Introduction
In electric vehicle thermal management systems, actuators such as electronic water pumps, oil pumps, and cooling fans often operate in high-temperature and high-vibration environments. Traditional aluminum electrolytic capacitors are prone to control board malfunctions and even system failure due to increased ESR and insufficient ripple tolerance.
YMIN Solution
Capacitors experience electrolyte drying and oxide layer degradation in high-temperature environments, leading to increased ESR, capacitance degradation, and leakage current. Especially in high-frequency switching power supplies, ripple current-induced heating further accelerates aging.
The VHE series utilizes a next-generation polymer hybrid dielectric and electrode structure design to achieve:
Low ESR: The new VHE series maintains an ESR value of 9-11 mΩ (better than the VHU with less fluctuation), resulting in lower high-temperature losses and more consistent performance.
High Ripple Current Capacitance: The VHE series’ ripple current handling capability is over 1.8 times higher than the VHU, significantly reducing energy loss and heat generation. Efficiently absorbs and filters the high-intensity ripple current generated by the motor drive, effectively protecting the actuator, ensuring continuous and stable operation, and effectively suppressing voltage fluctuations from interfering with surrounding sensitive components.
High-Temperature Resistance
4000 hours of service life at 135°C and supports harsh ambient temperatures up to 150°C; easily withstands the harshest working medium temperatures in the engine compartment.
High Reliability
Compared to the VHU series, the VHE series offers enhanced overload and shock resistance, ensuring stable operation under sudden overload or shock conditions. Its excellent charge and discharge resistance easily adapts to dynamic operating scenarios such as frequent start-stop and on-off cycles, ensuring a long service life.
Reliability Data Verification & Selection Recommendations
Test data shows that the VHE series surpasses international competitors in multiple performance indicators:
ESR is reduced to 8–9mΩ (typical);
Ripple current capability reaches 3500mA at 135°C;
Surge voltage withstand reaches 44V;
Capacitance and ESR variation are minimized over a wide temperature range.
- Application Scenario and Recommended Models -
The VHE series is widely used in thermal management controllers (water pumps/oil pumps/fans) and motor drive circuits.
Recommended models cover multiple capacity specifications from 25V to 35V, are compact in size, and offer strong compatibility.
Take the VHE 135°C 4000H as an example:
Conclusion
YMIN’s VHE series significantly improves capacitor performance in high-temperature, high-ripple environments through innovative materials and structures. It provides a highly reliable solution for new energy vehicle thermal management systems, helping the industry move toward a more efficient and stable next-generation electronic architecture.
Post time: Sep-22-2025