Balancer BMS 3S 20A - 12.6 V Li-Ion 18650 Cell Charger with Protection

Balancer BMS 3S 20A - 12.6 V Li-Ion 18650 Cell Charger with Protection

The BMS 3S charger and balancer module is intended for Li-Ion 18650 and Li-Po 26650 batteries. The circuit supports packs made up of 3 cells at 12.6 V. It provides comprehensive cell protection, including over-discharge protection at 3 V per cell.

Key technical specifications

• Supported batteries in 3S configuration: Li-Ion, LiCoO2, LiMn2O4, Li(NiCoMn)O2, Li-Po
• Circuit supply voltage: 12.6 V
• Overcharge protection per cell: 4.25 - 4.35 V
• Over-discharge protection per cell: 3 V
• Maximum charging current: 10 A
• Maximum continuous operating current: 20 A
• Compact dimensions: 36 x 21 x 4 mm

Example applications

• Converting power tools and cordless drills to Li-Ion 12.6 V 20 A packs
• Building custom power packs for RC models
• Emergency power systems and portable energy storage
• Powering portable lighting that requires 12 V
• Electronic projects requiring independent battery power

Benefits

• Longer pack life thanks to built-in protections
• Protection against battery damage through voltage control
• High current capability for demanding devices
• Small size for mounting in tight power tool housings
• Versatility through support for many popular lithium cell types

Important operating information

When using the charger, use only cells with identical voltage, capacity, and internal resistance. Do not mix new and used cells to ensure correct and safe module operation.