Basic tips of The Lead Acid battery
The lead acid battery was invented by Gaston Plante’ – the French physician in 1859. It was the first rechargeable battery that was be used for commercial purpose. And today, the flooded lead acid battery is popularly used in automobiles, large power suppler system and forklifts.
- In years of the mid 1970s, researchers developed a maintenance free lead acid battery that operated in any position. This worked based on that the liquid electrolyte was transformed to separators and the enclosure was sealed. This way was added to allow venting of gas during charge or discharge, for safety valves. And when the lead acid battery was released, people gradually changed their tool to it.
- There are two battery designations through different applications, named the small sealed lead acid (SLA) that is known as the name Gelcell and the large valve regulated lead acid (VRLA). In the technical side, they are the same because not lead acid battery can be totally sealed.
- Different from the flooded lead acid battery, these two batteries are designed based on a low over-voltage potential to prevent the battery from reaching gas-generating potential during charge process. More importantly, the excess charging will cause gassing and water depletion. As the result, they can never be charged to their full capacity.
- The charge times of the SLA are from 8 to 16 hours, not fast charging. This type of battery must always be stored in a state of charge. When you leave it in a discharge condition, it can cause sulfation that makes the battery difficult or even impossible to recharge.
- Also, unlike the NiCd, the lead acid battery does like deep cycling. Therefore, a full discharge causes extra strain and a small amount of battery’s capacity is robbed by each cycle. This is a wear-down style that applies to other battery chemistries. To prohibit the battery from stress through repeated deep discharge, a larger SLA will be your solution.
- The discharge or charge cycles depend on the depth of discharge and operating temperature. The normal number is around 200 to 300 discharge/charge cycle with a SLA. The main reason explaining this issue is grid corrosion of the positive electrode, expansion of the positive plates and depletion of the active material. When there have changes of them, they are most prevalent at higher operation temperature and then cycle does not reverse the trend of the process.
- In comparison rechargeable batteries, the lead acid battery family has a lower energy density, leading the unsuitable ability to handling devices which require the compact size. Besides, a dis-advantage of this type is the performance at low temperatures is not high.
- The SLA is properly rated at 5-hour discharge or 0.2C while some other types are at a slow 20-hour discharge. This will make longer discharge time and give us a higher capacity reading. They perform well on high pulse currents and during these pulses, discharge rates well in excess of 1C can be down.
Each type of battery has its own advantages and the Lead acid battery is the same. It cannot be popularly used for small devices but in may machines or means that require strong energy system, lead-acid batteries will be your ideal result.