A 3S 20A Battery Management System (BMS) protection board designed for compatible lithium battery packs made from three cells connected in series. It supports an 11.1V nominal battery pack with a 12.6V full-charge voltage and provides protection against overcharge, over-discharge, overcurrent and short circuits. Auto recovery is supported by the specified board version.

Full Description

The 3S Lithium Battery Protection Board is designed to protect compatible lithium-ion and lithium-polymer battery packs configured with three cells in series. It is suitable for compatible 18650, 26650 and LiPo cells with a nominal cell voltage of 3.6V or 3.7V.

The board supports a specified maximum discharge current of 20A and incorporates battery protection functions intended to help prevent damage caused by overcharging, excessive discharge, overcurrent and short circuits. The Auto Recovery feature allows the board to resume operation automatically after certain protection events, depending on the board design and fault conditions.

Important: This is a battery protection board, not a standalone charger. Use a compatible 12.6V lithium battery charger for a 3S pack. Verify the wiring sequence and ensure all cells are compatible before use.

Technical Specifications

Product Applications

• 3S lithium battery pack assembly.

• Portable electronics projects.

• Compatible battery-powered lighting systems.

• DIY electronics and remote-control projects.

• Battery packs requiring protection for loads up to the board's specified current rating, subject to suitability checks.