For the aeroplane starter system and unplugged ground power (and in some newer aeroplanes for a form of battery APU), as backups to ensure continued operation in the event of power interruption, and in a few cases as the primary power source. Once upon a time, this was something like “lead-acid” – the sort of batteries you learned about in school, with lead and lead oxide anode and cathode, sat in a container of liquid or gel (usually sulphuric) acid. One unit of that was a “cell”, and groups of them joined together became a “battery”. By controlling the arrangements of cells within a battery, we could control voltage, and to a fair extent current. By using an acid gel, we could make the battery able to be used in an aircraft (or other applications such as a motorcycle) without spraying acid all over the place. To recharge the battery, you connected an external direct current source the other way around and the chemical balance would be restored.
This story is from the February 2020 edition of Global Aviator.
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This story is from the February 2020 edition of Global Aviator.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
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