I made some press-fitting mounts to hold xt90 connectors and boy are they tight. Iām obviously going to add something like e6000, JB Weld, or epoxy but already I highly doubt itās even needed since the press fit is so strong.
It takes several times more force to insert/remove the plugs than to insert/remove the cables AND thereās a guard on the back of it to prevent it ever being pushed into the case.
Why two though? If youāre using loopkey and charge, then charge needs to be XT30 or XT60. That way the loopkey canāt be accidentally put in the wrong hole. Humans make mistakes. Also ensure you fuse the charge port. And yes, that mistake has happened before by very competent folk.
I totally know to fuse the charge port; the single one will be for chaege port, the dual one is for power out since Iām gonna run higher amps and will be doubling up on 10awg
You never know who will be reading this a year for now. The warning might not be for you. I donāt want someone to see that, and make assumptions that itās an unfused charge port and a loopkey port, and itās safe that way.
White is for a power switch, and the nub on the end of the black wires is a thermistor, designed to be tucked inside your pack to monitor the temperature of the cells.
The receiver ( arduino + nrf24l01 ) is connected to the VESC TX/RX.
The remote is powered on and I can see the throttle value changes on the LCD. I have configured FOC and I can move the motor with the PC keyboard.
I selected āSetup Inputā > NRF
Turned off the remote and selected Next.
Turned on the remote and restarted the timer.
Pressed the remote trigger button during the countdown.
My board has been draining faster lately. Maybe itās just my perception since I am no longer using my onboard boost converter to charge while riding (amazing never having a dead battery, but thatās beside the point).
I thought to check and see if I have a dead P group, since last time I charged it, it only charged to 92%, and I had it on the charger for a day and a half or more.
All of the P groups were at 3.76v +/- 0.005v except for one P group which was at 3.85v.
All the instances I see of cells drifting (I thought), its usually a P group thatās lower. What do you guys think could be causing this, and has anyone seen one P group persistently higher than the rest?
Itās got a supower 10S BMS. All readings were taken from the BMS balance connector on the BMS itself.
To fix this drift, should I just leave the board on and see if it balances just having the loop key in (EDIT: nevermind, says it balanced when cells reach 3.9v+, may just charge it up a bit and then let it balance)ā¦ should I leave it plugged in for a few days and let the BMS do itās work with the charger in, or is 0.1v+ too much of a difference for the supower BMS to handle, or should I manually discharge that P group a bit and then charge it up?
I think leaving it charging is a good starting point. My 12s does this every 10 charges or so but it hovers around 95% for ages then shows 100 but stays red. Fan stays on and the bms heats up. Eventually it goes green and is good. Try it first before you think about a strip down.
Iād just leave it charging for longer. Most BMSs have a pretty low balancing current (50mA isnāt uncommon) so a large imbalance like that can take many hours or days to correct, depending on the capacity.