Lithium ion battery capacity detection method and device and computer readable storage medium

Abstract

The invention discloses a lithium ion battery capacity detection method. According to the method, first voltage at two ends of a battery is obtained when the battery is full of electricity and the first voltage is sent to an analog-digital converter; analog signals of the first voltage are converted into digital voltage values through the analog-digital converter, and average calculation is carried out on a preset quantity of continuously sampled digital voltage values to obtain first average voltage corresponding to the first voltage; and available voltage of the battery is determined according to a difference value between the first average voltage and preset discharging termination voltage, and a total capacity of the battery is calculated according to a preset voltage-capacity corresponding table. The invention furthermore discloses a lithium ion battery capacity detection device and a readable storage medium. According the lithium ion battery capacity detection method and device and the readable storage medium, the total capacities of batteries can be estimated according to voltage of the batteries without using a coulombmeter, so that the power management design is simple andreliable and the capacity estimation is close to real value, thereby reducing the material cost and time cost of electronic products.

Description

Technical field [0001] The present invention relates to the field of battery applications, in particular to a method, device and computer readable storage medium for detecting the capacity of a lithium ion battery. Background technique [0002] With the rapid development of portable mobile electronic products, the batteries that provide energy for these products have also been rapidly developed. Due to the different raw materials selected by different manufacturers, the tightness of battery packaging, production technology and other factors, the charging voltage and capacity of each lithium-ion battery are different from the parameters at the beginning of the design. For example, the nominal capacity is 1000mAh, which is actually produced. The capacity may deviate ±100mAh, the nominal full-charge voltage is 4.2V, and the fully-charged voltage actually produced may deviate ±0.15V or even higher. As a result, the lower end has an impact on circuit design, battery voltage sampling,...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a detection method, device and computer-readable storage medium for lithium-ion battery capacity, aiming to solve the technical problem that the battery capacity cannot be dynamically estimated without Coulomb timing

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