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50 percent discharge capacity test method for valve-controlled type sealed lead acid storage battery

A technology of lead-acid battery and discharge capacity, applied in the direction of measuring electric variables, measuring electricity, measuring devices, etc., can solve problems such as heavy workload, dangerous DC power supply system, etc., and achieve huge social benefits

Inactive Publication Date: 2010-07-07
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for efficient monitoring and controlling of voltage fluctuating events that can occur during power grids by utilizing valves controlled sealed leads acid batteries with specific capacities. These batteries provide energy savings while also reducing environmental impacts compared to traditional methods like rebuilding them after they're used up.

Problems solved by technology

Technological Problem addressed in this patents relates to improving the reliability and accuracy of testing batteries during their use without requiring manual labor. Current methods involve fully charging them up until they reach full capacity before being tested again, which may result in damage to other components inside the circuit due to overheating or excessively dry electrolyte conditions.

Method used

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  • 50 percent discharge capacity test method for valve-controlled type sealed lead acid storage battery
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  • 50 percent discharge capacity test method for valve-controlled type sealed lead acid storage battery

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Embodiment Construction

[0025] 50% discharge capacity test (or state evaluation) method of the present invention is based on 10 hour rate (0.1C 10 ) discharge current, a check discharge performed after discharge for 5 hours. Corresponding to half of the 100% depth of discharge, the discharge curve is consistent with the discharge curve 5 hours before the 100% discharge depth check discharge, and the discharge termination condition corresponds to the remaining capacity of 80% of the rated capacity (C 10 ), so the final determination of the capacity of the battery pack under test is based on the unified provisions of the current standards and specifications, that is, "when the termination voltage reaches 1.8V, the remaining capacity shall not be less than 80% of the rated capacity (C 10 )".

[0026] The present invention collects and screens the discharge data of 23 electric utility bureaus in the Sichuan electric power system from 2005 to 2009 through the inventor's related subject research. The inf...

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Abstract

The invention relates to a 50 percent discharge capacity test method for a valve-controlled type sealed lead acid storage battery, which belongs to an online discharge test method for a lead acid storage battery for power engineering. The method comprises the following steps of: connecting protecting devices at both ends of an outlet fuse protector of an estimated storage battery pack in parallel and switching off the fuse protector so that the protecting devices is connected in series in a power supply loop from a storage battery to a direct current bus; carrying out online 50 percent discharge capacity test on the storage battery pack by adopting a storage battery discharge test instrument; carrying out checking discharge by adopting a 10-hour rate discharge current to discharging for 5 hours; when the discharge time reaches 5 hours, and the voltage of any battery end is not smaller than 1.95V, stopping the discharge test and restoring the charge to the storage battery pack; otherwise, carrying out deep activation according to a relevant standard specification, repeating the test twice and confirming whether the residual capacity of the storage battery pack is not smaller than 80 percent C10 or not. The method is simple, visual and effective and can ensure that the power supply of the tested storage battery pack on equipment is not interrupted in the whole process of the test.

Description

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Claims

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Application Information

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Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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