6.6KW bidirectional on board charger（Liquid-cooled）
6.6kW Bidirectional On-Board Charger (Liquid-Cooled) | V2L Enabled | IP67 Waterproof | 400V–800V Architecture Support
The premium solution for high-density EV power management. Our 6.6kW Bidirectional On-Board Charger (OBC) is a fully digital, liquid-cooled power electronics unit engineered for the most demanding automotive environments. Featuring advanced bidirectional conversion technology, it allows vehicles to both charge at high speeds and discharge power back to external devices (Vehicle-to-Load). Designed for 400V and 800V architectures with a rugged IP67 rating and a high-efficiency liquid cooling plate.
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Charging Power: 6.6kW (85-265VAC Input).
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V2L Discharging: 3kVA (220VAC Output).
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Cooling: Liquid-Cooled (Flow Rate ≥ 6L/min).
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Efficiency: ≥ 94% Peak Efficiency.
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Communication: CAN-BUS 2.0B Smart Integration.
Automotive-Grade Engineering Excellence
Superior Liquid-Cooled Thermal Stability
In high-performance EVs, managing thermal loads is critical for component longevity. This 6.6kW bidirectional OBC features an integrated liquid-cooling channel designed for a flow rate of ≥ 6L/min. By utilizing the vehicle’s coolant loop, the unit maintains a stable operating temperature even under continuous full-load charging or discharging, preventing the thermal derating common in air-cooled alternatives.
Technical Expertise & Safety Integrity
Reliability in high-voltage environments is a result of precision engineering and redundant safety protocols. We prioritize Trustworthiness through:
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Bidirectional Versatility (V2L/V2G Ready): Transform your EV into a mobile power station. The integrated inverter converts high-voltage DC into a stable 220VAC (±5%) output with ultra-low harmonic distortion (THDv < 3%), safe for sensitive medical equipment, laptops, or power tools.
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Redundant Protection Architecture: 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.
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Ruggedized Ingress Protection: Rated at IP67, the unit is completely sealed against dust and high-pressure water jets, ensuring stable performance in ambient temperatures from -40°C to +85°C.
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Intelligent CAN-BUS Control: Seamlessly communicates with the BMS and VCU to execute precise charging curves while supporting online firmware upgrades and remote fault diagnosis.
Technical Specifications Table
| Category | Item | Specification |
| OBC (Charging) | Rated Power | 6.6kW |
| Input Voltage | 85-265VAC (32A Max) | |
| Output Voltage Ranges | 200V-470V / 400V-750V / 500V-850V | |
| Voltage/Current Accuracy | ± 1% / ± 2% | |
| Inverter (V2L) | Rated Power | 3kVA (≥ 94% Efficiency) |
| Output Voltage | 220VAC ± 5% (Single Phase) | |
| Dynamic Response | 60ms (Linear Load) | |
| Environment | Operating Temp | -40°C to +85°C (Coolant Inlet Temp) |
| Cooling Method | Liquid-Cooled ($\geq 6\text{L/min}$) | |
| Protection Level | IP67 | |
| Static Power | Quiescent Current | ≤ 1mA (Sleep/Shutdown) |
Frequently Asked Questions (FAQ)
Q: Why choose liquid cooling over air cooling for a 6.6kW unit?
A: Liquid cooling provides superior heat dissipation, allowing for a more compact unibody design and consistent performance in hot climates. It is essential for vehicles where space is limited and high reliability is required.
Q: Is this charger compatible with both 400V and 800V battery systems?
A: Yes. We offer three dedicated output configurations: 380VDC, 640VDC, and 750VDC, ensuring compatibility with standard 400V packs and the latest 800V high-voltage platforms.
Q: Can I use the V2L function to power household appliances?
A: Absolutely. The unit provides high-quality 3kVA AC power with low THD, making it safe for power tools, camping gear, and emergency household backup.
Q: How does the charger prevent battery drain when not in use?
A: The unit features an ultra-low static current of ≤ 1mA in sleep mode, ensuring that your vehicle’s 12V auxiliary battery remains healthy during long periods of storage.