hmp008 Posted April 5, 2019 Share Posted April 5, 2019 Kann man sowas mit einem DC-DC Konvertor realisieren?? Link to comment Share on other sites More sharing options...
Chriull Posted April 5, 2019 Share Posted April 5, 2019 Yes - but you should look for a DC/DC converter providing some (adjustable) max constant current in the range of 0.5-1C of the cells in your pack. I.e. if there are 4 cells with 3500mAh in parallel the charging current has to be limited to something below 0.5 ... 1 x (3.5*4) = 7 ... 14A. Additionally most connectors / wirings are just designed for 5A! So you should choose an DC/DC converter with some current limiting below 5A. Next thing is that your GW could easily have more battery capacity than your cars battery - so the cars battery is empty and not too much happened with your battery pack... For changing the direction, loading the car battery from the GW battery pack you'd need another converter bringing the voltage down. But i don't know the charging requirements for car batteries - there maybe also some current limiting (constant current phase while charging is needed?). If your GW has some charger plug protection (reverse polarity protection diode) you have to open the wheel and use the discharge site for charging the cars battery. But there you have _no_ current limitation/protection! So you should use some fuse/etc to never ever shorten/overload the cells! PS.: Imo there was some quite similar topic here not too long ago? Link to comment Share on other sites More sharing options...
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