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Wireless power transmission: a preliminary probe into WPT-related patents and standards of China, the United States and Japan
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(China IP)
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Updated: 2013-09-13
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II. China’s progress in WPT standards
For the huge market capacity, leading such industrial signposts such as Huawei Technologies Co., Ltd., Sang Fei Consumer Communications Co., Ltd., Haier Group and Philips Corporation, China Academy of Telecommunication Research (CATR) of the Ministry of Industry and Information Technology (MIIT) as well as China Communications Standards Association (CCSA) cooperated and formulated a progression plan for WPT-related industrial standards in 2011. These standards-to-be now reach their submitting phase and combine YD/T 1312, GB 9254, GB17625, GB/T 17626, ETSIEN 301 489-1 and WPC V1.1 in a manner that is suitable for the Chinese consumer market. The following Table1 compares between different WPT standards organizations.
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Schedule of R&D Organizations of WPT Standards
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Name
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Geographical Coverage
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Area of Interest
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Status of Standards Development
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GSC
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Globe
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Technical standards
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GSC-16 scheme completed
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IEC TC100
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Globe
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Technical standards
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Phase-I project started
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ISO/IEC JTC1
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Globe
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Technical standards
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SC6 NWI+IEC TC100 being tested
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CJK
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Globe
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Regulatory +
technical standards
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CCSA, ARIB and TTA in cooperation
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CEA
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Asia
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Technical standards
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CEA, R6.3 and WG1-WG5 in cooperation
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ETSI
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U.S.
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Regulatory standards
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ETSI, TC and ERM in cooperation
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CCSA
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Europe
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Regulatory standards
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TC9 WG1 (EMC) and WG3(RF) standards being formulated
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BWF/ARIB
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China
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Regulatory + technical standards
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Draft standards passed
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TTA
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Japan
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Regulatory + technical standards
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PG709 draft standards passed
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III. WPT-related patent landscaping and countermeasures
Analysis of WPT-related patent applications in China
At the website of the State Intellectual Property Office (SIPO), using the keywords “Wireless Power,” the search results provide that by March 18th, 2013, the related patent applications were 434, of which 195 were under the H02J directory (power supply or distribution circuits, devices and systems; electric energy storage systems). This proves active innovation in the WPT area, and the annual tendency is as follows. As shown, the WPT-related patent applications entered a fast developing phase since 2009.
In China, the top ten applicants that file the most WPT-related patent applications are located in Guangdong, Tianjin and Shanghai, respectively in the Pearl River Delta, the Bohai Ring Area and the Yangtze River Delta. Haier Group, for example, has two of its patents published by the SIPO, including the “Wireless Power Emitting Device and Wireless Power System” filed in 2012 and the “Wireless Power Realization Device” filed in 2011, both of which have not been granted. Shanghai Jiao Tong University is also not optimistic with patent accumulation, including 2 granted patents and the other 15 invalid patent applications that must have been rejected by the SIPO. This indicates that Chinese R&D institutions and enterprises are weak in the WPT area. They should accelerate their input to avoid being charged for patent royalties in the future.
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