Do you need a BMS for discharge?
Solution: You do not need a full-blown BMS. Your stated charge/discharge currents are way below 18650 ratings (so you can get away without thermal sensor) and parallel cells do not need balancing. Current limit should be set slightly above your max 300 mA load, not the battery rating as typical protection circuits do.
Can you charge battery through discharge port?
No, it won’t. The discharge fets cannot shut off charge current. They are just always-on diodes to charging current flowing thru them. The only way to shut off charge current, for ANY reason (overcurrent, overvoltage, overheating, etc), is to charge thru the CHARGE fets.
Does BMS limit discharge?
So, don’t think that, just because you have a BMS on your large battery pack, you’re all set. You still have to do one more thing: you have to give the BMS a way to limit charging and discharging, to prevent over-charging and over-discharging. The BMS controls the motor driver and the charger, to protect the battery.
Can BMS protect battery from overcharging?
It can more intelligently manage and maintain each cell, improve battery utilization, prevent battery overcharge and discharge, prolong battery life, and monitor battery status. If you need a customizable BMS to prevent overcharging or other potential issues, please contact us to get more information.
What is BMS discharge?
BMS when used for discharge and charge acts as an intermediary that protects the cells and balance them. They will cut output/input when one cells is out of norms(under or over voltage) or if the whole pack is using more than the rated amp output/input.
What’s the best way to hold a BMS down?
I generally use hot glue or double sided tape to hold the BMS down, and sometimes use a couple strips of Kapton tape as well. I like to add a thin layer of foam or plastic below the BMS too, just to add a second layer of insulation between it and the battery cells. Next, I like to add my balance wires.
What kind of Charger do I need for my BMS?
Common connectors for charging are XT-60, Anderson Power Poles, XLR and DC 2.5 mm barrel connectors, but anything that can carry the load will work. At this point your BMS is completely connected, but you’re not quite done yet. Your positive charge and discharge wires usually won’t connect to the BMS.
Where does the BMS go in a battery pack?
B- gets wired to the negative end of your battery pack (positive end of the battery will go to the positive end of the components (VESC) you are powering). C- gets wired into the negative end of your charging port (positive end of the charging port will connect directly to the positive end of the battery).
When to use a BMS on an e-board?
This way your BMS doesn’t need such high current protection as charging is done with a smaller current. If you wire your BMS so it is only in use when charging your e-board, and gets bypassed when the batteries are being discharged, you can get away with this.