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The Advantages of Ultracapacitors (Supercapacitors) for Automotive Engine Start-Stop

The Advantages of Ultracapacitors (Supercapacitors) for Automotive Engine Start-Stop

| Maxwell Technologies

The effort to meet carbon dioxide reduction targets within the next five to ten years has swept across a multitude of countries, and automakers focus on searching for ways to design new generations of vehicles that will meet emissions regulations.

One automotive system that contributes significantly to greater fuel economy is the engine start-stop feature in conventional or hybrid-electric vehicles. Instead of the car idling and burning fuel continuously, the start-stop system turns off the engine when the car comes to a full stop and restarts it when the driver releases the brake.

Ultracapacitors, also called supercapacitors, have been a contributing technology to the efficiency of the engine start-stop system. Over 4.5 million cars with start-stop systems are powered by Maxwell’s high-performance ultracapacitors.

The top advantages of Maxwell’s ultracapacitor technology for this application include the following:

ultracapacitor long service life in auto
Offers high cycling capability, resulting in long service life

ultracapacitor resilient temperature in auto
Operates from –40°C to 65°C* and resilient in ambient temperature swings

ultracapacitor improves system performance in auto
Improves system power performance and voltage stability


Provides options for smaller, light-weight energy storage modules that require less space for under-the-hood applications

ultracapacitor light weight in auto
Qualifies for high vibration and shock environments and is one of few to achieve automotive-quality certification


To learn more, see How Ultracapacitors Enhance Automotive Engine Start-Stop Performance.



*Results may vary. Additional terms and conditions, including the limited warranty, apply at the time of purchase. See the warranty details for applicable operating and use requirements.

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