The thermal management of valve regulated lead-acid (VRLA) batteries when used in electric (EV) or hybridelectric (HEV) vehicles is critical to the battery's long term reliability and performance. The traditional method for controlling and minimising temperature variation within compact EV or HEV batteries has been through the use of pumped liquids. However, this method has a number of disadvantages, i.e. increased design complexity, the addition of extra weight due to the circulation and containment system, increased manufacturing costs and service requirements. An alternative to this liquid method is the use of phase change materials (PCMs) which absorb and store thermal energy, for later release, through a change in the material's physical state, i.e. solid to liquid or liquid to gas. A classic example of this energy absorption through phase change is the melting of ice into water which occurs without an increase in temperature. In an on-going joint development program the use of PCMs for thermal stabilisation within an HEV battery is being investigated by Hawker Energy Products Ltd., manufacture's of VRLA batteries; SHAPE Inc., suppliers of inorganic salt hydrate based PCMs; and Rover ATC, the advanced technology development group of UK based car manufacturer Rover.
Thermal management for hybrid-electric vehicle valve-regulated lead-acid batteries
Wärmemanagement bei ventilgeregelten Bleiakkumulatoren für Elektro- oder Hybridfahrzeuge
1994
11 Seiten, 7 Bilder, 6 Tabellen, 2 Quellen
Conference paper
English
Thermal Management for Hybrid Electric Vehicle Valve-Regulated Lead-Acid Batteries
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