2S 20A 18650 Lithium Battery Protection Board

HX-2S-D20 BMS Charge-Discharge Controller Module

The HX-2S-D20 Battery Management System (BMS) is designed to monitor the status of batteries, regulate their charging and discharging processes, and provide various protection functions. Specifically designed for two 18650 batteries, this module ensures safe operation by offering overcharge, over-discharge, and short-circuit protection. It cuts off the power supply when one of the connected batteries reaches full charge, providing reliable and secure battery management.

This BMS controller operates for over 30,000 hours and can handle a maximum current of 20A, making it ideal for high-performance battery setups. Its compact size and straightforward design make it perfect for use with a four-cell battery pack.

Key Features:

• Battery Monitoring: Continuously monitors the status of two 18650 batteries for optimal performance and safety.
• Over-Charge and Over-Discharge Protection: Safeguards the batteries by preventing damage due to excessive charging or discharging.
• Short-Circuit Protection: Automatically disables power in the event of a short circuit, protecting the batteries and module from harm.
• Power Supply Cutoff: Automatically cuts off power when a battery reaches full capacity to prevent overcharging.
• Compact Design: Small and efficient, perfect for use in a four-cell battery pack.
• Long Lifespan: Designed to operate for over 30,000 hours for long-term reliability.
• Current Handling: Capable of handling up to 20A of maximum current.
• Voltage Range: Operates with a voltage range of 7.4V to 8.4V.

Wiring Pins:

• B+: Battery positive pole
• B-: Battery negative pole
• BM: Mid-point of a battery assembly
• P-: Negative charge/discharge terminal
• P: Positive charge/discharge terminal

Protection Mode:

If the maximum permissible supply voltage is exceeded, the charge controller automatically activates the “protection” mode. To restore the module, either re-apply voltage to the input or wait for the module to automatically disable the protection.

Power Supply:

• The module is powered by an external power source with a voltage range of 7.4V to 8.4V.
• For charging, it is recommended to use a step-up voltage converter with a current limiter.
• Note: This module is not a charger itself, but a charge-discharge controller.

Applications:

The HX-2S-D20 BMS Module is ideal for a variety of battery-powered applications, ensuring safe and efficient operation of two 18650 lithium-ion batteries in configurations like:

• Electric vehicles (EVs)
• Power tools
• Battery-powered devices
• Solar storage systems