Esc burning up without warning
 

Running my max 5 1:5 esc on 8s in series. I recently got a new set of 4s lipos and plugged them up for a second run and the whole thing went up in smoke.

i can only imagine it was to much current but idk how when the car didn’t move and I had ran these batteries prior

the only odd symptom the esc gave was it would stop abruptly if I gave it too much throttle to quickly during the beginning of a run and reset it’s self (counting cell count,blinking and what not). This would only happen maybe 6-7 times and after that everything was fine.

anyone ever have an esc go up in smoke without any wrong doing similar to mine?

https://cimg3.ibsrv.net/gimg/www.rct...49e93f369.jpeg
Quite annoyed cause I liked this esc mainly for the size compared to the flat longer xlx

This is the warning, you ignored it!

what could it have been ? It has to had been a short on the esc

Thermal out, maybe he thought lipo were done. installed fresh lipo. That my opinion.

Low rpm with lots of power is difficult on esc’s.

I had only plugged the battery up to the esc when it went up

Sounds like a solder joint overheated and melted, and the loose component was jostled to the side where it caused a short-circuit. Sometimes things are defective. Ask the manufacturer for an exchange.

If it was resetting during high current loads on a previous run, the FETs could have been damaged. Electronics can fail randomly and spectacularly after they've been damaged like that.

How do you connect the batteries? Could you have reversed polarity? That is a common mistake which results in the ESC exploding like that.

hmm only explanation. It always did that. I did change one setting on the esc. I changed the thermal to cut off at a hotter temp because either the thermal or voltage cutoff was activating early at 3.9 -3.8 volts per cell

impossible . I have xt90 connectors and was running In series. I guess I’ll just go with an xlx when they are back in stock

thermal has nothing to due with lvc….lvc was cutting on when you hit the go lever on ur radio. thermal cutoff is totally a different reason...do you know for sure what batterys voltage was?.

Double check everything before hooking up another ESC, if the ESC was hitting thermal cutoff so regularly it could be caused by the gearing or by something binding elsewhere in the vehicle. Take the pinion off and spin the drivertrain, if it doesn't spin freely you may have blown bearing somewhere which can cause a lot of drag and excess heat.

Which 4s packs are you using?

Yes I have voltage meters. What I meant is I wasn’t sure if it was the voltage cut of or thermal. Esc never got to the thermal cut off temp