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Method for measuring internal resistance of storage battery

A measurement method and storage battery technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of affecting measurement accuracy, increasing system complexity, and many interference factors, and achieve the effect of simplifying the complexity

Inactive Publication Date: 2006-04-26
ZHUHAI TITANS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that this method not only has many interference factors, but also increases the complexity of the system, and also affects the measurement accuracy.

Method used

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  • Method for measuring internal resistance of storage battery

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Embodiment Construction

[0016] Please refer to Fig. 1, a method for measuring the internal resistance of a storage battery in the present invention includes the first step: preparing four terminals, the above two terminals are used for measurement, and the other two terminals are used to provide a constant AC excitation current to the storage battery signal; the second step: the voltage response signal measured at both ends of the battery is multiplied by the sinusoidal voltage signal generated by the constant AC source through the AC differential circuit in the analog multiplier; the third step: the output from the analog multiplier The voltage signal passes through the low-pass filter circuit to convert the AC signal into a DC signal; the fourth step: amplify the DC signal through the DC amplifier, and then enter the analog-to-digital conversion module for analog-to-digital conversion. It is best to send the obtained digital signal to a single chip microcomputer for processing.

[0017] In this emb...

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Abstract

The invention discloses an accumulator internal resistance measuring method, which comprises the following steps: first, preparing four terminals with two for measuring and other two for supplying alternating current actuation current signal; second, letting pressure response signal of accumulator multiplied by the sine pressure signal of constant alternating current source in the analog multiplier; third, transforming the alternating current signal output of analog multiplier into direct current signal through low-pass filter circuit; forth, sending the magnified direct current signal into the modular transformation mode.

Description

【Technical field】 [0001] The invention relates to the field of storage batteries in power supply systems, in particular to a method for measuring the internal resistance of storage batteries. 【Background technique】 [0002] As a backup power source for power system failures, batteries have been widely used in industrial production, transportation, communications and other industries. If the battery fails or the capacity is insufficient, it may cause a major accident, so it is necessary to carry out comprehensive online monitoring of the operating parameters of the battery. One of the important signs of a good or bad battery is its internal resistance. Whether the battery is about to fail, the capacity is insufficient, or the charge and discharge are improper, it can be reflected in the change of its internal resistance. Therefore, the working state of the battery can be evaluated by measuring the internal resistance of the battery. At present, the common methods for measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R31/36
Inventor 李永富江莉
Owner ZHUHAI TITANS TECH
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