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Online storage battery capacity estimation method

A storage battery and capacity technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems that the internal resistance test tool cannot test the internal resistance change well and affect the accuracy of the test results, etc., to achieve the test process and The calculation process is simple and fast, the judgment process is simple and fast, and the effect of eliminating interference

Active Publication Date: 2013-06-26
CHINA MOBILE GROUP ANHUI
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Problems solved by technology

The operation of the whole method is very simple, and the time-consuming is relatively short. However, since the current value in the battery is relatively high during floating charging, and the internal resistance of the lead-acid battery changes very little when the capacity is in the range of 50% to 100%, the common The internal resistance test tool cannot test the internal resistance change in this range well, so the existence of floating current will seriously affect the accuracy of the test results, so this online test method cannot meet the actual requirements

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Embodiment Construction

[0026] The preferred specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments. Considering that general communication base stations use lead-acid batteries as backup power sources, in this embodiment, the "battery" mentioned refers to lead-acid batteries. However, it should be understood that the technical solutions disclosed in this embodiment are not limited to Only limited to this, it is also applicable to other storage batteries with similar electrochemical characteristics.

[0027] A method for estimating battery capacity online, such as figure 1 shown, including the following steps:

[0028] 1) Use the DC loading method to detect the internal current of the battery twice, and calculate the internal resistance of the battery;

[0029] 2) Use the online measurement method to detect ...

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Abstract

The invention discloses an online storage battery capacity estimation method. The method includes following steps: 1), detecting current in a storage battery by a direct-current loading method for two times, and calculating internal resistance of the storage battery; 2), detecting electromotive force of the storage battery by an online measuring method; 3), detecting equivalent circuit resistance between a positive plate and a negative plate of the storage battery by an alternating-current method for two times; 4), calculating capacitance between the plates of the storage battery according to detection results of the step 3); and 5), estimating capacity of the storage battery according to results about the internal resistance, the electromotive force and the capacitance between the plates of the storage battery obtained from step 1) to step 4). By the online storage battery capacity estimation method, online storage battery capacity estimation can be quickly and accurately realized without disconnecting a storage battery with a floating circuit.

Description

technical field [0001] The invention relates to a method for estimating the capacity of a storage battery online, in particular to a method for estimating the capacity of a storage battery through online testing of electromotive force, internal resistance and capacitance. Background technique [0002] The current communication base stations generally use lead-acid batteries as backup power sources. These lead-acid batteries are in a floating charge state during normal operation, that is, the battery pack is connected to the load circuit in parallel with the power line. Under normal operating conditions, the charging device connected to the DC bus not only supplies power to conventional loads, but also provides charging current to the battery pack. Once a power outage occurs at the communication base station, the battery will continue to supply power. Sufficient battery capacity is an important indicator as a backup power supply. Because the physical and chemical characteris...

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Application Information

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IPC IPC(8): G01R31/36
Inventor 李永宁姜飞李坤滋宋立芳许文影杨庆
Owner CHINA MOBILE GROUP ANHUI
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