okay so i recently got into electric bicycles. A complete newbie. I know a few things about electricity, but i haven't worked much with batteries. I hooked 4 12v batteries in series to make a 48v battery. Soldered it all together. Made a charging port. Went to hook the battery to the controler and got a pretty descent Spark. Scared me pretty good. IM hoping i didnt mess anything up. Is this normal and what can i do to keep it from sparking? Or pretty much just sparks when doing so.
Sparking when connecting battery to controller
- Thread starter MadMaxed
- Start date
It's normal. It's the surge current that flows into the controller because of the large capacitor that gets charged. You can avoid it by wiring in a "pre-charge resistor of say 500 ohms that you turn on before the main switch.
Yep. that's why I like battery packs that have a key to turn them off. otherwise you just have to plug them in real fast and smooth.
Its called a Pre Charge Resistor.
There are many ways to do it the easiest way is to use Hobbykings anti spark connector.
http://www.hobbyking.com/hobbyking/store/__61690__XT90_S_Anti_Spark_Connector_2pairs_bag_.html
or make your own using a switch as shown here .
https://endless-sphere.com/w/index.php/Precharge_Resistors
There are many ways to do it the easiest way is to use Hobbykings anti spark connector.
http://www.hobbyking.com/hobbyking/store/__61690__XT90_S_Anti_Spark_Connector_2pairs_bag_.html
or make your own using a switch as shown here .
https://endless-sphere.com/w/index.php/Precharge_Resistors
