1. Power Rating: Matching Charge Speed with Battery Capacity

A 6.6kW OBC is the ideal choice for Wuling Journey MPV conversion, offering a balanced charging speed suitable for daily use. With electric drive systems typically operating on a high-voltage DC platform, the OBC must provide sufficient current to efficiently charge the battery—typically completing a charge in 4-6 hours depending on battery capacity. This power level is compatible with Level 2 charging stations, making it suitable for both home and public charging.

2. CAN Communication: The Heart of System Integration

The electric drive system relies on CAN bus protocol to monitor and control motor, controller, and thermal management data. Therefore, your OBC must support CAN communication to interact with the vehicle's existing network. This enables:

Ensure the OBC supports standard CAN protocols and can be configured to match the vehicle's CAN identifier structure. Some advanced OBCs allow custom CAN message mapping, which is essential for seamless integration.

3. Input and Output Specifications

The OBC should have:

• AC Input: 220V AC, 50Hz, single-phase (compatible with most regional standards)
• DC Output: Adjustable voltage range to match battery operating window
• Maximum Output Current: Approximately 17A

Confirm that the OBC can automatically detect charging cable capacity and supports safety features like ground fault detection and overcurrent protection.

4. Efficiency and Thermal Management

Look for an OBC with efficiency ≥94% to minimize energy loss during conversion. Given that powertrains often use liquid cooling, consider OBCs with integrated liquid cooling or at least IP67-rated enclosures for dust and water resistance. If liquid cooling isn't feasible, ensure the OBC has robust fan cooling and thermal derating to prevent overheating in enclosed spaces.

5. Protection Features and Durability

The OBC must meet IP67 protection rating to resist moisture and dust, especially when mounted in the cabin or under-chassis. It should also include:

• Overvoltage, overcurrent, and short circuit protection
• Reverse polarity protection
• Insulation monitoring
• Certification to automotive safety standards

6. Physical Dimensions and Installation

The Wuling Journey MPV has limited space, so choose a compact, lightweight OBC that fits available space (e.g., front compartment, under seats). Ensure adequate clearance for heat dissipation and cable routing. Mounting brackets or rubber isolators help reduce vibration stress.

7. Compatibility with Battery and BMS

The OBC must communicate effectively with the Battery Management System to follow charging curves, monitor cell voltage and temperature, and prevent overcharging. Confirm the OBC supports BMS handshake protocols via CAN and that charging automatically stops when SOC reaches 100% or temperature exceeds safety limits.

8. Safety Certifications and Reliability

Choose OBCs with relevant certifications indicating compliance with EMC and safety regulations. Given the vehicle's long design life, prioritize proven industrial-grade or automotive-grade products over consumer-grade adapters.

9. Ease of Installation and Diagnostic Features

A user-friendly OBC should offer:

• Clear terminal markings
• Built-in diagnostic ports for troubleshooting
• LED indicators for power, charging, and fault status
• Support for remote monitoring via apps or cloud platforms

10. Brand and Technical Support

Choose from reputable manufacturers specializing in EV conversion components. Look for products with detailed technical documentation, firmware update support, and responsive customer service.