EP3847714A1 - Electric module comprising a plurality of battery cells submerged in a dielectric fluid - Google Patents
Electric module comprising a plurality of battery cells submerged in a dielectric fluidInfo
- Publication number
- EP3847714A1 EP3847714A1 EP19774165.5A EP19774165A EP3847714A1 EP 3847714 A1 EP3847714 A1 EP 3847714A1 EP 19774165 A EP19774165 A EP 19774165A EP 3847714 A1 EP3847714 A1 EP 3847714A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dielectric fluid
- module
- pressure
- electric module
- module according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
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- 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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
-
- 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
- H01M10/656—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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
-
- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- 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
-
- 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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/643—Cylindrical cells
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- 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
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- 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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/667—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an electronic component, e.g. a CPU, an inverter or a capacitor
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- 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
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- 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
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- 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 battery pack having an optimized thermal management system in which a temperature-controlled fluid comes into direct contact with the battery cells. It applies in particular, but not exclusively, in the automotive field. It applies for example to the traction batteries of electric vehicles (VE) and hybrid electric vehicles (VEH).
- VE electric vehicles
- VH hybrid electric vehicles
- a lithium-ion (Li-ion) type electrochemical cell battery module regularly undergoes charging and discharging phases, causing heating which can be significant.
- This electrochemistry also has a reduced operating temperature range, typically between 0 and 45 ° C for charging and -20 ° C and 60 ° C for discharging. Cell aging increases when the cell temperature deviates from an ideal operating temperature, typically 25 ° C.
- Patent application W02014176320A2 discloses a known battery comprising an enclosure partially filled with a liquid-vapor phase change material (“LV phase change material” for “Liquid-Vapor Phase Change Material” according to the Anglo-Saxon name, like water or alcohol for example) and hermetically sealed under vacuum.
- LV phase change material for “Liquid-Vapor Phase Change Material” according to the Anglo-Saxon name, like water or alcohol for example
- Prismatic electrochemical cells are arranged vertically at the bottom of the enclosure, so that one edge of each cell dips in the phase change material in the liquid phase.
- the envelope of each cell is covered with a fine hydrophilic structure allowing the liquid phase change material to soak the entire envelope by capillary action.
- phase change material passes from the liquid phase to the vapor phase by heating in the hydrophilic structure, when the cells are functioning (during the charges and discharges).
- Different solutions are proposed there for recondensing the phase change material, so that the phase change material drops in drops on the cells covered by the hydrophilic structure.
- the cells "bathe” in the liquid phase change material despite the small amount of phase change material in the enclosure.
- patent application EP2806481 describing a submerged battery which comprises a housing defining a receiving space, a electrically insulating liquid contained in the reception space, a battery unit installed in the reception space, and an electric power control unit installed in the reception space and electrically coupled to the batteries.
- the battery unit includes a plurality of spaced apart battery cells, at least a portion of each of which is immersed in the electrically insulating liquid.
- the electrical power control unit has two output terminals that exit from the housing and supply electricity to the batteries.
- patent application EP3166175 describing an electric battery comprising a plurality of electrical energy storage cells each comprising a positive terminal and a negative terminal, the cells being arranged in a housing containing a dielectric liquid; inside the housing, a controllable stirring device for circulating the dielectric liquid in contact with the positive and negative terminals of the cells; and a management device adapted to detect a possible failure of a cell and to consequently control the stirring device to modify the conditions of circulation of the dielectric liquid in the housing.
- Patent application US2012242144 describes another known example of a vehicle battery comprising battery cells with an integrated control circuit configured to communicate with a battery energy control module.
- the major drawback of the solutions of the prior art is the need to keep the air vacuum in the enclosure throughout the life of the battery, which is very difficult to guarantee given the many cables. Indeed, if the air enters the enclosure, then the pressure increases there to the detriment of the phenomena of evaporation / condensation of the phase change material, decreasing the cooling performance.
- the system must therefore be designed in such a way that it is doubly airtight: it prevents air from entering cold and prevents steam from leaving hot.
- a battery pack is bulky, it is generally of flat shape to facilitate its integration and the upper part of its external walls has a large surface area. Consequently, a pressure differential between the interior and the exterior generates forces and possibly significant deformations. Consequently, the walls of the enclosure must be thick and rigid enough not to deform, which increases the weight of the pack.
- a final drawback of the state of the art relates to the cooling of peripherals such as busbars, connectors and the electronic battery management circuit, in particular the resistances of the circuit for balancing the cell voltages of batteries.
- peripherals such as busbars, connectors and the electronic battery management circuit
- these components heat up and limit the use of the battery.
- the calibration at various temperatures of electronic circuits is a long and costly step in their development. Keeping electronic circuits within a limited range of temperatures is also desirable to reduce their aging.
- the solutions implemented in the invention consist in including all of the components peripheral to the battery cells inside the sealed enclosure, by immersing them in a dielectric fluid, all or part of this fluid being always liquid. So the circuits electronics, busbars and connectors are cooled. In addition, the number of interfaces with the outside of the enclosure is considerably reduced, which facilitates the implementation of the sealing of the enclosure.
- the connectors developed are particularly sealed against liquids and gases.
- the system implemented in the invention has an expansion tank provided with a deformable membrane.
- the side which is not in contact with the partially or fully liquid dielectric fluid defines a chamber whose pressure is controlled by a valve which either equalizes the pressure of the chamber with atmospheric pressure, or connects the chamber with a vacuum pump which, once activated, pumps the air contained in the chamber in order to reduce the pressure of the chamber under the saturation pressure of the dielectric fluid at its operating temperature. Therefore, it is possible to force a pressure equal to atmospheric pressure during system downtime for example, to limit the entry of air into the system.
- the dielectric fluid used can be chosen so as to have a saturation temperature at atmospheric pressure outside the operating temperature range, in particular above, so that the difference between the internal and external pressure does not change. sign, in particular that it remains negative (enclosure under vacuum), which simplifies the sealing solutions to be implemented at the enclosure. Finally, such an enclosure, always under vacuum, undergoes a pressure differential limited to 1 barG, which lightens the structure of the enclosure. Subject of the invention
- the invention relates to an electrical module comprising a plurality of battery cells immersed in a dielectric fluid, characterized in that it also comprises an electronic battery management circuit, immersed in said dielectric fluid.
- the module according to the invention also has one or more of the following additional characteristics, taken individually or in combination:
- the module housing has on its inner wall a housing immersed in said dielectric fluid, said electronic battery management circuit being disposed in said housing.
- the plurality of battery cells is assembled to form a block, said electronic battery management circuit being fixed on said block.
- the electronic battery management circuit is arranged so that the normal to the plane defined by said electronic circuit is substantially horizontal.
- the electronic battery management circuit is connected with an external socket via a waterproof connector passing through the wall of the housing of said module.
- the module comprises at least two electrical terminals sealingly passing through the wall of the housing of said module, the inner part of said electrical terminals being immersed in said dielectric fluid.
- the module comprises a contactor for switching off said battery, said contactor being immersed in said dielectric fluid.
- the module comprises at least one temperature sensor immersed in said dielectric fluid.
- the module includes a current sensor immersed in said dielectric fluid.
- the module includes bus bars immersed in said dielectric fluid.
- the electronic circuit includes a circuit for balancing the voltages of battery cells immersed in said dielectric fluid.
- FIG. 1 shows an exploded view of an embodiment of a battery module according to the invention.
- Figures 3 and 4 show respectively top and bottom views of the cover.
- FIG. 5 represents a detailed view of the cover with an attached exchanger.
- FIG. 6 and 7 show a variant module for which the housing is constituted by a flexible envelope.
- FIG. 8 shows an alternative embodiment of the module containing pocket cells.
- FIG. 13 shows the integration of one of the thermal management systems of a battery with other thermal management functions.
- FIG. 14 shows a detailed sectional view of an airtight electrical connector.
- FIG. 15 shows an alternative embodiment of the assembly of cells with prismatic cells.
- FIG. 16 shows an alternative embodiment of the module with the circulating dielectric fluid.
- the module (1) described in Figure 1 consists of an enclosure formed of three main parts:
- a block of batteries (400) arranged horizontally, on two parallel planes, offset by half a step.
- the module (1) forms a hermetically sealed enclosure, defining a free interior volume (that is to say the interior volume of the enclosure subtracted from the volume of the battery pack (400)) divided into:
- liquid is always present in normal operation and typically represents between 10 and 100% of the free interior volume .
- an upper part (150) exclusively filled with gas, that is to say the vapor in thermodynamic equilibrium with the liquid phase of the dielectric fluid (140) and, optionally, non-condensable gases in addition such as nitrogen. This part can be reduced to zero.
- the enclosure forms a rigid and robust component, which includes:
- the heat transfer fluid (145) circulates in an exchanger (236 or 237) contained in the module (1) to control the temperature inside it.
- this exchanger (236) is contained in the cover (200).
- it is a separate part (237).
- the heat exchanger is offset outside the module (1) and it is the dielectric fluid (140) which flows out of the module (1) towards a heat exchanger.
- the hydraulic inlet and outlet ports (210, 220) are used for the circulation of the dielectric fluid (140).
- the cover (200) can act as an exchanger (236) if it has fins inside and it can be cooled by air, moved by a fan outside the module and blowing on the cover (200) provided with fins on the outside.
- the dielectric fluid (140) has the following characteristics:
- low global warming potential preferably less than 150, or even less than or equal to 20.
- the dielectric fluid (140) is not air. It is a fluid which has a liquid phase at atmospheric pressure over the range of operating temperatures defined below.
- the dielectric fluid (140) can have a boiling temperature at atmospheric pressure (Tsat (Patm)) which varies:
- Tmin Tsat (Patm) Tmax there is a boiling point for which the fluid is at atmospheric pressure within the range of use of the product.
- the saturation pressure of the fluid varies below and above atmospheric pressure as a function of the temperature.
- the interior of the module (1) is either in depression or in overpressure depending on the temperature. It may then be advantageous to have a deformable balloon (160) inside the module (1), connected to a reference pressure, for example open to the atmosphere, so that the balloon inflates in the event of depression in the module (1) to avoid operating under vacuum and maintain a pressure substantially equal to atmospheric pressure by ensuring that the liquid volume of the dielectric fluid (140) is equal to the interior volume of the module (1) minus the volume of the balloon (160) swollen. Then the internal pressure in the module (1) is between atmospheric pressure and saturation pressure at the maximum operating temperature.
- the pressure in the module is the sum of the partial pressure of the gas and the saturation pressure of the dielectric fluid (140). It is then possible to adjust the partial gas pressure during filling of the module (1) in order to be overpressure over the entire operating range, in particular at Tmin.
- the internal pressure of the module is between a lower bound, equal to the saturation pressure at the minimum use temperature to which is added the pressure of the mass of gas at the minimum use temperature and to the volume of the gaseous upper part (150), and an upper bound equal to the saturation pressure at the maximum use temperature to which is added the pressure of the mass of gas at the maximum use temperature and to the volume of the upper part gas (150).
- Tmax The saturation pressure of the fluid when using the product is always lower than atmospheric pressure.
- the pressure inside the module (1) is always less than atmospheric pressure and equal to the pressure of saturation of the fluid dielectric at operating temperature
- the cells (414) of batteries heat by the Joule effect. Indeed, subjected to a current, their internal resistance in particular produces heat, whose power is equal to the internal resistance multiplied by the intensity squared. Therefore, the dielectric fluid (140) inside the module (1) undergoes a heating cycle then isochoric cooling. In contact with the cells (414) of batteries in operation, it heats up by cooling the cells (414). Then it transports this heat to the exchanger (236 or 237) to transfer it to it.
- the dielectric fluid (140) remains in the liquid phase. It “rises” (vertical movement upwards) towards the exchanger (236 or 237) by natural convection, its density being lower than that of the cold dielectric fluid. If it comes into contact with said exchanger, it cools and "descends" towards the bottom of the module (1) thus forming a convection cell.
- the ratio between the lower volume, the upper volume (150) and the volume of the possible tank (160) vary, the cumulative volume, representing the interior of the module (1), remaining unchanged.
- the housing does not allow any circulation of the liquid phase of the dielectric fluid (140) towards the outside of this enclosure, outside the filling phases, nor any circulation of the gas phase of the dielectric fluid (140).
- the liquid phase of the dielectric fluid (140) is generally static, without displacement of the liquid phase under the effect of a pump or of a stirring means or of forced circulation.
- the only displacements of the liquid phase are those resulting from the natural phenomena of convection and circulation of the bubbles of the gas phase and of the vibrations caused by the support of the module (1). It may be interesting to work only under vacuum to reduce the maximum pressure difference seen by the module (1), which makes it possible to lighten the structure of the housing.
- the housing (100) consists of a hollow profile, preferably made of aluminum, optionally having reinforcing ribs making it possible to optimize the thickness (and therefore the weight) with respect to the resistance to pressures or depressions forming at inside the enclosure.
- the upper edge (171) and the lower edge (172) have grooves respectively (173, 174) to receive a seal (175, 176) ensuring the seal with the cover (200) and the bottom (300) respectively.
- This seal can be an O-ring or flat.
- the bottom (300) is formed by a sheet of aluminum or stainless steel hermetically closing the lower part of the housing (100).
- the housing (100) can also directly integrate the base (300) in a single piece, said housing can then be produced by a foundry process for example.
- This solution makes the O-ring (176) and the bottom fixing lugs obsolete.
- the housing (100) can be made of plastic or composite material.
- the housing presented in the example describes four fixing lugs (180) for the connection with the module support (1), as well as two handles (190, 191) for handling the module. These handles (190, 191) have a height greater than the height of the connectors (110, 120) to ensure the mechanical protection of the latter.
- the housing also has in the example described four tapped holes on the front (181) for the connection with the module support or for mounting the module (1) in a bay, for example on a 19-inch bay.
- the electrical connectors (110, 120, 130) have a sealed base to prevent the fluid dielectric (140) to be able to escape from the module (1) in the event of overpressure or for air to enter the module (1) in the event of vacuum.
- the pressure differential between the interior of the module (1) and the atmosphere does not change sign. It is in fact more complex to design a module which is hermetic both in depression and in overpressure.
- the dielectric fluid (140) used has a Tsat (Patm) in the operating range then it may be advantageous to use a balloon (160) of variable volume.
- the module (1) comprises a flexible balloon (160), immersed in the lower part of the fluid (140).
- the balloon (160) has an opening (161) connected to the outside.
- the opening (161) being always open during the operation of the module (1), the interior of the balloon (160) is constantly connected to the external pressure. Therefore, the balloon (160) inflates when the internal pressure of the module (1) decreases, which happens when the internal temperature passes under the Tsat (Patm).
- Tsat Tsat
- the upper gaseous part (150) is reduced to zero, there is therefore no longer a liquid-vapor equilibrium in the module (1) and the pressure of the liquid - then sub-cooled - is maintained substantially equal to atmospheric pressure.
- the balloon (160) deflates when the internal pressure of the module (1) increases, during a heating of the interior of the module (1) for example; its volume is then reduced to zero. Therefore, the balloon (160) constitutes to some extent a means of regulating the internal pressure of the module (1) vis-à-vis the outside. Said pressure regulation improves the hermeticity of the housing, the seals being less stressed by variations in pressure. Said balloon (160) also makes it possible to simplify the procedure for filling the module (1) with fluid (140), by avoiding having to evacuate the module (1) before filling. Indeed, in order to avoid any degradation of the dielectric fluid (140) with the water and the oxygen contained in the air, the module (1) must not contain air.
- the balloon (160) is kept inflated by an external pressure source.
- the module (1) is then completely filled to its highest point by the dielectric fluid (140), the upper volume (150) in the gas phase of this fluid not existing.
- the module (1) is then hermetically sealed, then the pressure inside the balloon (160) is released.
- the balloon (160) remains inflated and the volume greater (150) does not exist. There is therefore no air in the module (1).
- the cells (414) start to heat and the dielectric fluid (140) begins to evaporate, the pressure rises, the balloon (160) deflates and the upper volume (150) of gas sees its volume increase.
- the cover (200) will then play its role of condenser, the cooling fins (235) being in contact with the gas.
- the volume of the balloon (160) is at least equivalent to the volume of gas contained at the level of the cooling fins (235). Consequently, when the balloon (160) is fully deflated, the upper volume (150) is such that the cooling fins (235) are entirely in the volume of gas. The efficiency of this cooling system is then maximum.
- FIG. 3 and 4 show detailed views of the cover, respectively in exploded view from above and in view from below.
- FIG. 5 represents a detailed view of the cover with an attached exchanger.
- the cover (200) consists of a solid block (230) of aluminum obtained by machining or foundry.
- This block (230) has on its lower face cooling fins (235) arranged longitudinally, along the longest axis of the cover (200).
- These fins (235) have a thickness of between 2 and 5 millimeters. They are regularly spaced at least 5 millimeters apart, in order to avoid the formation of liquid bridges between two fins during the condensation of the dielectric fluid.
- the height of the fins (235) is between 5 and 15 millimeters.
- These fins (235) define heat exchange surfaces with the heat transfer fluid exchanger (236) (145) on the one hand, and the gas phase present in the upper volume (150) on the other hand.
- the cooling circuit exchanger (236) is formed on the opposite surface of the solid block (230). It is constituted by a machining forming a coil opening on a hydraulic inlet port (210) and opening into a hydraulic outlet port (220).
- this coil is closed by a sheet (239) screwed by its periphery onto said solid block (230).
- this sheet (239) can be welded to the edges of the coil, or glued.
- the cooling circuit (236) previously described can be replaced by an exchanger (237) between heat transfer fluid (145) and dielectric fluid (140), the heat transfer fluid (145) then circulating in an exchanger ( 237), which can be of the fin or brazed plate type.
- an exchanger 237)
- the sheet (239) is always necessary in order to close the module (1) and to ensure its airtightness.
- said exchanger (237) can be integral with said sheet (239), in particular in the case of a brazed plate heat exchanger and an aluminum sheet.
- the cover (200) has a through hole in which is housed a safety valve (240) or a bursting disc, opening in the event of overpressure in the enclosure, to allow part of the gaseous phase to escape (150 ) dielectric fluid (140) and the gases produced, for example during thermal runaway of the batteries, and avoid the risk of explosion of the module (1).
- a temperature sensor near the valve (240) detects the overheating and transmits the information to the battery management module which will prevent use from module to refurbishment.
- the dielectric fluid In the event of thermal runaway, the dielectric fluid will first evaporate by absorbing the heat emitted by the faulty cell and be evacuated by the valve. The large amount of energy contained in the evaporation of the fluid will prevent the rise in temperature and contagion to other cells.
- the cover (200) also has holes (290) opening into the bottom of the coil (236). These holes (290) are closed by fusible lids at a temperature above 80 ° C. In case of fusion of these lids during overheating due to thermal runaway, the coolant escapes from the cooling circuit to fill the enclosure and thus ensure additional cooling of the cell (414) in thermal runout for avoid contagion to other cells.
- the housing encloses the battery pack (400) which is completely immersed in the liquid phase of the dielectric fluid (140).
- the battery cells (414) are interconnected in series, in parallel or in series-parallel by plates (401), called bus-bars, formed by a conductive material which can be coated locally with an insulating layer. They are held in a cage formed by two frames (411, 412) connected by spacers (413).
- the plates (401) being immersed in the liquid dielectric fluid (140), these have the same type of evaporative cooling as the cells (414). Consequently, said plates can be undersized because they do not fear excessive heating, which is advantageous for the compactness, the weight and the price of the module.
- the battery pack (400) can be fixed in the case using plates (260, 261) surrounding the frames (411, 412) from above and fixed by screws .
- the battery pack (400) can also be fixed to its base via plates (262 to 264) fixed to the bottom (300) of the module (1).
- the housing also encloses an electronic circuit (420) for managing the batteries, also completely immersed in the liquid phase of the dielectric fluid (140).
- the immersion of this electronic card (420) allows its cooling and in particular the cooling of the balancing resistors used when charging the cells (414). These can then easily admit a much higher balancing current to reduce the duration of the terminal cell charging phase (414).
- These resistors like many power electronics components, have a particularly high surface heat flux which can go up to 250 kW / m 2 .
- the diphasic immersion provides a relevant response allowing to exceed such flows with only ten degrees of temperature rise compared to the temperature boiling point of the dielectric fluid (140).
- said electronic circuit (420) for managing the batteries can be mounted outside the module (1), and therefore outside the dielectric fluid (140). In this case, the temperature and cell voltage information (414) must be transmitted through a sealed bulkhead connector.
- the housing can also enclose other peripheral components: electrical connectors, temperature and pressure sensors, contactors, current sensors and various cables also immersed in the liquid phase of the dielectric fluid (140) in order to ensure their cooling too.
- the assembly formed by the battery pack (400), the busbars (401), the electronic circuits (420) and all the peripheral components mentioned above is called the cell assembly (402).
- FIG. 15 a variant of this cell assembly (402) using prismatic cells is illustrated.
- FIG. 8 only the battery pack (400) with cells (414) of the “pocket” type is illustrated.
- the electrical connectors (110, 120, 130) have a hermetic base in order to prevent the dielectric fluid (140) from being able to escape from the module (1) in the event of overpressure or air from entering the module ( 1) in case of depression.
- the hermeticity of these connectors (110, 120, 130) can be ensured by overmolding the metal parts.
- the material used for this overmolding is chosen from the materials compatible with the dielectric fluid used.
- the materials to be favored for overmolding are epoxy resins.
- the tightness of these connectors (110, 120, 130) can also be secured by an O-ring located inside the connector.
- the material used for this seal is chosen from the materials compatible with the dielectric fluid used.
- the fluid chosen is Chemours' SF33
- the materials to be favored for the joint are those based on EPDM (ethylene-propylene-diene monomer).
- sealing cap can be mounted inside the power connectors (110, 120) standard, not gas-tight in particular.
- Said sealing cap is composed of a cylindrical part made of a conductive material (112), said part being directly screwed onto the male pin (121) of the electrical connector (110, 120).
- Said male pin (121) is, in the example of Figure 14, directly molded into the body of the base (122) of insulating material. Current flow is provided by an annular contact surface (117) located between the conductive cylindrical piece (112) and said male pin (121).
- This annular surface (117) also serves as a mechanical stop when the conductive part (112) is screwed onto the spindle (121).
- the contact pressure and the contact surface are chosen in order to obtain a very low electrical contact resistance to avoid a voltage drop and overheating at this location. A typical value not to be exceeded is 2 mOhms.
- the conductive cylindrical part (112) comprises a threaded part (118) around which the internal connections are screwed.
- the cap (111) is also composed of a cylindrical insulating part (113) allowing the conductive cylindrical part (112) to remain at a distance from the wall of the case (100) and avoid any risk of electric arc.
- the insulating part (113) also includes two O-rings (114, 115) to guarantee the tightness of the cap (111) under significant internal pressure.
- the box encloses several blocks of insulating material (250 to 256), of thickness which can typically vary between 3mm and 20mm. Said blocks make it possible in particular to provide electrical insulation between the battery block (400) and the metal parts of the case. Said blocks also make it possible to maintain the battery block (400) in the event of an impact.
- the volume of said blocks (250 to 256) is maximized to reduce the free volume, especially wherever the presence of the dielectric fluid (140) is not required. Indeed, part of the free volume of dielectric fluid comes from manufacturing and assembly constraints of the module which limit the achievable shapes.
- the components requiring cooling have a spacing with the blocks (250 to 256) typical of 1 to 5mm to allow the dielectric fluid (140) to pass.
- the blocks (250 to 256) therefore have shapes on their inner faces that best match the parts they surround, while providing this spacing.
- This maximization of the volume of the blocks (250 to 256) is motivated by the reduction of the volume of dielectric fluid (140) in order to minimize the weight, the material constituting the blocks (250 to 256) being advantageously lighter than the dielectric fluid (140 ) that it replaces. This maximization is also motivated by the cost, the dielectric fluid (140) being more expensive than the blocks (250 to 256).
- Said blocks (250 to 256) are chosen from a material compatible with the dielectric fluid (140).
- the blocks of expanded foam based on polyurethane are preferred.
- the materials are also closed cell, so that they avoid absorbing the dielectric fluid (140). It is important that the foam is obtained using a blowing agent compatible with the dielectric fluid (140), or even the dielectric fluid itself.
- SF33 is used as an expanding agent for polyurethane foams, it can also be used as a dielectric fluid for two-phase cooling by immersion of batteries.
- a resin may be used to provide electrical insulation between the battery pack (400) and the metal parts of the case.
- the foam may be deposited in the module (1) by a foaming process using a counterform:
- a first step consists in positioning the counterform in the enclosure of the electrical module
- a second step consists in injecting the still liquid foam into the internal space defined between the enclosure of the electrical module and the counterform,
- a third step consists in removing the counterform once the foam has hardened (250 to 256),
- a fourth step consists in positioning the assembly of cells (402), composed of a battery pack (400), busbars (401), connectors (110, 120, 130), sensors and circuits electronic (420), in the assembly composed of the module (1) and the hardened foam (250 to 256).
- the counterform is shaped so that the assembly of cells (402), composed of a battery pack (400), busbars (401), connectors (110, 120, 130), sensors and electronic circuits (420) can be positioned during the fourth step while providing, outside of areas of mechanical contact between the cell assembly (402) and the enclosure (100, 200, 300), a space between the cell assembly (402) and the foam (250 to 256), of typical thickness between 1 and 5mm.
- the counterform ideally occupies all of the free volume of the dielectric fluid which is unnecessary for cooling. In practice, constraints linked to the mounting of the cell assembly in the case limit the shape of this counterform.
- the cooling system consists of a cold source, a circulation pump (704) of the heat transfer fluid (145) circulating in a closed circuit, supplying one or more modules (1) with the coolant (145).
- the heat transfer fluid (145) can be a mixture of deionized water and ethylene glycol in a proportion of 50% to prevent the fluid from freezing at low temperatures, while retaining good thermal properties.
- any non-flammable heat transfer fluid (145) with high sensitive heat and low viscosity can be used: propylene glycol, special oils.
- the cold source is a radiator (701), preferably ventilated by a fan (702), capable of removing heat from the heat transfer fluid (145) in the ambient air.
- This embodiment is suitable for applications where the ambient air does not exceed approximately 30 ° C, and preferably 25 ° C, in order to limit the temperature of the cells (414) in the module (1), for example around 40 ° C maximum.
- the temperature of the cooling circuit strongly depends on the power dissipated in the module (1) and on the ambient temperature, with the consequence of favored use in applications with slightly variable battery power in order to avoid its thermal cycling.
- the supply of several modules (1) by the heat transfer fluid loop (145) can be carried out in series or in parallel, or by a combination of the two.
- the number of modules (1) in series will be chosen, on the one hand equal to at least 2 in order to limit the required flow rate of the pump (704), and on the other hand equal to 3 at most to limit the pressure required from the pump (704) and 1 heating of the heat transfer fluid (145) through the modules (1).
- the number of modules in parallel will preferably be between 2 and 8.
- the heat transfer fluid circulation pump (704) (145) can advantageously be regulated in rotation speed and controlled by the cooling needs of the modules (1) in order to improve the energy efficiency of the complete system.
- the radiator (701) could advantageously be equipped with a fan (702) regulated in rotation speed, with the same energy efficiency objective as described above.
- the cold source consists of the evaporator (708) of a vapor compression refrigeration system (703), of the type used for air conditioning the passenger compartment of vehicles .
- This type of system consists of an evaporator (708), a compressor (705), a condenser (706) and a pressure reducer (707) connected by pipes allowing the circulation of a refrigerant fluid ( 709) in closed loop.
- Said fluid (709) can for example be an HFC such as R134a, or an HFO such as R1234yf, R1234ze, R1233zd.
- the production of cold from the evaporator (708) is used to lower the temperature of the heat transfer fluid (145), if necessary to a value lower than that of the ambient air, which makes it possible to control the temperature in the module (1 ) to a predetermined value, and in particular to limit it - for example to 40 ° C. maximum - whatever the fluctuations in power dissipated in the module and the ambient temperature of the application.
- the refrigeration system (703) may also be reversible. It can thus, in heating mode, supply heat to reheat the modules (1) whose performance under load in particular is affected for temperatures typically below 0 ° C.
- the compressor (705) of the refrigeration system will advantageously be chosen from air conditioning compressors used in electric vehicles, which are mainly made of aluminum alloys, and are designed to be directly supplied with direct current from a battery.
- These compressors being equipped with a variable speed drive, they allow on the one hand a better energy efficiency by adjusting the cooling capacity of the refrigeration system (703) to the just need of the modules (1), and on the other hand to reach high maximum powers when operating at maximum speed.
- the temperature range targeted for the thermal regulation of the batteries makes it possible to raise the level of evaporation temperature beyond 15 ° C, even up to 30 ° C, and thus increase the cooling capacity developed by the compressor. (705) compared to conventional use in air conditioning: specific powers of around 1.5 kW refrigeration per kilogram of compressor can thus be achieved.
- an evaporator (708) made of aluminum alloy can be used, preferably of the brazed plate type in order to reduce the internal volume on the heat transfer fluid side (145).
- the heat transfer fluid loop (145) is adapted to distribute to the modules (1) the cooling power generated at the evaporator (708), in particular when several modules of a battery pack are to be supplied and are located at a certain distance from it.
- the heat transfer fluid loop (145) can be omitted, the module cooling circuit (236) then serving directly as an evaporator (708) for the refrigeration system (703 ).
- This type of arrangement is particularly suitable for cooling a single module (1), or a limited number of modules (1) to be cooled in order to limit the charge of refrigerant (709) required and the complexity linked to the management of several evaporators in parallel in a refrigeration system (703).
- the refrigeration system (703) it is possible to limit the consumption of the refrigeration system (703) by mounting the latter in parallel with the radiator (701) of the heat transfer fluid loop (145). It is also possible to remove the heat transfer fluid loop (145) as shown in Figure 12 by circulating the dielectric fluid (140) from the module (s) (1) to the radiator (701). The refrigeration system (703) in parallel then makes it possible to heat the dielectric fluid (140) before it enters the radiator (701) to cool it more easily by increasing the temperature difference with the air and also makes it possible to cool. the dielectric fluid (140) at the desired temperature just after the radiator (701).
- Such an arrangement makes it possible to actuate the refrigeration system (703) only when a threshold temperature on the return of the fluid dielectric (140) is exceeded, thereby reducing the consumption of the refrigeration system (703) when the power of the battery is low, or when it has time to cool between two uses, or when the ambient temperature is low.
- the elimination of the heat transfer fluid loop (145) also makes it possible to eliminate the stacking of temperature differentials between the cold source and the cells which adversely affect the energy efficiency of the cooling. This solution is to be preferred for demanding on-board applications which must be autonomous in cooling for its on-board weight and its energy efficiency.
- a module variant is presented in FIG. 16. In this, the exchanger (236) is eliminated and the hydraulic inlet and outlet ports (210 and 220) are used by the dielectric fluid (140).
- Figure 13 shows the integration of one of the thermal management systems of a battery with other thermal management functions, for example those of electronics (712), electric motors (711) and the system. for heating, ventilating and air conditioning (710) the cabin of a vehicle.
- the electronics (712) can be constituted by the battery safety management system (BMS) but also the power supply electronics of an electric motor.
- BMS battery safety management system
- the heating, ventilation and air conditioning system (710) is connected to a second evaporator (7080) in parallel with one evaporator (708) which is connected to the dielectric fluid loop (140).
- the flow in this second evaporator (7080) is controlled by a second regulator (7070).
- the refrigeration system (703) is controlled to regulate a sub- cooling at the inlet of the pump (704) to avoid cavitation and to use the refrigeration system (703) only to the minimum in order to limit its consumption.
- a pressure sensor (P) and a temperature sensor (T) positioned upstream of the pump are required.
- a typical target subcooling is less than 5 ° C below the saturation temperature at the measured pressure.
- the second control algorithm controls the speed of rotation of the fan (702) so that the difference between the temperature (T2) of the dielectric fluid (140) at the outlet of the radiator (702) and the ambient temperature (T3) is less than a value varying between 1 and 8 ° C depending on the use of the application, for example charging or discharging, vehicle running or stopped, etc.
- a system for reducing the vacuum in the dielectric fluid loop (140), especially when the system is not in operation is used in particular when a fluid having a Tsat (Patm) lower than the maximum temperature seen by the system is used.
- An expansion tank (713) with internal membrane is connected to the dielectric fluid circuit (140).
- This expansion vessel (713) is controlled by an air pressure regulated by a valve (714).
- the membrane is pressed against the bottom of the vase (713) and the dielectric fluid is drawn into the vase (713).
- the membrane Conversely, when the air pressure is higher than the pressure of the dielectric fluid circuit (140), the membrane swells and drives the fluid (140) out of the vessel (713).
- a vacuum pump (715) is connected to one of the 2 valve inputs (714).
- the valve (714) therefore makes it possible to regulate a pressure between 0 bar absolute and atmospheric pressure. So to avoid vacuum when stopped, the valve sends an air pressure equal to atmospheric pressure, which allows filling the liquid fluid circuit and keep it in liquid sub-cooled substantially to atmospheric pressure.
- the dielectric fluid (140) is re-aspirated into the vessel (713) by reducing the control pressure of the vessel (713) to a pressure close to the saturation pressure of the dielectric fluid at its measured temperature (T), which allows room for a vapor phase.
- T measured temperature
- the system is dimensioned to have a vapor phase of reduced volume, for example a third of the volume of the pipeline between the module (1) and the radiator (702), which makes it possible to have a relatively small vessel (713).
- the valve (714) and the vacuum pump (715) could be omitted.
- the vase (713) is then simply put at atmospheric pressure. It is even possible to do without a membrane in the case where the dielectric fluid (140) is not sensitive to oxidation or to hydrolysis by oxygen and ambient humidity.
- the removal of the pressure control upstream of the circulation pump (704) simplifies the system but induces an uncontrolled and very high subcooling which harms evaporation on the cells. As a result, the exchange coefficients on contact with the cells are lower and the temperature differences between cells are higher. The use of such a fluid then loses its interest.
- the module is shown with cylindrical cells (414) with a diameter of 66mm and a length of 160mm, with an electrochemistry of the lithium titanate type (LTO), similar to the 40Ah LTO cells of the Yinlong brand.
- LTO lithium titanate type
- the same type of fluid cooling dielectric (140) is not limited to these cells (414) and can be produced for other types of cells, such as for example 18650 format cells for example in LG brand HG2 electrochemistry, or cells in “pocket” format rectangular of low thickness "for example from Xalt or Kokam brand, or prismatic cells for example of dimensions 139x22x56mm from Toshiba.
- the intermediate plates (601) between the cells have a specific design for the evaporative cooling system.
- said plates have substantially vertical passages (602) intended to allow the flow of evaporated fluid to rise towards the exchanger (237).
- the dielectric fluid (140) used has a Tsat (Patm) outside of the operating range, for example the Novec 7100 from the company 3M (trade names) which boils at 61 ° C. at lbarA
- Tsat Peak
- the use of a balloon (160) is not required.
- the box can consist of a flexible envelope (502), as shown in FIGS. 8 and 9.
- a joint (503) which can be a weld between the two parts of the envelope (502).
- the internal pressure lower than the external pressure combined with the flexibility of the envelope (502) implies that said envelope will stick as close to the cells (414), thereby reducing the volume of dielectric fluid (140 ) present in module (1).
- This type of flexible jacket module has an operation similar to that described for a rigid case; as shown in FIG. 6, it also has insulating filling blocks (250), a volume of dielectric fluid (140) in liquid and gas phase (150), an exchanger (237) having inlet and outlet ports. hydraulics (210 and 220).
- the hydraulic outlets (210 and 220) are hermetically linked to the casing (502) by means of welded joints (604) in order to guarantee the hermeticity of the module (1).
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1857915A FR3085545A1 (en) | 2018-09-04 | 2018-09-04 | ELECTRIC MODULE COMPRISING A PLURALITY OF BATTERY CELLS UNDERWATER IN A DIELECTRIC FLUID |
PCT/FR2019/052019 WO2020049248A1 (en) | 2018-09-04 | 2019-09-02 | Electric module comprising a plurality of battery cells submerged in a dielectric fluid |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3847714A1 true EP3847714A1 (en) | 2021-07-14 |
Family
ID=65201259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19774165.5A Pending EP3847714A1 (en) | 2018-09-04 | 2019-09-02 | Electric module comprising a plurality of battery cells submerged in a dielectric fluid |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3847714A1 (en) |
FR (1) | FR3085545A1 (en) |
WO (1) | WO2020049248A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3112245A1 (en) * | 2020-07-03 | 2022-01-07 | Renault S.A.S. | Electrical module for forming an electrical interface of an energy storage system of a motor vehicle |
FR3114445B1 (en) * | 2020-09-22 | 2022-08-12 | Faurecia Systemes Dechappement | Electricity storage battery structure, battery and method for filling the thermal conditioning circuit of such a battery |
FR3115287B1 (en) | 2020-10-19 | 2023-11-24 | Arkema France | Cooling of a battery by immersion in a composition with change of state |
FR3115290B1 (en) | 2020-10-19 | 2023-11-17 | Arkema France | Thermal regulation of a battery by immersion in a liquid composition |
FR3118309B1 (en) * | 2020-12-18 | 2023-09-22 | Wattalps | Waterproof electrical connection device |
CN116615836A (en) * | 2020-12-28 | 2023-08-18 | 3M创新有限公司 | Battery assembly and method |
CN113611936B (en) * | 2021-07-09 | 2023-07-28 | 苏州热工研究院有限公司 | Thermal runaway management device for energy storage lithium battery and installation control method thereof |
CN113839122B (en) * | 2021-09-24 | 2022-07-19 | 傲普(上海)新能源有限公司 | Method for increasing phase change heat dissipation and battery pack structure |
FR3131806B1 (en) * | 2022-01-11 | 2023-11-24 | Valeo Systemes Thermiques | Thermal regulation device for an electrical or electronic component |
FR3134657B1 (en) * | 2022-04-15 | 2024-04-19 | Renault Sas | Device for cooling an electric battery pack |
FR3140088A1 (en) | 2023-09-28 | 2024-03-29 | Arkema France | Cooling of a battery by immersion in a composition with change of state |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070259258A1 (en) * | 2006-05-04 | 2007-11-08 | Derrick Scott Buck | Battery assembly with temperature control device |
US9196930B2 (en) * | 2011-03-24 | 2015-11-24 | Ford Global Technologies, Llc | Vehicle battery cell with integral control circuit |
US9865907B2 (en) | 2013-04-23 | 2018-01-09 | Xiaodong Xiang | Cooling mechanism for batteries using L-V phase change materials |
TWM472953U (en) * | 2013-05-22 | 2014-02-21 | Csb Battery Co Ltd | Wet battery pack |
US11482744B2 (en) * | 2014-03-25 | 2022-10-25 | Teledyne Scientific & Imaging, Llc | Multi-functional structure for thermal management and prevention of failure propagation |
DE102015200700A1 (en) * | 2015-01-19 | 2016-07-21 | Siemens Aktiengesellschaft | High-temperature battery |
FR3037727A3 (en) * | 2015-06-17 | 2016-12-23 | Renault Sa | BATTERY PACK COOLED BY CONSTANT PRESSURE PHASE CHANGE MATERIAL |
EP3166175B1 (en) * | 2015-11-04 | 2018-04-18 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Electric battery having a system for the homogenisation of the internal temperature |
CH712780B1 (en) * | 2016-07-20 | 2020-03-13 | Brugg Rohr Ag Holding | Thermally insulated medium pipes with cell gas containing HFO. |
JP2019196842A (en) * | 2016-09-09 | 2019-11-14 | 株式会社デンソー | Device temperature regulator |
-
2018
- 2018-09-04 FR FR1857915A patent/FR3085545A1/en active Pending
-
2019
- 2019-09-02 EP EP19774165.5A patent/EP3847714A1/en active Pending
- 2019-09-02 WO PCT/FR2019/052019 patent/WO2020049248A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR3085545A1 (en) | 2020-03-06 |
WO2020049248A1 (en) | 2020-03-12 |
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