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Confidential CHAdeMO Association
5. Requirements about basic design and safety design for charger and vehicle
5.1. Charging method
Current control method shall be adopted for charging. The vehicle shall send charging current request to the
charger at a constant time interval. The charger shall output DC current for charging corresponding to the request
value. The charger shall regulate the output current in response to the change in the request value from the vehicle.
5.2. Control signal
A dedicated circuit shall be used to transmit signals for charging control.
5.3. CAN communication
The charger and vehicle shall exchange the proper parameters through CAN communication.
5.4. Mandatory functions
(1) Proximity detection
Both charger and vehicle shall have a means to confirm that they are connected with each other.
The vehicle which applied to ‘Plug and Charge
(1)
’ shall supply ‘connector proximity detection’ line with 12V signal.
The charger shall detect the status of connector mating and use it as a trigger to start charging.
However the vehicles before ver. 1.2 which don’t supply ‘connector proximity detection’ line with 12V signal is
not applicable.
Note (1): Inatantly starting charge at the same time which connect mating is confirmed.
(2) Power supply shutdown upon communication loss
The charger shall stop applying voltage to the charging cable and supplying current to the vehicle immediately in
case control signals or CAN communication between the charger and the vehicle is lost.
The vehicle shall send stop signal to the charger through signal wires that are not lost in case the control signals
or the CAN communication between the charger and the vehicle is lost.
(3) Prevention of false-drive
The vehicle shall monitor the status of the connection between the vehicle and the charger and shall have a
means to prevent drive while the charging connector is connected with the vehicle inlet (including before and after
charging).
The vehicle shall use ‘Connector proximity detection’ circuit for the confirmation of connection excluding the
period from the point at which ‘Vehicle charge permission’ circuit is turned on to the point at which EV contactor
is opened.
(4) Detection of the loss of continuity in the ‘protective earthing conductor’ line between charger and vehicle
The vehicle shall stop charging immediately in the case that the ‘protective earthing conductor’ line between a
charger and a vehicle is lost.
(5) Detection of ground fault in the output circuit
The charger shall detect a ground fault to the enclosure of the charger or vehicle chassis. If a ground fault is
detected, the charger shall stop applying voltage to the charging cable and supplying current to the vehicle
immediately. The vehicle shall not interfere with the ground fault detection of the charger.
(6) Protection against short circuit in the output circuit
The charger shall have means to protect itself and vehicle and prevent problems in power supply such as the AC
mains from short circuit. In addition, the output circuit and exposed live parts of a charger shall be properly
designed to prevent short-circuit which may be caused by water leakage and ingress of foreign materials.
(7) Prevention of overvoltage in vehicle system
The charger shall have means to prevent overvoltage in vehicle system.
(8) Interruption of charging current
The vehicle shall have an EV contactor capable of interrupting a maximum current requested by the vehicle.
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