Lithium ion battery consistence screening method

Abstract

The invention discloses a lithium ion battery consistence screening method. The method includes concrete steps of allowing standing of a plurality of electric cores of identical specifications in an environment having a constant temperature and enabling the temperature of the electric cores to keep consistent with the environmental temperature; according to uniform charge-discharge requirements ofthe electric cores, performing full charging, complete discharging and full charging again; raising the temperature of an environment cabin into 40+ / 2 DEG C and allowing standing of the electric cores in the environmental cabin in the above temperature condition; when the electric core temperature is consistent with that of the temperature in the environmental cabin, starting testing on voltage of the electric cores and recording voltage testing data of each electric core; and processing voltage data of all the electric cores and selecting all the electric cores in a specific range for grouping or packing. The invention has beneficial effects that the system performance of a lithium battery can be improved and cask effect due to a problem of consistency among the electric cores can be 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