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Power Electronics Europe News
 
Miniature automotive supercapacitor delivers fast charging

The miniature supercapacitor delivers power density and fast charging in automotive electronic applications, says the company.

The FMU supercapacitor series delivers 1,000 hours at 85°C/85% RH-rated voltage and, claims Kemet, has an industry leading operational temperature range from -40°C to 105°C. The supercapacitors are qualified to an automotive testing protocol and manufactured in an ISO TS 16949-certified plant and subjected to PPAP/PSW and change control.

Suitable automotive applications are those which require a main power system back-up during a power loss, such as ADAS (advanced driving assistance system), autonomous vehicles and central gateway ECUs (engine control units).

Supercapacitors maintain the main power system’s real-time clock or volatile memory when it is removed, such as during a power failure or when the main power system’s battery has been removed for replacement. They also offer power back-up in equipment ranging from IoT devices, smart meters, medical devices and industrial computing.

The FMU miniature supercapacitors use a proprietary aqueous electrolyte that provides high durability against liquid leakage, vibrations and thermal shock for reliability in harsh environments. Aqueous electrolytes are highly conductive, have a low environmental impact and are non-toxic and non-flammable. Unlike a battery, supercapacitors store and release energy quickly through physical adsorption and the ions desorption in the electrolyte between its electrodes.  The supercapacitor’s low internal resistance means they can fully charge within a few seconds, compared to a secondary battery cell which can take from 10 minutes to several hours to fully charge. Moreover, there is no theoretical limit to the life cycle, whereas a lithium-ion secondary cell has a finite lifetime of about 500 cycles. They also typically have a greater resistance to moisture absorption than organic compounds, for a longer life with better stability, says the company.

Kemet is a Yageo Group company. The FMU supercapacitors are available immediately via distributors.

 

 



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