Calibration method and device for battery voltage sampling

Abstract

The invention discloses a method and a device for the calibration of battery voltage sampling and comprises the following steps: the invention uses a sampling module of the equipment which uses the battery for implementing the output voltage sampling of a controllable voltage source and acquires a reference sample value, and the output voltage of the controllable voltage source is recorded as a flag voltage value which forms a voltage reference point together with the reference sample value acquired from the voltage sampling, and then the invention changes the output voltage of the controllable voltage source for carrying out the sampling once again, thus acquiring a plurality of voltage reference points; the invention acquires the sampling value of the battery voltage through the batteryvoltage sampling, and computes the battery voltage through the sampling value of the battery voltage, the reference sample value in the voltage reference points which is close to the sampling value ofthe battery voltage and the flag voltage value which is corresponding to the reference sample value. The method can solve the problems of inaccurate sampling and oscillation when an on-chip analog-to-digital conversion module which has comparatively poor performance is used for the battery voltage sampling, and prevent the value offset problem which is introduced by the on-chip analog-to-digitalconversion module.

Description

technical field [0001] The invention relates to the field of electronic technology detection, in particular to a calibration method and device for battery voltage sampling. Background technique [0002] Due to many factors such as cost, the on-chip analog-to-digital conversion peripherals of the device are mostly used for battery monitoring of portable devices, that is, integrated in the processor ARM (Advanced RISCMachines, advanced reduced instruction set machine, microprocessor / technology / company), and these conversion modules cannot provide sampling performance equivalent to that of discrete analog-to-digital converters. When these conversion modules are directly used for sampling data calibration, sampling value inaccuracy and jumping problems will occur. Therefore, when using the on-chip analog-to-digital conversion module to calibrate the battery sampling data, the original simple processing method for discrete analog-to-digital converters cannot be used. Contents ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a battery voltage sampling calibration method and device to solve the problem of inaccurate sampling and jumping when using an on-chip analog-to-digital conversion module with relatively poor indicators to sample and monitor battery voltage

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