The core technologies and technology sources are as follows:

　　1. Battery core safety components

　　Purpose: Used to solve the problem of battery penetration and overcharging at the same time.

　　Core technology description: This technology enables the power battery to form independent protection circuits under overcharging and nail-piercing abuse, effectively protecting the power battery and ensuring that each safety component plays its role in different unexpected situations.

　　Technology source: independent research and development.

　　2. Single cell conductive sheet

　　Purpose: Used to solve the problem of battery overcharging.

　　Core technology description: The power battery provided by this technology can effectively prevent the conductive sheet from breaking, failing or deforming during use; improving battery safety performance; on the premise of ensuring battery safety, the conductive sheet is designed on the top cover to further reduce Occupies additional battery space and improves battery energy density.

　　Technology source: independent research and development.

　　3. Copper-aluminum composite pole

　　Purpose: Used to convert copper to aluminum on the negative pole so that the aluminum bar can be laser welded to the negative pole.

　　Core technology description: The power battery top cover structure provided by this technology can convert the negative pole from copper to aluminum, and can effectively prevent the joint surface between the upper section of the pole and the lower section of the pole from cracking or even disconnecting, ensuring the consistency of the connections between batteries. ,reliability.

　　Technology source: independent research and development.

　　4. Pole piece roller stretching technology

　　Purpose: Used to roll-stretch the pole pieces to improve the uniformity of pole piece extension.

　　Core technology description: This technology can effectively reduce or even eliminate the wrinkles of the strip, improve the flatness of the strip, and increase the compaction density of the pole pieces.

　　Technology source: independent research and development.

　　5. High-speed winding technology of pole piece diaphragm

　　Purpose: To achieve high-speed winding of pole piece separators and reduce costs.

　　Core technology description: This technology provides a rolling product processing device. The processing device includes a rolling needle and a shaping mechanism. The shaping mechanism includes a movable part, a first acting part and a second acting part. The outer surface of the rolling needle is provided with a receiving chamber. Groove; by improving the winding needle and corresponding mechanical components, the company has achieved good control of the diaphragm tension while increasing the winding speed.

　　Technology source: independent research and development.

　　6. Electrolyte technology for ternary system low impedance products

　　Usage: used in ternary system products.

　　Core technology description: This technology provides an electrolyte formula that can be used in ternary system products, which can form an effective interface film on both the anode and cathode, so that the battery has a good storage life and reduces the battery impedance at the same time.

　　Technology source: independent research and development.

　　7. Electrolyte technology for ternary system to suppress gas production

　　Usage: used in ternary system products.

　　Core technology description: This technology provides an electrolyte formula that can be used in ternary system products, which can significantly improve the gas production of the battery system using this formula, and has a high capacity retention rate and good low-temperature power performance. .

　　Technology source: independent research and development.

　　8. A modified negative active material technology

　　Usage: Used in ternary system products or lithium iron phosphate system products.

　　Core technology description: This technology provides a modified negative active material, which better improves the kinetic performance, storage performance and cycle life of the battery compared with traditional technology.

　　Technology source: independent research and development.

　　9.Battery pack thermal management technology

　　Purpose: Used to heat or cool the battery pack.

　　Core technology description: Battery pack thermal management components using this technology can effectively improve the cooling efficiency of the battery pack and ensure the consistency of battery temperature. The company improves cooling efficiency and achieves heating by setting up thermal management components.

　　Technology source: independent research and development.

　　10. Frame structure of battery module

　　Purpose: Used to accommodate and fix multiple single batteries and absorb battery expansion force.

　　Core technology description: The battery module using this technology uses a lower case with multiple grids and an upper cover with conductive connectors and safety valves, so that the space between the cells can be fully utilized and production efficiency improved; The company improves space utilization by simplifying the module structure.

　　Technology source: independent research and development.

　　11.Module Pack integration technology

　　Purpose: Used to simplify the battery box structure, increase energy density, and reduce costs.

　　Core technology description: This technology allows the battery box and the cells arranged inside to be bonded through structural adhesive, which can fix the cells.

　　Technology source: independent research and development.

　　12. Fully automatic laser welding machine technology

　　Purpose: To improve the excellence rate and efficiency of welding process in battery production.

　　Core technology description: This technology effectively reduces the welding temperature, ensures the stability of the welding process, and improves the welding excellence rate and efficiency; it improves the welding excellence rate by improving the laser output consistency and the linkage control of various mechanisms.

　　Technology source: independent research and development.

　　13. Battery module assembly technology

　　Purpose: Used for rapid assembly of battery modules to improve the safety and reliability of battery modules.

　　Core technology description: This technology can improve the anti-vibration stability and electrical connectivity of the battery module, and can quickly dissipate the heat of the battery, thus improving the safety and reliability of the battery module.

　　Technology source: independent research and development.

　　14. Calculation method of remaining capacity of power battery pack

　　Purpose: Accurately calculate the remaining capacity of the battery pack.

　　Core technology description: This method reduces the error in the calculation of the remaining capacity of the power battery pack by introducing a charge correction coefficient and a discharge correction coefficient.

　　Technology source: independent research and development.

　　The core technology of Ningde era mainly comes from the technology accumulation through independent research and development by the technology research and development team with Wu Kai, Zhao Fenggang, Xiang Yanhuo, Hu Jianguo, Tang Honghui and others as the core. The professional qualifications, important scientific research achievements and awards obtained by these five core technical personnel are as follows:

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