1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Bafang BBS01B 36V 350W Mid-Drive Motor Controller. This controller is designed for electric bicycles, offering reliable performance and integration with various e-bike components. Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Safety Information
- Always disconnect the battery before performing any installation, maintenance, or repair work on the motor or controller.
- Ensure all connections are secure and properly insulated to prevent short circuits.
- Do not attempt to open or modify the controller casing. This may void the warranty and cause damage.
- Keep the controller away from water and extreme temperatures.
- Consult a qualified bicycle mechanic if you are unsure about any installation steps.
- This controller is designed for 36V systems with a 350W motor. Using it with incompatible voltage or power ratings may cause damage.
3. Package Contents
Verify that all items are present in your package:
- Bafang BBS01B 36V 350W Mid-Drive Motor Controller
- Associated wiring harnesses (pre-attached)
- User Manual (this document)
4. Product Overview
The Bafang BBS01B controller is an essential component for your mid-drive e-bike system, managing power delivery and communication between the motor, battery, and display. This latest model includes dedicated connectors for a headlight and a gear shift sensor for enhanced functionality.
Figure 4.1: Bafang BBS01B Mid-Drive Motor Controller (36V, 18A, 350W) with various wiring connections.
Figure 4.2: Comparison highlighting the new version controller with built-in gear sensor and front lamp connections, distinguishing it from older models.
Figure 4.3: Detailed view of the various connectors on the Bafang BBS01B/BBS02B motor controller, including EB-Bus, Gear Sensor, Speed Sensor, Battery, Front Lamp, Holzer Sensor, Speed Transmission, and Motor Phase.
Figure 4.4: Illustration of stable connection points for the Bafang mid-drive motor controller, showing individual connectors for EB-Bus, Gear Sensor, Speed Sensor, Battery, and Front Lamp, along with their corresponding accessories.
5. Setup and Installation
The Bafang BBS01B controller is designed for straightforward installation. Follow these steps carefully:
- Preparation: Ensure your bicycle is stable and the battery is disconnected. Gather necessary tools (e.g., wrenches, cable ties).
- Access the Motor: Depending on your bike frame, you may need to remove the crank arms and bottom bracket to access the motor housing.
- Remove Old Controller (if applicable): Carefully disconnect and remove the existing controller from the motor.
- Install New Controller: Position the new BBS01B controller into the motor housing. Ensure it fits snugly and the mounting points align.
- Connect Wiring: Connect the various wiring harnesses from the controller to their respective components:
- Motor Phase Wires: Connect the three thick wires (usually yellow, green, blue) to the corresponding motor phase wires.
- Battery Connector: Connect the main power cable to your e-bike battery.
- Display/EB-Bus: Connect the EB-Bus cable to your display unit.
- Speed Sensor: Attach the speed sensor cable and mount the sensor on the chainstay, ensuring the magnet passes close to it.
- Gear Shift Sensor: Connect the gear shift sensor cable. This sensor temporarily cuts motor power during shifts for smoother transitions.
- Headlight Connector: If using, connect your e-bike headlight to this dedicated port.
- Brake Levers: Connect the brake lever cut-off sensors (if equipped).
- Secure Cables: Route all cables neatly and secure them with cable ties to prevent snagging or damage.
- Test Functionality: Reconnect the battery and perform a functional test of the motor, display, and all connected accessories.
Figure 5.1: Visual representation of the easy installation process, showing the controller being integrated into the mid-drive motor unit.
Important Note: This controller is compatible with BBS01B and BBS02B motors. It is not compatible with older BBS01 motors manufactured in 2015 or earlier due to design differences. Ensure you have the correct controller version for your motor.
6. Operating Instructions
Once installed, operate your e-bike system as follows:
- Power On: Turn on your e-bike battery and then power on the display unit.
- Select Assist Level: Use the controls on your display to select the desired pedal assist level (e.g., 1-5). Higher levels provide more motor assistance.
- Pedal: Begin pedaling. The motor will engage and provide assistance based on your selected level and pedaling input.
- Throttle (if equipped): If your system includes a throttle, you can use it to engage the motor without pedaling, or to provide additional boost.
- Gear Shifting: When shifting gears, the gear shift sensor will momentarily cut motor power, allowing for smoother and less stressful gear changes.
- Braking: The brake cut-off sensors will disengage the motor when brakes are applied, ensuring safe stopping.
- Power Off: When finished riding, power off the display and then the battery.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your controller and e-bike system:
- Inspect Connections: Periodically check all electrical connections for tightness and signs of corrosion or damage.
- Cable Management: Ensure all cables are securely routed and not rubbing against moving parts or sharp edges.
- Cleanliness: Keep the motor and controller area clean from dirt, mud, and debris. Avoid using high-pressure washers directly on electrical components.
- Environmental Protection: Store your e-bike in a dry place, protected from extreme temperatures and direct sunlight.
- Software Updates: If available, check for firmware updates for your controller or display unit through authorized service centers.
8. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor not engaging | Battery low or disconnected; loose motor/controller connection; brake lever sensor engaged; display error. | Check battery charge and connection; inspect all wiring; ensure brake levers are not depressed; check display for error codes. |
| Inconsistent power delivery | Loose connections; faulty speed sensor; motor overheating. | Verify all connections; check speed sensor alignment and function; allow motor to cool down. |
| Display not turning on | Battery off or low; loose display cable; faulty display. | Ensure battery is charged and on; check display cable connection; test with a known good display if possible. |
| Gear shifting feels rough | Gear shift sensor not connected or faulty; mechanical drivetrain issue. | Check gear shift sensor connection; inspect and adjust bicycle gears. |
If the problem persists after attempting these solutions, please contact Bafang customer support or an authorized service center.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | BAFANG |
| Model | BBS01B |
| Rated Voltage | 36V |
| Rated Power | 350W |
| Maximum Current | 18A |
| Compatibility | BBS01B / BBS02B Mid-Drive Motors (Not compatible with BBS01 motors from 2015 or earlier) |
| Connectors Included | Headlight connector, Gear Shift Sensor connector, Speed Sensor connector, Battery connector, EB-Bus connector |
| Country of Origin | China |
10. Warranty and Support
For warranty information, please refer to the terms and conditions provided at the time of purchase or contact your retailer. Bafang products typically come with a manufacturer's warranty covering defects in materials and workmanship.
For technical support, spare parts, or service inquiries, please contact your authorized Bafang dealer or visit the official Bafang website for contact information.