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Secondary discharge battery internal resistance on-line detecting method

A discharge resistance and secondary discharge technology, which is applied in the direction of measuring resistance/reactance/impedance, measuring electricity, measuring devices, etc., can solve the problems that the uninterrupted power supply of loads cannot be guaranteed, and the uninterrupted power supply of important loads cannot be realized.

Inactive Publication Date: 2007-11-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is very short, it cannot guarantee the uninterrupted power supply of the load.
If an AC power failure occurs within this time, uninterrupted power supply for important loads cannot be achieved

Method used

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  • Secondary discharge battery internal resistance on-line detecting method
  • Secondary discharge battery internal resistance on-line detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Referring to Figure 1 and Figure 2, the power switch tube S is configured for each battery 1 and discharge resistor R 1 The discharge circuit I composed of and the power switch tube S 2 and discharge resistor R 2 Formed discharge circuit II,

[0025] Firstly, the discharge circuit I is connected to form the first discharge of the storage battery, and then the discharge circuit I is kept on, and the discharge circuit II is connected to form the second discharge of the storage battery. Due to the existence of equivalent capacitance inside the battery, at the initial moment of discharge, the discharge of the capacitor leads to the impact of the discharge current. After a few seconds, the discharge of the capacitor is completed, and the discharge current tends to be stable. At this time, the battery current I and battery voltage U are recorded. Then there are:

[0026] R b =(U 1 -U 2 ) / (I 2 -I 1 )

[0027] In the formula, R b is the internal resistance of the bat...

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PUM

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Abstract

The invention is a method of on-line detecting storage battery resistance by secondary discharge, characterized by arranging discharge circuits and II for each cell, adopting secondary discharge and difference value calculation method and thus able to effectively avoid the effect of output current of the rectified power supply, implementing on-line measurement of storage battery resistance and assuring uninterrupted power supply to load.

Description

technical field [0001] The invention relates to a method for on-line detection of the internal resistance of the storage battery in a power supply system using a battery pack as a backup power supply. Background technique [0002] The power supply system using battery packs as backup power is widely used in important occasions related to international people's livelihood such as power systems and communication base stations. The battery pack and the rectifier power supply form a complete set of equipment. Under normal circumstances, the rectifier power supply converts the AC power supply into DC power, and charges the battery pack while supplying power to the load to ensure that the battery is in a state of full capacity; when an AC power failure occurs, the battery pack discharges. It can supply power for important DC loads, and can also convert DC power into AC power through inverters to supply power for important AC loads. With the increase of the capacity of the power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R27/00
Inventor 黄海宏王海欣杨为
Owner HEFEI UNIV OF TECH
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