16s 200a Lifepo4 BMS
These were recovered from 16s 48v lifepo4 batteries that had a bad cell. We recovered the BMS units out of them and are offering them for sale at a very low price.
Weight is 1.1 lbs. These have a large aluminum heat sink.
Dimensions are 6" x 2.75" x 1.25"
Wires are at least 8" long.
B- goes to battery main negative. C- becomes your new main negative.
This BMS has 16 balance lead wires. Instead of the first balance lead wire on the right going to main negative this BMS already has that connection as part of the main B- connector.
So right to left looking at the photo of the balance leads cell #1 in series positive gets the first wire (B1). Going right to left in order. Cell #2 in series positive gets the 2nd wire from right to left. Cell number 3 in series positive gets the 3rd wire. Keep going in order right to left until the last wire on the left goes to the 16th cell positive (main positive). You should understand how to wire a BMS before trying so if you don't really understand this description we recommend getting a BMS with a wiring diagram. We don't have a diagram for this one since we don't know the model number. It wires up like most BMS units except main negative 1st balance lead wire is already part of the B- main connector. There are 16 total balance leads, one for each series of 16 cell positives from right to left.
Max continuous charge current 100a.
Max continuous discharge current 200a.
Max pulse discharge (3 seconds) 500a.
There are temperature sensors. Cold temp cutoff below 34F and over temp cutoff at 130F.
There is passive balancing as well but not sure the balancing current. Likely standard 100ma balancing near top end of charge.
Operating Voltage between 43.2-58.4v
Note: The battery this came out of was using 72ah cells that were rated for 2C. It is possible with the 3 main wires instead of 4 being used that this is set up for max 150a instead of 200a (50a per wire). If you want to use this for up to 200a we would recommend adding a 4th wire to that open terminal. You will just need a bolt. Otherwise, as is, you should limit to 150a. That is actually best practice anyway for a BMS. You should always try to limit the max amps to 75% or less so the BMS operates cooler and lasts longer. This does not have bluetooth.