The IDT-9141 is a 7S 20A battery management system designed for NMC lithium-ion battery packs. It uses a common-port configuration, allowing charging and discharging through the same negative terminal.

The BMS helps protect the battery pack during charging and discharging. Its metal plate provides physical protection and assists with heat dissipation.

KEY FEATURES

• Designed for 7-series NMC lithium-ion battery packs
• Supports 20A charging current
• Supports 20A discharging current
• Common-port charging and discharging
• Helps provide overcharge protection
• Helps provide over-discharge protection
• Helps provide overcurrent protection
• Helps provide short-circuit protection
• Metal cover for protection and heat dissipation
• Balance-wire harness included
• Compact design for battery-pack installation

TECHNICAL SPECIFICATIONS

• Model: IDT-9141
• Cell configuration: 7S
• Compatible chemistry: NMC lithium-ion
• Cell nominal voltage: 3.6V–3.7V
• Pack nominal voltage: 25.2V–25.9V
• Maximum pack charging voltage: 29.4V
• Advertised charging current: 20A
• Advertised discharging current: 20A
• Port configuration: Common port
• Main battery-negative connection: B−
• Common charge/discharge connection: C−

SUITABLE APPLICATIONS

• 24V-class NMC lithium-ion battery packs
• DIY battery projects
• Portable power systems
• Robotics projects
• Electric tools and equipment
• Backup-power applications
• Custom lithium-ion battery assemblies

PACKAGE CONTENTS

• 1 × IDT-9141 7S 20A NMC BMS
• 1 × Balance-wire harness

IMPORTANT NOTE

• Use only with a 7S NMC lithium-ion battery pack.
• Do not use this BMS with LiFePO₄ cells.
• Use a 29.4V lithium-ion charger suitable for a 7S NMC pack.
• Confirm the required continuous and peak current before purchasing.
• Verify the balance-wire sequence before connecting the harness.
• Incorrect wiring can permanently damage the BMS or battery cells.
• Installation should be performed by a trained battery-pack technician.