| FailureType | Battery Part | Factor of Failure | Appearance |
Check Method |
| OverCharge | Battery all cell | 1)To charge Alternator with high voltage 2)Handling negligence (recharging error) |
1)Electrolyte Overflow 2)Indicater color: RED- Exhaustion of electrolyte- Etc |
1)Indicater color : RED 2)Electrolyte Color : Black ,etc |
| Over Discharge | Battery all cell | 1)Electric part trouble 2)User discharge (light) 3)Generator, fan belt 4)Long period stop |
1)Not Starting 2)Electric equipment ability weak |
1)All cell specific gravity : 1.220/25? ? 2)OCV 12.30V ? 3)Generater vs battery voltage difference : 0.2-0.3V |
| Short | Special cell | Short | 1)Not Starting 2)Ability loss of electric equipment |
1)Specific gravity : low above 0.05 than different cell 2)When discharge, gassing is not in the special cell 3)When charging, gassing is not and S.G is changed in the special cell |
| Electrolyte leakage | Sealing part case, etc | 1)Heat sealing failure 2)Damage |
Electrolyte leakage | |
| Explosion | Exhaust hole | 1)Handling negligence - Flammable - Pole short |
- Pole short Battery explosion |
What is Battery?
Battery is an electrical device which converts electrical energy into chemical energy and preserves it and then takes it out as electrical energy and uses it as necessary ; the difference from primary battery (e.g. manganese battery) is that the reaction is reversible. At this time, the work of taking out electrical energy from battery is called electric discharge and? the work of putting electrical energy into battery as chemical energy is called electric charging.
Why batteries are used for forklift?
Because the clad type lead-acid batteries have following advantages compared to other electrical devices.
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It is cordless power source.
It has a big advantage of supplying great power to the place without power cable, wiring, etc.
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It is pure DC power.
It supplies good power for thyristor circuit or motor circuit which is used for speed regulation.
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It has high performance and long life.
It maintains high performance for long hours and its components endure vibration and shock sufficiently, so it can be used without anxiety.
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It is noiseless safe power source.
It is a power source for preventing pollution, which does not generate vibration, noise, harmful gas flame, etc.
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It is economical and easy to handle.
It can be maintained and controlled sufficiently by person who handle it for the first time, and it has no trouble for long time its consumables are only the refined water which? is contained in electrolyte.
What is Battery?
Battery consists of positive plate and negative plate to store electrical energy, separator to prevent short circuit in both electric plates, electrolyte to be electric conductor and acting part, container of special plastic material to contain these, cover, pole to be entrance of electrical energy, other accessories, etc.
(1) Positive plate: Tube is inserted into the core metal of lead-alloy grid, active material (lead (II) carbonate hydroxide) is charged between the tube and core metal, but the bottom side of tube is blocked by sealer in order to prevent active material from being removed. This electric plate is called a clad type positive plate, which exerts long lifespan and high performance.