The cooling systems may include cooling plates or fins sandwiched between individual battery cells within the battery pack. The i-CoBat project—a collaboration between M&I Materials, WMG and Ricardo —aims to develop and to demonstrate a new form of EV battery cooling technology based on cell immersion cooling using dielectric fluid.. The coolant 130 provides an external heat exchange with the vehicle, where the vehicle is a hybrid vehicle. A method of cooling a vehicle battery pack comprising the steps of: providing a sealed container having an interior space; providing a battery assembly within the interior space of the container and including a plurality of battery cells having at least one fluid channel formed therebetween; providing a dielectric fluid within the interior space; immersing at least a portion of the battery assembly with the dielectric fluid; causing the dielectric fluid to flow about the plurality of battery cells throughout the interior space of the container; heating the dielectric fluid during start up of the vehicle to heat the plurality of battery cells, wherein a heating element disposed within the interior space of the sealed container is used to cool the dielectric fluid; and, cooling the dielectric fluid during operation of the vehicle to maintain. The method of cooling a vehicle battery pack of, Lithium ion battery cooling system comprising dielectric fluid, Application filed by GM Global Technology Operations LLC, Assigned to GM Global Technology Operations LLC. It promises “improved power output and cell longevity, faster […] 2 illustrates a plurality of self-contained liquid cooling modules 12 connected in series via a conduit 60 and forming a cooling system 100 for use in a hybrid vehicle or BEV. The heated dielectric coolant 28 will rise and flow to the top of the battery cell stack 22 to be cooled by the cooling element 38. Despite their many advantages, Li-ion batteries are e… 16-18. MIVOLT DF is a range of readily biodegradable dielectric fluids for the direct immersion cooling of EV battery systems and charging stations. Disconnect cables from terminals ALWAYS disconnect ground cable first and reconnect last Charge battery. A coolant temperature sensor 46 measures the dielectric coolant 28 temperature at the outlet 44 of the cooling element 38. SECURITY AGREEMENT;ASSIGNOR:GM GLOBAL TECHNOLOGY OPERATIONS LLC;REEL/FRAME:028458/0184, Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:WILMINGTON TRUST COMPANY;REEL/FRAME:034186/0776, Free format text: batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries, 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, TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE, REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION, Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation, CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION, Other road transportation technologies with climate change mitigation effect, Energy storage systems for electromobility, e.g. The container 14 is a closed and sealed container 14 for forming a self-contained liquid cooling system 10. This innovative development strategy enables a battery system to run continuously at higher power and also facilitates quicker charging times. The water within the cooling element 38 is chilled by an existing air conditioning system chiller of the vehicle and circulated from the inlet 42 to the outlet 44 of the cooling element 38. The Lithium Ion battery cooling system of, 13. In a further embodiment, a method of cooling a vehicle battery pack comprises the steps of: providing a sealed container having an interior space; providing a battery assembly within the interior space of the container and including a plurality of battery cells having at least one fluid channel formed therebetween; providing a dielectric fluid within the interior space; immersing at least a portion of the battery assembly with the dielectric fluid; causing the dielectric fluid to flow about the plurality of battery cells throughout the interior space of the container; and cooling the dielectric fluid during operation of the vehicle to maintain a substantially uniform surface temperature over each of the plurality battery cells. The cooling of electronic parts has become a major challenge in recent times due to the advancements in the design of faster and smaller components. During start up of a vehicle, a heating element 34 located along the base area 36 of the container 14 may heat the dielectric fluid 28 to boiling. FIG. That brings us to Tesla’s patent application where it talks about using an engineered dielectric fluid for the cooling fluid. A battery assembly 18 is disposed within the interior space 16 of the container 14. Dielectric Coolants specifically designed for ASIC-base cryptocurrency mining using Single-phase, Liquid Immersion Cooling tanks. The cooling element 38 may be a graphite foil impregnated with an electrically nonconductive polymer. The dielectric coolant 28 is in contact with the battery cells 20 through the fluid channels 26 formed by gaps 24. The method includes the steps of providing a closed and sealed container 14. In turn, the heat generated from each cooling module 12 may be expelled through the outlet 44 to the coolant 130 by a conduit 80. The electrochemical-thermal model of Li-ion pouch cell immersed in flowing dielectric fluid assisted with tab cooling was developed using Multi-Scale Multi-Domain (MSMD) approach with Newman, Tiedemann, Gu, and Kim (NTGK) model. The technology in development is based on cell immersion cooling using dielectric fluid. The unique chemistry of MIVOLT fluids allows them to act as a dielectric coolant, removing heat directly from all areas of … Coolants are used in bot… Retrieved online on Mar. While certain representative embodiments and details have been shown for purposes of illustrating the invention, it will be apparent to those skilled in the art that various changes may be made without departing from the scope of the disclosure, which is further described in the following appended claims. We are the premier manufacturer of SLIC Coolants! In another embodiment, the plurality of battery cells 20 is Li-ion batteries for use in a Battery Electric Vehicle (BEV). The above, as well as other advantages of the present disclosure, will become readily apparent to those skilled in the art from the following detailed description, particularly when considered in the light of the drawings described herein. Similarly, if the general location of the dielectric coolant 28 at the moment of boiling is located within the fluid channels 26 of the battery cells 20 in the center area and toward an opposing side 52 of the battery cell stack 22, the dielectric coolant 28 will tend to follow flow path âBâ. The stakes related to cooling are high, not only to ensure safe and effective operation, but also to avoid damage to equipment. Immersion cooling is an IT cooling practice by which IT components and other electronics, including complete servers, are submerged in a thermally conductive dielectric liquid or coolant. Cooling and Preheating of Batteries in Hybrid Electric Vehicles:, Ahmad Pesaran, The 6th ASME-JSME Thermal Engineering Joint Conference, Mar. 18, 2013 from: http://www.nrel.gov/vehiclesandfuels/energystorage/pdfs/jte-2003-633-sw-ap.pdf. Heat is removed from the system by circulating liquid into direct contact with hot … The battery assembly 18 includes a plurality of battery cells 20 having fluid channels 26 formed between the stacked cells 20. 12/713,729 to Essinger et al. MIVOLT is a new range of biodegradable dielectric fluids developed by M&I Materials to provide immersion cooling for electric vehicle (EV) batteries and charging points. M&I Materials Launches New Range of Dielectric Liquids for Immersion Cooling of EV Batteries and Charging Points. A cooling element is disposed within the interior space and cools the dielectric fluid. In one embodiment, the dielectric coolant 28 may be halogenated. Owner name: The cooled dielectric coolant 28 will return to the base area 36, generally following either coolant paths âAâ or âB.â Where the general location of the dielectric coolant 28 at the moment of boiling is located within the fluid channels 26 of the battery cells 20 in the center area and toward a side 50 of the container 14, the dielectric coolant 28 will tend to follow flow path âAâ. In still another embodiment, the cooling element 38 may be a thin aluminum heat sink having external chilled water travelling through the cooling element 38. Condensation heating ensures efficient and uniform temperature heat transfer without overshoot of the battery cell 20 temperatures. a cooling element disposed within the interior space configured to cool the dielectric fluid. Note also the relatively stable viscosity of the Dielectric fluid as temperatures range from 0 to 100 degrees Celsius. The stakes related to cooling are high, not only to ensure safe and effective operation, but also to … Upon heating of each battery cell 20 by the heating element 34, the dielectric coolant 28 exposed to a front surface area 30 and a rear surface area 32 of the battery cells 20, will boil. Keep fluid level above the plates in each cell, using distilled water. The two biggest challenges for electric cars—battery life and charge times—come down to battery cooling. The use of a liquid coolant has become attractive due to the higher heat transfer coefficient achieved as compared to air-cooling. M&I Materials, WMG and Ricardo announced a joint research project i-CoBat to develop a next generation battery cooling system, which utilizes dielectric fluid. Additional batteries for use with other prime mover vehicles may be provided with the liquid cooling system 10 of the present invention, where each battery cell includes active material for generating power from an electrochemical reaction within the interior space 16 of the container 14. 3M™ Fluorinert™ and Novec™ fluids have both properties; are non flammable and low in toxicity over a range of boiling pints with a dielectric strength of ~40kV. Ricardo joins forces with M&I Materials and WMG with funding through the British government. No. Use leakproof containers when draining fluids. FIG. A Lithium Ion battery cooling system for use in a hybrid vehicle comprising: a plurality of self-contained liquid cooling modules, each of the cooling modules further comprising: a battery assembly disposed within the interior space of the container and including a plurality of battery cells having at least one fluid channel formed therebetween; 11. The other of the plastic coated metal layers is then placed on top of the battery cell components and fused at the periphery to the one of the plastic coated metal layers with the cavity, for example, by heat sealing around the edges. The Lithium Ion battery cooling system of, 12. In the embodiment shown, a gap 24 between each battery cell 20 is between 0.25-0.50 mm, forming a fluid channel 26 between each battery cell 20. The battery cells 20 are preferably stacked to form a battery cell stack 22. This innovation promises improved power output and cell longevity, faster charging rates and lower costs, significantly addressing the key consumer issue of range anxiety. A 2016 comparative study on cooling methods for Li-ion batteries considered four cell-cooling methods — air cooling, direct liquid immersion, indirect liquid cooling, and fin cooling. 3M™ Performance Fluids. 10. It is understood that other gap sizes can be used as desired. In respect of the methods disclosed, the steps presented are exemplary in nature, and thus, the order of the steps is not necessary or critical. lower temperatures. Assignors: GM Global Technology Operations LLC. Posted July 12, 2019 by Ryan Austin & filed under Newswire, The Tech . UK-based M&I Materials has developed a new range of biodegradable dielectric fluids, MIVOLT, to provide immersion cooling for EV batteries and charging points. MIVOLT, the range of dielectric liquids M&I Materials has engineered for the EV market, acts as an immersion coolant for both EV batteries and … Direct contact cooling of live electronic circuits and electrical components requires a fluid with excellent thermal characteristics and dielectric properties. The stacked cells 20 maintain a gap 24 between battery cells 20 of no greater than 0.50 mm and no less than 0.25 mm in one embodiment. The heated vapors rise to the upper area 40 of the container and are cooled by the cooling element 38. WILMINGTON TRUST COMPANY, DELAWARE, Free format text: A good agreement within ± 5% was found between the results of numerical study and experimental data. The present disclosure further includes a method of cooling a vehicle battery pack. Battery cells are dropped directly into dielectric fluids maintaining constant coolant to cell contact. PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551). As a result, different cooling technologies have been developed to efficiently remove the heat from these components [1, 2]. Typical prismatic battery cells have a pair of plastic coated metal layers fused around a periphery of the battery cell in order to seal the battery cell components. The description and the drawing serve to enable one skilled in the art to make and use the invention, and are not intended to limit the scope of the invention in any manner. The heating element 34 is shown as a single element; however, multiple heating elements 34 such as heating plates may be provided. Do not use food or beverage containers that may mislead someone into drinking from them. Synthetic fire-resistant non-corrosive dielectric fluid for bit mining applications, Dielectric Coolants for single-phase, liquid, General cooling of servers, CPU/ASIC/GPU. ElectroSafe encompasses a broad spectrum of highperformance, synthetic coolants that have undergone a … A Lithium Ion battery cooling system for use in a hybrid vehicle comprises a plurality of self-contained liquid cooling modules, each cooling module including a closed and sealed container having an interior space. For guidance in selecting a heat transfer solution and general application advice, contact a 3M expert. Keeps batteries cooler, even in extreme conditions. The Lithium Ion battery cooling system of, 15. A battery cell has been proposed as a clean, efficient and environmentally responsible power source for electric vehicles and various other applications. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY, Heating or cooling; Temperature control specially adapted for specific applications, Means for temperature control structurally associated with the cells, Solid structures for heat exchange or heat conduction, Solid parts with flow channel passages or pipes for heat exchange, Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid, Liquids characterised by flow circuits, e.g. and U.S. patent application Ser. Retrieved online on Mar. A dielectric fluid is disposed within the at least one fluid channel. In concordance with the instant disclosure, a battery cooling system and method of cooling a battery pack is surprisingly discovered. loops, located externally to the cells or cell casings, Accumulators with non-aqueous electrolyte, Rocking-chair batteries, i.e. In a first embodiment, a vehicle battery pack with a self-contained liquid cooling system comprises a sealed container having an interior space; a battery assembly disposed within the interior space of the container, the battery assembly including a plurality of battery cells having at least one fluid channel formed therebetween; a dielectric fluid disposed within the at least one fluid channel in contact with the battery cells of the battery assembly and configured to heat and cool the battery assembly; a heating element disposed within the interior space configured to heat the dielectric fluid; and a cooling element disposed within the interior space configured to cool the dielectric fluid. That’s why they’re increasingly important in electronics applications ranging from portable devices to grid energy storage — and they’re becoming the go-to battery for EVs and hybrid electric vehicles (HEVs) because of their high energy density compared to their weight. In another embodiment, the gap 24 may be less than 0.25 mm. A heating element is disposed within the interior space and heats the dielectric fluid. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). The cooling element 38 may be a chilled water condenser having an inlet 42 and an outlet 44 extending beyond the walls of the sealed container 14 for importing and exporting water for the cooling element 38. 1 is a schematic view of the battery cooling system of the present disclosure; and. Desirably, the battery cooling system and method maintains uniform surface temperatures over the battery cells and efficiently transfers heat away from the cells using open bath cooling in a hybrid vehicle. AmpCool Dielectric Coolants are materially compatible with all materials commonly used in electric motors, hydraulic systems, and with all battery chemistries. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MCDONALD, STEPHEN S.;REEL/FRAME:027542/0445, Owner name: GM GLOBAL TECHNOLOGY OPERATIONS LLC, MICHIGAN, Free format text: Cooling by the circulation of water-based coolant through cooling passages within the battery structure. In another embodiment, a Lithium Ion battery cooling system for use in a hybrid vehicle comprises a plurality of self-contained liquid cooling modules, each of the cooling modules further comprises a sealed container having an interior space; a battery assembly disposed within the interior space of the container and including a plurality of battery cells having at least one fluid channel formed therebetween; a dielectric fluid disposed within the at least one fluid channel in contact with the battery cells of the battery assembly and configured to heat and cool the battery assembly; a heating element disposed within the interior space configured to heat the dielectric fluid; and a cooling element disposed within the interior space configured to cool the dielectric fluid. In one embodiment, the dielectric fluid 28 may be conditioned to have a boiling point at or near the desired operating temperature of the battery cells 20. The Lithium Ion battery cooling system of, 14. Full immersion cooling of battery cells eliminates heavy and complex heat spreaders and water coolant containment housings, while providing increased flexibility in battery cell placement. batteries. Each cooling module includes a battery assembly disposed within the interior space of the container and a plurality of battery cells having at least one fluid channel formed therebetween for receiving a fluid therein. 16-20, 2003, p. 1-7. Dielectric Coolants for high-voltage power, distribution transformers and switching applications. 18, 2013 from: http://www.nrel.gov/vehiclesandfuels/energystorage/pdfs/jteâ2003-633âswâap.pdf. Extreme Automotive KERS systems, hydraulics, powertrain, permanently sealed systems with lubrication. The battery cell for incorporation in a battery pack assembly is thereby provided. The container 14 has an interior space 16. Engineered Fluids is the premier manufacturer of the safest and most effective dielectric heat transfer fluids specifically engineered for use in full immersion cooling. The system 10 is a module 12 formed of a container 14 with an interior space 16 for supporting a battery assembly 18. In another embodiment, the gap 24 may be less than 0.25 mm. There is a continuing need for a battery cooling system and a method for making the battery cooling system that maximizes efficient heating and cooling of the battery cells with minimum delta temperatures. PATENTED CASE, Free format text: When the battery cells 20 are operating, the dielectric coolant 28 boils on the surfaces of the battery cell 20, keeping temperatures of the surfaces uniform and transferring heat efficiently to the cooling element 38. The heated coolant 28 rises, traveling through the fluid channels 26 from the base area 36 of the container 14 to the upper area 40, fully flowing across each battery cell 20 throughout the interior space 16 of the container 14 as illustrated by arrows âAâ and âBâ. 1, a vehicle battery pack with a self-contained liquid cooling system 10 of the present disclosure is there shown. MIVOLT CL200 MIVOLT CL200 MIVOLT FF is a range of readily biodegradable dielectric fluids for the direct immersion cooling of aerospace electronics. The present disclosure relates to a vehicle battery pack with a self-contained liquid cooling system. To implement the required high cooling performance during the rapid charging process, the battery cells are surrounded by dielectric fluid as part of the MAHLE battery housing concept. In one embodiment, the battery assembly 18 includes a plurality of battery cells 20 such as a plurality of Lithium-ion (Li-ion) batteries for use in a hybrid vehicle. With reference to FIG. The cooling element may also be formed from copper. 2 is a plan view of multiple battery cooling systems of the present invention connected in series. The Lithium Ion battery cooling system of, 16. Similarly, if the general location of the dielectric coolant 28 at the moment of boiling is located within the fluid channels 26 of the battery cells 20 in the center area and toward an opposing side 52 of the container 14, the dielectric coolant 28 will tend to follow flow path âBâ. The fiber-reinforced plastic design is not only lightweight, but also extremely robust. Cooling by flooding the battery with a dielectric oil which is then pumped out to a heat exchanger system. A coolant level sensor 48 measures the level of the dielectric coolant 28 within the container 14. A vehicle battery pack with a self-contained liquid cooling system comprising: a sealed container having an interior space; a battery assembly disposed within the interior space of the container, the battery assembly including a plurality of battery cells having at least one fluid channel formed therebetween; a dielectric fluid disposed within the at least one fluid channel in contact with the battery cells of the battery assembly and configured to heat and cool the battery assembly; a heating element disposed within the interior space configured to heat the dielectric fluid; and. Do not pour waste onto the ground, down a drain, or into any water source. The battery cell components are disposed inside the cavity of the plastic coated metal layer. Air conditioning refrigerants escaping into the air can damage the Earth's atmosphere. When overheated or otherwise exposed to high-temperature environments, undesirable effects can impact the operation of lithium-ion batteries. 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