Accumulator cell real time on-line nondestructive accurate measurement method

A technology of precise measurement and battery, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve timely operation data, accurate detection of battery internal resistance, and network management

Inactive Publication Date: 2008-04-09
CHUXIONG POWER SUPPLY BUREAU OF YUNNAN POWER GRID CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The method of the present invention adopts a new method for determining and acquiring the injected AC signal, and effectively solves the problem of measurement accuracy. The method of the present invention has a simple structure and is convenient to control. The method of the present invention injects a low-frequency AC weak signal into the storage battery, Detect the AC signal phase between the input and output terminals of each battery, and the phase difference between the two can accurately reflect the internal resistance of the battery

Method used

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  • Accumulator cell real time on-line nondestructive accurate measurement method
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  • Accumulator cell real time on-line nondestructive accurate measurement method

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Embodiment Construction

[0020] As shown in Figure 1, the present invention uses a low-frequency AC signal generator to inject a low-frequency AC current signal into the battery, and uses the AC current signal to measure the low-frequency AC voltage V at both ends of the battery. 0 and the low-frequency AC current Is flowing, and the low-frequency AC voltage V measured by the differential area method 0 and the phase difference α of the low-frequency AC current Is flowing through; the low-frequency AC signal generator 1 of the present invention collects the monomer DC voltage and AC voltage signal of the storage battery through a voltage sampling module through a coupling drive amplifier circuit, and then collects the collected AC The voltage signal and the DC voltage signal are sent to the multi-channel conversion switch after the low-pass active filter removes the interference signal, and then sent to the single-chip microcomputer for acquisition through A / D conversion to obtain its amplitude; the AC ...

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Abstract

The invention discloses a real-time and online method for lossless and precise measurement of storage batteries. The invention uses a low frequency and alternating signal generator to infuse the storage battery with low frequency and alternating signal, thus measuring the low frequency and alternating voltage at both ends of the storage battery, the low frequency and alternating electric current through the storage battery, and the phase difference between both ends. The invention achieves reliable real-time and online monitoring, provides rich and timely operating data to people who maintain the service of storage batteries, and greatly improves the maintenance level of the service of storage batteries, and the invention is markedly characterized by reliable data acquisition and precise detection of the essential resistance of storage batteries.

Description

Technical field: [0001] The invention belongs to the technical field of real-time on-line monitoring of storage battery internal resistance in a DC system of a substation in the electric power industry. Background technique: [0002] Lead-acid batteries have been widely used in industrial production, as well as industries such as electric power, transportation, and communication, as a backup power source for substation power supply systems in the power industry. One of the important signs of the state of the battery is its internal resistance. Therefore, it will be of great practical significance to realize the online real-time monitoring of battery internal resistance. The current status of similar technology is at the domestic level: the internal resistance is measured by the discharge method through an external load module, and no remote control is realized. [0003] Its disadvantages are: ①. The internal resistance measurement can only be completed if the staff arrives...

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Application Information

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IPC IPC(8): G01R31/36G01R25/00G01R27/14
Inventor 杨昌武冯正华董兴海廖晓峰冯俊宗武全福
Owner CHUXIONG POWER SUPPLY BUREAU OF YUNNAN POWER GRID CO LTD
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