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2S BMS PCM Battery Protection Board
Product Overview: 2S Lithium Battery Protection Board (BMS/PCM) The 2S BMS (Battery Management System) is a protective circuit designed for battery packs consisting of two 3.7V Lithium-ion or Lithium-polymer cells connected in series. It provides a nominal voltage of 7.4V and a full charge voltage of 8.4V. This module is essential for ensuring the safety and longevity of battery-powered devices like RC cars, portable speakers, and handheld electronics by monitoring voltage and current levels in real-time. Technical Specifications Feature Specification Compatible Battery Type 3.6V / 3.7V Lithium-ion (18650, 26650, Li-Po) Series Configuration 2S (Two cells in series) Charging Voltage 8.4V – 9.0V Continuous Discharge Current 3A to 10A (Model dependent—standard is 5A-8A) Instantaneous Current Limit 10A – 20A Quiescent Current < 10uA Internal Resistance < 100mΩ Protection Parameters Overcharge Detection: 4.25V ± 0.05V (per cell) Overcharge Release: 4.05V ± 0.05V (per cell) Over-discharge Detection: 2.50V ± 0.1V (per cell) Over-discharge Release: 3.00V ± 0.1V (per cell) Over-current Detection: Activated during current spikes to prevent cell venting. Short Circuit Protection: Self-recovery or recovery after disconnecting the load. Connection Guide B+: Connect to the Positive terminal of the battery pack. B-: Connect to the Negative terminal of the battery pack. MB (or BM): Connect to the junction point between the two batteries. P+ / P-: Output to the load and input for the 8.4V charger.
Product Overview: 2S Lithium Battery Protection Board (BMS/PCM) The 2S BMS (Battery Management System) is a protective circuit designed for battery packs consisting of two 3.7V Lithium-ion or Lithium-polymer cells connected in series. It provides a nominal voltage of 7.4V and a full charge voltage of 8.4V. This module is essential for ensuring the safety and longevity of battery-powered devices like RC cars, portable speakers, and handheld electronics by monitoring voltage and current levels in real-time. Technical Specifications Feature Specification Compatible Battery Type 3.6V / 3.7V Lithium-ion (18650, 26650, Li-Po) Series Configuration 2S (Two cells in series) Charging Voltage 8.4V – 9.0V Continuous Discharge Current 3A to 10A (Model dependent—standard is 5A-8A) Instantaneous Current Limit 10A – 20A Quiescent Current < 10uA Internal Resistance < 100mΩ Protection Parameters Overcharge Detection: 4.25V ± 0.05V (per cell) Overcharge Release: 4.05V ± 0.05V (per cell) Over-discharge Detection: 2.50V ± 0.1V (per cell) Over-discharge Release: 3.00V ± 0.1V (per cell) Over-current Detection: Activated during current spikes to prevent cell venting. Short Circuit Protection: Self-recovery or recovery after disconnecting the load. Connection Guide B+: Connect to the Positive terminal of the battery pack. B-: Connect to the Negative terminal of the battery pack. MB (or BM): Connect to the junction point between the two batteries. P+ / P-: Output to the load and input for the 8.4V charger.
