CN114142158A - AGM diaphragm for winding battery and preparation method thereof - Google Patents
AGM diaphragm for winding battery and preparation method thereof Download PDFInfo
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- CN114142158A CN114142158A CN202111474031.7A CN202111474031A CN114142158A CN 114142158 A CN114142158 A CN 114142158A CN 202111474031 A CN202111474031 A CN 202111474031A CN 114142158 A CN114142158 A CN 114142158A
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- glass fiber
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- agm
- battery
- diaphragm
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- 238000004804 winding Methods 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000003365 glass fiber Substances 0.000 claims abstract description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002808 molecular sieve Substances 0.000 claims abstract description 25
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000004965 Silica aerogel Substances 0.000 claims abstract description 12
- 239000004964 aerogel Substances 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 8
- 230000018044 dehydration Effects 0.000 claims description 20
- 238000006297 dehydration reaction Methods 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 14
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 10
- 230000008595 infiltration Effects 0.000 claims description 10
- 238000001764 infiltration Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 13
- 239000011148 porous material Substances 0.000 abstract description 8
- 210000001787 dendrite Anatomy 0.000 abstract description 2
- 238000007598 dipping method Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 238000003860 storage Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Separators (AREA)
Abstract
The invention relates to an AGM diaphragm for a wound battery and a preparation method thereof, belonging to the technical field of battery diaphragms. The thickness of the coating is 0.6-1.5 mm, and the coating comprises the following components in parts by weight: 85-95 parts of glass fiber, 3-5 parts of silicon dioxide aerogel and 4-6 parts of molecular sieve. The AGM diaphragm for the winding battery uses needle-shaped glass fiber, needle-shaped objects are in staggered lap joint during molding, and a wet paper web formed after lap joint contains a large number of pores. And fine silica aerogel and ground molecular sieves are mixed into pores in a dipping mode, so that the pores of the original diaphragm are effectively filled, the pore size is reduced, short circuit of lead dendrites can be prevented, and the cycle life of the battery is prolonged. Meanwhile, aerogel and molecular sieve are added, so that the acid absorption of the diaphragm is improved, the acid absorption performance is good, the internal resistance of the battery is small, and enough electrolyte can be absorbed to ensure the large-capacity discharge of the battery.
Description
Technical Field
The invention relates to the technical field of battery separators, in particular to an AGM separator for a wound battery and a preparation method thereof.
Background
In recent years, under the pressure of energy and environmental protection, the development of new energy and application is promoted. Under the promotion of renewable energy sources such as solar energy and wind energy and emerging markets such as smart grids and electric vehicles, a new breakthrough progress is needed in the battery technology which is one of main components of the solar cell battery. Lead-acid batteries are expected to be developed more greatly due to their advantages of mature technology, low price, abundant resources, recyclability, etc.
The technology of the lead-acid battery is continuously developed in recent years, and the winding battery is a product which is developed faster in recent years, and is different from a common lead-acid storage battery flat plate lamination structure.
According to the structural characteristics of the wound lead-acid storage battery, the pole plates of the battery need to be made very thin, so that the used diaphragm of the battery is greatly different from that of a common superfine glass fiber (AGM) battery: the diaphragm made of the fine glass fiber has small aperture and is obviously better than the diaphragm made of the coarse fiber in the aspect of puncture resistance; along with the thickening of the diameter of the glass fiber yarns forming the diaphragm, the liquid absorption amount of the diaphragm is increased, the faster the acid liquid diffusion speed is, the better the acid liquid layering capacity is; the larger the diameter of the glass fiber yarn is, the better the resilience performance of the diaphragm after imbibing liquid is, and the better the pressure resistance is, so the diaphragm adopted by the winding lead-acid storage battery is a composite diaphragm, and the existing AGM diaphragm can not meet the requirements.
Disclosure of Invention
Aiming at the problem that the AGM diaphragm in the prior art cannot meet the requirements of a winding type lead-acid storage battery, the invention provides the AGM diaphragm for the winding battery and a preparation method thereof, and aims to solve the technical problem.
The technical scheme of the invention is as follows:
an AGM separator for a wound battery, which has a thickness of 0.6-1.5 mm, comprises the following components in parts by weight: 85-95 parts of glass fiber, 3-5 parts of silicon dioxide aerogel and 4-6 parts of molecular sieve.
Preferably, the composition comprises the following components in parts by weight: 92 parts of glass fiber, 4 parts of silicon dioxide aerogel and 4 parts of molecular sieve.
Preferably, the glass fiber is a mixture comprising fine high-alkali glass fiber and coarse high-alkali glass fiber, wherein the weight ratio of the fine high-alkali glass fiber to the coarse high-alkali glass fiber is 4: 6-6: 4.
Preferably, the diameter of each filament of the fine high alkali glass fiber is 0.5-0.8 μm, and the length of each filament of the fine high alkali glass fiber is 0.5-1.2 mm.
Preferably, the diameter of each filament of the coarse high-alkali glass fiber is 1.2-2.0 μm, and the length of each filament of the coarse high-alkali glass fiber is 0.5-1.2 mm.
Preferably, the particle size of the molecular sieve is 200-300 meshes.
Another object of the present invention is to provide a method of preparing an AGM separator, comprising the steps of:
(1) putting the mixed glass fiber and water into a fluffer I, and fluffing for 10-12 min; adding a first dispersing agent for dispersing to ensure that the fibers are uniformly dispersed;
(2) the slurry after being dispersed evenly is subjected to gravity dehydration in a forming part to obtain a wet paper web with high water content;
(3) adding the silica aerogel and the ground molecular sieve into a second fluffer, adding water and a dispersant, and uniformly dispersing;
(4) immersing the wet paper web prepared in the step (2) into the uniformly dispersed silica aerogel and molecular sieve suspension liquid in the step (3) for infiltration treatment; performing gravity dehydration, moisture absorption vacuum dehydration and forced vacuum dehydration on the wet paper web after infiltration;
(5) and drying, cutting and reeling the dehydrated wet paper web to obtain the AGM diaphragm for the wound battery.
Preferably, the first dispersant and the second dispersant are both 75-98% of sulfuric acid; the mass ratio of the addition amount of the first dispersing agent to the glass fiber is 1: 20-40.
Preferably, the drying temperature in the step (5) is 140-170 ℃.
The invention has the beneficial effects that:
the AGM diaphragm for the winding battery uses needle-shaped glass fiber, needle-shaped objects are in staggered lap joint during molding, and a wet paper web formed after lap joint contains a large number of pores. And fine silica aerogel and ground molecular sieves are mixed into pores in a dipping mode, so that the pores of the original diaphragm are effectively filled, the pore size is reduced, short circuit of lead dendrites can be prevented, and the cycle life of the battery is prolonged. Meanwhile, aerogel and molecular sieve are added, so that the acid absorption of the diaphragm is improved, the acid absorption performance is good, the internal resistance of the battery is small, and enough electrolyte can be absorbed to ensure the large-capacity discharge of the battery. The aerogel and the molecular sieve added in the diaphragm can also effectively improve the resilience of the diaphragm, and the diaphragm is not easy to damage in the installation and replacement processes.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An AGM separator for a wound battery, which has a thickness of 0.8mm and comprises the following components in parts by weight: 85 parts of glass fiber, 3 parts of silicon dioxide aerogel and 6 parts of molecular sieve.
(1) Putting the mixed glass fiber and water into a fluffer I, and fluffing for 10 min; then adding 4 parts of 85% sulfuric acid for dispersing to ensure that the fibers are uniformly dispersed;
(2) the slurry after being dispersed evenly is subjected to gravity dehydration in a forming part to obtain a wet paper web with high water content;
(3) adding the silica aerogel and the ground molecular sieve into a second fluffer, adding water and 0.5 part of 85 percent sulfuric acid, and uniformly dispersing;
(4) immersing the wet paper web prepared in the step (2) into the uniformly dispersed silica aerogel and molecular sieve suspension liquid in the step (3) for infiltration treatment; performing gravity dehydration, moisture absorption vacuum dehydration and forced vacuum dehydration on the wet paper web after infiltration;
(5) and drying, cutting and coiling the dehydrated wet paper web at 140 ℃ to obtain the AGM diaphragm for the wound battery.
Example 2
An AGM separator for a wound battery, which has a thickness of 1.2mm, comprises the following components in parts by weight: 92 parts of glass fiber, 4 parts of silicon dioxide aerogel and 4 parts of molecular sieve.
(1) Putting the mixed glass fiber and water into a fluffer I, and fluffing for 10 min; then adding 4 parts of 85% sulfuric acid for dispersing to ensure that the fibers are uniformly dispersed;
(2) the slurry after being dispersed evenly is subjected to gravity dehydration in a forming part to obtain a wet paper web with high water content;
(3) adding the silica aerogel and the ground molecular sieve into a second fluffer, adding water and 0.5 part of 85 percent sulfuric acid, and uniformly dispersing;
(4) immersing the wet paper web prepared in the step (2) into the uniformly dispersed silica aerogel and molecular sieve suspension liquid in the step (3) for infiltration treatment; performing gravity dehydration, moisture absorption vacuum dehydration and forced vacuum dehydration on the wet paper web after infiltration;
(5) and drying, cutting and reeling the dehydrated wet paper web at 160 ℃ to obtain the AGM diaphragm for the wound battery.
Example 3
An AGM separator for a wound battery, which has a thickness of 1.5mm, comprises the following components in parts by weight: 95 parts of glass fiber, 5 parts of silicon dioxide aerogel and 5 parts of molecular sieve.
(1) Putting the mixed glass fiber and water into a fluffer I, and fluffing for 12 min; then adding 4 parts of 85% sulfuric acid for dispersing to ensure that the fibers are uniformly dispersed;
(2) the slurry after being dispersed evenly is subjected to gravity dehydration in a forming part to obtain a wet paper web with high water content;
(3) adding the silica aerogel and the ground molecular sieve into a second fluffer, adding water and 0.5 part of 85 percent sulfuric acid, and uniformly dispersing;
(4) immersing the wet paper web prepared in the step (2) into the uniformly dispersed silica aerogel and molecular sieve suspension liquid in the step (3) for infiltration treatment; performing gravity dehydration, moisture absorption vacuum dehydration and forced vacuum dehydration on the wet paper web after infiltration;
(5) and drying, cutting and coiling the dehydrated wet paper web at 170 ℃ to obtain the AGM diaphragm for the wound battery.
Test example
Relevant items of the AGM diaphragm for the winding battery prepared in the embodiment 1-3 are detected, and the detection method refers to the national standard GB/T28535-2012 lead-acid storage battery separator. The specific detection results are shown in the following table 1:
TABLE 1 results of the measurements
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An AGM diaphragm for a winding battery is characterized in that the thickness of the AGM diaphragm is 0.6-1.5 mm, and the AGM diaphragm comprises the following components in parts by weight: 85-95 parts of glass fiber, 3-5 parts of silicon dioxide aerogel and 4-6 parts of molecular sieve.
2. The AGM separator for a wound battery according to claim 1, comprising the following components in parts by weight: 92 parts of glass fiber, 4 parts of silicon dioxide aerogel and 4 parts of molecular sieve.
3. The AGM separator for a wound battery according to claim 1, wherein the glass fiber is a mixture comprising a fine high alkali glass fiber and a coarse high alkali glass fiber, and the weight ratio of the fine high alkali glass fiber to the coarse high alkali glass fiber is 4:6 to 6: 4.
4. The AGM separator for a wound battery according to claim 3, wherein the fine alkali glass fiber has a filament diameter of 0.5 to 0.8 μm and a length of 0.5 to 1.2 mm.
5. The AGM separator for a wound battery according to claim 3, wherein said coarse alkali glass fiber has a filament diameter of 1.2 to 2.0 μm and a length of 0.5 to 1.2 mm.
6. The AGM separator for a wound battery according to claim 1, wherein the molecular sieve has a particle size of 200 to 300 mesh.
7. A method of preparing the AGM separator for a wound battery according to claim 1, comprising the steps of:
(1) putting the glass fiber and water into a fluffer I, and fluffing for 10-12 min; adding a first dispersing agent for dispersing to ensure that the fibers are uniformly dispersed;
(2) the slurry after being dispersed evenly is subjected to gravity dehydration in a forming part to obtain a wet paper web with high water content;
(3) adding the silica aerogel and the ground molecular sieve into a second fluffer, adding water and a dispersant, and uniformly dispersing;
(4) immersing the wet paper web prepared in the step (2) into the uniformly dispersed silica aerogel and molecular sieve suspension liquid in the step (3) for infiltration treatment; performing gravity dehydration, moisture absorption vacuum dehydration and forced vacuum dehydration on the wet paper web after infiltration;
(5) and drying, cutting and reeling the dehydrated wet paper web to obtain the AGM diaphragm for the wound battery.
8. The method of claim 7, wherein the first dispersant and the second dispersant are each 75% to 98% sulfuric acid; the mass ratio of the addition amount of the first dispersing agent to the glass fiber is 1: 20-40.
9. The method according to claim 7, wherein the drying temperature in the step (5) is 140 ℃ to 170 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111474031.7A CN114142158B (en) | 2021-12-02 | 2021-12-02 | AGM (advanced glass fiber) diaphragm for winding battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111474031.7A CN114142158B (en) | 2021-12-02 | 2021-12-02 | AGM (advanced glass fiber) diaphragm for winding battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114142158A true CN114142158A (en) | 2022-03-04 |
| CN114142158B CN114142158B (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111474031.7A Active CN114142158B (en) | 2021-12-02 | 2021-12-02 | AGM (advanced glass fiber) diaphragm for winding battery and preparation method thereof |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117698182A (en) * | 2024-02-05 | 2024-03-15 | 张家港市天磊玻纤有限公司 | Control system for AGM partition plate machining process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020061439A1 (en) * | 1998-03-11 | 2002-05-23 | Hiroshi Nemoto | Lithium secondary battery |
| US20180269451A1 (en) * | 2017-03-18 | 2018-09-20 | Daramic, Llc | Composite layers or separators for lead acid batteries |
| CN109244317A (en) * | 2018-09-03 | 2019-01-18 | 中材科技膜材料（山东）有限公司 | A kind of winding battery AGM diaphragm and preparation method thereof |
| CN111048723A (en) * | 2019-12-16 | 2020-04-21 | 浙江绿源电动车有限公司 | Modified AGM diaphragm for lead-carbon battery and preparation method thereof |
| CN113451664A (en) * | 2020-03-24 | 2021-09-28 | 东营市海科新源化工有限责任公司 | Thermally-excited active safety mechanism flame-retardant microcapsule, preparation method thereof and lithium ion battery |
-
2021
- 2021-12-02 CN CN202111474031.7A patent/CN114142158B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020061439A1 (en) * | 1998-03-11 | 2002-05-23 | Hiroshi Nemoto | Lithium secondary battery |
| US20180269451A1 (en) * | 2017-03-18 | 2018-09-20 | Daramic, Llc | Composite layers or separators for lead acid batteries |
| CN110651382A (en) * | 2017-03-18 | 2020-01-03 | 达拉米克有限责任公司 | Improved composite layer or separator for lead acid batteries |
| CN109244317A (en) * | 2018-09-03 | 2019-01-18 | 中材科技膜材料（山东）有限公司 | A kind of winding battery AGM diaphragm and preparation method thereof |
| CN111048723A (en) * | 2019-12-16 | 2020-04-21 | 浙江绿源电动车有限公司 | Modified AGM diaphragm for lead-carbon battery and preparation method thereof |
| CN113451664A (en) * | 2020-03-24 | 2021-09-28 | 东营市海科新源化工有限责任公司 | Thermally-excited active safety mechanism flame-retardant microcapsule, preparation method thereof and lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117698182A (en) * | 2024-02-05 | 2024-03-15 | 张家港市天磊玻纤有限公司 | Control system for AGM partition plate machining process |
| CN117698182B (en) * | 2024-02-05 | 2024-04-26 | 张家港市天磊玻纤有限公司 | Control system for AGM partition plate machining process |
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| CN114142158B (en) | 2024-04-19 |
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