Datasheet

使 Application Guidelines
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Index
使用指南 Application Guidelines
(EDLC) 使
This document provides basic guidelines for application development using capacitors, also known as EDLC.
If questions arise during your development process and are not answered in the document, please contact us
directly.
Life Time
EDLCEDLC
(ESR) /
ESR
EDLC鋁殼使
EDLCESR
EDLC has a longer life time than secondary batteries, but their life time is not infinite. The basic end-of-
life failure mode for an EDLC is an increase in equivalent series resistance (ESR) and/or a decrease in
capacitance. The actual end-of-life criteria are dependent on the application requirements. Prolonged
exposure to elevated temperatures, high applied voltage and excessive current will lead to increased ESR and
decreased capacitance. Reducing these parameters will lengthen the life time of a supercapacitor. In general,
cylindrical EDLC have a similar construction to electrolytic capacitors, they have a liquid electrolyte inside an
aluminum can sealed with a rubber bung. Over many years, the EDLC will dry out, similar to an electrolytic
capacitor, causing an increase in ESR and eventually end-of-life.
Voltage
EDLC使
使EDLC
EDLC
EDLC are rated with a nominal recommended working or applied voltage. The values provided are set for long
life at their maximum rated temperature. If the applied voltage exceeds the recommended voltage, the life time
will be reduced. If the applied voltage is excessive for a prolonged time period, gas generation will occur inside
the EDLC and may result in leakage or rupture of the safety vent. However, short-term over voltage can usually
be tolerated by the EDLC.