The method of filling the electrolyte nickel-hydrogen rechargeable battery
(57) Abstract:The invention relates to the production of batteries, in particular to a method of filling electrolyte. The method of filling the electrolyte Nickel-hydrogen rechargeable battery includes a vacuum impregnation of the electrodes by the electrolyte to complete the filling and removal of surplus electrolyte evaporation of water. Before vacuum impregnated in the electrolyte and subsequent charging of the battery is heated to a temperature of 60 - 85oC. Evaporation of excess water from the electrolyte is from preheated to a temperature of 70-85oWith the battery in the camera, which supports a pressure equal to the elasticity of steam on the final electrolyte concentration. The determination of the number of remote water produced by condensation and measure its volume. The technical result improved filling electrolyte. 2 C.p. f-crystals, 1 Il. The present invention relates to the field of electrical engineering and can be used when filling chemical current sources, namely for filling electrolyte Nickel-hydrogen rechargeable batteries filterpresses design with a common gas manifold.Known methods of filling e the necessary degree of filling electrolyte electrochemical group is provided with a tank, from which the electrolyte gets into the electrochemical group with special porous wicks.Thus, in the method according to PCT application N 99-11626 (H 01 M 10/34, etc. 04.10.90 g) is proposed to bring the electrolyte to the Nickel oxide electrode through the absorber from the module in which it is located. This design does not provide a complete soaking then electrochemical group of batteries because of their residual gazonapolnennoi and hydrophobicity. Not a complete soaking reduces the active surface of the Nickel oxide electrode. In addition, it leads to increase in weight and size characteristics of the Nickel-hydrogen rechargeable battery and overall deterioration of specific energy characteristics.In the method described in U.S. patent N 5173376 (H 01 M 12/08, etc. 28.10.91 g), it is proposed to bring the electrolyte to the separator through the wick from electrolyte-adsorption layer. This method of filling electrolyte battery also does not provide a complete soaking Nickel oxide electrodes for the same reasons as the above method, and in addition, the battery has large dimensions. In addition, this method is desirable when filling electrolyte battery comprising a number of the considerably reduces the life of the battery.In U.S. patent N 5128600 (H 01 M 10/10, etc. 17.12.90 g) described a method of removing excess electrolyte in a sealed battery by attaching the full battery of the battery to the collector of the electrolyte through the porous filter and subsequent charging of the battery at a given speed for a certain period of time. Released during oxygen creates pressure that pushes the excess electrolyte from the battery cells through the filter in the collection of the electrolyte. Control over the removal of the electrolyte is carried out by measuring the emitted charge of oxygen. This method does not provide an atomic uniformity of filling the electrolyte in view of the fact that the intensity of the oxygen evolution may change according to the battery cells, and therefore, the number of remote electrolyte of each item will be different.Closest to the claimed method of filling electrolyte Nickel-hydrogen rechargeable battery is a way of charging the electrolyte is carried out using the apparatus described in the author's certificate N 1820427 (H 01 M 2/36, etc. 05.04.91,)
According to the method of filling electrolyte battery is suggested to be conducted using a preliminary degassing. Doserates a special indicator. Then measure the value of the free gas space and remove excess electrolyte by extrusion pressure.The disadvantage of this method is that it does not ensures complete filling electrolyte pore volume of the battery, since the displacement of the excess electrolyte is not ensured uniformity in its removal of the battery cells in mind possible differences porous volume between the individual elements. In addition, this method does not provide a complete soaking then electrochemical group battery in consequence of their residual gazonapolnennoi and hydrophobicity. This leads to reduction of the active surface of the Nickel oxide electrodes.In addition, this method is desirable when filling electrolyte battery, consisting of several elements in a single housing, because in applying it possible partecke electrolyte between the elements, which significantly reduces the lifetime of the battery. When filling same data by way of batteries in a single vessel is not removed electrolyte with the outer surface of the battery, which leads to the formation of electrolytic bridges between the elements and thus reduces the resource R is ical-hydrogen rechargeable battery, to ensure maximum filling electrolyte electrochemical pore space group battery and then put it in the number and concentration to the required size.To solve the problem stated way of charging the electrolyte Nickel-hydrogen rechargeable battery comprising vacuum impregnation of the electrodes by the electrolyte to complete the filling and removal of surplus electrolyte evaporation of water, additionally comprising heating the Nickel-hydrogen rechargeable batteries before vacuum impregnation and subsequent operations until the temperature 60-86oC, evaporation of excess water from the electrolyte of preheated to a temperature of 70-85oC Nickel-hydrogen rechargeable batteries in the camera, which supports a pressure equal to the pressure of elasticity pair over a given electrolyte concentration, and the determination of the number of remote water by condensation and measure its volume.Pre-heating the Nickel-hydrogen rechargeable battery to a temperature of 60-85oC before the evacuation and subsequent impregnation ensures removal from the pores electrochemical group of air and water that leads to and what about soaking.The volume of the electrolyte, which must be left in the battery for drying (reducing the amount of electrolyte to a predetermined value) is set on the basis of the experimentally determined dependence of electrical characteristics from electronicsalready. Depending on the structure and composition of the electrochemical components of the group the value of the optimal electronicsalready can vary from 60 to 90%. According to the claimed technical solution reducing the amount of electrolyte to a predetermined value is performed on pre-heated to a temperature of 70-85oC batteries in the camera, which supports a pressure equal to the pressure of elasticity pair over a given electrolyte concentration.The claimed temperature range due to the following. The battery's temperature is below 70oC does not provide a fast and efficient evaporation of water vapor from alkaline electrolyte.When the battery's temperature is above 85oC irreversible structural changes of the active mass of the Nickel oxide electrode, which lead to the loss of electric battery capacity.The determination of the number of remote water, according to the present method, is produced by its condensate, according to the present invention, is as follows according to the scheme shown in the drawing.The assembled battery is placed in the chamber refills (1) and check for leaks. The camera refills and within it the battery is heated using the inside of the heater (9) power supply (5) to a temperature of 60-85oC. the temperature Control is conducted with the help of the sensor (10). Then spend the vacuum chamber refills, when opening the valve (14) system vacuum (2), together with the battery for at least 6 hours at a pressure of not more than 0,1105PA (0.1 kg/cm2). Pressure control pressure gauge (11). Then fill the chamber filling with electrolyte from the tank through the valve (12) to fill the battery. Closing the valve (14) to fill the space above the mirror of the electrolyte in the chamber filling with argon, opening the valve (13), - supply system argon (3). The battery is kept in the electrolyte within 6 hours, while controlling the temperature. After holding the electrolyte from the chamber refills squeeze argon in the tank (4) through the valve (12) and pull the camera filling to remove any residual electrolyte from the inner surface.To bring the volume of the electrolyte to a predetermined value gradually reduces the Dreux (6), after that, the valve (14) is closed. Water evaporating from the electrolyte, condense in the heat exchanger (7), which is cooled by the coolant through the heat exchange system (8). The coolant can serve as water. The temperature should be sufficient to condense and to determine the concentration of the electrolyte (end) and the vapour pressure in the chamber refills. After collecting a specified number of condensate disable the heating chamber filling and fill it with argon to atmospheric pressure. When the battery has cooled, it is removed from the chamber filling and placed in technological capacity, filled with argon.The described method was performed 40 refilling electrolyte Nickel-hydrogen rechargeable battery of the type NV-100 and 10 refills battery type NB-4. The inventive method showed high reproducibility by adjusting the amount of electrolyte in a Nickel-hydrogen rechargeable battery to a specified value. The most effective the inventive method when filling electrolyte Nickel-hydrogen rechargeable batteries, battery cells which are in a single vessel.Sources of information
1. PCT N 99/11626, H 01 M 10/34, etc. 04.10.90,2. Paten the construction of the USSR N 1820427, H 01 M 10/10, etc. 17.12.90, 1. The method of filling the electrolyte Nickel-hydrogen rechargeable battery comprising vacuum impregnation of the electrodes by the electrolyte to complete the filling and removal of surplus electrolyte evaporation of water, characterized in that before vacuum impregnated in the electrolyte and the subsequent operations of charging the battery is heated to a temperature of 60 - 85oC.2. The method of filling the electrolyte Nickel-hydrogen rechargeable battery under item 1, characterized in that the evaporation of excess water from the electrolyte is provided from pre-heated to a temperature of 70 - 85oC batteries in the camera, which supports a pressure equal to the pressure of elasticity pair over a given electrolyte concentration.3. The method of filling the electrolyte Nickel-hydrogen rechargeable battery according to p. 2, characterized in that the determination of the number of remote water is carried out by condensing and measuring its volume.
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.
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
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.
SUBSTANCE: proposed hermetically sealed nickel-hydrogen storage battery has block of electrochemical groups placed in case, interconnected through current duct, and isolated from each other by means of gas separator made in the form of double-line intersection of threads with their lines relatively offset, ratio of thread diameter to distance between threads being chosen between 0.4 and 1, respectively. Gas separator threads are made of polypropylene and thread diameter is minimum 0.9 mm.
EFFECT: reduced mechanical thrusts on hydrogen electrode and, consequently, enhanced reliability of battery.
1 cl, 5 dwg, 1 tbl
FIELD: electrical engineering; storage batteries for off-line power supply systems.
SUBSTANCE: proposed method for servicing metal-hydrogen storage batteries in off-line power supply system includes conduction of charge-discharge cycles, bypass of battery cells having lower capacity by means of discharging bypass diodes, and voltage measurements across each cell. Battery charge is commenced with open-circuit voltage measurement across each cell and if cell is found whose voltage is below specified value of their electrochemical pair, standard battery charge is made upon trickle charge that excludes explosion-hazard concentration of oxygen-hydrogen mixture; after that open-circuit voltage across cells is measured again, and if no cell whose voltage is below specified value of electrochemical pair is found, battery is placed on standard charge, otherwise trickle charge is repeated. In addition, open-circuit voltage of cells is repeatedly measured in 15 - 20 minutes after trickle charge of storage battery.
EFFECT: enhanced service life and operating reliability of storage battery.
2 cl, 1 dwg
FIELD: electrical engineering; servicing nickel-hydrogen batteries in off-line power systems.
SUBSTANCE: proposed nickel-hydrogen storage battery has n series-connected cells shorted out by means of bypass diodes in charge and discharge directions and by throwaway shorting devices. Proposed method includes conduction of charge-discharge cycles and shorting of defective cell by means of throwaway shorting device. Prior to shorting bypass diodes are checked for current carried by their circuits and check results are referred to in shorting the cell, heating elements of throwaway shorting device being inserted in bypass-diode circuits.
EFFECT: enhanced reliability and facilitated procedure of shorting defective cell.
4 cl, 2 dwg
FIELD: electric engineering, possible use during operation of nickel-hydrogen accumulator batteries primarily in autonomous electric power systems of geostationary Earth satellites.
SUBSTANCE: method for exploitation of hermetic nickel-hydrogen accumulator battery in autonomous electric power system of Earth satellite is realized by performing charge-discharge cycles, and disabling battery charge on fall of hydrogen pressure in accumulators down to controlled lower level.
EFFECT: increased reliability of method for operation of nickel-hydrogen accumulator battery with preservation of efficiency of its usage, which is achieved due to disabling of charge after receipt, from controlled lower level of accumulators charge, of capacity of predetermined value, with limiting of maximal allowed temperature of accumulators, while value of capacity is corrected during exploitation of accumulator battery based on level of accumulators temperature reached at the end of charge.
FIELD: electrical engineering; metal-gas chemical power supplies such as nickel-hydrogen ones.
SUBSTANCE: proposed nickel-hydrogen battery has sealed can and cover with terminals, as well as electrode block; it is also provided with battery charge checking device incorporating diaphragm unit built integral with battery sealed can; strain-gage transducer is tuned into threaded joint of its elastic center resting on measuring diaphragm; battery charge checking device is also provided with adjusting resistors brought out to contact strip disposed on battery can.
EFFECT: enhanced mass-and-size specific characteristics, reparability, and adaptability to measuring systems.
1 cl, 2 dwg
FIELD: electrical engineering; chemical current supplies such as nickel-hydrogen storage batteries.
SUBSTANCE: proposed nickel-hydrogen storage battery has case accommodating storage cells interconnected by means of power buses into power circuit and bypass devices; the latter have cylinders accommodating packageless charge and discharge diodes and filled with heat-conducting material; cylinders are installed in battery case and secured therein by means of flanges. Bypass device is assembled on packageless diodes, current being taken off all surfaces of the latter and protection against impact of space environment factors being afforded by battery case proper which makes it adaptable to prior-art batteries of this type; in addition, device has no shielding case of its own which reduces its mass and size.
EFFECT: reduced mass and size, enhanced reliability of protection against impact of space environment factors.
1 cl, 2 dwg
FIELD: electricity; physics.
SUBSTANCE: according to invention, method of nickel-hydrogen battery operation in artificial earth satellite stand-by power supply system includes charge-discharge cycles with limiting charging by pressure sensors installed on control batteries of the main battery, battery storage in full-charge state and periodic recharging to compensate battery self-discharge capacity during storage. Self-discharge currents in control batteries are additionally controlled by external discharge circuit. External discharge circuit can be made as: - resistor with R=1.25/(Ismax - Iscontr), where Ismax - maximum current of battery self-discharge and Iscontr - self-discharge current of control battery, -series circuit consisting of diode and resistor with R=(1,25 - UD)/(Ismax -Iscontr), where UD - voltage drop at diode, Ismax - maximum current of battery self-discharge and Iscontr - self-discharge current of control battery; - series circuit of two diodes and resistor with R=(1.25 - 2UD)/(Ismax - Iscontr), where UD - voltage drop at diode, Ismax - maximum current of battery self-discharge and Iscontr - self-discharge current of control battery; - current stabiliser. Also, external discharge circuit is switched during battery operation and time of on-line state is controlled depending on current battery capacity. Level to stabilised current is controlled during battery operation within the range from 0 A to (Ismax - Iscontr) A, where Ismax -maximum current of battery self-discharge and Iscontr - self-discharge current of control battery.
EFFECT: increase in nickel-hydrogen battery effectiveness of use and improvement of reliable operation.
6 cl, 6 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used when using nickel-hydrogen accumulator batteries mainly in self-contained electric power supply systems of artificial Earth satellites. According to the invention, the method of using a nickel-hydrogen accumulator battery involves charging, storage in charged state with periodic charging, discharging and controlling temperature of accumulators using heat sinks, which are thermally interfaced with cylindrical surfaces of the accumulators. The accumulator battery for realising the method contains accumulators, mounted in to the heat sink through an electrically non-conducting sealing material.
EFFECT: increased reliability of using a nickel-hydrogen accumulator battery due to additional control of temperature of the surface of accumulators which are not thermally interfaced with the heat sink.
2 cl, 2 dwg
SUBSTANCE: bipolar battery has a positive monopolar electrode assembly, a negative monopolar electrode assembly, at least one bipolar electrode assembly stacked between the said positive electrode assembly and the said negative electrode assembly, an electrolyte layer between each pair of neighbouring electrode assemblies, and a lining around each of the said electrolyte layers. Each of the said electrolyte layers is sealed by its corresponding lining and corresponding pair of neighbouring electrode assemblies. The lining is configured to level each of the said neighbouring electrode assemblies. The bipolar battery also has a case for preserving seals created by the linings.
EFFECT: improved sealing.
18 cl, 25 dwg
SUBSTANCE: invention relates to a precursor of a compartment of a negative electrode for rechargeable metal-air batteries, comprising a stiff body (1), at least one membrane (2) of solid electrolyte, a protective coating (5) fully covering the inner surface of the membrane (2) of solid electrolyte, a metal current collector (3), pressed to the inner surface of the protective coating (5), and also preferably a unit (4) of elastic material pressed to the current collector and substantially filling all internal space formed by walls of the rigid body and solid electrolyte (2), and also a flexible electronic conductor (6), tightly stretching via one of the walls of the stiff body. This invention also relates to a compartment of a negative electrode with a stiff body produced from the specified precursor, and to a battery comprising the specified compartment of the negative electrode. The suggested "precursor" corresponds to the empty compartment of the negative electrode, which is filled as a result of an electrochemical reaction and has sufficient mechanical strength.
EFFECT: availability of the specified compartment makes it possible to increase efficiency of a battery.
17 cl, 4 dwg, 1 ex