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

A new type of colored lithium-ion battery separator and its preparation process

A technology for lithium ion batteries and separators, which is applied in the field of new colored lithium ion battery separators and their preparation processes, can solve the problems that the coated lithium battery separator cannot detect the coating effect and the color of the separator is single.

Active Publication Date: 2016-04-20
QINGDAO LANKETU MEMBRANE MATERIALS CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the separator in the prior art has a single color, and when a ceramic coating is applied on it, the coated lithium battery separator cannot detect the coating effect

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a novel colored lithium-ion battery diaphragm, the preparation method comprising the following steps:

[0025] Step 1, batching step: Weigh 40Kg of UHMWPE powder, 1Kg of macromolecular orange 4R and 80Kg of white oil, and mix them well to obtain a mixture;

[0026] Step 2. Extrusion and compound molding steps: the mixture obtained in step a is passed through a twin-screw extruder to obtain a uniform high-temperature melt, and the high-temperature melt is accurately measured by a melt pump and then entered into an extrusion die for molding;

[0027] Step 3, casting, cooling and shaping steps: the high-temperature melt flowing out from the slit of the die head passes through four chilled rollers with temperatures of 50°C-40°C-30°C-30°C in sequence to obtain extruded cast pieces;

[0028] Step 4, two-way synchronous stretching step: the extruded cast sheet enters a bidirectional synchronous stretching machine to obtain an oil-containing film with a ...

Embodiment 2

[0033] The difference from Example 1 is:

[0034] Step 1, batching step: Weigh 15Kg of UHMWPE powder, 5Kg of macromolecular red R and 55Kg of white oil, and mix them well to obtain a mixture.

[0035] The resulting Li-ion battery separator was red in color.

Embodiment 3

[0037] The difference from Example 1 is:

[0038] Step 1, batching step: Weigh 30Kg of UHMWPE powder, 2.5Kg of phthalocyanine red and 70Kg of white oil, and mix them well to obtain a mixture.

[0039] The resulting lithium-ion battery separator exhibited a purple color.

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
flash pointaaaaaaaaaa
kinematic viscosityaaaaaaaaaa
pour pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a novel colored lithium-ion battery diaphragm and a preparation process thereof, belonging to the field of battery diaphragms. It solves the problem that the effect of the coating cannot be judged when the ceramic coating is coated on the diaphragm. The lithium ion battery separator of the present invention comprises the following raw materials according to weight percentage: 15% to 40% polyethylene, 1% to 5% nano-scale pigment and 55% to 80% white oil, and the preparation process includes in turn: ingredients -Extrusion, compound molding-cast sheet cooling, shaping-two-way simultaneous stretching, extraction drying, horizontal stretching and online winding and other steps. Because the present invention adds nano-scale pigments to the raw materials, the finished diaphragm presents different colors, and when the ceramic coating is coated on it, the coating effect can be judged according to the color difference of the coated diaphragm.

Description

technical field [0001] The invention belongs to the field of battery diaphragms, and in particular relates to a novel colored lithium-ion battery diaphragm and a preparation process thereof. Background technique [0002] In recent years, as a high specific energy power source, lithium-ion batteries have been widely used in fields such as portable electronic devices, electric tools, electric vehicles, and energy storage power stations. Diaphragm is one of the important raw materials for batteries. Therefore, lithium The safety of ion batteries has always been a concern. As an important part of the lithium-ion battery, the diaphragm is used to separate the positive electrode from the negative electrode material, allowing ions to pass through and preventing electrons from passing through. The performance of the lithium battery diaphragm determines the interface structure and internal resistance of the battery, which directly affects the capacity of the battery. , cycle and saf...

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): H01M2/16H01M50/403H01M50/411
CPCH01M10/0525H01M50/411Y02E60/10
Inventor 任富忠丁交通王志凯赵建敏姚丽萍郅立鹏陈继朝
Owner QINGDAO LANKETU MEMBRANE MATERIALS CO LTD