Wireless power company (WiTricity) is working with Nissan to promote the application of wireless charging systems for electric vehicles. Both companies have joined SAE InternaTIonal J2954 standardization work and are committed to wireless power transfer (WPT).
The two companies collaborated and submitted a joint design system to the Task Force (using the DRIVE system of the Wireless Power Company). In January, the circular topology (circular topology) technique is selected SAE InternaTIonal J2954 special group, official test using the test station of the wireless charging system interoperability and compliance of the standard (standards compliance). The product developed by the automobile manufacturers, Tier One suppliers and charging infrastructure providers will measure the control parameters 3.7 kw and 7.7kw test station (WPT 1 and WPT 2; J2954 team also light charging rate 11 kw (WPT 3) And 22 kw (WPT4) has expectations.
The standard is designed to ensure interoperability between the various types of electric vehicles currently being developed by global car companies, to improve charging performance, and to deploy wireless charging stations for the next generation of electric vehicles and plug-in hybrid vehicles. SAE J2954 Taskforce has been working on developing the required specifications and standards since 2010 to achieve seamless interoperability.
In December 2016, the J2954 task force conducted a bench test (bench tesTIng) at the Idaho NaTIonal Laboratory, demonstrating the so-called double D (DD) and circular topology in the range of 3.7-7.7 kW. Energy efficiency should exceed 85-90%.
DRIVE wireless power company's reference design series electric vehicle comprising: 3.7 kW, 7.7 kW and 11 kW, can be enlarged to 22 kw or higher, which is based on the company's patent - magnetic resonance imaging (magnetic resonance technology) implemented . This design has an end-to-end performance of 91%-94%, combining Wireless Power's tunable matching network technology (TMN) with prototype topology technology.
TMN technology enables wireless charging systems to automatically optimize ground-to-vehicle energy transfer under a variety of real-world conditions, including: parking misalignment, differences in vehicle ground clearance, and differences in battery voltage conditions. This technology flexibility enhances the interoperability of wireless charging vehicles and charging equipment with standard-based charging sources from major automotive manufacturers, first-tier supply chains, and infrastructure suppliers.
The wireless power company TMN technology will be delivered as a compact electronic module that can contain dedicated hardware and software algorithms that can be incorporated into terrestrial wireless charging sources and in-vehicle wireless power interceptors.
The Wireless Power DRIVE system maximizes energy efficiency and delivers power over a wide range of parking calibration, battery voltage and power conditions. In addition, the company's DRIVE 11 provides direct-to-battery charging, which eliminates system losses associated with DC-to-DC converters and car chargers. Set to handle different battery voltages, including the latest 800V battery pack for next-generation high-performance electric vehicles.
Both Nissan and other car companies recognize that interoperability plays a crucial role in optimizing the charging experience of electric vehicles and driving electric vehicles in a wider range. This means ensuring that the owner can freely charge at any charging station, and the charging device is compatible with a variety of vehicle sizes and vehicle types.
Nissan believes that wireless charging has great potential and can promote the widespread recognition of electric vehicles. Nissan executives said that the company is pleased to cooperate with professional technology companies such as wireless power companies to promote the latest technologies and improve the interoperability, energy efficiency and user convenience of wireless charging technology.
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