A method for determining the energy of electric vehicle power battery under cycle conditions

A cycle working condition, power battery technology, applied in the direction of electrical digital data processing, instruments, calculations, etc., can solve the problems of low power battery energy calculation accuracy and insufficient power battery energy accuracy, so as to ensure the cruising range of the whole vehicle requirements, reduce R&D risk, and avoid the effects of insufficient accuracy

Active Publication Date: 2019-03-15
芜湖泰瑞汽车有限公司
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Problems solved by technology

[0005] In view of the above existing technical problems, the purpose of the present invention is to provide a method for calculating the power battery energy according to the cruising range requirement under the cyclic working condition, considering The energy consumption of the accessories of the whole vehicle can effectively solve the problem of low accuracy of power battery energy calculation

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  • A method for determining the energy of electric vehicle power battery under cycle conditions
  • A method for determining the energy of electric vehicle power battery under cycle conditions
  • A method for determining the energy of electric vehicle power battery under cycle conditions

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Embodiment Construction

[0030] The present invention is described in detail below, which is a preferred embodiment among various implementations of the present invention.

[0031] In a preferred embodiment, the method for determining the energy of a pure electric vehicle power battery pack includes the following steps:

[0032] Step 1: According to the design requirements of the vehicle, determine a certain cycle condition X adopted in the vehicle design and the cruising range S under this cycle condition;

[0033] Step 2: According to the selected cycle condition X, decompose it into several constant speed conditions i and several acceleration conditions j according to the content of the cycle condition;

[0034] Step 3: Determine the main parameters of the vehicle: m is the design weight of the vehicle in kg, g is the acceleration of gravity, f is the rolling resistance coefficient of the vehicle, u is the uniform speed of the vehicle in km / h, C D is the air resistance coefficient of the vehicle, ...

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Abstract

The invention relates to a method for determining energy of a power battery of an electric automobile under circulating working conditions. The method comprises the following steps of breaking down each circulating working condition of the pure electric automobile into a uniform speed working condition, an acceleration working condition and a brake working condition; respectively determining the energy requirements under each of the uniform speed working condition and acceleration working condition; determining the driving energy consumption of the whole automobile under the uniform speed working condition and acceleration working condition, so as to obtain the energy requirement of a power battery pack. The method has the advantages that in the early design period of the pure electric automobile, the energy of the power battery is calculated according to the endurance mileage requirement under the circulating working condition, the endurance mileage requirement of the whole automobile is guaranteed, the research and development risk of a project is decreased, and the defect of low calculation accuracy of energy of power battery according to endurance mileage requirement under the uniform speed working condition is overcome.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to a method for determining the energy of a power battery of an electric vehicle under cyclic working conditions. Background technique [0002] Drive motor, power battery, and vehicle controller are the main modules in pure electric vehicles, and their reasonable matching has a significant impact on the power performance and cruising range of pure electric vehicles. Among them, the power battery provides all the energy needed for the vehicle to drive, and its reasonable matching has a significant impact on reducing the overall quality of the vehicle, the manufacturing cost of the vehicle, increasing the mileage of the vehicle and improving user satisfaction. [0003] At present, in the matching process of the electric vehicle powertrain, the total energy value required is generally calculated according to the vehicle’s curb weight, full load weight, windward area, air...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG16Z99/00
Inventor 刘明明曹德本唐庆伟尹民鑫孙祥清
Owner 芜湖泰瑞汽车有限公司
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