New Technologies and Energy Harvesting
Murata – High-reliability long-life supercapacitors target extended temp applications (DMG EDLC)Jul 20 2012 - New Technologies and Energy Harvesting [More New Technologies and Energy Harvesting Articles]
Murata has announced the addition of the DMG series to its line of thin, low-resistance, electrical double-layer capacitors (EDLCs). The DMG supercapacitors provide high power back-up and achieve high reliability with a five-year life span at 70C, making them an ideal choice for enterprise solid state drive (SSD) manufacturers and telecom ‘last gasp’ applications. Smart meters are also a key application for the DMG series as the full operating temperature range is -30C to +85C.
The DMG series offers high voltage with very low equivalent series resistance (ESR) all within a miniaturized, yet robust package. Available in 2.1V single-cell and 4.2V double-cell options, the 2.1 V provides a nominal capacity of 700 mF with a profile of only 1.4mm and an ESR at 1kHz 70mom. The 4.2V device has a nominal capacity of 350mF at 2.8mm thickness and 130mohm ESR at 1 kHz.
The innovation behind the high-performance DMG EDLC is based on active carbon technology. Unlike traditional energy storage devices, the carbon, which is used as an electrode, without employing a chemical reaction, leads to the longer life cycle. Also, the capacitance is directly related to the surface area of the active carbon, giving the DMG series high capacitance values in a small and low profile design. Measuring only 20.5mm x 18.5mm x 1.4mm, which leads the industry in compact packaging, Murata’s EDLC series is designed for extended temperature applications.
Supercapacitors play a role in energy conservation applications, from memory backup in home appliances, mobile phones, information devices, and energy-harvesting storage systems.
The basis behind this new technology is the result of Murata’s collaborations with CAP-XX. In order to meet consumer demand for mobile devices with greater efficiency and functionality, Murata strategically acquired leading edge super cap technology from CAP-XX in 2008. Since then, Murata’s focus on EDLC research and development, coupled with CAP-XX’s expertise, has lead to the maturity of the enhanced EDLC design, says the company.More news from Murata