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
  • H01M10/61—Types of temperature control
  • H01M10/613—Cooling or keeping cold
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K11/00—Arrangement in connection with cooling of propulsion units
  • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
• • 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
  • H01M10/60—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
  • H01M10/65—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
  • H01M10/6554—Rods or plates
• • 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
  • 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
  • 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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
• • 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
  • H01M50/218—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
  • H01M50/222—Inorganic material
  • H01M50/224—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
  • H01M50/20—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
  • H01M50/227—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
  • H01M50/20—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
  • H01M50/229—Composite material consisting of a mixture of organic and inorganic materials
• • 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
  • H01M50/231—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 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
  • H01M50/249—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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/271—Lids or covers for the racks or secondary casings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
  • B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
  • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
  • B60K2001/0438—Arrangement under the floor
• • 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 present invention relates to a compartment for equipment capable of giving off heat during its operation, in particular for an electrical energy storage device for a motor vehicle.
• Patent applications US2017176108 and WO 2013056938 describe heat exchangers for cooling battery cells. Furthermore, patent application US 2011/0206967 A describes an example of such a battery.
• the cells are stored in containers having housings for receiving the cells.
• One wall of the containers, intended to be in contact with a wall of a neighboring container, has recesses forming part of a duct for the circulation of a heat transfer fluid.
• the present invention aims in particular to improve the sealing of the compartments for receiving battery cells.
• the present invention relates to a compartment for equipment capable of releasing heat during its operation, in particular for an electrical energy storage device for a motor vehicle, this compartment comprising at least one plate. cooling arranged to be traversed by a cooling fluid and arranged to cool said equipment, the compartment comprising a bottom cover comprising at least one layer of composite material and an additional layer of unreinforced polymer material, said additional layer being in particular impermeable to coolant.
• One aspect according to the invention proposes that the case comprises two additional layers of unreinforced polymer material, said additional layers being in particular impermeable to the cooling fluid.
• the composite material layer can be arranged between the two additional layers.
• the housing further comprises a flame retardant layer made of a flame retardant material. We can also talk about a fire barrier.
• the compartment comprises at least one channel for circulating a cooling fluid, this channel being obtained by molding of a polymer-based material, with assisted injection of a fluid, in particular assisted injection. of a gas or a liquid, to form this channel in the polymer-based material.
• compartment for example to receive battery cells, which also has a function of cooling these cells, the manufacture of which is simplified.
• Another aspect proposes that the formation of the coolant channel (s) in the polymer-based material by assisted injection of a liquid or a gas makes it possible to have a one-step manufacturing process, at the same time. instead of a multi-step process to form the channel (s) that would require soldering.
• the invention makes it possible to avoid certain sealing problems linked to leaks of cooling fluid.
• the channel or channels are formed by hollow shapes directly in the material, these leakage problems are avoided. Manufacturing operations are further simplified.
• the channel has a seamless inner wall, as a result of the hollowing out of the polymer material by the fluid injected during molding.
• the channel has a cylindrical shape, at least over part of its length, in particular with a rectangle or oval or round cross section.
• the polymer-based material in which the channel is formed is bonded to a layer of polymer-based composite material.
• connection is in particular the result of a molding, in particular overmolding or co-molding, between the material which comprises the channel or channels for the circulation of cooling fluid and this layer of composite material.
• the composite material layer has an opening and the material that forms the channel passes through this opening so that channel also passes through this opening of the layer.
• the material from which the channel is formed is in the form of a layer which extends over one side of the layer of composite material.
• this layer of composite material and the layer are flat over at least part of their area.
• these two layers have an edge inclined relative to this flat part, and the channel passes through the layer of material on this edge.
• the channel in the material connects to a fluidic connection member, in particular on this inclined edge.
• this fluidic connection member is molded from the material of the layer which comprises the channel.
• the composite material layer comprises at least two channels resulting from assisted injection, these channels being called parallel over a major part of their length.
• the compartment has a cooling plate disposed on one side of the composite material layer which is opposite to the side of the molded material layer.
• the plate is arranged to be traversed by a cooling fluid also circulating in the channels. of the molded layer.
• These channels are in particular feeder channels which respectively supply and evacuate the cooling fluid circulating in the plate.
• a single feeder feed channel and a single feeder discharge channel are provided.
• the layer which comprises the feeder channels comprises a connection portion made in one piece with the rest of the layer and which is arranged to be connected to the cooling plate. .
• This connection portion protrudes through the layer of composite material.
• the channels are formed only in the layer of molded material, in other words the channels are not formed by the assembly of two separate layers for example.
• the layer comprises grooves to form the channels and reinforcing ribs, in particular in the shape of a honeycomb, for the mechanical reinforcement of the compartment.
• the molded layer only partially occupies the outer face of the composite layer, and not all of this face.
• This molded layer occupies, for example, less than 50% of the outer face of the layer, or even less than 25% thereof.
• the invention also relates to an electrical energy storage module comprising a plurality of battery cells in particular arranged in a row, and a compartment as described above, the cells being placed in this compartment in thermal interaction with the cooling plate.
• the invention also relates to a method of manufacturing a compartment for equipment capable of releasing heat during its operation as described above, the method comprising the step of forming a layer of base material. of polymer, with assisted injection of a fluid to form a channel in this layer.
• a further subject of the invention is a compartment for equipment capable of releasing water. heat during its operation, in particular for an electrical energy storage device for a motor vehicle, this compartment comprising at least one cooling plate arranged to be traversed by a cooling fluid and arranged to cool said equipment, this compartment further comprising an upper housing arranged to receive said electrical equipment, and a lower housing in which is placed at least one fluid connection element for supplying the cooling plate with fluid, the lower and upper housings being isolated from each other by fluid-tight manner.
• the cooling plate (s) separate the lower housing from the upper housing.
• a plurality of cooling plates separate the lower housing from the upper housing, and these plates are arranged in parallel rows.
• each cooling plate comprises a fluid inlet and a cooling fluid outlet each connected to one of the fluid connection elements, these fluid inlet and outlet are all tours in the lower accommodation.
• conduits are provided within the cooling plates for the circulation of cooling fluid.
• the bottom cover includes a coolant channel, and the fluid connection member is connected to this channel.
• the bottom cover has a substantially planar main face.
• this bottom cover defines with the cooling plates the lower housing.
• the lower and upper housings cover substantially the same area. These housings thus have a stacked arrangement.
• the bottom cover comprises at least one layer of composite material based on polymer, in particular plastic and thermoplastic.
• the lower housing has, in free space, a height of less than 25%, in particular less than 15%, of the height of the upper housing.
• a seal is disposed on a junction periphery between the lower housing and the upper housing.
• the upper housing has at least one frame, including aluminum, which defines a perimeter of the upper housing, and the seal is in contact with this frame.
• this frame comprises external bars forming a perimeter and partitions, in particular parallel to each other, to form receptacles each to receive a battery cell.
• These partitions form for example two identical rows of several receptacles.
• the cooling plates are assembled on the frame, for example by screwing or gluing.
• one or more seals are provided between these bars and partitions of this frame, on the one hand, and the lower housing, on the other hand.
• the seal (s) are disposed in a sealed manner between a zone of the frame and a zone of a cooling plate, and / or between a zone of the frame and a zone of the bottom cover.
• the seal is made of an electrically conductive material so as to participate in an electromagnetic protection function (also called EMC or Electromagnetic Compatibility) of the upper housing receiving the electrical component.
• EMC electromagnetic protection function
• the upper cover is arranged to be applied against the frame to close the compartment, in particular with the interposition of a seal, in particular of electrically conductive material.
• the invention makes it possible to have a total height of the compartment which is relatively low, which is advantageous given the size constraints.
• the compartment can also be made in a simplified manner.
• the top cover comprises a composite material based on plastic.
• the invention also relates to an electrical energy storage device comprising a plurality of battery cells, in particular arranged in a row, and a compartment according to one of the preceding claims, the cells being placed in this interacting compartment. thermal with the cooling plate.
• FIG.1 is a schematic view of a compartment according to an example of the invention, from the side,
• FIG.2 shows the compartment of [Fig.1], in section
• FIG.3 is a schematic view of a compartment according to another example of the invention.
• FIG.4 is a sectional view of the figure [Fig.3],
• FIG.5 is another schematic view of figure [Fig.4]
• FIG.6 is a sectional view of the compartment.
• FIG. 1 There is shown in Figures 1 and 2 an electrical energy storage module 1 comprising a plurality of battery cells 9, visible in Figure 2, and a compartment 2.
• This compartment 2 has two channels 3 for circulating a cooling fluid, visible in Figure 1, which are parallel.
• This figure 1 shows the lower and outer face of the compartment 2.
• This compartment 2 defines, with an upper cover not shown, a box 5 which contains the battery cells 9. The bottom of this box 5 is on this compartment 2.
• Each channel 3 is obtained by molding a polymer-based material which may optionally include reinforcing fibers, with assisted injection of a fluid, in particular assisted injection of a gas or a liquid, to form this channel 3 in the polymer material.
• the polymer-based material forms a first layer 8 of polymer material.
• Each channel 3 has an internal wall 10 without joint, as the result of the hollowing out of the polymer-based material by the fluid injected during the molding.
• Each channel 3 has a cylindrical shape, at least over part of its length, in particular with a rectangle or oval or round cross section.
• composite material is meant a material comprising at least two different materials such as plastic and metal.
• the preferred composite materials correspond to materials that are both robust and light at the same time.
• Composite materials such as a blend of a thermoplastic with reinforcing fibers are particularly suitable for such use.
• the composite material may correspond to polypropylene with glass and / or carbon fibers.
• polypropylene corresponds to a light material and the glass and / or carbon fibers reinforce the structure of the case.
• Polyamide-6 with glass fibers is also possible.
• the composite material corresponds to reinforcing fibers pre-impregnated with a thermoplastic resin.
• the first layer 8 in which and formed the channel is in the form of a layer which extends over one side of the second layer 11 of composite material.
• the second layer 11 is flat over at least part of its surface in a flat region 17.
• the first layer 8 and the second layer 11 have an inclined edge 15 with respect to this flat region 17, and the channel 3 passes into the first layer 8 on this edge 15.
• Each channel 3 in the material is connected to a fluidic connection member 27, on this inclined edge 15.
• Each fluidic connection member 27 is overmolded by the material of the first layer 8.
• Compartment 2 has a cooling plate 20 disposed on one side 21 of the layer of composite material which is opposite to side 22 of the first layer 8.
• the plate 20 is arranged to be traversed by a cooling fluid also circulating in the channels 3 of the layer.
• These channels 3 are feeder channels which respectively feed and evacuate the cooling fluid circulating in the plate 20.
• a single feeder feed channel and a single feeder outlet channel are provided.
• the plate 20 is formed of two sub-plates 24 which, once assembled, form a circulation circuit 39 of cooling fluid.
• the first layer 8 comprises connection portions 29 made in one piece with the rest of the layer and which are arranged to be connected to the cooling plate 20.
• This connection portion 29 protrudes through the layer. made of composite material and is traversed by the associated channel 3 to bring this channel 3 to the plate 20.
• This plate 20 is opposite the second layer 11.
• the first layer 8 comprises grooves 33 to form the channels and reinforcing ribs 34, in particular in the shape of a honeycomb, for the mechanical reinforcement of the compartment 2.
• the fluid for assisted injection may be water.
• the first layer 8 only partially occupies the outer face of the second layer 11 of composite material, and not all of this face. This layer occupies for example less than 50% of the outer face of the second layer 11, or even less than 25% thereof.
• Each channel 3 has a length of at least 5 cm, in particular at least 10 cm.
• the composite material of the second layer 11 comprises glass fibers, optionally as a variant of carbon fibers or of another nature, pre-impregnated with a thermoplastic resin.
• Compartment 2 has a raised edge 36 around its periphery.
• the honeycomb structure 34 is outwardly of the housing 5.
• the coolant used in this case can in particular be a liquid coolant based on carbon dioxide, such as R744 for example, 2, 3, 3, 3-tetrafluoropropene (or HFO-1234yf) or 1, 1, 1, 2-tetrafluoroethane (or R-134a).
• the coolant can also be a nanofluid.
• the coolant can still be water, possibly including additives.
• the battery cells include, for example, a plurality of lithium-ion (Li-ion) batteries for use in a hybrid vehicle.
• the plurality of battery cells are Li-ion batteries for use in a battery electric vehicle.
• the cooling plate 20 forms a heat exchanger included in a cooling circuit, not shown, of the type comprising a compressor and other heat exchangers.
• the plates are for example an assembly of two aluminum walls delimiting cooling fluid circulation ducts, taking the form of a meandering path, for example.
• Compartment 2 and battery cells 9 together with other components form an electrical energy storage device 40 for a motor vehicle.
• the first layer 8 and the second layer 11 form a bottom cover 88.
• FIG. 3 to 5 There is shown in Figures 3 to 5 a compartment 80 for battery cells 9 of a motor vehicle according to another embodiment.
• This compartment 80 comprising cooling plates 20 arranged to be traversed by a cooling fluid and arranged to cool the cells 9.
• This compartment 80 further comprises an upper housing 81 arranged to receive the cells 9, and a lower housing 82 in which are placed fluid connection elements 83 for supplying the cooling plates 20 with fluid.
• the lower 82 and upper 81 housings are insulated from each other in a fluid-tight manner.
• the cooling plates 20 separate the lower housing 82 from the upper housing 81, as can best be seen in Figures 4 and 5.
• a plurality of cooling plates 20 separate the lower housing 82 from the upper housing 81, and these plates 20 are arranged in parallel rows.
• Each cooling plate 20 has a fluid inlet 84 and a coolant outlet 85 each connected to one of the fluid connection elements 83, these fluid inlet and outlet 84 and 85 are all turned in the lower housing 82. [100] Thus in the event of a leak at these inlet and outlet 84 and 85, the cooling fluid flows into this lower housing 82 and not into the upper housing 81 so as to preserve the battery cells.
• Ducts are provided within the cooling plates for the circulation of cooling fluid 20.
• the compartment 80 has a bottom cover 88 comprising coolant channels 3 like those described in the previous example.
• the fluid connection elements 83 are connected to these channels 3 being for example formed by an extension of material which also forms the channels 3. These channels 3 are produced by assisted injection of fluid into the first layer 8 of material in polymer, as described in the previous example.
• the bottom cover 88 has a substantially planar main face 89.
• This bottom cover 88 defines with the cooling plates 20 the lower housing 82.
• the lower 82 and upper 81 dwellings cover substantially the same area. These housings 81 and 82 thus have an arrangement stacked vertically when the assembly is mounted on the vehicle.
• the bottom cover 88 comprises a layer of composite material based on polymer and more particularly plastic and thermoplastic.
• the lower housing 82 has, in free space, a height h less than 25%, in particular less than 15%, of the height H of the upper housing.
• Seals 90 are arranged on a junction periphery 91 between the lower housing 82 and the upper housing 81.
• the upper housing 81 comprises an aluminum frame 93, which defines a periphery 95 of the upper housing, and the seal 90 is in contact with this frame 93.
• This frame 93 comprises external bars 94 forming a perimeter and partitions 96, which forms a grid, to form receptacles 97 each to receive a battery cell. These partitions 96 form for example two identical rows of several receptacles 97. [112]
• the bars 94 are in particular in a honeycomb structure. These bars are made of steel or aluminum, for example.
• the cooling plates 20 are assembled on the frame 93, for example by screwing or gluing.
• the seals 90 are provided between these bars 94 and partitions 96 of this frame, on the one hand, and the lower housing 82, on the other hand.
• the gaskets 90 are disposed in a sealed manner between a zone of the frame 93 and a zone of a cooling plate 20, and / or between a zone of the frame 93 and a zone of the cover background 88.
• Each seal 90 is made of an electrically conductive material so as to participate in an electromagnetic protection function of the upper housing 81 receiving the cells.
• An upper cover 98 is arranged to rest against the frame 93 to close the compartment, with the interposition of seals 90.
• the top cover 98 comprises a composite material based on a polymer material, and in particular has a substantially flat shape.
• the feeder channels 3 are in particular turned towards the lower housing 82.
• the invention relates to the sealing of the compartment 2.80 and in particular the sealing of the bottom cover 88.
• the bottom cover 88 corresponds to a multilayer structure comprising at least one layer 100 of composite material and an additional layer 102 of unreinforced polymer material.
• the additional layer 102 of unreinforced polymer material corresponds for example to plastic or other thermoplastic without any reinforcing fiber.
• the additional layer 102 is preferably impermeable to the cooling fluid in order to guarantee the tightness of the bottom cover 88.
• the additional layer 102 is made, or made from, a material impermeable to a liquid refrigerant such as R744, HFO-1234yf, R-134a or even water.
• unreinforced polymer material is meant a preferably thermoplastic material having no reinforcing fiber.
• the polymer, in other words the thermoplastic, of the additional layer 102 is the same as that of the layer 100.
• affinity is possible between different polymers, for example chemically compatible polymers, or else polymers linked by forming a complex or by a preliminary treatment of the first and second layer, or both at the same time.
• the bottom cover 88 may further include other layers.
• the bottom cover 88 may include a layer corresponding to a fire barrier 104.
• the fire barrier 104 is formed by one of the following:
• an anti-fire film in particular plastic, in particular thermoplastic, with appropriate additives,
• a layer comprising aramid for example a woven layer
• the fire barrier 104 is a layer integrated into the multilayer structure of the bottom cover 88.
• the fire barrier 104 is formed at the same time as the other layers 100,102 of the multilayer structure, for example.
• the bottom cover 88 may include a plurality of layers.
• the bottom cover 88 may comprise two layers 100 of composite material and two additional layers 102 of unreinforced polymer material, optionally with a fire barrier 104 arranged centrally between these four layers.
• the bottom cover 88 may comprise a layer 100 of composite material and two additional layers 102 on either side of this layer 100, optionally with a fire barrier layer. 104.
• the outer layer of the bottom cover 88 that is to say the layer facing the bottom of the vehicle, or the layer facing away from the battery cells 9, ie an additional layer 102. It is also possible in the context where there are two additional layers 102 that the outer layer and the inner layer, c 'that is to say the layer facing the battery cells 9, are both additional layers 102 of impermeable non-reinforced polymer material.
• a second fire barrier 104 is provided in the form of an inner layer of the compartment 2.80, in particular a layer facing the battery cells 9 to be housed. in said compartment.
• two fire barriers 104 can be provided on both sides, interior and exterior, of the compartment 2.80 so as to reinforce the fire protection of the compartment 2.80.
• the fire barrier 104 extending over the entire back wall, especially on the outside thereof.
• the second layer 11 corresponds to the first layer 100 and the first layer 8 corresponds to the additional layer 102.
• top cover 98 has the same multilayer structure as the bottom cover 88J

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• 2019
  • 2019-12-17 FR FR1914643A patent/FR3104832B1/fr active Active
• 2020
  • 2020-12-02 EP EP20828032.1A patent/EP4077011A1/de active Pending
  • 2020-12-02 CN CN202080083533.4A patent/CN114761268A/zh active Pending
  • 2020-12-02 WO PCT/FR2020/052252 patent/WO2021123538A1/fr unknown
  • 2020-12-02 US US17/785,477 patent/US20230012599A1/en active Pending

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