I have an ebay 10S 36Volt 35A Li-ion Lipolymer Battery BMS and 10 Li ion cells in series for 36 volts. initally charged to 37 volts, all batteries at about 3.7 volts. Im using a brushless 350 watt motor and controller
all of the cells are now at 3.5 volts except for one that is at 2.9, I will remove it.
I rode the bike a few KM and voltage went down to 30 volts, and something cut out, dont know if it was the BMS or controller. I understand that is low voltage, but I would like to know if the BMS is working. I tested at the battery output at I found it to be 30 volts or so, but if the BMS was working, would there not be 0 volts?
I tried to test the BMS, and each red wire tested with the mult-meter, between black, would read a fluctuating voltage...like 5, 6, 8 etc (dynamic, not a steady state). I thought each wire was supposed to read 3.7, for ex. to each cell. all voltages should be the same? Same issue between red sense wires; fluctuating voltages, not a steady 3. 7 or 3.5.
is there a way to test the BMS? I have included a diagram from the supplier, and a picture of my battery setup. A few of the red sense wires are disconnected now, as I was testing them individually. Same results. My question is, how do I know the BMS is working?
I dont think I have it connected wrong. I have the sense wire connector black wire going to the end series battery negative. then another black wire going from the end negative series battery, to the BMS B (-) pad. In the diagram, they seem to have that negative wire cut out of the picture, but its supposed to be connected to the B (-) pad, on the BMS.
the last red sense wire is going to the series battery end positive, and another red wire going to the load, and the BMS P (-) going to the load negative.
all of the cells are now at 3.5 volts except for one that is at 2.9, I will remove it.
I rode the bike a few KM and voltage went down to 30 volts, and something cut out, dont know if it was the BMS or controller. I understand that is low voltage, but I would like to know if the BMS is working. I tested at the battery output at I found it to be 30 volts or so, but if the BMS was working, would there not be 0 volts?
I tried to test the BMS, and each red wire tested with the mult-meter, between black, would read a fluctuating voltage...like 5, 6, 8 etc (dynamic, not a steady state). I thought each wire was supposed to read 3.7, for ex. to each cell. all voltages should be the same? Same issue between red sense wires; fluctuating voltages, not a steady 3. 7 or 3.5.
is there a way to test the BMS? I have included a diagram from the supplier, and a picture of my battery setup. A few of the red sense wires are disconnected now, as I was testing them individually. Same results. My question is, how do I know the BMS is working?
I dont think I have it connected wrong. I have the sense wire connector black wire going to the end series battery negative. then another black wire going from the end negative series battery, to the BMS B (-) pad. In the diagram, they seem to have that negative wire cut out of the picture, but its supposed to be connected to the B (-) pad, on the BMS.
the last red sense wire is going to the series battery end positive, and another red wire going to the load, and the BMS P (-) going to the load negative.