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Battery Entropic Heating Coefficient Testing and Use in Cell-level Loss Modeling for Extreme Fast Charging

FCA US LLC-Pawel Malysz, Oliver Gross
McMaster Automotive Resource Centre-Jeremy Lempert, Phillip Kollmeyer, Ali Emadi
  • Technical Paper
  • 2020-01-0862
To be published on 2020-04-14 by SAE International in United States
To achieve an accurate estimate of losses in a battery it is necessary to consider the reversible entropic losses, which may constitute over 20% of the peak total loss. In this work, a procedure for experimentally determining the entropic heating coefficient of a lithium-ion battery cell is developed. The entropic heating coefficient is the rate of change of the cell’s open-circuit voltage (OCV) with respect to temperature; it is a function of state-of-charge (SOC) and temperature and is often expressed in mV/K. The reversible losses inside the cell are a function of the current, the temperature, and the entropic heating coefficient, which itself is dependent on the cell chemistry. The total cell losses are the sum of the reversible and irreversible losses, where the irreversible losses consist of ohmic losses in the electrodes, ion transport losses, and other irreversible chemical reactions. The entropic heating coefficient is determined by exposing the cell to a range of temperatures at each SOC value of interest. The OCV is recorded at each combination of SOC and temperature, and ∂OCV/∂T…
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Steel, Sheet, Strip, and Plate 0.95Cr - 0.20Mo - (0.30 - 0.35C) (4132)

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMS6356J
  • Current
Published 2020-03-18 by SAE International in United States
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
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Hybrid Technique Aims to Produce Stronger, Corrosion-Resistant Nickel

  • Magazine Article
  • TBMG-36277
Published 2020-03-01 by Tech Briefs Media Group in United States

Nickel is a widely used metal in the manufacturing industry for both industrial and advanced material processes. Now, Purdue University innovators have created a hybrid technique to fabricate a new form of nickel that may help the future production of life-saving medical devices, as well as hightech devices and vehicles with strong corrosion-resistant protection.

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Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 74Ni - 7.0Cr - 16.5Mo Solution Heat Treated

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5771G
  • Current
Published 2020-02-25 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings.
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Steel Sheet, Strip, and Plate 0.80Cr - 1.8Ni - 0.25Mo (0.49 - 0.55C) Annealed

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMS6396G
  • Current
Published 2020-02-18 by SAE International in United States
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
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Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 60.5Ni - 23Cr - 14Fe - 1.4Al Annealed

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5715G
  • Current
Published 2020-02-17 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of bars, forgings, and flash welded rings 4.00 inches (101.6 mm) and under in least nominal cross section, and stock of any size for forging or flash welded rings (see 8.5).
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CONNECTORS, RECEPTACLE, ELECTRICAL, BOX MOUNTING, SOLDER CONTACT, HERMETIC, AN TYPE

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS31421A
  • Current
Published 2020-02-14 by SAE International in United States
No Abstract Available.
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Tin Plated Solderless Terminal Lugs and Splices on Nickel Coated High Temperature Wire

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AIR1263A
  • Current
Published 2020-02-03 by SAE International in United States

This publication formally cautions against terminating nickel coated wire with tin plated insulated or uninsulated crimped solderless terminations.

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CONNECTOR, RECEPTACLE, ELECTRIC, CRIMP TYPE, WALL MOUNTING FLANGE, PUSH-PULL COUPLING, SERIES 3 (CLASS L AND E)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS34241A
  • Current
Published 2020-01-23 by SAE International in United States
No Abstract Available.
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A cutting-edge technology to increase the friction coefficient in bolted joints in a simple way

3M do Brasil-Vanessa de Souza Valério, Rosana Emi Tamagawa, Kellen Cristina Busiol, Petrus Lencioni Filho
  • Technical Paper
  • 2019-36-0236
Published 2020-01-13 by SAE International in United States
Lightweight vehicles are one of the most efficient solutions to reduce the fuel consumption and the emission of polluting gases, which leads the automotive industry to the constant need to manufacture ever lighter vehicles. Due to these current requirements, there is a general move toward compact and lightweight powertrain system designs. Although more compact, these systems must be able to transmit the same or even higher forces and torques. Dealing with these contradictory requirements adding to the constant request to minimize production and assembly costs is a huge challenge to engineers. One approach is to enhance the coefficient of static friction in friction joints. When friction joints are designed, physical parameters such as overall size and surface pressure usually can only be varied in a tight window. Load transmission capability in friction joints is thus limited by the friction coefficient of the mating materials. An efficient solution for these limitations is to apply a nickel diamond coating either to the actual parts of the joints or to friction shims for installation in the joint. In…
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