3S 60A BMS 11.1V Lithium Battery Protection Board with Balance — For 18650 Battery Packs

Keep your 3-cell lithium battery pack running safely and efficiently with this high-performance 3S 60A Battery Management System (BMS). Designed for 18650 and similar lithium battery configurations, this compact protection board delivers continuous 60A output, intelligent cell balancing, and a full suite of safety protections — all in one reliable module. Made in Mainland China.

Key Features

High-Current Capability: Supports continuous 60A operating current with up to 110A instantaneous peak current for demanding applications.
Active Cell Balancing: Automatically balances individual cells at 4.125V (±25mA) to equalise charge across all cells, extending overall battery pack cycle life.
Comprehensive Protection Suite: Safeguards against overcharge, over-discharge, discharge overcurrent, charging overcurrent, short circuit, open circuit, and overtemperature conditions.
Ultra-Low Standby Current: Only 15µA static power consumption — ideal for applications where the battery sits idle for extended periods.
Stable 12.6V Full-Charge Output: Specifically engineered for 3-cell (3S) lithium battery packs with a fully charged voltage of 12.6V–13V.
High-Precision Detection Circuit: Accurate voltage sensing ensures protection thresholds are triggered reliably and consistently.
Wired Connection: Simple wired integration into existing battery pack assemblies.

Technical Specifications

Configuration	3S (3-cell series)
Nominal Voltage	11.1V
Full Charge Voltage	12.6V – 13V
Operating Current	60A continuous
Instantaneous Max Current	110A
Overcharge Protection Voltage	4.25V ±15mA (per cell)
Over-Discharge Protection Voltage	2.7V ±50mA (per cell)
Balancing Activation Voltage	4.125V ±25mA (per cell)
Static Current	15µA
Input Voltage Range	Below 50V AC / 75V DC
Connection Method	Wired
Package Included	1 / 2 / 3 pcs (as selected)
Origin	Made in Mainland China

What's Protected?

This BMS board monitors and protects against 8 types of fault conditions: overcharge, over-discharge, cell balancing imbalance, open circuit, discharge overcurrent, short circuit, charging overcurrent, and overtemperature. This level of multi-layer protection makes it suitable for e-bikes, DIY power tools, portable power stations, RC vehicles, solar energy storage, and other high-demand lithium battery applications.

Related Products You May Need

Safety & Standards Reference

For guidance on safe handling and storage of lithium-ion batteries, refer to the U.S. Consumer Product Safety Commission (CPSC) – Lithium-Ion Battery Safety resource.

Note: Due to manual measurement, a dimensional tolerance of approximately ±5mm may exist. Slight colour variation between product images and the actual item may occur due to lighting conditions.

Learn more: Battery management system

Frequently Asked Questions

Q: What does a 3S BMS protection board do for an 18650 battery pack?

A: A 3S BMS (Battery Management System) protection board monitors and manages a series-connected 3-cell lithium battery pack (such as those built from 18650 cells). It actively balances cell voltages during charging, and triggers automatic cutoffs if any cell experiences overcharge (above 4.25V), over-discharge (below 2.7V), overcurrent, short circuit, or overtemperature conditions — keeping your battery pack safe and maximising its usable lifespan.

Q: What applications is this 3S 60A BMS board suitable for?

A: This board is well-suited for high-drain applications that use 11.1V (3S) lithium battery packs, including electric scooters, e-bikes, power tool battery packs, DIY portable power stations, robotics, RC vehicles, and solar storage systems. Its 60A continuous and 110A instantaneous current ratings make it capable of handling demanding loads reliably.

Q: How does the cell balancing function work on this BMS?

A: The board's balancing circuit activates when any individual cell reaches 4.125V (±25mA) during charging. It redistributes charge to ensure all three cells in the series pack reach their full voltage evenly. This prevents weaker cells from being over-stressed, which extends the overall cycle life and maintains consistent capacity of the entire battery pack over time.

Q: Can I use this BMS board for both charging and discharging?

A: Yes. This is a combined charge/discharge BMS. It monitors and protects the battery pack during both the charging phase (overcharge, charging overcurrent) and the discharging phase (over-discharge, discharge overcurrent, short circuit), making it a fully integrated solution for 3S lithium battery management.