Classifications

• • 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
  • H01M10/6553—Terminals or leads
• • 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
  • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
• • 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
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
• • 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
  • H01M10/65—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
• • 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
  • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
• • 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
  • H01M50/51—Connection only in series
• • 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
• • 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
• • 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 present invention relates to the thermal regulation of batteries and more particularly to a thermal fluid thermal regulation device for a battery in the field of electric and hybrid vehicles.
• the thermal regulation of batteries is an important point because, if the batteries are subjected to too low temperatures, their autonomy can decrease sharply and, if they are subjected to too high temperatures, there is a risk of thermal runaway that can lead to the destruction of the battery.
• the batteries are generally in the form of cells juxtaposed parallel to each other in a protective housing, forming a battery module.
• the cells are generally juxtaposed so that the terminals are alternated in order to connect the cells in series between them easily and also to save conductive material, such as copper.
• conductive material such as copper.
• These temperature control devices are generally incorporated inside a housing containing one or more battery modules and use circulating heat transfer fluids, for example by means of a pump, in a circuit of conduits, the circuit of conduits passing in particular under or inside a heat exchange plate in direct contact with the cells.
• the heat transfer fluids can thus absorb heat emitted by the cells in order to cool them and evacuate this heat at one or more heat exchangers, such as for example a radiator. Fluids heat transfer agents can also, if necessary, bring heat to heat the cells, for example by being connected to an electrical resistance or heating by Positive Temperature Coefficient (PTC).
• PTC Positive Temperature Coefficient
• the heat transfer fluids generally used are ambient air or liquids, such as water, or a refrigerant. Liquids are better heat conductors than gases, it is a solution that is preferred because it is more efficient.
• the heat exchange plates in direct contact with the cells are placed at the bottom of the housings containing one or more battery modules, the battery modules resting on the heat exchange plates.
• Such an arrangement has a disadvantage since it cools an area that needs it the least.
• Another known possibility is to place the heat exchange plates between the cells.
• Such an arrangement has a drawback related to the complexity of assembling such a battery module by alternating heat exchange plates and cells. Such heat exchange plate locations are not optimal because the maximum heating zones of the battery modules are located between the cell connection lugs.
• One of the aims of the invention is therefore to overcome the drawbacks of the prior art and to propose a thermal management device for an optimized battery module, in terms of performance, assembly time and wiring of the battery modules.
• the invention relates to a heat exchange device for a battery module consisting of cells juxtaposed in parallel and connected in series with each other, whose positive and negative terminals, in particular alternating, are each covered with a terminal, forming two aligned series of terminals, and connected together by means of connection fixed to the lugs by fasteners.
• the heat exchange device comprises a heat exchange plate, in particular comprising an inlet and a heat transfer fluid outlet, the heat exchange plate being placed in contact with the battery module between the two aligned series of pods. .
• the inlet and the heat transfer fluid outlet of the heat exchange plate are arranged on the same side of the heat exchange plate, on the one hand to facilitate assembly and on the other hand part to homogenize the temperature of the heat exchange plate.
• the thermal management device further comprises a non-conductive holding plate for holding the connection means and the heat exchange plate, the holding plate being placed so as to maintain the heat exchange plate against the battery module. Furthermore, it also ensures an electrical connection between the lugs of juxtaposed cells via the connection means.
• the holding plate has holes for passage of the pods. Furthermore, the fastening elements of the connection means also ensure the fixing of the holding plate.
• the holding plate comprises an insulating separating element between the heat exchange plate and the connection means.
• the insulating separating element is composed of two ribs coming from material with the holding plate.
• the connection means are integral with the holding plate.
• the holding plate is overmolded around the connection means.
• the holding plate is made of plastic.
• FIG. 1 shows an exploded perspective view of a battery module according to the present invention
• FIG. 2 shows a perspective view of the battery module of FIG. 1 assembled
• FIG. 3 shows a perspective view of the battery module of FIG. 1 with an associated heat exchange plate, a holding plate having been removed,
• FIG. 4 shows a perspective view of the faces of a heat exchange plate according to the present invention.
• FIGS. 5a and 5b show schematic views of electrical connections of the battery module according to the present invention.
• FIG. 1 shows an exploded perspective view of a battery module 1
• FIG. 2 shows a perspective view of the battery module 1 assembled with a thermal regulation device installed.
• the battery module 1 comprises at least one cell 3.
• the battery module 1 comprises several cells 3 juxtaposed, advantageously parallel to each other.
• Each cell 3 comprises a positive electrical terminal and a negative electrical terminal covered with a terminal 4.
• the cells 3 are juxtaposed parallel to each other so that the positive terminal of a cell 3 is placed vis-à-vis the negative terminal of the cell or 3 juxtaposed on its sides.
• the positive and negative terminals are therefore alternating forming two aligned series of lugs 4.
• FIG. 5b Such an arrangement of the cells 3 of the battery module 1 is shown in FIG. 5b.
• the cells 3 are juxtaposed parallel to each other so that the positive terminals of the cells 3 are arranged on the same side of the battery module 1. Therefore, the positive terminals of the cells 3 are arranged on the same side of the battery module 1.
• the positive and negative terminals are thus aligned forming two aligned series of lugs 4.
• FIG. 5a Such an arrangement of the cells 3 of the battery module 1 is shown in FIG. 5a.
• FIGS. 5a and 5b thus show schematic views of the electrical connection of the battery module 1 according to the present invention.
• the cells 3 are connected in series by means of connection means 6.
• the connection means 6 make it possible to electrically connect the positive terminal of a cell 3 to the negative terminal of a neighboring cell 3.
• connection means 6 may in particular be brass plates comprising two orifices permitting the passage of the lugs 4.
• the means of Connections 6 are generally held in place by fastening elements 8, for example nuts 8 which screw on the terminals 4.
• the cells 3 positioned at the end of the battery module 1 each have an opposite charge-free terminal, so as to form the connection terminals of the battery-module 1 to an electrical network of a motor vehicle
• the fact that the positive and negative terminals of the cells 3 of the battery module 1 are alternated enables the different cells 3 to be connected in series by virtue of the shorter connection means 6.
• the negative terminals of each cell 3 have lugs 4 of a larger diameter than the lugs 4 of the positive terminals, or vice versa.
• the cells 3 are interconnected by tie rods, not shown.
• the tie rods also connect the two lateral flanges 13
• a thermal management device comprising a heat exchange plate 10 is provided.
• the lugs 4 are arranged in series on two opposite sides of the battery module 1. Between the two series of lugs 4, the battery module 1 defines a space in which the heat exchange plate 10 is placed between the lugs 4, as shown in FIG. 3, and is in contact with the battery module 1.
• the heat exchange plate 10 generally made of metal, defines an interior volume for defining a heat transfer fluid circuit.
• the plaque heat exchange 10 makes it possible to ensure a heat exchange between the battery module 1 and an external thermal management circuit.
• the heat exchange plate 10 comprises a heat transfer fluid inlet 12A and a heat transfer fluid outlet 12B connected to the external thermal management circuit.
• the heat transfer fluid inlet 12A and the heat transfer fluid outlet 12B can be placed on the same side of the heat exchange plate 10 to facilitate assembly and connections.
• the heat transfer fluid inlet 12A and the heat transfer fluid outlet 12B can be placed on different sides of the heat exchange plate 10.
• heat exchange plate 20 between the lugs 4 allows thermal management of the battery module 1 in a specific area in which it is particularly necessary. Indeed, for example, when using the battery module 1, the largest heat production is located between the electrical terminals because of the electrochemical reactions inside the cell 3. In addition, a strong current passing through the connection means 6, the resistance to the current flow of the connection means 6 also leads to heat production.
• the present invention makes it possible to thermally manage the battery module 1 in the areas in which the production of heat is important.
• the connection means 6 may include extensions in the direction of the zone between the lugs 4 of the battery module 1 in order to promote the cooling of the connection means 6.
• FIG. 3 shows a perspective view of the battery pack 1 of FIG. 1 in which the associated holding plate 20 has been removed.
• FIG. 3 shows the heat exchange plate 10.
• the heat exchange plate 10 is held in place between the lugs 4 by the holding plate 20.
• the holding plate 20 is advantageously non-conductive.
• the holding plate 20 is made of insulating material, for example plastic material.
• the holding plate 20 is placed above the heat exchange plate 10. The heat exchange plate 10 is thus taken between, on the one hand, the battery module 1 and, on the other hand, the plate keeping 20.
• the holding plate 20 has a surface substantially equal to the surface of the battery module 1.
• the holding plate 20 has orifices 22 in which the lugs 4 can pass.
• the holding plate 20 also allows the connection means 6 to be maintained.
• the holding plate 20 can be fixed by the fastening elements 8 which also secure the connection means 6. Consequently, according to this arrangement
• the connection means 6 are taken between, on the one hand, the battery module 1 and, on the other hand, the holding plate 20.
• the heat exchange plate 10 and the connection means 6 are thus maintained. on the battery module 1 with a uniform pressure exerted on its entire surface by the holding plate 20.
• the holding plate 20 also allows electrical insulation between the heat exchange plate 10 and the connection means 6 of the battery module 1.
• the holding plate 20 comprises at least one separation element 24, presented in more detail in FIG. 4. More specifically, FIG. 4 shows a perspective view of the faces of the heat exchange plate 10 and the holding plate 20 according to the present invention.
• FIG. 4 shows a perspective view of the faces of the heat exchange plate 10 and of the holding plate 20 which are in contact with the battery module 1.
• the separating element 24 is advantageously insulating and may be composed of two ribs 24.
• the separating element 24 is made of material with the holding plate 20.
• the separating element 24 may be fixed on the plate keeping 20.
• the separating element 24 is interposed between, on the one hand, the lugs 4 and / or the connection means 6 and, on the other hand, the heat exchange plate 10
• the holding plate 20 and the connection means 6 are integral with each other.
• the holding plate 20 may be overmolded around the connection means 6.
• the thermal management device allows a thermal management of the battery module 1 in a zone particularly subject to significant thermal stress, that is to say between and / or near the means 6.
• the management system thermal allows additional maintenance of the cells 3 between them and a greatly reduced wiring time.
• At least one insulating layer 30 in order to increase the thermal conductivity and / or the thermal insulation of the thermal management device according to the present invention.
• a first insulating layer 32 is disposed between the heat exchange plate 10 and the holding plate 20.
• the first insulating layer 32 makes it possible to improve the thermal insulation and to reduce losses. thermal outward of the battery module 1.
• the thermal insulation function being performed by the holding plate 20 is only a dimensional compensation means.
• the first insulating layer 32 may then be in the form of a compressible plastic film.
• a second insulating layer 34 is disposed between the heat exchange plate 10 and the battery module 1.
• the second insulating layer 30 makes it possible to improve the heat transfer between the heat exchange plate 10 and the battery module 1.
• the insulating layer 30 also makes it possible to compensate for flatness defects of the battery module 1, the heat exchange plate 10 and / or the holding plate 20.
• the insulating layer 30 advantageously provides an electrical insulation function. For example, in the case of the use of a single layer 34, it ensures:
• the means of connection 6 are arranged, at least in part, in the area between the lugs 4 of the battery module 1.
• connection elements 6 may comprise extensions in the direction of the zone between the lugs 4 of the battery module 1 in order to promote cooling the connection means 6.
• connection means 6 and / or the extensions of the connection means 6 are arranged between the cells 3 and the heat exchange plate 10.
• the heat exchange plate 10 is between the cells 3 and the connection means 6 and / or the extensions of the connection means 6.
• connection means 6 by direct contact with the heat exchange plate 10 or via the extensions of the connection means 6 in direct contact with the heat exchange plate 10.
• electrical insulation is provided either by the holding plate 20 or by the insulating layer 30, advantageously the second insulating layer 32.

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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)
• Inorganic Chemistry (AREA)
• Secondary Cells (AREA)
• Battery Mounting, Suspending (AREA)

Applications Claiming Priority (2)

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Citations (1)

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• 2011
  • 2011-12-07 FR FR1103746A patent/FR2984016A1/fr not_active Withdrawn
• 2012
  • 2012-11-30 EP EP12791795.3A patent/EP2828920A1/de not_active Withdrawn
  • 2012-11-30 WO PCT/EP2012/074030 patent/WO2013083479A1/fr active Application Filing

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