The switch I used is the stock key switch on the A2B Metro. The bike was already set up for two packs.
fechter said:Which resistors are smoking?
Ykick said:This. And why are you plugging the JST connector at an angle? I always avoid doing that.
fechter said:Ykick said:This. And why are you plugging the JST connector at an angle? I always avoid doing that.
The idea is to make the cell connections sequentially so that you don't get more than one cell voltage across the shunt circuits.
If you attached the pack negative, then say the most positive cell, you'd wind up with a bunch of floating shunt circuits trying to equalize the full pack voltage. This may result in some shunts turning on and giving more than normal voltage to an adjacent cell circuit.
If you just make the connection quick, there shouldn't be enough time to fry anything, but it doesn't hurt to avoid potentially damaging conditions.
izeman said:i don't see a need for special connect/disconnect order.
if you only disconnect B- at any time, there is still a connection to most negative cell of the pack by the first balance wire.
if you disconnect the balance wires at all and have the main power leads connected the BMS doesn't care about it.