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

Electrode plate, electrode plate fabrication method and lithium ion battery

A technology of electrode pole pieces and pole pieces, which is applied in the direction of battery electrodes, secondary batteries, secondary battery repair/maintenance, etc., can solve problems such as thermal runaway of battery cells, short circuit of lithium-ion batteries, etc., to reduce internal resistance of battery cells, Improved nail piercing effect and high safety performance

Inactive Publication Date: 2019-05-21
CONTEMPORARY AMPEREX TECH CO
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above scheme of coating the surface of the cathode, anode or separator with a ceramic coating will still cause an internal short circuit in the lithium-ion battery due to burrs formed by cutting and sharp objects piercing the lithium-ion battery during production, transportation, and use. , leading to thermal runaway of the cell

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
  • Electrode plate, electrode plate fabrication method and lithium ion battery
  • Electrode plate, electrode plate fabrication method and lithium ion battery
  • Electrode plate, electrode plate fabrication method and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] In the cathode pole piece, the aluminum foil adopts a fixed width of 80mm and a thickness of 60μm, and the cathode pole piece adopts figure 1 The electrode pole piece shown, wherein, using polyvinylidene fluoride as a binder, acetylene black as a conductive agent, using N-methylpyrrolidone as an organic solvent, polyvinylidene fluoride, acetylene black and N-methylpyrrolidone The mass ratio is 1:1:8, mixed and stirred to form a colloid, and the colloid is coated on the surface of the aluminum foil and dried to form a conductive adhesive layer. The thickness of the conductive adhesive layer is 6 μm, and the width of the conductive adhesive layer is The resistivity of the conductive adhesive layer is 1 Ω·cm, and the adhesive force between the conductive adhesive layer and the aluminum foil is 150 N / m.

Embodiment 2

[0060] On the basis of Example 1, the width of the first region on the first surface of the current collector was changed, the width of the conductive adhesive layer was adjusted from 35mm to 45mm, and the widths of the two second regions were respectively reduced by 5mm. Other manufacturing specifications are consistent with embodiment 1.

Embodiment 3

[0062] On the basis of Example 1, the thickness of the conductive adhesive layer was changed, and the thickness of the conductive adhesive layer was increased from 6 μm to 9 μm. Other manufacturing specifications are consistent with embodiment 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
Thicknessaaaaaaaaaa
Resistivityaaaaaaaaaa
Adhesionaaaaaaaaaa
Login to View More

Abstract

The invention relates to an electrode plate, an electrode plate fabrication method and a lithium ion battery. The electrode plate comprises a current collector, a conductive binding agent layer and anactive substance material layer, wherein the current collector comprises a first surface and a second surface which are opposite to each other, the conductive substance material layer is arranged onat least one of the first surface and the second surface, the thickness of the conductive substance material layer is 6-9 micrometers, the conductive substance material layer comprises a conductive agent and a binding agent with a mass ratio being (1:2)-(2:1) so that the resistivity of the conductive binding agent layer is (1-3) ohm.cm and the binding force of the current collector is (150-200)N / m, and the active substance material layer is arranged on the conductive binging agent layer. With the electrode plate, the electrode plate fabrication method and the lithium ion battery, provided by the invention, the probability of thermal runaway of a battery cell can be remarkably reduced, the safety of the battery cell is improved, and the electrode plate is simultaneously compatible with favorable electrical performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to an electrode pole piece, a preparation method of the electrode pole piece and a lithium ion battery. Background technique [0002] With the widespread application of lithium-ion batteries, their safety performance is one of the properties that consumers are very concerned about, and it is also a very difficult problem to solve. At present, the new technology adopted in the safety performance of lithium-ion batteries includes coating ceramics on the surface of the cathode, anode or separator to block the direct contact between the cathode and the anode, thereby improving the safety performance of the lithium-ion battery. [0003] However, the above scheme of coating the surface of the cathode, anode or separator with a ceramic coating will still cause an internal short circuit in the lithium-ion battery due to burrs formed by cutting and sharp objects piercing the li...

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
IPC IPC(8): H01M4/13H01M4/139H01M10/0525H01M10/42
CPCY02E60/10
Inventor 林明翔龙熙桂张小细
Owner CONTEMPORARY AMPEREX TECH CO