EP4248518A1 - Cellule électrochimique de type pouch pour un dispositif de stockage d'énergie - Google Patents
Cellule électrochimique de type pouch pour un dispositif de stockage d'énergieInfo
- Publication number
- EP4248518A1 EP4248518A1 EP21807132.2A EP21807132A EP4248518A1 EP 4248518 A1 EP4248518 A1 EP 4248518A1 EP 21807132 A EP21807132 A EP 21807132A EP 4248518 A1 EP4248518 A1 EP 4248518A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrochemical cell
- electrical terminal
- electrodes
- axis
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the wrapping step can comprise a sub-step of aligning at least one of the end portions of the strip with the periphery of the base of the at least one electrical terminal.
- Figure 1 is a schematic representation in section and top view of an embodiment of a pouch-type electrochemical cell according to the invention.
- FIG. 2 Figure 2 is a schematic representation in perspective of the electrochemical cell.
- Figure 3 is a front representation of the electrochemical cell.
- Figure 4 is a schematic representation of a section of a variant of the electrochemical cell.
- Figure 5 is a schematic representation of a section of a variant of the electrochemical cell.
- Figure 6 is a front view schematic representation of a spacer for an electrochemical cell.
- Figure 7 is a schematic representation of a top view section of an electrical energy storage device.
- Figure 9 is a schematic representation of a step in a process for manufacturing the electrochemical cell.
- Figure 10 is a schematic representation of another step in the manufacturing process of the electrochemical cell.
- Figure 11 is a schematic representation of a prior art electrochemical cell.
- the electrochemical cell 1 is able to store energy in chemical form and to restore it in the form of an electric current.
- the electrochemical cells can, for example, be of the “lithium-ion” type, also called “Li-ion”.
- the electrochemical cell 1 of the pouch type as illustrated in FIGS. 1 to 3 comprises a plurality of stacked electrodes 2, in particular at least one anode and one cathode spaced apart by an electrically insulating separation element, not shown, and a strip 3. Also, the electrochemical cell 1 comprises at least one electrical terminal 4.
- the orientation of the electrochemical cell will be defined according to a first axis X, a second axis Y, orthogonal to the first axis X, and a third axis Z, orthogonal to the first axis X and to the second axis Y.
- the axes X, Y and Z are in particular represented by a trihedron XYZ in the figures requiring it.
- the term “pouch” is understood to mean a sachet or pocket structure of the strip 3.
- the strip 3 can, by way of example, be of the composite and/or laminated type, that is to say it can comprise a plurality of layers, or integral sheets made of distinct materials.
- the strip 3 can comprise a metal sheet, for example made of aluminum or an aluminum-based alloy, and/or a plastic sheet, for example made, without limitation, of PET (polyethylene terephthalate), nylon, PP (polypropylene), PPa (acidified polypropylene).
- the electrochemical cell 1 can have a parallelepipedal or substantially parallelepipedal shape, in particular rectangular or square parallelepipedal, or even cubic.
- the electrochemical cell 1 shown has, in a non-limiting manner, a rectangular parallelepipedal shape.
- the cell 1 comprises two end sides 11, delimiting the electrochemical cell 1 along the first axis X, and a plurality of lateral sides 12, connecting the end sides 11 to one another.
- one of the end sides 11 is formed by the electrical terminal 4 and the electrochemical cell 1 comprises four lateral sides 12, formed by the strip 3.
- the strip 3 has a shape adapted to the formation by folding of a substantially parallelepipedal pocket or sachet, in particular rectangular or square parallelepipedic, or even cubic.
- the electrochemical cell 1 may comprise at least one electrically insulating separation element, not shown, interposed between each adjacent anode and cathode of the plurality of electrodes 2.
- Each electrode comprises a main portion 21, planar or substantially planar, and at least one tongue 22 extending into the housing 100 projecting from the main portion 21.
- the at least one tongue 22 extends towards the au at least one electrical terminal 4 and is configured to cooperate with it.
- the housing 100 contains, or is partially filled, a non-aqueous electrolyte impregnating the plurality of electrodes 2, in particular the pores of the plurality of electrodes, and the separation element(s).
- the electrolyte may, for example, consist of lithium salts (LiPF6, LiBF4, LiCIO4, LiTFSI, LiFSI, LiBOB) dissolved in an organic solvent such as dimethyl, ethylene or diethyl carbonate, propylene carbonate or acetonitrile.
- the electrical terminal 4 comprises a base 41 which can be made of an insulating material, such as plastic or ceramic, and an electrical connector 42, metallic.
- the base 41 can be made of an electrically insulating material.
- the base 41 can also be made of a thermally conductive material.
- the electrical connector 42 allows the connection of the plurality of electrodes 2 with an electrical circuit, not shown, of the cell 1 by cooperation with the at least one tongue 22 specific to each electrode.
- the electrical connector 42 extends at least partly along the first axis X, that is to say that the first axis X defines a direction of extension of at least part of the electrical connector 42.
- the axis X can be defined by the axis along which the electrical connector 42 extends towards the outside of the electrochemical cell 1 .
- the first dimension may correspond to a width, as shown, or, alternatively, to a height.
- the term “substantially equal” is understood to mean a first dimension 411 of the base 41 of the at least one electrical terminal 4 having a value of the order of the first dimension 211 of the stack of electrodes ⁇ 7%, in particular ⁇ 3%.
- the base 41 of the at least one electrical terminal 4 has a second dimension 412 substantially equal to or greater than a second dimension 212 of the stack of the plurality of electrodes 2.
- second dimensions of the at least one electrical terminal 4 and of the stack a dimension along the third axis Z, that is to say a dimension orthogonal to the first axis X and second axis Y as well as to the first dimensions 411 , 211. It is understood that the present invention also extends to the alternative embodiment, not shown, in which the second dimension 412 is defined by the second axis Z, the whole of the present description applying mutatis mutandis to such an alternative embodiment.
- the term "substantially equal” means the second dimension 412 of the base 41 of the at least one electrical terminal 4 having a value of the order of the second dimension 212 of the stack of electrodes ⁇ 7%, especially ⁇ 3%.
- the electrical connector 42 may, optionally, have a first dimension 421 along the second Y axis of between 20 and 100% of the first dimension 211 of the stack of the plurality of electrodes 2 along the second Y axis.
- the electrical connector 42 may have a second dimension 422 along the third axis Z of between 30 and 90% of the second dimension 412 of the base 41, along this same third axis Z.
- the electrochemical cell 1 allows an increase in the dimensions of the electrical terminal 4 and more specifically of the electrical connector 42 relative to connectors conventionally observed in pouch-type cells.
- Such an increase in the section of the electrical connector 42 makes the electrochemical cell 1 compatible with an increase in the recharging speed of the storage device 10 thanks to a high electric current while preventing the overheating of the electrical connector 42.
- Electrical connector 42 of at least one electrical terminal 4 extends in base 41 at least from housing 100 to the environment outside electrochemical cell 1. Electrical connector 42 projects from the base 41, both within the housing 100, that is to say in the direction of the plurality of electrodes 2, and in the external environment, in particular in order to allow the connection between a plurality of electrochemical cells 1 .
- the electrical connector 42 comprises at least one internal portion 424, extending into the housing 100 and through the base 41 along the first axis X, and an external portion 423.
- the external portion 423 can be planar or substantially flat and/or extend parallel or substantially parallel to an outer face 414 of the base 41 .
- Such a shape of the electrical connector 42 aims in particular to optimize, as further explained below, the assembly of a plurality of electrochemical cells 1 together within a single electrical energy storage device 10 .
- the electrical connector 42 may have a substantially "L" structure.
- the electrochemical cell 1 comprises a plurality of sealed connections of the strip 3.
- the primary connection 5 thus has a continuous closed shape, in particular annular or square or rectangular.
- at least part of an edge of the primary connection 5 can be inscribed in a plane orthogonal to the first axis X.
- the primary connection 5 consists of the connection of the strip 3 over all or part of a thickness, along the first axis X, of the base 41 .
- the electrochemical cell 1 further comprises a secondary connection 6 from an end lateral portion 32a of the strip 3 to an opposite end lateral portion 32b of the strip 3, in particular visible in FIG. 2.
- the end lateral portions 32a, 32b consist of opposite portions connecting together the end portions 31 at which the at least one electrical terminal 4 can be connected.
- the secondary connection 6 is made between parts of the inner face 301 of the strip 3 respectively included in the opposite end lateral portions 32a, 32b.
- the secondary connection 6 can extend parallel, or substantially parallel, to the first axis X. Moreover, preferably, the secondary connection 6 is rectilinear or substantially rectilinear. It is understood that the terms “primary”, “secondary”, “first”, “second” are intended here to distinguish the various components of the invention and not to establish a hierarchy among them.
- the at least one primary link 5 and the secondary link 6 are characterized by a smallest dimension strictly greater than 2 mm. According to the embodiment illustrated in Figures 1 to 10, is meant, in a non-limiting manner, by a "smallest dimension" of the at least one primary link 5 a dimension, not referenced, along the first axis X
- the term “smallest dimension” of the secondary connection 6 also means a dimension along the third axis Z.
- the at least one primary bond 5 can be made by heat sealing or bonding and/or the secondary bond 6 can be made by heat bonding or bonding.
- all or part of the surface of the periphery 415 of the base 41 of the at least one electrical terminal 4 can be treated so as to ensure heat-welding or lasting bonding without defects, compatible with the manufacturing process. as set out below.
- the electrochemical cell 1 can comprise two electrical terminals 4, in particular a first electrical terminal 401 and a second electrical terminal 402. It is understood that all of the characteristics of the previous description relating to “the at least one terminal” can thus extend to the “first electrical terminal 401” and/or to the “second electrical terminal 402”. Furthermore, when the electrochemical cell 1 comprises a plurality of electrical terminals 4, these may be identical or, alternatively, have distinct characteristics.
- the first electrical terminal 401 and the second electrical terminal 402 have at least one equal or substantially equal dimension, in particular their first dimension 411 along the second axis Y or their second dimension 412 along the third axis Z.
- the first electrical terminal 401 and the second electrical terminal 402 may have first dimensions 411 equal or substantially equal to each other and second dimensions 412 equal or substantially equal to each other.
- the first electrical terminal 401 and the second electrical terminal 402 are each arranged at an opposite end portion 31 of the strip 3.
- the electrochemical cell 1 therefore comprises a plurality of primary connections 5, specifically a first primary connection 51 made between the one of the end portions 31 of the strip 3 and the periphery 415 of the base 41 of the first electrical terminal 401, and a second primary connection 52 made between the other of the end portions 31 and the periphery 415 of a base 41 of the second electrical terminal 402.
- the plurality of electrodes 2 is interposed between the first electrical terminal 401 and the second electrical terminal
- the first electrical terminal 401 is connected to four electrodes 2, for example cathodes, and the second electrical terminal 402 is connected to four separate electrodes 2, for example anodes. It is understood that such a configuration is in no way limiting, the number and type of electrodes possibly varying.
- the secondary connection 6 made between the opposite end lateral portions can then be made so as to extend continuously from the first primary connection 51 to the second primary connection 52.
- the base 41 of the at least one electrical terminal 4 can comprise a fixing member 81 configured to ensure the anchoring of the electrochemical cell 1 on a support element 101.
- support element 101 means any element capable of carrying, covering or framing the electrochemical cell 1 such as a bodywork element, a plate or a casing, in particular a bottom or a lid of such a box.
- the electrochemical cell 1 may comprise a plurality of fixing members 81, these being able to be included in the same electrical terminal 4 and/or in separate electrical terminals 4.
- the spacing member 7 comprises at least one recess 71 configured to receive at least one tongue 22 of at least one electrode 2.
- the recess 71 can be configured to receive at least the internal portion 424 of the electrical connector 42 of the at least one electrical terminal 4.
- such a recess 71 can be arranged centrally within the spacing member 7.
- the spacing member 7 may have a first dimension 711 along the second axis Y, substantially equal to or greater than the first dimension 211 of the stack of the plurality of electrodes 2.
- the term “substantially equal” is then understood to mean a first dimension 711 of the spacing member 7 having a value of the order of the first dimension of the stack of electrodes 2 ⁇ 7%, in particular ⁇ 3%.
- the spacing member 7 has a first dimension 711 equal or substantially equal to the first dimension 411 of the base 41 of the at least one electrical terminal 4 and/or the spacing 7 has a second dimension 712 equal or substantially equal to the second dimension 412 of the base 41 of the at least one electrical terminal 4.
- Such an arrangement aims, in particular, to reinforce the mechanical strength of the electrochemical cell 1.
- the spacing member 7 helps to protect the connection interface between the plurality of electrodes 2 and the at least one electrical terminal 4, in particular during the implementation of the manufacturing process of the electrochemical cell 1 as set out below.
- the spacing member 7 may have a honeycomb structure, in particular a honeycomb structure.
- honeycomb structure means a structure having a plurality of cavities 72.
- honeycomb means a plurality of cells 72 of polygonal shape, in particular hexagonal. In particular, such cells 72 can be under vacuum and intended to accommodate a gas produced during the operation of the electrochemical cell 1.
- Such a characteristic gives the spacing member 7 a hollow structure forming a reservoir capable of receiving gases likely to to be generated during operation of the electrochemical cell 1, thus reducing the risks of degassing (or "venting" in English) conventionally observed.
- FIG. 7 illustrates an embodiment of a storage device 10 according to the invention, in particular intended for a motor vehicle, comprising at least one electrochemical cell 1 as previously explained.
- the storage device 10 comprises, by way of example, four substantially identical electrochemical cells 1 according to the invention. It is nevertheless understood that such electrochemical cells may have distinct characteristics.
- All or part of the plurality of electrochemical cells 1 is stacked along at least one direction.
- a provision means "stacked" a positioning of the various cells 1 on top of each other along a vertical direction with respect to a ground on which the vehicle is resting, or, alternatively, a positioning of the various cells 1 next to each other along a direction orthogonal to such vertical direction.
- the electrochemical cells are in particular arranged so that their lateral sides 12 extend facing each other, particularly close to each other.
- adjacent electrical terminals 4 included in separate electrochemical cells 1, adjacent to each other, are arranged in contact with one another, in particular at the level of at least a part of the side edges 416 of their respective bases 41. Furthermore, such electrical terminals 4 can be arranged so as to extend along a common plane 2000.
- the storage device 10 may further comprise a cooling means 9, such as a plate configured to allow the circulation of a cooling fluid, arranged along at least one lateral side 12 of cell 1 .
- a cooling means 9 is thus interposed between adjacent electrochemical cells 1 along at least one direction.
- the lateral sides 12 of the electrochemical cell 1 can have a substantially concave shape.
- the strip 3 converges towards the plurality of stacked electrodes 2.
- the strip may be sufficiently elastic to match both the shape of the plurality of stacked electrodes 2 and the shape of the base 41 without creating any folds and without being deformed beforehand.
- the lateral sides 12 of adjacent cells 1 delimit a cooling means 9, more specifically an intercellular space, allowing, by way of example, the circulation of any gas or cooling fluid, in particular a dielectric fluid, in order to ensuring the cooling of said electrochemical cells 1.
- such a cooling means 9, or intercellular space can also receive, for example be at least partly filled, a material capable of delaying the spread of flames, for example in the form of a block or a resin.
- a material capable of delaying the spread of flames, for example in the form of a block or a resin.
- such a material can be a compressed foam making it possible to apply pressure to the cells 1, in particular the electrodes 2 of the cell 1.
- the configuration of the electrical terminals 4 contributes, moreover, to simplifying the assembly of the storage device 10, more particularly the connection between the various electrochemical cells 4. Indeed, conventionally, the connection of the various cells 1 requires the cutting and the deformation adapted from the various electrical connectors 42, as well as their soldering to a common bus-bar.
- a bus-bar 91 can be positioned directly in contact with the electrical connectors 42 of the various electrochemical cells 1.
- the bus-bar 91 can thus be welded in a single step to the various electrical connectors 42, as illustrated for the two electrochemical cells of left in Figure 7.
- the bus-bar 91 can be screwed to the electrical connectors 42 when these have a prior thread, as illustrated for the two electrochemical cells 1 on the right in Figure 7.
- the invention finally relates to a method of manufacturing an electrochemical cell 1 as described previously.
- Figures 8 to 10 illustrate a mode of execution of the different steps of such a method. Note that, for the sake of clarity, only one of the end sides 11 is illustrated.
- the method according to the invention nevertheless extends to the manufacture of an electrochemical cell 1 comprising at least one electrical terminal 4, for example two electrical terminals 401, 402 as previously described with reference to FIG. 2. Also, any step or sub-step described below with reference to the at least one terminal electrical 4 can be reproduced for a second electrical terminal 402 or for a plurality of additional electrical terminals.
- the method comprises a step of stacking a plurality of electrodes 2.
- the plurality of electrodes 2 is stacked so as to present an alternation of an anode and a cathode.
- adjacent electrodes 2 can be separated by an electrically insulating separation element, not shown, interposed between each adjacent anode and cathode of the plurality of electrodes 2.
- connection step aimed at connecting the at least one terminal to the plurality of electrodes 2 is performed. Specifically, such a connection is made between a plurality of tabs 22, specific to at least one subset of electrodes 2, for example the cathodes, and the internal portion 424 of the electrical connector 42 of the at least one electrical terminal 4 .
- the step of connecting said tabs 22 with the at least one electrical terminal 4 may include a sub-step of positioning the plurality of electrodes 2 so that it extends orthogonally, or substantially orthogonally, to the at least one terminal.
- the plurality of electrodes 2 is arranged so that the tongues 22, specific to at least one subset of electrodes 2, extend towards the at least one electrical terminal 4. In other words, all or part of the tongues 22 extend parallel, or substantially parallel, to the internal portion 424 of the electrical connector 42.
- connection step can include a sub-step of bending or deforming one or more tabs 22 of the plurality of electrodes 2 and a sub-step of welding said tabs 22 to the electrical connector 42.
- the electrochemical cell 1 is then shaped by a step of wrapping all of the plurality of electrodes 2 and at least part of the base 41 of the at least one terminal in the strip 3 not pre-distorted.
- the wrapping step may include a sub-step of positioning the assembly formed by the plurality of electrodes 2 and the at least one electrical terminal 4, connected to each other, on the inner face 301 3 plane strip.
- the wrapping step then comprises a substep of aligning at least one of the end portions 31 of the strip 3 with one of the side edges 416 of the perimeter 415 of the base 41 of the at least one electric terminal 4.
- a positioning of the at least one electric terminal 4 contributes to reinforcing the structure of the electrochemical cell 1 .
- each of said electrical terminals 4 can be positioned at the level of an opposite end portion 31 of the strip 3, thus contributing to better control of the shape of the cell, in particular during the step of wrapping the strip 3.
- the wrapping step finally includes a sub-step of folding the strip 3 into at least one edge and/or a rounding.
- an edge and/or rounding is respectively derived from a corner or a rounding of the base 41 of the at least one electrical terminal 4. » the action of folding at least part of the strip 3 so as to surround the plurality of electrodes 2 and, at least partially, the at least one electrical terminal 4.
- such a folding step makes it possible to hermetically wrap the plurality of electrodes 2 and the at least one electrical terminal 4 with the strip 3 with a limited number of folding(s) of the latter.
- To wrap a set of electrodes of generally parallelepipedal shape only four folds, in particular at 90°, are necessary. No fold is formed around the electrical connector 42, the strip 3 and the electrical connector 4 being contactless.
- reinforcement layers or elements such as nylon laminations of the strip 3, conventionally used to ensure the mechanical strength of the strip 3 during and following the pre-deformation step.
- the structure of the electrochemical cell 1 is thus advantageously simplified.
- the sealing of the electrochemical cell 1 comprises a step of bonding the strip 3 to the base 41 of the at least one electrical terminal 4 at the level of at least the primary connection 5 and a step of bonding the strip 3 to itself. even at secondary link 6.
- the manufacturing method may comprise an additional step of positioning at least one spacing member 7, implemented successively at the connection step, interposed between the plurality of electrodes 2 on the one hand and the at least one electrical terminal 4 on the other hand.
- the spacing member 7 is then arranged so that at least one tab 22 and/or the electrical connector 42 extends partially through the recess 71 of the spacing member 7.
- the spacing member 7 thus participates, with the at least one electrical terminal 4, in ensuring the mechanical strength of the electrochemical cell 1, for example during sealing, in particular under vacuum, of the cell. It thus prevents the strip 3 from collapsing at the interface of connection between the plurality of electrodes 2 and the at least one electrical terminal 4.
- the manufacturing method may comprise a step of surface treatment of the periphery 415 of the base 41 of the at least one electrical terminal 4 carried out before the wrapping step, for example prior to the login step.
- Such treatment aims to ensure a primary bond 5, for example by heat sealing, durable and without defects, compatible with the assembly process.
- the present invention thus proposes an electrochemical cell of the pouch type for an electrical energy storage device, in particular intended for a motor vehicle, advantageously making it possible to overcome the sizing limitations conventionally accompanying the electrical cells of the pouch type due to the implementation of a pre-deformation step by stamping the strip.
- the electrochemical cell thus allows greater sizing flexibility while preserving the tightness of the cell, particularly at the level of at least one electrical terminal.
- the electrochemical cell according to the invention allows the multiplication of the number of electrodes accommodated within the cell, and therefore of the power thereof, and, on the other hand, promotes the cooling of the cell by increasing the useful cooling surface, thus making it more suitable for new charging methods.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2011947A FR3116655B1 (fr) | 2020-11-20 | 2020-11-20 | Cellule électrochimique de type poche pour un dispositif de stockage d’énergie |
| PCT/EP2021/081879 WO2022106426A1 (fr) | 2020-11-20 | 2021-11-16 | Cellule électrochimique de type pouch pour un dispositif de stockage d'énergie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4248518A1 true EP4248518A1 (fr) | 2023-09-27 |
Family
ID=74553984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21807132.2A Pending EP4248518A1 (fr) | 2020-11-20 | 2021-11-16 | Cellule électrochimique de type pouch pour un dispositif de stockage d'énergie |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12614788B2 (fr) |
| EP (1) | EP4248518A1 (fr) |
| KR (1) | KR20230110551A (fr) |
| CN (1) | CN116457988A (fr) |
| FR (1) | FR3116655B1 (fr) |
| WO (1) | WO2022106426A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110053836A (ko) * | 2009-11-16 | 2011-05-24 | 삼성에스디아이 주식회사 | 리튬 폴리머 이차 전지 |
| KR101905077B1 (ko) * | 2012-01-19 | 2018-10-05 | 삼성에스디아이 주식회사 | 배터리 셀용 보강물 및 배터리 셀 |
| KR102103378B1 (ko) | 2015-12-10 | 2020-04-22 | 주식회사 엘지화학 | 가스 흡착제가 포함되어 있는 전극 리드를 구비한 전지셀 |
| CN110364643B (zh) * | 2018-03-26 | 2021-05-18 | 宁德时代新能源科技股份有限公司 | 二次电池以及二次电池的制造方法 |
-
2020
- 2020-11-20 FR FR2011947A patent/FR3116655B1/fr active Active
-
2021
- 2021-11-16 US US18/253,287 patent/US12614788B2/en active Active
- 2021-11-16 KR KR1020237020316A patent/KR20230110551A/ko active Pending
- 2021-11-16 WO PCT/EP2021/081879 patent/WO2022106426A1/fr not_active Ceased
- 2021-11-16 CN CN202180077204.3A patent/CN116457988A/zh active Pending
- 2021-11-16 EP EP21807132.2A patent/EP4248518A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US12614788B2 (en) | 2026-04-28 |
| FR3116655A1 (fr) | 2022-05-27 |
| WO2022106426A1 (fr) | 2022-05-27 |
| CN116457988A (zh) | 2023-07-18 |
| FR3116655B1 (fr) | 2023-04-14 |
| US20240006688A1 (en) | 2024-01-04 |
| KR20230110551A (ko) | 2023-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2661652A1 (fr) | Batterie electrique comprenant des elements generateurs souples et un systeme de conditionnement mecanique et thermique desdits elements | |
| JP2009048966A (ja) | 電池およびその製造方法 | |
| EP2984697A1 (fr) | Accumulateur électrochimique au lithium avec boîtier a dissipation thermique améliorée, pack-batterie et procédés de réalisation associés | |
| FR3116657A1 (fr) | Accumulateur métal-ion muni d’un conduit de dégazage, Module de batterie ou Pack-batterie associé à refroidissement liquide. | |
| EP3360176A1 (fr) | Module de stockage d'énergie électrique et son procédé de fabrication | |
| EP3985769B1 (fr) | Module de batterie à empilement d'accumulateurs à emballage souple loges dans des supports fixes entre eux par encliquetage ou clipsage et supportant des cosses en contact avec pression avec les bornes des accumulateurs | |
| EP0913874A1 (fr) | Accumulateur étanche à enveloppe multicouche | |
| FR3039709A1 (fr) | Accumulateur au lithium a surete de fonctionnement amelioree par un dispositif coupe-circuit integre | |
| FR3037725A1 (fr) | Procede de realisation d'un faisceau electrochimique d'accumulateur au lithium avec mousse metallique aux extremites de feuillards | |
| EP4248518A1 (fr) | Cellule électrochimique de type pouch pour un dispositif de stockage d'énergie | |
| WO2023001464A1 (fr) | Cellule électrochimique de stockage d'énergie électrique | |
| FR2973948A1 (fr) | Dispositif modulaire de cadre conducteur de puissance pour batterie de vehicule automobile, procede de montage de ce dispositif et batterie de vehicule automobile comprenant un tel dispositif | |
| EP4199220A2 (fr) | Module de batterie ou pack-batterie à empilement d'accumulateurs intégrant des liens souples avec formes complémentaires de blocage en tant que moyens de compression, procédé de réalisation d'un module ou pack-batterie associé | |
| FR2974249A1 (fr) | Dispositif modulaire de transport de la temperature pour batterie de vehicule automobile, procede de montage de ce dispositif et batterie de vehicule automobile comprenant un tel dispositif | |
| EP3840099A1 (fr) | Accumulateur électrochimique, notamment un accumulateur métal-ion, à emballage souple intégrant un ou plusieurs orifices de passage de fluide de refroidissement, module et procédé de fabrication associés | |
| WO2021228782A1 (fr) | Etui pour cellule électrochimique pour batterie, agencement de cellules électrochimiques pour batterie comprenant un tel étui et procédé de fabrication d'un tel agencement de cellules | |
| EP4203143A1 (fr) | Procédé et système de gestion d'un dispositif de batterie d'un véhicule électrique ou hybride contenant une mesure de tension des cellules reliées à une barre d'interconnexion | |
| FR3143214A1 (fr) | Module de batterie ou pack-batterie, comprenant une matrice à accumulateurs de format cylindrique, logée et bridée dans un boitier périphérique. | |
| EP4374448A1 (fr) | Cellule électrochimique de stockage d'énergie électrique | |
| EP4386967A1 (fr) | Module de batterie ou pack-batterie, comprenant une pluralité d'accumulateurs de format cylindrique agencés en parallèles les uns aux autres, assemblés par emmanchement dans un flasque de bridage supportant les busbars des bornes de sortie des accumulateurs | |
| EP4187703A2 (fr) | Module de batterie ou pack-batterie à empilement d`accumulateurs à boitier intégrant des liens souples avec formes complémentaires de blocage en tant que moyens de maintien mécanique du boitier, procédé de réalisation d'un module ou pack-batterie associé | |
| WO2025257651A1 (fr) | Cellule électrochimique pour batterie électrique et batterie électrique pour véhicule électrique | |
| FR3119934A1 (fr) | Cellule de batterie et procédé de fabrication d’une telle cellule | |
| EP4677673A1 (fr) | Bloc de cellules de batterie, notamment pour véhicule automobile | |
| FR3161314A1 (fr) | Structure d’assemblage d’au moins une matrice d’accumulateurs électrochimiques à au moins une paroi gonflable continue dans au moins un plan entourant la matrice dans le plan. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20230424 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: AMPERE SAS |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20250911 |