44KW bidirectional on board charger
The pinnacle of EV power electronics. Our 44kW Bidirectional On-Board Charger (OBC) is a heavy-duty, liquid-cooled solution designed for high-capacity battery architectures in electric buses, trucks, and premium passenger vehicles. Featuring a dual-mode 3-phase design, it delivers up to 44kW of charging power and 6kVA of bidirectional discharge, transforming the vehicle into a high-capacity mobile energy storage system.
-
Charging Power: 3-Phase 44kW / Single-Phase 6.6kW.
-
Discharge Power (V2L/V2G): 6kVA (220VAC Output).
-
Cooling: Advanced Liquid Cooling (Flow Rate ≥ 15L/min).
-
Voltage Support: Compatible with 400V, 600V, and 800V architectures (Up to 860VDC).
-
Communication: High-Speed CAN-FD Interface.
Industrial Authority in Mega-Watt Era Charging
Industry-Leading 44kW Power Density
As EV battery packs grow in capacity, charging speed becomes the ultimate operational metric. Our 44kW OBC utilizes a sophisticated 3-phase four-wire architecture, allowing commercial fleets to achieve DC-like charging speeds using standard AC infrastructure. With a peak efficiency of $\geq 94\%$, it minimizes thermal waste and maximizes energy throughput, significantly reducing vehicle downtime.
Engineering Expertise & Functional Safety
In the high-power domain, reliability is a product of redundant engineering. We prioritize Trustworthiness through:
-
Advanced V2X Bidirectional Capability: This unit supports Vehicle-to-Load (V2L) and Vehicle-to-Grid (V2G). It provides a stable 220VAC (± 5%) output with ultra-low harmonic distortion (THDv < 3%), capable of powering heavy industrial tools or stabilizing local micro-grids.
-
Precision Thermal Management: Featuring a dedicated liquid-cooling baseplate with a recommended flow rate of ≥ 15L/min, the unit maintains optimal junction temperatures even during continuous 44kW operation. This ensures a consistent power curve and protects the internal SiC/IGBT modules from thermal aging.
-
CAN-FD Smart Integration: Utilizing the CAN-FD protocol, the OBC offers higher bandwidth for real-time data exchange with the BMS and VCU. It supports online firmware upgrades, proactive fault diagnosis, and parallel expansion for even higher power requirements.
-
Automotive-Grade Protection: Encased in an IP67-rated aluminum unibody, the charger is completely sealed against dust and water. It includes hardware-level safeguards for input/output over/under voltage, over-temperature, and output short-circuit protection.
Technical Specifications Table
| Category | Item | Specification |
| OBC (Charging) | Rated Power | 3-Phase 44kW / Single-Phase 6.6kW |
| Input Voltage | 150V–456VAC (3-Phase) / 85V–265V (1-Phase) | |
| Max Input Current | 63A Max | |
| Output Voltage Ranges | 190V–500V / 400V–750V / 400V–860V | |
| Inverter (V2L/V2G) | Rated Power | 6kVA |
| Output Voltage | 220VAC ± 5% / 50Hz | |
| Dynamic Response | 60ms (Linear Load) | |
| Environment | Operating Temp | -40°C to +85°C (Coolant Inlet Temp) |
| Protection Level | IP67 | |
| Communication | Protocol | CAN-FD |
Frequently Asked Questions (FAQ)
Q: Can this 44kW OBC charge from a single-phase source?
A: Yes. While optimized for 3-phase 44kW charging, the unit is fully compatible with single-phase 240V inputs, providing a derated output of 6.6kW, ensuring the vehicle can charge at any standard AC station globally.
Q: Is it compatible with 800V battery architectures?
A: Absolutely. We offer a high-voltage configuration with an output range of 400V–860VDC, specifically designed for the latest generation of ultra-fast charging 800V platforms.
Q: What are the benefits of CAN-FD over standard CAN-BUS?
A: CAN-FD (Flexible Data-rate) provides significantly higher data throughput. This allows for more precise monitoring of the charging curve and faster communication between the OBC and BMS, which is critical for managing the high currents involved in 44kW charging.
Q: Does the unit support parallel operation?
A: Yes. Our fully digital software design supports parallel expansion, allowing multiple units to be integrated into a single vehicle system for even higher power requirements (e.g., 88kW).