Method for suppressing temperature effect of vehicle-mounted hybrid power source driving system

Abstract

The invention discloses a method for suppressing the temperature effect of a vehicle-mounted hybrid power source driving system. The method comprises the steps that temperature models of a storage battery, a supercapacitor, a power converter and a driving motor are established correspondingly, and power losses of the storage battery, the supercapacitor, the power converter and the driving motor under the temperature effect in the operation process of an electric vehicle are obtained according to the established temperature models; based on a multiply-divide optimization method, an objective function for minimizing the system total power loss and a corresponding constraint condition are established according to the power losses of the storage battery, the supercapacitor, the power converterand the driving motor; and according to the constraint condition, the objective function is solved to obtain minimum values of the storage battery power loss, the supercapacitor power loss, the powerconverter power loss and the driving motor power loss correspondingly. The temperature effect of the hybrid power source driving system is suppressed, the system loss is lowered from the source, thesystem efficiency is improved, and maximum utilization of energy is realized.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for suppressing the temperature effect of a vehicle-mounted hybrid power drive system. Background technique [0002] At present, the electric vehicle battery-supercapacitor hybrid power drive system has received extensive attention from scholars at home and abroad in the field of new energy vehicles. In this hybrid power supply, the battery takes advantage of its high energy density, and the supercapacitor takes advantage of its high power density. , and then meet the dual requirements of high energy density and high power density of electric vehicle loads. [0003] During the operation of electric vehicles, the temperature of the hybrid power drive system will increase accordingly, resulting in increased system power loss and reduced system operation efficiency. Therefore, how to suppress the temperature effect of the hybrid power drive system is currently facing scho...

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a method for suppressing the temperature effect of the vehicle-mounted hybrid power drive system, which effectively solves the problem of excessive system power loss and low system efficiency caused by the temperature suppression method of the existing hybrid power drive system. technical problem

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