Electric Vehicle Charging Systems
Overview and Standards Questions And
Answers
/First EV - Answer-The first EV was invented in 1832.
/.First EVs - Answer-The first EVs were slow to charge, had a short range, and were not
fast.
/.First mass produced hybrid - Answer-The first mass produced hybrid was the Prius.
/.HEV - Answer-HEV (Hybrid EV) has been the longest EV available to consumers.
/.Commercial/Industrial EVs - Answer-There are cargo and material handling EVs
(forklifts etc), vans and buses, and semi trucks.
/.Fleet charging - Answer-Fleet charging can be plug in, or wireless.
/.Fleet battery capacity - Answer-Fleet battery capacity has reached upwards of
550kWh.
/.SOC - Answer-SOC stands for State of Charge.
/.EVCS - Answer-EVCS - Any piece of equipment that charges an EV battery pack.
Could be EVSE or DC Fast Charging.
/.EVSE - Answer-EVSE - Supplies AC to the vehicle's battery management system
where it is converted to DC to charge the battery.
/.EVSP - Answer-EVSP - Is a provider that installs and operates a network of stations
providing a service to EV drivers.
/.NRTL - Answer-NRTL - A nationally recognized testing laboratory tests, certifies and
inspects products to UL, ANSI, CSA, ASTM and NFPA standards for safety and
performance.
/.Rectifier - Answer-A rectifier was used to cover AC to DC to charge EVs.
/.AC EVSE - Answer-AC electric vehicle supply equipment (EVSE) supplies AC power
to the charging port where the car converts it to DC.
, /.DC charging equipment - Answer-DC charging equipment supplies DC to the battery
management system.
/.Typical EV AC conversion - Answer-Typical EVs today can convert a maximum of
6.6kW AC. Some EVs available today can convert up to 19.2kW.
/.DC quick chargers - Answer-DC charging equipment provides Direct Current power
directly to the EV battery allowing for much higher levels of power transfer.
/.Current DC charging capacity - Answer-Currently installed DC charging equipment can
provide up to 120 kW, future equipment may rise to 400 kW or higher.
/.EVSE safety features - Answer-EVSE provides several safety features including:
ground fault circuit interruption (GFCI), ground verification, and safety lock-out de-
energizing when the cable is not properly connected to the EV.
/.J2954 - Answer-J2954 is the SAE standard for wireless charging.
/.Level 1 charger - Answer-A level 1 charger is 120V and 14-16 amps.
/.Level 2 charger - Answer-A level 2 charger is 208/240 and up to 80 amps.
/.J1772 Standard - Answer-The J1772 standard control pilot terminal pin changes the
state of the EVSE according to the voltage present.
/.J1772 connector pin - Answer-A charging interface that is safe for consumers to use,
signals the EVSE to stop charging based on the pin contact state, and indicates that the
connector is properly seated on the vehicle.
/.State of Charge - Answer-A determining factor in calculating the time needed to fully
charge an EV battery.
/.Max power capacity of EV's converter - Answer-The maximum power output that the
electric vehicle's converter can handle.
/.Size of the feed to the EVSE - Answer-The capacity of the electrical supply that feeds
into the Electric Vehicle Supply Equipment.
/.CHAdeMO V1.0 Standard - Answer-A standard for DC charging equipment with
charging power up to 62.5 kW, 500 VDC, and 125 MPS.
/.Competing standards in the U.S. - Answer-Three main standards: CHAdeMO, J1772
CCS (combination), and Tesla Supercharging (Proprietary).
Overview and Standards Questions And
Answers
/First EV - Answer-The first EV was invented in 1832.
/.First EVs - Answer-The first EVs were slow to charge, had a short range, and were not
fast.
/.First mass produced hybrid - Answer-The first mass produced hybrid was the Prius.
/.HEV - Answer-HEV (Hybrid EV) has been the longest EV available to consumers.
/.Commercial/Industrial EVs - Answer-There are cargo and material handling EVs
(forklifts etc), vans and buses, and semi trucks.
/.Fleet charging - Answer-Fleet charging can be plug in, or wireless.
/.Fleet battery capacity - Answer-Fleet battery capacity has reached upwards of
550kWh.
/.SOC - Answer-SOC stands for State of Charge.
/.EVCS - Answer-EVCS - Any piece of equipment that charges an EV battery pack.
Could be EVSE or DC Fast Charging.
/.EVSE - Answer-EVSE - Supplies AC to the vehicle's battery management system
where it is converted to DC to charge the battery.
/.EVSP - Answer-EVSP - Is a provider that installs and operates a network of stations
providing a service to EV drivers.
/.NRTL - Answer-NRTL - A nationally recognized testing laboratory tests, certifies and
inspects products to UL, ANSI, CSA, ASTM and NFPA standards for safety and
performance.
/.Rectifier - Answer-A rectifier was used to cover AC to DC to charge EVs.
/.AC EVSE - Answer-AC electric vehicle supply equipment (EVSE) supplies AC power
to the charging port where the car converts it to DC.
, /.DC charging equipment - Answer-DC charging equipment supplies DC to the battery
management system.
/.Typical EV AC conversion - Answer-Typical EVs today can convert a maximum of
6.6kW AC. Some EVs available today can convert up to 19.2kW.
/.DC quick chargers - Answer-DC charging equipment provides Direct Current power
directly to the EV battery allowing for much higher levels of power transfer.
/.Current DC charging capacity - Answer-Currently installed DC charging equipment can
provide up to 120 kW, future equipment may rise to 400 kW or higher.
/.EVSE safety features - Answer-EVSE provides several safety features including:
ground fault circuit interruption (GFCI), ground verification, and safety lock-out de-
energizing when the cable is not properly connected to the EV.
/.J2954 - Answer-J2954 is the SAE standard for wireless charging.
/.Level 1 charger - Answer-A level 1 charger is 120V and 14-16 amps.
/.Level 2 charger - Answer-A level 2 charger is 208/240 and up to 80 amps.
/.J1772 Standard - Answer-The J1772 standard control pilot terminal pin changes the
state of the EVSE according to the voltage present.
/.J1772 connector pin - Answer-A charging interface that is safe for consumers to use,
signals the EVSE to stop charging based on the pin contact state, and indicates that the
connector is properly seated on the vehicle.
/.State of Charge - Answer-A determining factor in calculating the time needed to fully
charge an EV battery.
/.Max power capacity of EV's converter - Answer-The maximum power output that the
electric vehicle's converter can handle.
/.Size of the feed to the EVSE - Answer-The capacity of the electrical supply that feeds
into the Electric Vehicle Supply Equipment.
/.CHAdeMO V1.0 Standard - Answer-A standard for DC charging equipment with
charging power up to 62.5 kW, 500 VDC, and 125 MPS.
/.Competing standards in the U.S. - Answer-Three main standards: CHAdeMO, J1772
CCS (combination), and Tesla Supercharging (Proprietary).
