JasonA
Well-known member
I believe you are actually seeing two effects.
First, the battery is an electro-chemical device. Lower temperatures actually cause a slow down in the chemical to electrical conversion process within the battery. When batteries are cold they can give the appearance of a high internal resistance because of the slower ability to convert chemical energy into electrical energy. So most types will show higher IR.. no way to get around this except fancy Nissan gimmicky programming... it just happens..
On the other side of the equation, heat has a different effect. Heat will typically increase the internal resistance of a battery therefore limiting the current the battery can provide. If you continue raising the temperature of the battery the chemical process works better however the higher resistance limits the current the battery can supply. This is NOT "C" rating..
Ideally, you want to use the battery in it's sweet spot or recommended operating temperature, not too cold or not too hot. Also the reason you should let your batteries cool down after you use them prior to recharging. This is also why on very cold days, a battery will actually start to perform better as you drive because the heat created from the discharge process warms up the chemicals and the conversion process improves.
I've noticed now on mine that the sweet spot is 22-28*c and they are kicking!
I hope that makes sense....
First, the battery is an electro-chemical device. Lower temperatures actually cause a slow down in the chemical to electrical conversion process within the battery. When batteries are cold they can give the appearance of a high internal resistance because of the slower ability to convert chemical energy into electrical energy. So most types will show higher IR.. no way to get around this except fancy Nissan gimmicky programming... it just happens..
On the other side of the equation, heat has a different effect. Heat will typically increase the internal resistance of a battery therefore limiting the current the battery can provide. If you continue raising the temperature of the battery the chemical process works better however the higher resistance limits the current the battery can supply. This is NOT "C" rating..
Ideally, you want to use the battery in it's sweet spot or recommended operating temperature, not too cold or not too hot. Also the reason you should let your batteries cool down after you use them prior to recharging. This is also why on very cold days, a battery will actually start to perform better as you drive because the heat created from the discharge process warms up the chemicals and the conversion process improves.
I've noticed now on mine that the sweet spot is 22-28*c and they are kicking!
I hope that makes sense....