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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 during the time required for the mission, in this case 12 and 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 12 hours and 24 hours flight as well as rising operation. • PWP shall provide the average power of 225W to the Phone Booth • 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/12 and 24hrs

  7. Battery Pack Phone Booth/12hrs 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)=96.42Ah • 3 of 10 Cell Series Saft G62/1.2 =103.5Ah

  8. Battery Pack Mechanical Architecture Phone Booth/12hrs

  9. Battery Pack Phone Booth/24hrs 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 10 Cell Series Saft G62/1.2 =207Ah

  10. Battery Pack Mechanical Architecture Phone Booth/24hrs

  11. Battery Pack Mechanical Architecture Phone Booth/24hrs

  12. Battery Pack Weldering Saft G62/1.2 nickel strips weldering conditions

  13. Saft batteries typical discharge characteristics Saft G62/1.2 typical discharge characteristics

  14. MassEstimation

  15. Battery Box PhoneBooth/12hrs Upperside and Underside Lateral 150.12 mm 170 mm 500.4 mm 500.4 mm 150.12mm 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*150.12mm*3mm*2*0.00269g/mm3 = 1212.43g Front and Back FaceVolume= FBV= 170mm*150.12mm*3mm*2*0.00269g/mm3 = 412g Total Case Mass = LSV + USV + FBV = 1373 + 1212.43+412 = 3kg TOTAL MASS INCLUDING CELLS AND CASE = (30Cells*300g) + (Case Mass = 3kg) = 12kg+20% of margin = 14.4kg Front Face and Back Face 170 mm

  16. Battery Box PhoneBooth/24hrs 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

  17. Battery PWP Location

  18. 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. (TBD)

  19. Battery Cells,Connectors and Cables • Cells • Connectors • Cables Option I: In case of 225W /12hrs powerconsumptionitwillbenecessary 30 cells of Saft G62/1.2 Option II: In case of 225W /24hrs powerconsumptionitwillbenecessary 60 cells 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.

  20. Battery Voltage Regulator , Fuses • Relays (TBD) • Switches (TBD) • Thermal Fuse The thermal Fuse we are going to use is Klixon C Series and MIL-PRF-23419Space Coast IC • Electrical Fuse The thermal Fuse we propose to use is Klixon PN 6752-12-25, Military type MS24571-25

  21. Why using 225W ? Total: 96.4W+20% of security Margin = 103.68W Backup = 80W (183.68)+20% of security Margin = 221W “Thisversionshouldbediscussed”

  22. Battery Pack Budget Phone Booth /225W @12 and 24hrs

  23. THANK YOU!!!

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