Preparation method of lithium ion battery diaphragm, lithium ion battery diaphragm and lithium ion battery
A technology for lithium-ion batteries and diaphragms, applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as inability to ensure that the slurry is completely consistent, troublesome adjustment of the proportion of slurry, and decreased gas permeability of the diaphragm. Large-scale industrial production, excellent uniformity and consistency, and the effect of reducing thermal shrinkage
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0038] In the first aspect, in some embodiments, a method for preparing a lithium ion battery separator is provided, which includes the following steps:
[0039] Fix the base material in the unwinding mechanism in the vacuum reaction chamber, and pass the optional coating material plasma gas into the vacuum reaction chamber;
[0040] Use vapor deposition equipment to vaporize the coating material into the vacuum reaction chamber, and deposit the coating material on the base material by vapor deposition;
[0041] The base material with the coating material deposited on the surface is collected in the winding mechanism;
[0042] Wherein, a cooling roll is also provided between the unwinding mechanism and the winding mechanism, and the cooling roll is located above the vapor deposition device to prevent the base material from being deformed by heating.
[0043] The preparation method of the present invention uses vapor deposition technology to vaporize and diffuse the coating material into...
Example Embodiment
[0077] Example 1
[0078] figure 1 It is a schematic diagram of the process principle of the preparation method of the lithium ion battery separator provided by the embodiment of the present invention, such figure 1 As shown, the preparation method of the lithium ion battery diaphragm includes an unwinding mechanism, a cooling roller, a vapor deposition device, and a winding device in a vacuum reaction chamber, wherein the cooling roller is located between the unwinding mechanism and the winding mechanism, And located directly above the vapor deposition equipment;
[0079] The process of preparing the diaphragm using the above device includes: fixing the base material in the unwinding mechanism, and injecting the optional coating material plasma gas into the vacuum reaction chamber; after adjusting a certain degree of vacuum and other coating parameters, turning on the unwinding mechanism And winding mechanism, continuous coating according to a certain linear speed;
[0080] Use v...
Example Embodiment
[0090] Example 2
[0091] A method for preparing a lithium ion battery separator, which is different from Example 1 in:
[0092] In this embodiment, the base material is PP and the coating material is Al 2 O 3 , The plasma gas is O 2 , The coating method adopts chemical vapor deposition (CVD);
[0093] The vacuum degree of the vacuum reaction chamber is 1×10 -3 Pa, heating temperature is 1250℃;
[0094] The thickness of the base material is 12-25 μm, and the thickness of the coating is 1nm-115nm.
[0095] In this embodiment, the coated lithium ion battery separator is obtained. In terms of mechanical properties, the thermal shrinkage rate is reduced by 0.1% to 15%, and the Gurley value used to characterize the gas permeability is increased by 0 to 20.
[0096] In terms of electrochemical performance: the diaphragm surface resistance is reduced by 4%-20%, and the electrolyte retention rate is increased by 20-40%.
[0097] Applying the lithium-ion battery separator of this implementation t...
PUM
Property | Measurement | Unit |
---|---|---|
Thickness | aaaaa | aaaaa |
Thickness | aaaaa | aaaaa |
Thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap