Abstract: The present invention relates to a method for charging an electrochemical cell of a rechargeable battery with charging pulse control (PL), the pulses (PL) being driven in voltage control mode in the form of voltage steps (Pt) of variable amplitude. According to the invention, the method consists in calculating the value (Ut+1) of each voltage step (Pt+1) with respect to the value (Ut) of the preceding voltage step (Pt) and according to a progression variable representative of the variation in the internal resistance of the cell (d(R)/dt), for a period ending on the preceding step (Pt), with respect to a predetermined tolerated variation threshold (?), where Var=d(R)/dt??. The method applies to high-voltage electric battery charging protocols for electromobility or stationary applications, or portable device batteries, for example.

Abstract: The electrode comprises: a support defining a first lateral edge and an upper edge extending from the first lateral edge; a layer containing an active substance covering the support; and an electrical-connection tab devoid of the layer containing the active substance, the tab projecting from the upper edge in the vicinity of the first lateral edge; The electrode defines, in the vicinity of a second lateral edge of the support, a cutout extending, set back from the upper edge, in the continuation of the upper edge, towards the second lateral edge.

Abstract: The invention concerns a method for estimating the state of health (SOH) of an electrochemical element, comprising: initiating a charging or discharging operation of the electrochemical element; measuring values representing deformations of the electrochemical element while the charging or discharging operation is being performed, the deformation values measured forming a deformations image signal according to the quantity of electricity passing through the electrochemical element over time; comparing the deformations image signal and a reference image signal, one or more differences obtained by the comparison characterising an estimation of the ageing of the electrochemical element.

Abstract: A connection element for electrically, and mechanically connecting in a direction of connection, a first terminal of a first accumulator to a second terminal of a second accumulator, the first terminal and the second terminal protruding in a thickness direction, the connection element comprising a metal body having a first wing suitable for being welded onto the first terminal, a central part, and a second wing suitable for being welded onto the second terminal, the central part having a U-shape or a V-shape, the first wing and the second wing extending along the legs of the “U” or the “V”, respectively, the connection element being less prominent than, or at the same level in the thickness direction as at least one of the first terminal and of the second terminal.

Abstract: The present invention relates to an electrode covered, on all or part of its surface thereof, with a coating layer made of an electronically insulating and ionically conductive as well as the method for preparing said electrode. The present invention also relates to the protection of sulfur electrolytes in order to improve their stability with regard to moisture, in particular by means of a layer comprising an ionically conductive inorganic material comprising a halogen-type anion.

Abstract: Such electrochemical unit comprises a first stack of electrochemical cells provided with a first electrical connection tab, a second stack of electrochemical cells provided with a second electrical connection tab, a common connection element, electrically connecting the first electrical connection tab and the second electrical connection tab and suitable for electrically connecting the first electrical connection tab and the second electrical connection tab to a connection terminal with a first polarity. The common connection element is connected by a material bond to the first electrical connection tab and to the second electrical connection tab. Application to electrochemical batteries.

Abstract: The use of a blend of a lithium nickel oxide and a lithium manganese iron phosphate as an active material composition in the cathode of a lithium secondary electrochemical cell for automotive applications, such as hybrid and electric vehicles. This blend allows decreasing the porosity of a lithium manganese iron phosphate-based cathode. It also allows improving the detectability of a gas release in the cell in case of an abnormal operation of the cell. It allows lowering the cell impedance at a low state of charge, typically less than 30%, and reducing the impedance increase of the cell during the cell lifespan.

Abstract: The present invention relates to an electrochemical assembly, of the type comprising a first stack of electrochemical elements provided with a first electrical connection tab with a first polarity, the first stack of electrochemical elements extending along a stacking plane, a first common connection element adapted to electrically connect the first electrical connection tab to an electrical connection terminal with the first polarity,

Abstract: A method for determining an electrolyte level in electrochemical cells of a battery or of a plurality of batteries, said method comprising the steps of: a) providing one battery or a plurality of batteries, each battery comprising a container having at least one wall; each battery consisting of one or several electrochemical cells; b) recording an image of the infrared radiations emitted by the wall and by the electrolyte through the wall of the battery or in case of a plurality of batteries recording an image of the infrared radiations emitted by the walls and by the electrolyte through the walls of the plurality of batteries; c) processing the image to locate in each electrochemical cell a boundary between two zones exhibiting a temperature difference thereby determining the electrolyte level in each electrochemical cell.

Abstract: This electrochemical cell for a battery, comprises a first electrode of a first polarity, a first terminal of the first polarity, a second electrode of a second polarity, a second terminal of the second polarity, an envelope comprising two walls. The envelope comprises two first edges and two second edges forming an enveloping quadrilateral. The first terminal of the first polarity and/or the second terminal of the second polarity is disposed entirely within the enveloping quadrilateral. The two walls each comprise a metal base foil having a thickness of between 20 ?m and 150 ?m. The first terminal of the first polarity is arranged in a first corner of the enveloping quadrilateral and the second terminal of the second polarity is arranged in a second corner of the enveloping quadrilateral, different from the first corner.

Abstract: The invention relates to a compound of the formula Li7-xPS6-xXx-z(BH4)z, in which x is selected from the group comprising Cl, Br, I, F and CN, 0?x?2, 0?z?0.50. This compound can be used as a solid electrolyte of a lithium-ion electrochemical element.

Abstract: This electrochemical element for a battery, comprising a first electrode of a first polarity, a first terminal of the first polarity, a second electrode of a second polarity, a second terminal of the second polarity, and a casing comprising a first wall and a second wall. The first wall and the second wall each comprise a base body of metal and an electrically insulating layer. The electrically insulating layer comprises either a plastic coating or a layer resulting from a surface treatment. Each of the base bodies comprises a base body edge. The edges of the base bodies are joined by a weld bead to form the casing. At the location of the weld bead, the base bodies are free of the electrically insulating layer.

Abstract: The present application relates to an electrode comprising pillars of conductors covered with at least two layers for improving the deposition of lithium, and the electrochemical cells and batteries comprising same.

Abstract: The present invention relates to a current collector for a negative electrode, coated with at least one electronically conducting and ionically insulating layer, to the method for producing such a collector, and to batteries containing same.

Abstract: Provided is pouch battery including an electrode assembly, and a case in which the electrode assembly is sealed and housed; the electrode assembly including a stacked structure of a sheet cathode, a sheet separator, and a sheet anode; the sheet cathode including a positive electrode active material disposed on a current collector; the sheet anode is thin conductive sheet on which lithium metal reversibly deposits on a surface thereof during discharging; the sheet anode being made of a conductive material other than lithium and having a surface substantially free from lithium metal prior to charging the battery. The pouch battery design is flexible and lightweight and provides high power density, making it a suitable replacement for conventional lithium-ion primary batteries and thermal batteries in many applications. Power can be further increased by the application of external compression. Additives and formation conditions can be tailored for forming a solid-electrolyte interface (SEI).

Abstract: The present application relates to novel mixed compounds based on oxides and sulfides, and the use thereof as a solid electrolyte, with improved sulfide stability. The application further relates to electrochemical elements and lithium batteries containing such electrolytes.

Abstract: A vent assembly for a battery or a electrochemical cell may include a vent body configured to connect to a battery casing or a electrochemical cell body, a flame arrester and/or a pressure valve disposed in the vent body, a membrane disposed in the vent body between a vent opening of the battery or the electrochemical cell and the flame arrester and/or the pressure valve, and that is configured to shield the flame arrester and/or the pressure valve from electrolyte solution of the battery or the electrochemical cell, and a seal disposed between the vent body and the membrane. Also, a battery including a vent assembly.

Abstract: The invention relates to a method for determining the value of one or more parameters relating to the state of health of at least one accumulator of a battery that is intended to provide electrical energy to an external application. A first state-of-health parameter related to the resistance of at least one electrochemical element of the battery is determined according to the method comprising:—a step (1) of determining the value of the state of charge of the electrochemica 1 element, expressed as a percentage of a maximum state of charge; —a step (2) of verifying whether the determined value of the state of charge belongs to a sought range; —a step of repeating, as long as the result of the verification step (2) is not positive, the determination step (1) and then the verification step (2); —calculating the value of the first parameter as a function of at least the value of the state of charge determined during the last determination step (1).

Abstract: A sacrificial positive active material for a lithium-ion electrochemical element which is a compound of formula (Li2O)x (MnO2)y(MnO)z(MOa)t in which: x+y+z+t=1; 1?x?y?0; 0.97?x?0.6; y?0.45; x ?0.17; y?0; y+z>0; t?0; 1?a<3. M is selected from the group consisting of Fe, Co, Ni, B, Al, Ti, Si, V, Mo, Zr and a mixture thereof.

Abstract: The present invention relates to a battery comprising: -i) at least two electrochemical elements (d) connected to one another by a connection part (c), each electrochemical element comprising a container, -ii) a material arranged between said at least two electrochemical elements, and -iii) at least one disconnection device, said device comprising: a heat-activatable element (a) able to deform when its temperature reaches a threshold value, the heat-activatable element being arranged such that, when its temperature QI reaches said threshold value, it disconnects the connection part (c) from at least one electrochemical element (d) through its deformation, said heat-activatable element not contributing to the conduction of electric current when an electric current flows through said electro-chemical elements, said heat-activatable element being placed in contact with the connection part (c) and with a current output terminal.