17S 40A DALY Li-ion BMS 

Product Description:

The 17S 40A DALY Li-ion BMS is a robust Battery Management System designed for 17-series lithium-ion battery packs (approx. 63V nominal). It offers reliable protection, passive cell balancing, and temperature monitoring capabilities, making it ideal for medium-power lithium battery applications such as electric bikes, solar energy systems, and portable power solutions.

Key Features:

• Compatible with 17S (63V nominal) lithium-ion battery packs

• Supports up to 40A continuous discharge current

• Provides protection against overcharge, over-discharge, short circuit, and overcurrent

• Passive balancing for improved cell consistency and lifespan

• Supports NTC-based temperature protection (sensor required)

• Rugged and compact PCB design

• Optional separate charging and discharging port configuration

Technical Specifications:

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

• Series Configuration: 17S

• Nominal Voltage: 63V

• Maximum Charge Voltage: 71.4V (4.2V × 17 cells)

• Continuous Discharge Current: 40A

• Balance Current: Approx. 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 supported)

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

• Humidity: ≤ 90% RH (non-condensing)

Applications:

• Electric bicycles, scooters, and motorcycles

• Solar and renewable energy battery storage systems

• DIY lithium-ion battery packs (63V)

• Portable energy stations and UPS systems

• Energy backup and management systems