Capacitor Solution for New Energy Vehicle (NEV) On-Board Chargers & DC/DC
1. Solution Introduction
The automotive environment is one of the most challenging for electronic components. On-Board Chargers (OBCs) and DC/DC converters in electric vehicles demand components that can withstand extreme temperatures, constant vibration, and high electrical stress, all while meeting stringent safety and reliability standards. This solution leverages Jianghai's automotive-grade (AEC-Q200) capacitors to deliver a robust, reliable, and compact power conversion solution for EVs.
2. Solution Block Diagram
Fig. 1: Key capacitor placements in a modern EV OBC architecture.
3. Core Advantages of this Solution
- Automotive Grade Reliability: All recommended key components are qualified to the AEC-Q200 standard, ensuring they meet the rigorous demands for temperature, humidity, and vibration resistance.
- High Power Density: Utilizes both miniaturized electrolytic capacitors and high-performance DC-Link film capacitors to achieve a compact design, which is critical for saving space and weight in an EV.
- Enhanced Safety: Employs certified X and Y safety capacitors for EMI filtering to ensure the vehicle meets international safety and electromagnetic compatibility (EMC) standards.
- Thermal Management: The chosen capacitors have excellent thermal characteristics, with low ESR to minimize self-heating, a crucial factor in sealed automotive power modules.
4. Recommended Bill of Materials (BOM)
| Function | Recommended Series | Key Benefits | Link |
|---|---|---|---|
| DC-Link Filtering (PFC Stage) | Jianghai Automotive Film Caps | AEC-Q200, High Temp, Low ESR | Consult FAE |
| Auxiliary Power & Gate Drive | Jianghai Automotive Electrolytic Caps | AEC-Q200, Vibration Resistant, 125°C option | Consult FAE |
| EMI Filtering (AC Input) | Jianghai X/Y Safety Film Caps | AEC-Q200, Safety Certified (UL/VDE) | Consult FAE |
Note: Automotive design requires strict adherence to standards. The "Automotive" series from Jianghai contains numerous specific part numbers. Please contact our FAEs to discuss your specific power level, voltage, and layout requirements to receive a compliant BOM.