Littelfuse Unveils Advanced Overtemperature Detection Solution for Electric Vehicle Li-ion Battery Packs

TTape Distributed Temperature Monitoring Platform

TTape revolutionizes the EV industry by delivering a unique capability to detect overtemperature at every Li-ion cell, offering superior safety and battery life enhancement.

CHICAGO, January 11, 2024 -- Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable, connected, and safer world, is excited to introduce TTape™, a groundbreaking overtemperature detection platform designed to transform the management of Li-ion battery systems. With its innovative features and unparalleled benefits, TTape helps vehicle systems manage premature cell aging effectively while reducing the risks associated with thermal runaway incidents. View the video.

TTape is ideally suited for a wide range of applications, including automotive EV/HEVs, commercial vehicles, and Energy Storage Systems (ESS). Its distributed temperature monitoring capabilities enable superior detection of localized cell overheating, thereby improving battery life and enhancing the safety of battery installations.

TTape’s key benefits and differentiators include:

  • Premature Cell Aging Management: TTape aids vehicle systems in managing premature cell aging, significantly reducing the risks associated with thermal runaway.
  • Extended Battery Pack Life: TTape ensures that the battery pack remains serviceable for an extended period by initiating temperature management at an earlier stage.
  • Efficient Multi-cell Monitoring: With a single TTape device, multiple cells can be monitored, thus alerting the BMS sooner in case of overtemperature scenarios.
  • Ultra-fast Response: With a response time of less than one second, TTape guarantees quicker alerts, signaling the potential onset of thermal runaway conditions.
  • Seamless Integration: Calibration isn’t necessary. TTape can easily integrate with existing BMS, making it a go-to solution for many battery applications.

Moreover, the extremely thin design of TTape makes it ideal for conformal installations. With a single MCU input, its distributed temperature monitoring capability drastically improves the detection of localized cell overheating. This approach enables efficient cooling measures to prolong battery life and significantly heightens the safety standards of battery installations.

“Distinguishing itself from NTCs, TTape is a stellar addition to the Littelfuse product family. The profound advantage of localized cell overheating detection ensures quicker alerts to the BMS compared to traditional NTC setups," explained Tong Kiang Poo, Global Product Manager at Littelfuse. "The TTape Platform is a distributed temperature monitoring device for battery packs that helps to improve the detection of localized cell overheating. With no calibration or temperature lookup tables required, and only one MCU input needed, it integrates seamlessly with current BMS solutions alongside NTCs, delivering an enhanced detection of cell overheating.”

This groundbreaking product builds upon the Littelfuse legacy of innovation. It leverages the company's research, design, and development expertise in PPTCs, bringing forth a temperature monitoring solution that the industry eagerly awaits.

TTape promises to be a game-changer for the Li-ion battery pack market, emphasizing safety and efficiency. As the industry moves rapidly towards more sustainable and safe energy solutions, Littelfuse products like TTape are a testament to the company's commitment to innovation and excellence.


The TTape Distributed Temperature Monitoring Platform is available in tape and reel or box packaging, depending on the length required. Place sample requests through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit

For More Information

For more in-depth technical information, visit the TTape Distributed Temperature Monitoring Platform product page. To schedule an appointment to discuss your application, please contact Tong Kiang Poo, Global Product Manager, EBU

About Littelfuse

Littelfuse is a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 20 countries, and with approximately 18,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation, and electronics end markets—everywhere, every day. Headquartered in Chicago, Illinois, United States, Littelfuse was founded in 1927. Learn more at