Glass fiber blanket separator for sealed absorbed-electrolyte lead batteries

FIELD: electrical engineering; separators for sealed absorbed-electrolyte lead batteries.

SUBSTANCE: proposed glass fiber blanket separator characterized in optimal porous structure aiding in complete absorption of electrolyte is, essentially, composition of microporous spatula glass fibers of microscopic thinness, fiber mean diameter being 0.35 to 0.40 and 0.22 to 0.25 μm and chemically resistant latex as binder, proportion of components being as follows, mass percent: fiber whose mean diameter is between 0.35 and 0.40 μm, 78 - 80; fiber whose mean diameter is between 0.22 and 0.25 μm, 15 - 17; chemically resistant latex, the rest.

EFFECT: reduced electrical resistance and enhanced mechanical strength ensuring high separating properties.

1 cl, 1 tbl, 4 ex

 

The invention relates to the electrical industry and can be used for the production of separation materials for lead batteries with absorbed electrolyte traditional type, also cylindrical and prismatic.

The LEVEL of TECHNOLOGY

The analysis of patent information sources to create separation materials, absorbent sulfate electrolyte was carried out based on the functions conferred on this type of separator comprising a sealed battery, i.e. the separator should serve not only as an insulator against short circuits, but also a reservoir of electrolyte. In addition, through the separator should easily pass the oxygen generated during the electrochemical reaction and recovering on the negative electrode. When the pores of the separator are substantially filled with electrolyte. Therefore, the absorbent separator must have pores of two types: one for transportation of gas the size of 2-4 microns, the other - for the transport of ions of the electrolyte by the size of 10-25 microns.

Currently, there are many patents on the creation of absorbent separator. Apply fiberglass different diameter with the addition of organic polymer fibers and inorganic fillers. When this tendency to the fact that manufacturers of absorbent separator is to achieve good absorption characteristics of the electrolyte and uniform distribution by varying different types of fibers.

Known separator for sealed lead-acid rechargeable battery according to the international application WO No. 80/01969, CL H 01 M 2/16, 1980

Material made of a composition containing 30-80 wt.% perlite and 20 to 70 wt.% the glass fibers with a diameter of from 03 to 1.0 μm; perlite particles have a size of 3 to 100 μm.

Composition containing 15-75 wt.% perlite, 20 - 70% may.% glass fibers and 5 to 20 wt.% not acid-soluble heat-resistant fibers, has the function of collector electrolyte.

The disadvantage of this material is that it has a porous structure and therefore low holding capacity to the electrolyte.

Known separator for sealed lead battery on the international application WO No. 9800875, CL H 01 M 2/16, 1998

A separator made of a mixture of glass fibers, most of which has a diameter not exceeding 20 μm, and a diameter less than 1 micron to about 5% and 0.2 - 20% of cellulose fibers. Made from the mixture of the separator has a higher strength than those generated from a typical mixture of optical fibers.

The disadvantage of this technical solution is macroporous structure of a known material and, hence, low holding capacity to the electrolyte.

The closest in technical essence and the achieved result is Sep'a is ATOR for sealed lead-acid batteries at the request of Japan No. 61-259452, class H 01 M 2/16, 1980 (adopted for the prototype).

The separator is made by mixing a fiber diameter of 3 μm with micron acid-resistant inorganic substance, for example dioxide aluminum or expanded perlite of 30 - 39% of the total weight of the separator, and is used as a binder gelatin or starch in the amount of 2 - 5% of the total weight of the separator.

The disadvantage of this material is that it is made of coarse fibers, resulting in the obtained separation material with porous structure, which leads to low retention with respect to the electrolyte. In addition, a disadvantage of this known material is the fact that he as a binder contains food components, and this is impractical.

The INVENTION

The purpose of the invention is to create a separator Mat, suitable for use in a sealed lead acid batteries with absorbed electrolyte of any design (traditional flat separator, cylindrical and prismatic), is able to prevent a short circuit, to fully absorb the electrolyte in an amount sufficient for the electrochemical processes in the battery. The separator must be different necessary strength, low resistivity sky is ready pore size and high specific absorption sulfuric acid electrolyte.

This goal is achieved by the fact that as fiberglass taken a composition comprising a microporous super fine grain glass staple fibers with an average diameter of 0.35 - 0.40) μm, mean diameter (0,22 - 0,25) μm and chemically resistant latex as a binder in the following ratio, wt.%:

Fiber with an average diameter of 0.35 - 0.40) mm - 78 - 80

Fiber with an average diameter (0,22 - 0,25) mm 15-17

Chemical resistant latex - the rest is up to 100.

Fibers with an average diameter of 0.35 - 0.40 microns) was carried out in accordance with the technical requirements of THE 6-11-483-79, fibers with an average diameter (0,22 - 0,25 microns) was carried out in accordance with the technical requirements of THE 6-19-062-87 and chemically resistant polymetylmetacrylate latex produced in accordance with TU 6-01-479-79.

The separator Mat is made in paper technology. Super fine grain glass staple fibers mentioned above, the pre-processed in the grinding roll at a concentration of 0.8 - 1.0%. The fibres of each diameter were processed separately, because in the original condition they are different lengths. When grinding the fiber comb, split and grow shorter.

The so-prepared mass is added to any chemically resistant binder, for example on BNR rubber, polymetylmetacrylate latex, on the other.

The prepared pulp is diluted with water to a concentration of 0.2 - 0.3% and is supplied to the low tide. Molded specimens were pressed and dried.

Samples of separator-glass mats were tested by standard methods on the physico-mechanical properties.

Were produced and tested the following sample.

Sample 1.

Made a sample Mat, consisting of a mixture of super fine grain staple fibers with the addition of chemical resistant latex in the ratio, wt.%:

Fiber with an average diameter M20 - MTV - (0,35 - 0,40) μm - 76

Fiber with an average diameter M20 - MTV - (0,22 - 0,25) μm - 20

Chemical resistant latex - 4.

The resulting material has a thickness of 0.7 mm, maximum tensile strength is 0.25 MPa, the electrical resistance of 0.12 Ohm·cm2the maximum pore size of 20 microns, the minimum is 6 μm, the specific absorption sulfuric acid electrolyte - 12.5 g/g, a lack of flexibility and resistance to mechanical damage.

Specific absorption sulfuric acid electrolyte is characterized by the amount of sulfuric acid in grams absorbed separation material for 10 min at full dipped in sulfuric acid, is related to the mass of absolutely dry separator in grams.

The definition of this parameter was performed according to the methods described in THE OP 13-0248643-251-92 "Material separation for acids who's current sources".

Sample 2.

Made a sample Mat, consisting of a mixture of super fine grain staple fibers with the addition of chemical resistant latex in the ratio, wt.%:

Fiber with an average diameter M20 - MTV - (0,35 - 0,40) μm - 78 - 80

Fiber with an average diameter M20 - MTV - (0,22 - 0,25) mm 15 - 17

Chemical resistant latex - the rest is up to 100.

The resulting material has a thickness of 0.7 mm, a tensile strength at elongation at 0.42 MPa, the electrical resistance is 0.06 Ohm·cm2the maximum pore diameter is 10 μm, the minimum is 2 μm, the specific absorption sulfuric acid electrolyte is 18.7 g/g, has the ability to bend without mechanical damage.

Sample 3.

Made a sample Mat, consisting of a mixture of super fine grain staple fibers with the addition of chemical resistant latex in the ratio, wt.%:

Fiber with an average diameter M20 - MTV - (0,35 - 0,40) μm - 78 - 80

Fiber with an average diameter M20 - MTV - (0,22 - 0,25) mm 15 - 17

Chemical resistant latex - the rest is up to 100.

Sample 3 has a thickness of 1.1 mm, the maximum diameter of pores of 10 μm, the minimum is 2 μm, has a low resistivity - 0.07 Ohm·cm2able to bend without mechanical damage, has a tensile strength tensile - 0,45 MPa and specific absorption sulfuric acid electrolyte is 18.7 g/g

Sample 4.

Made of obretetskaya, consisting of a mixture of super fine grain staple fibers with the addition of chemical resistant latex in the ratio, wt.%:

M20 - MTV - (0,35 - 0,40) μm - 83

M20 - MTV - (0,22 - 0,25) mm - 13

Chemical resistant latex - 4

Received a sample of the Mat has a thickness of 0.7 mm, the electric resistance of 0.12 Ohm • cm2the maximum pore size of 30 μm, the minimum is 8 μm, the tensile strength tensile - 0.25 MPa and specific absorption sulfuric acid electrolyte - 11.6 g/year

The results obtained are presented in table 1.

As seen from the above examples (Table 1), the decrease of the content in the composition of the super fine grain staple fiber with a diameter of 0.35 -0,40) µm below 78% (sample 1) leads to a decrease in mechanical strength, elasticity and specific absorption sulfuric acid electrolyte. The structure of the separator-Mat thus obtained porous.

The increase of the content in the composition of glass fiber with diameter of 0.35 - 0.40 microns) above 80% (sample 4) also affects the physico-mechanical and structural characteristics of the separator-Mat.

The change of the quantitative composition of the claimed composition of the second component is a glass fiber with an average diameter (0,22 - 0,25 microns) also leads to deterioration of physical and mechanical properties of the separator-Mat.

Thus, the claimed composition (samples 2 and 3) has a means is the emotional advantage over prototype:

- optimal porous structure conducive to good absorption of the electrolyte, as evidenced by the high specific absorption sulfuric acid electrolyte and a small diameter of the pores.

low resistivity;

sufficient mechanical strength and flexibility, providing high separation properties of glass Mat;

excludes from its composition of food components.

Table 1 - characteristics of the samples of the inventive separator-Mat
no p

Samples
Compositions of samples declared separator Mat wt.%Characteristics of the glass Mat
The thickness under load scoi 10 MPa, mmUltimate tensile strength, MPaElasticity (bend 180° without mechanical damage of establishments)Resistivity, Ohm·cm2Specific absorption sulfuric acid electrolyte

The pore size, microns
maximumaverageminimal
1Fiber with an average diameter of 0.35-0.40) mm - 78 - 80
/br> - And

Fiber with an average diameter (0,22-0,25) mm 15-17

- In

- Chemical resistant latex -

A - 76

B - 20

C - 4
0,70,25no0,1212,5208,56,0
2A - 78-80

B - 15-17

From rest to 100
0,70,42Yes0,0618,7106-81,0-3,0
3A - 78-80

B - 15-17

From rest to 100
1,10,45Yes0,0718,7106-81,0-3,0
4A - 83

B - 13

C - 4
0,70,20no0,12the 11.630108

SOURCES of INFORMATION

1. International application WO No. 80/01969, CL H 01 M 2/16, 1980.

2. International application WO No. 980875, CL H 01 M 2/16, 1998.

3. Japan's bid No. 61-259452, CL H 01 M 2/16, 1980 (prototype).

Separator-Mat for sealed lead batteries containing glass fiber and a binder, characterized in that as fiberglass taken a composition comprising a microporous super fine grain glass staple fiber with an average the diameter of 0.35÷ 0,40) μm, mean diameter (0,22÷0,25) μm and chemically resistant latex as a binder in the following ratio, wt.%:

Fiber with an average diameter of 0.35÷, and 0.40 microns) - 78÷80

Fiber with an average diameter (0,22÷0,25) mm - 15÷17

Chemical resistant latex Else 100



 

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FIELD: electrical engineering; separators for sealed absorbed-electrolyte lead batteries.

SUBSTANCE: proposed glass fiber blanket separator characterized in optimal porous structure aiding in complete absorption of electrolyte is, essentially, composition of microporous spatula glass fibers of microscopic thinness, fiber mean diameter being 0.35 to 0.40 and 0.22 to 0.25 μm and chemically resistant latex as binder, proportion of components being as follows, mass percent: fiber whose mean diameter is between 0.35 and 0.40 μm, 78 - 80; fiber whose mean diameter is between 0.22 and 0.25 μm, 15 - 17; chemically resistant latex, the rest.

EFFECT: reduced electrical resistance and enhanced mechanical strength ensuring high separating properties.

1 cl, 1 tbl, 4 ex

FIELD: electrical engineering; liquid silicate electrolyte and its use for storage batteries.

SUBSTANCE: proposed electrolyte preparation process includes addition of silicic acid sol in the amount of 5 - 15 parts by weight containing silicon dioxide (SiO2) in the amount of 40 - 60 mass percent to water taken in the amount of 15 - 20 parts by weigh while stirring mixture until its concentration, as measured by Baume hydrometer, ranges between 0.65 and 0.85 Baume degrees; addition of inorganic acid to mixture obtained in the process until its pH ranges between 1 and 4; placement of mixture obtained into magnetic field whose flux density ranges between 0.1 and 0.6 T (between 1000 and 6000 G) for 5 to 10 minutes; and stirring of magnetized mixture upon its withdrawal from magnetic field until its dynamic viscosity becomes lower than 0.02 mP-s to obtain low-sodium-content liquid electrolyte. Storage battery using proposed electrolyte is characterized in specific power capacity of 53 W and higher, its service life is increased from 350 to 400 or more charge-discharge cycles; such battery will operate normally at low and high temperatures, its operating temperature range being between -50 and +60 °C.

EFFECT: enhanced capacity and service life, enlarged operating temperature range of battery using proposed electrolyte.

7 cl, 2 dwg, 2 ex

FIELD: electrical engineering; lead battery manufacture.

SUBSTANCE: proposed lead battery has strengthened active material on its positive plate thereby enhancing its utilization efficiency at low internal resistance of battery. Novelty is that only positive plates hold in their voids gel-like sulfuric-acid electrolyte and remaining space of battery is filled with liquid sulfuric acid electrolyte.

EFFECT: enlarged service life of battery.

1 cl, 1 tbl

FIELD: electrical engineering.

SUBSTANCE: first, storage battery pores volume is filled with liquid electrolyte sulphate, then, remaining volume is filled with gel electrolyte sulphate. Note here that storage battery is filled in two steps: during first step, entire volume of storage battery is filled with liquid electrolyte (sulphuric acid solution). After allowance, electrolyte is rained from storage battery except for that existing in threshold volume of electrode unit. During second step, free volume is filled with young colloid solution of sulphuric acid (sulphuric acid solution with addition of stiffener - aerosil with concentration of (5.6÷9%) with subsequent allowance until colloid solution is completely structured and gel is formed in storage battery.

EFFECT: higher efficiency of filling sealed lead storage batter with electrolyte and specific capacity properties.

1 tbl

FIELD: electricity.

SUBSTANCE: sulphurous gel electrolyte for valve-regulated batteries containing sulphuric acid, distilled water and silicone oxide according to the invention contains additionally sodium sulphate and Aerosil 200 as silicone oxide with specific surface area of 175.0-225.0 m2/g, at the following content of components, wt %: sodium sulphate 0.9-1.3; Aerosil 200 4.9-5.3; sulphuric acid with density of 1.83-1.84 g/cm3 26.0-29.0; distilled water - the remaining share. The method for electrolyte manufacturing includes batchwise introduction of solid components to liquid components of the electrolyte and their stirring. The preset quantity of sulphuric acid with density of 1.83-1.84 g/cm3 is fed to stirred distilled water in order to reach density of sulphurous electrolyte of 1.24±0.005 g/cm3, thereupon the electrolyte is cooled down up to temperature less than 15°C; to the electrolyte stirred by stirrer with the preset rotation rate sodium sulphate is fed uniformly and stirred until sodium sulphate is solved completely, upon its solution Aerosil 200 is fed uniformly to the stirred mixture and the obtained mixture is stirred until gel is formed, at significant increase in rotation rate the ready gel acquires the preset value of viscosity.

EFFECT: improved conductivity and density of discharging current in lead-acid batteries due to improved impregnation of porous active mass for electrodes and separators with electrolyte.

2 cl, 1 tbl, 11 ex

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, namely to method of filling sealed lead-acid accumulators with gel-like sulphuric acid electrolyte. Method involves filling of sealed lead storage battery with sulphuric gel-like electrolyte by creating negative pressure of gases in accumulator, feeding electrolyte and holding for impregnation of porous active mass of electrodes and separators with electrolyte, wherein evacuation and supply of electrolyte is made cyclically, and holding is performed at atmospheric pressure of gases. Fabricated accumulator has larger by 15-20 % value of current density in nominal and peak discharge modes, as well as higher by 11-20 % capacity and specific energy. Optimal value of negative pressure of gases in storage battery at cyclic filling with gel electrolyte makes 40-60 kPa, and duration of holding for impregnating pores of active masses of accumulator is 20-30 seconds.

EFFECT: technical result of invention is increased specific energy and density of discharge current of lead-acid battery due to improved impregnation of porous active mass of electrodes and separators of electrolyte.

1 cl, 1 tbl

FIELD: pulp and paper industry.

SUBSTANCE: invention relates to paper for pasting to be used in a lead-acid battery for supporting the lead paste containing natural fibres, thermoplastic fibres and a water-retaining agent including the resin of polyamine-polyamide-epichlorohydrin. Also proposed is a lead plate containing a metal grid coated with a paste contacting with the said paper for pasting, as well as a method of making the lead plate and a lead-acid battery unit with the paper for pasting.

EFFECT: improved cyclic resource of a lead-acid battery, as well as preventing short-circuiting between lead plates is the technical result of the invention.

13 cl, 3 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the production technology for lead-acid batteries and may be used in the manufacture of lead-acid battery and positive electrodes of accumulator batteries. The battery paste includes lead oxides - PbO and Pb3O4, electrolyte of sulfuric acid in the amount providing formation of 11.21 wt % ± 5 rel.% lead sulphate and oxide compounds in the crude pre-made paste. The paste also includes titanium dioxide as an expander, a porous hydrophilic microfiber based on polyester, a highly amorphous pyrogenic silicon dioxides, a metal sulfate from alkali metals, together with aluminum sulphate and deionized water in the amount providing the paste moisture of 15.0 wt % ± 5 rel. %. the method for preparing the paste comprises charging the mechanical mixer with paste components in the specific sequence at 140-220°C or from 60 to 80°C. When the temperature drops to 45°C the paste mixing is finished and operations of its process control are performed.

EFFECT: invention provides an increase in the durability of the positive active mass of the electrode plates and a discharge capacity in the long discharge mode while reducing the rate of degradation at high charge-discharge currents and reducing the internal resistance.

6 cl, 22 dwg, 9 tbl

FIELD: electrical engineering; separators for sealed absorbed-electrolyte lead batteries.

SUBSTANCE: proposed glass fiber blanket separator characterized in optimal porous structure aiding in complete absorption of electrolyte is, essentially, composition of microporous spatula glass fibers of microscopic thinness, fiber mean diameter being 0.35 to 0.40 and 0.22 to 0.25 μm and chemically resistant latex as binder, proportion of components being as follows, mass percent: fiber whose mean diameter is between 0.35 and 0.40 μm, 78 - 80; fiber whose mean diameter is between 0.22 and 0.25 μm, 15 - 17; chemically resistant latex, the rest.

EFFECT: reduced electrical resistance and enhanced mechanical strength ensuring high separating properties.

1 cl, 1 tbl, 4 ex

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