As the titles says: how comes the bbs02v2 (750W, upgraded fets) comes with 16 awg power wires ? Depdending on external conditions, those can get quite hot when pushing 18 to 20amps. Sounds silly to waste energy just because the wire gauge is too narrow. Is it recommended to hack the controller with larger - say 12 awg wires ?
quick bbs02v2 question: 16 awg power wires ?
- Thread starter qwerkus
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Chalo
100 TW
Resistance is a function of wire cross-section and length. I don't think very much heat will be generated (or energy lost) in the short piece of 16ga wire. Consider that the power traces and FET legs on our controller and BMS circuit boards are much smaller yet. They don't incur much loss because their conductive paths are short.
Where you have longer wire runs, it's a good idea to use heavier wire, and to minimize the number of plugs in between battery, controller, and motor.
Where you have longer wire runs, it's a good idea to use heavier wire, and to minimize the number of plugs in between battery, controller, and motor.
Chalo said:
Ok, makes sense. The end of the power cable goes to the potted controller - so either you have to remove some of the potting, or you're stuck with 16 awg. Going to cut it to 20cm though, with an xt60 connector (love them, because any shock pulls them apart with no dammage), and use some 12 Awg on the other side, 60cm to the battery pack.
You already know the battery voltage and nominal current. You can look up the resistance of a segment 16ga wire on google which is a function of conductor (probably copper) and the length. Then a calculator for "power dissipation in resistors" can show the answer in a couple clicks. You're probably not losing very much or you will have other issues like things melting.
