The JK-BD4A17S4P is a compact 40A BMS covering the 8S–17S voltage range (24V–51V) — designed for e-bike battery packs, light electric scooters, and small backup power systems in the light-load category. Bluetooth and UART for LCD display monitoring are built in; RS485 and CAN are available as optional add-ons.
Voltage Platform & Load Class — Where This BMS Fits
📊 8S–17S (24V–51V) — Light Load, Mid-Voltage
The 8S–17S range covers e-bike battery packs (36V–48V) and light electric scooters in the light-load category. At 40A, this BMS is sized for commuter and recreational applications — not high-draw motors or inverters, but reliable protection and active balancing for everyday cycling use.
⚡ 0.4A Active Balancing — Cell Health for Every Cycle
Active balancing continuously transfers energy between cells, keeping your pack balanced and efficient through every charge/discharge cycle.
Who Is This BMS For?
🚲 E-bike battery packs (36V–48V, light load)
🛴 Light electric scooters
🔋 Small backup power systems (24V–51V)
🏭 OEM manufacturers of 24V–51V 40A compact lithium battery packs
Custom Configuration Available
All JKBMS products support feature customization for OEM orders — including communication interfaces, protection thresholds, balance parameters, and hardware configuration. 📩 Contact us to discuss your custom requirements.
OEM / ODM & Bulk Orders
📩 For wholesale pricing, MOQ, and custom configurations, please contact us directly.
