EDLCs Excel Rechargeable Batteries For Backup Power


Panasonic has expanded its Electric Double Layer Capacitors (ELDC) capacitors which are designed to offer long life, low resistance, and rapid charge and discharge cycles over 500,000 times making them ideal for applications such as backup power supplies for servers and storage devices, solar-powered products, smart grid solutions, and driver-assist for motors and actuators in a variety of markets.

Called “Gold Capacitors” or HL series, the devices offer low resistance combined with guaranteed long life over a wide temperature range, from -40 to +85°C. The devices are guaranteed for a life of 2,000 hours at +70°C but can achieve 1,000 hours at 85°C with voltage derating.

The capacitors are wound radial lead type devices, which are claimed to achieve far better capacitance compared to aluminium electrolytic capacitors (up to 1,000 times greater) and superior charge and discharge performance compared with secondary batteries.

The HL Series adds nominal capacitance values of 2.5F, 4.5F and 7.5F to the existing 50F and 100F parts, all rated at 2.7VDC. These ELDCs are guaranteed to maintain their capacitance and internal resistance without drifting at low temperatures.


In contrast, the capacitance and internal resistance values of other available products may change by ± 30% and up to 7 times respectively from initial measured values, according to the firm.

“For power backup applications where ageing characteristics cause a rise in internal resistance and rapid decline in capacitance, EDLC capacitors are especially beneficial”, stated Panasonic.

These improvements in ageing effects, according to the firm, is attributed to the use of a unique electrolyte in the capacitors. The EDLC devices are also said to offer significant space-savings over lesser components.

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Andreas Lapucha, Product Marketing Manager Capacitors at Panasonic comments: “The extension of our HL Series within a year of its original launch testifies to the need for reliable, endurable and scalable backup solutions offering significant cost and space-saving benefits. The new leakage-safe electrolyte which does not produce any Hydrogen Cyanide gives us an edge over market competition in terms of extended temperature range and responsible environmental stewardship.”

For further details, view the full Press release.



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