What are the hazards of starting Panasonic batteries when they are out of power?
Fault Analysis and Inspection
The car uses maintenance-free Panasonic batteries. For the above faults, it was suspected at first that the low output voltage and insufficient charge of the generator were the causes. The DC voltmeter is connected in parallel between the generator output terminal and the iron-lapping terminal to increase the speed of the generator. The voltmeter indicates 14.5V (normal); the voltage of Panasonic battery terminal is measured again, and the value is the same. This shows that the charging voltage is normal and the fault is in Panasonic battery.
The DC ammeter is connected in series between the generator and Panasonic battery, and the charging current is still very small when the speed is increased. This shows that the internal resistance of Panasonic battery increases, resulting in a decrease in charging current, resulting in a power shortage of Panasonic battery. Unloading Panasonic battery inspection found that the level of electrolyte in the shell dropped too much. Although the Panasonic battery is fully sealed and maintenance-free, it is unavoidable to escape after water is decomposed into gas in use. Over time, the decline of liquid level is serious, which also affects Panasonic battery capacity, increases internal resistance, and makes charging performance worse, resulting in power loss.
In this regard, distilled water should be supplemented. The method is to open two small caps in the upper cap (one cap for each three cells) and add distilled water so that the electrolyte of each cell can reach the standard level line; charge with charging equipment at 3.9a current until the voltage reaches about 14v; halve the current to 16.5v, then discharge continuously at 3.9a current; stop discharging when the voltage drops to 10.5v; and then recharge repeatedly. After three cycles, fully charged and loaded, Panasonic battery performance returned to normal and failure disappeared.
Panasonic batteries occasionally lose power on the batteries in the end have no impact, presumably many customers have been struggling with this problem, there are Panasonic battery technicians for you to sum up the consequences of Panasonic battery loss.
The positive and negative active substances of Panasonic batteries are gradually converted into PBSO4 with high resistance during discharge, and the sulfuric acid in electrolyte is consumed, and the internal resistance is gradually increased. Therefore, a large amount of heat will be generated during overdischarge, especially at high current, and the amount of sulfuric acid in Tangshallow batteries is very small, the concentration of sulfuric acid decreases very low during overdischarge, and the solubility of PBSO4 increases greatly. Therefore, it is easy to form a thick and hard PBSO4 crystal on the plate, that is, "irreversible sulfation" greatly weakens the battery's charging acceptance ability, which is particularly harmful.
Panasonic batteries occasionally run out of electricity for a day will not lead to the so-called irreversible sulfation of the plates. It is enough to replenish the electricity in time.
According to Panasonic technicians'experience, under normal temperature conditions, as long as the power deficit does not exceed one month, the salt plates can also be reversed by special charging and discharging methods. However, it is suggested that Panasonic batteries should not be depleted in order to avoid unnecessary losses.