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The award-winning Phase Change Matters blog tracks the latest news and research on phase change materials and thermal energy storage. E-mail tips and comments to Ben Welter, communications director at Entropy Solutions. Follow the blog on Twitter at @PureTemp. Subscribe to the weekly PCM newsletter. Or join the discussion on LinkedIn.

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Patent application: Motor vehicle fuel pump cover

Ben Welter - Friday, May 24, 2019

BMW patent drawingU.S. patent application 20190153984 (applicant Bayerische Motoren Werke AG, Munich, Germany):

"A motor vehicle fuel pump cover is provided for covering a fuel guide region of a motor vehicle fuel pump by way of a cover housing. A phase change core is received in the cover housing. The phase change core is designed to change the phase state thereof while receiving thermal energy from the fuel guide region. The phase change core is designed for phase change at a temperature of more than 60° C."

http://www.freepatentsonline.com/20190153984.pdf

Patent application: Methods and systems for energy recovery via an EGR cooler

Ben Welter - Friday, May 17, 2019

U.S. patent application 20190145359 (assignee Ford Global Technologies LLC, Dearborn, Mich.):

"Methods and systems are provided for an EGR [exhaust gas recirculation] cooler comprising a phase-change material. In one example, exhaust gas may be conducted through the EGR cooler when an engine is deactivated to maintain an engine temperature. ... The phase-change material may extract heat from the hot exhaust gas conducted through the cooler, and thus serves as an additional heat sink but also as an energy store. In other words, the cooler equipped with the phase-change material according to the disclosure may extract more energy from the exhaust gas than a conventional cooler which uses only coolant. This offers advantages in the case of large exhaust-gas quantities which occur at high engine speeds or loads, and in particular at the high exhaust-gas temperatures which occur at high loads."

http://www.freepatentsonline.com/20190145359.pdf

Patent application: Heat exchanger for an exhaust tuning system

Ben Welter - Monday, April 29, 2019

U.S. patent application 20190120103 (applicant Ford Global Technologies, Dearborn, Mich.):

"Methods and systems are provided for a heat exchanger phase change material installed as a component of a variable exhaust tuning system. In one example, a method may include absorbing excess heat energy from exhaust gases during and after an engine-on event within a heat exchanger material, releasing heat energy stored in the heat exchanger material during and after an engine-off event, and heating an adjustable exhaust valve with the heat energy stored in the heat exchanger material."

http://www.freepatentsonline.com/20190120103.pdf

Patent application: Air-conditioning system

Ben Welter - Friday, April 19, 2019

U.S. patent application 20190113259 (applicant Ford Global Technologies LLC, Dearborn, Mich.):

"An air-conditioning system includes first and second PCM vessels, a heat recovery circuit, and a conduit and valve system. The heat recover circuit includes a third PCM vessel. The conduit and valve system operably couples i.) a first heat exchanger to the first PCM vessel and a radiator, ii.) a second heat exchanger to a core and the second PCM vessel, and iii.) the heat recovery circuit to the first heat exchanger."

http://www.freepatentsonline.com/20190113259.pdf

Patent application: PCM reservoir equipped with filling tube for a motor vehicle heat exchanger

Ben Welter - Friday, March 08, 2019

U.S. patent application 20190072304 (applicant Valeo Systemes Thermiques, Le Mesnil St. Denis, France):

"The invention relates to a phase-change material reservoir for a heat exchanger of an air-conditioning installation of a vehicle, the reservoir being arranged between two reservoir plates and having filling means, characterized in that the filling means include at least one tube delimiting a filling channel arranged outside the reservoir against a first plate of the reservoir."

http://www.freepatentsonline.com/20190072304.pdf

Patent application: Exhaust system with actuated flow bypass

Ben Welter - Friday, February 15, 2019

U.S. patent application 20190053330 (Watlow Electric Manufacturing Co., St. Lous, Mo.):

"An exhaust system is provided that includes an exhaust aftertreatment unit, first and second exhaust pathway in communication with and upstream of the exhaust aftertreatment unit, a thermally activated flow control device operable in a first and second mode, and a thermal storage device. ... The thermal storage device or thermal flywheel may also include a phase change material, an in one form a phase change material that changes phase at a temperature between 180° C. and 45° C."

http://www.freepatentsonline.com/20190053330.pdf

Patent application: Thermal kinetic energy recovery system for hybrid vehicle

Ben Welter - Monday, January 28, 2019

U.S. patent application 20190023113 (applicant Eaton Corp., Cleveland, Ohio):

"A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a waste heat recovery (WHR) system, a brake assembly and a phase-change thermal heat storage system. The WHR system selectively circulates a WHR fluid in the transmission system. The brake assembly selectively couples a transmission output shaft to a drive axle. The brake assembly is configured to operate in a braking mode that retards relative rotation between the transmission output shaft and the drive axle while generating heat. The heat storage system includes a housing defining at least one cavity and a fluid transfer manifold. A phase-change material is disposed in the cavity that is configured to change phase during the braking mode."

http://www.freepatentsonline.com/20190023113.pdf

Patent application: Heat exchanger with PCM

Ben Welter - Thursday, January 03, 2019

U.S. patent application 20190003369 (applicant Castrol Ltd., Pangbourne, Great Britain):

"In one embodiment, there is provided a heat exchanger for equipment, having: at least one phase change material; and at least one heat exchange interface for heat exchange between the phase change material and a fluid flowing within, into and/or from a replaceable fluid container for the equipment, the replaceable fluid container having at least one fluid port adapted to couple to a fluid circulation system of the equipment when the replaceable container is coupled to a dock."

http://www.freepatentsonline.com/20190003369.pdf

Patent application: Cooling device for charging station

Ben Welter - Thursday, November 29, 2018

U.S. patent application 20180334049 (applicant Porsche AG, Stuttgart, Germany):

"A cooling device cools a charging station or a multiplicity of charging stations of a charging park. The respective charging station has an internal coolant duct for a coolant to flow through the charging station, an input-side coolant connection, an output-side coolant connection, a coolant circuit with a cooling assembly for cooling the coolant, and a pump for pumping the coolant in the coolant circuit. The coolant duct of the respective charging station is integrated into the coolant circuit. A heat accumulator or a multiplicity of heat accumulators is integrated into the coolant circuit."

http://www.freepatentsonline.com/20180334049.pdf

Patent application: Cables made of phase change material

Ben Welter - Thursday, November 29, 2018

U.S. patent application 20180334775 (applicant E.I. du Pont de Nemours and Co., Wilmington, Del.):

"A phase change material (PCM) is useful for thermal management in various applications such as automotive, building, packaging, garments, and footwear, and in devices such as wires and cables. The cable described herein comprises a core and a PCM layer surrounding the core. The PCM layer comprises a PCM composition, which in turn comprises a 1,3-propanediol fatty acid ester. The core consists of a yarn, strand or wire made of a natural or synthetic polymeric material or a metal."

http://www.freepatentsonline.com/20180334775.pdf