The Korea Intellectual Property Office reported that the submission of patents related to an integrated heat management system for eco-friendly cars mainly from China, the US, Japan, South Korea, and Europe jumped by an average of 11 percent every year over the last decade.
China has submitted the largest number of patents in the last 10 years, with 3,725, covering 51 percent, followed by the US, Japan, South Korea, and Europe.
According to the number of patents each company submitted, Toyota Motors Corp. (678) had the most submissions, followed by Hyundai Motor Co. (609), LG Chem Ltd. (425), Honda Motor Co. (320), and Ford Motor Co. (254).
Over the past five years, the number of patents relating to heating using waste heat has increased by 29.7 percent annually, outpacing patents relating to heat management of batteries and fuel cells (18.1 percent), heat pumps (14.5 percent), and heat management using X-way valves (14 percent).
The recent increase in the filing of waste heat management patents is primarily intended to increase range by overcoming a lack of heat sources and minimizing the use of the air conditioning system.


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