Quote:
Originally Posted by Daox
Shouldn't be too massively hard to create a circuit to check the temperature of the pack, and if so activate a relay to power the charger and enable it to charge. If it doesn't pass the temperature check, it activates another relay to a heating pad of some sort to heat the pack up above freezing.
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I was thinking along those lines for a LiFePO4 12V battery replacement.
Have diodes block the charging.
Bridge the diodes by a relay to power the pad when it is engaged and short the diodes when it is not.
Engage the relay when the temperature is below the threshold.
There are thermostat switches that can do that; these come in any temperature range.
One from an old fridge would be in range and adjustable too. Problem is they engage when it gets warmer, we want it the other way round.
My 12V battery is deteriorating. When I key on (and not start the engine yet) it drops below 11 Volt quite fast. Time is running out
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