20S 50A DALY Li-ion BMS 

Product Description:

The 20S 50A DALY Li-ion BMS is a high-quality Battery Management System engineered for 72V lithium-ion battery packs (20 cells in series). It ensures safe and stable operation by providing full protection against overcharge, over-discharge, overcurrent, and short circuits, while also balancing individual cell voltages. With a continuous 50A discharge rating, this BMS is well-suited for medium- to high-power applications such as electric bikes, scooters, solar battery banks, and energy storage systems.

Key Features:

• Compatible with 20S (72V nominal) Li-ion battery packs

• 50A continuous discharge current

• Full protection: overcharge, over-discharge, overcurrent, short circuit

• Passive cell balancing for battery longevity and safety

• Temperature protection (NTC sensor supported)

• Separate charge/discharge port support (optional)

• Compact and robust PCB design

Technical Specifications:

• Battery Type: Lithium-ion (3.7V nominal per cell)

• Series Configuration: 20S

• Nominal Voltage: 72V

• Maximum Charge Voltage: 84.0V (4.2V × 20 cells)

• Continuous Discharge Current: 50A

• Balance Current: Approximately 30–50mA

• Overcharge Protection Voltage: ~4.20V ± 0.05V per cell

• Overdischarge Protection Voltage: ~2.7V ± 0.1V per cell

• Overcurrent Protection: Yes

• Short Circuit Protection: Yes

• Temperature Protection: Yes (NTC sensor required)

• Operating Temperature: -20°C to +70°C

• Storage Humidity: ≤ 90% RH (non-condensing)

Applications:

• Electric bikes, scooters, and motorcycles

• Solar energy storage and off-grid systems

• DIY 72V lithium-ion battery packs

• Portable power stations and UPS systems

• Light EVs and renewable energy projects