Multifunctional cloth for use in lead-acid battery

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

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to separation. Separator has main part of nonwoven material. Note here that said main part is provided with coating. Note here that said coating comprises filler particles and cellulose, said coating containing resilient particles of binder from organic polymers. Note also that filler particles are inorganic filler particles. Filler particles and organic binder resilient particles are bonded by said cellulose. Said separator differs from known designs in that cellulose represents derivatives of cellulose that feature chain length of at least 200 alternating links. Besides, said coating contains non-ionic surfactant in amount of up to 5% per coating solid substance.

EFFECT: perfected design, high permeability.

15 cl, 7 dwg, 6 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of porous membrane suitable for use in electrochemical devices such as various storage batteries, capacitors, etc. Porous membrane comprises cellulose fibres including 5 wt % or more of cellulose fibres (per sum of total mass thereof) with diameter of 1 mcm or more and features tensile strength of 50 Nm/g or larger and/or tenacity of 0.40 kN/m or larger.

EFFECT: possibility of use as an electrochemical device separator with low specific IR.

21 cl, 6 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to porous membrane, which contains cellulose fibres, where area of redispersed cellulose fibre surface, determined by colouring with "Congo red" dye, after redispersion of cellulose fibres of porous membrane in accordance with method of redispersion of normal paper redispersion by JIS P 8120, constitutes from 100 to 300 m2/g. Porous membrane in accordance with invention can be used as separator for electrochemical device.

EFFECT: obtaining sheet material, used in separator and electrochemical device, which has good characteristics of porosity, strength, volume resistance and reasonable cost.

22 cl, 1 tbl, 8 ex

FIELD: machine building.

SUBSTANCE: separator for electrochemical device includes stages of suspension application to the substrate, at least the suspension contains cellulose fibres and hydrophilous agent of pores formation with boiling point 180C or higher; drying of the above mentioned suspension with sheets manufacturing on the mentioned substrate, and sheets separation from the mentioned substrate with separator creation, where the mentioned separator has the volume resistivity 1500 Ohmcm or below, as determined using alternating current with frequency 20 kHz and impregnated by 1 mol solution LiPF6 in propylene carbonate of the separator.

EFFECT: invention ensures creation of the separator for the electrochemical device with high value characteristics, such as low internal resistivity of the electrochemical device, high characteristics of Li screening that can't be provided with use of the nonwoven materials, such as paper; such separator can be obtained with the acceptable price.

17 cl, 1 tbl, 3 dwg, 14 ex

FIELD: process engineering.

SUBSTANCE: set of inventions relates to porous membrane, separator for electrochemical device including said porous membrane and said separator and to method of its production. porous membrane contains cellulose fibres wherein the latter are produced from the mix of over 50 wt % of initial material first cellulose fibres with surface area defined by staining with "congo red" dye and making 250 m2/g or more and 500 m2/g or less; and less than 50 wt % of second cellulose fibres with surface area defined by "congo red" staining and making 150 m2/g or more and less than 250 m2/g.

EFFECT: better properties, acceptable costs.

28 cl, 1 tbl, 8 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of steel retaining plate for fuel cell that features rust and contact resistance at both initial stage and after effects of high temperature and/or moisture content in fuel element for a long time. Proposed method comprises preparation of stainless steel sheet as a metal retaining plate matrix. Intermittent cover film is formed at stainless steel sheet surface. Note here that said cover film contains at least one substance selected from the following matters, i.e. gold (Au), platinum (Pt), ruthenium (Ru), iridium (Ir), ruthenium oxide (RuO2) and iridium oxide (IrO2). Said sheet with intermittent film is thermally treated to form oxide film on the part of stainless steel sheet whereat cover film is not formed.

EFFECT: metallic retaining plate for fuel cell.

11 cl, 12 dwg, 1 tbl, 8 ex

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering. The invention suggests the lithium battery that includes at least two volume electrodes divided by a separator and placed together with electrolyte containing anhydrous lithium salt in an organic polar solvent in the battery casing, each electrode has the minimum thickness of 0.5 mm and at least one of these electrodes contains a homogeneous pressed solution of an electroconductive component and active material that can absorb or set free lithium in the presence of electrolyte, at that porosity of the pressed electrodes is within the range of 25% - 90%, the active material has a hollow sphere structure with the maximum length of the wall of 10 micrometers or an aggregate or agglomerate structure with the maximum size of 30 micrometers, whereat the separator contains a high-porous electric insulating ceramic material with open pores and porosity from 30% up to 95%.

EFFECT: increasing capacity of small-size accumulator batteries.

24 cl, 17 dwg, 7 ex, 1 tbl

FIELD: electricity.

SUBSTANCE: invention is related to manufacture of accumulator battery separators. The method for manufacture of heat-resistant and high-strength separator of a superfine fibre includes the following stages: air-blast electrospinning of the mixed solution containing from 50 up to 70 wt % of heat-resistant polymer material and from 30 up to 50 wt % of swellable polymer material thus forming a porous tissue made of the heat-resistant superfine fibre where heat-resistant polymer material and swellable polymer material are united in the form of the superfine fibre; drying in order to control content of the solvent and moisture remained at the surface of porous tissue; thermal compression of the dried porous tissue at a temperature within the range of 170 and 210C.

EFFECT: invention suggests the porous separator of the superfine fibre with heat-resistance and high strength and the method for its manufacture as mass production of the heat-resistant and high-strength separator of the superfine fibre using air-blast electrospinning (AES), as well as an accumulator battery using such separator.

24 cl, 9 dwg, 2 tbl, 7 ex

FIELD: electricity.

SUBSTANCE: present invention relates to material for making a proton-exchange membrane for an electrochemical device, particularly a fuel cell, an electrolysis cell or an accumulator. Activated boron contained in a matrix is boron nitride which is activated by a liquid containing radicals and/or ions of an acidic or alkaline solution for forming bonds in the boron nitride in the presence of an electric field, before use thereof to make said electrochemical device. The membrane is impermeable to hydrogen at pressure of 1 bar.

EFFECT: proton-exchange membrane according to the present invention provides high mechanical and thermal stability and operates at a relatively high temperature and at room temperature.

29 cl, 11 dwg, 4 ex, 2 tbl

FIELD: electrical engineering.

SUBSTANCE: invention subject is a monolayer thermostable and/or microporous sheet with a base made of fibres where the base contains supports and made of a bonding material that is stitched together. The invention subject is also such sheet production method, application and devices containing the said sheet.

EFFECT: sheet material thickness decrease combined with high porosity, ion conductivity and thermostability.

15 cl, 1 tbl, 6 ex

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 (5.69%) 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: 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; 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; 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 production of batteries, in particular to a method of filling electrolyte

The invention relates to the field of electrochemistry, and more particularly to the use of special additives to improve the technological properties of electrolytes in lead-acid 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

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 (5.69%) 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 1.240.005 g/cm3, thereupon the electrolyte is cooled down up to temperature less than 15C; 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

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