Electrical Characteristics of 18650 Li-Ion Cells at Low Temperatures

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Low temperature electrical performance characteristics of A and T, Moli, and Panasonic 18650 Li-ion cells are described. Ragone plots of energy and power data of the cells for different temperatures from 25 C to {minus}40 C are compared. Although the electrical performance of these cells at and around room temperature is respectable, at temperatures below 0 C the performance is poor. For example, the delivered power and energy densities of the Panasonic cells at 25 C are {approximately}800 W/l and {approximately}100 Wh/l respectively and those at {minus}40 C are <10 W/l and {approximately}5 Wh/l. In order to identify the source ... continued below

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21 p.

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Nagasubramanian, Ganesan August 5, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 92 times , with 10 in the last month . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Low temperature electrical performance characteristics of A and T, Moli, and Panasonic 18650 Li-ion cells are described. Ragone plots of energy and power data of the cells for different temperatures from 25 C to {minus}40 C are compared. Although the electrical performance of these cells at and around room temperature is respectable, at temperatures below 0 C the performance is poor. For example, the delivered power and energy densities of the Panasonic cells at 25 C are {approximately}800 W/l and {approximately}100 Wh/l respectively and those at {minus}40 C are <10 W/l and {approximately}5 Wh/l. In order to identify the source for this poor performance at subambient temperatures, both 2- and 3-electrode impedance studies were made on these cells. The 2-electrode impedance data suggests that the cell ohmic resistance remains nearly constant from 25 C to {minus}20 C but increases modestly at {minus}40 C while the overall cell impedance increases by an order of magnitude over the same temperature range. The 3-electrode impedance data of the A and T cells show that the increase in cell resistance comes mostly from the cathode electrolyte interface and very little either from the anode electrolyte interface or from the ohmic resistance of the cell. This suggests that the poor performance of the cells comes mainly from the high cathode/electrolyte interfacial impedance.

Physical Description

21 p.

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OSTI as DE00009500

Medium: P; Size: 21 pages

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  • Journal Name: Solid State Ionics; Other Information: Submitted to Solid State Ionics

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  • Report No.: SAND99-2048J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 9500
  • Archival Resource Key: ark:/67531/metadc794751

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  • August 5, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 7, 2017, 7:20 p.m.

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Nagasubramanian, Ganesan. Electrical Characteristics of 18650 Li-Ion Cells at Low Temperatures, article, August 5, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc794751/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.