BMS 3S -20A

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3S -20A LI-ION TDT BMS

3S 20A TDT Li-ion Battery Management System (BMS)

Product Code: TDT-3S20A
Configuration: 3 Series (3S)
Rated Discharge Current: 20A
Battery Type: 18650 / Li-ion / Li-polymer
Brand: TDT
Category: Battery Management System (BMS)


Product Description

The 3S 20A TDT Li-ion BMS is a high-performance battery protection circuit designed for 3-cell lithium-ion battery packs. It delivers up to 20A continuous discharge current, making it suitable for medium- to high-power applications such as electric bicycles, portable inverters, solar power systems, and robotics.

Built with high-quality MOSFETs and intelligent protection circuitry, this BMS provides robust protection against overcharge, over-discharge, overcurrent, and short circuits. Its compact design with strong thermal stability ensures long-lasting performance.


Technical Specifications

Parameter Specification
Battery Type Li-ion / Li-polymer
Cell Configuration 3S (3 cells in series)
Charging Voltage 12.6V (4.2V × 3 cells)
Rated Discharge Current 20A
Max Discharge Current 25–30A (short duration)
Overcharge Protection ~4.25V ± 0.05V per cell
Over-discharge Protection ~2.5V ± 0.05V per cell
Overcurrent Protection Yes
Short-circuit Protection Yes
Balancing Function No
Operating Temperature -20°C to +60°C
Board Dimensions Approx. 60mm x 22mm x 3mm
Weight Approx. 9g

Key Features

  • 20A continuous current handling

  • Multi-layer PCB with high thermal stability

  • Overcharge and over-discharge protection

  • Overcurrent and short-circuit protection

  • Designed for high-reliability Li-ion battery packs

  • Compact size for versatile integration

  • No automatic balancing function (manual balancing recommended)


Applications

  • Medium-power E-bikes and Scooters

  • Portable Power Banks and Inverters

  • Solar Charging and Energy Storage Systems

  • Robotics and IoT Power Solutions

  • 18650 Battery Pack Assemblies

  • LED Lighting Systems and UPS Backups

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© copyright all right reserved 2025 EV Parts India Design & Developed By