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The characteristics and limitations of the MPS/MMS battery charging systemA series of tests was conducted on two 12 ampere hour nickel cadmium batteries under a simulated cycle regime using the multiple voltage versus temperature levels designed into the modular power system (MPS). These tests included: battery recharge as a function of voltage control level; temperature imbalance between two parallel batteries; a shorted or partially shorted cell in one of the two parallel batteries; impedance imbalance of one of the parallel battery circuits; and disabling and enabling one of the batteries from the bus at various charge and discharge states. The results demonstrate that the eight commandable voltage versus temperature levels designed into the MPS provide a very flexible system that not only can accommodate a wide range of normal power system operation, but also provides a high degree of flexibility in responding to abnormal operating conditions.
Document ID
19810007871
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Ford, F. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Palandati, C. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Davis, J. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tasevoli, C. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
November 1, 1980
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
NASA-TM-81983
Accession Number
81N16387
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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