NDLI: Battery thermal management system

Content Provider	IEEE Xplore Digital Library
Author	Cosley, M.R. Garcia, M.P.
Copyright Year	2004
Abstract	Most VRLA batteries used in telecommunications applications are designed to operate in an indoor environment of 25/spl deg/ C. When placed in an outdoor environment, the batteries must be heated to prevent loss of capacity and must be ventilated to avoid build-up of hydrogen gas that occurs during charging that isn't properly controlled. The most difficult problem is maintaining the 25/spl deg/ C ambient temperature of the battery in an outdoor environment that can easily exceed 46/spl deg/ C. AH current commercial solutions (thermoelectric, air conditioners, thermosyphons, PCM) require at least additional valuable site space to house the batteries as well as the expense and reliability issues associated with remote cabling, alarming and monitoring. We focused on the fact that the battery represents a large thermal mass and typically has different conductivities in all three directions due to the nature of their construction to develop a split cooling system that can keep the batteries at 25/spl deg/ C +/-2/spl deg/ C via direct contact cooling. This avoids the inefficiency of air mover based systems that monitor and control the unit based off the airflow of the cooler itself. The issue of heating in cold ambient conditions, as well as, hydrogen outgassing is also addressed. The system can be used stand-alone or integrated into existing enclosures. Field performance data will be presented and discussed.
Sponsorship	Power Electron. Soc. of the Inst. of Electr. and Electron. Eng
Starting Page	38
Ending Page	45
File Size	640793
Page Count	8
File Format	PDF
ISBN	078038458X
DOI	10.1109/INTLEC.2004.1401442
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal management Battery management systems Hydrogen Temperature control Thermal conductivity Cooling Indoor environments Telecommunication control Maintenance Thermoelectricity
Content Type	Text
Resource Type	Article

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