Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-energy-consumption high-efficiency vacuum baking process for lithium battery positive plate

A baking process and positive electrode technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, drying, etc., can solve the problems of residual moisture in the vacuum baking of the pole pieces, poor drying ability of the vacuum oven, and high efficiency, and achieve reduction The number of oven configurations, the effect of reducing energy consumption and reducing pressure

Pending Publication Date: 2020-10-16
苏州合乾新能源科技有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a low-energy and high-efficiency vacuum baking process for the positive electrode of lithium batteries, which is used to solve the problem of residual moisture in the vacuum baking of the electrode in the prior art. And the problem of poor drying ability of vacuum oven, the vacuum baking process provided has the advantages of low energy consumption, high efficiency and less moisture residue

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

[0025] A low-energy-consumption and high-efficiency vacuum baking process for lithium battery positive plates, comprising the following steps:

[0026] Step 1. Put the lithium battery positive electrode into the vacuum baking chamber, and vacuum the vacuum baking chamber within 14 minutes until the pressure of the vacuum baking chamber is 2.2 Torr;

[0027] Step 2. Fill the vacuum baking chamber with nitrogen gas within 10 minutes until the pressure of the vacuum baking chamber is 750 Torr, and then raise the temperature to 128°C at a heating rate of 2°C / min;

[0028] Step 3. Vacuumize the vacuum baking chamber at a temperature of 128°C until the pressure of the vacuum baking chamber is 2.2 Torr. At this time, the pressure value of the vacuum baking chamber is recorded as the initial pressure value, and the positive plate of the lithium battery is Vacuum baking for 45 hours. During the vacuum baking process, the moisture in the vacuum baking cavity is drawn out every 2.5 hours...

Embodiment 2

[0032] A low-energy-consumption and high-efficiency vacuum baking process for lithium battery positive plates, comprising the following steps:

[0033] Step 1. Put the lithium battery positive electrode into the vacuum baking chamber, and vacuum the vacuum baking chamber within 16 minutes until the pressure of the vacuum baking chamber is 1.8 Torr;

[0034] Step 2. Fill the vacuum baking chamber with nitrogen gas within 20 minutes until the pressure of the vacuum baking chamber is 770 Torr, and then raise the temperature to 136°C at a heating rate of 2°C / min;

[0035] Step 3. Vacuum the vacuum baking chamber at a temperature of 136°C until the pressure of the vacuum baking chamber is 1.8-2.2 Torr. At this time, the pressure value of the vacuum baking chamber is recorded as the initial pressure value, and the lithium battery The positive electrode piece is vacuum baked for 50 hours. During the vacuum baking process, the moisture in the vacuum baking cavity is drawn out every 1....

Embodiment 3

[0039] A low-energy-consumption and high-efficiency vacuum baking process for lithium battery positive plates, comprising the following steps:

[0040] Step 1. Put the lithium battery positive electrode into the vacuum baking chamber, and vacuum the vacuum baking chamber within 15 minutes until the pressure of the vacuum baking chamber is 2.0 Torr;

[0041] Step 2: Fill the vacuum baking chamber with nitrogen gas within 20 minutes until the pressure of the vacuum baking chamber is 760 Torr, and then raise the temperature to 130°C at a heating rate of 3°C / min;

[0042]Step 3. Vacuum the vacuum baking chamber at a temperature of 130°C until the pressure of the vacuum baking chamber is 2.0 Torr. At this time, the pressure value of the vacuum baking chamber is recorded as the initial pressure value, and the lithium battery positive plate Vacuum baking for 48 hours. During the vacuum baking process, the moisture in the vacuum baking cavity is drawn out every 1.5 hours. The time for...

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

No PUM Login to View More

Abstract

The invention relates to the technical field of lithium battery drying processes, in particular to a low-energy-consumption high-efficiency vacuum baking process for a lithium battery positive plate.The process comprises the following steps that a cavity is vacuumized to 1.8-2.2 Torr; nitrogen is introduced into a vacuum baking cavity, and the temperature is raised to 128-136 DEG C; the cavity isvacuumized to 1.8-2.2 Torr, the lithium battery positive plate is subjected to vacuum baking for 45-50 h, and water in the vacuum baking cavity is pumped out every 1.5-2.5 h in the vacuum baking process; and the vacuum baking cavity is cooled, and the process is completed after the vacuum is broken. The low-energy-consumption high-efficiency vacuum baking process solves the problems that in the prior art, a large amount of moisture remains in pole piece vacuum baking and the drying capacity of a vacuum oven is poor, and the vacuum baking process has the advantages of being low in energy consumption, high in efficiency and small in moisture residue.

Description

technical field [0001] The invention relates to the technical field of lithium battery drying technology, in particular to a low-energy-consumption and high-efficiency vacuum baking process for lithium battery positive plates. Background technique [0002] With the upgrading of mobile devices, consumers have also put forward higher requirements for the performance of lithium-ion batteries, which promotes the continuous development of lithium-ion battery technology. Generally, lithium-ion batteries are expected to be smaller, lighter, and have more energy storage. These Demands are also driving the research on lithium-ion batteries to continue to advance. From the perspective of battery structure and the adoption of new materials and systems, the high price of lithium-ion batteries affects commercial applications, especially in the field of power batteries that are very sensitive to prices. Lithium-ion battery researchers continue to try various methods to reduce the cost of ...

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): F26B5/04F26B21/14H01M10/058
CPCF26B5/04F26B21/14H01M10/058Y02E60/10Y02P70/50
Inventor 王行龙
Owner 苏州合乾新能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com