Technical improvement of battery pack -Lithium - Ion Battery Equipment

Technical improvement of battery pack -Lithium - Ion Battery Equipment

Everyone is paying attention to the development of cell technology, the development level of cell life and safety, but it seems that little attention has been paid to the development level of battery pack (PACK) technology and the application of new technologies. I think this has a great relationship with the current owners and executors of PACK technology.

Why should the vehicle manufacturer dominate the battery pack?

At present, battery PACK technology is generally implemented by three types of entities: cell manufacturing companies, vehicle manufacturing companies and third-party independent or joint venture professional PACK companies. According to incomplete statistics, 60-70% of the PACK is completed by the core company (almost 100% in the field of passenger cars), 10-20% is completed by the vehicle company, and 20% is completed by the third party. The core manufacturing company is best at the core technology, so it will have a big voice in this field, which is also one of the reasons why the development of PACK technology is blocked at present.(Lithium - Ion Battery Equipment)

Personally, I think it is unreasonable to let the cell company take the main responsibility of PACK. It should be led by the vehicle manufacturer to lead the healthy and rapid development of PACK technology. Based on the following considerations:

First, the complexity and systematicness of PACK technology cannot be solved by the engineering capabilities involved in the core technology. PACK technology involves many disciplines, such as machinery, electronics, heat, fluid, etc., while the cell is more involved in chemistry, materials and thermal engineering, with little intersection. These professionals involved in PACK technology are necessary in the automotive industry and are more professional. If the core company wants to equip so many professional personnel, it will need a lot of capital injection. Under the current conditions, most core companies do not have these conditions. So the final result is that although you can do PACK yourself, it is more like building blocks, simple assembly, not the development of technology.

Second, the complete vehicle manufacturer is more aware of its own needs, and more able to consider problems from the perspective of the overall system in the design of the PACK, so as to better realize the organic coordination and unity of the PACK and the vehicle.

Third, the current international mainstream vehicle PACK technology is the mode of vehicle leading and battery core factory assisting. LEAF's PACK is dominated by Nissan, and NEC supplies monomer; TESLA's PACK is dominated by TESLA itself, and Panasonic only supplies monomer; Volanda, Prius and so on are all in this mode. In this mode, the core factory only needs to provide necessary support according to the requirements of the vehicle factory for the core parameters and design. Its main responsibility is to make a consistent core.

Fourth, the field of passenger cars belongs to special groups. The export of the international market is basically in China, while the passenger car space is relatively loose. At the same time, the technical strength of the passenger car factory is not at the same level as that of the passenger car. Therefore, this part of the PACK is basically completed by the core factory. But in the later stage, we should keep pace with the level of passenger cars.

For complex systems, more emphasis should be placed on specialization and fine division of labor, so as to prevent arranged work and improve system efficiency. From this point of view, the PACK development mode led by the whole vehicle factory and assisted by the core factory should be the inevitable choice in the future. Based on this judgment, the market structure of PACK for electric vehicles in the later stage will undergo a relatively big change compared with that now.



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