is carried out based on the power module junction temperature; the carrier frequency is reduced in priority, the operation comfort is guaranteed, junction temperature fluctuation is reduced, derating is carried out based on the junction temperature, and the safety of a driver is guaranteed.
Description
technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle operation control method, device, controller and storage medium. Background technique [0002] When new energy electric vehicles are started on slopes, parked on flat ground, accelerated to start, catapult to start, and on steps, etc., the drive motor of the whole vehicle has stalled operation or low-speed continuous high-torque operation conditions, resulting in the core components of the drive. The local heating of the IGBT of the power switch module is serious and the junction temperature fluctuates greatly. There is a risk of overheating damage and reduced service life, which affects the safe operation of the vehicle. The current operation control strategies cannot take into account the operation comfort of electric vehicles, the output power of the whole vehicle and the protection of the power switch module. Contents of the invention [0003] In order ...
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IPC IPC(8): B60L15/20B60R16/02
CPCY02T10/72
Inventor 石华山
Owner 深圳市法拉第电驱动有限公司