Method for detecting defects of positive grid of flooded tubular lead-acid storage battery
A lead-acid battery and front plate technology is applied in the field of detecting the defects of the front grid of the flooded tubular lead-acid battery, which can solve the problems of enlarged defects, deep corrosion, shortening the service life of the battery, etc., and achieves the effect of assisting the improvement of the casting process
Active Publication Date: 2020-12-01
ZIBO TORCH ENERGY
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Problems solved by technology
The reasons for the analysis are as follows: most of the fractured position of the upper beam is at the section of the gate of the grid, and the production method of the positive grid is die-casting, which is prone to defects such as blisters, pores, and micro-cracks inside, and the pressure of the cutter during the cutting process It is easy to cause microscopic damage to the cut-off of the gate. With the charge and discharge cycle, the huge stress generated by the volume change of the active material will cause the defect to gradually become larger, and the corrosion will deepen, and finally the beam will break, which will greatly shorten the service life of the battery.
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Embodiment 1
[0028]Such asfigure 1 As shown, the described method for detecting defects in the positive grid of a flooded tubular lead-acid battery is to manufacture a tubular positive plate from a DB70 tubular positive grid sample according to a conventional process, and assemble the 6 positive plate with the corresponding negative plate. 7 Lead-acid batteries with negative structure and model 6DB420 are to be inspected after formation;
[0029]Phase I cycle: the electrolyte density is adjusted to 1.32g / cm3, The temperature of the constant temperature water bath is controlled at 60℃, after standing for 5 hours, discharge at a constant current of 63A for 2 hours, and then charge at a constant voltage of 2.5V with a current limit of 147A for 1.5 hours, and cycle 30 times.
[0030]After the end of stage I, the electrolyte density remains unchanged, adjust the temperature of the constant temperature water bath to 65℃ to enter the stage II cycle: discharge at 126A constant current for 2.5h, then charge at...
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Abstract
The invention discloses a method for detecting defects of a positive grid of a flooded tubular lead-acid storage battery and belongs to the field of storage battery production. The method comprises the following steps of: (1) manufacturing a positive plate by using a grid sample to be tested, and assembling a sample battery; (2) carrying out electrochemical circulation on the sample battery through electrochemical circulation; and (3) after electrochemical circulation, dissecting the sample battery, and checking the position of a defect by adopting a method of bending the upper cross beam of the positive plate in one direction. The defect position and degree of the positive grid can be truly and effectively reflected, the improvement of a die-casting process is guided, and a basis is provided for solving the problem of fracture of the upper cross beam of the positive plate of the flooded type lead-acid storage battery.
Description
Technical field[0001]The invention provides a method for detecting defects in the positive grid of a flooded tube type lead-acid battery, which belongs to the field of battery production.Background technique[0002]The fracture of the upper beam of the positive plate of the rich liquid tubular lead-acid battery returned to the factory due to its quality is more prominent. The reason for the analysis is: most of the position where the upper crossbeam is broken is at the cut surface of the grid gate, and the production method of the positive grid is die-casting. There are defects such as sand holes, pores, and micro cracks inside, and the pressure of the cutter during the cutting It is easy to cause microscopic damage to the gate cutoff. With the charge and discharge cycle, the huge stress generated by the volume change of the active material causes the defects to become larger and the corrosion deepens, and finally the beam breaks greatly shortens the service life of the battery.Summar...
Claims
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IPC IPC(8): G01N27/26H01M4/73
CPCG01N27/26H01M4/73Y02E60/10
Inventor 单颖会林双吴涛战祥连赵艳红陈龙霞靳树峰
Owner ZIBO TORCH ENERGY