40A BMS

40A Smart BMS — Light Load Protection for E-Bikes, Scooters & Portable Power

The JKBMS 40A BMS series covers light-load applications across multiple voltage platforms — from compact e-bike battery packs and electric scooters to portable power stations and RV auxiliary batteries. Standard version includes Bluetooth, UART, and LCD display interface; optional CAN, RS485, heating, alarm, parallel, and ACC detection available.

Compatible chemistries: LiFePO4 / Li-ion / LTO

Available Models & Cell Configurations

Model Balance Current Li-ion (Ternary) LiFePO4 (Iron) LTO (Titanate)
JK-BD4A8S4P 0.4A 3S – 8S 3S – 8S 7S – 8S
JK-BD4A17S4P 0.4A 7S – 17S 8S – 17S 14S – 17S
JK-BD4A20S4P 0.4A 7S – 20S 8S – 20S 14S – 20S
JK-BD4A24S4P 0.4A 7S – 24S 8S – 24S 14S – 24S
JK-BD6A20S4P 0.6A 7S – 20S 8S – 20S 14S – 20S
JK-BD6A24S4P 0.6A 7S – 24S 8S – 24S 14S – 24S

Protection current: 40A (4P)

Typical Applications

  • ✅ E-bikes & electric scooters (24V–72V, light load)
  • ✅ Electric skateboards & personal mobility
  • ✅ RV auxiliary batteries and marine electronics
  • ✅ Portable power stations and camping power
  • ✅ Solar street light batteries
  • ✅ Small UPS & backup power systems

📖 Not sure which BMS to choose? View our BMS Selection Guide →