18V 21V 20A Battery Charging Protection Board Lithium Battery Pack Protection

Product Features:

• High-power lithium battery protection board (75V/20A).
• Built-in high voltage MOS, which can be used for 4 series of 14.8V/16.8V/18V/20V/21V lithium batteries.
• Charging port has a temperature detection function, and 75 degrees will automatically turn off the charging.
• The EV power indicator lights up when the battery is connected, and the charging indicator light flashes when charging, and the light is long when fully charged.
• Charging process: fast charging (constant current) – balanced charging (constant voltage) – trickle charging (constant current).
• With overheating protection, overcurrent protection, short circuit protection, surge protection, under voltage protection, over voltage protection, balance protection, temperature protection, and other functions.
• Using high-quality materials to ensure product quality and safety.

Detailed specification:

• Working voltage: 14.8-21V.
• Maximum operating current: 20A.
• Maximum charging current: 15A.
• Charging temperature: -20 degrees – 80 degrees.
• Protection function: overcharge, over discharge, over current, short circuit, temperature, balance, power failure.
• Size: 71mm*24mm*4mm.
• Suitable for electric tools/massage devices/power banks and other 4S battery packs.

Key usage points:

• Easy installation: The protection board can be easily integrated into the battery pack.
• Durability: The protection board is made of high-quality materials, ensuring long-lasting performance.
• Color options: Multiple color options are available to match the design of the battery pack.

Additional features:

• The protection board supports a variety of battery types, including lithium-ion, lithium-polymer, and lithium iron phosphate.
• The protection board has a built-in temperature sensor that monitors the temperature of the battery pack and prevents overheating.
• The protection board has a built-in current sensor that monitors the current flowing through the battery pack and prevents overcurrent.
• The protection board has a built-in voltage sensor that monitors the voltage of the battery pack and prevents overvoltage and undervoltage.

What makes this product stand out from competitors?

• The protection board is designed with high efficiency and low power consumption.
• The protection board is equipped with a variety of protection functions to ensure the safety of the battery pack.
• The protection board is compact in size and lightweight, making it easy to integrate into the battery pack.
• The protection board is cost-effective and provides excellent value for money.

Relevant external links:

Lithium-Based Batteries

Battery Protection Circuits: How Do They Work?

Lithium-Ion Battery Pack BMS Circuit Diagram