WO2020100152A1 - Single-phase immersion cooling system in advanced lithium metal oxide battery pack &electronic components on electric vehicles - Google Patents

Single-phase immersion cooling system in advanced lithium metal oxide battery pack &electronic components on electric vehicles Download PDF

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Publication number
WO2020100152A1
WO2020100152A1 PCT/IN2018/050896 IN2018050896W WO2020100152A1 WO 2020100152 A1 WO2020100152 A1 WO 2020100152A1 IN 2018050896 W IN2018050896 W IN 2018050896W WO 2020100152 A1 WO2020100152 A1 WO 2020100152A1
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Prior art keywords
battery
battery pack
cells
modules
dielectric
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Application number
PCT/IN2018/050896
Other languages
French (fr)
Inventor
Guhan PALANISWAMY
Original Assignee
Palaniswamy Guhan
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Publication of WO2020100152A1 publication Critical patent/WO2020100152A1/en

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • 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
    • 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 & disclosure relates to a single-phase liquid immersion cooling system for Lithium Metal oxide Battery packs & electronic components used in Electric vehicles and more particularly to heat removal from electronic devices using single-phase immersion cooling technique & methodology.
  • the present invention relates to the Single-phase liquid immersion cooling system which is a non-conductive fluid equipped & submerged within a lithium metal oxide Battery pack on a Electric vehicle for heat transfer application by allowing the heat transfer to happen directly in-contact with the batteries and other electronic components on the Electric vehicles such as charger’s, Battery Management system & motor & Motor-controller, for example, in Electric vehicle battery systems, which is configured to generate high heating value, and is required to exhibit super-high performance and stable operation under constant temperature.
  • the dielectric non-conductive liquid-cooling type is generally recognized to be high in cooling efficiency because of using a dielectric coolant that is remarkably superior to air in heat transfer performance and transfer heat by directly contacting the heat source which is not possible in conventional liquid
  • immersion dielectric coolant system that uses not the synthetic oil causing the corrosive sulfur & copper salt accumulation& aforementioned problems but a cooling liquid of Dielectric Coolants that are manufactured in a proprietary process from highly processed synthetic chemicals, not petroleum oils.
  • these non-conductive fluids is manufactured through a controlled process of chemical reactions in precision equipment.
  • these Dielectric Coolants contain very few impurities, when compared with white and petroleum oils which are derived from the petroleum distillation process. This purity is a key attribute of these coolants in
  • dielectric breakdown strength is above 60 kV (ASTM D1816).
  • they are filtered at the sub-micron level to remove any particulate contaminants. The result is a dielectric coolant specifically made for heat transfer in Lithium Metal oxide batteries& electronic components on electric vehicles and electrical equipment’s.
  • the housing of the Lithium Metal oxide battery pack is a Fully- sealed housing.
  • the Lithium Metal oxide battery pack& Packs wiring harness and various electronic components can be submerged/immersed within the specifically designed Di-electric coolant that has it’s base from highly processed synthetic chemicals, not petroleum oils.
  • the Battery pack with batteries & electronic components can be disposed within the sealed housing in an immersion cooling arrangement.
  • a pump can be in fluid communication with the passageway of the battery pack through the inlet or the outlet of the sealed housing. Even in some cases, the pump can be submerged within the coolant for operation of fluid flow of the battery pack. The pump can be configured to force the coolant through the passageway while operation of the battery packs.
  • a control module can be operatively connected to the pump that can be used to circulate the fluids from one module to other module to‘n’ number of series of modules on the electric vehicle where heat generated from the batteries& electronic components are circulated through the pump to a radiator/aluminium heat sinks/chiller plate in the electric vehicle which is used to cool the fluids at operation by forced/natural air cooling method.
  • the Lithium Metal oxide battery pack powered by single-phase liquid immersion cooling systems is arranged & packaged densely so as to further reduce the area, size & weight ratio of the battery pack required for constructing the large-scaled battery pack modules to power various devices from Commercial energy storage system to grid system & Electric vehicle application for the space saving purpose which is not possible in an conventional air/liquid cooled design of battery packs.
  • a controller & pump and inlet, oulet connected via passageway/hose to communicate/flow the fluids which is configured to prevent interference between the operating ranges of the adjacent battery pack system which is submerged inside the coolant.
  • the Advanced lithium metal oxide Battery pack consist on‘n’ number of modules to form a battery pack to power an electric vehicle.
  • a single module consist of a 20
  • the liquid immersion cooling system according to the present invention employs Di electric coolant of highly processed synthetic oils for effective heat transfer performance than the conventional Natural/Forced air cooling or liquid cooling used in battery pack nowadays on electric vehicle’s.
  • One of the major advantage of the present invention is that the specially manufactured Dielectric ,Non-conductive coolant are highly resistant to oxidation and
  • the liquid immersion cooling system employs the dielectric coolant to be immersed within various electronic components in a single compact module where these tiny modules when connected to each other forms a Lithium battery pack while operation by maximizing the use of unnecessary space that is used in conventional air/liquid cooling of batteries on electric vehicle’s.
  • the liquid immersion cooling system according to the present invention employs Dielectric coolant of highly processed synthetic oils inside the Advanced Lithium metal oxide battery pack which is fully enclosed sealed system while operation.
  • This Dieelctric coolant that is in direct contact with the batteries & electronic components of the lithium battery pack while operating for heat transfer removal has Flash point of 180° C & dielectric constant of 2.3 which gives the Lithium battery pack an advantage of not boiling over 60° C and evaporating as other dielectric coolant of these kinds that boils under very low temperatures which is not suitable for sealed enclosure battery system.
  • the liquid immersion cooling system according to the present invention has an edge over other conventional air/liquid cooling in terms of safety and high discharge performance characteristic.
  • the module of the battery pack is constructed in a very efficient manufacturing method.
  • These battery pack modules that consists of 20 small cylindrical cells which has a power output of 3.7v & 5 Ah individually and these cells are highly scalable and to manufacture battery modules at large scale, this can be regarded as the highly sealed& scalable Battery pack Architecture for various applications which uses less components for cooling with the use of dielectric coolants than conventional ways of cooling.
  • the Advanced Lithium metal oxide battery pack powered by single-phase liquid immersion cooling system uses a special type of bonding methodology to connect the cylindrical cells in a module to power a electric vehicle by Wire bonding technology which is highly used in semi-conductor industry for very long period of time to wire bond circuit boards. These connected bonds across the cells works very well in charge and discharge of the batteries since the nature of the coolant is non-conductive in nature there will be no problem immersion these wire bonded batteries inside the coolant.
  • This type of bonding allows batteries to passively balance the voltage and amps across the without the need of Battery management system for individual cells since everything in the module that compromises of 20 cylindrical cells are connected in parallel with one another.
  • FIG. 1 is a perspective view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG. 2 is a Isometric view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • F IG. 3 is a top view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG. 4 is a Lateral Sectional view of the Lithium Metal oxide battery pack used in an electric vehicle powered single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a inner core structure of lithium metal oxide battery pack & core Component’s view of an essential part of single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG. 6 is a side view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present
  • FIG.7 is a Rear view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG.8 is an in-depth Isometric Exploded view of the entire Lithium metal oxide battery pack & it’s various component’s used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG.9 is an collective in-depthExploded view of every components used in theLithium metal oxide battery packused in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG. 10 is an isometric sectional view of the first module which consists of 20 cylindrical shaped cells of the Advanced Lithium metal oxide battery pack powered by Dielectric coolant flowing inside the pack where the cells are fully immersed in the fluids.
  • FIG. 11 is a side view of an overall design of an electric motorcycle that is powered by Advanced Lithium metal oxide battery pack with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
  • FIG. 12 is a Perspective view of an overall design of an electric motorcycle where the internal diagram of the battery modules shown in Fig. 9, that is powered by Advanced Lithium metal oxide battery pack with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.

Abstract

Lithium metal oxide Battery pack has plurality of modules forming a battery pack to power electric vehicle. A module consists of 20 Individual cylindrical cells Fully-sealed on housing submerged/Immersed into Specially processed di-electric coolant from synthetic oils for heat removal in batteries. The liquid immersion cooling system employs Di-electric coolant of highly processed synthetic oils for heat transfer performance than conventional Natural/Forced air cooling or liquid cooling used in battery packs. The di-electric coolant used for heat transfer of batteries while operation on electric vehicle's to reduce overall power to weight ratio and complexity of whole battery pack. The Dielectric,Non-conductive coolants are highly resistant to oxidation and ageing. The liquid immersion cooling system employs dielectric coolant immersed within electronic components in single compact module where modules connected to each other forming Lithium battery pack while optimizing use of space used in conventional air/liquid cooling of batteries on electric vehicles.

Description

WO 2020/100152ASE IMMERSION COOLING SYSTEM IN ADV CT/IN2o18/o50896M METAL OXIDE BATTERY PACK &ELECTRONIC COMPONENTS ON
ELECTRIC VEHICLES
INTRODUCTION
Figure imgf000003_0001
The present invention & disclosure relates to a single-phase liquid immersion cooling system for Lithium Metal oxide Battery packs & electronic components used in Electric vehicles and more particularly to heat removal from electronic devices using single-phase immersion cooling technique & methodology.
More specifically, the present invention relates to the Single-phase liquid immersion cooling system which is a non-conductive fluid equipped & submerged within a lithium metal oxide Battery pack on a Electric vehicle for heat transfer application by allowing the heat transfer to happen directly in-contact with the batteries and other electronic components on the Electric vehicles such as charger’s, Battery Management system & motor & Motor-controller, for example, in Electric vehicle battery systems, which is configured to generate high heating value, and is required to exhibit super-high performance and stable operation under constant temperature.
BACKGROUND OF INVENTION
Conventionally, an air-cooling type and a liquid-cooling methods have been in use for cooling Lithium Metal oxide Batteries& various Electronic components in electric vehicles, supercomputers and data centres. The dielectric non-conductive liquid-cooling type is generally recognized to be high in cooling efficiency because of using a dielectric coolant that is remarkably superior to air in heat transfer performance and transfer heat by directly contacting the heat source which is not possible in conventional liquid
cooling. However, because the mineral oil being high in viscosity is used as the cooling liquid, Corrosive sulphur, as its name implies, directly attacks the copper and zinc materials in electronics & electrical components. The corrosive sulfur erodes these metals from circuit boards and electronic components typically attacking areas where current is flowing, and the charged sulphur particles are attracted.it is difficult to
completely remove them from electronic devices taken out from oil-immersed racks, the oil adhered electronic components, and maintenance of the electronic devices is
extremely difficult. Furthermore, the occurrence of a problem has also been reported that causes a difficulty to arise in practical use because the mineral oil give rise to copper salt accumulation’s on electronic devices and fails in a short period of time.
On the other hand, there has been proposed a Non-conductive single phase liquid
immersion dielectric coolant system that uses not the synthetic oil causing the corrosive sulfur & copper salt accumulation& aforementioned problems but a cooling liquid of Dielectric Coolants that are manufactured in a proprietary process from highly processed synthetic chemicals, not petroleum oils.
These non-conductive fluids is manufactured through a controlled process of chemical reactions in precision equipment. As a result, these Dielectric Coolants contain very few impurities, when compared with white and petroleum oils which are derived from the petroleum distillation process. This purity is a key attribute of these coolants in
comparison with white oils as it eliminates issues such as oxidation resistance and material compatibility. The manufacturing of these special type Dielectric Coolants occurs at high temperatures and under high vacuum, such that upon packaging, the average moisture content of these Dielectric Coolants is less than 10 ppm and the
dielectric breakdown strength is above 60 kV (ASTM D1816). In addition, they are filtered at the sub-micron level to remove any particulate contaminants. The result is a dielectric coolant specifically made for heat transfer in Lithium Metal oxide batteries& electronic components on electric vehicles and electrical equipment’s.
Hence the need arises for development of the compact single-phase liquid immersion cooling system for lithium metal oxide battery packs used in various electric vehicle applications with excellent cooling efficiency that is suitable for High charge & Discharge applications on battery packs in electric vehicles. Such methodology has been applied & tested to the electric vehicles.
OBJECT OF THE INVENTION In every embodiements,the housing of the Lithium Metal oxide battery pack is a Fully- sealed housing. The Lithium Metal oxide battery pack& Packs wiring harness and various electronic components can be submerged/immersed within the specifically designed Di-electric coolant that has it’s base from highly processed synthetic chemicals, not petroleum oils. The Battery pack with batteries & electronic components can be disposed within the sealed housing in an immersion cooling arrangement.
A pump can be in fluid communication with the passageway of the battery pack through the inlet or the outlet of the sealed housing. Even in some cases, the pump can be submerged within the coolant for operation of fluid flow of the battery pack.The pump can be configured to force the coolant through the passageway while operation of the battery packs.
A control module can be operatively connected to the pump that can be used to circulate the fluids from one module to other module to‘n’ number of series of modules on the electric vehicle where heat generated from the batteries& electronic components are circulated through the pump to a radiator/aluminium heat sinks/chiller plate in the electric vehicle which is used to cool the fluids at operation by forced/natural air cooling method.
The Lithium Metal oxide battery pack powered by single-phase liquid immersion cooling systems is arranged & packaged densely so as to further reduce the area, size & weight ratio of the battery pack required for constructing the large-scaled battery pack modules to power various devices from Commercial energy storage system to grid system & Electric vehicle application for the space saving purpose which is not possible in an conventional air/liquid cooled design of battery packs. In order to realize the dense arrangement of the liquid immersion cooling battery pack systems, it is necessary to develop a controller & pump and inlet, oulet connected via passageway/hose to communicate/flow the fluids which is configured to prevent interference between the operating ranges of the adjacent battery pack system which is submerged inside the coolant..
The above mentioned cooling systemrelates to the present invention and other features of the systems and methods of the subject disclosure will become more readily apparent to those skilled in the art from the following detailed description of the preferred embodiments taken in conjunction with the drawings.
The Advanced lithium metal oxide Battery pack consist on‘n’ number of modules to form a battery pack to power an electric vehicle. A single module consist of a 20
Individual cylindrical cells that are Fully-sealed on the housing & is
submerged/immersed into a Specially processed di-electric coolant from highly
processed synthetic oils for effective heat removal that is generated by batteries while operation.
The liquid immersion cooling system according to the present invention employs Di electric coolant of highly processed synthetic oils for effective heat transfer performance than the conventional Natural/Forced air cooling or liquid cooling used in battery pack nowadays on electric vehicle’s.
Thus, these advantages has made the di-electric coolant that is used for efficient heat transfer of batteries while operation on electric vehicle’s to reduce the overall power to weight ratio and complexity of the whole battery pack.
One of the major advantage of the present invention is that the specially manufactured Dielectric ,Non-conductive coolant are highly resistant to oxidation and
ageing. These coolants when operated under Fully sealed system have a service life exceeding 20 years, many times more than that of raw white mineral oils.
The liquid immersion cooling system according to the present invention employs the dielectric coolant to be immersed within various electronic components in a single compact module where these tiny modules when connected to each other forms a Lithium battery pack while operation by maximizing the use of unnecessary space that is used in conventional air/liquid cooling of batteries on electric vehicle’s.
The liquid immersion cooling system according to the present invention employs Dielectric coolant of highly processed synthetic oils inside the Advanced Lithium metal oxide battery pack which is fully enclosed sealed system while operation. This Dieelctric coolant that is in direct contact with the batteries & electronic components of the lithium battery pack while operating for heat transfer removal has Flash point of 180° C & dielectric constant of 2.3 which gives the Lithium battery pack an advantage of not boiling over 60° C and evaporating as other dielectric coolant of these kinds that boils under very low temperatures which is not suitable for sealed enclosure battery system.
The liquid immersion cooling system according to the present invention has an edge over other conventional air/liquid cooling in terms of safety and high discharge performance characteristic.
Since these coolants Extinguishes a fire in seconds, before it even starts and long before water-based systems discharge. Helps protect irreplaceable electronics. Because these dielectric non conductive fluid is a waterless fire suppression solution, it leaves no residue and is electrically non-conductive.so this has a very great advantage which could overcome the existing problem of fire explosions on a battery pack by a factor of safety that is higher than the conventionally manufactured Lithium battery packs.
For example, the module of the battery pack is constructed in a very efficient manufacturing method. These battery pack modules that consists of 20 small cylindrical cells which has a power output of 3.7v & 5 Ah individually and these cells are highly scalable and to manufacture battery modules at large scale, this can be regarded as the highly sealed& scalable Battery pack Architecture for various applications which uses less components for cooling with the use of dielectric coolants than conventional ways of cooling.
The Advanced Lithium metal oxide battery pack powered by single-phase liquid immersion cooling system according to the present invention uses a special type of bonding methodology to connect the cylindrical cells in a module to power a electric vehicle by Wire bonding technology which is highly used in semi-conductor industry for very long period of time to wire bond circuit boards. These connected bonds across the cells works very well in charge and discharge of the batteries since the nature of the coolant is non-conductive in nature there will be no problem immersion these wire bonded batteries inside the coolant. This type of bonding allows batteries to passively balance the voltage and amps across the without the need of Battery management system for individual cells since everything in the module that compromises of 20 cylindrical cells are connected in parallel with one another.
The foregoing object and advantages of the present invention will be further clarified by the description of the following embodiments. However, the embodiments described hereafter are for exemplification purpose and do not intend to limit the present invention to the embodiments.
DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE INVENTION WITH RESPECT TO THE DRAWINGS / BLOCK DIAGRAMS
The accompanying figures, in which like reference numerals refer to identical or functionally- similar elements throughout the separate views and which are incorporated in and form a part of the specification, further illustrate the present invention and, together with the detailed description of the invention, serve to explain the principles of the present invention. FIG. 1 is a perspective view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG. 2 is a Isometric view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
F IG. 3 is a top view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG. 4 is a Lateral Sectional view of the Lithium Metal oxide battery pack used in an electric vehicle powered single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG. 5 is a perspective view of a inner core structure of lithium metal oxide battery pack & core Component’s view of an essential part of single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG. 6 is a side view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present
invention.
FIG.7 is a Rear view of an overall structure of a Advanced Lithium metal oxide battery pack used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG.8 is an in-depth Isometric Exploded view of the entire Lithium metal oxide battery pack & it’s various component’s used in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG.9 is an collective in-depthExploded view of every components used in theLithium metal oxide battery packused in an electric vehicle powered with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG. 10 is an isometric sectional view of the first module which consists of 20 cylindrical shaped cells of the Advanced Lithium metal oxide battery pack powered by Dielectric coolant flowing inside the pack where the cells are fully immersed in the fluids.
FIG. 11 is a side view of an overall design of an electric motorcycle that is powered by Advanced Lithium metal oxide battery pack with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.
FIG. 12 is a Perspective view of an overall design of an electric motorcycle where the internal diagram of the battery modules shown in Fig. 9, that is powered by Advanced Lithium metal oxide battery pack with single-phase liquid(Dielectric Coolant) immersion cooling methodology according to an embodiment of the present invention.

Claims

What is claimed is
1) A Single-Phase immersion cooling system powered by Dielectric non-conductive fluids is configured to immerse Advanced Lithium metal oxide battery pack & associated electronic components in the dielectric coolant for direct cooling to aid the heat transfer of battery pack during operation, this single-phase immersion cooled battery system comprising :
A Series of battery modules having a fully sealed system defined by six sided wit/i aluminium/plastic enclosed casing.
The battery modules having configured, arranged housing parts to accommodate cylindrical based battery cells
And a stamped aluminium/nickel based bus bars has been placed in the centre part on the housing in the battery modules , wherein:
A passageway/tubing & hose is provided to aid the flow of the dielectric coolant from one fluid stream battery modules to the connected series of fluid stream battery modules connected via passageway in the battery pack of the electric vehicle.
Aninlet and outlet valve is placed to ensure smooth transition of dielectric fluid stream one battery module to another battery module to dissipate heat removal throughout the entire battery pack while operation and rubber sealants are placed in its way to keep the dielectric coolant to flow to required fluid stream without spilling/moving away from the destined flow path.
Each battery modules are connected with external positive & negative terminals with the adjacent battery modules to form a battery pack for a useful application.wherein;
A pump unit and motor controller system to ensure smooth flow of the dielectric coolant through the destined passageway and pump unit is placed outside the battery modules to circulate fluids from one fluid stream to another fluid stream. A radiator / aluminium heat sink is provided via the passageway/hose for the fluid to cool down the dielectric coolant which absorbs heat from batteries during operation and, the pump unit circulates the heated fluids to radiator to cool the fluids and these cooled fluids pass to the desired channel path to achieve cooling efficiency in the battery packs while operation forming a closed loop system.
2) The Single-Phase immersion cooling system powered by Dielectric non-conductive fluids in Advanced lithium metal oxide battery packs according to claim 1, wherein: the individual battery modules are fully immersed in a non-conductive , dielectric coolant having its chemical basis from highly processed synthetic oils and not petroleum oils and are in direct contact with the individual 26650 designated cell architecture inside the battery modules for efficient heat transfer removal of batteries during operation than conventional ways of air/liquid cooled battery packs.
3) The Single-Phase immersion cooling system powered by Dielectric non-conductive fluids in battery packs according to claim 2, wherein the cell housing of the battery modules acts as rigid structure to hold the individual cylindrical cells in 3 layer organized format and also acting as a doorway for connecting adjacent cell through aluminium/nickel based alloy bus bars having the busbar tabs at the centre of housing and the outer casing and bus bars connect with screws upon them by which the battery housing aids as a single layer structure to connect every internal battery module components.
4) The dielectric coolant powered battery pack cooling system according to claim
2, wherein the battery housing of the battery pack architecture consist of 20 cylindrical cells in a 3 layer 7:6:7 cell organized format. whereas depending upon the application and the environment of use to increase the individual battery module capacity you can upgrade the 3 layer cell format by increasing the cells layer format of 7:6:7 cells to 10:9: 10 or‘n:n:n’ series of cells format into vertical column wise order by using the previous battery pack architecture as its base design to expand cells in a module. 5) The dielectric coolant powered battery pack cooling system according to claim 3, wherein the 26650 cylindrical cell designation is used for the electric
motorcycle, wheras 18650 cylindrical cell designation can also be used and various individual cylindrical cell architecture designation can be used with the battery module design by slightly changing the battery housing& outer casing dimensions according to the individual cell designation.
6) The dielectric coolant powered battery pack cooling system according to claim
1, wherein the battery modules has an inlet and outlet valve for flow of the dielectric, non-conductive fluids into the desired path with the help of a pump unit outside the battery module and maintaining the flow rate of the fluid stream from one module to other modules of the battery pack via pump unit & motor controller.
7) The dielectric coolant powered battery pack cooling system according to claim
5, wherein the battery module system comprises of 20 individual cylindrical cells of 26650 designation are connected by a conductive strip that can be screwed with the battery housing layer. The individual cells are connected to the conductive strip that is made of aluminium/nickel based alloy through the wire bonding methodology by connecting adjacent cells to the conductive strip by cold diffusion process of aluminium filament to bond adjacent cells in the battery module for long battery life extension of cells by eliminating hot diffusion process where cells tend to degrade and lose internal resistance while connection and also protection of cells from voltage variations.
8) The dielectric coolant powered battery pack cooling system according to claim
6, wherein each battery modules contains about 20 cylindrical cells in 3 layer organized format by connecting every single cell in parallel connection and arranging the entire battery pack with positive terminal of the cells in the top surface portion and negative terminals of the every cells in the bottom surface portion so that parallel connection with the adjacent cells can be made by connecting cells from positive to positive and negative to negative terminals using wire bonding methodology.
9) The dielectric coolant powered battery pack cooling system according to claim 9, the battery modules of the battery pack can be configured in horizontal row wise order and vertical column wise order, whereas the battery modules after the outer casing is fitted to each housing.these modules can connected with be with one another via the passageway/hose of the first module to the second module to share the flow of fluids and also can connect the terminals of the battery modules to make a battery system.
10) The dielectric coolant powered battery pack cooling system wherein 16 of these battery modules are placed in the electric motorcycle shown in Fig.12, where 8 of these modules are placed in the chassis floor and the rest 8 is followed by stacking them vertically upon the previous modules to complete a battery system which can used to power a electric motorcycle.
11) The dielectric coolant powered battery pack cooling system according to claim
10, wherein said Dielectric coolant flows in said first channel/passageway path from said first fluid stream to said second fluid stream of the battery modules and accordingly flows through the battery system to complete a closed loop fluid system.
PCT/IN2018/050896 2018-11-15 2018-12-31 Single-phase immersion cooling system in advanced lithium metal oxide battery pack &electronic components on electric vehicles WO2020100152A1 (en)

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Cited By (9)

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FR3115287A1 (en) 2020-10-19 2022-04-22 Arkema France Cooling of a battery by immersion in a composition with change of state
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Publication number Priority date Publication date Assignee Title
US11929474B2 (en) 2020-06-17 2024-03-12 Technologies Ve Inc. Battery module and battery pack thermal control system
WO2022084599A1 (en) 2020-10-19 2022-04-28 Arkema France Cooling a battery by immersion in a composition with a change in state
FR3115287A1 (en) 2020-10-19 2022-04-22 Arkema France Cooling of a battery by immersion in a composition with change of state
FR3115288A1 (en) 2020-10-19 2022-04-22 Arkema France Cooling of a battery by immersion in a composition with change of state
FR3115289A1 (en) 2020-10-19 2022-04-22 Arkema France Thermal regulation of a battery by immersion in a liquid composition
WO2022084600A1 (en) 2020-10-19 2022-04-28 Arkema France Thermal regulation of a battery by immersion in a liquid composition
FR3115290A1 (en) 2020-10-19 2022-04-22 Arkema France Thermal regulation of a battery by immersion in a liquid composition
WO2023031768A1 (en) * 2021-08-30 2023-03-09 3M Innovative Properties Company Immersion cooling system including hydrolysis-resistant fluoroketone
FR3129530A1 (en) 2021-11-23 2023-05-26 Commissariat A L'energie Atomique Et Aux Energies Alternatives Enclosure for battery module or battery pack, with sealed membrane intended to allow circulation of a heat transfer fluid within it for optimal cooling of the accumulators of the module or pack, leaving the output terminals unobstructed.
EP4199190A2 (en) 2021-11-23 2023-06-21 Commissariat à l'énergie atomique et aux énergies alternatives Enclosure for a battery module or battery pack, with a sealed membrane for allowing a circulation of a heat transfer fluid therein for optimal cooling of the module or pack batteries.
CN114361650A (en) * 2022-01-07 2022-04-15 中山大学 Experimental research system and method for thermal management performance of immersed cooling battery
WO2023233417A1 (en) * 2022-06-01 2023-12-07 Clean Electric Private Limited Submerged liquid-cooled modular battery system
CN115420855A (en) * 2022-08-23 2022-12-02 常州博瑞电力自动化设备有限公司 Method for testing running compatibility of battery cell in fluorinated liquid
CN115420855B (en) * 2022-08-23 2023-07-11 常州博瑞电力自动化设备有限公司 Method for testing running compatibility of battery cells in fluorinated solution
FR3140088A1 (en) 2023-09-28 2024-03-29 Arkema France Cooling of a battery by immersion in a composition with change of state

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