With the analysis among 25 patents, we discovered top 22 key players by total patent application. NSK Ltd., GM Global Technology Operations LLC, State Grid Corp. of China are dominant in this area. They take 28.00% of the total patent filing.  
GM Global Technology Operations LLC
Michigan, United States
Patent: 2
State Grid Corp. of China
Beijing Shi, China
Patent: 1
Jiangsu Liance Electromechanical Technology Co., Ltd.
Jiangsu Sheng, China
Patent: 1
California, United States
Patent: 1
Henan Suda Electric Vehicle Technology Co., Ltd.
Henan Sheng, China
Patent: 1
Inha University Research & Business Foundation
Beijing Shougang Intl Engineering Technology Co. Ltd.
Beijing Shi, China
Patent: 1
Pierburg Huayu Pump Technology Co. Ltd.
Shanghai Shi, China
Patent: 1
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With the analysis among related 34 patents applied in the last 5 years. We discover 22 most active companies in this area. The fast-growing Chang'an University, Harbin University of Science & Technology, Jiangsu University take 38.24% of patent filing during this period.  
Shaanxi Sheng, China
Patent: 5
Harbin University of Science & Technology
Heilongjiang Sheng, China
Patent: 4
Jiangsu Sheng, China
Patent: 4
Nanjing University of Science & Technology
Jiangsu Sheng, China
Patent: 2
Tianjin University of Science & Technology
Tianjin Shi, China
Patent: 2
Beijing Changfeng Tiantong Technology Co., Ltd.
Beijing Shi, China
Patent: 1
Guangdong Agil Robot Technology Co., Ltd.
Guangdong Sheng, China
Patent: 1
Nanjing University of Technology
Jiangsu Sheng, China
Patent: 1
Shenzhen Polytechnic College
Guangdong Sheng, China
Patent: 1
Shenyang Polytechnic University
Liaoning Sheng, China
Patent: 1
With the analysis among related 34 patents in last 5 years, we discover 15 new entrants. Jiangsu University, Tianjin University of Science & Technology, Beijing Changfeng Tiantong Technology Co., Ltd. are the most active new entrants in this area.  
Jiangsu Sheng, China
Patent: 4
Tianjin University of Science & Technology
Tianjin Shi, China
Patent: 2
Beijing Changfeng Tiantong Technology Co., Ltd.
Beijing Shi, China
Patent: 1
Guangdong Agil Robot Technology Co., Ltd.
Guangdong Sheng, China
Patent: 1
Shenzhen Polytechnic College
Guangdong Sheng, China
Patent: 1
Suzhou Tongyuan Soft Control Information Technology Co., Ltd.
Jiangsu Sheng, China
Patent: 1
Anhui Sheng, China
Patent: 1
Shanghai University of Engineering Science
Shanghai Shi, China
Patent: 1
Jiangsu University of Science & Technology
Jiangsu Sheng, China
Patent: 1
Nanjing University of Posts & Telecommunications
Jiangsu Sheng, China
Patent: 1
With the analysis among 78 patents, we discovered top 37 universities and scientific research institutions by total patent application. Chang'an University, Nanjing University of Science & Technology, Nanjing University of Information Science & Technology are dominant in this area. They take 24.36% of the total patent filing.  
Shaanxi Sheng, China
Patent: 7
Nanjing University of Science & Technology
Jiangsu Sheng, China
Patent: 6
Nanjing University of Information Science & Technology
Jiangsu Sheng, China
Patent: 6
Harbin University of Science & Technology
Heilongjiang Sheng, China
Patent: 6
Jiangsu Sheng, China
Patent: 6
Jiangsu Sheng, China
Patent: 4
Nanjing University of Aeronautics & Astronautics
Jiangsu Sheng, China
Patent: 3
North China Electric Power University
Beijing Shi, China
Patent: 2
Zhejiang University of Technology
Zhejiang Sheng, China
Patent: 2
Zhejiang Sci-Tech University
Zhejiang Sheng, China
Patent: 2