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Method for testing battery peak power

A technology of peak power and test method, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of battery charging and discharging power difference, unable to effectively reflect battery peak power and other problems

Active Publication Date: 2012-01-18
ROYPOW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The charging and discharging current of the electric vehicle battery changes with the road conditions and the driving habits of the driver, which is an alternating current, which is different from the constant current or constant voltage constant current discharge mode tested by the battery manufacturer;
[0005] (2) There are differences in the charging and discharging power of batteries under different SOCs;
[0006] (3) There are differences in the charging and discharging power of batteries at different temperatures;
[0007] Therefore, the method of predicting the peak power of the battery based on the existing constant current discharge and constant voltage constant current charging curves cannot effectively reflect the actual peak power of the battery

Method used

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Examples

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Embodiment Construction

[0029] In view of the defects in the prior art, in order to facilitate the understanding of those skilled in the art, the present invention will be described in further detail below:

[0030] The battery peak power test method disclosed in this example takes the demand for pure electric passenger vehicles as an example, and conducts charge and discharge power tests at different temperature environments at -40°C to 60°C with a step of 10°C. The step of charge and discharge rate curve and the step of calculating the maximum allowable charge and discharge current of the battery according to the curve, the battery rate charge and discharge curve is obtained by the following method:

[0031] (1) Fully charge the battery at room temperature, and put the battery in the temperature environment to be tested for 2 hours (this time value is an empirical value, and the value varies according to different batteries to make the battery performance stable);

[0032] (2) Discharge at 0.1C of ...

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Abstract

The invention discloses a method for testing battery peak power, which comprises the steps of: measuring and calculating a battery multiplying power charge and discharge curve and measuring and calculating maximum allowable charge and discharge currents of batteries according to the curve. The battery peak power measured and calculated by using the method has high accuracy, a database is formed by measurement and calculation according to types of the batteries and is stored in a battery management system, the database can be directly scheduled through the battery management system during use, and power of the batteries can be fully utilized on the premise that the service life of the batteries is not influenced so that power performance of a vehicle is improved.

Description

technical field [0001] The invention relates to a method for testing the peak power of an electric vehicle battery. Background technique [0002] Electric vehicles have been widely valued by governments and automobile manufacturers for their advantages of energy saving and environmental protection, but the relatively weak performance of batteries has become a bottleneck for the promotion and application of electric vehicles, among which the contradiction between the high power demand of vehicles and the long life of batteries is the most important One of the core and difficult technical issues. If the control target is purely based on the high power demand of the vehicle, the probability of overcharging and over-discharging of the battery will increase significantly, and the battery life will be significantly shortened; on the contrary, if the control target is completely based on the battery life, users will not be able to get Good fun to drive. [0003] After the ex...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 刘飞阮旭松文锋
Owner ROYPOW TECH CO LTD
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