Download Battery Systems Engineering by Christopher D. Rahn PDF

Repair Maintenance

By Christopher D. Rahn

ISBN-10: 1119979501

ISBN-13: 9781119979500

Content material:
Chapter 1 creation (pages 1–10):
Chapter 2 Electrochemistry (pages 11–22):
Chapter three Governing Equations (pages 23–48):
Chapter four Discretization tools (pages 49–87):
Chapter five approach reaction (pages 89–118):
Chapter 6 Battery procedure versions (pages 119–160):
Chapter 7 Estimation (pages 161–189):
Chapter eight Battery administration platforms (pages 191–229):

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Additional info for Battery Systems Engineering

Sample text

Charging typically consists of periods of constant current (CC) and/or constant voltage (CV) charging. 7 shows an example CC–CV charging profile for a Pb–acid battery. Initially, when the battery has a low SOC, a CC charge is applied to bring the voltage up to the CV level. If the CV charge is applied during this initial phase, the current will be too high and side reactions or excessive temperature rise will result. Once the desired voltage level has been achieved, the charger switches to CV mode and the current decreases as the battery reaches 100% SOC.

64) where ref is the property value defined at the reference temperature Tref = 25 ◦ C. The activation energy E act (J/mol) controls the temperature sensitivity of each individual property . 2 Conservation of Energy As a first approximation, the temperature is assumed to be uniform throughout the cell at T (t). 65) Governing Equations 41 where h (W/(m2 K)) is the heat transfer coefficient for forced convection, As is the cell surface area exposed to the convective cooling medium (typically air), T∞ is the free stream temperature of the cooling medium, and C p (J/K) is the heat capacity of the cell.

Here, we assume that the electrode is composed of only two phases, solid and electrolyte, so that εe = 1 − εs = ε. In some cases, it may be necessary to define separate electrolyte εe and solid εs phase porosities if there are active particles embedded in an inactive matrix or inactive fillers/binders in the electrode. For active spherical particles embedded in the electrode, as = 3εs /Rs , where Rs is particle radius. One can also think of σ eff as the conductivity that one would measure across the electrode if the electrolyte were removed.

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