Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Backup Battery cooling for Radio Base Stations
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Abstract [en]

Telecommunication systems are expanding around the world. From infrastructure networks to macro and pico systems, including RBS (Radio Base Station). To ensure the availability of RBS during a shortage on the electricity grid,EricssonABdeveloped BBS (Battery Base Stations) and BBU (Battery Base Units). The battery temperature is very critical to the battery life and the battery’s electrical performance. Taking energy efficiency and environmental issues in consideration, the need of a battery thermal management system increases. Therefore, sustainability is included to the core of this project.

The performance of VRLA (Valve Regulated Lead-Acid) backup batteries for telecommunication RBS can be greatly improved by keeping an adequate control of the battery temperature. A solid relation between temperature and battery lifetime exists, which urges the need to keep batteries around their optimal life and performance temperature; 25°C. Different ways of cooling currently used atEricssonABare presented in this paper, including different ways of improving the cooling system performance. By testing, the variation of battery temperature with different air gaps separating the batteries were monitored.

Other cooling methods, such as liquid cooling and PCM (Phase Change Materials) were also studied. Literature studies and test results showed a promising potential for such technologies to be granted green light to be used for future products. Tests were made to study the thermal conduction within battery cells. The efficiency of liquid cooling was tested as well; a cold plate heat exchanger was manufactured and used for the preliminary testing.

Place, publisher, year, edition, pages
2012. , 111 p.
Keyword [en]
Energiteknik
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-92033OAI: oai:DiVA.org:kth-92033DiVA: diva2:511901
External cooperation
Ericsson AB
Subject / course
Energy Technology
Educational program
Master of Science - Sustainable Energy Engineering
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-03-26 Created: 2012-03-23 Last updated: 2012-03-26Bibliographically approved

Open Access in DiVA

Master's Thesis - Chadi Beaini(3887 kB)3227 downloads
File information
File name FULLTEXT01.pdfFile size 3887 kBChecksum SHA-512
7637879c2f10f1f07eee78fa386103d6f163ba3b6385a7738593bd9b3f313f3d289ad3feb85da2f784efffbf489932f5f7f36c966ea7b1dc133de47d4ce8ca45
Type fulltextMimetype application/pdf

By organisation
Energy Technology
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 3227 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 873 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf