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Method for measuring internal resistance of storage battery based on differential equation

A measurement method and differential equation technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effect of simple calculation method and reliable measurement results

Inactive Publication Date: 2010-04-07
安凯
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to overcome the defects of the existing battery internal resistance measurement method by providing a battery internal resistance measurement method based on differential equations

Method used

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  • Method for measuring internal resistance of storage battery based on differential equation
  • Method for measuring internal resistance of storage battery based on differential equation
  • Method for measuring internal resistance of storage battery based on differential equation

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] figure 1 It is the model of the storage battery under the floating charging state, which is composed of charger 1, square wave generator 2 and storage battery 3, and their positive poles are connected to each other, and their negative poles are also connected to each other.

[0020] In the figure, E 1 Represents the voltage of the charger, R 1 Represents the internal resistance of the charger, I 1 Represents the current of the charger, R 0 , R 2 and C represent the resistance and capacitance of the battery internal resistance equivalent circuit, respectively, E 2 Represents the electromotive force of the battery, I 2 Represents the battery current, I 3 Represents the test current.

[0021] First, measure the voltage v at both ends of the square wave generator at the instant it is about to be disconnected when it is switched on 3bb , the ...

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Abstract

The invention relates to a method for measuring internal resistance of a storage battery based on differential equation, which comprises the following steps: connecting a square wave generator, measuring voltages at two ends of the square wave generator at the moment when the connected square wave generator is about to be disconnected, voltages at two ends of the square wave generator when the disconnected square wave generator is about to be connected and voltage at the moment of the connection of the disconnected square wave generator, and calculating ohm internal resistance value and polarization resistance value of the storage battery through a formula to judge the failure degree of the storage battery. The method can reflect the change of the internal resistance of the storage battery more accurately so as to judge the failure degree of the storage battery more accurately. Compared with the prior measurement method, the calculation method of the invention is simpler and more convenient, and the measurement result is more reliable.

Description

(1) Technical field [0001] The invention relates to a method for measuring the internal resistance of a storage battery, in particular to a method for measuring the internal resistance of a storage battery based on differential equations. (two), background technology [0002] Batteries are widely used in industrial production, transportation, communication and other industries as a backup power supply when the power system fails. If the battery fails or the capacity is insufficient, it may cause a major accident. Therefore, a comprehensive online monitoring of the operating parameters of the battery is of great significance for improving the safe operation of the DC system and improving the reliability and automation of the power supply system. . [0003] One of the important parameters of the consumption state of the 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 r...

Claims

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Application Information

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IPC IPC(8): G01R31/36G01R27/08
Inventor 安凯安培亮王晓英
Owner 安凯
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