PRODUCTS & SERVICES
Simplifying fast charging
Setting up a DC charging station is a challenging project, but it can be mastered
effortlessly with an intelligent and easy-to-program DC charging controller
www.electrichybridvehicletechnology.com // July 2019 // 153
The most complicated and
complex task before
commissioning a DC charging
station is programming the
communication with an electric
vehicle. This is based on DIN SPEC
70121 – a protocol developed
exclusively for this purpose and in
the future this standard will be
incorporated into ISO 15118 as an
integral part of the DC charging
process. The EV Charge Control
(EVCC) Professional from Phoenix
Contact includes all the interfaces
of a high-performance fast
charging station in one device. The
DC charge controller has been
designed in such a way that it
contains all the specific function
blocks that exactly map this
communication, saving the installer
or operator of the charging station
a great deal of work.
Digital communication between
a fast-charging station for electric
vehicles and the electric vehicle
itself for controlling the DC
charging process in accordance
with IEC 61851-24 can be set up
quickly. The entire program
sequence is stored on the controller
as a function block. In the event
that the programmer who develops
the application for operation does
not want to or cannot do this work,
Phoenix Contact o ers a module
as part of a specific library for
EVCC Professional.
The Modbus RTU protocol
has become established for
communication with energy meters
and is generally implemented via
the RS485 interface. The EVCC
Professional has two of these
interfaces. In this way, RFID
card readers can be connected to
authenticate the user. Alternatively,
two RS232 interfaces are available.
Phoenix Contact provides a
series of standard libraries for
easy use of the above-mentioned
protocols. Data exchange between
the charge controller and the power
electronics can be implemented via
the on-board interface of the CAN
bus or alternatively via Ethernet
using Modbus TCP.
There are 16 digital outputs
available, for example for controlling
additional LEDs with which the
current charging status can be
displayed. They record whether an
insulation measuring device has
triggered, whether the charging
station door is locked, and more.
Two PT1000 inputs are
implemented on the controller
to measure the temperature of the
DC contacts of the CCS connector
during the charging process. These
values can be acquired and
processed via the CAN bus
interface. The CAN bus interface
also enables the use of HPC
technology. This interface can
also be used to record and
process additional parameters
that go far beyond the simple
contact temperature.
The DC charge controller helps
save the installer or operator of the
charging station a signifi cant amount
of effort
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