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Any very low charge cells may end up not recovering useful capacity if the battery has been "flat" for too long, but its always worth a go.
As requested, please reply all the cell volt measurements when you get a chance.
21.58V would be the open circuit volt of the charger as the BMS is not allowing charge, no volt reading on the battery would be discharge is disabled as well due to some very low cells.
Better off getting a small bench supply, plenty of these on aliex too.
As mentioned, the green light is just the charger "thinks" the battery is charged. (no current or volt above set value)
It is likely the BMS board (seen in bat2.jpg) is not allowing the battery to be charged.
The photo is not very clear so cant see for sure, it is fairly common the BMS board in...
Try this parcel tracking...
https://parcelsapp.com/en/tracking/
I find it quite detailed & shows alternate consignment numbers.
Your package might have had a trip to outback Australia.
I'm just meaning when I did the test, as long as something was doing Low Volt Cutout I didn't care.
I have a couple of lithium cell powered devices that don't have LVC & I have to be the BMS !
This is probably more of a physics topic ?
I received a gift of a nice old forklift battery charger, It got wet outside in the rain.
I observed the ammeter needle move when I touched the front , played around a bit & got inconsistent but repeatable needle movement & it would even hold a...
Battery & PCB are in fan enclosure so no chance of reverse battery during normal use.
Yes, the MCU would know if battery Volt is low & could stop the fan via T2.
In a test last year I discharged all the way to stop & observed the fan speed slowly decreasing in steps getting towards LVC. I...
It could also be the motor needs PWM control signal to operate.
Be careful, if inadvertently apply +V supply to PWM wire this could damage the control circuit in the motor.
When you finished playing with the motor...
Does your multimeter have Diode Test function? (most do nowdays), when you...
If I get time I will check the motor PWM characteristics.
I have been trying(not too hard) to find a supply of these motors to make some ceiling fans as I won't have mains power in the new house build. They run very quiet, unlike many single phase BLDC fans.
The Drain of T1 is to battery positive, is this what u mean?
Source (3 pins) of T1 & T2 are connected to +DC in via Diode D2.
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This is how I see it working...
T1 is PWM'd via buck circuit to the battery & T2 would be just switch on while PWM goes to the integrated BLDC controller inside the...
They would be P-ch HI side switches as the gate is switched between +V & -V by gate drive T4 & T5 <-- PWM from uC.
There is a blocking diode D2 that prevents +Vbat backfeed to DC in connector.
I found a photo from last year of mine, can see the MOSFET numbers (BA6H13) but I cant find any data...
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