A charging station, also known as a charging point or electric vehicle supply equipment (EVSE), is a piece of equipment that supplies electrical power for charging plug-in electric vehicles (including electric cars, electric trucks, electric buses, environmental electric vehicles, and plug-in electric vehicles). in hybrid).
EV Charging
There are two main types: AC charging stations and DC fast chargers. Batteries can only be charged with direct current (DC) electric power, while most electricity is delivered from the power grid as alternating current (AC). For this reason, most electric vehicles have an onboard charger with an AC-to-DC converter (a rectifier). At an AC charging station, power is supplied to the onboard charger. DC fast chargers facilitate higher power charging, which requires much larger AC-to-DC rectifiers, so the converter is built as part of the charging station and DC power is supplied directly to the vehicle, bypassing the onboard converter. Most fully electric car models can accept both AC and DC power.
Charging stations provide connectors that conform to a variety of international standards. DC charging stations are commonly equipped with multiple connectors to be able to charge a wide variety of vehicles that utilize competing standards.
Public charging stations are typically found street-side or at retail shopping centers, government facilities, and other parking areas. Private charging stations are typically found at residences, workplaces, and hotels
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Standards
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Multiple standards have been established for charging technology to enable interoperability across vendors. Standards are available for nomenclature, power, and connectors. Notably, Tesla has developed proprietary technology in these areas, and built its charging networking starting in 2012.
Charging time
basically depends on the battery’s capacity, power density, and charging power. The larger the capacity, the more charge the battery can hold (analogous to the size of a fuel tank). Higher power density allows the battery to accept more charge/unit time (the size of the tank opening). Higher charging power supplies more energy per unit time (analogous to a pump’s flow rate). An important downside of charging at fast speeds is that it also stresses the mains electricity grid more.
