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8 Cards in this Set
- Front
- Back
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Primary Cells |
Primary Cells cannot be recharged, and after the cell is spent, it is discarded. |
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Secondary cells |
A secondary cell can be recharged, because the chemical action inside it is reversed, when a charging current is passed through it. |
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What is a dry cell? |
It is a cell which has a moist electrolyte or paste. Allowing I to be used in any physical position. |
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What is a wet cell? |
It is a cell which has a liquid electrolyte, which will spill if the cell is turned upside down. |
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How can secondary cells be charged? |
By passing an electric current from some other source, through the cell in the opposite direction to that of discharge. |
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Secondary battery groups |
- Lead Acid - Alkaline |
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Parts of a battery |
- Terminals (Are the current carriers for the cell) - Electrolyte solution (reacts with the electrodes, to produce an EMF) - Protective Casing (protects the internals, provides mountings for electrodes) - Separators (prevents electrode contact, whilst allowing free flow of the electrolyte) - Vent Caps ( Allows hydrogen gases produced during charging to escape) - Cell Connectors (Connects cell together in series, to provide voltage to the terminals) |
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Maintenance of batteries |
- Ensure terminals are clean and give good contact - Ensure connecting terminals are of a suitable material - Keep case clean of electrolyte - Keep electrolyte level topped up - Protect battery from excessive temperature and physical damage - Only charge batteries at design levels, at not charged and discharged at high currents |
