Unlock instant, AI-driven research and patent intelligence for your innovation.

capsules and lithium-ion batteries

A lithium-ion battery, capsule technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as safety performance impact and harsh working environment, and achieve the effect of improving safety performance

Active Publication Date: 2017-04-05
CONTEMPORARY AMPEREX TECH CO
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working environment of lithium-ion battery as a vehicle power supply is quite harsh, and it needs to be operated in a high-temperature environment for a long time, and its safety performance is significantly affected

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • capsules and lithium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of capsules

[0030] Polyurea as the material of the capsule wall and propylene tricarbonate (PC) as the material of the capsule core were uniformly mixed by in-situ polymerization, acidified with NH4Cl as an acidic catalyst for 3 hours, and the final pH value was 2.0, and then styrene- Maleic anhydride was used as an emulsifier, continued to stir vigorously (rotation speed greater than 2000r / min), and then solidified at 70°C for 2 hours to obtain fluid spherical solid capsules with a median particle size of 100 μm and a wall thickness of 5 μm.

[0031] (2) Preparation of lithium-ion batteries

[0032]A Preparation of the positive pole piece: Mix the positive active material nickel cobalt lithium manganese oxide, the binder polyvinylidene fluoride (PVDF), the conductive agent conductive carbon black with the solvent N-methylpyrrolidone in a mass ratio of 90:5:5, A uniformly dispersed positive electrode slurry was obtained by high-speed stirring, and the...

Embodiment 2

[0037] (1) Preparation of capsules

[0038] Using the in-situ polymerization method, the polyamide as the material of the capsule wall and the propylene carbonate (PC) as the material of the capsule core are uniformly mixed, acidified with NH4Cl as an acidic catalyst for 4 hours, and the final pH value is 2.0, and then styrene-mass is added. Tonic anhydride was used as an emulsifier, and the mixture was continuously stirred vigorously (rotating speed greater than 2000r / min), and then solidified at 70°C for 2 hours to obtain fluid spherical solid capsules with a median particle size of 30 μm and a wall thickness of 0.5 μm.

[0039] (2) Preparation of lithium-ion batteries

[0040] Except that the capsule prepared in this example (i.e. Example 2) is used and the mass percentage of the capsule relative to the electrolyte solution is 20%, the rest is the same as Example 1.

Embodiment 3

[0042] (1) Preparation of capsules

[0043] Stir and mix the gelatin as the material of the capsule wall and the fluoropyridine as the material of the capsule core under the condition of 70°C / 3MPa, then add Span 80 and glutaraldehyde, continue to stir and mix evenly, and finally mix them at 30°C Cooling under the condition of / 3MPa, a fluid spherical solid capsule with a median particle size of 300 μm and a wall thickness of 50 μm was obtained.

[0044] (2) Preparation of lithium-ion batteries

[0045] Except that the capsule prepared in this example (i.e. Example 3) is used and the mass percentage of the capsule relative to the electrolyte solution is 30%, the rest is the same as that of Example 1.

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a capsule and a lithium ion battery, wherein the capsule is accommodated in the lithium ion battery and includes a capsule wall and a capsule core. A negative electrode pole piece of the lithium ion battery includes a negative pole active substance being graphite. A material of the capsule wall is 90-160 in melting point and is insoluble in the electrolyte of the lithium ion battery. A material of the capsule core is liquid in phase, and the gasification temperature of the material is higher than the melting point of the material of the capsule wall. When the capsule wall is heated and molten and broken, the liquid-phase capsule core is released, by that the capsule core and the graphite in the negative electrode pole piece are subjected to a co-embedded-in reaction, thereby stripping graphite and further improving the safety performance of the lithium ion battery. The lithium ion battery comprises the capsule.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a capsule and a lithium ion battery. Background technique [0002] The application of lithium-ion batteries in the field of new energy vehicles is becoming more and more widespread. However, the reports of lithium-ion battery safety accidents have also increased significantly. Therefore, the safety performance of lithium-ion batteries has received more and more attention. The working environment of lithium-ion battery as a vehicle power supply is quite harsh, and it needs to operate in a high-temperature environment for a long time, and its safety performance is significantly affected. In fact, the safety mechanism of lithium-ion batteries is very complex, involving almost all the components of lithium-ion batteries, namely the positive pole piece, negative pole piece, separator and electrolyte, and even its structural design. Therefore, the industry has been trying to improve the above...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/42
CPCY02E60/10
Inventor 陈小波
Owner CONTEMPORARY AMPEREX TECH CO