What do I need to know about the specific gravity measurement of a forklift or traction battery?
DETERMINING THE STATE OF CHARGE OF THE BATTERY Dilution of the electrolyte during discharge and re-concentration during charge is a useful guide to the state of charge of a lead acid cell. The less acid there is in the electrolyte, the less dense it is, and the lower its specific gravity (S.G.). One cubic centimetre of water has a mass of 1 gram. In other words, its density is 1 gram per cm 3 at 4°C . Specific gravity is the ratio of the density of the substance measured to the density of water. Density of water at 4°C = 1.000 g/cm 3 but only decreases slowly as temperature increases. The specific gravity of water is therefore usually expressed as 1.000. Specific gravity could also be expressed as the mass of the liquid divided by the mass of an equal volume of water. Specific gravities are usually measured with a hydrometer. This works on the principle that a float will sink further into a liquid of low specific gravity than of high specific gravity because the latter is denser and pr
Related Questions
- Why is the electrolyte specific gravity in the DYNASTY VRLA battery (1.300) higher than that used in an automotive (SLI) battery (approximately 1.260)?
- What actually happens during the charge cycle of the forklift battery or traction battery?
- What are the fundamental principles of a traction battery or forklift battery?
