Conservation

Battery Technology Handbook by H.A. Kiehne

By H.A. Kiehne

The main finished advisor to the basic theories, recommendations, and techniques applied for battery operation and layout. retains experts proficient of the present country of the sphere with new and revised chapters concentrating on the security, functionality, caliber, and enhancement of assorted batteries and battery structures. contains a broad rage of examples, dimensions, and requirements for transparent knowing of the subject.

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16. A corresponding situation with all the arrows reversed would apply for heat absorption from a warmer surroundings. Copyright © 2003 by Expert Verlag. All Rights Reserved. 16 The various ways of heat escape from the battery. Three mechanisms are involved in this heat exchange: 1. 2. 3. Heat radiation. g. through the components of the battery and the container wall. Heat transport by a cooling or heating medium. Usually they occur in combination. 16 indicates that cooling of batteries mostly occurs via their side walls.

Through the components of the battery and the container wall. Heat transport by a cooling or heating medium. Usually they occur in combination. 16 indicates that cooling of batteries mostly occurs via their side walls. The bottom surface usually is in contact with the basis that attains the same temperature as the battery itself, except the battery is equipped with cooling channels in the bottom. The upper surface usually is of little importance for heat exchange, since the lid has no direct contact to the electrolyte, and the intermediate layer of gas hinders heat exchange because of its low heat conductivity (cf.

F ð33Þ V as ‘calorific voltage’ (or thermoneutral potential Etp (12)). Ucal is a hypothetical voltage that includes the reversible heat effect, and is used instead of the equilibrium voltage for caloric calculations. Combination with Eqs. g. Eq. (41)). 2 Current Related Heat Effects (Joule Heating) Current flow through any conducting object generates heat proportional to the voltage drop caused by the current itself according to dQJoule =dt ¼ DU ? i ð35Þ with Qj: generated heat (Joule effect) (J); t: time (s); DU: voltage drop caused by the current (V); i: current (A).

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