11KW bidirectional on board charger
The high-performance heart of next-generation energy management. Our 11kW Bidirectional On-Board Charger (OBC) is a fully digital, liquid-cooled power electronics unit engineered for the most demanding automotive environments. By utilizing advanced thermal dissipation and bidirectional conversion technology, it allows vehicles to not only charge at high speeds but also discharge power back to external devices (V2L) or the electrical grid (V2G). Designed for 400V and 800V architectures with a rugged IP67 rating.
-
Charging Power: 11kW (3-Phase AC Input).
-
Discharge Power (V2L/V2G): Up to 11kVA Bidirectional.
-
Efficiency: ≥ 95% Peak Efficiency.
-
Cooling: Integrated Liquid Cooling (Water/Glycol).
-
Protection: IP67 Sealed Aluminum Unibody.
Technical Excellence in Thermal Management
Superior Liquid-Cooled Thermal Stability
In high-performance EVs, managing thermal loads during 11kW continuous charging is critical for component longevity. This 11kW bidirectional OBC features an integrated liquid-cooling baseplate designed for optimal flow rates. By utilizing the vehicle’s coolant loop, the unit maintains a stable operating temperature even under sustained full-load operation, preventing the thermal derating common in air-cooled alternatives and allowing for a significantly more compact installation footprint.
Engineering Expertise & Safety Integrity
Reliability in high-voltage environments is a result of precision engineering and rigorous safety protocols. We prioritize Trustworthiness through:
-
Bidirectional Versatility (V2G/V2L Ready): Transform your EV into a mobile energy storage system. The integrated inverter provides high-quality AC output with ultra-low harmonic distortion (THDv < 3%), making it safe for sensitive home electronics, medical devices, or grid stabilization projects.
-
Next-Gen SiC Architecture: Utilizing Silicon Carbide (SiC) MOSFETs, our 11kW unit achieves higher switching frequencies and lower energy losses, resulting in a $\geq 95\%$ efficiency rating that directly translates to faster charging and less waste heat.
-
Redundant Protection Suite: Built with a fully digital software design, the unit includes hardware-level safeguards for input/output over-voltage, under-voltage, over-temperature, and short-circuit protection.
-
Intelligent CAN-BUS Control: Seamlessly communicates with the BMS and VCU via CAN 2.0B to execute precise charging curves while supporting online firmware upgrades and remote fault diagnosis.
Technical Specifications Table
| Category | Item | Specification |
| OBC (Charging) | Rated Power | 11kW (3-Phase 304V–456VAC) |
| Output Voltage Ranges | 200V-500V (400V Pack) / 450V-850V (800V Pack) | |
| Max Efficiency | ≥ 95% | |
| Bidirectional (V2X) | Rated Power | 11kVA (Grid/Load Support) |
| Output Voltage | 230VAC (1-Phase) / 400VAC (3-Phase) Options | |
| Dynamic Response | ≤60ms | |
| Environment | Operating Temp | -40°C to +85°C |
| Cooling Method | Liquid-Cooled (Water/Glycol Mix) | |
| Protection Level | IP67 | |
| Static Power | Quiescent Current | ≤ 1mA (Sleep Mode) |
Frequently Asked Questions (FAQ)
Q: Why is liquid cooling essential for an 11kW bidirectional unit?
A: At 11kW, the heat generated during power conversion is substantial. Liquid cooling provides the most efficient heat transfer, allowing the unit to maintain peak power without “throttling” or overheating, even in hot climates or enclosed engine bays.
Q: Does this charger support 800V vehicle platforms?
A: Yes. We offer a dedicated high-voltage configuration supporting up to 850VDC output, making it fully compatible with the latest ultra-fast charging architectures used by premium EV manufacturers.
Q: What is the difference between V2L and V2G in this unit?
A: This unit supports both. V2L (Vehicle-to-Load) allows you to power appliances directly from the car (e.g., camping gear). V2G (Vehicle-to-Grid) allows the vehicle to feed energy back into the home or utility grid to balance energy demand.
Q: How does the IP67 rating protect the hardware?
A: The IP67 rating ensures the charger is completely dust-tight and can survive temporary immersion in water. This is vital for long-term durability against road salt, heavy rain, and high-pressure vehicle washes.