Lead acid batteries

Lead-acid battery

The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It is the first kind of rechargeable battery created. Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, their ability to supply high surge currents means that the cells have a relatively large power-to-weight ratio. These features, along with their low cost, make them attractive for use in motor vehicles to provide the high current required by starter motors. Lead-acid batteries suffer from relatively short cycle lifespan (usually less than 500 deep cycles) and overall lifespan (due to the “double sulfation” in the discharged state).

Gel-cells and absorbed glass-mat batteries are common in these roles, collectively known as VRLA (valve-regulated lead–acid) batteries.

In the charged state, the chemical energy of the battery is stored in the potential difference between metallic lead at the negative side and PbO₂ on the positive side. It contains the positive side PbO2 and negtive metallic lead, insulation board, plastic case, sulfuric acid and water.

When discharge, the positive electrode reaction: bO2 + 4H+ + SO42- + 2e- = PbSO4 + 2H2O

Negtive reaction: Pb + SO42- - 2e- = PbSO4

Overall reaction: PbO2 + Pb + 2H2SO4 === 2PbSO4 + 2H2O (The rightward reaction is discharge, the leaftward reaction is charging).

Waste lead-acid batteries (WLABs) are used lead-acid batteries that need to be disposed of. 

Amongst the different usages of WLABs, the major application remains to be in automobiles, while application in UPS uninterruptible power supply  is an emerging trend due to the growth in the telecommunication and Information Technology sectors (especially the data centres). With the increasing number of data centres, it is expected that WLABs arising from this sector will continue to increase in the coming years.

We could offer a complete lead acid batteries recycling line, including the breaking and separation system, furnace system, refining system, and tail gas filtering system, etc. 

More information, please feel free to contact us.

Regards,
Aileen