is an upgraded motherboard designed for 36V electric scooters. It is designed to handle high-power demands while maintaining safety and efficiency. Often sold as part of a complete controller set, it includes a controller board, LED display/dashboard, accelerator (throttle), headlights, and a tail light.
Ensure the scooter is turned off and the battery is disconnected before starting the installation.
| Symptom | Likely Cause | Fix | |---------|--------------|-----| | No output, status LED off | No enable signal | Pull pin 5 high via 10kΩ resistor | | Intermittent switching above 80 kHz | Insufficient bypass capacitance | Add 0.1µF X7R cap near pin 6 | | Overtemperature shutdown at low load | Heatsink improperly seated | Reapply thermal paste; check for warped PCB | | Output stuck high | Damaged output FET | Exceeds 30A surge; replace module | | Excessive EMI | Long output leads | Twist output wires; add ferrite bead |
The KCQ-YB-HFZ-PRO-V2.0 is a 36V, 350W electric scooter motor controller and display motherboard, frequently used as a 15A replacement component for Xiaomi M365 clones and similar budget vehicles. Often featuring sinusoidal control for smoother acceleration, it is utilized as a drop-fit replacement for various 8.5-inch motor setups, though it may be prone to failure under extreme, high-load scenarios, say AliExpress users. Further details on user experiences can be found on Reddit . Gyrocopters Flash 3.0 Randomly Dies : r/ElectricScooters
—controllable via the single soft-button on the dashboard. Advanced Intelligent Features App Connectivity : Integrated Bluetooth allows connection to the KCQ Scooter App
While the is still early in its lifecycle, KCQ Technologies has hinted at a V3.0 development path. Expected upgrades include:
[Throttle Input] ---> [32-bit MCU (FOC Algorithm)] ---> [6-Tube MOSFETs] ---> [Smooth Three-Phase Current] ---> [BLDC Hub Motor] ^ | |_____________________(Real-Time Hall Sensor Feedback)_______________________________|