How about monitoring the temperature of each battery? Temperature sensors/switches are cheap and easy to interface:
http://www.digikey.com/product-detail/en/microchip-technology/TC622VAT/TC622VAT-ND/418685
Thermal characteristics of lead acid is well documented, although historically in terms of battery charging where proper charging needs temperature compensation. Also, much of the information on thermal issues has been in moderate current deep cycle (see the previous cited AmplePower reference). But in electric power vehicles high continuous currents are more of an issue.
Miles' discussion about the problems of fusing was good, and circuit protection must be built into any system. That can get complex, especially in terms of protecting an individual battery. But we seem to be overlooking what can be done by monitoring the temperature of each battery and using that for alarms or system shut down on thermal runaway.
http://www.digikey.com/product-detail/en/microchip-technology/TC622VAT/TC622VAT-ND/418685
Thermal characteristics of lead acid is well documented, although historically in terms of battery charging where proper charging needs temperature compensation. Also, much of the information on thermal issues has been in moderate current deep cycle (see the previous cited AmplePower reference). But in electric power vehicles high continuous currents are more of an issue.
Miles' discussion about the problems of fusing was good, and circuit protection must be built into any system. That can get complex, especially in terms of protecting an individual battery. But we seem to be overlooking what can be done by monitoring the temperature of each battery and using that for alarms or system shut down on thermal runaway.
John Acord
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Posted by: John Acord <jcacord@gmail.com>
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