GPS on-orbit battery performance
Abstract
Three batteries designed for the GPS system were evaluated. The batteries were wired together, and during the eclipse period were discharged through parallel diodes into a boost converter which then boosted the battery voltage up to the totally regulated bus voltage. Each battery, with a system life of approximately five years, had its own charger. During testing the battery was maintained or used on trickle charge. Data are presented for the battery capacity during the reconditioning. Raw data for each eclipse period and calculations for the average discharge voltage for each battery are given. Thermal cycling for one of the batteries and reconditioning cycles and regimes for all of the batteries are discussed. A reconditioning discharge curve is also given. The problem of temperature cycling in one of the batteries was resolved by redesigning the battery radiator system.
- Publication:
-
The 1981 GSFC Battery Workshop
- Pub Date:
- March 1982
- Bibcode:
- 1982batt.work..341K
- Keywords:
-
- Battery Chargers;
- Degradation;
- Electric Batteries;
- Energy Storage;
- Service Life;
- Spacecraft Power Supplies;
- Thermal Cycling Tests;
- Auxiliary Power Sources;
- Bus Conductors;
- Capacitance;
- Diodes;
- Eclipses;
- Electric Current;
- Electric Discharges;
- Electrical Measurement;
- Low Temperature;
- Maintenance;
- Recharging;
- Resistors;
- Temperature Effects;
- Electronics and Electrical Engineering