On 6/18/2013 3:10 PM, [email protected] wrote:
Hello Bill
If the state of charge is the same.
Where did the energy come from that heats up some cells more then others.
You added an equal amount of current to each cell in series.
The cells with higher resistance are warmer and heat takes energy.
If anyone knows how to get heat without using energy.
Please let me know as I would like to heat my work shop.
Imagine two cells in series.. one cell (A) with a constant 1 ohm
internal resistance, the other cell (B) with no internal resistance.
Charge the pack at 1 Amp for 1 hour. A meter across cell A will show
1 volt higher than a meter across cell B.
Now discharge the pack at 1 Amp for 1 hour. The meter on cell A will
show 1 Volt lower than the meter on cell B.
Both cells will still take in 1 Amp-hour and deliver 1 Amp-hour.
Cell A will lose 1 Watt-hour on charge, and lose 1 Watt-hour on
discharge.
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