I have a 12S4P on my Mountainboard. While I can get far enough for a satisfying ride I wouldn’t mind having another extra 1 or 2P’s on demand.
So I was thinking about building a 12S1P or 12S2P Portable Pack that will be used to charge the 12S4P.
So does anyone have experience with some tested circuitry to limit the current properly ?
Maybe I also have to build a 13S1P instead to be able to have enough charging voltage and limit the voltage as well.
Of course it would be better to just build a whole new pack that is 12S6P in the first place but I was just thinking about the on demand solution where I can still have my relatively light weight board when I don’t need the extra Amps and then just carry a portable pack whenever needed.
Anyone thought of a solution to this already ?
A LM317 could be used to limit the current I guess and there are also many voltage regulators available (LM317 can also be used to regulate voltage). However I never built a charging circuit yet (only power supplies)…
So paired with this it would be possible to have an adjustable portable battery pack that can charge the battery pack of my board. I could install two meters (one for current and one for voltage) to monitor everything.
The Bad thing is that the LM317 only is rated for a maximum of around 40V Output
The LM317HV might fit the bill ?
So any ideas guys ?