Li Gong, please ask the question, thank you for your answer, a 10A discharge has 15 minutes of 20Ah battery, the use of pulse repair instrument to repair, after a day of repair, the discharge drops to only 13 minutes, but the voltage is 1V higher than normal;
A 5Ah battery with a 33-minute discharge was repaired using a pulse repair instrument, and after a day of repair, the discharge was raised to 36 minutes, but the voltage dropped by 0At 5V, the charge is never satisfied, resulting in thermal runaway. Can you help me see what the reason is?Thank you very much.
A: I said that repairing the battery is symptomatic, not a blind direct pulse. In addition, the questions are not detailed enough, such as have you added water?
Voltage refers to the first voltage or the terminal voltage when fully chargedHow many volts?Do you add a pulse after a full charge?
I have to judge that the first battery is seriously backward in the single compartment, and the increase in end pressure is due to the effect of devulcanization on the healthy grid, so that their vulcanization is reduced, thereby increasing the specific gravity of the electrolyte and increasing the end pressure.
The battery has no capacity caused by the backward lattice, and its failure is caused by continuous overdischarge, and the desulfurization is ineffective, (you can try a small constant current for a long time, which may form pores on the softened plates to temporarily improve the softening).
The voltage of the second block is below 12 volts, and the obvious short circuit of the lead branch cannot be repaired.
I think the second piece (which should be a lean liquid battery) is a long-term impulse that causes the battery to be severely vulcanized, and the precipitated lead sulfate is dispersed in the middle of the separator, and the lead sulfate is reduced to lead through your pulse deflow
The formation of lead branches in the separator causes a short circuit, and you can try to fuse it with a high current charge.
If you really want to prove it, you can try to disassemble and verify, note that it is not for everyone to disassemble the battery for repair, but to verify the fault. Heat up the saw blade and gently disassemble it and compare it one by one.
Note that observe the structure of the battery when dismantling, and divide the battery into four parts: shell, negative electrode group, positive electrode group, and separator. After dismantling, the negative electrode group should be rinsed with water many times, then spun dry, and dried quickly.
For comparison, the partition should be very careful when dismantling. Compare all the cells and you'll find the problem. Concentrate.
If you do this once, I believe you will gain a lot.