Ultracapacitor energy storage for hybrid city buses -
up to 30% decrease in fuel consumption and emissions

+ Large temperature window
+ Much safer than batteries
+ A minimum of 1,2 mil km or 200k working hours
+ High duty cycle
+ High power density required
+ Retrofit or new design option
+ Payback time 2-3 years


Power Profile Simulation

We analyse the power profile of your buses to define the optimal ultracapacitor energy storage:

+ The optimal size to fulfill technical and business needs
+ Lifetime of the system
+ Thermal evaluation
+ Cooling requirements and heat dissipation
+ Efficiency
+ Voltage stability
+ Performance degradation over lifetime
+ Current and voltage profile to define proper inverter parameters

 

Parameters for micro and mild hybrid buses

Parameter Micro Mild
Voltage 24V to 100V 24V to 100V
Battey size, kWh Low, <4 kWh Mid, 4-20 kWh
Battery power, kW 5-20 kW 20-100 kW
Fuel savings 5-10 % 20-30 %
Regen. time Very fast, <10 sec Relatively fast, <25 sec
Applications
  • Start-stop
  • Low regen.
  • Auxiliaries for AC
  • Higher efficiency for ICE
  • Start-stop
  • Mid-high regen.
  • Auxiliaries for AC, doors, lifters, radio
  • Higher efficiency for ICE

Skeleton Technologies' Ultracapacitor Modules for Mild and Micro Hybrid Buses

Skeleton-Technologies-51V-ultracapacitor-module.jpg

51V ultracapacitor module

Small module – high power

  • Lowest cooling requirements on the market
  • 20% higher energy density compared to competition
  • 1,2 million kilometers or 200 000 working hours
  • Can be retrofitted or integrated into new designs

 

Easy integration

  • CAN SAE J1939
  • R10
  • R100 (in certification process)
  • One interface with Upper system
  • Switchgear

 

Communications

  • CAN Bus
  • Master-slave option

Custom laser-welded cell pack

Customized based on your needs

  • Shape, layout, voltage, balancing, power, and communications all based on your requirements
  • Laser-welded – high reliability
  • 20% higher energy density compared to competition
  • A minimum of 1,2 million kilometers or 200 000 working hours
  • Can be retrofitted or integrated into new designs

 

Communications

  • CAN Bus
  • Master-slave option

 

Five levels of customization for cell packs and custom modules:

bus-cell-pack.jpg
Five levels of customization
custom module

Custom module

Customized based on your needs

  • Switchgear - battery-life interface
  • Shape, layout, voltage, balancing, power, and communications all based on your requirements
  • Laser-welded - high reliability
  • 20% higher energy density compared to competition
  • 1,2 million kilometers or 200 000 working hours
  • Can be retrofitted or integrated into new designs

 

Communications

  • CAN Bus
  • Master-slave option

Parallel Hybrid System

parallel hybrid system

In parallel with an ICE, ultracapacitors:

  • Enable downsizing the internal combustion engine
  • Provide fuel savings of up to 30%
  • Reduce CO2 and NOx emissions
  • Provide additional power in severe conditions (hills, mud, snow, heavy loads)
  • Ensure reliable engine starting in cold weather or start-stop situations

Request more information

Products used in heavy transportation
Industrial Cells Modules Engine Start Module 

Why Skeleton’s ultracapacitors are ideal for this market

Heavy transportation requires high power.

Large vehicles and buses benefit from the added power density that ultracapacitors can provide.

Operate in cold temperatures.

Ultracapacitors only lose about 5% energy at minus 25 degrees centigrade, compared to a battery’s energy loss of more than 50%. Our ultracapacitor-based Engine Start Module can comfortably operate at -40 ºC.

Reduced environmental impact.

In addition to not containing any harmful chemicals, ultracapacitor-based modules can help significantly reduce CO2 emissions in transportation.