Battery detection method

Abstract

The invention relates to the technical field of battery detection, in particular to a battery detection method. The battery detection method comprises the steps that 1, according to nominal parametersof a battery, a preset number of voltage calibration values are selected in a preset voltage interval; 2, the battery is subjected to charge and discharge test, and coulombmeter reading of the battery corresponding to each voltage calibration value and a charge-discharge curve are recorded; 3, according to the coulombmeter reading, the charge-discharge curve is subjected to calibration. Accordingto the technical scheme, the precise charge-discharge curve of the battery can be acquired, and the battery detection method is not limited by calibration platforms provided by manufacturers, can adapt to various battery models, and is high in reliability and real-time performance.

Description

technical field [0001] The invention relates to the technical field of battery detection, in particular to a battery detection method. Background technique [0002] With the popularity of embedded and intelligent platforms, the shipments of various handheld devices have grown explosively. On handheld platforms such as tablet PCs and smart phones, batteries and PMU (Power Management Unit, power management unit) devices are undoubtedly very important components. The PMU device is responsible for the charge and discharge management of the battery. At present, most PMUs have built-in coulomb counters, and the calculation of battery power is also done through the coulomb counters. Different batteries often have slightly different usage characteristics due to factors such as manufacturers, processes, and materials. In order to accurately calculate the power of the battery, each PMU manufacturer often provides a development platform, put the battery sample on the platform, and op...

AI Technical Summary

Problems solved by technology

[0003] The battery calibration platform provided by PMU device manufacturers has the following disadvantages: usually only individual battery samples can be calibrated, and the resulting data is not universal; the battery incoming materials are often not fixed during the production process, and there may be multiple suppliers, and the manufacturers provide The number of calibration platforms is often limited, and many times there is only one

To calibrate multiple batteries has to be processed in a queue, which is time-consuming and appears to be inefficient; battery characteristics, especially internal resistance parameters, are greatly affected by the actual printed circuit board layout of the hardware, since the calibration is only provided by the PMU manufacturer. It is obvious that some of the battery parameters obtained by calibration are not suitable for the target operating platform; the battery calibration scheme provided by the manufacturer often does not consider the charging and discharging efficiency of the battery

Since the charged power cannot be 100% converted into energy and stored in the battery, this causes the error to be accumulated for a period of time, and the percentage of power calculated by the software based on the parameters is not accurate.

At this time, it is easy to show that the battery power is still 100% on the UI, but actually shut down quickly

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