Dyno Europe 12.8v 120ah Lifepo4 Battery
These are awesome, lightly used batteries that were removed from robots. Some will be green and some will be red, both are the same battery. They have been testing amazing and they are super easy to add a BMS. You can add your own BMS by taking out the 10 phillips head screws on the front panel. That's right, a standard screw driver will open that front rectangle. From there you have access to the balance leads.
Most have a JST connector for the balance leads, if they don't we will label the wires for you. The balance leads are right there to splice into your BMS balance lead harness. If you are looking at the circuit board inside the bottom left 5 pin JST connector is the balance leads. The other wiring harnesses are for communication and temp sensors.
5 pin wiring harness configuration for the balance leads.
white wire - negative
yellow wire - positive #1
blue wire - positive #2
black wire - positive #3
red wire - main positive (#4)
Fully charged voltage 14.6
Fully discharged voltage 10.0
Nominal voltage 12.8v
Charge/Discharge max continuous (120a)
A 100a 4s lifepo4 bms is a perfect fit for this. When you remove the BMU it is likely your BMS will fit right in there with some minor cuts and wire extension. The BMS is just a balancer and a communication board, it is not a BMS. The main positive and negatives do not run through that circuit board. You new BMS that you add will have the 5 wires connected to the balance leads. The B- will go to the battery negative. The C- will then become your new negative for charge and discharge. The positive of the battery will not need to be altered. This is a simple replacement. You can also use a 30a BMS which we have for just $14 so if you plan on using this at less than 30 amps you only need a $14 BMS. You can also series these together and make a higher voltage pack with just 1 BMS. Excellent value here for a 12v 120ah pack. We already checked these to make sure they are balanced.
Roughly 10" wide x 8.5" tall x 7" deep
35 lbs.