Batteries Flashcards
(10 cards)
State the two types of batteries
- Lead Acid
- Alkaline
State FOUR applications of batteries onboard ship
- Navigation Equipment
- Emergency Generator Starting
- Life Boat Starter
- Emergency Lighting
- Emergency VHF Radio Communications
Describe the maintenance required for batteries
- Cell tops should be clean and dry.
- Terminals should have petroleum jelly applied to avoid corrosion.
- Inspection of cables for wear and tear.
- Voltage on load testing.
LEAD ACID ONLY - Check specific gravity of cells using hydro metre.
- Ensure cells are covered with electrolyte.
Name ONE publication dealing with the storage of ships barrerites
Code of Safe Working Practices for Seamen 2015
List SEVEN precautions that should be taken when working in an area where batteries are stored
- Ventilation
- Risk Assessment
- Correct PPE
- Area must be protected against corrosion
- Tools must be safe and no naked flames
- Jewellery must be removed
- First Aid Kit must be replenished
Explain he meaning of the term Gel Cell
Where the lead acid batteries electrolyte is mixed with a silica based gelling agent, turning it thick and immobile.
State how the measure of charge of a conventional lead acid battery is established
Measured using a Hydrometer with the specific gravity, the reading should be 1.280 and terminal voltage of 12.8V
List FOUR advantages of Alkaline batteries
- Longer Lifespan
- Lower Self Discharge Rate
- Better Performance at Extreme Temperatures
- Higher Energy Density
State how the measure of charge of an Alkaline Battery is established
Measured using a Multimetre to measure voltage, 1.4V or 1.2V underload. Discharging under controlled conditions to measure energy retention.
Outline the dangers associated with Lithium Ion batteries
- Fire and Explosion Risk
- Toxic Gases Release
- Short Circuit Hazards
- Capacity Degradation
