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Charging Batteries/Cells

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hohmies dotcom

on 5 May 2014

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Transcript of Charging Batteries/Cells

Charging Batteries/Cells
Lithium Battery (primary cell)
High charge density
Long life
Range 1.5-3.7V
Is the capacity of the battery.
The ampere hour capacity is related to the number and area of the electrodes
ie a 7Ah battery is designed to deliver 7 Amperes continuously for one hour or 0.7 Amperes continuously for 10 hours
Nickel-Cadmium Battery
Need to be slow charged for 16-24 hours before first use-brings all cells to an equal charge level.
Nickel Cadmium Batterys are very robust and can tolerate abuse (overcharge, over-discharge, short-circuiting and thermal shock)
Lead-Acid Battery
Dissipates very little energy.
To recharge a lead acid battery you need a rectifier to convert from AC to DC.
Capable of high discharge rates
Self Discharge Characteristics
The self discharge rate is a measure of how quickly a cell will lose its energy doing nothing
The rate depends on the cells chemistry and temperature
Lithium Ion (secondary cell)
Moves from cathode to anode in charging state. Opposite when discharging
Charge stages of lead acid battery
Full transcript