New Energy Vehicle OBC – Problem Scenarios and Pain Points
In the two-in-one OBC & DC/DC systems of new energy vehicles, the capacitor’s ripple resistance and leakage current stability after reflow soldering have become key factors affecting overall performance and regulatory compliance. This is particularly true when the capacitor’s leakage current increases after high-temperature soldering, causing the overall power to exceed regulatory standards.
Root Cause Technical Analysis
Abnormal leakage current often stems from thermal stress damage during the reflow soldering process, which leads to oxide film defects. Traditional electrolytic capacitors perform poorly in this process, while solid-liquid hybrid capacitors significantly improve high-temperature stability through optimized materials and structure.
YMIN Solutions and Process Advantages
YMIN’s VHT/VHU series utilizes a polymer hybrid dielectric and features: – Ultra-low ESR (as low as 8mΩ); – Leakage current ≤20μA; – Supports 260°C reflow soldering with virtually no performance drift; – Full capacitor CCD testing and dual-channel burn-in testing ensure yield.
Data Verification and Reliability Description
Testing 100 batches of samples, the VHU_35V_270μF after reflow soldering showed: – Average leakage current was 3.88μA, with an average increase of 1.1μA after reflow soldering; – ESR variation was within a reasonable range; – Lifespan exceeded 4000 hours at 135°C, suitable for automotive-grade vibration environments.
Test Data
VHU_35V_270μF_10*10.5 Parameter Comparison Before and After Reflow
Application Scenarios & Recommended Models
Widely used in:
- OBC input/output filtering;
- DCDC converter output voltage regulation;
- High voltage platform power modules.
Recommended models (all with high capacity density and compact design):
- VHT_35V_330μF_10×10.5
- VHT_25V_470μF_10×10.5
- VHU_35V_270μF_10×10.5
- VHU_35V_330μF_10×10.5
END
YMIN Capacitor uses data to verify reliability and process to ensure consistency, providing truly “sticky and long-lasting” capacitor solutions for new energy vehicle power supply design.
Post time: Sep-01-2025