Battery short circuit identification method and device and storage medium
An identification method and identification device technology, which is applied in the direction of circuits, short-circuit tests, secondary batteries, etc., can solve the problems of unable to monitor changes in battery self-discharge rate, time-consuming, etc., and achieve the effect of improving identification efficiency and accuracy
Pending Publication Date: 2021-12-28
SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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Problems solved by technology
However, this method takes a long time, and it is impossible to monitor the change of the self-discharge rate of the battery during the battery test and the early and middle stages of use.
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0045] Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those s...
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The invention discloses a battery short circuit identification method and device and a storage medium. In the process of carrying out charge-discharge cycle test on a plurality of sample batteries, the self-discharge rates and the standing durations of the sample batteries in the standing stage are respectively obtained for multiple times to obtain the corresponding relationship between the self-discharge rates and the standing durations of each sample battery in the plurality of sample batteries, and the self-discharge rate threshold value is calculated according to the corresponding relationship. a charge-discharge cycle test is conducted on a target battery of the same type as the sample battery, the self-discharge rate of the target battery in the standing stage is obtained, whether the self-discharge rate is greater than a self-discharge rate threshold value is judged, and if the self-discharge rate is greater than the self-discharge rate threshold value, the charge-discharge cycle test is stopped and short circuit prompt is conducted. According to the scheme provided by the invention, the self-discharge rate test and the battery cycle test can be combined, the identification and early warning of the short circuit in the battery in the cycle process can be realized, the change of the short circuit in the battery can be found as early as possible, the early warning can be made in time, and the identification efficiency and accuracy are improved.
Description
technical field [0001] The present application relates to the technical field of batteries, in particular to a battery short-circuit identification method, device and storage medium. Background technique [0002] At present, lithium-ion batteries have been widely used as power sources for portable appliances because of their advantages such as high working voltage, high energy density, small size, large capacity, long cycle life, and no memory effect. A lithium-ion battery is composed of a positive electrode, a negative electrode, a separator, and an electrolyte. Due to the micro-short circuit between the internal positive and negative electrodes or the existence of trace impurities in the positive and negative electrode materials and electrolyte, the lithium-ion battery has a certain degree of self-discharge, that is, its power gradually decreases without loading. The self-discharge during the charging and discharging process of the battery is mainly composed of two parts:...
Claims
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Login to View More IPC IPC(8): G01R31/389G01R31/52H01M10/42H01M10/48
CPCG01R31/389G01R31/52H01M10/4285H01M10/48Y02E60/10
Inventor 刘芬李超林银利冷利民徐中领张耀
Owner SUNWODA ELECTRIC VEHICLE BATTERY CO LTD