SATPC0033433 Tab 04 4 SOW.pdf
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- Solicitation number
- 80NSSC24852682Q
About this file
This statement of work outlines requirements for screening 6600 lithium-ion cells to identify outliers. NASA will provide the cells and requires the contractor to perform open circuit voltage measurement, self-discharge testing, closed circuit voltage measurement, visual inspection, dimensional analysis, impedance testing, capacity cycling with resistance measurement, and statistical analysis. The contractor must submit a test plan and comply with specification EP-WI-037B. All test equipment must be calibrated to NIST standards. The contractor will report the screening results within 8 weeks and return the cells at 10% state of charge. This supports the related federal contract opportunity in which NASA seeks follow-up screening of the 6600 cells to identify discrepancies according to the requirements in the statement of work.
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Text version
SOW for Screening of 18650 Cells
9/29/2023
1.0 Objective – To perform the screening of 6600 cells (18650) to identify outlying or discrepant cells from passing cells.
2.0 Scope – Contractor will be provided with 6600 LG M36 cells that were previously screened by EA when the cells were under 1 year old. The contractor shall Identify cells, read their data matrix code, measure Open Circuit Voltage, perform Self-Discharge, Closed Circuit Voltage, Sleeve Removal, Visual Inspection, Mass, Dimensional, Temporary Re-Sleeving, AC Impedance, and Capacity Cycling with DC Resistance. In addition, a compilation of the uniformity statistics is in scope and prescribed in EP-WI-037B.
3.0 NASA Inputs – NASA will ship 6600 LG M36 cells that were previous screened (hand written S/N, OCV not after 1 year old, and no self-discharge)
4.0 Contractor Tasks
4.1 Plan - The contractor shall submit test plan outline with their proposal specifying the order of the tests and a compliance matrix against the precision & accuracy requirements (sec 4.0 of EP-WI-037A). Proposed deviations from this SOW and EP-WI-037B must be defended with rationale for why it will provide results as good or better than if fully compliant with the specifications herein.
4.2 Screening - The contractor shall perform the cell screening per EP-WI-037B. Only test equipment having current calibrations traceable to NIST shall be utilized for reported measurements. Tests 3.2-3.5 and 3.11 shall be performed at the “as-received” state of charge.
5.0 Reporting – An electronic report of the data and with statistics per EP-WI-037B section 3.13 is required within 8 weeks after receipt of the 6600 cells and contractual authorization to proceed.
The spreadsheet shall also include unique conditions used for each test.
6.0 Hardware Disposition – The contractor shall return all cells at 10% SOC and provide them to a hazardous materials shipper after NASA approval of the data provided in 5.0. Failing cells shall be individually marked in the return shipment. All cells should be sealed in an air tight manner with appropriate desiccant to absorb excess humidity and prevent potential corrosion.
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