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Pulse cycle life test method of nickel-metal hydride battery for electric automobile

A nickel-metal hydride battery, pulse cycle technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of unimproved electrolyte water electrolysis, low accuracy of test results, high cost investment, etc., and achieve short test cycle and improved Acceptability, the effect of reducing investment

Inactive Publication Date: 2017-02-22
CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pulse cycle life test method for Ni-MH batteries for electric vehicles, which mainly solves the problems of low accuracy of test results, low efficiency, high cost input and no improvement in electrolysis in the existing battery life test methods for electric vehicles. Problems such as electrolysis of water in liquid

Method used

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  • Pulse cycle life test method of nickel-metal hydride battery for electric automobile
  • Pulse cycle life test method of nickel-metal hydride battery for electric automobile
  • Pulse cycle life test method of nickel-metal hydride battery for electric automobile

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Embodiment

[0057] The invention provides a pulse cycle life test method suitable for nickel-metal hydride batteries used in electric vehicles, which mainly adopts the method of multiple battery discharge and intermittent pulse charge and discharge, and simulates the premise that the battery runs in the actual working conditions of the electric vehicle Under the condition of frequent starting, accelerating, braking, and stopping charging and discharging process, and then test the life of its pulse cycle. Test procedure of the present invention can be shown by following table:

[0058]

[0059]

[0060]

[0061] Remark:

[0062] (1) When the capacity test result in step 87 is lower than the specified value, stop the cycle test.

[0063] (2) The SOC of the test method of the present invention is cycled between 20% and 80%.

[0064] The above working steps are 29~60, and it takes 65.76h to complete 100 times.

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Abstract

The invention discloses a pulse cycle life test method of a nickel-metal hydride battery for an electric automobile. The method includes the steps: 1 discharging residues in the battery; 2 testing capacity of the battery; 3 testing internal direct-current resistance; 4 discharging residues in the battery; 5 circularly charging; 6 circularly discharging; 7 circularly charging; 8 circularly discharging; 9 circulating the seventh step and the eighth step for 100 times; 10 discharging residues in the battery; 11 testing internal direct-current resistance; 12 discharging residues in the battery; 13 testing capacity of the battery; 14 testing internal direct-current resistance; 15 discharging residues in the battery to finish test. The pulse circulation life test method is reasonable in design, strict in conception, high in test result accuracy and suitable for popularization and application and effectively solves the problems that an existing electric automobile battery pulse circulation life test method is low in test result accuracy and efficiency and high in cost investment, cannot improve water electrolysis in electrolyte solution and the like.

Description

technical field [0001] The invention relates to a test method, in particular to a pulse cycle life test method of a nickel-metal hydride battery for an electric vehicle. Background technique [0002] In the actual operation of electric vehicles, whether it is climbing acceleration, downhill braking, emergency braking, or frequent start and stop, high-temperature environment operation and other complex working conditions, pulse current will impact the battery instead of stable single constant current charging or discharge state. Therefore, it is necessary to conduct a pulse cycle life test on the Ni-MH battery of an electric vehicle in order to grasp its rechargeable discharge capacity and service life in time. [0003] However, the existing test methods are difficult to truly simulate the complex working conditions of electric vehicles in actual operation, so most of them are based on theoretical test methods, which have little reference value in practical applications. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/392
Inventor 聂靖轩戴润义杜小勇陈柯宇
Owner CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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