E-car wallboxes: No more tangled cables

  • Industry News
  • Nov 30,22
One quick tug and the power cable rolls up: with the e-tract 2.0 automatic retraction system, igus wants to make charging on wallboxes a bit more convenient for e-car owners. The special feature: thanks to the ingenious interplay of two guide rollers, long extension lengths are possible with limited installation space.
E-car wallboxes: No more tangled cables

One quick tug and the power cable rolls up: with the e-tract 2.0 automatic retraction system, igus wants to make charging on wallboxes a bit more convenient for e-car owners. The special feature: thanks to the ingenious interplay of two guide rollers, long extension lengths are possible with limited installation space.

Many e-car owners will be familiar with the dilemma: after charging the vehicle on the in-house wallbox, they would have to wind up the power cable by hand. But lethargy triumphs. The cable stays on the ground. Unprotected from wind and weather, it presents a tripping hazard and is unsecured. "We are therefore working on a compact retraction system that automatically retracts the cable - just as easy as with a vacuum cleaner," said Jörg Ottersbach, Head of Business Unit e-chains at igus. Although the system is currently still a design study, implementation is planned. Laboratory tests have already been carried out. "To offer a solution that is as simple and space-saving as possible, igus plans to integrate the wallbox electronics into the e-tract 2.0 system."

The system is particularly compact thanks to the ingenious interplay of two guide rollers. The rollers sit at the ends of the rectangular housing. The cables are wound up in multiple tracks like with a pulley. If the user pulls the power cable, the lower guide roller moves towards the upper roller on a linear rail while unwinding. "This dynamic multiple deflection allows us to achieve long extension lengths with limited installation space," explained Ottersbach. The cable can be extended up to a length of five metres. The user can then conveniently attach the connector to the vehicle. To give the system full freedom of movement, the housing is mounted on a swivel base. After charging, a short tug is enough and the system automatically rewinds the cable. This means that the cables do not pose any risk to the users.

The retraction system is designed to last. Weatherproof and UV-resistant plastics are used in the housing, some of which are recyclates. The rollers are made of high-performance plastic that is gentle on cables. The cable itself also has a defined bend radius. Another special feature of the design: the power connection, which is connected to the wallbox, does not rotate during unwinding. A slip ring, which is indispensable for classic cable drums, is therefore superfluous. "This design principle makes our retraction system more fail-safe," emphasised Ottersbach. "Wallbox owners will also be able to use the automatic retraction system outdoors for many years without maintenance." The same applies to many other areas of application, from control panels to wired tools on assembly lines and work tables.

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