Thermal lithium current source

IPC classes for russian patent Thermal lithium current source (RU 2521097):

H01M6/36 - containing electrolyte and made operational by physical means, e.g. thermal cells (thermoelectric solid state devices H01L0035000000, H01L0037000000)

Another patents in same IPC classes:

Heat-accumulating composition / 2514193

Present invention relates to a heat-accumulating composition which contains lithium fluoride, lithium bromide and potassium bromide, wherein to expand the range of concentrations with a low melting point, the heat-accumulating composition further contains lithium molybdate, with the following ratio of components, wt %: lithium bromide 52.75; potassium bromide 45.03; lithium molybdate 0.87; lithium fluoride - the balance.

Thermal chemical current source / 2508580

Thermal chemical current source includes unit of electrochemical cells in housing with a cover, inner thermal and electrical insulation, pyrotechnical heating elements and electrochemical cells, each of them contains in alternating sequence hard layers of anode, electrolyte, cathode in estimated amount, pressed by elastic member and provided with thermal and electrical insulation, alternating pressure seals for connection to external consumer, activation system. Each layer of electrochemical cells and pyrotechnical heating elements is designed with central through hole, all the electrochemical cells are accumulated in sequence on the central insulated rod, which is rigidly fixed by its one end on housing bottom by sleeve and by the other end on housing cover by basement which is a solid figure in the form of a flat sphere from stainless steel with support feet.

Thermal chemical source of current / 2507642

Body of a thermal chemical source of current comprises two diametrically arranged compartments with blocks of electrochemical elements placed into them, which are electrically not connected to each other and receive initiating pulses from an ignition device, enclosed into a cylindrical shell directed with an open end towards a flame force splitter, made in the form of a triangular prism, installed in the centre on a metal partition that separates compartments, at the same time the sharp angle between the faces of the prism facing towards the ignition device makes (70-80)°. Positive effect may be increased by making several compartments at one level relative to the base of the body. In this case the flame force splitter shall have the form of a pyramid with the number of faces corresponding to the number of compartments. At the same time the angle of the pyramid top facing the ignition device corresponds to the above.

Electrolyte for chemical current sources / 2506669

Invention refers to power engineering, in particular to development of compositions of lithium salts which can be used as melted electrolytes for chemical current sources. In order to expand range of concentrations with low melting temperature the suggested composition includes lithium wolframate as lithium salt with the following ratio of components by wt %: lithium bromide 68.97-71.83; potassium bromide 24.84-25.42; lithium molybdate 0.47-5.06; lithium wolframate 0.3-3.10.

Melted electrolyte for chemical current source / 2506668

Invention refers to electrical engineering, in particular, to development of melted electrolytes based on lithium and potassium salts for chemical current sources. Melted electrolyte for chemical current source that includes lithium metavanadate and potassium salts is distinguished by the fact that among potassium salts it contains bromide and metavanadate with the following ratio of components, by wt %: lithium metavanadate 33.26-35.20, potassium bromide 4.79-7.72, potassium metavanadate 57.08-61.11.

Molten electrolyte for chemical current source / 2489777

Molten electrolyte for a chemical current source, which contains lithium nitrate and bromide, further contains potassium bromide, with the following ratio of components, wt %: lithium nitrate 41.53-45.46, potassium bromide 24.07-25.80, lithium bromide 30.47-32.67. The disclosed electrolyte composition enables to lower the melting point of the electrolyte by 14-25°C and specific enthalpy of fusion by 99-87 kJ/kg.

Electrolyte for chemical current source / 2489776

Electrolyte for a chemical current source, which contains lithium and potassium nitrates and a potassium halide, further contains potassium bromide, with the following ratio of components, wt %: lithium nitrate 31.2-35.96, potassium bromide 7.25-7.79, potassium nitrate 56.79-61.01.

Thermal lithium current source / 2475898

Package of electrochemical elements and pyrotechnic heaters is affixed to the lid with the help of tension strips. The initiating pyrotechnic bands are affixed to mica plates, placed into the gap between the side surface of the package of electrochemical elements and the tension strip affixing the package to the lid, with subsequent application of (0.3-0.6) mm organosilicate coating on the package side surface, the coating strongly fixed along the perimeter with a glass-cloth tape impregnated with an organic-silicon varnish.

Method for manufacture of thermal insulation for thermal lithium current source / 2475897

Proposed is a method for manufacture of insulation for a thermal lithium current source by way of pressing thermally insulating gaskets of a composition including finely dispersed silicon oxide with specific particle surface over 250 m/g, chrome oxide, ultrathin silica fibres and phenolformaldehyde resin.

Method to assemble thermal chemical source of current / 2470416

Invention relates to electrical engineering and can be used in production of thermal chemical sources. According to the invention, the unit of electrochemical elements is pressurised on the cover with pressure in the range of (30-40) MPa, afterwards in the pressed condition height of the unit is measured, and based on the difference between the depth of the body and the height of the unit a gap is identified, which is filled with a set of asbestos gaskets pressed by the same pressure as the unit, at the same time the actual thickness of the set exceeds the rated one by (0.4±0.1)mm.).

/ 2260228

/ 2301479

/ 2320053

/ 2326470

Thermal battery / 2369944

Invention is related to reserve chemical sources of current on solid body. According to invention thermal battery (TB) comprises unit of electrochemical elements (ECE), every of which consists of design number of solid layers of anode, cathode, electrolyte, heating elements, limited from external side by common body with heat and electric insulation. Unit of electrochemical elements (ECEU) is installed along vertical axis of body, is pressed in axial direction with specified force of design number of elastic elements with the possibility of this force value control by means of threaded element, additionally at ECEU ends there are passive ECE installed by one, body of TB is arranged as cylindrical of stainless steel with thickness of walls from 0.5 to 1 mm, anode of each ECE is made of single alloy LiB, cathode - out of mixture NiCl₂ and electroconductive additive, electrolyte from mixture of thickener and eutectic, comprising salts of alkaline metals, from internal and end sides of cylindrical body there are layers of heat and electric insulation, between layers of active masses there are solid layers of heating elements, in cylindrical body there are through vertical slots in the form of windows, total area of which does not exceed 80% of its total side surface.

Thermal chemical current source / 2393591

Thermal chemical current source is activated by primer device in the unit end side. Z-shaped pyrotechnical strip is positioned in direct vicinity of the primer device in heat insulation pad slots along the diametre and transmits fire impulse from primer device to initiation strip mounted on opposite side surfaces of the unit and igniting pyrotechnical heaters of cell unit. Free state of pyrotechnical strip, required for fast and reliable fire impulse transfer from primer device to lateral initiation strips, is achieved by strip placement in heat insulation pad slots positioned at 180° to each other, with slot length of 0.54÷0.65 of the pad diametre. The effect can be amplified by installation of several Z-shaped pyrotechnical strips tilted against each other and contacting respective number of lateral initiation strips, in unit end sides. Maximum reduction of time of current source deployment to operation mode can be achieved by replacement of lateral initiation strips with thin pyrotechnical strip encircling at least 70% of the unit perimetre length.

Thermal source of current / 2413341

Thermal current source (TCS) comprises unit of electrochemical elements (ECE) in vessel in heat insulation, every of which comprises serially alternating solid layers of anode, cathode, electrolyte, heating elements in rated quantity, bordered at outer side by a common vessel with heat insulation, elastic element rigidly fixed on cover of TCS and arranged along vertical axis of vessel and pressed with specified force in axial direction with the possibility of adjustment of value of this force, indicator of initial condition control, facility of TCS initiation with system of electric igniters. Unit of ECE, system of electric igniters, initial condition control indicator (ICCI) of TCS are rigidly fixed on common base, rigidly fixed on cover of TCS in the form of printed circuit board. Electric circuit of ICCI is arranged in the form of printed conductor and is arranged between output contacts of ICCI. TCS comprises two elements - isolators arranged of copper wire with cross section area that is much less than area of section of printed conductor, at the same time in the centre of each element - isolator there are additionally installed pyrotechnical heaters arranged in the form of ribbon of material on the basis of pressed mixture of powdery titanium and oxidant, sensitive to heat pulse of electric igniters.

Thermal chemical current source / 2448393

Initiating pyrotechnical strips are tightly pressed to a unit of elements with a glass-woven tape with thickness of (0.12-0.15) mm, impregnated with a organosilicic varnish and forming a tight shell by coverage of layers by at least 1/2 of the tape width.

Method of manufacturing of pyrotechnical heater for thermal chemical current source / 2450390

Heating tablets are pressed at pressure of 200-300 MPa with hold pressure of within 20-30 s until density of 4.6-4.9 g/cm³ is obtained at average degree of powdered iron dispersion of 1.0-2.5 mcm and 4.9-5.2 g/cm³ at average degree of powdered iron dispersion of 2.5-5.0 mcm respectively.

Electrolyte for chemical current source / 2453014

Electrolyte for chemical current source includes lithium salts at the following ratios of components (wt %): lithium chloride: 4.2…4.3; lithium bromide: 30.6…31.5; lithium metavanadate: 29.9…30.3; lithium molybdate: 34.4…34.8.

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering industry and can be used in production of thermal chemical sources. According to the invention in the thermal lithium current source between a capsular-type ignition device and Z-shaped pyrotechnical strip there is a metal disc with diameter equal to the diameter of the unit of electrochemical cells and with a central opening equal to 0.25-0.50 of width of the Z-shaped pyrotechnical strip.

EFFECT: installation between the capsule and unit of electrochemical cells of the above metal disc with diameter equal to the diameter of the unit and the central opening allows to exclude influence of kinetic energy of incandescent particles from the ignition device to the unit of electrochemical cells and to stabilise optimal delivery of incandescent gas to the pyrotechnical strip.

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The present invention relates to the electrical industry, can be used in thermal lithium power sources.

Known thermal ion source current [Figures and other Thermal chemical current sources, p.71. Publishing house of Rostov University, 1989], containing enclosed and sealed by the lid unit recruited from consecutive electrochemical elements and pyrotechnic heater block is surrounded by insulating spacers, and in its Central part is made igniter channel which is connected with the firing device capsule type.

When casting in working condition igniter capsule type force creates a flame which is directed to the igniter channel electrochemical elements. Having high kinetic energy, the flow of force of the flame deforms the extreme elements of the block, breaking their stable operation. Glowing particles of force flame rush into igniter channel with great speed. In the nearby firing the pyrotechnic device block heaters do not have time to warm up and ignite. Their ignition is carried out from adjacent heaters.

These factors reduce the stable time source output current operating conditions, lead to a number of banian voltage at the initial stage of the work. The presence of the igniter channel reduces the working area of electrochemical elements, which reduces the specific electrical characteristics of the current source.

The closest in technical essence and the achieved results is thermal chemical ion source current [Patent RU No. 3293591 C1, CL NM 6/36, 24.04.2009,] containing enclosed and sealed by the lid unit recruited from consecutive electrochemical elements and pyrotechnic heaters, insulating strips with grooves that are installed on the periphery and ends of the block; on the side of the unit installed diametrically initiating quickmatch bands touch at the end of the commercial strip of Z-shaped form, is laid across the diameter of the block between the insulating spacers located in the immediate vicinity of the firing device.

A disadvantage of the known current source is a low reliability due to the unstable time of the ramp and voltage fluctuations at the initial stage, when to bring it in working condition used igniter capsule type.

This is because the igniter capsule type casting in working condition creates, unlike electropole is Italia, directed towards electrochemical elements force the flame with high kinetic energy. The shock wave that flame deforms adjacent to the primer electrochemical block elements, which leads to inter-element short-circuits, voltage fluctuations at the initial stage and, ultimately, to the low reliability of the power source. At the same time the shock wave destroys the initiating pyrotechnic band. This leads to its unmanaged fire and, as a consequence, instability time output source current operating mode.

The aim of the present invention is to improve reliability and stabilization time output mode heat lithium power source contained in the operational status of the firing device capsule type.

With this purpose it is proposed thermal chemical current source, containing enclosed and sealed by the lid unit recruited from consecutive electrochemical elements and pyrotechnic heaters, insulating strips are installed on the periphery and ends of the block; on the side of the unit installed diametrically initiating quickmatch bands touch at the end of the commercial strip of Z-shaped form, is laid across the diameter b of the eye between the insulating strips with grooves located in the immediate vicinity of the firing device, characterized in that between the firing device capsule-type and Z-shaped pyrotechnic strip has a metal disk with a diameter equal to the diameter of electrochemical elements, with a Central hole of diameter equal to 0,25-0,50 width pyrotechnic band.

Installation between the cap and the block elements of the electrochemical metal disk with a diameter equal to the diameter of the block with a Central hole, eliminates the influence of the kinetic energy of the hot particles from the ignition device capsule type electrochemical elements and allows to stabilize the flow of the hot gases to the pyrotechnic zone.

Optimal stabilization of the process of ignition of pyrotechnic band and the transmission of the initiating impulse for pyrotechnic heater block elements is achieved when the ratio of diameter to width pyrotechnic strip, 0.25-0.50 in.

When the ratio of the diameter of the Central hole of the throttle disc to the width of the Z-shaped pyrotechnic band less than 0.25, the time output source current operating mode decreases due to the slow combustion pyrotechnic band.

When the ratio of hole diameter to the width of pyrotechnic band greater than 0,50 an uncontrollable influence of the kinetic energy of the force plam is and pyrotechnic band leading to instability time output source current operating mode and deformation extreme electrochemical elements.

Figure 1 shows the proposed current source. In case 1 placed electrochemical elements, recruited from consecutive electrochemical elements 2 and pyrotechnic heater 3, the ignition of which is from diametrically disposed on the side surface of the block of pyrotechnic strips 4 in contact with the Z-shaped pyrotechnic strip 5 that is installed in the end of the block and separated from the cap 6 is attached to the base body 7 a metal disk 8 with an opening 9 in the center. On the ends and the side surface of the block is installed insulation 10.

When casting a current source in the operational status of the kinetic energy of the force of the flame ignition device is extinguished on the metal disk, thus excluding its negative effects on the electrochemical elements. A metered amount of hot particles penetrating through the Central hole of the disk, ignites freely lying between the insulating strips with notches Z-shaped pyrotechnic band, ensuring its stable ignition, independent of the strength of the shock wave.

The firing pulse from this pyrotechnic strip through the side of pyrotechnica is the cue strip is transmitted to the pyrotechnic heater unit electrochemical elements.

The evaluation of the technical results on the current sources produced at the electrochemical system LiSi/KCl, LiCl/FeS₂. Tests have shown that the installation between the cap and the block elements of the electrochemical metal disk with calibrated hole in the center made it possible to eliminate the failures of such current sources and stabilize their time operating mode (deviation from nominal ±4%).

Thermal chemical current source containing placed in a sealed casing and a sealed lid unit recruited from consecutive electrochemical elements and pyrotechnic heaters, insulating strips are installed on the periphery and ends of the block; on the side of the unit installed diametrically initiating quickmatch bands touch at the end of the commercial strip of Z-shaped form, is laid across the diameter of the block between the insulating strips with grooves located in the immediate vicinity of the firing device, characterized in that between the firing device capsule type and pyrotechnic Z-shaped strip has a metal disk with a diameter equal to the diameter of the electrochemical elements with a Central hole of diameter equal to 0,25-0,50 width pyrotechnic Z-shaped Polo is s.