Hi,
I have an older 10S Li-Ion pack, and a new 12S LiFePO4 battery that I'm currently using 1 at a time on an ebike. Both are 36V nominally, but the LiFePO4 battery has a higher voltage throughout its discharge cycle, and a larger capacity (about 12 amp-hours vs. 8 amp-hours).
That said, I'd like to use them in parallel - less voltage sag, and less hassle.
If I connect them with a diode on the positive (red) wire, positive end connected to the Li-Ion pack, will that work? I'll disconnect them to charge, and then only connect them when both are fully charged. The LiFePO4 should have a higher voltage pretty much all the time, and my reasoning is that all I need to do is make sure that it doesn't discharge into the li-ion battery.
The LiFePO4 can take a pretty serious charge current (1C at least). The Li-Ion not so much - maybe 6 amps?
Let me know what you think, and what diode in particular I should consider. It's an eZee forte bike, with a 25amp controller.
Thanks!
I have an older 10S Li-Ion pack, and a new 12S LiFePO4 battery that I'm currently using 1 at a time on an ebike. Both are 36V nominally, but the LiFePO4 battery has a higher voltage throughout its discharge cycle, and a larger capacity (about 12 amp-hours vs. 8 amp-hours).
That said, I'd like to use them in parallel - less voltage sag, and less hassle.
If I connect them with a diode on the positive (red) wire, positive end connected to the Li-Ion pack, will that work? I'll disconnect them to charge, and then only connect them when both are fully charged. The LiFePO4 should have a higher voltage pretty much all the time, and my reasoning is that all I need to do is make sure that it doesn't discharge into the li-ion battery.
The LiFePO4 can take a pretty serious charge current (1C at least). The Li-Ion not so much - maybe 6 amps?
Let me know what you think, and what diode in particular I should consider. It's an eZee forte bike, with a 25amp controller.
Thanks!