BMS NMC 20S 50A JBD (ZP20S007) (1551)

BMS NMC 20S 50A JBD (ZP20S007) (1551)

The JBD NMC 20S 50A BMS (model ZP20S007 / 1551) is a smart and reliable battery management system designed for 74 V lithium‑ion (NMC) battery packs. Supporting 20 cells in series (20S), this BMS is ideal for medium‑to‑high power applications such as electric vehicles, solar energy storage systems, UPS backup battery installations, and custom lithium battery projects.

Engineered with advanced safety circuitry and monitoring technology, the BMS continuously tracks individual cell voltages, total pack current, and temperature to ensure stable and safe operation. It offers multi‑layer protection against critical conditions including overcharge, over‑discharge, overcurrent, short circuits, and temperature extremes, protecting both the battery and connected systems.

The BMS also incorporates automatic passive cell balancing, which equalizes the voltage of individual cells during charging to improve battery performance and extend overall battery life. With a 50 A continuous current rating, this BMS is suitable for systems requiring moderate to heavy current—such as electric scooters, high‑speed e‑bikes, solar storage banks, UPS systems, and other high‑power lithium battery configurations.

JBD smart BMS models typically support UART communication, and many offer optional Bluetooth or CAN connectivity for real‑time monitoring and configuration through mobile apps or PC software. Users can view key operational metrics like individual cell voltages, total voltage, current, temperature, and state of charge (SOC), and can customize protection thresholds for optimum performance.

The construction uses high‑quality MOSFETs, low‑resistance circuitry, and durable PCB materials, ensuring efficient heat dissipation and reliable long‑term performance even under demanding load conditions.

⚖️ Cell Balancing

• Balancing Type: Passive balancing
• Balance Current: ~40–80 mA per cell
• Balance Start Voltage: ~4.18 V

🛡️ Protection Features

• Overcharge Protection: ~4.20–4.25 V/cell
• Over‑discharge Protection: ~2.7–3.0 V/cell
• Overcurrent Protection (charge & discharge)
• Short‑Circuit Protection
• Temperature Protection: high & low temp cutoffs
• Cell Voltage & Pack Monitoring

🌡️ Temperature Specifications

• Charge Operating Temp: 0 °C to 45 °C
• Discharge Operating Temp: -20 °C to 60 °C
• Storage Temp Range: -20 °C to 70 °C

🔌 Smart Features

• UART Communication Interface (standard)
• Optional Bluetooth Connectivity (with module)
• Optional CAN Support (model dependent)
• Real‑time monitoring via app/PC
• SOC Estimation (State of Charge)
• Adjustable safety thresholds