TEAMHKPSYSTEMS. 23 March Battery Efficiency in a Low-Temperature, Low-Pressure Environment: Critical Design Review

Transcription

1 23 March 2006 Battery Efficiency in a Low-Temperature, Low-Pressure Environment: Critical Design Review

2 Nathan Team Leader Testing, Structure Design, Editing. Paul Experiment Design, Circuitry, Testing Heather Launch/Recovery, Budget, Experiment Circuitry Kyllie Imaging Systems, Structures, Testing Eric Structures, Structure Design, Hardware, Circuitry Kristina Testing, Writing/ Editing, Structures

3 MissionOverview Comparing Alkaline vs. Nickel Metal Hydride Battery Performance Insulated vs. Non-Insulated Photographs Temperature measurements Expect to find one battery type out-performs the other

4 BatteryTypes Alkaline -Good for everyday use -Low cost -Use for current BalloonSat s Nickel Metal Hydride -Less sensitive to temperature -Low operating temperature Nickel Metal Hydride is one of the most commonly used batteries in space missions.

5 FunctionalBlockDiagram Battery 1 Battery 2 Battery 3 Switch C Battery 1 Battery 2 Battery 3 Timing Circuit Heating Array Temperature Probe Humidity Probe Channel HOBO ELPH Camera Battery Switch H 1 4-Channel HOBO 2 Voltmeter 3 4 Resistor 1 Resistor 2 Resistor 3 Resistor 4 NiMH 1 NiMH 2 (Insulated) Alkaline 1 Alkaline 2 (Insulated) Switch 1 Switch 2 Switch 3 Switch 4

6 HKPSYSTEMS TEAM Exposed Experiment Compartment Hole for Flight cable 4cm Ventilation Slits Heated Compartment 7.5cm Experimental Batteries Timing Circuit Camera Batteries Heating Array (in background) 12cm 13cm Camera 12cm 12cm HOBO A 13cm HOBO B 13cm Separating Wall Heating Array Batteries

7 TentativeSchedule 2/23: Meeting 6pm: Order Materials, Design Prototype: Review for construction 2/25: Begin Construction 3/18: Structure construction completed, stair test and drop test. 3/23: Subsystems test and whip test. 3/25: Experiment construction completed (all construction done), 4/6: Meeting 6pm: Cold Test 4/18: Pre-Launch Inspection 4/21: Final Weigh in, turn into Chris s s Office by 430pm 4/22: Launch Day 5/2: Final Team Presentations

8 MassBudget Component Camera Battery Duracell 9V Battery Heater with Battery Snap Cable 4 Voltage Wires Hobo A Hobo B 2 Battery Snap Cables 6 Switches Camera System (timing circuit and batteries) Temperature Probe Foam Core: Outer Box Structure Foam Core: Separating Wall Foam Core: Inner Matrix Rope Fastening Complex Total Mass: mass (g)

9 FinancialBudget Projected Budget Current Expenses Component Projected Cost Date Item Cost HOBO A $0, Supplied 2/24/2006 Foam Core HOBO B $0, Supplied 2/25/2006 Film 9.72 Camera Heating Array 9V Batteries Foam Core 4 Voltmeters Circuit Board Dry Ice Extra Batteries Others Film Costs Total Projected Cost $0, Supplied $0, Supplied $0, Supplied $15 $0, Supplied $5 $1 per pound $50 $40 $50 $160 2/25/2006 3/7/2006 3/7/2006 3/16/2006 3/22/2006 Current Total Total Remaining 3 batteries (pk49 alkaline 9v), (pk2gp23 battery) PC Board and Battery Holder experiment batteries resistors tubing and washers

10 TestPlan Freefall Dropped mass-simulated simulated structure from the top floor of the DLC to see how it withstand the impact upon landing Structure passed test Stair Test Structure was thrown repeatedly and tumbled down two flights of stairs in the DLC. Structure passed test

11 TestPlan Whip Test Attach seven foot string through the center of the structure and then violently whip it around to assure that the structure will remain intact when facing such conditions Cold Test Perform the entire mission in dry ice to simulate the climate of the high altitude. Also to make sure the heating array is properly functioning and the circuitry stays warm enough to function.

12 TestPlan Battery Endurance Test Tests the resistors in the circuit to ensure that the batteries will be properly drained during flight. Circuitry and Battery Compatibility To make sure that the circuit is properly connected to the batteries, voltmeters and HOBO s s before flight.

13 TestPlan Heating Array Functioning Run the heating array on batteries to assure that it is heating properly Measure the temperature achieved Camera and Timing Circuitry Test Run the camera for the expected period of the ascent while moving the camera in different positions to test picture quality and to assure that the timing is set correctly HOBO Data Collection and Memory Capacity Obtaining a ground reading of the voltmeters and two temperature probes Assuring that the HOBOs have the memory needed to store all data collected

14 ExpectedResults Several clear pictures of the earth s s horizon Use HOBO probes to obtain the outside and inside temperature Experiment Analysis: Compare durability Nickel metal hydride batteries last longer than alkaline batteries es Graphed Data: Each Battery s s voltage vs. time vs. outside temperature vs. approximate altitude Possible graphed results Time (s) Temp ( C) Voltage N (V) Voltage A (V) Approximate Altitude (m)

15 QuestionsAnyone? Thank you! HKPSYSTEMS TEAM