Battery paste and method for its preparation

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 140-220C or from 60 to 80C. When the temperature drops to 45C 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

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to lithium-carrying iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and element, formed from them, to a method of their production, characterised by the stage of nano-milling, at which the micrometric mixed aggregates of the nanometric particles are formed by means of micro-forging. The invention also relates to electrodes and a Li-ionic electrochemical element.

EFFECT: application of claimed invention makes it possible to produce electrode materials making it possible to achieve practical energy density, which is higher than 140 W h/kg, in the lithium-ionic element which can be used to form thick electrodes at the industrial scale.

26 cl, 7 dwg, 1 tbl, 6 ex

FIELD: electricity.

SUBSTANCE: according to the invention for the purpose of manufacturing of active electrode mass gel-polymer electrolyte based on butadiene-nitrile rubber and its copolymers or polyacrylate or styrol and acrylate copolymer is used as a binding agent. Mixing of components is carried out simultaneously with ultrasonic material dispersion. With the following ratio of the mixture components, % (dry weight): active material - 76-96; acetylene carbon black - 0.1-12, gel-polymer electrolyte based on butadiene-nitrile rubber and its copolymers or polyacrylate or styrol and acrylate copolymer - 4-12, and drying of electrodes is made till residual moisture is equal to 0.001%. Gel-polymer or solid polymer electrolytes of variable composition are used as electroconductive and binding agent. The following substances are used as a plasticising agent for gel-polymer electrolyte: propylene carbonate, dimethyl carbonate, diethyl carbonate, and their mixtures with ethylene carbonate; the following substances are used as ionogenic lithium salt: LiPF6, LiClO4, LiBF4, LiAsF6; material of the negative electrode may include natural or synthetic graphites, material of the negative electrode may include LiFePO4, LiCoO2, LiNiO2.

EFFECT: increased specific discharge capacity, reduced ecological risk and improved explosion safety.

2 tbl, 5 ex

Lead-acid battery // 2535303

FIELD: electricity.

SUBSTANCE: in a battery a charge is made periodically during a very short period of time and a high-rate discharge to the load is made in the state of a partial charge. At that a negative active material comprises flaked graphite and formaldehyde, bisphenols and an aminebenzenesulphonic acid condensation product; an average diameter of the flaked graphite primary particles is equal to 100 mcm or more up to 220 mcm; the positive plate comprises a positive plate with the specific area of the active material surface equal to 5.5 m2/g or more; the electrolyte density varies within the range of 1.30 or more and 1.35 and less.

EFFECT: battery has an improved capability of the charge receipt and improved service life.

3 cl, 8 tbl, 2 dwg

Lead-acid battery // 2533829

FIELD: electricity.

SUBSTANCE: invention is related to a lead-acid battery of hydroelectric type comprising a container that includes a pack of plates received by stacking of negative plate with negative active material filled to the negative current collector, positive plate with positive active material filled to the positive current collector and a separator placed in-between; and electrolyte. At that charge is performed periodically while high-speed charge to the load is made in partial charge state. To negative active material at least carbon electroconductive material and organic compound is added; the compound is capable to suppress coarsening of the negative active material in result of charge and discharge and positive plates have the total surface area [m2] of the positive active material per a volume unit of the plate pack [cm3] within the range of 3.5-15.6 [m2/cm3].

EFFECT: usage of this invention allows improvement of charge receiving characteristics and service life of the battery.

24 cl, 7 tbl, 72 ex

FIELD: electricity.

SUBSTANCE: bipolar electrode consists of the first layer of active material, which represents for example the active material layer of a positive electrode, which is formed of the first active material on one side of a current collector, and the second layer of active material, which represents the active material layer of a negative electrode, which is formed of the second active material with lower compressive strength than that of the first active material on the other side of the current collector. Besides, a density controlling additive is added to the second layer of active material, which represents additional material with bigger compressive strength than that of the second active material.

EFFECT: reduction of mechanical stresses in both layers of active material arranged on front and rear surfaces of the current collector when both layers of active material are compressed simultaneously prevents the possibility of distortion of a bipolar storage battery.

10 cl, 13 dwg, 1 tbl, 5 ex

FIELD: electricity.

SUBSTANCE: paste for negative electrode contains plumbum dust, H2SO4, expander that includes BaSO4, sodium lignosulphonate and water, additionally it contains soft carbon with the following proportion of components, wt %: H2SO4 8-10 BaSO4 0.3-0.5 sodium lignosulphonate 0.1-0.2 soft carbon 0.2-0.3 water 7-8 plumbum dust the rest, note that BaSO4 grain size does not exceed 10 nm; additionally the paste can contain polyvinyl-chloride fibre in quantity of 0.03-0.06 wt %. Method of preparation of paste for negative electrode by mixing plumbum dust, H2SO4 and expander consists in, first, mixing of plumbum dust and expander for 8-15 minutes, then adding of water, the mixture is stirred for 8-15 minutes, after that H2SO4 is added during stirring with speed 0.7-0.8 l/min, note that the mixture temperature is maintained within 30-70C.

EFFECT: increase of battery service life and prevention of battery capacity loss.

FIELD: electricity.

SUBSTANCE: according to the invention, the paste for the positive electrode of the lead accumulator contains a lead powder, a sulfuric acid, an silicon oxide of trade marks "Silicon dioxide", GOST 9428-73 (PFK KHIMLUKS, Moscow) or "Ekosil-melur - 3" (LLC Trading House "Quartz", St. Petersburg (GU).

EFFECT: development of a paste that is most simple in a technological respect, provides for high mechanical strength of positive electrodes with preservation of their high porosity, kinetic capacitance and their increased service life.

1 tbl

FIELD: electricity.

SUBSTANCE: powder of intermetallic compound containing dopants, with carbonyl nickel powder at the following component ratio, wt %: intermetallic compound with dopants 85-94, carbonyl nickel 6-15. The obtained mixture is subject to chemical nickel plating in presence of sodium borane and 20% water solution of nickel sulphate at the following component ratio per 100 g of mixture: sodium borane 2-3 g, water solution of nickel sulphate 63-64 ml. After chemical nickel plating the obtained mixture is dried and organic binding agent is added in ratio of 1.5-2.5 g of binding agent per 100 g of dry mixture.

EFFECT: higher specific discharge characteristics of metal-hydride electrode and simpler technical manufacturing process of active mass with simultaneous reduction of its manufacturing cost.

5 cl, 3 ex, 2 tbl

FIELD: electricity.

SUBSTANCE: to produce active mass of electrodes, aqueous solutions of polyacrylates and their copolymers are used as binder. Mixing of components is carried out simultaneously with ultrasonic dispersion, binder is represented by an aqueous dispersion of polyacrylate or copolymer of sterol and acrylate at the following ratios of mix components, % (wt % of dry substance). Active material: 77-97. Acetylene technical carbon: 1-12%. Aqueous dispersion of polyacrylate or sterol-acrylate: 2-12%, and drying of electrodes is carried out down to residual moisture of 0.005%.

EFFECT: increased specific discharge capacity, reduced ecological risk and lower prime cost of explosion safety.

6 ex

FIELD: bipolar electrodes for lead storage battery.

SUBSTANCE: proposed electrode for bipolar storage cell or battery has plate-like body made of cured polymeric resin incorporating titanium suboxide particles or other electricity conducting dispersed material disposed to form electric circuits. Methods are also proposed for manufacturing pore-free electrode and for testing it for porosity.

EFFECT: reduced electrical resistance, adequate mechanical strength and enhanced electrochemical corrosion resistance.

46 cl, 2 ex

FIELD: electricity.

SUBSTANCE: electrode manufacturing method is implemented by application of active material to substrate, by placing substrate between ribbons of filter materials, by the first and next drawing of substrate through rollers and subsequent cutting of substrate into electrodes. The first drawing of substrate from side of active material is carried by two ribbons made of materials with different porosity and pressed to each other by their surfaces. External ribbon that contacts active material is made of material with high porosity with pore size of 10-70 mcm, e.g. of non-woven polypropylene or polyethylene; internal ribbon is made of material with low porosity and size of pores less than 6 mcm, e.g. of paper. Pressure at the first and next drawings shall be within range of 4.5-11 kg/cm2. Device for electrode production contains forwarding mechanism in the form of belt conveyor, bunker for material application, frame with installed upper and lower receiving driving rolls and feed rolls, roller for the first and next drawing and electrode cutting mechanism. Between rollers for the first and next drawing there are upper and lower filtering ribbons made of low-porosity material and located at respective rolls. Device is equipped with one or two continuous filtering ribbons made of high-porosity material, which are installed at tolls for the first drawing and directly over top of one or two ribbons with low porosity (when substrate is drawn at one or both sides). Width of continuous ribbon corresponds to width of low-porosity ribbon. Support rotating rollers with continuous ribbon are installed at frame. Axes of support rollers are installed in parallel to the first drawing rollers. The first drawing rollers for the first drawing are located inside continuous ribbon runs in the same place as support rollers. Ration of thickness for materials with high and low porosity is 1:1-1:2.1.

EFFECT: reduction of material process losses and reduction of reject rate by weight of active material in electrode.

9 cl, 3 dwg, 5 ex

FIELD: electricity.

SUBSTANCE: band includes first layer (18) of endless fabric structure made from monofilament of high-modulus fibre, second layer (16) containing layers of smooth fabric, which are made from monofilament, and layers of fibrous pad; third layer (14) containing layers of fibrous pad, and fourth layer (12) of endless fabric structure made from monofilament and connected to the third layer (14) by sewing.

EFFECT: providing constant length of band, its incompressibility and hydrophobic behaviour.

15 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: in manufacturing method of electrode band for electrochemical current source at application of active mass from bunker to band the mass is subject to vibration and at the same time impact actions are performed on the applied layer of active mass on the band. Impact actions are performed within 0.3-4.5 of vibroimpact per 1 mm of movement of band and with amplitude of vibrations of 0.2-2.5 mm with frequency of 10-200 Hz. Then, surface sealing is performed by smoothing active mass and excess mass is removed. Device for manufacturing electrode band for electrochemical current source includes vertical bunker having in its lower part an outlet opening, pasting table located under bunker, band broaching mechanism and oscillator of high-frequency oscillations, which is arranged in bunker, and vibrator; end of wall of bunker outlet portion on the side of band outlet is located relative to surface of broaching table with a gap and equipped with adjustable gauging plank. The rest three side walls of outlet bunker portion are equipped with restricting planks installed on lower edges of walls with possibility of vertical movement along them. Planks are spring-loaded to the table with possibility of band pressure crosswise and along its longitudinal edges. Oscillator is made in the form of a plate with through holes and equipped with vertical guides for alignment relative to bunker walls. Working end of oscillator is equipped with shock absorber from elastic polymer material and protrudes above edge of lower bunker portion and is located on the level of lower edges of restricting planks which are in spring-loaded state.

EFFECT: higher strength of obtained electrodes owing to good adhesion of active mass to band and qualitative sealing of active mass.

2 cl, 2 dwg, 5 ex

FIELD: electricity.

SUBSTANCE: as active mass is applied to shunt, highly porous shunt is placed into active mass and is exposed simultaneously to vibrations and shock actions. Direction of shock actions and direction of vibrations of active mass and shunt match and are directed perpendicularly to plane of shunt. After application of active mass, surplus of mass is removed by scraper from external surfaces of shunt down to its initial thickness, dried and calibrated.

EFFECT: increased electric capacitance of electrode by even and full filling of internal volume of pores with active mass.

FIELD: electrical engineering.

SUBSTANCE: method and device for continuous mixing and applying paste on plate grid to be used in lead-acid batteries wherein granulated lead oxide, water and sulfuric acid react in elongated mixer. Note here that mixing-to-transfer ratio approximates from 65:35 to 80:20 with reaction temperature adjustment to produce resultant product temperature varying from about 60C to about 80C. Reinforcing fibers in amount of 0.6% of lead oxide weight, coal powder and graphite powders in amount of 6% of lead oxide weight can be added to said paste.

EFFECT: continuous production of active mass and its uniform application on plates.

15 cl, 10 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: invention refers to electrical industry and can be used for manufacture of lead-acid batteries. According to invention, electrode includes current collector, terminal and active mass. Current collector consists of two nets connected to each other. On surface of nets there located is carbon layer. Terminal is located between nets. Upper edges of nets are above terminal plank and connected to each other. Each of the nets is made from two-layered material. Outer net layer is made from high-adhesive polymer, and inner layer is made from solid polymer or fibre glass or carbon. Ratio of active mass weight to current collector weight is 6.0-16.0. When manufacturing current collector, nets are put one on the other and terminal is arranged between them. Upper edges of nets are located above terminal plank. Then the nets are connected to each other and at the same time, their upper edges and nets with plank and eye of terminal are connected. Current collector elements are connected for example by welding or gluing. Then to current collector surface there applied is carbon layer, for example by thermal or gas flame method, and current collector cells are filled with active mass.

EFFECT: improving specific electrical characteristics.

2 cl, 4 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed device designed for coating current leads of storage battery plates has bed, conveying mechanism, and bin holding puttying members and disposed on conveying mechanism. Novelty is that conveying mechanism is made in the form of two chain-apron conveyers arranged in parallel up to outlet part of bin; end parts of load-carrying aprons of one conveyer are closed to those of other conveyer and form common deck; these conveyers are diverging at certain angle at bin outlet in horizontal plane relative to longitudinal axis of device, outer end parts of aprons being narrowed.

EFFECT: simplified design, enhanced service life and capacity of device.

1 cl, 5 dwg

The invention relates to the electrical industry and can be used for pastravanu arrays of electrodes of the electric battery

The invention relates to electrical engineering and for the recovery of stationary lead acid batteries after their long-term operation

Lead-acid battery // 2535303

FIELD: electricity.

SUBSTANCE: in a battery a charge is made periodically during a very short period of time and a high-rate discharge to the load is made in the state of a partial charge. At that a negative active material comprises flaked graphite and formaldehyde, bisphenols and an aminebenzenesulphonic acid condensation product; an average diameter of the flaked graphite primary particles is equal to 100 mcm or more up to 220 mcm; the positive plate comprises a positive plate with the specific area of the active material surface equal to 5.5 m2/g or more; the electrolyte density varies within the range of 1.30 or more and 1.35 and less.

EFFECT: battery has an improved capability of the charge receipt and improved service life.

3 cl, 8 tbl, 2 dwg

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