On-board-Charger 6.6KW OBC for Electric Vehicles
AC-DC Converter OBC On-board-charger (90Vac-256Vac) for Electric Vehicles: Key Functions & Applications
1. Core Functions
Voltage Step-Down: Converts high-voltage traction battery power (90Vac-256Vac) to stable 250Vdc -470Vdc.
Energy Efficiency: Typically achieves >94% efficiency ( LLC resonant topology).
| Technical Specification | Value |
|---|---|
| Input Voltage | 90Vac-256Vac |
| Output Voltage | 250Vdc -470Vdc |
| Max Output Current | 21A |
| Rated Power | 6.6KW |
| Maximum Power | 6.6KW |
| Peak Efficiency | >94% |
| Protection Rating | IP20 (Water-Cooling) |
| Communication Interface | CAN2.0 |
| Dimensions (L×W×H) | 288×200×64mm |
| Unit Weight | 5KG |
2.What is OBC and why Choose 6.6KW OBC?
2.1,Why Choose 6.6KW OBC?
A 6.6KW OBC offers the ideal balance of speed, cost, and compatibility for most EVs. Here’s why it’s the industry standard:
1. Faster Charging vs. Lower Power Options
| OBC Power | Charging Time (0→100% for 60kWh Battery) | Use Case |
|---|---|---|
| 3.3KW | ~18 hours | Low-cost EVs/slow overnight |
| 6.6KW | ~9 hours | Mainstream EVs (e.g., Nissan Leaf) |
| 11KW+ | ~5.5 hours | Premium/long-range EVs |
Example: A 6.6KW OBC adds ~40km range per hour (vs. 20km at 3.3KW).
2. Cost-Effectiveness
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Infrastructure Compatibility: Works with widespread Level 2 AC chargers (208–240V, 30A circuits).
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Lower Upfront Cost: 11KW+ OBCs require expensive 3-phase power and heavier cables.
3. Thermal & Weight Efficiency
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Heat Management: 6.6KW generates less heat than 11KW+ units, reducing cooling needs.
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Space-Saving: Lighter/smaller than high-power alternatives (e.g., Tesla’s 11KW OBC weighs 2× more).
4. Market Standardization
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Adopted by Major OEMs: Nissan, Chevrolet, Hyundai use 6.6KW for mass-market models.
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Aftermarket Support: Easier to replace/upgrade due to broad compatibility.
2.2 When to Choose Higher/Lower Power?
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3.3KW: Budget EVs/short-range urban vehicles (e.g., Wuling Hongguang Mini EV).
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11KW+: Luxury/long-range EVs (e.g., Tesla Model S) with 3-phase power support.
4. Keywords for Technical Documentation
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“6.6KW OBC”
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“On-Board Charger 6.6KW”
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“EV Charger 6.6KW”
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“AC-DC Converter for Electric Vehicles”
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“Level 2 EV Charging Module”
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