ULTIMO Lithium Ion Capacitor Prismatic Cells

ULTIMO is an electricity storage device with both high energy density and high power density features and can be charged and discharged at a high current. Ensuring a high degree of safety and excellent performance through life, they feature little self-discharge and have a wide operation temperature range.

ULTIMO cells can be used in mobile applications such as energy recuperation in cars, buses, light rail vehicles (LRV), trams and other commercial vehicles. They also contribute to performance improvement of stationary systems such as backup storage, peak assist, power quality, electricity storage, and the like.

Prismatic cells are thin, robust, lightweight, compact, safe in use and show excellent thermal behavior, resulting in a wide spectrum of applications. This design excels in heat radiation efficiency and ease of implementation in comparison with common cylindrical type.

Parameter CPQ2300S
2300 F ULR
CPP3300S
3300 F
Conditions
Operating temperature range -30C~70C -30C~70C  
Rated Voltage Maximum 3.8V 3.8V  
Minimum 2.2V 2.2V  
Initial
Characteristics
Capacitance 2300F 3300F 10CA CC discharge at 25C
ESR 0.6mO 0.5mO 1kHz
DC-IR 0.7mO 1.0mO 10CA CC discharge at 25C
Energy density 8Wh/kg 13Wh/kg 10CA CC discharge at 25C
15Wh/L 20Wh/L
Temperature
Performance
-20C Capacitance
ratio(vs 25C)
90% 90% 10CA CC discharge
70C 100% 100%
Self Discharge Voltage drop < 5% < 5% After 3 months at 25C
Cell size   150x91.5x15.5mm 150x91.5x15.5mm Without terminal

These values are typical ones, which are subject to change without notice.

Cycle life performance

Test condition: Charge: CC 200 A to 3.8 V; discharge: CC 200 A to 2.2 V; no rest times between charging and discharging, CPQ2300S (prismatic cell 2300F ULR)

After a charge-discharge operation of over 1 million cycles at 100% of the operation Voltage range (100% DOD), the cell capacity retention is still higher than 90%.

An ULTIMO cell can be operated at a cell voltage higher than that of an electric double layer capacitor and has excellent high temperature durability. This characteristic is achieved by a design that uses the pre-doping process to lower the potential of the negative electrode and thereby to restrict an increase in the potential of the positive electrode; at the same time, this suppresses the deterioration of the negative electrode, resulting in high durability even after repetition of charge-discharge cycles.

Combining Energy with Power

Test condition: Charge: CCCV 10 A to 3.8 V; discharge: CC 10~480 A to 2.2 V, ambient temperature CPP3300S (prismatic cell 3300F LR)

ULTIMO cells can achieve an energy density of 13 Wh/kg.


Load life performance

Test condition: Constant voltage: 3.8 V in an ambient temperature of 70C CPQ2300S (prismatic cell 2300F ULR). After six months of operation at maximum temperature and maximum Voltage, no noticeable deterioration has been observed.


Safety test results of laminate ULTIMO cell

ULTIMO cells have been tested in accordance to different industrial standard, such as UL and UN. They did neither burn, nor explode in any of overcharge, over-discharge, and external short-circuit tests, proving their excellent safety.

Test Conditions Results
Fire Rupture
Overcharge  Current: 200A
 State of Charge: 250%
 Max. Voltage: 20 V
 With constraining unit
Not observed Not observed
Over-discharge  Current: 200A
 Voltage: 0 V
Not observed Not observed
External short circuit  Short resistance: 3mO
 Ambient temperature: 55C
Not observed Not observed