Screening method for consistency of lithium ion battery
A technology of lithium-ion batteries and screening methods, which is applied in the field of battery testing, can solve the problems of service life and battery performance, lack of effective evaluation of battery consistency, and increase in use costs, so as to avoid short-board effects, The effect of increasing service life and improving system performance
Inactive Publication Date: 2018-07-17
BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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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
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[0019] 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. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0020] Such as figure 1 Shown, according to the screening method of a kind of lithium-ion battery consistency described in the embodiment of the present invention, comprises the following steps:
[0021] S1: Put several cells of the same type in the same temperature environment to keep the temperature of the cells consistent with the ambient temperature;
[0022] S2: According to the uniform charge and discharge requirements of the battery cell, perform full charge, full discharge, and then ...
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The invention discloses a screening method for consistency of a lithium ion battery. The method comprises the steps of firstly placing a plurality of same-type batteries in an environment with a constant temperature, thereby keeping the temperature of the battery same with an ambient temperature; then according to a unified charging-and-discharging requirement of the battery, performing charging-to-full, discharging-to-exhausted and charging-to-full; secondly, increasing the temperature of an environment chamber to 25+ / -2 DEG C, and simultaneously placing the batteries in the environment chamber with the temperature condition; then, when the temperature of the battery is same with the temperature in the environment chamber, starting capacity testing on the condition of 1C electric discharging, and simultaneously recording the capacity discharging data of each battery; and finally processing the capacity data of all batteries and selecting all batteries in a certain range for forming agroup or a pack. The screening method has beneficial effects of improving system performance of the lithium ion battery, and preventing a cask effect caused by a consistency problem between the batteries.
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...
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Login to View More IPC IPC(8): G01R31/36
CPCG01R31/385
Inventor 周泽华张君鸿高史贵
Owner BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD