In 2018, Gotion Hi-Tech invested 493 million yuan in research and development. The research and development projects include: 22-platform lithium iron phosphate battery development, ternary battery development and industrialization, battery capacity design and manufacturing assurance technology, model-based battery design, and There are six significant projects including intelligent manufacturing technology development, technology to improve battery energy density, and 20 platform lithium iron phosphate battery development.

The 22 platforms lithium iron phosphate battery research and development project, the battery capacity design and manufacturing support technology project, and the 20 platform lithium iron phosphate battery development project have been completed. The detailed project development direction and progress are as follows:

(1) "22 platform lithium iron phosphate battery research and development project": mainly used in the product "2265146 battery", mainly to change the current traditional positive and negative material formula, develop high-performance conductive agents and binders, reduce their consumption, improve The ratio of positive and negative active materials, as well as the selection of raw materials with higher gram capacity, higher compaction density, more minor rebound, and the use of thinner current collectors.

In addition, according to the higher risk points of DFMEA, it is possible to focus on improving the process method and using the gap coating process and the tab forming using the spot welding process. The project was completed at the end of 2018.

(2) "Ternary battery development and industrialization" research and development project: It is mainly used in the product "ternary 2714891 battery greater than 50Ah". The purpose of research and development is to change the soft connection structure, change the formulation of positive and harmful materials, and develop high-performance conductive agents. , Increase the proportion of active materials, and increase the battery capacity under the same VDA size. As of 2018, the project is in the mass production review stage.

(3) "Battery capacity design and manufacturing support technology" research and development project: mainly used in the product "27175200 battery", the research and development purpose is: To improve the material system; to select raw materials with higher gram capacity, higher compaction density, and more minor rebound; Lightweight design of cover plate structure; Reduce unit AH electrolyte demand; Optimize and research the sealing process to reduce the scrap rate. The project was completed at the end of 2018.

(4) "Model-based battery design and intelligent manufacturing technology development" R&D project: The goal is to develop an industry-leading high specific energy ternary power lithium battery with an energy density of 300Wh/kg. Based on the design decomposition of various theoretical models, from the perspective of material and design system matching, achieving high specific energy while considering high safety and developing high specific energy, low cost, and long life power lithium-ion battery cells with active safety functions.

At the same time, with the implementation of this project as the starting point, an industrial technology alliance will be formed to break through the existing technical bottlenecks from all aspects of the power lithium battery industry chain, catch up with advanced international companies, and achieve breakthroughs in the core technology of power lithium battery manufacturing, making lithium-ion power lithium The battery is developing in the direction of "high quality, high efficiency, and high stability," and finally realizes the upgrading of my country's power lithium battery technology industry. The end of 2018 is in the design freeze stage.

(5) R&D project of "Technology to Improve Battery Energy Density": It is mainly used in the product "32135-15Ah battery", and the purpose of R&D is to develop high-capacity cathode materials; Lightweight design of structural parts to ensure mechanical strength; development of electrolyte and liquid injection processes. The battery energy density has been increased to 190Wh/kg, becoming a benchmark in the lithium iron phosphate battery industry. At the end of 2018, the project was in the mass production review stage.

(6) R&D project of "20 Platform Lithium Iron Phosphate Battery Development": Targeted development for the particular vehicle market through the introduction of high-pressure-compact, high-gram-capacity iron-lithium cathode materials, high first-efficiency, high-pressure, and low-rebound graphite anode materials, the improvement of positive and negative electrode formulations, the optimization of liquid injection, the technology of thick electrodes, the optimization of structural parts, the progress of the cell manufacturing process and other aspects of process improvement, and the development of high-safety, high-energy-density lithium-ion power lithium batteries that meet national standards and market demands. Battery. The project was completed at the end of 2018.