Dielectric film boosts capacitors to 150°C

September 08, 2021 // By Nick Flaherty
Dielectric film boosts capacitors to 150°C
Sabic has validated the performance of its ELCRES HTV150 dielectric film in DC link capacitors to 150 °C

Sabic developed the film material in response to the demand for high-voltage, high-temperature, professional-grade capacitor applications, such as traction inverters and DC-DC converters for hybrid, plug-in hybrid and battery electric vehicles (xEV).

The  addresses the critical performance gap experienced by incumbent films in the 135 °C to 150 °C operating temperature range and enables the possibility to fully deploy the power and range promise of silicon carbide (SiC) inverter technology. It operates from -40°C to +150°C with frequencies up to 100 kHz, while offering stable capacitance, high insulation resistance, stable dielectric constant (Dk) and low dissipation factor (Df).

This enables high-voltage, high-temperature DC link power capacitors that can store large amounts of electrical energy for long periods without significant leakage of current or loss of charge. The film can also potentially be used for power capacitors in mass transportation, renewable energy, aerospace, and motor drives and controls.

“Sabic is actively helping to advance the state of the art in capacitors through close collaboration with customers,” said Greg Stoddard, director, Technology & Innovation at Sabic. “This effort brings together our unique resin compounding, ultra-thin film expertise and our customers’ capacitor manufacturing experience to create solutions with enhanced capabilities. Our high-heat ELCRES HTV150 film is one example of how we are supporting the development of more powerful and efficient capacitors that address stringent requirements across multiple industries, from e-mobility to energy.”

Sabic is working with capacitor maker Xiamen Faratronic. “A critical goal in Xiamen Faratronic’s roadmap for new high-temperature DC link power capacitors is the ability to withstand disruptive hotspot temperatures up to 150°C,” said Guobin Chen, president, Xiamen Faratronic. “Sabic’s ELCRES HTV150 film is the only dielectric film to date that can meet our requirements of 150°C and high voltage.”

“Making capacitors is a very elaborate, multi-step process from metallization to assembly,” said André van Zyl, senior manager, Technology & Innovation at Sabic. “Because the process is currently optimized for biaxially oriented polypropylene films, we have turned to customers to understand the requirements to successfully replace incumbent materials with our high-temperature, high-voltage film. Collaborating with multiple customers and engineering consultants for validation has been invaluable for confirming the value of ELCRES HTV150 film as an advanced material solution that supports the next generation of high-performance xEV and other critical capacitor applications.”

Sabic says it will continue to develop thinner-gauge film to meet requirements for different voltages and higher energy density, demonstrating its continued commitment to deliver innovative material and film technologies to power electronics.

www.sabic.com

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