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A 2v valve-regulated lead-acid battery plate sulfation detection method

A lead-acid storage battery, sulfation technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of low solubility and dissolution speed, no obvious and effective method or instrument for sulfation degree, difficult to convert lead sulfate and other problems, to achieve the effect of simple operation and realization of repair possibility evaluation

Active Publication Date: 2020-10-09
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, the short service life and frequent daily maintenance of valve-regulated lead-acid batteries are also its disadvantages that cannot be ignored, especially if the battery is used and maintained improperly, such as often being undercharged or overdischarged. White and hard lead sulfate crystals are formed on the surface, and it is very difficult to convert lead sulfate into active substances during charging, that is, sulfation
This kind of lead sulfate has poor conductivity, high resistance, low solubility and dissolution rate, and difficulty in recovery during charging, which is the cause of reduced capacity and shortened life.
At present, there is no obvious and effective method or instrument for the diagnosis and evaluation of the sulfation degree of the plates of valve-regulated lead-acid batteries.

Method used

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  • A 2v valve-regulated lead-acid battery plate sulfation detection method
  • A 2v valve-regulated lead-acid battery plate sulfation detection method
  • A 2v valve-regulated lead-acid battery plate sulfation detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for detecting sulfation of plate sulfation of 2V valve-regulated lead-acid battery, which is loaded on positive pole 3 and negative pole 6 of 2V valve-regulated lead-acid battery through charge and discharge device 4, and voltage detection device 1 and The reference electrode 2 inserted into the battery electrolyte through the safety valve 5 detects the potential of the battery plate, thereby detecting the sulfation degree of the valve-regulated lead-acid battery plate. It mainly includes the following steps:

[0022] (1) Before the test, the positive pole 3 and the negative pole 6 of the 2V valve-regulated lead-acid battery are loaded with normal charging voltage, and the first constant current [current is I 10 After A, charge in the way of constant voltage, and start to test the electrode potential when it is fully charged, and then I 10 A test electrode potential after discharge for 0.5h, I 10 A Test the electrode potential when the discharge is terminated...

Embodiment 2

[0031] On the basis of Example 1, the detection method of the present invention also includes:

[0032] Check the electrolyte level, if the electrolyte level is lower than the normal state, replenish the liquid through the safety valve until the electrolyte level is in the normal state.

Embodiment 3

[0034] On the basis of Embodiment 1 and Embodiment 2, the detection method of the present invention also includes at least the following potential calibration steps:

[0035] Select a new valve-regulated lead-acid battery of the same model as the test sample battery for positive and negative potential calibration; or select a test sample battery whose capacity is basically the same as the nameplate capacity for positive and negative potential calibration. For example: when the cadmium electrode is used as the reference electrode, the calibration value of the plate potential is shown in Table 1, and if it exceeds this index, it can be considered that the plate is sulfated.

[0036] Table 1 Calibration standard value of plate potential of valve-regulated lead-acid battery (reference electrode: cadmium electrode)

[0037]

[0038]

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PUM

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Abstract

The invention discloses a sulfation detection method of a 2-V valve-regulated lead-acid battery pole plate. A charging-discharging device is used for loading to a positive pole and a negative pole ofa battery. During the charging and discharging processes, with a voltage detecting device and a reference electrode, the electric potential of the battery pole plate is detected; and sulfation evaluation of the battery pole plate is carried out by using the electrode potential value and a potential calibration standard value. Therefore, under the circumstance that the valve-regulated lead-acid battery structure is not damaged, electrode potentials of positive and negative polar plates of the valve-regulated lead-acid battery are tested, thereby realizing evaluation of the sulfation degree andrepairing possibility of the positive and negative polar plates. The method has advantages of simple operation, great rapidness and convenience, and good capability of non-destructive testing.

Description

technical field [0001] The invention relates to the technical field of valve-regulated lead-acid batteries, in particular to a method for detecting sulfation of polar plates of 2V valve-regulated lead-acid batteries. Background technique [0002] With the development of high-tech at home and abroad, valve-regulated lead-acid batteries are widely used in transportation, telecommunications, power stations, stations, underground mines, aerospace and navigation, natural energy systems, banks, schools, and shopping malls due to their stable voltage and low price. Hospitals, computer systems, tourism and entertainment, national defense and military industries and other fields. However, in the actual application process, the short service life and frequent daily maintenance of valve-regulated lead-acid batteries are also its disadvantages that cannot be ignored, especially if the battery is used and maintained improperly, such as often being undercharged or overdischarged. White a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/379G01R31/392G01R31/388G01R31/389
Inventor 丁德吴健苏耀国郭季璞葛春鹏何晓英刘磊平欣欣雒晨
Owner STATE GRID CORP OF CHINA