DIODE CONTROL RESEARCH.

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Abstract:

A review of the scope of the development program, the approach being followed, and the work accomplished during the first four quarters toward the development of stabistor diode charge control systems for spacecraft batteries is presented. A simplified but versatile sensing and control circuit was developed to control the charge current in relation to stabistor diode temperature. Initial 90 minute cycling at 25 C was accomplished using the circuit and 12 AH nickel-cadmium sealed spacecraft cells protected by stabistors. Charge voltage measurements were made on silver-zinc sealed spacecraft cells at 25 C. The forward voltages of 60 to 160 mil square stabistor diodes were characterized with respect to junction size. A method of using the diode as an isolated by high impedance charge control element for a cell was tested and found to be moderately effective over a temperature range from 0 to 50 C. Author

Author(s):
Ball, James V.
Author Organization(s):
MALLORY (P R) AND CO INC BURLINGTON MA LAB FOR PHYSICAL SCIENCE
Descriptive Note:
Quarterly technical progress rept. no. 4, 1 Mar-1 Jun 67,
Pagination:
0038

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
AF 33(615)-3702
Task Number(s):
817304
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*SEMICONDUCTOR DIODES), (*STORAGE BATTERIES, TEMPERATURE, NICKEL, CADMIUM, ELECTRIC DISCHARGES, ZINC, SILVER, VOLTAGE, ELECTRICAL IMPEDANCE, SPACECRAFT, AIRCRAFT, HEAT SINKS, SIMULATION, SOLAR CELLS, LEAKAGE(ELECTRICAL)
Field(s)/Group(s):
Electrical and Electronic Equipment, Electrochemical Energy Storage
Keyword(s):
SEMICONDUCTOR JUNCTIONS, STABISTORS
Report Date:
1967 Jun 01