brettcgb
Well-known member
brettcgb said:ICE wisdom says to connect the booster negative (black) to the engine block (not the battery, and never the chassis), and the booster positive (red) to the battery positive. Good advice... if you're cranking an engine and need to handle high current (50A-200A).
In a Leaf, there is likely never any current loads on 12V greater than normal running loads (which the DC-DC converter will pick up in a few seconds). I believe connecting the booster cable negative to either the battery negative or the chassis may really be a "don't care".
planet4ever said:NO! Phil (Ingineer) tells us to never EVER connect directly to the battery negative terminal, and I trust him. It isn't a matter of load, according to him. There are some electronics involved that can get totally screwed up if you connect directly to that terminal.
Well, there is obviously an exception. If you take the battery out of the car, then you can charge it that way. But don't do it while the negative pole of the battery is connected to the car.
Ray
On Sun Nov 06, 2011 11:07 pm (Re: Jumping another vehicle) Ingineer (Phil) writes how to use the Leaf to start an ICE:
"While Nissan doesn't condone it, you should have no issues jumping another car with the LEAF. Be absolutely sure to get the polarity correct, and connect the ground on the LEAF to the DC-DC converter, NOT THE BATTERY (-) TERMINAL!"
Not quite the same as connecting a boost battery to the Leaf's 12V battery to start the Leaf.
I've seen threads describing jump starting Leafs due to low 12V battery, but I'm having trouble finding them....
I'm not up to speed on searches within this web site, and I definitely don't know how to cross-post....