Method for improving lithium ion battery cycle cabinet point utilization rate

A lithium-ion battery and cycle cabinet technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of limited resources and slow research and development progress, and achieve the effect of improving utilization rate, saving time cost and resource cost

Active Publication Date: 2017-07-21
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Problems solved by technology

However, due to limited resources, the resear

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  • Method for improving lithium ion battery cycle cabinet point utilization rate

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Example Embodiment

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] like figure 1 As shown, a method for improving the utilization rate of lithium-ion battery circulation cabinets in this embodiment includes the following steps:

[0016] S1: Conduct a separate capacity test on single batteries of the same chemical system;

[0017] S2: connect the tested single cells in parallel for cycle test;

[0018] S3: Disassemble the batteries connected in parallel, carry out constant capacity test respectively, and record the current capacity;

[0019] S4: Take out the battery with unqualified capacity;

[0020] S5: Continue to conduct cycle test and capacity test on the battery with qualified capacity until the end of battery life, record the test results, and perform linear interpolation fitting based on the parallel test data starting capacity and the last week's test capacity to obtain the capacity decay of the battery.

[0021] In the ...

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Abstract

The invention relates to a method for improving a lithium ion battery cycle cabinet point utilization rate. The method comprises the steps of (1) carrying out individual capacity test on a single battery of a same chemical system, (2) connecting tested single batteries in parallel to carry out cycle test, (3) separating the batteries connected in parallel, carrying out a constant capacity test individually, and recording current capacities, (4) taking a battery with an unqualified capacity out, and (5) continuing to carry out a cycle test and a capacity test on a battery with a qualified capacity until a battery life is ended. According to the method, the capacity test is carried out after a certain number of cycles, thus the capacity attenuation of different weeks of the battery is determined, the fitting is carried out according to parallel test data, the capacity attenuation rate of the battery is obtained, and a resource guarantee is provided for smooth research and development.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for improving the utilization rate of circulation cabinets of lithium-ion batteries. Background technique [0002] With the rapid development of power lithium-ion batteries, the new energy industry has also received more and more attention from the state, and the substantial increase in lithium battery production capacity has increased the test requirements for battery performance. The speed of its research and development is accelerating, and the research and development cycle is shortening. The verification of the corresponding research and development process, especially the verification of cycle life, is particularly important. However, due to limited resources, the research and development progress is extremely slow. Contents of the invention [0003] The purpose of the present invention is to provide a method for improving the utilization rate of l...

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/3648G01R31/385
Inventor 厉运杰杨思文徐庆庆丁绍玉
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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