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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
  • H01M50/512—Connection only in parallel
• • 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
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
  • H01M50/522—Inorganic material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
  • B05B7/1404—Arrangements for supplying particulate material
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C24/00—Coating starting from inorganic powder
  • C23C24/02—Coating starting from inorganic powder by application of pressure only
  • C23C24/04—Impact or kinetic deposition of particles
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N25/00—Investigating or analyzing materials by the use of thermal means
  • G01N25/72—Investigating presence of flaws
• • 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
  • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
• • 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
  • 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
  • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic 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
  • H01M50/20—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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/514—Methods for interconnecting adjacent batteries or cells
• • 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 invention relates to the electrical connections between two parts, and more particularly to the quality control of the connection of the cells of a battery between them.
• Motor vehicles increasingly include an electric motor to move the vehicle.
• This electric motor is powered by a so-called traction battery, also called a power battery, having a large capacity.
• These power batteries generally comprise cells with a capacity less than the total capacity of the battery which, electrically connected together, make it possible to reach the total capacity of the battery.
• the good quality of the connection of the cells of a battery to each other is essential to ensure good performance of the battery, increase its lifespan and limit maintenance operations during the life of the vehicle.
• said document describes a connection of the cells with the interconnection bar thanks to a cold spraying of a metal powder.
• the quality of the connection of the cells of a battery fluctuates over time. Indeed, the conductivity of an electrical connection varies according to different parameters such as the materials chosen, the process chosen to make the connection electricity, the intensity of the current flowing through the connection or even the temperature and humidity conditions in which the connection is located.
• the object of the invention is thus to propose a method for monitoring the conductivity of an optimized electrical connection between two parts over time.
• an electrical connection comprising two electrically conductive parts and an agglomerate of an electrically conductive material electrically connecting the two parts, the electrical connection comprising a temperature sensor covered by F agglomerate and a means of recording the temperature sensed by the sensor.
• the senor is a thermocouple.
• H is proposed, secondly, a battery or a battery module comprising cells connected to each other by an electrical connection as previously described and comprising a means of monitoring over time the degradation of the battery or the module based on the analysis of the electrical connection relief means.
• the cells are prismatic cells.
• a motor vehicle comprising a battery as described above and comprising a means of displaying the degradation of the battery displaying the monitoring of the means of monitoring the battery.
• the vehicle comprises an electric vehicle traction motor, the electric motor receiving its energy from the battery.
• a method for checking an electrical connection inserted into a power supply circuit comprising spraying a powder of an electrically conductive material onto two parts electrically conductive, the projection forming by agglomeration of the powder an electrical connector connecting the two parts, the method comprising covering a temperature sensor with the powder forming the connector and recording the temperature sensed by the sensor.
• the method comprises texturing at least one surface of at least one of the two parts, the spraying then being carried out on said surface, the dimensions of the grains of the powder being smaller than the dimensions of the texturing;
• the temperature sensor is a thermocouple;
• the projection of the powder is carried out by following a trajectory having, perpendicular to the direction of projection, a form of slots;
• the projection of the powder comprises a first pass carried out by following a first trajectory having, perpendicular to the direction of projection, the said form of slots and comprises a second pass carried out by following a second trajectory having, perpendicular to the direction of projection, a form of slots arranged substantially perpendicular to the shape of slots of the first trajectory;
• the projection of the powder is a dynamic projection by cold gas
• the method comprises taking several readings of the temperature over time and storing these readings in order to allow monitoring of the electrical connection over time using a reference temperature.
• a method for monitoring the temperature of an electrical connection comprising spraying a powder of an electrically conductive material onto two conductive parts. of electricity developing by agglomeration of the powder an electrical connection between the two parts.
• the method thus makes it possible to electrically connect the two parts or else to improve an already existing electrical connection between the two parts.
• the method further comprises a covering of a temperature sensor by the projected powder and an analysis of the temperature sensed by the sensor with respect to a reference temperature.
• the senor is fixed to the two parts and the risk of the sensor becoming disengaged is practically nil.
• the reliability of the tracking process is increased tenfold.
• thermocouple which is a sensor sufficiently resistant to a projection of powder to form the agglomerate
• the projection of the powder is carried out by following a trajectory having, perpendicular to the direction of projection, a form of slots;
• the projection of the powder comprises a first pass carried out by following a first trajectory having, perpendicular to the direction of projection, the said form of slots and comprises a second pass carried out by following a second trajectory having, perpendicular to the direction of projection, a form of slots arranged substantially perpendicular to the shape of slots of the first trajectory.
• H is proposed, seventhly, an electrical connection comprising two electrically conductive parts and an agglomerate of an electrically conductive material electrically connecting the two parts, the electrical connection comprising a temperature sensor embedded in the agglomerate and a means for recording and analyzing the temperature sensed by the sensor with respect to a reference temperature.
• the senor is a thermocouple.
• H is proposed, eighthly, a battery comprising cells connected to each other by an electrical connection as previously described and comprising a means of monitoring the degradation of the battery based on the analysis of the relief means and electrical connection analysis.
• the cells are prismatic cells.
• a motor vehicle comprising a battery as described above and comprising a means of displaying the degradation of the battery displaying the monitoring of the battery monitoring means.
• the vehicle comprises an electric vehicle traction motor, the electric motor receiving its energy from the battery.
• FIG. IA is a schematic top view of a first embodiment of an electrical connection comprising a sensor integrated into a powder agglomerate;
• FIG. IB is a schematic sectional view of the first embodiment of the electrical connection along the plane IB-IB of Figure IA;
• FIG. 2 is a schematic sectional view of an electrical connection according to a second embodiment
• FIG. 3 is a schematic sectional view of an electrical connection according to a third embodiment
• FIG. 4A - Figure 4A is a schematic sectional view of an electrical connection according to a fourth embodiment along the plane IVA-IVA of Figure 4B; [0038] [Fig. 4B] - Figure 4B is a schematic top view of the fourth embodiment of the electrical connection on which a path of a projection forming the agglomerate is shown;
• FIG. 5 is a schematic top view of an electrical connection according to a fifth embodiment.
• Figure IA shows a first embodiment of an electrical connection 1 comprising a first electrically conductive part 11, a second electrically conductive part 12 and an agglomerate 13 of a powder of a conductive material. 'electricity.
• the agglomerate 13 is in contact with the first part 11 and the second part 12 ensuring an electrical connection between the first part 11 and the second part 12. According to one embodiment, the electrical connection is also ensured by a another room.
• the agglomerate 13 is also fixed to the first part 11 and to the second part 12 ensuring a mechanical retention of the first part 11 and the second part 12 to each other.
• the mechanical fixing is also ensured by another part.
• the agglomerate 13 has the shape of a bead in which the three dimensions of the agglomerate 13 belong to the same order of magnitude.
• the electrical connection 1 also includes a sensor 14 integrated in the agglomerate 13. The sensor 14 is able to detect physical data making it possible to measure or calculate the conductivity of the electrical connection 1.
• the senor 14 comprises a bimetallic junction constituting a thermocouple.
• the end of the thermocouple configured to take the temperature is embedded in agglomerate 13 and the other end is outside of agglomerate 13.
• the senor 14 comprises an optical fiber.
• the electrical connection 1 includes means 15 for reading the physical data detected by the sensor 14.
• the means 15 for reading is, for example, an on-board computer of a motor vehicle or even a tablet.
• thermocouple When the sensor 14 is a thermocouple, the end of the thermocouple outside the agglomerate 13 is used to connect the means 15 for recording the temperature sensed by the sensor 14.
• the senor 14 is connected to a wireless transmission means and the relief means 15 is connected to a wireless reception means.
• the connection between the relief means 15 and the sensor 14 is thus achieved wirelessly, for example by radio-identification (RFID) or by Bluetooth.
• RFID radio-identification
• Bluetooth Bluetooth
• the transmission means connected to the sensor 14 is integrated into the agglomerate 13.
• the physical datum captured, or another datum obtained from this physical datum is, according to one embodiment, compared with theoretical datum in order to monitor the quality of the electrical connection 1.
• an electrical connection 1 makes it possible, for example, to issue an alert in the event of a drop in the quality of the electrical connection 1 in order to allow maintenance of the electrical connection 1 or its replacement.
• the senor 14 is positioned against a surface of the first part 11 and/or against a surface of the second part 12. Thus, the reading of the data by the sensor 14 does not risk be altered by agglomerate 13.
• the dimension of the sensor is smaller than that of the bead.
• the dimension of the sensor is for example of the order of a millimeter, without limitation of shape.
• the first part 11 and/or the second part 12 comprises a saving or specific machining to facilitate the positioning of the sensor 14.
• the electrical connection 1 comprises, under the agglomerate 13, a texturing 16 into which the agglomerate 13 penetrates.
• the texturing 16 is carried out on a surface 17 on which the agglomerate 13 is positioned.
• this surface 17 belongs to the first part 11, to the second part 12 or even to the first part 11 and to the second room 12.
• This texturing 16 increases the contact surface between the agglomerate 13 and the first part 11 and/or the second part 12.
• This texturing 16 also makes it possible to increase the mechanical strength of the attachment between the first part 11 and the second part 12 by the agglomerate 13.
• the texturing 16 is made with a laser.
• the first part 11 and the second part 12 are in frontal contact.
• Figure 2 shows the electrical connection 1 according to a second embodiment which incorporates the characteristics of the first embodiment except that in this second embodiment the first part 11 and the second part 12 are not directly in contact with each other.
• the agglomerate 13 is partly inserted between the first part 11 and the second part 12.
• Figure 3 shows a third embodiment of the electrical connection 1 which incorporates the characteristics of the first embodiment except that in this third embodiment the direct contact between the first part 11 and the second part 12 is obtained by overlapping the first part 11 and the second part 12 between them.
• Figure 4A shows a fourth embodiment of the electrical connection 1 which incorporates the characteristics of the third embodiment except that in this fourth embodiment the first part 11 and / or the second part 12 is pierced at the overlap.
• the bore 18 reveals the surface 17 of the first part 11 or of the second part 12 on which the agglomerate is positioned.
• the agglomerate 13 is made at and around the bore 18.
• Figure 4B illustrates the fourth embodiment from above without showing the agglomerate 13.
• the bore 18 is circular.
• the bore 18 has a different shape.
• the diameter of the hole is 8mm.
• the thickness of the first part 11 and/or the second part 12 is 1mm.
• the agglomerate 13 is preferably produced by spraying a powder of a material that agglomerates during the impact of this powder on the first part 11 and on the second part 12 then during the impact on the powder already projected and agglomerated.
• This projection is preferably carried out cold.
• This technique is called gaseous dynamic cold spraying or cold gas dynamic spraying (better known by its English acronym GDCS for “Gas Dynamic Cold Spray”).
• the powder projection speed is supersonic, for example of the order of several hundred meters per second.
• cold spraying is carried out using a pressure of the order of 20 to 50 bars.
• cold spraying is performed at a temperature substantially below 350°C.
• the oxidation of a projected metallic material powder is avoided and a better electrical conductivity of the connection is guaranteed.
• the material constituting the powder is for example one or more aluminum alloys and/or one or more copper alloys.
• Figure 4B also schematically illustrates a path made to project the powder forming the agglomerate 13.
• the powder is projected in a first pass A following a trajectory, perpendicular to the projection, in slots. Then the powder is projected in a second pass B following a trajectory, perpendicular to the projection, in slots.
• the slots of the second pass B are substantially perpendicular to the slots of the first pass A.
• the senor 14 is first positioned against the first part 11 and/or against the second part 12. Then, the texturing 16 is carried out around the sensor 14. Then, the agglomerate 13 is form. According to one embodiment, the texturing 16 is first carried out. Then, the sensor 14 is positioned against the first part 11 and/or against the second part 12. Then, the agglomerate 13 is formed.
• the texturing 16 is first carried out. Then, a first part of the agglomerate 13 is formed. Then, the sensor 14 is positioned against the first part of the agglomerate 13 formed. Then, a second part of the agglomerate 13 is formed over the first part of the agglomerate 13 already formed.
• FIG. 5 shows a fifth embodiment of the electrical connection 1 which incorporates the characteristics of the third embodiment except that in this fifth embodiment the electrical connection 1 comprises two agglomerates 13.
• the agglomerates 13 are arranged on either side of the first part 11, at the contours of the first part 11 which are in contact with the second part 12.
• the electrical connection 1 connects two cells of a motor vehicle power battery.
• the electrical connections 1 connect the cells to an interconnecting bar.
• several cells connected together form a module and several modules connected together form the power battery.
• the power battery (or traction battery) is connected to an electric motor of the motor vehicle capable of moving the vehicle.
• the cells are prismatic cells.
• the battery is a lithium-ion battery.
• Such an electrical connection 1 thus allows, by covering the sensor 14 with the agglomerate 13, a reading of the physical data captured by the sensor 14 then an analysis of this physical data.
• this analysis can be carried out several times over time in order to follow the evolution of the electrical connection as a function of time.

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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)
• Biochemistry (AREA)
• Materials Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Analytical Chemistry (AREA)
• Physics & Mathematics (AREA)
• General Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Immunology (AREA)
• Pathology (AREA)
• Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Aviation & Aerospace Engineering (AREA)
• Inorganic Chemistry (AREA)
• Connection Of Batteries Or Terminals (AREA)
• Secondary Cells (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=80786150

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• 2021
  • 2021-11-05 FR FR2111771A patent/FR3129036B1/fr active Active
• 2022
  • 2022-11-02 EP EP22812701.5A patent/EP4427289A2/de not_active Withdrawn
  • 2022-11-02 WO PCT/FR2022/052066 patent/WO2023079242A2/fr not_active Ceased
  • 2022-11-02 MX MX2024005489A patent/MX2024005489A/es unknown
  • 2022-11-02 US US18/705,739 patent/US20250007109A1/en active Pending

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