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Method and system of electric automobile battery test

A technology for electric vehicle and battery testing, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as power battery charging and discharging performance parameters and actual capacity testing and evaluation

Active Publication Date: 2013-03-20
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO +2
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AI Technical Summary

Problems solved by technology

[0003] Most of the existing tests for power batteries are to test whether batteries such as lithium iron phosphate and lithium manganese oxide can be used, that is, to test the availability of power batteries at the factory, but fail to test the charging and discharging performance parameters and parameters of power batteries. Actual capacity for accurate testing and evaluation

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  • Method and system of electric automobile battery test
  • Method and system of electric automobile battery test
  • Method and system of electric automobile battery test

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] The embodiment of the invention discloses an electric vehicle battery testing method and system, so as to realize the purpose of accurately testing and evaluating the charging and discharging performance and the actual capacity of the power battery.

[0040] figure 1 A method of testing an electric vehicle battery is shown, comprising:

[0041] Step 11: Charge the set of batteries with a first preset constant current until the voltage of a single battery ri...

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Abstract

The invention discloses a method and a system of electric automobile battery test. The method comprises a test of ganged electric automobile batteries that a first preset constant current is used for charging the ganged electric batteries until voltage of a certain battery cell is built up to a max charge voltage value, preset constant voltage is used for charging the ganged electric automobile batteries until charging current is reduced to a preset cut-off current value or the voltage of a certain battery cell reaches a protection voltage value, a second preset current is used for discharging the ganged electric batteries until the voltage of a certain battery cell is reduced to a max discharge voltage value and an actual capacity value is obtained after the discharge capacity of the ganged batteries is calculated according to consuming time of discharge. The steps are circulated until the actual capacity value is less than a preset capacity value continuously for a plurality of times, or the steps are circulated until cycle-index reaches a preset number. Omni-directional test and parameter learning of a power battery is achieved. Reference is provided for follow-up application of the power battery.

Description

technical field [0001] The invention relates to the technical field of electric vehicle battery maintenance, and more specifically, relates to an electric vehicle battery testing method and system. Background technique [0002] As an emerging means of transportation, electric vehicles are gradually entering people's lives with their advantages of energy saving and environmental protection. The power battery provides the power source for the electric vehicle. Whether the performance of the battery is stable or not is related to the operation continuity and safety of the electric vehicle. Therefore, the charging and discharging performance and capacity measurement of the power battery have become the focus of people's attention. [0003] Most of the existing tests for power batteries are to test whether batteries such as lithium iron phosphate and lithium manganese oxide can be used, that is, to test the availability of power batteries at the factory, but fail to test the char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 张帆徐磊戴咏夏林晓斌胡黎斌周鑫鸿
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO
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