FAQ

Q How can we calculate energy of Ultracapacitor in Wh?
A
You can calculate energy of Ultracapacitor in J(Joule) through below energy equation for Ultracapacitor

EMAX(J)=1/2CV2 (EMAX: Maximum energy of Ultracapacitor / C: Capacitance of cell or module / V: Rated voltage of cell or module)

EAVAILABLE(J)1/2C(VMAX2-VMIN2) (EAVAILABLE: Available energy of Ultracapacitor / C: Capacitance of cell or module / VMAX/MIN: Maximum or minimum voltage of cell or module)

As 1J=1Ws, energy in Joule fan be can convert to Wh by dividing them in 3600.


ex)LSUC 002R7C 3000F EA

C : the capacitance (F) VR :  the rated voltage (V)



Q What are things to be noticed while charging the Ultracapacitor for test?
A
Try to reduce each cell’s voltage variance when using in series or parallel. Also, be careful with polarity change of each cells.




Q What kind of protective or monitoring function does the LS Ultracapacitor modules have?
A
Balancing circuit of module minimized variance between cells inside the module and protect overcharging of each cells. Furthermore, OVA(Over-voltage alarm) & OTA(Over-temperature alarm) function is available.



Q Is Ultracapacitor dangerous regarding ACN(Acetonitrile)?
A

ACN(Acetonitrile) is one of material used as electrolyte of Ultracapacitor. Electrolytes are absorb in electrode and sealed in housing of cell for safety.

However, ACN(Acetonitrile) has concerns about the harmfulness from the flammable property or side-reaction gas from a misuse.


Q Is long product life (1 million cycle life or 10 years calendar life) really possible?
A
Long term product life forecast is based on accelerated life test conditions. Produce life is accelerated in higher temperature or operating voltages and accelerated test conditions are based on the accelerating relationship between mentioned factors. 1 million cycle life for cylindrical cells, 0.5 million cycle life for medium size cells and 10 years calendar life at 25 is based on our accelerated life test conditions.




Q What is self-discharge characteristic of the Ultracapacitor? And how long is the charged state maintained?
A

The product self-discharge rate may different by initial charge state and temperature (condition) of the product. Please "contact us" for further details





Q What is advantage of Ultracapacitor over batteries?
A
Below are advantage of Ultracapacitor over batteries


Parameters 

 Ultracapacitor

 Rechargeable Battery

 Discharge rate

 1 ~ 30 sec

 0.3 ~ 4 hrs

 Charge rate

 sec ~ min

 0.5 ~ 5 hrs

 Energy Density (Wh/kg)

 1 ~ 10

 30 ~ 100

 Power Density (W/kg)

 1,000 ~ 2,000

 50 ~ 200

 Charge/Discharge Efficiency

 0.9 ~ 0.95

 0.7 ~ 0.85

 Cycle life

 >500,000

 500 ~ 2,000

 Operating Temp.

 -40℃ ~ 65℃

 0℃ ~ 40℃





Q How does temperature and voltage effect on product life?
A

According to Arrhenius Equation commonly cited in Ultracapacitor, for every 10 drop of operational temperature, the product life becomes approximately double if all other conditions being equal. Likewise for every 0.1 V drop, the product life extends about double.


Q What is Ultracapacitor? What features does it have?
A

Ultracapacitor energy storage device with high power, wide operating temperature and excellent reliability.





Q What makes LS Ultracapacitor different from the products of other companies?
A
LS Ultracapacitor is leading the market with state of art technologies. 3.0V highest level of Ultracapacitor voltage level had been achieved since 2011 and released lug type product recently. We are developing its technology to meet diverse needs of customers including low resistance (0.23mΩ) suitable for high power applications.

LS is keeping high level of product quality through cutting-edge quality control system.




1 2 3