Lead-acid battery failure mode

1. The performance of the thermal runaway and its harmfulness

Valve control type sealed lead acid battery, if you use improper maintenance, so there will be a kind of critical state during charging, the charging current and temperature of a cumulative mutually reinforcing effect, make the slot deformation \"drum belly\", lead to the battery failure.

The end of the battery, voltage rise rapidly, charging a large part of the electrical energy into heat energy, causing the battery temperature rise.Combined with the AGM type sealed lead acid battery is tight assembly, internal heat is difficult, can also lead to the battery temperature.Gel battery good heat dissipation, general won't appear thermal runaway phenomenon.

2. High voltage capacity is insufficient

Lead-acid battery voltage only with liquid layer near the surface of the electrode reaction - H2SO4 in the activity, and has nothing to do with the amount of electrolyte in the battery.After filtration, battery electrolyte concentration (live) degree rise, higher open circuit voltage of battery, of course;But can take part in the reaction of the amount of electrolyte is reduced, the discharge capacity is insufficient.

3. The battery voltage drops quickly during storage

This is mainly due to the battery self-discharge consumes part - H2SO4, reduce the electrolyte concentration (live) degree.In addition, if the battery seal valve failure, make it the oxygen in air to enter the cell, shao yao it produced in the cathode depolarization reaction, make the cathode potential is moved, open circuit voltage decreases.

4. The battery leakage

Around the very beside the column or valve battery can appear sometimes climb acid phenomenon.Draw out the reasons for this phenomenon:

(1) the battery level is low, to design and manufacture of sealing measures were in place.

(2) seal valve failure or open the valve pressure is too low, it will lose seal valve block the effect of acid fog, it is easy to precipitate with battery acid mist ran out of gas.

(3) the battery voltage is too high.Battery analysis gas velocity with charging voltage increases exponentially.The battery voltage is too high, gas evolution rate will be increased, the greater the gas pressure will be, the result will be acid mist out of battery.

(4) the amount of electrolyte and too much.