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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.




Patent application: Respirator with phase change material

Ben Welter - Thursday, January 07, 2016

Respirator patent application drawingU.S. patent application 20160001101 (Scott Technologies Inc., Boca Raton, Fla.):

"A respirator includes a frame, a filter layer, and a face seal member. The frame has an outer side and an inner side. The frame defines an opening therethrough. The filter layer is mounted to the outer side of the frame and covers the opening of the frame. The filter layer is configured to prohibit permeation of aerosol, gas, and/or vapor contaminants therethrough. The face seal member is mounted to the inner side of the frame. The face seal member includes a seal contact area configured to engage a facial surface of a wearer. The face seal member incorporates a phase change material therein. The phase change material is configured to provide localized cooling by absorbing heat emitted by the wearer."

Patent application: Battery thermal management for hybrid electric vehicles using a PCM cold plate

Ben Welter - Thursday, January 07, 2016

U.S. patent application 20160006088 (applicant Embry-Riddle Aeronautical University, Fla.):

"A thermal management system for an energy storage device that includes a liquid-cooled cold plate made of phase-change material changeable from a substantially solid form to a substantially liquid form upon absorbing heat generated by the energy storage device. The system may be useful as a thermal management solution for energy storage systems (ESS) in hybrid-electric vehicles (HEV)."

Patent application: Nanometer molten salt heat-transfer and heat-storage medium

Ben Welter - Monday, January 04, 2016

U.S. patent application 20150376487 (Shenzhen Enesoon Science & Technology Co. Ltd., China):

"The present invention provides a nano molten salt heat transfer and heat storage medium, the method of preparation and the application, which belongs to the technical sector of heat storage and transfer. The nano molten salt heat transfer and heat storage medium of the invention means that the metal oxide nano-particles and/or non-metal oxide nano particles are dispersed in the conventional molten salt system to form the nano molten salt heat transfer and heat storage medium by composition. The heat transfer and heat storage medium provided by the invention has the good thermal stability and high thermal conductivity, which is ideally suited for industrial energy storage, thermal storage and transfer system of solar thermal power generation. ...

"The invention patent application 200910074994.0 of China discloses a villiaumite-based high-temperature phase change thermal storage composite material, which is obtained by mixing nano-sized gold particle, silver particle and copper particle into the high-temperature phase change villiaumite according to certain ratio."

Patent application: Thermally adaptive ductile concrete with PCM

Ben Welter - Monday, January 04, 2016

U.S. patent application 20150376489 (applicant: Regents of the University of Michigan, Ann Arbor, Mich.):

Concrete with PCM patent application SEM image"A thermally adaptive ductile concrete (PCM-ECC) having a tensile ductility ceramic with 5 times the thermal resistance, 2 times the specific heat capacity, and 400 times the tensile strain capacity of regular concrete. ... 

"A fiber-reinforced cementitious composite comprising: a binder of cement, pozzolanic material, and water; a plurality of uniformly distributed fibers at 1.5% to 3% of the total volume; fine aggregate; and a phase change material that changes a state of matter at a predetermined temperature."

Patent application: Device and method for heating a fermentable starting product to produce a beverage

Ben Welter - Thursday, December 31, 2015

U.S. patent application 20150376557 (inventor Albert Welledits, Vienna, Austria):

"A device and a method for heating a fermentable starting product in order to produce a beverage, comprises a line which is arranged inside a combustion chamber and via which a part of a heat outputted from a heat source in the combustion chamber by a first heat transporting medium can be transferred to the fermentable starting product flowing in the line. A heat storage device arranged downstream of the combustion chamber is used for storing a part of the residual heat transported by means of the first heat transporting medium. The line is arranged such that the fermentable starting product flowing in the line is pre-heated upstream of the combustion chamber in a pre-heating chamber by the heat stored in the heat storage device. ... [T]he heat storage device is formed as at least one latent heat storage device, in which a transfer of heat takes place from the heat transporting medium to a phase change material in the latent heat storage device, or vice versa."

Patent application: Cordless tool system with PCM

Ben Welter - Thursday, December 31, 2015

U.S. patent application 20150380958 (inventor Dezhong Yang, et al, China):

"A tool discharges one battery pack and a charger simultaneously charges another battery pack to provide for continuous and circular operation of the tool. Tool system includes a tool and a lithium based battery pack having a nominal voltage of at least 56 volts for supplying power to the tool. A heat absorbing device is associated with the battery pack and includes a phase-change material."

Patent application: Method for bonding a tail of web material using nonadhesive PCM

Ben Welter - Thursday, December 31, 2015

U.S. patent application 20150375951 (applicant Procter & Gamble Co., Cincinnati, Ohio): 

PG patent application drawing"A method for bonding the tail of a convolutely wound log to the body is provided. The method comprises the use of a nonadhesive phase-change material to mechanically bond the tail to the wound log. The nonadhesive phase-change material is heated to an amorphous state prior to its application. Once applied to the wound log, the nonadhesive phase-change material mechanical bonds with the tail and wound log and as heat is lost, changes to a non-amorphous state. The mechanical bond can be selectively reversed through the application of a strength degradation accelerator."

Patent application: Method of producing a device for storing thermal energy by solid/solid phase change material

Ben Welter - Wednesday, December 30, 2015

U.S. patent application 20150369542 (applicant French Alternative Energies and Atomic Energy Commission):

"The invention relates to a method for producing a thermal energy storage device by means of at least one solid/solid phase change material, comprising a thermal energy storage chamber containing the at least one solid/solid phase change material and a heat exchanger of the heat-transfer fluid type for storing and extracting heat of said s/s PCM immersed in said chamber. The invention will find its application in the field of the storage of thermal energy and for example for the application of storing heat in an urban or industrial heat system."

Patent application: Cover assembly for temperature-sensitive cartons or articles

Ben Welter - Wednesday, December 30, 2015

U.S. patent application 20150367604 (applicant Grand Designs Inc., Sacramento, Calif.):

"Temperature protection assemblies designed to protect objects against undue temperature changes during shipping or storage, comprise a first layer configured to be placed proximal to the object and include phase change material, together with a second layer configured to be placed over the first layer and remote from the object, the second layer comprising a heat-reflecting material. The assemblies may be designed to protect a single carton or a pallet load thereof and, in such cases, the layers are in the form of open-bottom covers, which can be fitted over the carton or pallet load in closely-conforming relationship, with the first layer adjacent the carton or load, and the second layer  telescoped over the first layer. The covers may be interconnected to form a unitary assembly."

Patent application: Particulate microcapsule composition

Ben Welter - Thursday, December 17, 2015

U.S. patent application 20150361227 (applicant BASF SE, Ludwigshafen, Germany):

"The present invention relates to particulate microcapsule compositions comprising microcapsules and an emulsion polymer, obtainable via spray drying of an aqueous microcapsule dispersion, where the microcapsules comprise a capsule core and a polymer as capsule wall and the polymer is composed of from 30 to 90% by wt. of one or more monomers (monomers I) from the group consisting of C1-C24-alkyl esters of acrylic and/or methacrylic acid, acrylic acid, methacrylic acid, and maleic acid."