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Battery Power Pack (PWP)

EUSO BALLOON. Battery Power Pack (PWP). RIKEN/UAH Héctor Prieto, Katsuhiko Tsuno, Marco Casolino. Mission Objectives with success criteria.

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Battery Power Pack (PWP)

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  1. EUSO BALLOON Battery Power Pack (PWP) RIKEN/UAH Héctor Prieto, Katsuhiko Tsuno, Marco Casolino

  2. Mission Objectives with success criteria Maintain constant power of 225 W for the phone booth and 25 W for the IR Camera during the time required for the mission, in this case 24 hours of flight.Zero levels of overloading the circuit due to problems with the batteryZero levels of overheating in the circuit due to problems with the battery

  3. Battery Pack technical specifications

  4. Battery Pack design description Objectives • PWP shall provide the primary power in 30 hours minimum which includes 24 hours level flight and rising operation. • PWP shall provide the primary power in 10 hours minimum including 2 hour level flight and rising operation. • PWP shall provide the average power of 225W and 25W (TBD) to the instruments. • PWP shall provide enough transient current generated at instrument booting. • PWP shall be protected from the instrument overload by the fuse, circuit breaker or current limiter.

  5. Battery Pack design description Description At the moment we assume a battery system providing 28V; since the highest voltage is 28V (and HV is produced internally). The battery pack will be attached to the gondola and provide power to the LV board and the HK board. Relays (commanded by CNES) will control the power ON/OFF.

  6. Battery Pack connection diagram Phone Booth

  7. Battery Pack connection diagram IR Camera

  8. Battery Pack Phone Booth Component Battery Component Selected: Saft G62/1.2 Specification: Li-SO2/28V/34.5Ah Capacity = (Watts required/Volts required)*(Time Hours) Battery Selection Capacity @ 24hours = (225W/28)*(24h)=192.72Ah • 6of 12 Cell Series Saft G62/1.2 =207Ah

  9. Battery Pack IR Camera Component Battery Component Selected: Saft G62/1.2 Specification: Li-SO2/28V/34.5Ah Capacity = (Watts required/Volts required)*(Time Hours) Battery Selection Capacity @ 24hours = (25W/20)*(24h)= 30 Ah • 1of 10 Cell Series Saft G62/1.2 =34.5Ah

  10. Battery Pack Mechanical Architecture Phone Booth

  11. Battery Pack Mechanical Architecture IR Camera

  12. MassEstimation

  13. Battery Box PhoneBooth Upperside and Underside Lateral 300.24 mm 170 mm 500.4 mm 500.4 mm 300.24 mm MassCalculations Density = Aluminum Box = 2.69g/cm3 = 0.00269g/mm3 Thickness= 3mm Lateral SidesVolume= LSV= 500.4mm*170mm*3mm*2*0.00269g/mm3 = 1373g Upper and UnderSideVolume= USV = 500.4mm*300.24mm*3mm*2*0.00269g/mm3 = 2423g Front and Back FaceVolume= FBV= 170mm*300.24mm*3mm*2*0.00269g/mm3 = 824g Total Case Mass = LSV + USV + FBV = 1373 + 2423 +824 = 4.62kg TOTAL MASS INCLUDING CELLS AND CASE = (60Cells*300g) + (Case Mass = 4.62kg) = 22.62kg+20% of margin = 27.14kg Front Face and Back Face 170 mm

  14. Battery Box IR Camera Upperside and Underside Lateral 100.08 mm 170 mm 250.2 mm 100.08mm 100.08 mm MassCalculations Density = Aluminum Box = 2.69g/cm3 = 0.00269g/mm3 Thickness= 3mm Lateral SidesVolume= LSV=170mm*100.08mm*3mm*2*0.00269g/mm3 = 275g Upper and UnderSideVolume= USV =250.2mm*100.08mm*3mm*2*0.00269g/mm3 = 404.14g Front and Back FaceVolume= FBV= 100.08mm*170mm*3mm*2*0.00269g/mm3 =275g Total Case Mass = LSV + USV + FBV = 275+ 404.14 + 275 = 1kg TOTAL MASS INCLUDING CELLS AND CASE = (10Cells*300g) + (Case Mass = 1kg) = 4kg+20% of margin = 4.8kg Front Face and Back Face 170 mm

  15. Battery Protection and Support • Fire The Battery pack willhavethermal fuse overheating protector whichwillprotect the PWP againstfirerisk • Explosion • The box itselfwillbe a protectionagainstexplosiondueto the batterieswillbeconfinedthere • Breaking Thismechanicalissueshallbediscusedwith the mechanicalengineers in charged of the EUSO-BalloonmechanicalStructure MechanicalSupport ECAL-Rikenwillprovide the mechanicalstructure, whichwillbemade of aluminumtoavoidrisk of explosion and firepropagation.

  16. Battery Cells,Connectors and Cables • Cells • Connectors • Cables Option I: In case of 225W powerconsumptionitwillbenecessary 60 cells of Saft G62/1.2 Option II: In case of 25W powerconsumptionitwillbe necessary12cells of Saft G62/1.2 The Connectors we are going to use are 9 pins D-Sub connectors for all interfaces and subsystems. The Cables we are going to use are THERMAX MIL-DTL-22759/91,92 for all interfaces and subsystems.

  17. Battery Switches, Fuses • Switches • Fuses The Switches we are going to use are APEM-M3500 The Fuses we are going to use are Thermal Fuse Klixon C Series and MIL-PRF-23419Space Coast IC

  18. Why using 25W? • 25W Total Power Budget: 20W +20% of Security Margin = 25W

  19. Why using 225W ? • 225W Total: 89.2W+20% of security Margin = 107.04W Additional Heaters and backup = 70W (180)+20% of security Margin = 216W Thisversionshouldbediscussed

  20. Battery Pack Budget/90W

  21. Battery Pack Budget Phone Booth /225W

  22. THANK YOU!!!

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