Do I need to install a BMS for 3S battery of my first quadcopter?

In my years of experience with electronics, I always make sure to put some protection circuitry on it whenever I use a battery that contains lithium. Now that I have to use larger batteries, don't they need any protection? I've seen a lot of drones without BMS.

When assembling quadcopters, it is usually not necessary to use a BMS for 3S battery.

  1. Your lithium battery charger will manage the battery while discharging or charging. BMS is mainly used in lithium battery packs to monitor and manage the status of multiple lithium battery cells, ensuring that they are charged and discharged in a balanced manner, while providing functions such as overcharge and over-discharge protection.
  2. For a quadcopter, you’ll typically use a single 3S lithium battery (that’s 11.1 volts) instead of connecting multiple batteries together to form a battery pack. Thus, only one cell needs to be managed, and there is no need for the balancing control of multiple cells. In this case, you can connect the 3S battery directly to your quadcopter without the need for an additional BMS.

MORE: How can wireless BMS contribute to the smart battery ecosystem?

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