OFF-SEASON BATTERY STORAGE: Identify each cable so cables can be reconnected to correct terminals. Multiple battery cells 20 form multiple modules 12. The i-CoBat project aims to develop and demonstrate novel battery cooling technology for power packs used in electric vehicles. The Lithium Ion battery cooling system of, 12. a substantially uniform surface temperature over each of the plurality battery cells, wherein a cooling element disposed within the interior space of the sealed container is used to cool the dielectric fluid. loops, located externally to the cells or cell casings, Accumulators with non-aqueous electrolyte, Rocking-chair batteries, i.e. 18, 2013 from: http://www.nrel.gov/vehiclesandfuels/energystorage/pdfs/jte-2003-633-sw-ap.pdf. 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. 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. By filling the gap 24 with the dielectric coolant 28, both heating and cooling can be accomplished. 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. 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. Each gap 24 forms the fluid channel 26 between adjacent battery cells 20. When your Toyota is in need of service fluid replacement, visit us here at Quality Toyota. resistances so battery cell and pack cooling is paramount. ElectroSafe encompasses a broad spectrum of highperformance, synthetic coolants that have undergone a … Direct-to-chip cooling can be implemented using single-phase and … There are 3 common battery thermal management methods used today: Convection to air either passively or forced. Do not use food or beverage containers that may mislead someone into drinking from them. 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 battery cell stack 22, the dielectric coolant 28 will tend to follow flow path âAâ. MIVOLT DF is a range of readily biodegradable dielectric fluids for the direct immersion cooling of EV battery systems and charging stations. Do not pour waste onto the ground, down a drain, or into any water source. Use leakproof containers when draining fluids. While non-dielectric fluids (e.g., water glycol) are often used in direct-to-chip cooling, dielectric fluids can be used in direct-to-chip applications to mitigate risks associated with leaks, increasing hardware/IT equipment reliability. Nonlimiting examples of known cooling systems for battery cells are described in Assignee's co-pending U.S. patent application Ser. Air conditioning refrigerants escaping into the air can damage the Earth's atmosphere. The Lithium Ion battery cooling system of, 13. 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. A battery assembly 18 is disposed within the interior space 16 of the container 14. 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. Conventional cooling systems have included air to air cooling, cooling plates or fins sandwiched between individual battery cells within the battery pack along with heat sinks in the same location. GM GLOBAL TECHNOLOGY OPERATIONS LLC, MICHIGAN, Free format text: In another embodiment, the gap 24 may be less than 0.25 mm. A coolant level sensor 48 is also provided and is located near the upper area 40 of the container 14 to measure the fluid level of the dielectric coolant 28 within the container 14, ensuring complete immersion of the battery assembly 18 within the dielectric coolant 28. 18, 2013 from: http://www.nrel.gov/vehiclesandfuels/energystorage/pdfs/jteâ2003-633âswâap.pdf. Purchase the best biodegradable, non-toxic, non-corrosive single-phase dielectric liquid coolants for full immersions cooling of electronics, CPUs, GPUs, FPGAs, ASICs, servers, batteries, and electric motors. Liquid Dielectric Coolants for Single-phase Liquid Immersion Cooling of electronics. 16-20, 2003, p. 1-7. Assignors: GM Global Technology Operations LLC. In the embodiment shown, arrows âAâ and âBâ indicate a flow of the dielectric coolant 28. FIG. Battery cells such as lithium-ion battery cells are known to generate heat during operation and as a result of a charge cycle when recharging. The temperature sensor 46 may be located anywhere within the battery cell stack 22 as desired. Dielectric Coolants for single-phase, liquid immersion cooling of batteries, electric motors, and energy storage. Extreme Automotive KERS systems, hydraulics, powertrain, permanently sealed systems with lubrication. The battery cell components are disposed inside the cavity of the plastic coated metal layer. The coolant 130 provides an external heat exchange with the vehicle, where the vehicle is a hybrid vehicle. Posted July 12, 2019 by Ryan Austin & filed under Newswire, The Tech . During operation, the coolant 28 flowing along the fluid channels 26 provides a substantially uniform surface temperature over each of the plurality of battery cells 20 while transferring heat away from each of the battery cells 20 by the flowing dielectric coolant 28. 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 Lithium Ion battery cooling system of, 16. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MCDONALD, STEPHEN S.;REEL/FRAME:027542/0445, Owner name: 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. Disconnect cables from terminals ALWAYS disconnect ground cable first and reconnect last Charge battery. The Lithium Ion battery cooling system of, 14. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Note also the relatively stable viscosity of the Dielectric fluid as temperatures range from 0 to 100 degrees Celsius. 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. 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. and U.S. patent application Ser. Cooling by flooding the battery with a dielectric oil which is then pumped out to a heat exchanger system. 10. Heat is removed from the system by circulating liquid into direct contact with hot … The container 14 is a closed and sealed container 14 for forming a self-contained liquid cooling system 10. 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 method includes the steps of providing a closed and sealed container 14. Owner name: A coolant temperature sensor 46 measures the dielectric coolant 28 temperature at the outlet 44 of the cooling element 38. 19. 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. 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. The cooling systems may include cooling plates or fins sandwiched between individual battery cells within the battery pack. The battery cells 20 are preferably stacked to form a battery cell stack 22. General duty stationary and vehicular battery, chargers, electric motor controllers, and associated systems cooling, Extreme duty stationary and vehicular battery, chargers, electric motor controllers, and associated systems cooling. It is understood that other heating element types may be used. 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. 1 is a schematic view of the battery cooling system of the present disclosure; and. A cooling element is disposed within the interior space and cools the dielectric fluid. 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. That brings us to Tesla’s patent application where it talks about using an engineered dielectric fluid for the cooling fluid. The lithium-ion battery is rechargeable and can be formed into a wide variety of shapes and sizes so as to efficiently fill available space in electric vehicles. Cooling by the circulation of water-based coolant through cooling passages within the battery structure. In this particular equipment design, when the oil temperature is 80 degrees C., the benefit of cooling with the Dielectric Fluid is approximately 8 degrees C. when compared with using a mineral oil. The dielectric fluid substantially immerses and is in contact with the battery assembly to heat and cool the battery assembly. A cooling element 38 is located at an upper area 40 of the container 14. A heating element is disposed within the interior space and heats the dielectric fluid. 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. The heating element 34 shown is an electronic heating element. When overheated or otherwise exposed to high-temperature environments, undesirable effects can impact the operation of lithium-ion batteries. As non-conductive fluids, MIVOLT fluids can come into direct contact with electronic components, which M&I says is a more effective method of heat removal … 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. The battery assembly 18 includes a plurality of battery cells 20 having fluid channels 26 formed between the stacked cells 20. 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