Manufacturing process method of all-solid-state lithium ion battery

A lithium-ion battery and manufacturing process technology, applied in the direction of electrolyte battery manufacturing, sustainable manufacturing/processing, secondary batteries, etc., can solve the problems of high energy consumption in drying, low flash point, and low battery safety, and achieve The effect of changing the growth direction, reducing the cost of use, and improving safety

Pending Publication Date: 2021-12-17
上海轩玳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safety issue of the power battery has always been a pain point in the industry and cannot be effectively solved. The safety problem is reflected in the spontaneous combustion of the car during charging, driving and parking. The fundamental reason is that the current power battery still uses liquid organic electrolyte. It has a low flash point and is an extremely flammable substance. At the same time, the positive electrode material is in a high oxidation state, which enhances the combustion degree of the battery.
[0004] However, in the above-mentioned prior art, the efficiency of ion exchange is very low, and there are problems in the passage of electrons between the active material particles and the outside world; it also affects the transmission of lithium ions, and the energy consumption of drying is high.
Batteries are also less safe

Method used

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  • Manufacturing process method of all-solid-state lithium ion battery
  • Manufacturing process method of all-solid-state lithium ion battery
  • Manufacturing process method of all-solid-state lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the positive electrode active material layer includes positive electrode active material (ternary material NCM, NCA and other high-energy positive electrode materials) particles, the size of which is in the order of microns, D50 is 5-20 microns, and its surface has been coated with small particles of carbon black (diameter 30-200 nanometers) and small particles of solid electrolyte particles (30-200 nanometers), carbon black 150-200 nanometers or carbon nanotube fibers, etc. PVDF and solid electrolyte particles have a particle size D50 of 2-9 microns.

[0024] First heat and melt PVDF in a kneading equipment, the temperature control range is 100-250 degrees Celsius (°C), and then add small particles of carbon black, solid electrolyte, and active substances for kneading, and the proportion of active substances accounts for 70%-98%. PVDF accounts for 1.5%-15%, conductive agent 1%-2%, and solid electrolyte particles 2%-10%; then, knead in a mixer...

Embodiment 2

[0032] The positive electrode active material layer includes positive electrode active material (ternary material NCM, NCA and other high-energy positive electrode materials) particles, the size of which is in the order of microns, D50 is 5-20 microns, and its surface has been coated with small particles of carbon black (diameter 30-200 Nano) and small particles of solid electrolyte particles (30-200 nanometers), carbon black 150-200 nanometers or carbon nanotube fibers, etc. PVDF and solid electrolyte particles have a particle size D50 of 2-9 microns.

[0033] First heat and melt PVDF in a kneading equipment, the temperature control range is 100-250°C, then add small particles of carbon black, solid electrolyte, and active substances for kneading, the proportion of active substances accounts for 70%-98%, and PVDF accounts for 1.5% %-15%, conductive agent 1%-2%, solid electrolyte particles 2%-10%; then, knead in a mixer to form a uniform plastic colloidal state, and roll into s...

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Abstract

The invention relates to a manufacturing process method of an all-solid-state lithium ion battery, and belongs to the technical field of new energy power energy storage batteries. The all-solid-state battery pole piece group of the all-solid-state lithium ion battery is composed of a positive current collector, a positive active material layer, a diaphragm, a negative active material layer and a negative current collector, and the positive active material layer is composed of positive active material particles, a solid electrolyte, conductive particles and a polymer adhesive. The large-particle positive active material particles wrap the small-particle solid electrolyte and the conductive particles, and are in contact with the small-particle solid electrolyte and the conductive particles through a high-molecular adhesive. Solid electrolyte and conductive particles are mixed and coated on the surfaces of active substance particles, so that the ion exchange efficiency is improved, and the problem of electron transmission channels is solved; and by adopting kneading and mixing processes and equipment thereof, the use cost of a solvent and the environmental problem are reduced, lithium ion transmission is not influenced, and the drying energy consumption is reduced. The metal lithium negative plate structure changes the growth direction of lithium dendrites in the charging and discharging process, and the safety of the battery is improved.

Description

technical field [0001] The invention relates to a manufacturing process method of an all-solid-state lithium ion battery, belonging to the technical field of new energy power storage batteries. Background technique [0002] Power lithium-ion batteries have been popularized and applied in pure electric vehicles as an energy storage device. However, the safety issue of the power battery has always been a pain point in the industry and cannot be effectively solved. The safety problem is reflected in the spontaneous combustion of the car during charging, driving and parking. The fundamental reason is that the current power battery still uses liquid organic electrolyte. It has a low flash point and is an extremely flammable substance. At the same time, the positive electrode material is in a high oxidation state, which enhances the combustion degree of the battery. With the successful research and development of solid electrolyte materials and gradually applied to power ion batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525H01M10/058H01M4/80H01M4/1395H01M10/42B82Y30/00B82Y40/00
CPCH01M4/62H01M4/624H01M10/0525H01M10/058H01M4/80H01M4/1395H01M10/4235B82Y30/00B82Y40/00Y02E60/10Y02P70/50
Inventor 娄豫皖
Owner 上海轩玳科技有限公司
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