page_title: AFS Trinity
section_title: Technology
hierarchical_section_title: AFS Trinity / Technology
caption_attribution_description: English: A 3D cutaway image of AFS Trinity's XH-150 plug-in hybrid electric car including speedometer, ultracapacitor and battery state-of-charge gauges.
context_page_description: AFS Trinity Power Corporation is an American corporation headquartered in Medina, WA with an engineering center in Livermore, CA that develops technology for plug-in hybrids. The company has developed PHEV technology that actively combines batteries with ultracapacitors. The company asserts that the combination of high-power ultracapacitors, which prefer to discharge and recharge quickly, and high-energy lithium-ion batteries, which prefer to discharge and recharge slowly, makes for a system with both long-life and high energy-density storage.
context_section_description: The powertrain using two forms of energy storage is disclosed in US patent application 11/519,350.
  The application describes a family of architectures where a battery is used in conjunction with a second energy storage device which may be an ultracapacitor, a flywheel, or a second battery.  The purpose of the second energy  storage device is to protect the battery from high current during high power operation.
caption: 3D Cutaway of "Extreme Hybrid" Drive Train Technology as implemented in the XH-150 Plug-in Hybrid Prototype.
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