Lithium ion battery conformity screening method

Abstract

The invention discloses a lithium ion battery conformity screening method. The lithium ion battery conformity screening method comprises the specific steps that firstly, multiple battery cells of thesame specification are put in an environment at the same temperature to be left standing still, so that the temperature of each battery cell maintains to be consistent with the environment temperature; then, according to the unified charge-discharge requirement for the battery cells, full charge and complete discharge are conducted, and then full charge is conducted; then, the temperature of an environmental chamber is raised to 25+ / -2 DEG C, and meanwhile, the battery cells are left standing still in the environmental chamber under the temperature condition; then, when the temperature of thebattery cells maintains to be consistent with the temperature inside the environmental chamber, testing of the internal resistance of each battery cell is started, and meanwhile, internal resistance testing data of all the battery cells are recorded; and finally, the internal resistance data of all the battery cells are processed, and all the battery cells within a certain range are selected to begrouped or packaged. The lithium ion battery conformity screening method has the beneficial effects that by means of the screening method, system performance of lithium ion batteries can be improved,and the cask effect caused by the conformity problem of the battery cells is avoided.

Description

technical field [0001] The invention relates to the technical field of battery testing, in particular to a screening method for consistency of lithium-ion batteries. Background technique [0002] At present, the new off-line batteries are put into use after passing the simple static test. There is a lack of effective evaluation of the consistency of the battery cells, resulting in poor consistency after the batteries are assembled into modules or packages, and the service life and battery performance are poor. Less than effective play, increase the cost of use. Contents of the invention [0003] In view of the above-mentioned technical problems in the related art, the present invention proposes a screening method for the consistency of lithium-ion batteries, which can overcome the above-mentioned deficiencies in the prior art. [0004] For realizing above-mentioned technical purpose, technical scheme of the present invention is realized like this: [0005] A screening me...

AI Technical Summary

Problems solved by technology

[0002] At present, the new off-line batteries are put into use after passing the simple static test. There is a lack of effective evaluation of the consistency of the battery cells, resulting in poor consistency after the batteries are assembled into modules or packages, and the service life and battery performance are poor. Less than effective performance, increasing the cost of use

Images