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 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 electrochemical elements, said heat-activatable element being placed in contact with the connection part (c) and with a current output terminal.

Abstract: The invention relates to a device forming a DC voltage bus for a polyphase electrical system (M), comprising voltage legs (A1, A2, A3) each having a plurality of battery cell modules (C1, C2, C3), each module comprising a battery cell or a cluster of battery cells (c1), connected to a DC-to-AC converter (DCAC); said battery cell modules (C1, C2, C3) being connected together in series via the DC-to-AC converter (DCAC); said voltage legs (A1, A2, A3) each being connected to a specific phase leg (B1, B2, B3) for said polyphase electrical system (M), at least one phase leg (B1, B2, B3) having a branch (D1, D2, D3) connected to a rectifier module (R1). The invention also relates to a motor vehicle, a renewable energy generator and a method based on such a system.

Abstract: An electrolyte composition for a lithium-ion electrochemical element, comprising: at least one lithium tetrafluoride or hexafluoride salt, the salts of lithium bis(fluorosulfonyl)imide LiFSI, vinylene carbonate, ethylene sulfate, at least one organic solvent chosen from the group consisting of cyclic or linear carbonates, cyclic or linear esters, cyclic or linear ethers and a mixture thereof. The use of this composition in a lithium-ion electrochemical element increases the service life of the element, in particular under low and high temperature cycling conditions.

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 electrochemical 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: The invention relates to a battery cell comprising a bucket, a lid attached to the bucket, at least one first electrochemical bundle in the bucket, at least one first polarity collector. The first polarity collector is integral with the lid and defines at least one first welding surface located away from the bucket, to which the electrical connection tabs of the first electrodes of the first electrochemical bundle are welded. The cover comprises an upper part delimiting at least a first through opening located opposite the first welding surface in a direction of elevation. The battery cell further comprises a sealing device attached to the cover and designed to seal the first through opening.

Abstract: The invention relates to an electrochemical bundle comprising a plurality of stacks each including a first polarity electrode, a second polarity electrode, a first separator and a second separator. Each first polarity electrode comprises an electrical connection tab. The electrochemical bundle comprises a first metallic separator interposed between each pair of adjacent electrical connection tabs. The first separator is attached to at least one of said electrical connection tabs. The first separator extends, between each pair of adjacent electrical connection tabs, between a lower edge and an upper edge. The upper edges of the first separator are substantially flush with the upper edges of the electrical connection tabs.

Abstract: A lithium/sulfur electrochemical element (1) comprising: a cathode (2) comprising: i) carbon having a porous structure (5) comprising pores with a mean diameter less than or equal to 6 nm; ii) sulfur having a degree of oxidation between 0 and ?2 in the pores of the carbon; b) an electrolyte comprising: i) at least one organic solvent which is a carbonate; ii) one or more salts, at least one salt being lithium bis(fluorosulfonyl)imide; c) an anode (4) comprising lithium metal or a metallic alloy of lithium. Such an element provides increased safety of use because it limits the quantity of hydrogen sulfide that can be emitted in the event of an electrolyte leak or in the event of exposure of an electrode of the element to water.

Abstract: The present invention relates to a method for controlling a battery with integrated inverters comprising n basic cell modules (MEk) which supply a basic voltage Vcell and allow the application of a homogenous current to all the cells. More specifically, the method comprises a step of controlling the control signals (uik) from the basic modules (MEk) so as to provide the voltage waveform (VM1) on the basis of a selection of a group of q basic modules (MEk) according to a reference voltage setpoint Vref, where Vref=qVcell, determining a classification of the n basic modules, processing the classification of the plurality n according to a circular permutation of the positions of the basic modules (MEk) such that each basic module (MEk) of the plurality n is involved in producing the voltage waveform over a period that is the same for each module. The invention is applicable in the fields of electromobility and stationary energy storage.

Abstract: The present invention relates to sulfide solid electrolytes having improved conductivity, a process for the preparation thereof, and electrochemical elements and batteries containing same.

Abstract: The present application concerns solid polymer electrolytes (SPEs) comprising thermoplastic vulcanizates (TPVs) and alkali metal salts, their process of preparation and the electrochemical cells comprising such electrolytes.

Abstract: The present application relates to an insulating film obtained by dry processing, to a method for obtaining same and to the use thereof to coat electrode tabs, in particular positive electrode tabs for Li-ion batteries.

Abstract: An electrochemical cell including a container including an electrochemical spiral bundle including: a positive electrode including an active material selected from among SOCl2, SO2, SO2Cl; CFx where x?1.5; MnO2, FeS2, V2O5, I2, Bi2O3, Bi2Pb2O5, CuCl2, CuF2, CuO, Cu4O(PO4)2, CuS, FeS, MoO3, Ni3S2, AgCl, Ag2CrO4, SVO, MO6S8, and a mixture of a plurality thereof; a separator; and a negative electrode including an active material made of lithium metal or of a lithium-based alloy. The outer face of the spiral, facing the container, is formed by the positive electrode, and a strip of lithium or of a lithium-based alloy at least partially covers the inner face of the container. The strip pressed against the inner face of the container makes it possible to make use of an outer face of the positive electrode which forms the last turn of the spirally-wound electrode plate group.

Abstract: An electrochemical cell includes a container having a bottom and containing an assembly of parallelepipedal plates consisting of one or more positive plates including positive tabs and negative plates including negative tabs, separated by a separator; one or more covers closing an opening of the container; an electrical connection part of a given polarity connecting a tab of the same polarity to a current output terminal of the cell of the same polarity, fixed to a cover; an electrical connection part of opposite polarity connecting a tab of opposite polarity to a current output terminal of opposite polarity, which is fixed to, and electrically insulated from, the cover, the bottom of the container, or a second cover electrically insulated from the first cover; the connection parts each comprising a support plate having a projecting element for connecting a given polarity tab to the current output terminal of corresponding polarity.

Abstract: This electrochemical assembly comprises a first electrochemical stack, having first stack electrodes of a first polarity and first stack electrodes of a second polarity. The first stack electrodes of the first polarity comprise first terminal tabs of the first polarity and forming a first electric terminal tab stack. The electrochemical assembly comprises a second electrochemical stack, having second stack electrodes of the first polarity and second stack electrodes of the second polarity. The second stack electrodes of the first polarity comprise second terminal tabs of the first polarity and forming a second electric terminal tab stack. The electrochemical assembly comprises a first terminal comprising a terminal portion and a tab connection portion. The first electric terminal tab stack overlaps the second electric terminal tab stack and is electrically connected to the tab connection portion of the first terminal via the second electric terminal tab stack.

Abstract: The invention relates to a method for detecting the state of charge of an electrochemical element, the method comprising the steps of: obtaining the voltage, current, temperature and capacity of the electrochemical element, computing the state of charge of the electrochemical element using two techniques: a first technique giving the value of the first model applied to the aforementioned values and corrected by the correction function, the first model being a neural network, the correction function giving for each value of the state of charge the statistical estimation error of the first model; and a coulometric second technique, determining the most reliable technique depending on a reliability criterion of the corrected first model, and the value computed using the determined technique being the estimated value of the state of charge.

Abstract: Provided is a lithium-ion secondary batteries including lithium vanadium fluorophosphate (e.g., LiVPO4F and its derivatives) and/or a mix containing LVPF as a positive electrode active material and an electrolytic solution including tris(trimethylsilyl)phosphate (TTSP) to reduce cycle capacity loss.

Abstract: A battery including a housing, a plurality of battery cells in the housing, and a spring plate providing a biasing force against the plurality of battery cells. The spring plate is configured such that a tension of the spring plate may be adjusted from outside of the housing.

Abstract: The present application relates to fluoropolymer-based, solvent-free electrode formulations obtained by extrusion and/or comprising one or more co-binders including TPU, to electrodes containing the same and to corresponding electrochemical elements and storage cells.

Abstract: A multi-layer cathode coating for positive electrode of a rechargeable electrochemical cell (or secondary cell) (such as a lithium-ion secondary battery) and a secondary battery including a cathode having a multi-layer cathode coating. Multi-layer cathode coatings containing blends of one or more cathode active materials in certain weight ratios thereof.

Abstract: The present electrochemical element for a battery comprises a first electrode of a first polarity, a first connection member for the first polarity, a second electrode of a second polarity, a second connection member for the second polarity, and a casing comprising a first wall and a second wall. The casing comprises a first edge and a second edge which form an enveloping geometric shape having a corner. The first connection member and the second connection member are arranged completely within the enveloping geometric shape. The first connection member and the second connection member are arranged in a first corner of the enveloping geometric shape.