CN108539111A - A kind of accumulator composite diaphragm and preparation method thereof - Google Patents
A kind of accumulator composite diaphragm and preparation method thereof Download PDFInfo
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- CN108539111A CN108539111A CN201810292252.4A CN201810292252A CN108539111A CN 108539111 A CN108539111 A CN 108539111A CN 201810292252 A CN201810292252 A CN 201810292252A CN 108539111 A CN108539111 A CN 108539111A
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- Prior art keywords
- partition
- specific surface
- composite diaphragm
- surface area
- partition board
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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
- 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
-
- 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
- H01M50/431—Inorganic material
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a kind of accumulator composite diaphragm and preparation method thereof, which is made of upper and lower two layers of partition board, and the specific surface area of upper partition is 0.4 1.0m2/ g, it includes the glass fibre of 29oSR 17oSR, the specific surface area of lower partition is 1.0m2/ g or more, it includes the glass fibres of 44oSR 29oSR；By weight percentage, upper partition is 55 65%, and lower partition is 35 45%.The present invention passes through the carrier ring of different specific surface areas is compound, make full use of the advantage of different specific surface area partition boards, following floor height specific surface area partition board controls leading indicator, to meet the use demand of lead-acid accumulator, upper layer low specific surface area partition board, which can not only play, prevents the active material of positive/negative plate to be in direct contact, cause the effect of battery short circuit, moreover it is possible to increase partition board elasticity, ensure battery capacity；And production cost can be reduced.
Description
Technical field
The invention belongs to storage battery production technical fields, and in particular to a kind of accumulator composite diaphragm and preparation method thereof.
Background technology
Partition board is the significant components in lead-acid accumulator, it is the component for preventing the direct short circuit of battery plus-negative plate plate, different
Partition board is different used in the lead-acid battery of type.Currently, for as barren liquor type power type valve control sealed battery, generally
Using superfine glass fibre partition board（AGM）, main component is glass fibre.Due to glass fibre be by flame method with
What machine extracted, the fineness and length of fiber are irregular, and glass fibre most can carefully accomplish 0.8 μm -1.59 μm at present,
Cause the maximum diameter of hole of the glass fibre separator prepared larger, pore-size distribution is uneven, and compression resilience is poor.This every
Plate keeps system, its adsorbable a large amount of electrolyte as the electrolyte of battery, and has both the effect of partition board, can prevent positive and negative
Short-circuit between plates.The underlying attribute of AGM partition boards is：It is big and fast to adsorb electrolyte content；Aperture is small, the sour absorbency of suction is good, protects liquid
Property is good；Acidproof, resistance to oxidation, internal resistance are small；Compound channel is provided for the diffusion of oxygen；With heat-resistant stability；Has certain machinery
Tensile strength.
But the cost of AGM partition boards is higher, can the market price be slump all the way in recent years, this not only constrain partition board enterprise
Industry develops, or even has seriously threatened the existence of enterprise, and to improve the market competitiveness of enterprise, it is urgent to provide a kind of accumulators
Partition board can reduce its production cost on the basis of ensureing partition board performance, meeting application requirement.
Invention content
For deficiencies of the prior art, the object of the present invention is to provide a kind of accumulator composite diaphragm and its systems
Preparation Method.It is compound by carrying out the partition board of high-specific surface area and low specific surface area, double-layer clapboard structure is obtained, height is made full use of
The respective advantage of low specific surface area especially shows more superior performance on aperture and wet elasticity two indices, drops simultaneously
Low production cost.
The first aspect of the present invention provides a kind of accumulator composite diaphragm, and the accumulator composite diaphragm is by upper and lower two layers
Partition board forms, and the specific surface area of upper partition is 0.4-1.0m2/ g, it includes the glass fibre of 29oSR-17oSR, lower partitions
Specific surface area be 1.0m2/ g or more, it includes the glass fibres of 44oSR-29oSR；By weight percentage, upper partition is
55-65%, lower partition 35-45%.
According to the present invention, the carrier ring of different specific surface areas reaches thick using the material of different fibre diameters in order to obtain
Thin collocation, improves partition board leading indicator performance.
The composite diaphragm of the present invention can add other fibrous materials according to different purposes and requirement, such as natural fiber, organic
Fiber, inorfil etc. can increase the intensity and folding resistance of web by fiber of the addition with adhering characteristic.Preferably,
Upper partition and lower partition also include organic fiber and/or inorfil, wherein the weight percent of glass fibre is 95-
99%, the weight percent of organic fiber and/or inorfil is 1-5%.
Under preferable case, the organic fiber in polyethylene fibre, polypropylene fibre and polyester fiber at least one
Kind；The inorfil is phosphate fiber.
Preferably, the specific surface area of the upper partition is 0.45-0.60m2/ g, by the glass of 29oSR and/or 17oSR
Glass fiber is made；The specific surface area of the lower partition is 1.20-1.45m2/ g, by the glass fibre system of 44oSR and 29oSR
At.
It is highly preferred that the specific surface area of the upper partition is 0.52-0.53m2/ g, the specific surface area of the lower partition
For 1.36-1.40m2/g。
In the present invention, the glass fibre is preferably high alkali glass fibre.It can be effectively increased using high alkali glass fibre
The acid resistance of composite diaphragm.
In the present invention, the length of glass fibre can be 2-7mm, be arranged in pairs or groups by length, the thickness ratio of binding fiber diameter,
The performance of partition board is set to reach optimum state.
The second aspect of the present invention provides a kind of preparation method of above-mentioned accumulator composite diaphragm, the preparation method packet
It includes：
1）The fibrous material for preparing upper partition and lower partition is dispersed in water and is beaten, slurries are made；
2）By net forming on slurries, shapes and wet partition board is made；
3）The wet partition board of the wet partition board in upper layer and lower layer is overlapped together, it is compound by negative pressure of vacuum draft, then be dried, it is made
Accumulator composite diaphragm.
In order to increase fiber decentralization, under preferable case, the glass fibre of different beating degrees is beaten respectively, when mashing
Between be 10-40min, the dispersion liquid after mashing mixed again, and the molding slurries of online are made.Using pulper by glass fibre
It is beaten, current pulper is using supplemented by cut staple, strengthening based on dispersion, and control dispersion concentration is 1% hereinafter, making fibre
Dimension structure reaches ideal " thick, thin, long and short " collocation state, increases the folding resistance and pull resistance of partition board.
Preferably, dry temperature is 120-200 DEG C, drying time 0.5-3h.The present invention is carried out using three layers of drying tunnel
It is dry, increase run time of the partition board in drying tunnel, uses based on hot air convective drying, supplemented by radiant drying；Drying process
Using the new process of high wind low-temperature circulating gradually pushing-type, new drying process can make the fingers such as the dry and wet intensity, toughness of product, acid resistance
Mark further increases.
In addition, generally use beating degree（Beating degree）The average diameter of fiber is reacted, because fibre diameter is small, specific surface
The big then drainage rate of product is slow, and the beating degree measured on Schooper-Riegler beating degree tester is just high.The expression symbol of beating degree is oSR, different beatings
The fiber product of degree corresponds to different fibre diameters.
Compared with prior art, the present invention has following beneficial to point：
The present invention utilizes the performance of different specific surface area partition boards, following floor height by the way that the carrier ring of different specific surface areas is compound
Specific surface area partition board controls leading indicator, and to meet the use demand of lead-acid accumulator, upper layer low specific surface area partition board can not only
Play the role of preventing the active material of positive/negative plate to be in direct contact, cause battery short circuit, moreover it is possible to increase partition board elasticity, ensure electricity
Tankage.The structure of double-layer clapboard paper takes full advantage of the respective advantage of glass fibre size specific surface area, especially in aperture
With more superior performance is shown on wet elasticity two indices.In addition to this, also can be predicted high-ratio surface lamination prevent it is short
Road is upper more effective with acid layering.Especially composite diaphragm of the invention also has advantage at low cost.The present invention is existing in guarantee
Under the premise of product index does not decline integrally, and emphasis index is slightly promoted, the double-layer clapboard of super quality and competitive price is developed.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with the embodiment of the present invention, it is clear that retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.
In the following Examples and Comparative Examples, the measurement of each parameter is carried out according to the bioassay standard of the industry.
Embodiment 1-6 is used to illustrate the accumulator composite diaphragm and preparation method thereof of the present invention.
Embodiment 1-6
Accumulator composite diaphragm is prepared respectively according to the formula in table 1, and preparation method includes：
1）The glass fiber material for preparing upper partition and lower partition is dispersed in water and is beaten, slurries are made, it is different
The glass fibre of beating degree is beaten respectively, beating time 10-40min, mixes slurries according to formula；
2）By net forming on mixed slurries, shapes and wet partition board is made；
3）The wet partition board of the wet partition board in upper layer and lower layer is overlapped together, it is compound by negative pressure of vacuum draft, then be dried, it is dry
Temperature is 135-190 DEG C, drying time 0.5-3h, and accumulator composite diaphragm is made.
Recombination process is specially：The wet partition board of lower layer is taken out in the case where not vacuumizing, is placed on the plastic paper not absorbed water
On, then the wet partition board hair side in upper layer is attached to downward on the wet partition board of lower layer before not vacuumizing, on pad plastic paper with weight back and forth
It presses, then carries out vacuum and drain, complete compound.
It is 2#-7# that accumulator composite diaphragm obtained is marked as sample number respectively, and lower partition is sample number -1, upper partition
For sample number -2.
Comparative example 1
With the specific surface area that 5# production lines are existing（BET）：For 1.0 formula as basic comparative sample, formula is as shown in table 1, system
Preparation Method includes：
1）The glass fiber material for preparing partition board is dispersed in water and is beaten, slurries, the glass fibers of different beating degrees are made
Dimension is beaten respectively, beating time 10-40min；
2）By net forming on slurries, the wet partition board after sizing is dried, and dry temperature is 135-190 DEG C, and drying time is
Battery separator is made in 0.5-3h.
Table 1
The aperture of each battery separator, wet elasticity, elongation and pulling force are measured, specific data are as shown in table 2.
Table 2
As shown in Table 2, compared with basic sample, aperture becomes smaller by 4#, 5#, and pulling force reduces, and wet elasticity is obviously improved；2#、3#、6#、7#
Compared with basic sample, aperture becomes smaller, and tension variations are little, and wet elasticity is obviously improved.
In addition, the partition board of embodiment and comparative example is carried out cost accounting, the relatively mixing of the double-layer clapboard cost of embodiment every
Plate cost is declined, specific as shown in table 3.The cost price of glass fibre presses 13800 yuan/ton of 44oSR, 29oSR 10500
Yuan/ton, 5000 yuan/ton of 17oSR.
Table 3
As can be seen from Table 3, the double-layer clapboard of different formulations is declined compared with the partition board cost of comparative example, is conducive to economic effect
The raising of benefit.
In conclusion the present invention double-layer clapboard structure be make full use of glass fibre size specific surface area it is respective
Advantage especially shows more superior performance on aperture and wet elasticity two indices.In addition to this, it also can be predicted high ratio
Superficial layer is preventing short circuit upper more effective with acid layering.Importantly, the advantage-that can not be ignored there are one it is at low cost,
Emphasis index is good.
The embodiment of the present invention is described above, above description is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.Without departing from the scope and spirit of illustrated embodiment, for the art
Many modifications and changes will be apparent from for those of ordinary skill.
Claims (10)
1. a kind of accumulator composite diaphragm, it is characterised in that：The accumulator composite diaphragm is made of upper and lower two layers of partition board, upper layer
The specific surface area of partition board is 0.4-1.0m2/ g, it includes the glass fibre of 29oSR-17oSR, the specific surface area of lower partition is
1.0m2/ g or more, it includes the glass fibres of 44oSR-29oSR；By weight percentage, upper partition 55-65%, lower layer
Partition board is 35-45%.
2. accumulator composite diaphragm according to claim 1, it is characterised in that：Upper partition and lower partition also include
Machine fiber and/or inorfil, wherein the weight percent of glass fibre is 95-99%, organic fiber and/or inorfil
Weight percent is 1-5%.
3. accumulator composite diaphragm according to claim 2, it is characterised in that：The organic fiber is selected from polyethylene fiber
At least one of dimension, polypropylene fibre and polyester fiber；The inorfil is phosphate fiber.
4. the accumulator composite diaphragm according to any one of claim 1-3, it is characterised in that：The upper partition
Specific surface area is 0.45-0.60m2/ g is made of the glass fibre of 29oSR and/or 17oSR；The ratio table of the lower partition
Area is 1.20-1.45m2/ g is made of the glass fibre of 44oSR and 29oSR.
5. accumulator composite diaphragm according to claim 4, it is characterised in that：The specific surface area of the upper partition is
0.52-0.53m2The specific surface area of/g, the lower partition are 1.36-1.40m2/g。
6. accumulator composite diaphragm according to claim 1, it is characterised in that：The glass fibre is that high alkali glass is fine
Dimension.
7. accumulator composite diaphragm according to claim 1, it is characterised in that：The length of glass fibre is 2-7mm.
8. the preparation method of the accumulator composite diaphragm described in any one of claim 1-7, which is characterized in that the preparation side
Method includes：
1）The fibrous material for preparing upper partition and lower partition is dispersed in water and is beaten, slurries are made；
2）By net forming on slurries, shapes and wet partition board is made；
3）The wet partition board of the wet partition board in upper layer and lower layer is overlapped together, it is compound by negative pressure of vacuum draft, then be dried, it is made
Accumulator composite diaphragm.
9. the preparation method of accumulator composite diaphragm according to claim 8, it is characterised in that：The glass of different beating degrees
Fiber is beaten respectively, beating time 10-40min.
10. the preparation method of accumulator composite diaphragm according to claim 8, it is characterised in that：Dry temperature is
120-200 DEG C, drying time 0.5-3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292252.4A CN108539111B (en) | 2018-03-30 | 2018-03-30 | Composite separator of storage battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292252.4A CN108539111B (en) | 2018-03-30 | 2018-03-30 | Composite separator of storage battery and preparation method thereof |
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| CN108539111B CN108539111B (en) | 2021-05-11 |
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| CN201810292252.4A Active CN108539111B (en) | 2018-03-30 | 2018-03-30 | Composite separator of storage battery and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289384A (en) * | 2019-06-24 | 2019-09-27 | 天能电池(芜湖)有限公司 | A kind of NEW TYPE OF COMPOSITE AGM partition preventing high current short circuit |
| CN111799423A (en) * | 2020-07-13 | 2020-10-20 | 天能电池(芜湖)有限公司 | High-performance partition plate for prolonging service life of battery |
| CN112886107A (en) * | 2020-12-31 | 2021-06-01 | 天津国安盟固利新材料科技股份有限公司 | Optimized button cell assembling method |
| CN113206349A (en) * | 2021-04-29 | 2021-08-03 | 浙江昊杨新能源科技有限公司 | AGM separator with high acid absorption and high resilience and preparation method thereof |
| CN114843699A (en) * | 2022-04-08 | 2022-08-02 | 沁阳市立标滤膜有限公司 | Production process of composite AGM partition plate and composite forming machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289384A (en) * | 2019-06-24 | 2019-09-27 | 天能电池(芜湖)有限公司 | A kind of NEW TYPE OF COMPOSITE AGM partition preventing high current short circuit |
| CN111799423A (en) * | 2020-07-13 | 2020-10-20 | 天能电池(芜湖)有限公司 | High-performance partition plate for prolonging service life of battery |
| CN112886107A (en) * | 2020-12-31 | 2021-06-01 | 天津国安盟固利新材料科技股份有限公司 | Optimized button cell assembling method |
| CN112886107B (en) * | 2020-12-31 | 2022-08-26 | 天津国安盟固利新材料科技股份有限公司 | Optimized button cell assembling method |
| CN113206349A (en) * | 2021-04-29 | 2021-08-03 | 浙江昊杨新能源科技有限公司 | AGM separator with high acid absorption and high resilience and preparation method thereof |
| CN114843699A (en) * | 2022-04-08 | 2022-08-02 | 沁阳市立标滤膜有限公司 | Production process of composite AGM partition plate and composite forming machine |
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