1138 results about "Electrochemical cell" patented technology

An apparatus is dedicated to controlling the voltage of a battery comprising at least two modules connected in series and each comprising at least one electrochemical cell, and each coupled to voltage balancing means. The apparatus comprises measurement means for determining first voltages across the terminals of each of the modules, calculation means for measuring a second voltage across the terminals of the battery and for determining a mean voltage per module representative of the second voltage divided by the number of modules, and processor means for comparing each measured first voltage with the mean voltage per module and for delivering to the balancing means signals representative of the result of the comparison whenever the first voltage of a module is greater than the mean voltage, such that the balancing means reduce the voltage across the terminals of the module.

An atmospheric CO2 capture system includes a compartment housing a solid CO2 sorbent, an exchange fluid including a chemical component with selectivity towards CO2, and an electrochemical cell or mineralization reactor in fluid communication with the compartment, the system having a cycle including a first state of sorbing CO2 from incoming air onto the solid CO2 sorbent until a saturation point is reached; a second state of regenerating the sorbent by flooding the compartment with the exchange fluid to detach CO2 from the saturated sorbent and bind the detached CO2 to the chemical component; and a third state of regenerating the chemical component and utilizing the CO2 in the electrochemical cell or mineralization reactor.

An atmospheric CO2 capture system includes a compartment housing a solid CO2 sorbent, an exchange fluid including a chemical component with selectivity towards CO2, and an electrochemical cell or mineralization reactor in fluid communication with the compartment, the system having a cycle including a first state of sorbing CO2 from incoming air onto the solid CO2 sorbent until a saturation point is reached; a second state of regenerating the sorbent by flooding the compartment with the exchange fluid to detach CO2 from the saturated sorbent and bind the detached CO2 to the chemical component; and a third state of regenerating the chemical component and utilizing the CO2 in the electrochemical cell or mineralization reactor.

An exchange fluid having one or more amino acid for removing carbon dioxide from a solid sorbent and systems containing the same are disclosed. The exchange fluid may further include a neutralizing base for neutralizing the amino acid. The system may further employ an electrochemical cell to regenerate the exchange fluid by removing carbon dioxide from the exchange fluid without employing degrading temperatures and pressures.

A flow cell battery that includes at least one electrochemical cell. The electrochemical cell includes: an ion exchange membrane; a 1 mm to 4 mm thick anode; an anode current collector; a first bipolar plate disposed between the anode and the anode current collector; a first flow frame that defines first flow channels; a first tank including an anolyte that includes V4+ and V5+; a first pump to flow the anolyte from the first tank into the first flow channels; a 1 mm to 4 mm thick cathode; a cathode current collector; a second bipolar plate disposed between the cathode and the cathode current collector; a second flow frame that defines second flow channels; a second tank including a catholyte that includes V2+ and V3+; and a second pump to flow the catholyte from the second tank into the second flow channels.

The invention relates to a method for manufacturing a bipolar plate (10, 51) for an electrochemical cell unit (53) for converting electrochemical energy into electrical energy as a fuel cell unit (1) and / or for converting electrical energy into electrochemical energy as an electrolytic cell unit (49) having stacked electrochemical cells (52), the method comprising the steps of: providing a first plate 64) and a second plate (65), stacking the first plate (64) and the second plate (65) on top of one another such that inner surfaces (66) of the first and second plate (64, 65) lie on top of one another, applying contact forces to the first and second plates (64, 65) by means of negative pressure in a negative pressure chamber (104) relative to an ambient pressure so that, as a result of the contact forces applied by the ambient pressure, the inner surfaces (66) of the first and second plate (64, 65) lie on top of one another with an additional compression force in a contact region (68) due to the applied contact forces, producing at least one welded joint (69) between the first and second plate (64, 65) by means of a laser beam (74), forming connection channels (89) for process fluids in the first and / or second plate (64, 65), the channels opening into fluid openings (41) in the bipolar plates (10), 51) and into channels (12, 13, 14) for process fluids in the bipolar plates (10, 51), forming connection openings (93) in the first and / or second plate (64, 65) which connect the connection channels (89) to the channels (12, 13, 14) for process fluids in the bipolar plates (10, 51), the connection openings (93) being formed in the first and / or second plate (64, 65) by means of a laser beam (74).

Described herein is a catalyst comprising a nitrogen-doped carbon matrix, iron atoms, iron carbide particles, and carbon nanotubes, wherein the carbon nanotubes are dispersed and bonded to the nitrogen-doped carbon matrix, the iron atoms, and the iron carbide particles are dispersed and bonded to the nitrogen-doped carbon matrix and / or the carbon nanotubes. The catalyst may be used to coat an electrode for use in an electrochemical cell and electrolysis.

Described herein are electrochemically active-material structures comprising silicon and one or more inert elements, such that these inert elements are chemically and / or atomically dispersed. Also described are negative battery electrodes and lithium-ion electrochemical cells comprising such electrochemically active-material structures as well as methods of fabricating such structures, electrodes, and lithium-ion electrochemical cells. Some examples of atomically-dispersed inert elements include, but are not limited to, hydrogen (H), carbon (C), nitrogen (N), and chlorine (Cl). Unlike silicon, inert elements do not interact with lithium at an operating voltage of the negative battery electrode and therefore do not contribute to the overall cell capacity. At the same time, these inert elements help to mitigate silicon swelling by operating as a mechanical buffer, support structure, and / or additional conductive pathways. Such electrochemically active-material structures can be formed by reacting (chemically or electrochemically) one or more precursors that include silicon and corresponding inert elements.

Electrochemical cell and battery management systems comprise at least one battery comprising two or more strings of cells, each string of cells comprising two or more cells. The system includes a multiplexing switch apparatus connected to each string of cells and a controller. the controller is used to control various aspects of the charge and / or discharge of the electrochemical cell and / or battery.

The invention comprises an electrochemical cell stack unit (10) consisting of electrochemical cells, which can be used, for example, as a fuel cell unit for electrochemically generating electrical energy from hydrogen and / or as an electrolysis cell unit for generating hydrogen and oxygen from electrical energy.

The invention relates to an electrochemical element comprising: -a negative electrode comprising an active material; -a 2024 / 022807 positive electrode comprising an active material comprising a lithium manganese iron phosphate; -a gel electrolyte comprising a matrix which is a polymer obtained by crosslinking a monomer comprising at least two acrylate groups, whereby a liquid mixture comprising at least one solvent, at least one lithium salt and a free-radical polymerisation thermal initiator is incorporated therein.

Means for maintaining temperatures of lithium-containing electrochemical cells, inside electronic devices, and within containers within the desired temperature range without requiring the use of cooling liquids. Temperature is maintained through the use of coatings and at least one fan. The coating features at least 30% particles consisting of encapsulated solid substances that change phase at temperatures between 25 and 45 degrees Celsius. By means of the present invention, thermal management of lithium-containing electrochemical cells, within enclosures, inside structures and inside containers can be provided with recyclable coatings.

An interconnect for electrically connecting cells of an electrochemical cell stack is disclosed. The interconnector comprises a first side and a second side; the first side is adapted to face a cell layer comprising an electrochemically active cell region, and a portion of the first side is provided with an electrically insulating layer.

An electrochemical cell includes a housing, a positive electrode substrate disposed within a first electrode chamber of the housing, a negative electrode substrate disposed within a second electrode chamber of the housing, and a separator may be disposed within the housing between the first electrode chamber and the second electrode chamber. A method further includes pumping a manufacturing electrolyte through the positive electrode portion around the positive electrode substrate. The method further includes applying a first electrical signal to the positive electrode substrate so as to electrochemically fabricate one or both of an active material the negative electrode substrate to form a negative electrode and / or an active material on the positive electrode substrate, thereby forming a positive electrode.

A fuel electrode and systems containing the electrode are disclosed. A fuel electrode for use in a solid oxide electrochemical apparatus includes an electron conductor and an oxygen ion conductor. The electron conductor includes Nickel (Ni), Copper (Cu), and Magnesium oxide (MgO). The oxygen ion conductor includes doped Ceria. The fuel electrode includes a cermet current collector that also includes Nickel (Ni), Copper (Cu), Magnesium oxide (MgO), and doped ceria. The current collector also includes metal that is less prone to oxidization, such as certain precious metals. A solid oxide electrochemical cell includes the fuel electrode, an oxygen electrode, and a power supply in operable communication with both electrodes. A method of operating the solid oxide electrochemical cell as either a solid oxide electrolysis cell or a solid oxide fuel cell includes reducing the fuel electrode, if it becomes oxidized, without having to dismantle or replace the fuel electrode.

Circuitry for a resistance of an electrochemical cell comprising at least one first electrode and a second electrode, the circuitry comprising: drive circuitry configured to apply a stimulus to the at least one first electrode of the electrochemical cell; sense circuitry configured to measure a response of the electrochemical cell to the stimulus, the response comprising a faradaic component and a non-faradaic component; and processing circuitry configured to: sample the response at a sample time, the sample time selected to maximise a ratio of the non-faradaic component to the faradaic component; and determine the resistance of the electrochemical cell based on the response at the sample time.

The invention relates to an electrochemical cell (1), in particular an electrochemical cell (1) for binding carbon dioxide (CO2), having a layered structure with a first electrode (2) and a second electrode (3), wherein the first electrode (2) forms a cathode and has a surface (4) that can be brought into contact with a gas or gas mixture, and wherein the second electrode (3) forms an anode for releasing electrons. According to the invention, at least the first electrode (2) has, for the formation of a varying height profile, selectively introduced depressions (6) and / or selectively shaped protrusions (5) in the region of at least one surface, preferably in the region of the surface (4) that can be brought into contact with the gas or gas mixture. Furthermore, the invention relates to a method for producing an electrode (2, 3) for an electrochemical cell (1).

Circuitry for determining an impedance of an electrochemical cell comprising at least one first electrode and a second electrode, the circuitry comprising: drive circuitry configured to apply a stimulus to the electrochemical cell, the stimulus having a stimulation frequency and a stimulation amplitude; and measurement circuitry configured to: sample an output of the electrochemical cell at a sampling frequency to generate an output signal; determine an output amplitude of output signal at one or more alias frequencies, the one or more alias frequency based on the stimulation frequency and the sampling frequency; and determine the impedance of the cell at the stimulation frequency based on the output amplitude at the one or more alias frequencies and the stimulation amplitude; and control circuitry configured to: control the sampling frequency and the stimulation frequency such that a Nyquist rate of the sampling frequency is greater than stimulation frequency.

The invention relates to a fluid supply device for an electrochemical system, comprising at least one housing (14a; 14b; 14b; 14c, 14c; 14 d; 14e, 14e; 14f, 14f; 14 g; the time is 14 hours; 14i) for introducing a fluid, in particular air, into the housing (14a; 14b; 14b; 14c, 14c; 14 d; 14e, 14e; 14f, 14f; 14 g; the time is 14 hours; 16i) in the fluid inlet (14a; 16b, 16b; 16c, 16c; 16d, 16d; 16e, 16e; 16f, 16f; 16 g; the time is 16 hours; 16i) arranged in the housing (14a; 14b; 14b; 14c, 14c; 14 d; 14e, 14e; 14f, 14f; 14 g; the time is 14 hours; 14i) for supplying power to an electrochemical cell (20a; 20b; 20b; 20c, 20c; 20d, 20d; 20e, 20e; 20f, 20f; 20 g; 20 hours; 18i) for supplying fluid to a process fluid unit (18a; 18b, 18b; 18c, 18c; 18 d; 18e, 18e; 18f, 18f; 18 g; the time is 18 hours; it is proposed that the fluid supply device comprises a housing (14a; 18b) arranged in the housing (14a; 14b; 14b; 14c, 14c; 14 d; 14e, 14e; 14f, 14f; 14 g; the time is 14 hours; 14i) of the electronic cooling unit (22a; 22b; 22c; 22c; 22 d; 22e; 22e; 22f, 22f; 22 g; the time is 22 hours; 22i) for conducting a fluid on an electronic unit (24a; 24b) of the electrochemical system by means of a fluid; 24b, 24b; 24c, 24c; 24 d; 24 d; 24e, 24e; 24f, 24f; 24 g; the time is 24 hours; 24i) of the heat exchanger (24).

The invention relates to a battery (10) comprising a casing (20) housing electrochemical cells and a cell management system (42). According to the invention, the battery comprises, within the casing (20): - at least one heating layer (60) incorporating an electrical track adapted to be supplied with current by the electrochemical cells so as to heat said electrochemical cells by Joule heating, and - a transistor (80) controlled by the management system, this management system being programmed to modulate the electrical power received by said at least one heating layer in pulse width. Figure for the abstract: Fig. 1

The utility model relates to the technical field of battery cell production, in particular to battery cell heat-conducting gel filling equipment which comprises an equipment base, the top end of the equipment base is fixedly connected with a supporting frame, the top end of the supporting frame is fixedly connected with a stirring barrel, and the top end of the stirring barrel is fixedly provided with a driving motor through an arranged motor support. An output shaft is arranged at the bottom end of the driving motor, a stirring shaft is installed on the output shaft through an arranged coupler, gel stored in the stirring barrel can be stirred through the stirring barrel installed at the top end of the supporting frame, the driving motor, the stirring shaft and a stirring rod, and the situation that the use quality of the gel is affected after the gel is placed for a long time is prevented; and meanwhile, through the designed discharging mechanism, discharging can be ingeniously carried out, a conventional plug for sealing is omitted, the situation that gel drips on the skin of a person when the plug is opened is avoided, use is convenient, the structure is ingenious, and high practicability is achieved.

This technology provides a flow path that allows the electrolyte to be circulated according to its state. [Solution] The carbon dioxide concentrator comprises an absorption unit that absorbs carbon dioxide into an electrolyte, an electrochemical cell that generates carbon dioxide from the electrolyte, and a passage for flowing the electrolyte. The electrochemical cell comprises an anode, a cathode, an electrolyte membrane provided between the anode and the cathode, a first liquid chamber provided between the anode and the electrolyte membrane and supplied with the electrolyte, and a second liquid chamber provided between the electrolyte membrane and the cathode and supplied with the electrolyte. The passage includes a first passage that sends the electrolyte discharged from the second liquid chamber to the absorption unit and a second passage that returns it to the second liquid chamber, and the flow path of the electrolyte can be switched between the first passage and the second passage.

A stack (1), particularly for gas separation, comprising at least two electrochemical cells (2) is proposed. Each electrochemical cell (2) has several layers (3), in particular an anode (4), a cathode (5), and a separator (6) separating the anode (4) from the cathode (5). According to the invention, two electrochemical cells (2) each form a cell pair (7), the cells (2) of which are oriented such that either the cathodes (5) or the anodes (4) face each other, wherein a bipolar plate (8) is arranged between two cathodes (5) of a cell pair (7) or between the cathodes (5) of two stacked cell pairs (7), and a gas or gas mixture can be supplied via the two cathodes (5).

The present invention relates to an electrochemical cell comprising an anode, a polymer electrolyte and an NMC type cathode active material. The polymer electrolyte comprises an electrolyte composition, preferably comprising a deep eutectic solvent (DES), and a polymer network having a polyacrylamide backbone.

An encapsulated electrode for an electrochemical cell and a method for producing an encapsulated electrode. The encapsulated electrode structure has a first solid-state electrolyte composite (SSE) that has a top surface, a bottom surface, and a peripheral surface. Another layer of the encapsulated electrode structure is the electrode that has a top surface, a bottom surface, and a peripheral surface. Yet another layer of the encapsulated electrode structure is a second SSE that has a top surface, a bottom surface, and a peripheral surface. The first SSE is arranged so as to be attached to the electrode, wherein the bottom surface of the first SSE is attached to the top surface of the electrode. The bottom surface of the electrode is attached to the top surface of the second SSE. Pressure is applied to this stack so that the SSEs deform and encapsulate the electrode.

The invention relates to a method of operating an electrochemical cell, the method comprising determining a cell voltage, comparing the cell voltage with a minimum cell voltage corresponding to an end-of-life state of the cell, wherein the minimum cell voltage is updated over the lifetime of the cell depending on an area specific resistance of the cell. The invention also relates to a control system for controlling operation of an electrochemical cell, to an electrochemical cell system, and to computer- implemented methods of determining an end-of-life state of an electrochemical cell.

A small s-block-metal transition-metal oxide particle is described, having a highly spherical morphology. A material comprising a plurality of the particles is also described. The material is useful as an electrode material, in particular as a cathode material within an electrochemical cell or battery. A method of manufacturing the particle is also described.

A water-bearing electrical apparatus having a water absorption element and an electrochemical cell which has a cathode arranged in a cathode space and an anode arranged in an anode space, which are spatially separated, wherein the electrochemical cell is designed to generate an alkaline partial solution in the cathode space and an acidic partial solution in the anode space when it contains a conductivity transmitter-containing medium and the DC voltage is applied to the anode and the cathode, and to heat a fluid located in the cathode and anode spaces when the AC voltage is applied to the anode and the cathode. A method includes generating an alkaline partial solution in the cathode space and an acidic partial solution in the anode space while applying DC voltage, applying AC voltage to heat fluid in the electrochemical cell, and conveying the alkaline partial solution into the water absorption element.