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Is 6S LiPo BMS required for parallel connection of 6S LiPo batteries?

If I use the same 6S lithium polymer batteries (each with a voltage of 22 V, as this is still considered safe in water) and connect them in parallel, do I need a BMS (battery management system)? Or is the BMS only for series-connected batteries?

Battery Management System
September 27, 2023

Yes, a 6S LiPo BMS is required for the parallel connection of identical 6S LiPo batteries.

A BMS is the primary way to prevent a battery pack from catching fire, so if you’re on the fence, you definitely need a 6S LiPo battery BMS. You also need an equalizer, sometimes they’re built into the BMS, and sometimes they’re not.
A BMS board monitors each cell and if the voltage of any one cell in the pack deviates too far from a safe range, it disconnects the pack from the load. This can prevent overcharging and over-discharging, both of which are required for different reasons.

MORE: Is it possible to connect two lithium-ion batteries in parallel with a separate BMS?

Jessica Liu

Jessica Liu is an engineer at MOKOEnergy with expertise in IoT devices, MCU, VCU, inverter, and BMS. She has a degree in automation, 6 years of work experience, and several certifications in project management.

Jessica Liu

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