Mars Rover 2003 Battery Charger Jet Propulsion Laboratory, California Institute of Technology

Format:

Conference/Event

Author/Creator:

Deligiannis, Frank, author.

Conference Name:

34th Intersociety Energy Conversion Engineering Conference (1999-08-02 : Vancouver, Canada)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1999

Summary:

The Jet Propulsion Laboratory Mars Exploration Program Office is currently planning a series of exciting missions to the Red Planet. During each launch opportunity, the missions to Mars will include a Rover mission. During the earlier Rover missions to Mars such as the Mars Pathfinder mission carrying the Sojourner Rover in 1997, the main rover power source was a solar array. The power subsystem of the Sojourner Rover included a solar panel for power during the day, a non-rechargeable lithium battery for power during the night, and a power electronics board for power conditioning and distribution. Starting with the year 2003 the rover missions to Mars will incorporate a rechargeable energy storage device rather than a non-rechargeable power source. Included in the power electronics board, will be a battery controller/charger. The battery controller/charger will be able to monitor and control three parallel 4-cell battery strings. It will also incorporate a cell bypass circuit to ensure that the individual cells within a battery string are at the same state-of-charge. During the design phase of the power subsystem a breadboard version of a one 4-cell string battery charger was fabricated using discrete electronic components on a circuit board. The breadboard was to be used as proof of concept and was not optimized for weight or volume. The breadboard was tested initially using nickel cadmium cells and subsequently using commercial lithium ion rechargeable cells. In this paper a description of the single string charger and the breadboard setup will be presented along with the performance data of the bypass circuit

Notes:

Vendor supplied data

Publisher Number:

1999-01-2447

Access Restriction:

Restricted for use by site license