20S 30A DALY Li-ion BMS 

Product Description:

The 20S 30A DALY Li-ion BMS is a compact and efficient Battery Management System designed for 20-cell lithium-ion battery packs in series (approximately 72V nominal). This BMS offers all essential safety features including overcharge, over-discharge, overcurrent, and short-circuit protection, along with passive cell balancing. Ideal for medium-power applications such as e-bikes, scooters, energy storage, and DIY battery projects.

Key Features:

• Supports 20S (72V nominal) lithium-ion battery configuration

• 30A continuous discharge current

• Built-in protection: overcharge, over-discharge, short circuit, overcurrent

• Passive balancing to maintain cell voltage uniformity

• Supports NTC temperature sensor for thermal protection

• Optional separate ports for charge and discharge

• Durable and compact 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: 30A

• Balance Current: Approx. 30–50mA

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

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

• Short Circuit Protection: Yes

• Overcurrent Protection: Yes

• Temperature Protection: Yes (NTC sensor required)

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

Applications:

• Electric bicycles and scooters

• Medium-capacity energy storage systems

• DIY 72V lithium-ion battery packs

• Portable power banks and UPS systems

• Power backup and renewable energy solutions