Patents Assigned to University of Colorado At Boulder
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Patent number: 11596088Abstract: A cold plate having a manifold includes a recess extending from a first side to a second side of the manifold, where the recess includes openings to the recess positioned lengthwise along the first side and a single opening to the recess on the second side, an inlet and an outlet fluidly coupled to the recess, a plurality of plates fastened to the first side enclosing the openings, a heat sink fastened to the second side enclosing the single opening on the second side, and a plurality of fluid cores one of each positioned between each of the plurality of plates and the heat sink. The plurality of fluid cores include a flow distribution insert, a first plate fin positioned between the flow distribution insert and the heat sink fastened to the second side, and a second plate fin positioned between the flow distribution insert and the heat sink.Type: GrantFiled: January 29, 2021Date of Patent: February 28, 2023Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., UNIVERSITY OF COLORADO BOULDERInventors: Feng Zhou, Ercan Mehmet Dede, Hiroshi Ukegawa, Robert Erickson, Dragan Maksimovic, Vivek Sankaranarayanan, Yucheng Gao
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Patent number: 11545297Abstract: Embodiments of the disclosure relate to apparatuses for enhanced thermal management of an inductor assembly using functionally-graded thermal vias for heat flow control in the windings of the inductor. In one embodiment, a PCB for an inductor assembly includes a top surface and a bottom surface. Two or more electrically-conductive layers are embedded within the PCB and stacked vertically between the top surface and the bottom surface. The two or more electrically-conductive layers are electrically connected to form an inductor winding. A plurality of thermal vias thermally connects each of the two or more electrically-conductive layers to a cold plate thermally connected to the bottom surface. A number of thermal vias thermally connecting each electrically-conductive layer to the cold plate is directly proportional to a predetermined rate of heat dissipation from the electrically-conductive layer.Type: GrantFiled: November 22, 2019Date of Patent: January 3, 2023Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., UNIVERSITY OF COLORADO BOULDERInventors: Ercan Dede, Yucheng Gao, Vivek Sankaranarayanan, Aritra Ghosh, Robert Erickson, Dragan Maksimovic
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Publication number: 20220393485Abstract: An apparatus includes a battery pack with N battery bricks, each with a DC output voltage. The output of each brick is connected in series providing a bus voltage. Each brick includes battery power modules (“BPMs”) connected in parallel and each connected to a battery cell. Each BPM charges/discharges the connected battery cell. Each brick has a battery brick controller that provides a control signal to each brick's BPMs. A control signal of a BPM is derived from a BPM error signal that includes a battery cell current of the battery cell of BPM subtracted from a summation of an average current signal, a local droop current and a balancing current. The balancing current is based on a current SOC of the battery cell connected to the BPM and a desired SOC for the battery cell connected to the BPM. A BMS derives the balancing current for the BPMs.Type: ApplicationFiled: November 18, 2021Publication date: December 8, 2022Applicants: Utah State University, University of Colorado BoulderInventors: Mohamed Ahmed Kamel Ahmed, Regan A. Zane, Dragan Maksimovic
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Publication number: 20220386509Abstract: A double-sided cold plate includes a manifold comprising openings extending from a first surface of the manifold through the manifold to a second surface of the manifold forming recesses within the manifold and an inlet channel and an outlet channel fluidly coupled to the recesses within the manifold, a plurality of first heat sinks coupled to the first surface of the manifold enclosing the openings on the first surface, and a plurality of second heat sinks positioned adjacent each other along a length of the manifold and coupled to the second surface of the manifold, enclosing the openings on the second surface, a width of the plurality of second heat sinks is greater than a width of the manifold thereby forming an overhanging portion on each lengthwise side of the manifold, the overhanging portion configured to mechanically support a plurality of electrical components positioned around a perimeter of the manifold.Type: ApplicationFiled: May 25, 2021Publication date: December 1, 2022Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., University of Colorado BoulderInventors: Feng Zhou, Yuqing Zhou, Ercan Mehmet Dede, Robert Erickson, Dragan Maksimovic, Vivek Sankaranarayanan, Yucheng Gao
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Publication number: 20220248560Abstract: A cold plate having a manifold includes a recess extending from a first side to a second side of the manifold, where the recess includes openings to the recess positioned lengthwise along the first side and a single opening to the recess on the second side, an inlet and an outlet fluidly coupled to the recess, a plurality of plates fastened to the first side enclosing the openings, a heat sink fastened to the second side enclosing the single opening on the second side, and a plurality of fluid cores one of each positioned between each of the plurality of plates and the heat sink. The plurality of fluid cores include a flow distribution insert, a first plate fin positioned between the flow distribution insert and the heat sink fastened to the second side, and a second plate fin positioned between the flow distribution insert and the heat sink.Type: ApplicationFiled: January 29, 2021Publication date: August 4, 2022Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., University of Colorado BoulderInventors: Feng Zhou, Ercan Mehmet Dede, Hiroshi Ukegawa, Robert Erickson, Dragan Maksimovic, Vivek Sankaranarayanan, Yucheng Gao
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Publication number: 20210399352Abstract: An apparatus for voltage sharing of series connected battery modules in a DC microgrid includes a battery management system and a battery module controller that generates, for an mth of N converters connected together to a DC microbus, a droop current ?d,m that includes a converter voltage error signal {tilde over (v)}err,m multiplied by a droop multiplier gd(i). Each converter is a DC/DC converter connected between a battery module, with one or more battery cells, and the DC microbus. The mth converter uses the droop current ?d,m, a common current reference ?all of a battery pack that includes the battery modules and an input current ?m to the mth converter to control switching of the mth converter. The common current reference ?all is from the battery management system. The voltage error signal {tilde over (v)}err,m is based on an output voltage {tilde over (v)}o,m of the mth converter and an average converter output voltage {tilde over (v)}avgeodcmastereodcmastereodcmaster.Type: ApplicationFiled: June 17, 2021Publication date: December 23, 2021Applicants: Utah State University, University of Colorado BoulderInventors: Mohamed Ahmed Kamel Ahmed, Regan Zane, Dragan Maksimovic
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Patent number: 11104699Abstract: Aspects of the present disclosure include compositions that make use of phosphorus and/or nucleobase protecting groups which find use in the synthesis of long polynucleotides. Phosphorus protecting groups are provided that help increase the stepwise coupling yield and/or phosphorous protecting groups that can be removed during the oxidation step. Amidine nucleobase protecting groups are provided that find use in the subject compositions and methods which provides for e.g., increased resistance to depurination during polynucleotide synthesis. In some instances, the methods and compositions disclosed herein utilize a combination of the phosphorus and amidine nucleobase protecting groups in the synthesis of polynucleotides having a sequence of 200 or more monomeric units in length. Also provided are methods for synthesizing a polynucleotide (e.g., a DNA) using one or more compounds disclosed herein.Type: GrantFiled: October 29, 2018Date of Patent: August 31, 2021Assignees: Agilent Technologies, Inc., University of Colorado BoulderInventors: Douglas J. Dellinger, Luca Monfregola, Marvin Caruthers, Mithun Roy
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Publication number: 20210159007Abstract: Embodiments of the disclosure relate to apparatuses for enhanced thermal management of a planar inductor assembly. In one embodiment, a cooling package for an inductor assembly includes a cold plate and a heat-spreading bracket mechanically coupled to the cold plate at a first end of the heat-spreading bracket. The cold plate has a slotted recess for mounting a first inductor core along a first end thereof. The heat-spreading bracket is configured to apply a clamping force to a second inductor core at a second end opposite to the first end of the heat-spreading bracket.Type: ApplicationFiled: November 22, 2019Publication date: May 27, 2021Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., University of Colorado BoulderInventors: Ercan M. DEDE, Tsuyoshi NOMURA, Robert ERICKSON, Dragan MAKSIMOVIC, Vivek SANKARANARAYANAN, Yucheng GAO, Aritra GHOSH
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Publication number: 20200388432Abstract: Embodiments of the disclosure relate to apparatuses for enhanced thermal management of an inductor assembly using functionally-graded thermal vias for heat flow control in the windings of the inductor. In one embodiment, a PCB for an inductor assembly includes a top surface and a bottom surface. Two or more electrically-conductive layers are embedded within the PCB and stacked vertically between the top surface and the bottom surface. The two or more electrically-conductive layers are electrically connected to form an inductor winding. A plurality of thermal vias thermally connects each of the two or more electrically-conductive layers to a cold plate thermally connected to the bottom surface. A number of thermal vias thermally connecting each electrically-conductive layer to the cold plate is directly proportional to a predetermined rate of heat dissipation from the electrically-conductive layer.Type: ApplicationFiled: November 22, 2019Publication date: December 10, 2020Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., University of Colorado BoulderInventors: Ercan DEDE, Yucheng GAO, Vivek SANKARANARAYANAN, Aritra GHOSH, Robert ERICKSON, Dragan MAKSIMOVIC
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Publication number: 20030085214Abstract: A ceramic micro-glow plug made from three primary constituents, silicon, carbon and nitrogen by forming a precursor liquid polymer in a mold or by photolithograpy, drying, pyrolizing and annealing. A U-shaped design with two arms joined at thin tip, and the composition of the silicon carbon-nitride ceramic allow the tip to reach a high operating temperature with a minimum power applied across the electrical contacts. When the tip is at the highest operating temperature, the remainder of the structure remains relatively cool. In an embodiment, an additional component such as boron is added to the silicon carbon-nitride to increase the electrical conductivity of the micro-glow plug. In another embodiment, a plurality of micro-glow plugs are attached to a body wherein when the operational micro-glow plug fails, the next successive micro-glow plug receives power across its electrical contacts.Type: ApplicationFiled: November 7, 2001Publication date: May 8, 2003Applicant: University of Colorado At BoulderInventors: Li-Anne Liew, Rishi Raj