2S 10A BMS Protection Board — 7.4V Ternary Polymer Li-ion (Power Type)

Overview

This 2S 10A protection board is a high-performance Battery Management System (BMS) for 2-series (7.4V) ternary polymer lithium-ion packs. Built around a mature dedicated protection IC and imported high-current MOSFETs with ultra-low internal resistance (as low as 3 mΩ per MOS), it delivers a steady 10A continuous discharge and handles short-term spikes up to 25A — well suited to high-torque DC motors, power tools, robotics, and RC models. It provides precision overcharge and over-discharge monitoring on each cell, plus automatic short-circuit and over-current protection. The ultra-compact footprint and low-resistance MOSFET design keep heat buildup minimal, preserving the life of your 7.4V pack. Clearly labeled pads make wiring for charge and discharge straightforward.

Parameter Value

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Type Power-type 2S Li-ion BMS

Cell configuration 2 series (2S) — 7.4V nominal

Nominal pack voltage 7.4V (2 × 3.7V)

Full-charge voltage 8.4V (2 × 4.2V)

MOS internal resistance As low as 3 mΩ per MOS (imported)

Continuous charge current 10A

Continuous discharge current 10A

Peak / protection current 25A (short-term)

Overcharge protection (per cell) 4.25 – 4.35V [confirm]

Over-discharge protn (per cell) 2.40 – 2.50V [confirm]

Cell balancing [confirm — required for true 2S]

Short-circuit protection Yes

Working temperature −40°C to +85°C

Storage temperature −40°C to +125°C

Board dimensions [confirm — 1S spec listed 23.6×11.3×3.4mm]

Battery-side pads B+ / B− / midpoint(B1) [VERIFY midpoint exists]

Key Features

• 25A instantaneous current — robust handling of peak loads for high-drain devices.

• 7.4V (2S) optimization — tuned for 2-series 3.7V ternary polymer cells.

• Comprehensive protection — over-current, short-circuit, and per-cell voltage safeguards.

• High-efficiency PCB — high-current MOS tubes and low internal resistance for superior thermal performance.

• Compact footprint — fits robotics, RC, and portable 2S enclosures.

Applications

High-torque DC motors, power tools, electric drills, robotics, and RC models running 2-series 7.4V packs.

FAQ

• Is 25A a continuous rating? No — 10A is continuous charge/discharge; 25A is the short-term protection/spike threshold.

• Does it balance the two cells? A proper 2S board should — confirm balancing is present, as it's essential for 2-series pack health.

• Can I wire it to a 7.4V pack right away? Only after confirming it's genuinely 2S (midpoint pad present). Never connect a 1S board to 7.4V.

• Which cells fit? Two 3.7V Li-ion/LiPo cells in series, including 18650 and pouch cells