The 3S Lithium Battery Protection Board is a critical safety and
performance component engineered exclusively for 3-cell series (3S)
lithium battery packs, including Li-ion, Li-polymer, and LiFePO4
configurations. Designed to prevent battery damage and mitigate
safety risks, this board acts as a “guardian” for 3S battery
systems, ensuring stable operation and extending the lifespan of
connected battery packs—making it essential for consumer
electronics, industrial devices, and portable power solutions.
Core Protection Functions for 3S Battery Packs
Tailored to 3S battery packs (typical nominal voltage: 11.1V for
Li-ion, 9.6V for LiFePO4), this board delivers multi-layered
safeguards:
- Overcharge Protection: Triggers when any cell voltage exceeds 4.25V (Li-ion) or 3.65V
(LiFePO4), cutting off charging current to avoid cell swelling or
thermal runaway.
- Undervoltage Protection: Shuts down discharge when a cell drops below 2.5V (Li-ion) or
2.0V (LiFePO4), preventing irreversible battery capacity loss.
- Overcurrent & Short-Circuit Protection: Instantly blocks high currents caused by short circuits or
overloads (e.g., faulty devices), protecting both the battery and
connected equipment.
- Cell Balancing: Automatically equalizes voltage across the 3 cells during
charging, ensuring each cell charges uniformly—eliminating “weak
cell” issues that reduce overall battery capacity and lifespan.
High Precision & Low Power Consumption
Equipped with high-sensitivity voltage detection chips, the board
monitors each cell’s voltage with a precision of ±2mV, ensuring
timely and accurate protection responses. Its ultra-low static
current (<10μA) minimizes power drain when the battery pack is
idle, preventing unnecessary capacity loss during storage or
non-use. The board also features a fast recovery function: once the
fault condition (e.g., overcurrent) is resolved, it resumes normal
operation without manual reset—enhancing user convenience.
Wide Compatibility & Durable Design
This protection board supports 3S battery packs with capacities
ranging from 1000mAh to 20000mAh, making it versatile for diverse
applications. It is compatible with common lithium battery
chemistries (Li-ion, Li-polymer, LiFePO4) and works seamlessly with
standard chargers and discharge devices. Constructed with a
flame-retardant PCB board and high-quality electronic components,
it resists high temperatures (operating range: -20°C to 85°C) and
mechanical stress, ensuring reliability in harsh environments
(e.g., outdoor tools, industrial sensors).
Versatile Application Scenarios
Ideal for any 3S lithium battery-powered device, including:
- Consumer electronics: 3S drone batteries, portable power banks, and
high-power LED flashlights;
- Industrial equipment: 3S electric tools (e.g., cordless drills),
IoT sensor batteries, and small medical devices;
- Recreational gear: 3S e-scooter auxiliary batteries, camping
lanterns, and RC toy power packs.
