How Plug-In Hybrid Cars Work
Like hybrid cars, plug-in hybrid cars are powered by two energy sources – an energy conversion unit (such as an internal combustion engine or fuel cell) and an energy storage device (usually batteries). Schematic of a Plug-in Hybrid Car The energy conversion unit can be powered by gasoline, diesel, compressed natural gas, hydrogen, or other fuels. The batteries can be charged by plugging into a standard 110-volt electrical outlet – a capability conventional hybrid cars do not have – in addition to being charged by the energy conversion unit when needed. Plug-in hybrid cars have a larger battery pack than conventional hybrid cars. During typical daily driving, most of a plug-in hybrid cars power comes from the stored electricity. For example, a plug-in hybrid car driver might drive to and from work on all-electric power, plug in the car to charge it at night, and be ready for another all-electric commute in the morning. However, the engine can be used when longer trips are required, and
