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From a trend perspective, from 2010 to July 2021, BYD had more patent applications in the field of power lithium batteries than CATL every year. In 2019, the difference in patent applications for power lithium batteries between the two was about 13 times, with 136 and 9 patents, respectively.

In 2020, BYD had 38 patent applications for lithium-ion batteries and 14 patent applications for CATL lithium-ion batteries. From January to July 2021, BYD had 4 patent applications for lithium-ion batteries and CATL had 0 patent applications for lithium-ion batteries.

(2) Comparison of patent market value: BYD's patent market value is higher

The total value of BYD Power Lithium Battery patents is higher than CATL, with a total value of 128 million US dollars, more than twice that of CATL. In terms of patent value distribution, the majority of power lithium-ion battery patents in both countries have a significant concentration of value below $30000.

(3) Comparison of patent cooperation applications: BYD and CATL have similar cooperation applications

In terms of patent cooperation applications, BYD, CATL and others have jointly applied for 8 patents for power lithium batteries.

Statistical caliber description: According to the calculation of the original applicant (patent holder) of [standard], editing and merging names are not supported.

(4) Comparison of patent application regions: China is an important layout area for both

At present, BYD and CATL's power lithium-ion battery patent applications are mainly concentrated in China, with 764 and 174 power lithium-ion battery patents applied for in China, respectively. The United States is the second largest region for both power lithium battery patent applications, with 88 and 40 power lithium battery patent applications in the United States, respectively.

Explanation of statistical caliber: Conduct statistics based on the deduplication rule of displaying one public text for each application, and select the latest text on the day of publication for calculation.

(4) Comparison of Patent Types: The proportion of invention patents between the two is relatively large

The main types of patent applications for BYD and CATL power lithium-ion batteries are invention patents. 78% of BYD's power lithium battery patents are invention patents; The CATL52% power lithium battery patent is an invention patent.

(5) Comparison of Patent Technology Composition: The first two major sub domains of the two layouts are consistent, but with different focuses

At present, "H01M10 secondary battery; and its manufacturing" and "H01M2 non active component structural parts or manufacturing methods [2]" are both the top two power lithium battery technology sub distribution fields of BYD and CATL, with BYD having the highest number of patent applications in the "H01M10 secondary battery; and its manufacturing" field, with 191; CATL in "H01M2 Structural Parts or Manufacturing Methods for Non Active Components

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