CN114142158B - AGM (advanced glass fiber) diaphragm for winding battery and preparation method thereof - Google Patents
AGM (advanced glass fiber) diaphragm for winding battery and preparation method thereof Download PDFInfo
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- CN114142158B CN114142158B CN202111474031.7A CN202111474031A CN114142158B CN 114142158 B CN114142158 B CN 114142158B CN 202111474031 A CN202111474031 A CN 202111474031A CN 114142158 B CN114142158 B CN 114142158B
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- molecular sieve
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 238000004804 winding Methods 0.000 title abstract description 5
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004965 Silica aerogel Substances 0.000 claims abstract description 17
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 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 12
- 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
- 238000001035 drying Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 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
- 239000011148 porous material Substances 0.000 abstract description 9
- 239000004964 aerogel Substances 0.000 abstract description 6
- 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
- 239000000463 material Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression 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
- 238000004064 recycling Methods 0.000 description 1
- 238000011895 specific detection 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 (advanced glass fiber) diaphragm for a winding battery and a preparation method thereof, belonging to the technical field of battery diaphragms. The thickness of the material is 0.6-1.5 mm, and the material comprises the following components in parts by weight: 85-95 parts of glass fiber, 3-5 parts of silica aerogel and 4-6 parts of molecular sieve. The AGM separator for wound battery of the present invention uses needle-like glass fibers, and the needle-like objects are cross-lapped during molding, and the wet paper web formed after lapping contains a large number of pores. And the fine silica aerogel and the ground molecular sieve are mixed into the pores in a dipping mode, so that the pores of the original diaphragm are effectively filled, the pore size is reduced, the 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 acidity absorption of the diaphragm is increased, the acidity absorption performance is good, the internal resistance of the battery is small, and enough electrolyte can be absorbed to ensure the high-capacity discharge of the battery.
Description
Technical Field
The invention relates to the technical field of battery diaphragms, in particular to an AGM diaphragm for a winding battery and a preparation method thereof.
Background
In recent years, development of new energy and application is promoted under the pressure of energy and environmental protection. Under the promotion of renewable energy sources such as solar energy, wind energy and the like, and emerging markets such as smart grids, electric automobiles and the like, a battery technology of one of main components of the intelligent power grid needs to have new breakthrough progress. The lead-acid battery has the advantages of mature technology, low price, rich resources, recycling and the like, and is inevitably developed greatly.
In recent years, lead-acid battery technology is continuously developed, a wound battery is a product which is developed faster in recent years, and is different from a common lead-acid battery flat plate lamination structure, positive and negative plates are made into a soft belt shape, glass fiber separators are clamped between the middle and two sides of the positive and negative plates, then the positive and negative plates are pressed and rolled up to be filled into a circular battery slot piece, and a post is welded, covered and sealed to form the valve-controlled battery with a spiral structure.
According to the structural characteristics of the wound lead-acid battery, the electrode plates of the battery are required to be made very thin, which determines that the separator used by the battery is quite different from that of a common ultrafine glass fiber (AGM) battery: the membrane made of the fine glass fiber has small pore diameter and is obviously better than the membrane made of the coarse fiber in terms of puncture resistance; with the thickening of the diameter of glass fiber yarns forming the diaphragm, the liquid absorption amount of the diaphragm is increased, and the faster the acid liquid diffusion speed is, the better the acid liquid layering resistance is; the larger the diameter of the glass fiber yarn is, the better the rebound performance of the diaphragm after absorbing liquid is, and the better the compression resistance is, so the diaphragm adopted by the coiled lead-acid storage battery is a composite diaphragm, and the existing AGM diaphragm can not meet the requirements yet.
Disclosure of Invention
Aiming at the problem that the AGM diaphragm in the prior art cannot meet the requirements of a coiled lead-acid storage battery, the invention provides the AGM diaphragm for the coiled battery and a preparation method thereof, and aims to solve the technical problems.
The technical scheme of the invention is as follows:
an AGM separator for a winding battery, the thickness of which is 0.6-1.5 mm, comprises the following components in parts by weight: 85-95 parts of glass fiber, 3-5 parts of silica 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 silica 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 monofilament diameter of the fine high alkali glass fiber is 0.5-0.8 mu m, and the length is 0.5-1.2 mm.
Preferably, the diameter of the monofilament of the crude high alkali glass fiber is 1.2-2.0 mu m, and the length is 0.5-1.2 mm.
Preferably, the molecular sieve has a particle size of 200-300 mesh.
Another object of the present invention is to provide a method for preparing an AGM separator comprising the steps of:
(1) Putting the mixed glass fiber and water into a fluffer I to be fluffed for 10-12 min; dispersing agent I is added to disperse the fibers uniformly;
(2) Carrying out gravity dewatering on the uniformly dispersed slurry 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 fluffer II, adding water and a dispersing agent, and uniformly dispersing;
(4) Immersing the wet paper web prepared in the step (2) into the suspension of the silica aerogel and the molecular sieve uniformly dispersed in the step (3), and carrying out infiltration treatment; carrying out gravity dewatering, moisture absorption vacuum dewatering and forced vacuum dewatering on the wet paper web after infiltration;
(5) And drying, slitting and coiling the dehydrated wet paper web to obtain the AGM separator for the coiled battery.
Preferably, the first dispersing agent and the second dispersing agent are sulfuric acid with 75-98 percent; the mass ratio of the added amount of the dispersing agent I to the glass fiber is 1:20-40.
Preferably, the drying temperature in the step (5) is 140-170 ℃.
The beneficial effects of the invention are as follows:
The AGM separator for wound battery of the present invention uses needle-like glass fibers, and the needle-like objects are cross-lapped during molding, and the wet paper web formed after lapping contains a large number of pores. And the fine silica aerogel and the ground molecular sieve are mixed into the pores in a dipping mode, so that the pores of the original diaphragm are effectively filled, the pore size is reduced, the 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 acidity absorption of the diaphragm is increased, the acidity absorption performance is good, the internal resistance of the battery is small, and enough electrolyte can be absorbed to ensure the high-capacity discharge of the battery. The added aerogel and molecular sieve in the diaphragm can also effectively improve the rebound resilience of the diaphragm, and is not easy to damage in the process of installation and replacement.
Detailed Description
In order to better understand the technical solutions of the present invention, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the 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 silica aerogel and 6 parts of molecular sieve.
(1) Putting the mixed glass fiber and water into a fluffer I, and fluffing for 10min; adding 4 parts of 85% sulfuric acid for dispersing, so that the fibers are uniformly dispersed;
(2) Carrying out gravity dewatering on the uniformly dispersed slurry in a forming part to obtain a wet paper web with high water content;
(3) Adding the silicon dioxide aerogel and the ground molecular sieve into a fluffer II, adding water and 0.5 part of 85% sulfuric acid, and uniformly dispersing;
(4) Immersing the wet paper web prepared in the step (2) into the suspension of the silica aerogel and the molecular sieve uniformly dispersed in the step (3), and carrying out infiltration treatment; carrying out gravity dewatering, moisture absorption vacuum dewatering and forced vacuum dewatering on the wet paper web after infiltration;
(5) Drying, slitting and coiling the dehydrated wet paper web at 140 ℃ to obtain the AGM separator for the coiled battery.
Example 2
An AGM separator for a wound battery, which has a thickness of 1.2mm and comprises the following components in parts by weight: 92 parts of glass fiber, 4 parts of silica aerogel and 4 parts of molecular sieve.
(1) Putting the mixed glass fiber and water into a fluffer I, and fluffing for 10min; adding 4 parts of 85% sulfuric acid for dispersing, so that the fibers are uniformly dispersed;
(2) Carrying out gravity dewatering on the uniformly dispersed slurry in a forming part to obtain a wet paper web with high water content;
(3) Adding the silicon dioxide aerogel and the ground molecular sieve into a fluffer II, adding water and 0.5 part of 85% sulfuric acid, and uniformly dispersing;
(4) Immersing the wet paper web prepared in the step (2) into the suspension of the silica aerogel and the molecular sieve uniformly dispersed in the step (3), and carrying out infiltration treatment; carrying out gravity dewatering, moisture absorption vacuum dewatering and forced vacuum dewatering on the wet paper web after infiltration;
(5) Drying, slitting and coiling the dehydrated wet paper web at 160 ℃ to obtain the AGM separator for the coiled battery.
Example 3
An AGM separator for a wound battery, which has a thickness of 1.5mm and comprises the following components in parts by weight: 95 parts of glass fiber, 5 parts of silica aerogel and 5 parts of molecular sieve.
(1) Putting the mixed glass fiber and water into a fluffer I, and fluffing for 12min; adding 4 parts of 85% sulfuric acid for dispersing, so that the fibers are uniformly dispersed;
(2) Carrying out gravity dewatering on the uniformly dispersed slurry in a forming part to obtain a wet paper web with high water content;
(3) Adding the silicon dioxide aerogel and the ground molecular sieve into a fluffer II, adding water and 0.5 part of 85% sulfuric acid, and uniformly dispersing;
(4) Immersing the wet paper web prepared in the step (2) into the suspension of the silica aerogel and the molecular sieve uniformly dispersed in the step (3), and carrying out infiltration treatment; carrying out gravity dewatering, moisture absorption vacuum dewatering and forced vacuum dewatering on the wet paper web after infiltration;
(5) Drying, slitting and coiling the dehydrated wet paper web at 170 ℃ to obtain the AGM separator for the coiled battery.
Test case
The AGM separator for wound batteries prepared in examples 1 to 3 was subjected to the detection of the relevant items, and the detection method was carried out with reference to the national standard "GB/T28535-2012 separator for lead-acid batteries". The specific detection results are shown in the following table 1:
TABLE 1 detection results
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The AGM separator for the wound battery is characterized by having a thickness of 0.6-1.5 mm and comprising the following components in parts by weight: 85-95 parts of glass fiber, 3-5 parts of silica aerogel and 4-6 parts of molecular sieve; the preparation method comprises the following steps:
(1) Putting the glass fiber and water into a fluffer I to be fluffed for 10-12 min; dispersing agent I is added to disperse the fibers uniformly;
(2) Carrying out gravity dewatering on the uniformly dispersed slurry 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 fluffer II, adding water and a dispersing agent, and uniformly dispersing;
(4) Immersing the wet paper web prepared in the step (2) into the suspension of the silica aerogel and the molecular sieve uniformly dispersed in the step (3), and carrying out infiltration treatment; carrying out gravity dewatering, moisture absorption vacuum dewatering and forced vacuum dewatering on the wet paper web after infiltration;
(5) Drying, slitting and coiling the dehydrated wet paper web to obtain an AGM diaphragm for the coiled battery;
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; the diameter of the monofilament of the fine high alkali glass fiber is 0.5-0.8 mu m, and the length of the monofilament is 0.5-1.2 mm; the diameter of the monofilament of the crude high-alkali glass fiber is 1.2-2.0 mu m, and the length of the monofilament is 0.5-1.2 mm.
2. An 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 silica aerogel and 4 parts of molecular sieve.
3. The AGM separator for a wound battery according to claim 1, wherein the molecular sieve has a particle size of 200 to 300 mesh.
4. The AGM separator for a wound battery according to claim 1, wherein the dispersant one and the dispersant two are each 75% to 98% sulfuric acid; the mass ratio of the added amount of the dispersing agent I to the glass fiber is 1:20-40.
5. The AGM separator for a wound battery according to claim 1, 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 CN114142158A (en) | 2022-03-04 |
| CN114142158B true CN114142158B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111474031.7A Active CN114142158B (en) | 2021-12-02 | 2021-12-02 | AGM (advanced glass fiber) diaphragm for winding battery and preparation method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11260416A (en) * | 1998-03-11 | 1999-09-24 | Ngk Insulators Ltd | Lithium secondary battery |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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