FastCap High Temperature Ultracapacitors

Question:

How safe are the high temp ultracapacitors?

They are safe and non-inflammable, no special restrictions for shipping .

Question:

What is the highest recorded operating temperature?

Answer:

Customers have reported brief usage above 165°C.

Question:

What is the maximum operating voltage?

Answer:

The maximum operating voltage of a High Temp Ultracapacitor depends on the operating temperature.

The following table gives maximum operating voltage at different maximum temperatures:

PRODUCT CODE CAPACITANCE (F) VOLTAGE (V) ESR (MΩ) MAX TEMP (°C) FORMAT
E100-350 370 2 8 100 D Cell
EE125-350 350 1.5 8 125 D Cell
EE150-350 345 1.0 8 150 D Cell
EE100-35 38 2 18 100 AA Cell
EE125-35 35 1.5 20 125 AA Cell
EE150-35 33 1 22 150 AA Cell

Question:

Can an Ultracapacitor enhance or replace a battery?

Answer:

The energy in the ultracapacitors is stored in the electric field whereas energy in batteries is stored in Faradaic reactions. Since the energy is in the electric field and does not wait for any chemical reactions to occur, the ultracapacitors have a unique ability to charge and discharge very quickly and can handle virtually unlimited charge-discharge cycles.


The power density of the ultracapacitor is significantly greater than the batteries. When they are connected in parallel to the batteries, they will improve the battery life and safety due to load leveling while also giving the Battery - Ultracapacitor hybrid system a high power density.

Question:

What is the failure mode?

Answer:

Gradual degradation due to internal pressure buildup and electrolyte breakdown.

Question:

How to de-rate an ultracapacitor vs temp and voltage

Answer:

The rule of thumb in de-rating ultracapacitors is that the life goes up by 2x with every 10C decrease in operating temperature or 100mv decrease in operating voltage. Contact us for specific applications.

Question:

Is the energy storage linear with voltage?

Answer:

Energy is proportional to v2.

Question:

What is the self-discharge time?

Answer:

Typical leakage current is in the range 0.5mA - 2mA. Leakage current is directly proportional to the self-discharge time.  It varies depending on the operating voltage and the temperature.