Lead Acid Battery.pptx

Lead Acid Battery

1. ELECTRICAL TOOLS AND EQUIPMENT PRESENTED BY LEAD ACID BATTERY PRESENTED BY NAME - NOORUL AMIN TRADE – ELECTRICAIN STATE STAFF TRAINING AND RESEARCH CENTRE ALIGANJ LUCKNOW

2. LEAD ACID BATTERY The lead–acid battery is first invented in 1859 by French physicist Gaston Planté. It is also known as Lead Storage Battery. It is an example of secondary cells which are rechargeable. It is used in automobile starting, lighting and ignition. They are used in back-up power supplies for alarm and smaller computer systems and for electric scooters, electric wheelchairs, electrified bicycles, marine applications and electric vehicles.

3. CONSTRUCTION Rectangular ebonite case. Contains H₂SO₄ (5M). Electrodes are made up of Lead. Anode is coated with spongy lead Cathode is coated with lead dioxide (PbO 2 ) & spongy lead (1:1).

4. WORKING At Anode (Oxidation) Pb(s) + SO − 4 ( aq ) PbSO 4 (s) + 2e At Cathode (Reduction) PbO 2 (s) + SO − 4 (aq) + 4H + (aq) + 2e −   PbSO 4 (s) +2H 2 O(l) The total reaction can be written as Pb(s) + PbO 2 (s) + 2SO − 4 (aq) 2PbSO 4 (s) + 2H 2 O(l) Process of Discharging it behaves as Voltic Cell . Process of Charging it behaves as Electrolytic Cell .

5. Measuring the charge level Because the electrolyte takes part in the charge-discharge reaction, this battery has one major advantage over other chemistries: It is relatively simple to determine the state of charge by merely measuring the  specific gravity  of the electrolyte; the specific gravity falls as the battery discharges.

6. Applications These are employed in emergency lightening to provide power for sump pumps. Used in electric motors Submarines Nuclear submarines

7. Thank You