Recent content by kappa7

The controller has already a 2.2kohm resistor in series with the uart lines, so a 3.9kohm on the TX line connected to ground is enough to have a 3.2V CMOS signal.

The correct connection sequence really depends on the model of BMS chipset used. Some years ago I've worked with the Texas bq78pl116 and its bq76PL102 slave extender that require a very specific connection sequence. I've damaged a few chips before to discover this document...

I use this programmable step down module with an external mean well power supply (48V/220W). The only programable high voltage charger that I know is the cycle satiator (the 72V version can go to 103V output) and you can go down with the current to 0.2A. It's quite expensive (not too much if you...

I see the problem. I think that there is a safe solution to gently balance the battery once on a while and the rest of the time limit the charging to 80%: When we charge the remaining 80% to 100% we could limit the charging current at about the same value of the balance current, when any cells...

Yes your drawing seem correct but you can connect all the diodes and the swithc on the positive wire, the negative wire can go direct to the battery. In any case I've attached a simple scheme that will drop the charger voltage between about 4V (with 10mA of charging current) and 4.75V (with 5A...

The best that you can do is to find a charger that allow to choose the charging voltage with a switch (80%~= 80V, 90%~= 82V, 100%~=84V) and then you can fully charge the battery only once a while (every 10-20cycles) to let the BMS balance. When you fully charge the battery you should leave...

You have also to tell the controller that you are using a speed sensor: This is achieved by setting the P2 parameter with how many pulses per revolution give your sensor (0 mean disabled, probably your current setting). See here to know how to change the parameter.