CN111799423A - High-performance partition plate for prolonging service life of battery - Google Patents
High-performance partition plate for prolonging service life of battery Download PDFInfo
- Publication number
- CN111799423A CN111799423A CN202010667534.5A CN202010667534A CN111799423A CN 111799423 A CN111799423 A CN 111799423A CN 202010667534 A CN202010667534 A CN 202010667534A CN 111799423 A CN111799423 A CN 111799423A
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- Prior art keywords
- separator
- battery
- glass fiber
- service life
- fiber
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
- H01M10/121—Valve regulated lead acid batteries [VRLA]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a high-performance partition plate for prolonging the service life of a battery, and relates to the technical field of storage battery production. The high-performance partition plate comprises the following materials in percentage by mass: 40-50% of fine glass fiber with a beating degree of 34-39 DEG SR, 35-45% of coarse glass fiber with a beating degree of 25-30 DEG SR, 7-10% of polypropylene fiber and 3-6% of silica gel. According to the invention, the polypropylene fiber and the silica gel are added in the manufacturing process of the AGM superfine fiber separator to modify the separator, so that the separator has partial hydrophobic channels while maintaining high water absorption, thereby ensuring smooth gas compounding and reducing water loss, and prolonging the service life of a maintenance-free battery; and meanwhile, the wet resilience of the separator is improved, and the sufficient pressure in the battery is ensured to reduce the softening of the anode, so that the service life of the battery is prolonged.
Description
Technical Field
The invention belongs to the technical field of storage battery production, and particularly relates to a high-performance partition plate for prolonging the service life of a battery.
Background
The separator is an important component in the storage battery, and is arranged between a positive plate and a negative plate of the storage battery, and the quality of the separator directly influences the discharge capacity and the charge-discharge cycle service life of the storage battery. The separator has the following functions in the storage battery, and firstly, the separator prevents the anode and the cathode from contacting with each other to generate the internal short circuit of the battery; secondly, the pole plate has certain strength to prevent the pole plate from deforming and bending and prevent the active substances from falling off; and thirdly, the required amount of electrolyte is stored in the separator to ensure higher conductivity and the requirement of battery reaction. In addition, the separator material is required to be stable, containing only a small amount of harmful ions or no harmful ions. According to the above requirements, the high-quality separator has the following characteristics: 1. the separator material is an insulator, but the made separator has a loose and porous structure; 2. the separator has good chemical stability, and is resistant to sulfuric acid corrosion, oxidation and aging; 3. the clapboard has higher mechanical strength and toughness, and is convenient to produce and install; 4. the separator cannot leach impurities harmful to the battery in sulfuric acid; 5. the separator has a low resistance in the electrolyte; 6. the separator has a wide temperature range.
Chinese CN201510634497.7 discloses a PE separator for a lead-acid storage battery and a preparation method thereof, wherein the PE separator is prepared from 50-80 parts of glass fiber master batch, 300 parts of silica 260-; wherein the glass fiber master batch is prepared from 0.9-9.1 parts of glass fiber cotton, 5.9-7.1 parts of ultra-high molecular weight polyethylene, 34-42 parts of silicon dioxide, 0.6-1.5 parts of carbon black and 43-55 parts of raw oil, and has the problem of overhigh resistance.
The current widely applied storage battery separators comprise a microporous rubber separator, a sintered polyvinyl chloride (PVC) separator, a melt-blown polypropylene (PP) separator, a microporous Polyethylene (PE) separator, a glass fiber separator and the like; the separators have large resistance and small porosity; therefore, how to obtain a low resistance, increase the porosity and enhance the starting performance of the separator is a problem to be solved.
Disclosure of Invention
The invention aims to provide a high-performance separator for prolonging the service life of a battery, which is characterized in that polypropylene fibers and silica gel are added in the manufacturing process of an AGM superfine fiber separator to modify the separator, so that the separator has partial hydrophobic channels while keeping high water absorption, thereby ensuring smooth gas composition, reducing water loss and prolonging the service life of a maintenance-free battery; and meanwhile, the wet resilience of the separator is improved, and the sufficient pressure in the battery is ensured to reduce the softening of the anode, so that the service life of the battery is prolonged.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a high-performance partition plate for prolonging the service life of a battery, which is composed of the following materials in percentage by mass: 40-50% of fine glass fiber, 35-45% of coarse glass fiber, 7-10% of polypropylene fiber and 3-6% of silica gel.
Further, the degree of beating of the fine glass fibers is from 34 ° SR to 39 ° SR.
Further, the degree of beating of the crude glass fiber is from 25 ° SR to 30 ° SR.
Further, the material comprises the following materials in percentage by mass: 46% of fine glass fiber with a beating degree of 37 DEG SR, 40% of coarse glass fiber with a beating degree of 29 DEG SR, 9% of polypropylene fiber and 5% of silica gel.
Further, the material comprises the following materials in percentage by mass: 42% of fine glass fiber with a beating degree of 34 DEG SR, 45% of coarse glass fiber with a beating degree of 25 DEG SR, 9% of polypropylene fiber and 4% of silica gel.
The invention has the following beneficial effects:
according to the invention, the polypropylene fiber and the silica gel are added in the manufacturing process of the AGM superfine fiber separator to modify the separator, so that the separator has partial hydrophobic channels while maintaining high water absorption, thereby ensuring smooth gas compounding and reducing water loss, and prolonging the service life of a maintenance-free battery; and meanwhile, the wet resilience of the separator is improved, and the sufficient pressure in the battery is ensured to reduce the softening of the anode, so that the service life of the battery is prolonged.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Detailed Description
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
A high-performance separator for prolonging the service life of a battery is composed of the following materials in percentage by mass: 46% of fine glass fiber with a beating degree of 37 DEG SR, 40% of coarse glass fiber with a beating degree of 29 DEG SR, 9% of polypropylene fiber and 5% of silica gel.
Example 2
A high-performance separator for prolonging the service life of a battery is composed of the following materials in percentage by mass: 42% of fine glass fiber with a beating degree of 34 DEG SR, 45% of coarse glass fiber with a beating degree of 25 DEG SR, 9% of polypropylene fiber and 4% of silica gel.
Example 3
A high-performance separator for prolonging the service life of a battery is composed of the following materials in percentage by mass: 40% of fine glass fiber with a beating degree of 39 DEG SR, 45% of coarse glass fiber with a beating degree of 28 DEG SR, 10% of polypropylene fiber and 5% of silica gel.
Example 4
A high-performance separator for prolonging the service life of a battery is composed of the following materials in percentage by mass: 50% of fine glass fiber with a beating degree of 34 DEG SR, 35% of coarse glass fiber with a beating degree of 30 DEG SR, 9% of polypropylene fiber and 6% of silica gel.
In the invention, the polypropylene fiber has good insulating property, high rigidity, good tensile strength and good hydrolytic stability, has strong corrosion resistance and oxidation resistance to chemical substances such as acid, alkali and the like, but has extremely low moisture absorption rate due to the fact that the polypropylene fiber is of a hydrocarbon structure and lacks polar groups.
The polypropylene fiber belongs to a carbon chain polymer, CH has small polarity, is difficult to be wetted by water molecules, can reduce the surface tension of water by means of a surfactant, and has certain wetting performance so as to ensure circuit conduction.
The glass fiber (AGM) separator prepared by adding the fine glass fiber and the coarse glass fiber into the separator material and utilizing the reasonable proportion of the fine glass fiber and the coarse glass fiber has better corrosion resistance, acid resistance and sulfuric acid wettability, and the AGM separator mainly plays a role in a valve-regulated lead acid (VRLA) battery: a certain assembling pressure in the battery is ensured, the over-store expansion and falling of active substances of the positive electrode in the deep discharge cycle process are inhibited, and the cycle life is prolonged; providing a channel for oxygen circulation and ion migration in the battery; storing and providing electrolyte required by battery reaction; preventing short circuits. Meanwhile, the porosity of the partition board is increased while the sufficient structural strength such as compression resistance and tensile strength is ensured by matching the coarse glass fiber and the fine glass fiber.
Meanwhile, the polypropylene fiber is added into a main body system consisting of the fine glass fiber and the coarse glass fiber, so that the defects that a glass fiber (AGM) separator prepared from the fine glass fiber and the coarse glass fiber is poor in rebound resilience, low in wet strength, easy to layer electrolyte and the like are overcome.
Meanwhile, the thermal shrinkage rate of the polypropylene fiber at 140 ℃ is below 8 percent, and even if the polypropylene fiber is heated in the manufacturing process of the separator, the size change of the separator is small, so that the separator with excellent uniform fiber dispersion and more excellent performance can be obtained.
In addition, the cross-sectional shape of the polypropylene fiber is preferably non-circular. The above properties are better when the cross-sectional shape of the fiber is non-circular. The reason for this may be that even if the burrs and edges of the plate were to abut against the high young's modulus polypropylene fibers, the net staggering of the fiber joints is suppressed because the high young's modulus polypropylene fibers are difficult to slip, thereby dispersing and blocking the forces from the burrs and edges. Further, if the cross-sectional shape of the high young's modulus polypropylene fiber is non-circular, the fiber sheet can be made to have a dense structure, and the thickness of the separator can be made thinner.
The polypropylene-based fiber is preferably fibrillated. If fibrosis is observed, the above properties are better. The reason for this is probably because the burrs and edges of the polar plate are thinned when butted with the high Young's modulus polypropylene fibers, so that the force from the burrs and edges can be prevented, and the shearing force caused by the burrs and edges is difficult to act
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A high performance separator plate for improving battery life, characterized in that: the material consists of the following materials in percentage by mass: 40-50% of fine glass fiber, 35-45% of coarse glass fiber, 7-10% of polypropylene fiber and 3-6% of silica gel.
2. The high-performance separator for improving battery life according to claim 1, wherein the degree of beating of the fine glass fibers is 34 ° SR to 39 ° SR.
3. The high-performance separator for improving battery life according to claim 1, wherein the degree of beating of the coarse glass fibers is 25 ° SR to 30 ° SR.
4. The high-performance separator for prolonging the service life of the battery as claimed in any one of claims 1 to 3, which is characterized by comprising the following materials in percentage by mass: 46% of fine glass fiber with a beating degree of 37 DEG SR, 40% of coarse glass fiber with a beating degree of 29 DEG SR, 9% of polypropylene fiber and 5% of silica gel.
5. The high-performance separator for prolonging the service life of the battery as claimed in any one of claims 1 to 3, which is characterized by comprising the following materials in percentage by mass: 42% of fine glass fiber with a beating degree of 34 DEG SR, 45% of coarse glass fiber with a beating degree of 25 DEG SR, 9% of polypropylene fiber and 4% of silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010667534.5A CN111799423A (en) | 2020-07-13 | 2020-07-13 | High-performance partition plate for prolonging service life of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010667534.5A CN111799423A (en) | 2020-07-13 | 2020-07-13 | High-performance partition plate for prolonging service life of battery |
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| CN111799423A true CN111799423A (en) | 2020-10-20 |
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| CN202010667534.5A Pending CN111799423A (en) | 2020-07-13 | 2020-07-13 | High-performance partition plate for prolonging service life of battery |
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2020
- 2020-07-13 CN CN202010667534.5A patent/CN111799423A/en active Pending
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Application publication date: 20201020 |