Uninterruptible Power Source UPS Status October 2004

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Uninterruptible Power Source (UPS)
StatusOctober 2004

• P. Nemeth/LM

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CSP Functional Block Diagram
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Responsibilities

• Cells, Bricks, and BMS
• Yardney/Lithion R. Gitzendanner
• Battery Casing, Electrical/Mechanical Integration
• CSIST Dr. Ching-Kai Ho
• Battery Charger
• CRISA A. Posada
• Customer/Subcontract Management
• MIT F. Eppling and S. Ting
• Technical Management M. Capell/MIT and G.
  Viertel/ETH
• Subcontract Technical Monitor P. Nemeth/LM

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Cell Dimensions
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Brick Layout
Mass estimate for brick 9kg Total weight budget
for UPS 212.5kg Additional weight savings from
Cutout on side panel Decrease flange width
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Battery Requirements

• Battery will provide control power to CSP in
  event of loss of ISS power or communication
• Watch-dog timer/control circuit
• Normal Ramp down function
• Quench monitoring
• Initiation of quench, 45A pulse
• Minimum battery voltage 20.3V during pulse
• Derived from minimum voltage at quench heaters of
  12V
• Must operate in thermal environment similar to
  USS-02 Upper Trunnion Bridge

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Battery Specifications

• Consists of eight cells, Yardney NCP25-3
• Nominal Voltage 8 X 3.6 V 28.8 V
• Capacity 28 Ah
• Operational Temperature Range -30 degC to 50
  degC
• Capable of supplying 45A pulse at required
  voltage throughout mission profile

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Electronics Envelope
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UPS Interior Geometry
BMS
Batteries
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Revised UPS Mounting
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Latest UPS Mechanical Design (by CSIST)
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Cell/BMS Milestone Schedule

• March 1, 2004 Yardney completes cell
  manufacturing
• June 14, 2004 Yardney completes internal
  Acceptance test
• June 21, 2004 - UPS SOW Rev A released
• Revision required to update testing requirements
  from NASA Safety
• Allows Yardney to proceed with cell acceptance
  and qualification testing
• July 15, 2004- Yardney baselines Electronics
  (BMS) physical layout /CSIST to proceed with
  Battery case design
• August October 2004 Qual and Acceptance Test
  procedures development
• October 27 - Approve procedures/begin tests
• January 16 BMS build and test complete
• March 28, 2005 - BMS and Bricks ship to CSIST

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UPS Milestone Schedule

• PDR for Battery Casing _at_ CSIST December 2003
• Pre-CDR issue closeout telecon October 26 at LM
• CDR for Battery Casing _at_ CSIST December 2004
• EDU required for support of Cryomagnet Avionics
  Box (CAB) functional testing
• Testing scheduled March thru June 2005
• EU Battery Box fabrication complete mid-March,
  2005
• Cell/BMS delivery late March, 2005
• UPS integration and test March - April, 2005
• EU to CRISA in May to support CAB testing (March
  through June 2005) prior to turnover

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UPS Target Schedule

• Baseline BMS footprint July 16, 2004
• Finalize Bracket design August 1, 2004
• UPS CDR at CSIST mid-October, 2004
• EU Battery Box fabrication complete mid-February,
  2005
• Cell/BMS delivery mid-February, 2005
• UPS integration and test February early April,
  2005
• EU to CRISA mid-April to support CAB testing
  (March through June 2005) prior to turnover