Manufacturing method of high power lithium ion power battery
A manufacturing method and power battery technology, applied in the direction of electrolyte storage battery manufacturing, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problem of planning and analysis of lithium, high performance requirements for high-current charging and discharging of batteries, and cannot meet high-current charging Discharge requirements and other issues, to achieve the effect of excellent cycle life and high specific power
Inactive Publication Date: 2019-03-05
JIANGSU JINYI NEW ENERGY TECH CO LTD
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Problems solved by technology
In the field of hybrid electric vehicles and electric tools, the high-current charging and discharging performance of the battery is high, and some specific workplaces even require the battery to be charged at 10C and discharged at 20C, which has very high power performance for the battery. The phenomenon of planning and lithium analysis is easy to occur under the environment, and it cannot meet the requirements of high-current charging and discharging.
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[0019] Take the 18650 type 3.8V 2200mAh battery as an example:
[0020] A. Production of positive and negative electrodes
[0021] The positive electrode material is mixed in proportion (active material: VGCF:PVDF=100:4~9:3), mixed and stirred with NMP (NMP: weight of solid matter=810:1500), and the viscosity of the positive electrode slurry is controlled at 6000cps. Press the positive electrode slurry figure 1 Evenly coated on the surface of aluminum foil, dried, rolled, and cut to the designed process parameters to make positive plates.
[0022] Positive electrode coating:
[0023] Dressing amount: 22mg / cm 2 ~38mg / cm 2
[0024] The positive electrode coating process is as follows: (reference speed: 6.5~7.5m / min; temperature zone reference temperature: 100°C / 105°C / 110°C / 115°C / 110°C / 105°C / 100°C)
[0025]
[0026] The negative electrode material is mixed in proportion (active material: VGCF:SBR:CMC=94:4~9:2.5:2.5), and mixed with H 2 O(H 2 O: weight of solid matter=1...
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Abstract
The invention relates to a manufacturing method of a high power lithium ion power battery. A positive plate, a diaphragm, and a negative plate are reeled in sequence to form an electrode set; and theelectrode set and organic electrolyte are filled into a battery shell to form the power battery. The positive plate is a thin and long electrode and LiNi<0.8>Co<0.15>Al<0.05>O2 is the main active substance of the positive plate. Slurry prepared from the active substance of the positive plate and a conductive agent (VGCF) is painted on the 2 area of an aluminum foil. The negative electrode is a long and thin electrode, and a graphite anode material is taken as the main active substance. Slurry prepared from the active substance of the negative plate and the conductive agent (VGCF) is painted onthe 5 area of a copper foil. The thickness of the negative electrode and the positive electrode is 0.06 to 0.18 mm.
Description
technical field [0001] The invention relates to the field of chemical power sources, in particular to a method for manufacturing a high-power lithium-ion power battery. Background technique [0002] Due to its superior comprehensive performance, lithium-ion batteries gradually replace nickel-cadmium batteries and nickel-metal hydride batteries in the fast-growing portable electronic equipment energy storage device market and occupy a dominant position. In the field of hybrid electric vehicles and electric tools, the high-current charging and discharging performance of the battery is high. Some specific workplaces even require the battery to be charged at 10C and discharged at 20C. The power performance of the battery is very high. Ordinary traditional lithium batteries work at high current The phenomenon of planning and lithium analysis is prone to occur under the environment, and it cannot meet the requirements of high-current charging and discharging. [0003] In view of ...
Claims
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IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 秦学王丽吕军王宏智
Owner JIANGSU JINYI NEW ENERGY TECH CO LTD