High-rate lithium titanate battery and production method thereof

A technology of lithium titanate battery and manufacturing method, which is applied in the direction of electrolyte storage battery manufacturing, secondary battery, battery pack parts, etc., can solve the problems of poor rate charging and discharging performance, long charging time and low safety of lithium titanate battery. , to achieve the effect of increasing rate performance, space stability, good flat performance and good wettability

Active Publication Date: 2018-06-29
CAMEL GRP NEW ENERGY BATTERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the current state of the art above, the purpose of the present invention is to provide a high-rate lithium titanate battery and its preparation method. The present invention adopts a special material system and formation and aging process to effectively solve the problem of long charging time of lithium titanate battery. Poor rate charge and discharge performance, low safety and other issues

Method used

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  • High-rate lithium titanate battery and production method thereof
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  • High-rate lithium titanate battery and production method thereof

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Embodiment 1

[0049] A method for manufacturing a high-rate lithium titanate battery includes the following steps:

[0050] a) Preparation of positive and negative plates: Firstly, polytetrafluoroethylene (PVDF) is mixed with N-methylpyrrolidone (NMP) into a 7% mass fraction solution, and then the positive electrode conductive agent superconducting carbon black is added, and high-speed shear dispersion 2 hours, the positive active material LiNi 0.33 Co 0.33 Mn 0.33 O 2 Disperse in the above NMP solution, stir evenly to obtain the positive electrode slurry, disperse at high speed for 2 hours, add NMP to adjust the viscosity to 6000mPa·s, after high speed shear dispersion for 1 hour, the positive electrode slurry is sieved with a 100 mesh metal mesh. Coat the sieved positive electrode slurry evenly on the 22um thick carbon-coated aluminum foil, the carbon-coated layer is SP, the thickness is 2um, and it is dried at 90℃. The dried positive pole piece is rolled and the positive electrode piece The...

Embodiment 2

[0062] A method for manufacturing a high-rate lithium titanate battery includes the following steps:

[0063] a) Preparation of positive and negative plates: First, prepare a solution of 8% mass fraction of PVDF with N-methylpyrrolidone (NMP), then add carbon nanotubes as the positive electrode conductive agent, and disperse at high speed. 2 Hours, the positive active material LiNi 0.5 Co 0.3 Mn 0.2 O 2 Disperse in the above NMP solution, stir evenly to obtain the positive electrode slurry, disperse at high speed for 2 hours, add NMP to adjust the viscosity to 8000mPa·s, after high speed shear dispersion for 1 hour, the positive electrode slurry is sieved with a 150 mesh metal mesh. Coat the sieved positive electrode slurry evenly on the carbon-coated aluminum foil with a thickness of 20um, the carbon-coated layer is SP, the thickness is 2um, and it is dried at 120℃. The dried positive pole piece is rolled, and the positive electrode piece The thickness after rolling is 85μm and ...

Embodiment 3

[0075] A method for manufacturing a high-rate lithium titanate battery includes the following steps:

[0076] a) Preparation of positive and negative plates: First, prepare a solution of 8% mass fraction of PVDF with N-methylpyrrolidone (NMP), then add carbon nanotubes as the positive electrode conductive agent, and disperse at high speed. 2 Hours, the positive active material LiNi 0.5 Co 0.3 Mn 0.2 O 2 Disperse in the above NMP solution, stir evenly to obtain the positive electrode slurry, disperse at high speed for 2 hours, add NMP to adjust the viscosity to 7000mPa·s, after high speed shear dispersion for 1 hour, the positive electrode slurry is sieved with a 150 mesh metal mesh. Coat the sieved positive electrode slurry evenly on a carbon-coated aluminum foil with a thickness of 20um, the carbon-coated layer is SP, the thickness is 2um, and it is dried at 100℃. The dried positive pole piece is rolled, and the positive electrode piece The thickness after rolling is 85μm and th...

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Abstract

The invention relates to the field of lithium batteries, in particular to a high-rate lithium titanate battery and a production method thereof. The lithium titanate battery comprises a positive plate,a negative plate, a separator, an electrolyte and an outer package. A carbon-coated aluminum foil current collector is coated with positive and negative active substances, a binder and a conductive agent, lamination, packaging and injection are performed by use of the special high-porosity separator and the high-rate electrolyte system, the high-rate lithium titanate battery is prepared with high-temperature and high-pressure formation and aging technologies, and the problems of long charge time, poor rate charge and discharge performance and low safety of the lithium titanate battery are effectively solved.

Description

Technical field [0001] The invention relates to the field of lithium batteries, in particular to a high-rate lithium titanate battery and a manufacturing method thereof. Background technique [0002] At present, the energy crisis has become the most serious problem in the 21st century, and it has become an inevitable development trend that non-renewable fossil energy will be replaced by green energy. Lithium-ion batteries have the advantages of high energy density, long cycle life, and environmental protection. They have occupied an important position in the energy storage equipment market. They are used in a variety of portable mobile devices, such as mobile phones, cameras, and laptops. It is gradually applied to large electric equipment such as electric bicycles (Ebike), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and pure electric vehicles (EV). [0003] Since 2017, new energy buses are still showing a growing trend. At present, the mainstream mark...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0567H01M2/16H01M10/058H01M50/411
CPCH01M10/0525H01M10/0567H01M10/058H01M2300/0037H01M50/411Y02E60/10Y02P70/50
Inventor 胡金星张宝华娄勇刚郑康方坤罗伟龙
Owner CAMEL GRP NEW ENERGY BATTERY CO LTD
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