Glass fiber battery membrane and preparation method thereof
A technology of glass fiber and battery diaphragm, which is applied in the direction of battery pack parts, circuits, electrical components, etc., and can solve the problems of easy breakage of batteries, resistance to folding, and low yield
Active Publication Date: 2014-01-01
NANJING FIBERGLASS RES & DESIGN INST CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At present, the tensile strength of glass fiber chopped strand separators on the market can only reach 12N (15mm wide sample), and most of them are made of microfiber glass wool and / or alkali-free chopped strands or other organic fibers, so they are not resistant to folding. It is easy to break when making batteries, and the yield is low. It is hoped that the tensile strength of the glass fiber separator can reach more than 15N (15mm wide sample), and the thickness should not exceed 0.20mm, preferably 0.16-0.18mm
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] at 2m 3 Add 2m to the hydropulper 3 White water for circulation with pH=2.5-3.5 (if adding tap water, adjust the pH value of the water to between 2.5-3.5).
[0018] Weigh 10kg of chopped E-glass fiber with a diameter of 3μm and a length of 6mm and 5kg of chopped E-glass fiber with a diameter of 7μm and a length of 12mm. After mixing, add 2m 3 Beat in a hydropulper for 10 minutes, then add 1 kg of PET chopped strands with a diameter of 12 μm and a length of 4 mm and beat for another 2 minutes. At this time, the slurry concentration was 0.794%.
[0019] Pump the thick slurry with a concentration of 0.794% to 35m 3 Add the white water for circulation (PH=2.5-3.5) to the slurry mixing tank for 35m 3 Tick marks, prepared as a thin slurry with a concentration of 0.457%.
[0020] While pumping the dilute slurry with a concentration of 0.457%, add white water 4 times the volume of the slurry, and then pump it to the forming net together. At this time, the concentration o...
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
| Property | Measurement | Unit |
|---|---|---|
| glass transition temperature | aaaaa | aaaaa |
| viscosity | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a glass fiber battery membrane and a preparation method thereof. The preparation method of the glass fiber battery membrane comprises the steps of: preparing wet paper sheets by 2-3 types of non-alkali glass fiber chopped strands with specifications of 3 mum*6 mm, 3 mum*9 mm, 3 mum*12 mm, 7 mum*6 mm, 7 mum*9 mm and 7 mum*12 mm, and 1-3 types of organic fiber chopped strands of PET with specifications of 12 mum*4 mm, 12 mum*12 mm, 20 mum*4 mm and 20 mum*12 mm, or / and PA with specifications of 12 mum*4 mm and 12 mum*12 mm; and then, treating and drying the wet paper sheets to obtain the glass fiber battery membrane, wherein the organic fiber chopped strands are PET (polyester) fibers or PA (polyamide) fibers; and in the glass fiber chopped strands and the organic fiber chopped strands, the mass percents of the glass fiber chopped strands and the organic fiber chopped strands are respectively 93.75-81.25% and 6.25-18.75%.
Description
technical field [0001] The invention relates to a glass fiber battery diaphragm and a preparation method thereof. Background technique [0002] The glass fiber separator can be used as a separator for lead-acid batteries, primary lithium batteries, etc., to isolate the positive and negative electrodes of the battery to prevent short circuits, and to absorb a sufficient amount of electrolyte for chemical reactions during battery charge and discharge. The materials used to make the diaphragm include plant fibers, organic fibers, glass fibers or mixed fibers of these fibers, etc., and the glass fibers are divided into microfiber glass wool and glass fiber chopped strands. The diameter of microfiber glass wool is 0.2-1.5 μm, while the diameter of glass fiber chopped strands is generally 3-13 μm. The diaphragm made of microfiber glass wool has high porosity and high liquid absorption rate, but low strength. The strength of microfiber glass wool diaphragm is much worse than that...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16
CPCY02E60/12Y02E60/10
Inventor 王志明
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD