12-17-2019, 11:35 AM
As Lithium batteries have lower internal resistance than lead acid batteries I’d be hesitant to connect a discharged pack to a charged pack directly with a battery switch like the . I’m not sure how high the current flow would get??
Is your idea to have one pack charging but disconnected from the loads while the other one supplies the loads?? Ive thought about that strategy of rotating battery packs. One could be on a cart that is wheeled around camp or worksite. There’s lots of possibilities.
This brings up the idea to connect packs with a DC to DC charger. Or a RC charger discharger. Ive been wanting a icharger 4010 duo for a while to play around with Lithium packs.
The resistance of 3-4 feet in 4/0 cable is negligible. Even at high amperage and low voltage. Over 6 feet it becomes more of a issue. But balancing the cables is important. Especially with lead acid or lithium without any balancing circuit. With active balancing on Lithium packs balancing the cables might not be so important.
I’m no engineer but what you have in mind might work.
Is your idea to have one pack charging but disconnected from the loads while the other one supplies the loads?? Ive thought about that strategy of rotating battery packs. One could be on a cart that is wheeled around camp or worksite. There’s lots of possibilities.
This brings up the idea to connect packs with a DC to DC charger. Or a RC charger discharger. Ive been wanting a icharger 4010 duo for a while to play around with Lithium packs.
The resistance of 3-4 feet in 4/0 cable is negligible. Even at high amperage and low voltage. Over 6 feet it becomes more of a issue. But balancing the cables is important. Especially with lead acid or lithium without any balancing circuit. With active balancing on Lithium packs balancing the cables might not be so important.
I’m no engineer but what you have in mind might work.
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