Author: CHarles C. Badcock
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
Book Description
Both government and industry were surveyed to determine the level of testing of nickel hydrogen (NiH2) battery cells and to evaluate the demonstrable capabilities of the couple. Only flight-type cells undergoing ground test were incorporated in the data base; no boilerplate cells or flight batteries were included. Both USAF-design and COMSAT-design cells, as well as a few cells produced by SAFT, were listed. The USAF design is in test in both high and low-earth-orbit simulations, whereas the COMSAT design, intended specifically for high-orbit applications, is being tested predominantly in high orbits. The data from over 400 cells show that the reliability and capability of both designs for high-orbit applications are reasonably established out to ten years in geosynchronous orbit, and to approximately 3000 cycles in other high-orbit applications. However, the data base is weak and incomplete for applications of the USAF cell in low earth orbit. This results from the harsh testing environment to which these cells have been subjected, as well as from various minor design questions that were not resolved when these cells began testing. It must also be pointed out that most of the testing data base is constructed from cells that were developmental in design or manufacture (all cells purchased for a test are used, even if their performance is questionable), as contrasted to a flight program where it can be assumed that many of the failures listed would have been rejected prior either to life test or their use in a flight battery.
Nickel Hydrogen Battery Cell Testing Data Base: An Industry and Government Survey
Author: CHarles C. Badcock
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
Book Description
Both government and industry were surveyed to determine the level of testing of nickel hydrogen (NiH2) battery cells and to evaluate the demonstrable capabilities of the couple. Only flight-type cells undergoing ground test were incorporated in the data base; no boilerplate cells or flight batteries were included. Both USAF-design and COMSAT-design cells, as well as a few cells produced by SAFT, were listed. The USAF design is in test in both high and low-earth-orbit simulations, whereas the COMSAT design, intended specifically for high-orbit applications, is being tested predominantly in high orbits. The data from over 400 cells show that the reliability and capability of both designs for high-orbit applications are reasonably established out to ten years in geosynchronous orbit, and to approximately 3000 cycles in other high-orbit applications. However, the data base is weak and incomplete for applications of the USAF cell in low earth orbit. This results from the harsh testing environment to which these cells have been subjected, as well as from various minor design questions that were not resolved when these cells began testing. It must also be pointed out that most of the testing data base is constructed from cells that were developmental in design or manufacture (all cells purchased for a test are used, even if their performance is questionable), as contrasted to a flight program where it can be assumed that many of the failures listed would have been rejected prior either to life test or their use in a flight battery.
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
Book Description
Both government and industry were surveyed to determine the level of testing of nickel hydrogen (NiH2) battery cells and to evaluate the demonstrable capabilities of the couple. Only flight-type cells undergoing ground test were incorporated in the data base; no boilerplate cells or flight batteries were included. Both USAF-design and COMSAT-design cells, as well as a few cells produced by SAFT, were listed. The USAF design is in test in both high and low-earth-orbit simulations, whereas the COMSAT design, intended specifically for high-orbit applications, is being tested predominantly in high orbits. The data from over 400 cells show that the reliability and capability of both designs for high-orbit applications are reasonably established out to ten years in geosynchronous orbit, and to approximately 3000 cycles in other high-orbit applications. However, the data base is weak and incomplete for applications of the USAF cell in low earth orbit. This results from the harsh testing environment to which these cells have been subjected, as well as from various minor design questions that were not resolved when these cells began testing. It must also be pointed out that most of the testing data base is constructed from cells that were developmental in design or manufacture (all cells purchased for a test are used, even if their performance is questionable), as contrasted to a flight program where it can be assumed that many of the failures listed would have been rejected prior either to life test or their use in a flight battery.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Energy Research Abstracts
The 1984 Goddard Space Flight Center Battery Workshop
Energy--new Frontiers
Author:
Publisher:
ISBN:
Category : Direct energy conversion
Languages : en
Pages : 614
Book Description
Publisher:
ISBN:
Category : Direct energy conversion
Languages : en
Pages : 614
Book Description
The ... NASA Aerospace Battery Workshop
The 1986 Goddard Space Flight Center Battery Workshop
Author: George Morrow
Publisher:
ISBN:
Category : Electric batteries
Languages : en
Pages : 400
Book Description
Publisher:
ISBN:
Category : Electric batteries
Languages : en
Pages : 400
Book Description
The 1990 NASA Aerospace Battery Workshop
Author: Lewis M. Kennedy
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 956
Book Description
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 956
Book Description