Type	2S lithium battery protection board
Compatible interface	I2C
Battery Type	Li-ION
Over charge detection voltage(Cell)	4.250V±0.025V   Adjustable
Over Discharge Detection Voltage(Cell)	2.500V±0.050V  Adjustable
Over Current Discharge	5A±0.2A  Adjustable
Over Current Charge	5A±0.2A  Adjustable
Discharging Temperature	-30℃~65℃  Adjustable
Charge Temperature	-0℃~45℃  Adjustable
Dimension	64*23*2 mm
Sample	Available

 

Our 2S Lithium Battery Protection Board is an advanced Battery Management System (BMS) designed specifically for 2-series lithium-ion (Li-ion) or lithium-polymer (LiPo) battery packs. This essential PCB ensures the utmost safety, performance, and longevity of your 7.4V battery configurations by providing comprehensive protection and critical cell balancing功能.

Ideal for high-drain applications, this BMS prevents potential hazards like overcharging, over-discharging, and short circuits, making it a reliable and indispensable component for any professional or commercial product utilizing two lithium cells in series.

Key Features & Advantages:

• Complete Protection Suite:

  • Over-Charge Protection: Halts charging when any individual cell voltage exceeds a safe threshold (typically 4.25V ± 25mV), preventing damage and thermal runaway.

  • Over-Discharge Protection: Disconnects the load when any cell voltage drops too low (typically 2.5V ± 50mV), safeguarding against irreversible cathode damage.

  • Over-Current & Short-Circuit Protection: Instantly cuts off output during excessive current draw or a short circuit (response time < 10ms), protecting both the battery and the device.

  • Temperature Protection (Optional): Some models include an NTC thermistor port for real-time temperature monitoring, disabling charging/discharging in extreme conditions.

• Cell Balancing Function: This is a critical feature for 2S packs. The built-in balancing circuit ensures both cells in the series string charge to the same voltage, maximizing capacity and preventing performance degradation caused by voltage imbalance over time.

• High Current Capability: Available in various current ratings (e.g., 10A, 15A, 25A continuous discharge) to support power-hungry devices like e-bikes and power tools.

• Low Power Consumption: Features ultra-low self-drain, preserving battery energy when the device is not in use.

• Robust & Compact Design: Designed with high-quality components for durability and a compact form factor for easy integration into battery packs.

Typical Applications:

This 2S BMS is essential for a wide range of devices requiring reliable 7.4V power:

• • Electric Mobility: E-scooters, Hoverboards, Electric Bicycles (for auxiliary systems)

  • RC Hobbies: Drones (UAVs), RC Cars, Boats, and Airplanes

  • Power Tools: Cordless drills, saws, and garden equipment

  • Portable Power: High-capacity power banks, UPS backup systems

  • Consumer Electronics: Powerful flashlights, portable speakers, video equipment

Shenzhen BAKTH Technology Co., Ltd. was established in 2002. For 21 years, it has been dedicated to battery pack assembly and PCM/BMS design and production. It has a 5,000-square-meter self-owned factory equipped with automated production lines and SMT assembly lines.