Ultralow-temperature high-rate lithium ion battery and preparation method thereof
A lithium-ion battery, high-rate technology, applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problems of reduced charge and discharge capacity, achieve the effects of reducing impedance, reducing freezing point, and enhancing low-temperature performance
Pending Publication Date: 2021-12-14
鹤壁市诺信电子有限公司
View PDF0 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to provide an ultra-low temperature high-rate lithium ion battery and its preparation method to solve the problem that the charge and discharge capacity of the lithium ion battery is greatly reduced in a low temperature environment
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] The present embodiment provides a positive electrode slurry for an ultra-low temperature high rate lithium-ion battery, the composition of which is as follows: take 95Kg of LiFePO 4 , 1Kg conductive carbon black, 1Kg magnetic carbon nanotubes, 2Kg polytetrafluoroethylene, 1Kg N-methylpyrrolidone, add 100Kg deionized water and stir evenly.
Embodiment 2
[0037] The present embodiment provides a kind of cathode slurry of ultra-low temperature high rate lithium ion battery, and its composition is as follows: take 96Kg LiMn 2 o 4 , 1Kg conductive carbon black, 2Kg polytetrafluoroethylene, 1Kg N-methylpyrrolidone, add 100Kg deionized water and stir evenly.
Embodiment 3
[0039] This embodiment provides a positive electrode slurry for an ultra-low temperature high-rate lithium-ion battery, the composition of which is as follows: take 97Kg of LiCoO 2 , 0.5Kg conductive carbon black, 0.5Kg magnetic carbon nanotubes, 0.5Kg polyvinylidene fluoride, 1Kg N-methylpyrrolidone, add 100Kg deionized water and stir evenly.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Length | aaaaa | aaaaa |
| Density | aaaaa | aaaaa |
| Compaction density | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses an ultralow-temperature high-rate lithium ion battery and a preparation method thereof, and belongs to the technical field of lithium batteries, a positive electrode slurry of the ultralow-temperature high-rate lithium ion battery comprises a positive electrode active material, a positive electrode conductive agent and a positive electrode binder, and a negative electrode slurry of the ultralow-temperature high-rate lithium ion battery comprises a negative electrode active material, a negative electrode conductive agent, a negative electrode binder and a negative electrode thickening agent; the positive / negative electrode conductive agent contains magnetic carbon nanotubes, so that the low-temperature conductivity of the electrode can be enhanced, and the capacity loss of the lithium battery in a low-temperature environment is reduced; the invention also provides a preparation method of the ultralow-temperature high-rate lithium ion battery, which comprises the following steps of: coating corresponding current collectors with the positive / negative electrode slurry and carrying out processes of rolling and tabletting, lamination, welding, liquid injection, packaging, formation and the like to obtain the ultralow-temperature high-rate lithium ion battery. By adopting the magnetic carbon nanotubes with good extensibility, the impedance of the electrode is reduced, so that the capacity loss of the lithium ion battery in a low-temperature environment is reduced.
Description
technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to an ultra-low temperature and high-rate lithium-ion battery and a preparation method thereof. Background technique [0002] Lithium battery is a battery that uses metal lithium or lithium alloy, lithium alloy metal oxide as positive and negative electrode materials, and uses non-aqueous electrolyte as electrolyte. It is generally divided into two types: lithium metal battery and lithium ion battery. Alloy metal oxides are lithium-ion batteries, which are currently the most widely used lithium batteries on the market. [0003] Compared with lead-acid batteries, lithium batteries have the advantages of high energy density and no memory effect, so they are widely used in vehicle power batteries. The proportion of sales of new energy vehicles such as electric vehicles is increasing year by year, and the demand for power batteries continues to increase, and will continue...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H01M4/62H01M10/0525H01M10/0567H01M10/058H01M10/42B82Y30/00
CPCH01M4/625H01M10/0567H01M10/058H01M10/0525H01M10/4235B82Y30/00Y02E60/10Y02P70/50
Inventor 高巧娟郭峰
Owner 鹤壁市诺信电子有限公司