The JAS 39 Gripen fighter aircraft uses three EAP-12188 large thermal batteries for emergency electronics and/or hydraulic power in the event of a subsystem or main engine failure. The EAP-12188 battery uses the (LiSi/FeS2) electrochemistry. Ternary electrolyte and FE/KClO4 heat source are used in the battery. The EAP-12188 thermal battery has several advantages including operation at widely divergent temperature without heater power, fast rise times to full power, a high energy density, a long shelf life, maintenance-free design, as well as environmental and safety considerations. These advantages led to the selection of a thermal battery design over other electrochemistries, and over alternate systems such as hydrazine and methanol/oxygen. The battery, EAP-12188 is an Electrically-Activated Primary thermal battery, and was qualified in June 1994. This paper presents and evaluates subsequent lot acceptance test (LAT) performance data. To date, Eagle-Picher has tested 50 LAT batteries and delivered over 218 batteries for service use. No battery has failed to meet the specification requirements. Furthermore, performance has been very consistent over nine production lots of batteries. Battery data from both LAT batteries and daily engineering evaluation test batteries are analyzed and discussed herein.


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    Title :

    Performance update for large emergency aircraft thermal battery


    Additional title:

    Leistungsaktualisierung für eine große Flugzeug-Thermo-Notbatterie


    Contributors:
    Wells, J. (author) / Saltat, R. (author) / Lamb, C. (author)


    Publication date :

    1996


    Size :

    5 Seiten, 18 Bilder, 1 Tabelle, 2 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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