314 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.

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.

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.

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 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 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.

Electrochemical cells and methods of providing over-discharge protection of the same are disclosed. An electrochemical cell may include a cathode, an anode, a separator, and an electrolyte. The cathode may include a cathode current collector and a cathode active material disposed on at least a portion of the cathode current collector. The anode may include an anode current collector and an anode active material disposed on at least a portion of the anode current collector. The anode current collector may include an anode conductive material and a lithophilic metal layer disposed on the anode conductive material. The lithophilic metal layer may define an outer surface of the anode current collector. The separator may be arranged between the anode and the cathode to prevent direct contact between the anode and the cathode. The electrolyte may transport ions between the cathode and the anode.

Electric or hybrid vehicle traction battery forming a flat casing comprising a lower tray (2) closed by a lid, inside crossbeams (8) each separating two adjacent zones receiving electrochemical cell modules (6), at the level of these crossbeams (8) free spaces connecting two adjacent zones, and comprising a foam strip fitted in each free space, which constitutes, at the level of these crossbeams (8), fire barriers between the two adjacent zones. Figure 4

The invention relates to a processing device (10) for processing a substrate (12) for an electrochemical cell, comprising a mounting (14) for the substrate (12) and a processing unit (16) for processing the substrate (12), and to a method for processing a substrate (12) for an electrochemical cell, in particular by means of a processing device (10), wherein the substrate (12) is held by means of a mounting (14) and processed by means of a processing unit (16). The invention further relates to a substrate (12) for an electrochemical cell, the substrate having been processed by means of such a processing device (10) and / or using such a method. According to the invention, the substrate (12) is held by means of an at least partially cylindrical mounting (14), in particular a substantially cylindrical mounting.

The present invention relates to an electrochemical cell (1), in particular an electrolytic cell. The electrochemical cell (1) comprises: a catalyst-coated membrane (100); diffusion layers (5, 6) arranged on both sides of the membrane; distributor plates (7, 8) arranged on the diffusion layers (5, 6); and a sealing frame (40). The sealing frame (40) is arranged so as to surround the catalyst-coated membrane (100) and the diffusion layers (5, 6). The sealing frame (40) interacts at its end faces (40a, 40b) with respective distributor plates (7, 8). A feather key (50) is formed on the sealing frame (40) and interacts with a recess (70) formed in one of the distributor plates (7, 8).

The invention relates to an electrochemical energy storage device (100) having at least one electrochemical cell (10) which has an electrolyte (13) and at least two electron-conducting materials in the form of electrodes (11, 12) which are connected to the electrolyte (13), wherein an external voltage can be applied between the electrodes (11, 12). In order to provide an increased amount of charge in the form of electrons in the electrochemical cell (10), according to the invention at least one electrode (11, 12) is replaced by at least two partial electrodes (66, 67), which are spatially separated from each other and between which an electron line (71) runs.

In the claimed method, a metal foil forming a first electrical current conductor is provided with openings, which are distributed uniformly on a surface of the metal foil and are arranged with spacings. The metal foil is subsequently brought into contact with a solid electrolyte, and the metal foil perforated in this way is then provided with a polymer coating, with which the free cross-sectional areas of the openings are filled. A thin, dense solid electrolyte layer is subsequently formed, and a layer forming the cathode is then formed on the opposite surface of the solid electrolyte in relation to the first current conductor, or a cathode is integrally bonded to said surface. The cathode is placed in electrically conductive contact with a further metal foil, which forms a second electrical conductor, on the oppositely arranged surface and is ionically conductively infiltrated with a liquid electrolyte, wherein an alkali metal anode is formed on the solid electrolyte in the region of the openings in the metal foil during charging of said electrochemical cells.

A system for controlling battery temperature may comprise a battery module 21 and a charging device 31. The battery module may comprise a battery comprising electrochemical cells 23 and a first heat exchanger 22 with an endpiece 25 connected to one or more plates 24 where each plate is in thermal communication with a face of the cells. The charging device may comprise a second heat exchanger 32 with a thermal body 33 in thermal communication with a heat source / heat sink 36. The charging device may be connected to the battery module so that the end piece of the module is in thermal communication with the thermal body of the charging device. A method of use may comprise transferring thermal energy between the endpiece of the battery module and the thermal body of the battery to control the temperature of the battery. [Fig. 2]

The present invention relates to an electrode composition comprising PTFE and a crosslinkable fluororesin, a method for preparing the same, and its use for the manufacture of electrochemical cell components.

The invention relates to a method for determining a failure probability, in particular at least one state of increased failure probability, of at least one cell system (10a) with at least one electrochemical cell (12a), wherein in at least one determination step (14a; 14b; 14c; 14d) at least one degradation parameter of the at least one electrochemical cell (12a), which in particular allows conclusions to be drawn about a degradation state of the at least one electrochemical cell (12a) in a defined state, is determined by means of a virtual sensor unit (16a). It is proposed that in one determination step (14a; 14b; 14c; 14d) a failure probability of the at least one electrochemical cell (12a) is determined as a function of the degradation parameter.

An electrochemical cell having a cathode comprising a fluorinated carbon nanotube (F-CNT), an anode and a solid electrolyte; wherein the solid electrolyte comprises an electrolyte component comprising i. 5 to 50 wt. % of an alkali metal-containing electrolyte salt, and ii. 50 to 95 wt. % of a polymer. Embodiments do not require a carbon-based conductive-adjuvant in the cathode. The thickness of the solid electrolyte may be least 5 microns. A container comprising cell may have space to allow for thermal expansion thereof. They may be used at elevated temperatures greater than 65° C. or more, such as in a subterranean well.

A porous transport layer (PTL) shearing device may include a compression block having a bottom face profile including a shearing edge, and a shearing base die having a top face profile, the compression block and the base die are cooperatively configured to deform and shear a PTL such that a perimeter edge thickness of the PTL is less than an uncompressed center portion thickness of the PTL.

A porous transport layer (PTL) may include a porous structure having a first region having a first porosity and a second region having a second porosity less than the first porosity, the first region is configured to allow conduction of electrons within a catalyst layer of the electrochemical cell, to channel water and gases in the catalyst layer, the porous structure having a top face in contact with a flow field of the electrochemical cell and a first and second bottom face, the first bottom face being a bottom face of the first region and the second bottom face being a bottom face of the second region offset the bottom face of the first region in a thickness direction of the porous structure, and the second region configured to provide mechanical stability to a membrane portion of the electrochemical cell adjacent to the first bottom face.

The present invention relates to an electrochemical cell system (100) with a plurality of electrochemical cell stack modules. According to the invention, an air supply section (30) in a section upstream of decentralized heating devices (44) comprises a first air supply path (31) and a second air supply path (32) for selectively supplying the supply air (ZL) to the cell stack modules (10). A central heating device (40) is arranged in the first air supply path (31) for heating the supply air (ZL) that is supplied to the cell stack modules (10) via the first air supply path (31), while the second air supply path (32) is free of a heating device (40).

A system and method are disclosed for increasing the production yield of CO2 conversion products in an electrochemical reactor assisted by an osmotically driven dewatering system. The system comprises an electrochemical cell including a cathode chamber, an anode chamber, and a central desalination chamber. The cathode chamber includes a cathode active material, and the anode chamber includes an anode active material. The central desalination chamber comprises a plurality of desalination cells, each featuring alternating anion exchange membranes (AEMs) and cation exchange membranes (CEMs). A forward osmosis membrane (FOM) is integrated at the interface between the cathode chamber and the adjacent desalination cell, replacing the conventional terminal CEM. This configuration establishes an osmotic gradient that drives water flux from the cathode chamber into the desalination chamber, thereby concentrating the CO2 conversion product (e.g., formate) in situ and enhancing Faradaic efficiency without requiring post-treatment.