Three-dimensional thermal modeling of lithium-polymer batteries under galvanostatic discharge and dynamic power profile
- Lawrence Berkeley Lab., CA (United States). Materials Science Div. Univ. of California, Berkeley, CA (United States)
A three-dimensional model is developed to simulate and compare heat generation and transport within a lithium polymer electrolyte battery under galvanostatic discharges and a dynamic power profile [the Simplified Federal Urban Driving Schedule (SFUDS)]. Emphasis is placed on the maintenance of the operation temperature and temperature uniformity within a battery by designing a suitable thermal management system. The results indicate that the anisotropic thermal conductivity within the battery is an important factor influencing thermal performance and should be taken into consideration in battery design. On the one hand, because of the low effective thermal conductivity across a laminated cell stack, steep temperature distributions may be caused if cooling channels or electric heaters are placed at the two ends of a cell stack. On the other hand, the relatively large average thermal conductivity along the width and height directions allows more efficient heat removal or addition, and thus facilitates the maintenance of uniform operating temperature. Under the SFUDS power profile, the time-averaged heat generation rate is low, and therefore a high-performance insulation material is required to maintain the operating temperature. The thermal model has been applied to study the effectiveness of different arrangements of cooling channels and electric heaters and to select suitable heating intensities and insulating materials.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6676908
- Journal Information:
- Journal of the Electrochemical Society; (United States), Vol. 141:11; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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33 ADVANCED PROPULSION SYSTEMS
ELECTRIC BATTERIES
MATHEMATICAL MODELS
THERMAL ANALYSIS
ELECTRIC-POWERED VEHICLES
HEAT TRANSFER
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THERMAL INSULATION
THREE-DIMENSIONAL CALCULATIONS
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ENERGY TRANSFER
VEHICLES
250902* - Energy Storage- Batteries- Performance & Testing
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