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
  • H01M50/112—Monobloc comprising multiple compartments
• • 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
  • H01M10/655—Solid structures for heat exchange or heat conduction
  • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
• • 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
  • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
• • 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
  • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
  • H01M10/6567—Liquids
• • 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
  • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
  • H01M50/117—Inorganic material
  • H01M50/119—Metals
• • 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
  • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
  • H01M50/121—Organic material
• • 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
  • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
  • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
• • 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
  • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
  • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
  • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
  • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
  • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
• • 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
  • 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
• • 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
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

• TITLE Case for an electrochemical cell for a battery, an arrangement of electrochemical cells for a battery comprising such a case and a method of manufacturing such an arrangement of cells.
• the invention relates to a case for at least one electrochemical battery cell.
• the invention also relates to an arrangement of electrochemical cells for a battery comprising such a case.
• the invention also relates to a row of such cells.
• the invention also relates to a battery module comprising such a row of cells.
• the invention also relates to a battery comprising such a battery module.
• the invention also relates to a motor vehicle comprising such a battery.
• the invention relates to a method of manufacturing an arrangement of electrochemical cells for a battery.
• Certain motor vehicles in particular electric or hybrid motor vehicles, include a power supply battery for supplying electric energy to the electric motor, in particular the traction motor.
• a power supply battery for an electric or hybrid motor vehicle is, for example, of the Lithium-ion (Li-ion) type.
• a battery comprises electrochemical cells comprising an electrolyte.
• Such a battery generally comprises several battery modules or sets of electrochemical cells.
• the cooling element is an attached part, made of a material different from the standard materials of the cell.
• the placement of this cooling element results in a decrease in the energy density of the cells.
• the cooling is not done directly at the level of the electrical connectors of the cells, where heating is most important.
• this solution appears to be irrelevant because the use of one plate per cell requires a large number of connectors in the battery pack, multiplying the risk of leaks.
• the object of the invention is to provide a case for an electrochemical cell for a battery, an arrangement of electrochemical cells for a battery and a method of manufacturing an arrangement of electrochemical cells for a battery.
• battery overcoming the above drawbacks and improving the cells and methods known from the prior art.
• the invention makes it possible to produce a case for an electrochemical cell for a battery, an arrangement of electrochemical cells for a battery and a method of manufacturing an arrangement of electrochemical cells for a battery which are simple and have a reduced cost and which make it possible to '' optimize the cooling of the battery.
• a case to accommodate at least one active element of an electrochemical cell, forms at least one duct intended for the circulation of a cooling fluid, the duct being arranged to be crossed by at least one electrical connector of the electrochemical cell.
• the case is for example a multi-layer of polymer and aluminum films.
• the case may include two sheets shaped and welded to each other, the walls of the conduit being formed by said two welded sheets, the at least one electrical connector being disposed between the two welded sheets.
• an arrangement of electrochemical cells for a battery comprises at least one active element of an electrochemical cell in a case defined above, the at least one electrochemical cell comprising electrical connectors and the conduit being symmetrical with respect to at least one electrical connector that crosses it.
• Each electrical connector can comprise two strips, for example made of polymer, and the cooling fluid can be dielectric.
• a row of electrochemical cells for a battery comprises at least one arrangement of cells defined above, the au at least one conduit extending continuously and / or linearly along at least one of the edges of the case.
• a battery module comprises at least one row of cells defined above or at least one arrangement of cells defined above, the at least one duct forming a cooling circuit.
• a battery comprises at least one module defined above.
• a vehicle comprises a battery defined above or a battery module defined above.
• the invention also relates to a method of manufacturing an arrangement of electrochemical cells for a battery defined above or of a row of electrochemical cells for a battery defined above, in which at least one duct, intended for the circulation of a cooling fluid , is formed by forming and heat-sealing the two faces of the cell case, at least one electrical connector of the cell passing through the conduit.
• the process can include the following steps:
• the method may further comprise the following steps:
• Figure 1 shows a battery module comprising an assembly of several rows of battery cells.
• Figure 2 shows a row of battery cells.
• Figure 3 is a partial perspective and sectional view showing a conduit of a row of battery cells of the type shown in Figure 2.
• Figure 4 is a partial perspective and sectional view showing a bypass module of a battery module of the type of that of Figure 1.
• FIG. 5 shows a first face of a case of a row of cells being formed.
• FIG. 6 represents the pre-forming or forming of the first face and of the second face of the case.
• Figure 7 shows the positioning of a first rod in a trench in the first face of the case.
• Figure 8 shows the positioning of an active element provided with electrical connectors in each housing of the first face of the case.
• Figure 9 shows the assembly formed of the active elements, provided with electrical connectors, and the first rod positioned in the first face of the case, the electrical connectors of the cells being in contact with the first rod.
• Figure 10 shows the positioning of a second rod on the first rod, with the interposition of the electrical connectors of the cells.
• Figure 11 shows the positioning of the second face of the case on the active elements and on the second rod.
• Figure 12 shows the assembly formed of the active elements and the first and second superimposed rods, located above the active elements, closed by the first face and the second face of the case.
• Figure 13 shows the heat-sealing of the first side and the second side of the case.
• Figure 14 shows the removal of the first and second rods.
• Figure 15 shows a row of cells including a duct extending above the cells.
• Figure 16 shows the attachment of a fluid connector at each end of the pipe.
• Figure 17 shows the assembly of a bypass module on each fluid connection at each end of the conduit.
• FIG. 18 shows the assembly of rows of battery cells of the type of that of Figure 2 to form a battery module of the type of that of Figure 1.
• An embodiment of a battery module comprising an assembly of several battery cells is described below with reference to FIG. 1.
• Such a battery is, for example, a power supply battery for an electric or hybrid motor vehicle.
• a battery is for example of the Lithium-ion (Li-ion) type.
• the battery module 1 comprises a plurality of arrangements of electrochemical cells 2, the electrochemical cells being for example of the Li-ion type.
• the x axis corresponds to the longitudinal direction of battery module 1.
• the y axis corresponds to the transverse direction of battery module 1.
• the z axis is a substantially vertical axis. The terms “lower”, “upper”, “above” and “below” are defined with respect to the z axis.
• the electrochemical cells are of the case or pouch or flexible casing or flexible packaging type.
• Each arrangement of electrochemical cells 2 comprises an active element 17, for example of the Li-ion type, surrounded by a portion 24.
• active element is preferably understood to mean an element comprising electrochemically active materials and ionic and electronic conductive materials.
• the invention proposes to include or integrate a cooling circuit for the battery module directly in the packaging with case or pouch or flexible casing or flexible packaging of the cells.
• the electrochemical cells 2 are assembled in sets or rows 3. Such a row 3 of cells 2 is described in more detail below with reference to FIG. 2.
• Each row of cells 3 comprises for example five cells.
• the cells 2 of a row 3 are arranged side by side in the longitudinal direction x.
• a case 10 or pouch 10 or flexible casing 10 surrounds and / or serves as an envelope or packaging, in particular for protection, for the row of cells.
• a heat-sealing strip 22 surrounds each active element 17, which makes it possible to delimit and isolate the cells 2 from each other.
• Each active element 17 is surrounded by a heat-sealed portion 24 of the case 10.
• the case 10 comprises a first main face 11 and a second main face 21.
• the first face 11 and the second face 21 are substantially symmetrical and extend along the plane (x, z).
• the first face 11 of the case 10 is for example a multi-layer of polymer and aluminum films and the second face 21 of the case 10 is for example a multi-layer of polymer and aluminum films.
• the row of cells 3 comprises a duct 25 intended for the circulation of a cooling fluid.
• the duct 25 is intended to form part of a cooling circuit of the battery module 1.
• the conduit 25 is integrated into the case 10 of the row of cells 3.
• the conduit 25 is formed of a portion of the first face 11 of the case 10 and of a portion of the second face 21 of the case. 10.
• the conduit 25 is made of the same material as the portions 24 of the case 10 surrounding each active element 17.
• the conduit 25 is of a material commonly used in an arrangement of battery cells. This results in a reduced cost of such an arrangement of cells.
• Each active element 17 comprises a stack of at least one positive electrode (or cathode), at least one negative electrode (or anode), and at least one electronically insulating and ionic conductive separator film.
• a so-called all-solid configuration is used.
• An ionically conductive solid electrolyte constitutes the separator film and is incorporated into the positive and negative electrodes.
• Each active element 17 is provided with at least one electrical connector 19.
• the electrical connector or connectors 19 are for example located at the level of the upper surface of the active element.
• Each active element 17 is for example provided with two electrical connectors 19.
• the duct 25 extends above the active elements 17.
• the duct 25 extends in the longitudinal direction x above the different cells 2, continuously and / or linearly.
• the electrical connectors 19 of the cells pass through the conduit 25. This is clearly visible in FIG. 3.
• the duct 25 is intended in particular for cooling the electrical connectors 19 of the cells, where heating is maximum.
• the duct 25 is intended for the circulation of a cooling fluid.
• the cooling fluid is for example a dielectric fluid. Such a dielectric fluid being inert, it can be in direct contact with the electrical connectors 19 of the cells which are metallic and under tension.
• the duct 25 is symmetrical in the plane (y, z) with respect to the electrical connectors 19.
• the width W1 in the transverse direction y of the portion of the duct 25 situated between the connectors 19 and the first face 11 of the case 10 is substantially equal to the width W2 in the transverse direction y of the portion of the duct 25 situated between the connectors 19 and the second face 21 of the case 10. This results in optimized cooling of the electrical connectors 19.
• the width W1 is for example between 4 mm and 6 mm, and the width W2 is for example between 4 mm and 6 mm.
• a heat-sealing strip 23 extends above the duct 25. Another heat-sealing strip 23 extends below the duct 25, between the duct 25 and the cells 2. The heat-sealing strips 23 extend in the longitudinal direction x. The heat-welded strips 23 make it possible to guarantee the tightness of the duct 25 over its entire length in the longitudinal direction x.
• each electrical connector 19 comprises two strips, in particular made of polymer, located at the level of the two heat-welds 23. These strips provide the seal between the face 11 and the electrical connectors 19, and between the face 21 and the electrical connectors 19. This results in the sealing of the duct 25, a weld being made on either side of the duct between each electrical connector 19 and the first and second faces 11, 21 of the case 10.
• the row of cells 3 may further include a fluid connector 27 (not visible in Figure 2) attached to each end of the conduit 25.
• the row of cells 3 may further include a bypass module
• Each bypass module 29 assembled on the fluid connector 27 at each end of the conduit 25.
• Each bypass module 29 can include a fluid branching
• Battery module 1 is an assembly of several rows of cells 3.
• the rows of cells 3 are assembled against each other.
• the cases 10 of each row of cells 3 are stacked by joining their main faces.
• the first main face 11 of the case 10 of a row of cells 3 is disposed against the second main face 21 of the case 10 of another row of cells 3.
• the conduits 25 of the rows of cells 3 form a cooling circuit for the battery module 1.
• the cooling circuit is intended in particular for cooling the electrical connectors 19 of the cells, where heating is maximum.
• the cooling circuit is intended for the circulation of a dielectric fluid.
• each row of cells located at each end of the conduits 25, are superimposed.
• the cooling circuit is formed by the conduits 25 of each row of cells 3 interconnected by the bypass modules 29.
• the stack of bypass modules 29 forms the inlet 4 of the cooling circuit d 'a lateral side of the module 1.
• the stack of bypass modules 29 forms the outlet 6 of the cooling circuit on the other lateral side of the module 1.
• the circulation of the cooling fluid is represented by arrows 31 in Figure 1.
• each electrochemical cell 2 comprises electrical connectors 19 located on one side of the cell, on only one of the main faces of the cell.
• each row of cells can comprise a single through duct 25, extending in the longitudinal direction x. According to a variant, several conduits 25 can be provided for each cell or row of cells.
• each cell 2 can include electrical connectors 19 located on two opposite sides of the cell, on both sides of the cell.
• Each cell 2 comprises for example two electrical connectors 19, an electrical connector 19 being located on an upper face of the cell, and an electrical connector 19 being located on the underside of the cell.
• each row of cells may include a first conduit and a second conduit parallel to each other and extending in the longitudinal x direction.
• FIGS. 5 to 17 An embodiment of a method of manufacturing an arrangement of electrochemical cells for a battery of the type of that of FIGS. 1 to 4 is described below with reference to FIGS. 5 to 17. This embodiment is described in the case of a cell for a battery comprising electrical connectors located on one side of the cell.
• the invention proposes to form the at least one conduit directly during the assembly or shaping of the cell, during the heat-sealing or heat-sealing step of the case.
• the conduit is obtained by forming and then heat-welding the two sides of the cell case.
• FIG. 5 represents a first face 11 of the case 10 of a row 3 of cells being formed.
• the second face 21 of the case 10 is similar to the first face 11.
• the first face 11 of the case 10 is for example a multi-layer of polymer and aluminum films.
• the second face 21 of the case 10 is, for example, a multi-layer of polymer and aluminum films.
• first face 11 of the case 10 and the second face 21 of the case 10 are formed.
• first pre-formed face 11 is shown in FIG. 6, but the pre-forming of the second face 21 is carried out similarly to that of the first face 11.
• Shaping or forming or preforming of sheets 11 and 21 can be accomplished using a die.
• the matrix comprises patterns corresponding to the future cell arrangements 2 and to the future duct 25.
• each sheet 11, 21, a crenel or trench 12 is formed in each sheet 11, 21, a crenel or trench 12 is formed.
• the trench 12 extends along a longitudinal edge of each sheet 11, 21.
• the trench 12 extends over the entire length L of the sheet 11, 21, on part h of its height H.
• each housing 13 is intended for the subsequent placement of an active element 17.
• a row of several housings 13 is formed, for example a row of five. housings 13.
• a succession of housings 13 is formed in the longitudinal direction x.
• the trench 12 extends for example above the housing 13.
• the length L of the sheet 11, 21 is for example between 250 mm and 400 mm.
• the height h of the trench 12 is for example between 4 mm and 12 mm.
• the height H of the sheet 11, 21 is for example between 100 mm and 150 mm.
• the width I of each housing 13 is for example between 40 mm and 70 mm.
• a first rod 15a is positioned in the trench 12 of the sheet 11, previously formed during the pre-forming of the sheet 11 of the case 10.
• the rod 15a is made of an electrically non-conductive material, rigid and resistant to heat. Indeed, the electrical connectors 19 of the cells will subsequently all be in contact with this rod, and it must remain in place and withstand the rise in temperature during the heat-welding step.
• the rod 15a is for example made of a polymer, for example of Teflon.
• an active element 17, for example of lithium-ion type is positioned in each housing 13 of the first face 11 of the case 10 previously formed.
• the active elements 17 have been previously equipped with electrical connectors 19. Each active element 17 is for example provided with two electrical connectors 19. The active elements 17 are positioned so that the electrical connectors 19 cover the first rod 15a.
• each electrical connector 19 comprises two strips, in particular made of polymer. The structure obtained at the end of this step is shown in FIG. 9. The electrical connectors 19 of the cells are in contact with the rod 15a.
• a second rod 15b is positioned on the first rod 15a, with the interposition of the electrical connectors 19 of the cells.
• the two rods 15a and 15b are arranged in an aligned manner, substantially parallel.
• the two rods 15a, 15b sandwich the row of electrical connectors 19 of the cells.
• the rod 15b is made of an electrically non-conductive material, rigid and resistant to heat.
• the electrical connectors 19 of the cells are all in contact with this rod, and it must remain in place and withstand the rise in temperature during the heat-welding step.
• the rod 15b is for example made of a polymer, for example of Teflon.
• each rod 15a, 15b is greater than the length L of the leaves 11, 21.
• the sheet 21, corresponding to the second face of the case 10 is positioned on the active elements 17 and the second rod 15b.
• the active elements 17 are positioned in the housings 13 of the sheet 21 and the second rod 15b is positioned in the trench 12 of the sheet 21.
• each connector 19 is located outside the case 10. At least a portion of each rod 15a, 15b is on the outside of the case 10, at least on one side of the case 10. This will allow the subsequent removal of the rods 15a, 15b.
• the first rod 15a and the second rod 15b are intended to allow the formation of the future duct 25, by maintaining a space between the first face 11 and the second face 21 of the case 10 at the location of the trenches 12. The space will form the interior of the duct 25 once the rods 15a, 15b have been removed.
• the heat-sealing step is for example carried out in a heat-sealing machine, for example using a dedicated die.
• the matrix comprises patterns corresponding to the future cell arrangements 2 and to the future duct 25.
• the conduit which will receive the dielectric fluid retains its shape during the heat-sealing step of the cell cases thanks to the two previously placed rods 15a, 15b.
• the conduit being formed is located at the location of the trenches 12 of each sheet 11, 21 of the case 10.
• a heat-sealing strip 22 surrounds each portion of the first face 11 and the second face 21 of the case 10 around the housings 13.
• Each active element 17 located in a housing 13 of the faces 11, 21 of the case 10 is thus surrounded by a portion 24 of the case 10, sealed by the heat-sealing strip 22.
• Two substantially parallel heat-welded strips 23 are formed on either side of the trench 12 of the faces 11, 21 of the case 10. Each heat-welded strip 23 extends in the longitudinal direction x, over the entire length. the length L of the sheets 11, 21.
• a heat-sealing strip 23 extends above the trenches 12 and a heat-sealing strip 23 extends below the trenches 12.
• the conduit 25 has thus been formed in the case 10 between the two bands. thermo-welds 23.
• the leaktightness of the duct 25 is guaranteed thanks to the two heat-sealing strips 23.
• a solder 23 with each connector 19 is made on either side of the duct. This operation simultaneously welds each connector 19 with the sheet 11 and the sheet 21, and welds the sheet 11 with the sheet 21 for the non-connector surfaces.
• a seventh step illustrated in FIG. 14 the two rods 15a, 15b are withdrawn by traction, from a lateral side of the case 10.
• the rods 15a, 15b are withdrawn thanks to the portion of the rods 15a, 15b protruding from the 'case 10.
• FIG. 15 shows the structure obtained after the removal of the rods 15a, 15b.
• a row of cells 3 comprising a duct 25 extending above the arrangements of cells 2 is thus obtained.
• the conduit 25 is intended for the circulation of a dielectric fluid.
• the conduit 25 is crossed by the row of electrical connectors 19.
• the duct 25 is symmetrical with respect to the electrical connectors 19 of the cells.
• suitable dimensions will be provided for the rods 15a and 15b and for the depth of the trenches 12 in the transverse direction y.
• Each arrangement of cells 2 comprising an active element 17 is sealed by a heat seal strip 22.
• the two heat seal bands 23 on either side of the duct 25 keep it closed along its entire length.
• a fluid connector 27 is added to each end of the duct 25.
• the fluid fittings 27 are for example fixed with sealing glue.
• a bypass module 29 is assembled on each fluid connection 27 at each end of the duct 25.
• a row 3 of cells is thus obtained, the case 10 of which is provided with an integrated duct 25.
• the structure obtained is illustrated in FIG. 2.
• Figure 18 illustrates the assembly of a plurality of rows 3 of cells obtained by a method of the type described in relation to Figures 5 to 17, to form a battery module 1.
• the rows of cells 3 obtained at the end of the method described in relation to FIGS. 5 to 17 are stacked.
• a main face of the case 10 of a row of cells 3 is contiguous to the main face of the case 10 of another row of cells 3.
• bypass modules 29 of each row of cells 3 are superimposed, which makes it possible to obtain the input 4 of the cooling circuit on one lateral side of the module 1, and the output 6 of the cooling circuit on the other side. side of module 1.
• a functional battery module 1 of the type of that of FIG. 1 is then obtained.
• a battery module 1 has thus been formed comprising a cooling circuit formed of the conduits 25 of the rows of cells 3 interconnected by the bypass modules 29.
• the cooling circuit can accommodate a flow of dielectric fluid, the circulation of which is illustrated by arrows 31 in figure 1.
• the cell terraces have a higher side than the side usually used for battery cells.
• a cell of the type of that of FIG. 2 is in fact associated with a duct 25 intended for the circulation of a cooling fluid and must withstand additional mechanical stresses linked to this cooling.
• An advantage of a battery cell arrangement of the type described above is that it allows the cooling circuit to be included from the design of the cell. This results in a simple mechanical architecture of a battery module comprising such cell arrangements.
• Another advantage of an arrangement of cells for a battery of the type described above is linked to the fact that the case usually used for packaging the cell is also used to form the circuit. cooling. It follows that such an arrangement of cells does not require additional material dedicated to the cooling circuit. This makes it possible to reduce the cost of a battery module comprising such arrangements of cells.
• An advantage of a method of manufacturing an arrangement of cells for a battery of the type described above is linked to the fact that the duct is shaped at the stage of assembling the cells.
• Another advantage of a battery cell arrangement of the type described above is that the dielectric fluid is in direct contact with the electrical connectors of the cells. This results in an optimization of the collection and evacuation of calories.
• a duct is located above the cell, along a longitudinal edge of the cell.
• a similar duct may be provided above the cell (s), along the other longitudinal edge of the cell (s), in addition to or instead of the conduit located above the cell (s).
• a similar duct could also be provided along one or more side edges of the cell or of the row of cells.
• a duct 25 extends continuously and / or linearly along at least one of the edges of the cell or of the row of cells.
• a method of manufacturing a row 3 of five cells 2 has been described above. Of course, such a method applies to the formation of a single cell 2 associated with a duct 25 integrated into the case 10. of the cell. Such a method applies to the formation of a row of cells comprising any number of cells 2.
• a battery module for a motor vehicle has been described above.
• the invention applies to any system incorporating a battery, for example stationary systems, to all electric or electrified rolling vehicles (bus, scooter, motorbike, etc.), to electronic and portable devices, etc.
• the battery comprises at least one porous positive electrode, at least one porous negative electrode and at least one porous separator film.
• the method is suitable and includes a step of injecting the liquid electrolyte to fill the pore volumes of the active elements 17.
• the sixth step illustrated in Figure 13 is carried out in two stages. Thermo-welding is carried out, except on the lower part of the portions. The liquid electrolyte is then injected at the lower part of the portions. Finally, a final heat-welding step is performed for the lower part of the cells, to close the assembly and make it waterproof.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Aviation & Aerospace Engineering (AREA)
• Inorganic Chemistry (AREA)
• Secondary Cells (AREA)
• Battery Mounting, Suspending (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Connection Of Batteries Or Terminals (AREA)

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• 2020
  • 2020-05-13 FR FR2004732A patent/FR3110287B1/fr active Active
• 2021
  • 2021-05-10 US US17/998,513 patent/US20230246279A1/en active Pending
  • 2021-05-10 EP EP21724297.3A patent/EP4150698A1/de active Pending
  • 2021-05-10 WO PCT/EP2021/062361 patent/WO2021228782A1/fr unknown
  • 2021-05-10 JP JP2022567288A patent/JP2023530212A/ja active Pending
  • 2021-05-10 CN CN202180034858.8A patent/CN115552697A/zh active Pending
  • 2021-05-10 KR KR1020227043607A patent/KR20230011992A/ko active Search and Examination

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