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Storage battery fault prediction method and system

A fault prediction, battery technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as affecting equipment reliability, inability to predict battery operation trends, consuming manpower and time, and human measurement errors.

Pending Publication Date: 2022-06-24
HUANENG LANCANG RIVER HYDROPOWER
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Problems solved by technology

[0005] 1. When the DC system equipment is overhauled, the battery is isolated, and the maintenance personnel untie the connecting wires of each battery one by one, and then use a special instrument to measure the internal resistance of each battery one by one. There are factors such as manpower and time consumption, and human measurement errors, and Maintenance of batteries may affect the reliability of equipment operation;
[0006] 2. The internal resistance of the battery is monitored in real time through the online monitoring system, and the internal resistance of the battery is measured regularly by the DC method, and an alarm signal is sent out according to the preset value; the above two methods can only know the fault information after the battery fails , it is impossible to predict the running trend of the battery

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  • Storage battery fault prediction method and system
  • Storage battery fault prediction method and system
  • Storage battery fault prediction method and system

Examples

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specific example

[0099] This example takes the operation of the second battery of units 1 and 2 of a power plant as an example, and obtains the internal resistance value of two adjacent measurements of a single battery in the battery group. Check as follows:

[0100] Step (1) Set δ 设 is the battery pack dispersion, R 1b is the predicted value of the internal resistance fault of a single battery, R 2b is the predicted value of the average internal resistance fault of the battery pack, D 1 Indicates the predicted number of months for serious fault alarms, D 2 Indicates the number of months before the slight abnormality alarm:

[0101] δ 设 =15, R 1b =455, R 2b =420, D 1 =1, D 2 =3.

[0102] Step (2) Obtain the internal resistance value R of a single battery in the battery pack measured in two adjacent months through the existing resistance load module, battery management module and voltage equalization module of the DC system battery and the computer connected thereto i , R i ', as sh...

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Abstract

The invention provides a storage battery fault prediction method and system, and the method detects the fault of a storage battery pack in real time based on the internal resistance change of the storage battery, and judges whether the fault exists in the storage battery pack or not through the detection of the change trend and change rate of the internal resistance of the storage battery, so as to make processing measures in advance, and improve the operation reliability of equipment.

Description

technical field [0001] The invention belongs to the technical field of battery fault detection, and in particular relates to a battery fault prediction method and system. Background technique [0002] Valve-regulated lead-acid batteries are widely used in power systems for their advantages of no acid mist gas discharge, no need to add water, and high power density. They play a very important role as backup power for many equipment in power plants and substations. [0003] The internal resistance of the battery comes from the polarization reaction inside the battery. It cannot be used to directly represent the remaining capacity of the battery, but it can be used as a signal to indicate whether the battery is in good or bad condition. The increase in avoidance can be detected according to the change of internal resistance. However, due to the sealing characteristics of VRLA batteries, it is often impossible to predict the latent failure of the battery before the battery fails...

Claims

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Application Information

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IPC IPC(8): G01R31/367G01R31/389
CPCG01R31/367G01R31/389
Inventor 董智磊查荣瑞李政徐剑李和良杨康吕通张正宇李万俊李东双熊新宇郑霜吴繁
Owner HUANENG LANCANG RIVER HYDROPOWER
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