1. - Battery Pack Technical Specifications - Battery Pack Design Descriptions - Battery Pack Connection Diagram - Battery Pack Architecture EUSO-BALLOON DESIGN REVIEW, 18.12.2012, CNES TOULOUSE Héctor Prieto RIKEN/UAH EUSO Balloon PWP

2. Battery Pack Technical Specifications CDR – 18.12.2012PWP Technical Specifications2 Phone Booth 24hPhone Booth 12h Altitude40km Pressure3mBar Power225W/192.72Ah, 28V225W/96.42Ah, 28V Operation Duty 24h12h Operating Temperature Range within -40˚C/+70˚C Size(500.4x300.24x170)mm (225W)(500.4x150.12x170)mm (225W) Mass27.14kg14kg

3. CDR – 18.12.2012Design Description3 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.

4. CDR – 18.12.2012 PWP Connection Diagram 4 Battery Pack Design Description/ Connection diagram next two slides : example

5. CDR – 18.12.2012 PWP Architecture for 12 hours 5 Battery Pack Design Architecture 12 Hours 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

6. CDR – 18.12.2012 PWP Architecture for 24 hours 6 Battery Pack Architecture For 24 Hours 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

7. - Objectives for EUSO BALLOON PWP - Location - Elements - Current Status and future Plans EUSO-BALLOON DESIGN REVIEW, 18.12.2012, CNES TOULOUSE Héctor Prieto RIKEN/UAH Instrument and Objectives

8. Objectives for EUSO BALLOON PWP CDR – 18.12.2012 Instrument and Objectives 8 Maintain constant power of 225 W for the phone booth during the time required for the mission, in this case of 12 or 24 hours of flight. Zero levels of overloading the circuit due to problems with the battery Zero levels of overheating in the circuit due to problems with the battery

9. EUSO BALLOON PWP Location CDR – 18.12.2012 EUSO Balloon PWP Location 9

10. EUSO BALLOON PWP Elements CDR – 18.12.2012 EUSO Balloon PWP Elements 10 Cells Option I: In case of 225W /12hrs power consumption it will be necessary 30 cells of Saft G62/1.2 Option II: In case of 225W /24hrs power consumption it will be necessary 60 cells of Saft G62/1.2 Connectors The Connectors we are going to use are 9 pins D-Sub connectors for all interfaces and subsystems. Cables The Cable most suitable for this project is THERMAX MIL-DTL-22759/91,92 for all interfaces and subsystems.

11. EUSO BALLOON PWP Elements CDR – 18.12.2012 EUSO Balloon PWP Elements 11 Switches The Switches we are planning to use are APEM-M3500 Fuses The Fuses we are going to use are Thermal Fuse Klixon C Series and MIL-PRF-23419 Space Coast IC

12. Current Status and Future Plan CDR – 18.12.2012 Current Status and Future Plan 12 Current Status: Electrical Design Frozen, Elements selection started Future Plan: Elements selection frozen, Electrical tests and first model.