2-in-1 On-Board Charging System (OBC DC/DC)
Combining on-board charger and DC-to-DC converter
The 2-in-1 on-board charging system, also known as an integrated OBC (on-board charger) and DC-DC converter, is an electric vehicle charging solution that combines two essential functions: converting AC power to DC for efficient battery charging, while also stepping down high-voltage power to lower voltage levels for the vehicle’s electrical systems. By integrating these two systems into a single unit, it simplifies vehicle architecture, reduces space and weight requirements, and improves overall power management efficiency for modern EVs.
The OBC (on-board charger) is responsible for charging the vehicle's battery. It connects to the power grid through an AC charging port or station, converting the AC power into DC to charge the high-voltage battery.
The DC-DC converter, on the other hand, steps down the high-voltage DC power from the vehicle’s main battery into low-voltage DC, which powers low-voltage components like the audio system, lighting, and other electronics. It also provides electrical isolation, ensuring enhanced safety by separating the high-voltage and low-voltage systems within the vehicle.
- OBC power: 1kW-22kW
- DC/DC power: 300W-6000W
- Cooling method: natural cooling/air cooling/liquid cooling
- Bidirectional charging
The 2-in-1 on-board charging system is designed to maximize power density, optimize space, and reduce overall system costs, all while enhancing safety and reliability. This integrated power system not only improves charging efficiency of electric vehicles but also comes with comprehensive protection features to ensure safe operation.
The system uses a liquid cooling design that meets automotive-grade standards, ensuring resistance to vibration, water ingress, and electromagnetic interference (EMC). This design guarantees the system's stability and durability, making it ideal for long-term use in electric vehicles, even under challenging conditions.
This combination of advanced features ensures efficient, reliable, and safe performance, catering to the high demands of modern EV systems.
| Model | ||||
| Nominal Output Voltage of OBC (V) | 72V | 108V | 144V | 312V |
| Output Voltage Range of OBC (V) | 50V-107V | 80V-161V | 95V-202V | 200V-450V |
| Max. Output Current of OBC (A) | 40A | 32A | 23A | 10A |
| Input Voltage Range of DC/DC (V) | 44V-97V | 74V-162V | 103V-227V | 206V-454V |
| Nominal Output Voltage of DC/DC (V) | 14V | 14V | 14V | 14V |
- Input voltage range: AC90V-264V
- Frequency: 45Hz-65Hz
- Power factor: ≥0.99
- Full load efficiency: ≥93%
- Mechanical impact and vibration grade: QC/T 895-2011
- Protection level: IP67
- Operating temperature: -40℃ to 85℃
- Storage temperature: -40℃ to 105℃
- Communication: CAN bus
- Functions: output over-voltage/overcurrent/short circuit/reverse polarity protection, input undervoltage/over-voltage protection, over-temperature protection
- Nominal power: 1kW
- Peak power: 1.2kW lasting 6 minutes
- Output voltage/current: 14V±1% / 72A
- Max. efficiency: ≥95%
- Voltage regulation: 1%
- Voltage control accuracy: ≤1%
- Current control accuracy: ≤2%
- Operating temperature: -40℃ to 60℃
- Storage temperature: -40℃ to 105℃
- Communication: CAN bus/12V Enable Signal Control
- Functions: output over-voltage/undervoltage/short circuit protection, input reverse polarity protection, over-temperature protection, communication protection
- Dimensions (L×W×H): 260×244×95mm
- Cooling method: air cooling, water cooling
| Model | Nominal Output Voltage of OBC (V) | Output Voltage Range of OBC (V) | Max. Output Current of OBC (A) | Input Voltage Range of DC/DC (V) | Nominal Output Voltage of DC/DC (V) | Max. Output Current of DC/DC (A) | Dimensions (L×W×H) | Net weight |
| 144V | 95V-202V | 23A | 100V-200V | 14V | 110A | 244x316.6x68 | 5.8kg | |
| 312V | 200V-450V | 10A | 206-454V | 14V | 110A |
| Model | Nominal Output Voltage of OBC (V) | Output Voltage Range of OBC (V) | Max. Output Current of OBC (A) | Input Voltage Range of DC/DC (V) | Nominal Output Voltage of DC/DC (V) | Max. Output Current of DC/DC (A) | Dimensions (L×W×H) | Net weight |
| 144V | 95V-202V | 46A | 100V-200V | 14V | 110A | 290.3x380x87mm | 8.7kg | |
| 312V | 200V-450V | 20A | 206-454V | 14V | 110A |
| Model | Nominal Output Voltage of OBC (V) | Output Voltage Range of OBC (V) | Max. Output Current of OBC (A) | Input Voltage Range of DC/DC (V) | Nominal Output Voltage of DC/DC (V) | Max. Output Current of DC/DC (A) | Dimensions (L×W×H) | Net weight |
| 144V | 95V-202V | 46A | 100V-200V | 14V | 110A | 290.3x380x87mm | 8.7kg | |
| 312V | 200V-450V | 20A | 206-454V | 14V | 110A |
| Model | Nominal Output Voltage of OBC (V) | Output Voltage Range of OBC (V) | Max. Output Current of OBC (A) | Input Voltage Range of DC/DC (V) | Nominal Output Voltage of DC/DC (V) | Max. Output Current of DC/DC (A) | Dimensions (L×W×H) | Net weight |
| 312V | 200V-450V | 20A | 206-454V | 14V | 143A | 281×373×115mm | 8.8kg |
| Model | |
| Nominal Output Voltage of OBC (V) | 312V |
| Output Voltage Range of OBC (V) | 200V-450V |
| Max. Output Current of OBC (A) | 20A |
| Input Voltage Range of DC/DC (V) | 206-454V |
| Nominal Output Voltage of DC/DC (V) | 14V |
The 2-in-1 on-board charging system (OBC DC/DC) is an ideal solution for various electric vehicle applications, including passenger cars, commercial vehicles, and off-road vehicles. It simplifies the vehicle's architecture by combining both the charging and power conversion functions, optimizing space and reducing costs. This system efficiently manages power distribution and charging, ensuring reliable performance in demanding environments, from urban roads to industrial sites.
