Differential Inductive Positioning System for Wireless Charging as Extension for the Standards to a Multi Ground Assembly Parking Spot with "No Preselection" as Enabler for Market Breakthrough

In wireless charging for light duty vehicles, three of the four key interoperability topics (coil system, operating point, communication, and positioning) have been defined for some time. Positioning is the last cornerstone that is still missing for a complete standard description. The Differential Inductive Positioning System (DIPS) has established itself as the standard procedure within the SAE J2954 standard. Positioning is the main experience that the end customer has with wireless charging, as the actual charging process can only be perceived via visual signals. A closer look at this end customer experience reveals that all wireless charging standards (SAE, IEC, ISO, GB) have so far only considered charging in a parking lot with one ground assembly unit. And a data connection between VA and GA is established before the actual positioning process. As a result, it is not possible for the driver to freely select a parking space. Instead, the respective parking space must be selected before driving into it. A preselection would be very unintuitive also when it is regarded to roll out the alignment method for dynamic wireless charging as well. With DIPS a solution has been presented for this, which has been adopted in SAE J2954. DIPS makes it possible for the driver to park freely without having to preselect a parking space e.g., on the display. This additional degree of freedom is a great benefit for the driver's comfort, which can be a push for the market breakthrough of wireless charging for light-duty vehicles and thus for electromobility in general.