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What does 2.5-3.0V mean on BMS specs?

I'm considering buying a cheap BMS to prevent the lithium-ion battery from over-discharging, but I'm confused about the BMS specs. Basically every BMS I could see listed the overdischarge cutoff voltage as "2.5–3.0 v ± 0.05 v.". What exactly does this mean? Is it set at 2.5 V or 3V?

Battery Management System
September 27, 2023

“2.5-3.0V” in the BMS specs means the operating range or working voltage range of the BMS.

Minimum voltage (2.5 V): This represents the minimum acceptable voltage range. If the voltage of the battery falls below this minimum threshold (2.5V in this case), the BMS may not operate effectively and may trigger protective measures to prevent further discharge or damage to the battery.
Maximum voltage (3.0 V): This is the upper limit of the acceptable voltage range. It represents the highest voltage at which the BMS can operate without problems. If the battery voltage exceeds this maximum threshold (3.0V), the BMS may take protective measures to prevent overcharging or other potential hazards.

MORE: How do you decide which BMS to use to run a 24V battery?

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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