Bechtle: Staff parking garage with charging stations for 50 electric cars

Overview

Parking garage for Bechtle electric cars  

50 electric cars can be charged in the new parking garage at Bechtle AG

  • Bechtle AG, Germany's biggest IT systems house, has incorporated the electrification of the company's vehicle fleet into its sustainability strategy.
  • 50 charging points needed to be integrated into the new parking garage and supplied by the PV system located on the roof.
  • For the specific structural conditions, RTB GmbH & Co. KG developed a charging solution using charging technology and components from Phoenix Contact.
  • The fleet charging solution in the parking garage supports the expansion of Bechtle's electric vehicle fleet.

Customer profile

Rainer Kury and Torsten Kocher from Bechtle AG  

Rainer Kury (left) and Torsten Kocher from Bechtle AG

Bechtle AG also intends to electrify its vehicle fleet.

“Our aim is to increase the proportion of electric and hybrid company vehicles to 10 percent in the medium term,” explains Rainer Kury, who works in Corporate Communications at Bechtle. “The interest in such a change is growing all the time.”

Application

The tender for a new staff parking garage contained a provision that charging points must be provided for 50 electric cars. Additional requirements included easy expansion, billing in compliance with weights and measures regulations, and an energy management system to facilitate the use of renewable energy.

Contemporary parking garages with steel framing do not feature lots of load-bearing walls; their open design is characterized by vertical steel supports and cross bracing. If a charging post were to be used, a collision guard would be needed too; this would take up valuable space and increase costs. With no load-bearing wall, there is no way to mount a wall box. So the only option for installing the charging points were the narrow steel supports.

The charging points needed to be safe, reliable, and fit into the overall look of their surroundings. In addition, electrical installations in the commercial sector must be regularly reviewed and the associated costs should not rise in direct proportion to the number of charging points.

Solution

Control components in the central control cabinet, along with the protective and switching devices  

Control components in the central control cabinet, along with the protective and switching devices

“We commissioned Goldbeck, a construction company based in Bielefeld, to act as our general contractor in building the parking garage,” says Rainer Kury. “Only the real essentials needed to be included in the parking space.” As a result, the charging point itself consists of just the type 2 socket outlet, an RFID reader to identify the user, and local LED status indicators. The protective and switching devices, charging controllers, and energy meters are housed in the central control cabinet.

As Torsten Kocher from the Facility Management team of Bechtle AG in Neckarsulm explains: “Since no active power-carrying components are installed at the charging point itself, maintenance of the individual charging points simply involves a visual inspection and function test.” If there is no vehicle charging, there are no voltages above 12 V present at the actual charging point. The critical protective and switching devices are checked in the central installations room.

Electromobility specialist RTB decided to use the EV Charge Control Basic charging controller from Phoenix Contact – in conjunction with the EV-RCM DC residual current monitoring modules. This combination ensures high availability and prevents unnecessary servicing, thanks to an automatic reset function following any residual current caused by the vehicle. Once a user has been successfully identified, the relevant charging processes can be enabled via the standard RS-485 interface and the overlying Modbus/RTU protocol.

EV Charge Control Basic and energy meters in the control cabinet  

The EV Charge Control Basic charging controllers and energy meters in the control cabinet are controlled via a PC

Current charging currents and power values, as well as the amount of energy that has already been charged, are recorded using the EEM-350 energy meter, also from Phoenix Contact. Another advantage is that the devices are MID-certified. The energy meters can therefore be used to bill charging processes in compliance with weights and measures regulations.

“We have also linked this system to the parking garage control engineering, which is used to monitor parking spaces and provide users with dynamic guidance through the garage to the nearest available space,” adds Torsten Kocher. “This makes parking even easier.”

Summary

Solar panels on the roof of the parking garage at Bechtle  

The solar panels on the roof of the parking garage generate the energy to charge the vehicles

By combining the core competencies of the companies involved in parking garage control engineering, charging technology, and billing processes, it has been possible to come up with the perfect solution for fleet charging in the parking garage. All necessary aspects relating to construction and maintenance were taken into consideration here.

A concept for optimizing the use of renewable energy was also implemented. “Our installation has run without a hitch from the very beginning,” says Torsten Kocher to sum up. “Our RTB solution featuring Phoenix Contact components has a degree of maturity that will facilitate the expansion of our electric fleet.”

Do you want to implement your charging solution with us?

Send us your request and benefit from our services:

  • Combination of the right hardware and software components
  • Production of charging connectors with your logo for comprehensive branding
  • Charging cable ends can come with a step cut, pre-assembled, or compacted upon request
  • Creation of tested wiring diagrams for simple and safe implementation
  • Consideration of the latest charging standards, technological standards, and the German Weights and Measures Act
  • Support during connection to billing providers and building and energy management systems

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