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Efficiency calculation model and optimization method for pure electric vehicle composite power system

A pure electric vehicle, system efficiency technology, applied in the field of efficiency calculation model and optimization of pure electric vehicle composite power supply system, can solve the problems of large power demand, shortening, low energy efficiency, etc., to prolong battery life, increase driving range, The effect of improving system efficiency

Active Publication Date: 2017-06-27
JIANGSU UNIV
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  • Abstract
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Problems solved by technology

2. The battery and the supercapacitor are jointly driven, and the power required by the system is relatively large. The battery alone cannot meet the power requirements well, and the supercapacitor auxiliary battery is driven together.
[0004] At present, the division of single and dual drive of hybrid power electric vehicles mainly relies on experience, and there is no reasonable theoretical basis, resulting in low energy efficiency during driving, unreasonable use of batteries, shortened design life, and failure to maximize driving range.

Method used

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  • Efficiency calculation model and optimization method for pure electric vehicle composite power system
  • Efficiency calculation model and optimization method for pure electric vehicle composite power system
  • Efficiency calculation model and optimization method for pure electric vehicle composite power system

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Embodiment Construction

[0039] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] Such as figure 1 As shown, a pure electric vehicle composite power system efficiency calculation model based on MATLAB, including: battery model 1, working mode logic judgment model 2, demand power generation model 3, system efficiency calculation model 4, super capacitor and DC / DC inverter The battery model 5; the battery model 1 is used to calculate the power loss of the battery under different working conditions; the working mode logic judgment model 2 is used to distribute the power flow of the system; the system demand power model 3 is used to provide road surface The required power is input as the system; the system efficiency calculation model 4 is used to summarize the power consumption of each model of the system to calculate the system efficiency η; the supercapacitor and DC / DC inverter model 5 are used to calculat...

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Abstract

The invention discloses a battery-electric-vehicle composite power system efficiency calculation model and an optimization method. The battery-electric-vehicle composite power system efficiency calculation model comprises a battery model, a working-mode logical judgment model, a demanded-power generation model, a system efficiency calculation model, a super capacitor and a DC-DC (direct current-direct current) inverter model. A simulation model is established under the environment of MATLAB / simulink, main consideration is given to loss of a battery and the super capacitor, efficiency characteristics of a motor is combined, system efficiency of the battery-electric-vehicle hybrid power is calculated, influences of variables of vehicle speed, vehicle acceleration and battery limit power on the system efficiency are compared, and a switching rule in a working mode is formulated. Therefore, energy utilization rate of a battery electric vehicle can be effectively increased, service life of the battery is prolonged, and travelling mileage is increased.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to an efficiency calculation model and an optimization method of a composite power supply system of pure electric vehicles. Background technique [0002] With the rapid development of the global automobile industry and the rapid growth of car ownership, the problems of energy crisis and environmental pollution are becoming more and more serious. With the official release of the "National "Twelfth Five-Year" Science and Technology Development Plan", the new energy vehicle industry technology will become a key area supported by the Ministry of Science and Technology in the next five years, so pure electric vehicles will receive more and more attention. [0003] As the government and society pay more and more attention to environmental pollution and energy issues, energy conservation and environmental protection have become one of the main goals of the development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 盘朝奉周文竟陈龙江浩斌陈燎汪若尘汪少华袁朝春杨晓峰张孝良
Owner JIANGSU UNIV
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