Abstract: The present invention relates to a method for determining the lifetime of an electrochemical element of a battery in real time as a function of a determined application, applicable in the field of primary type batteries. The method comprises: —a step (1) of measuring at least one intensity value (I) of the current provided by the electrochemical element and of measuring at least one temperature value (T) of the electrochemical element in the determined application; —a step (4) of computing total lifetime allowing the availability time of the electrochemical element to be computed on the basis of a determined initial time, as a function of the one or more current intensity value(s) (I) and of the one or more temperature values (T) measured during the measuring step (1), as a function of a determined value of the capacity of the electrochemical element, of the cut-off voltage of the determined application, and of the background current of the determined application.

Abstract: This container includes a structure comprising a floor support with two longitudinal stringers and crossmembers connecting same, each longitudinal member having an upper face, a floor having an upper support surface for supporting said modules and extending up to the lateral edges facing the longitudinal members, peripheral walls, at least one of which defines a door (92A) movable between a closed position in which a lower edge is facing said upper face and an open position, and a roof above the peripheral walls. Along the lower edge of the door in the closed position, the lateral edge of said upper surface extends to a height above that of said upper face, the floor support defining a step between said face and upper surface, delimiting a water-receiving volume.

Abstract: 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.

Abstract: The container includes a structure for receiving the battery modules, comprising upper corner pieces mounted on the upper corners of peripheral walls of the structure, the structure also including a roof extending between the upper corners. The roof includes a water evacuation region, comprising at least two inclined faces inclined between a lower edge and at least one upper point common to the two inclined faces, in order to allow a flow of water received on each of the inclined faces to flow toward their lower edge thereof. The water evacuation region is located in or below a plane (P) defined by the upper surfaces of the upper corner pieces.

Abstract: A method for treating a surface of a strip or film, the strip or film being made of lithium or a lithium-based alloy, the method comprising a step of radiating at least one portion of the surface of the strip or film with a laser beam, the radiating step being carried out in a controlled atmosphere, the laser beam radiating the entire area of the at least one portion of the surface of the strip or film.

Abstract: An electrolyte composition comprising: a) a solvent comprising: a mixture of at least two saturated cyclic carbonates, at least one of these saturated cyclic carbonates being fluorinated, at least one ether, said at least one saturated cyclic carbonate representing at most 1.5% by weight of the solvent, said at least one ether representing at least 40% by weight of the solvent; b) at least one lithium salt other than lithium difluorophosphate; c) lithium difluorophosphate in an amount representing from 0.1 to 1% by weight relative to the sum of weight of the solvent and weight of said at least one lithium salt. The use of this composition in an electrochemical cell comprising a lithium anode allows increased performance of the cell when it is discharged under a strong current at low temperature, and limited self-discharging when in operation at ambient temperature.

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: A battery including at least two electrochemical cells of parallelepiped format; a first layer of a refractory material able to withstand a temperature up to 1200° C. placed in contact with the entirety of a first face which is one of the faces of largest area of one of the electrochemical cells, the first layer including a central region having as its center the center of the first layer and having an area representing 30 to 60% of the area of said first face; and a rigid spacer having a hardness greater than or equal to 90 Shore A according to standard ASTM D 2240-15, placed between said first layer and the second electrochemical cell (2-2), the rigid spacer being located outside of the central region of said first layer.

Abstract: An electrochemical assembly includes a first stack of electrochemical elements provided with a first electrical connection tab with a first polarity. The first stack of electrochemical elements extends along a stacking plane. A first common connection element is adapted to electrically connect the first electrical connection tab to an electrical connection terminal with the first polarity.

Abstract: Disclosed is an electrolyte composition comprising: a) a solvent comprising: i) either a mixture of 1,1,1,3,3,3-hexaflu-oro-2-methoxypropane (HFMP) or of 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), of monofluoroethylene carbonate (F1EC) and of 2,2,2-trifluoroethyl methyl carbonate (F3EMC), ii) or a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) or of 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), of monofluoroethylene carbonate (F1EC) and of 2,2,2-trifluoroethyl acetate (F3EA), b) at least one lithium salt, the cation of which is the cation of an alkali metal.

Abstract: An electrochemical cell of the lithium/sulfur type comprising: a) a cathode comprising: i) microporous carbon in the form of particles, the particle size distribution being characterized by a median volume diameter Dv50 of the particles which is greater than or equal to 1 ?m and less than or equal to 5 ?m; ii) sulfur having an oxidation degree in the range of 0 to ?2 in the pores of the microporous carbon; b) an electrolyte comprising a solvent, said solvent comprising at least one fluorinated carbonate; c) an anode composed of lithium metal or of a lithium metal alloy. The electrochemical cell exhibits an improved specific gravimetry and an improved life cycle.

Abstract: The present invention relates to a battery comprising a casing, the casing defining an interior space, the battery comprising a set of internal elements, the internal elements being inserted into the interior space, the set of internal elements comprising: at least one electrochemical element, a system for managing the at least one electrochemical element, and a circuit for maintaining the at least one electrochemical element, the maintaining circuit being able to obtain a measurement of a parameter relative to the state of health of the at least one electrochemical element.

Abstract: A connecting part for assembling two battery modules, said connecting part including: a first portion able to be inserted into a recess of a first retaining element of a first plurality of electrochemical cells forming part of a first battery module and a second portion able to be inserted into a recess of a second retaining element of a second plurality of electrochemical cells forming part of a second battery module, the first portion and the second portion having different dimensions, such that the first portion is not suitable for being inserted into the recess of the second retaining element and/or the second portion is not suitable for being inserted into the recess of the first retaining element, a device for preventing the removal of the connecting part after its insertion into a recess of one of the two retaining elements.

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.