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
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AI-Extracted Technical Summary

Problems solved by technology

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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.

Application Domain

Electrical testing

Technology Topic

Cyclic testElectrical battery +5


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


  • Experimental program(1)

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 above steps, the tested single cells are connected in parallel to carry out the cycle test, and the number of cycles is 100-200.
[0022] This method can maximize the use of test cabinet resources while obtaining the required data in the test. For example, the support of test cabinet points can increase the work efficiency of cycle test utilization points by more than 5 times, thereby saving time and resource costs. The smooth progress of research and development provides logistical resource support, and conducts capacity tests after a certain number of cycles to establish the capacity attenuation of the battery for different cycles. According to the parallel test data, the starting capacity and the last week's test capacity are linearly interpolated and fitted, and the battery's capacity is obtained. Capacity attenuation provides resource guarantee for the smooth progress of research and development.
[0023] The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the scope of protection defined by the claims of the present invention.


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Description & Claims & Application Information

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