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Power battery pulse heating reliability test method

A power battery and pulse heating technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., it can solve the problems of long waiting time for heating, small heating rate, easy lithium precipitation of batteries, etc., so as to reduce the time of manual operation. , The effect of reducing the test cost and simplifying the operation difficulty

Active Publication Date: 2021-06-25
深蓝汽车科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing battery thermal management strategies use liquid heat or heating film, the heating rate is too small, and the user waits too long for heating, which cannot meet the needs of users; while DC charging and discharging heating will cause the battery to easily decompose lithium, which is safe. risk

Method used

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Embodiment Construction

[0032] Next, the embodiment of the present invention and the actual operation process of automatically controlling the pulse heating function of the bench to be turned on and off will be described in combination with the design schematic diagram of the present invention. Since it is necessary to protect the core technical points of the present invention, the illustrated embodiments are only part of the content of the present invention, but all belong to the protection scope of the present invention.

[0033] An embodiment of the present invention provides a power battery pulse heating reliability test method, which is used to verify the impact of power battery capacity decay after pulse heating of the power battery by a pulse current with a specific heating frequency and amplitude.

[0034] refer to figure 2 , the method includes in the embodiment of the present invention:

[0035] Step S1, build the bench system; after the build is completed, the host computer collects the ...

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Abstract

The invention relates to a power battery pulse heating reliability test method, which can verify the influence of pulse heating on the capacity fading of a power battery. The method comprises the steps that S1, a rack system is built, and the initial capacity of a power battery is collected, and the steps from S2 to S6 are cyclically executed; S2, the upper computer controls a 12V low-voltage power supply to perform low-voltage power-on; S3, the upper computer judges whether a pulse heating function is started or not; S4, if yes, the upper computer controls to start pulse heating of the power battery; S5, if the upper computer judges that the pulse heating function is not started any more, the upper computer controls to stop pulse heating of the power battery, and the current capacity of the power battery is acquired; S6, the upper computer judges the attenuation percentage of the current capacity of the power battery relative to the initial capacity of the power battery, and judges whether the attenuation percentage is greater than or equal to a preset percentage; and S7, if yes, the upper computer controls the 12V low-voltage power supply to be powered off so as to stop the test, and the total number of times of pulse heating of the power battery in the test process is recorded.

Description

technical field [0001] The invention belongs to the field of new energy power batteries, and in particular relates to a power battery pulse heating reliability test method. Background technique [0002] With the advancement of new energy technology and the state's encouragement and subsidy policies, market users are increasingly accepting lithium-ion electric vehicles, and electric vehicles have begun to appear in streets and alleys across the country. Our country has a vast territory, and the climate and environment vary greatly from place to place. For example, the temperature in North China is around -10°C, while the average winter temperature in Northeast China is -20°C. For Northeast users who purchase electric vehicles, the lowest temperature of electric vehicle batteries is around -20°C every morning when using the car, and the ambient temperature has a great impact on the performance of power batteries. In addition, the battery temperature is too low, which also cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/378G01R31/387G01R31/392
CPCG01R31/378G01R31/387G01R31/392Y02T10/70
Inventor 杨冬林杨涵赵刚张强陈坡邓承浩牟丽莎
Owner 深蓝汽车科技有限公司
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