1 / 12

UN 38.3 Shock Test Data Collection

UN 38.3 Shock Test Data Collection. Rich Byczek, Intertek Oct 2013. http://www.psessymposium.org/. T4: Shock. Small Cells/Batteries = 150g/6ms = consumer battery specs Large Cells/ Batteries= 50g/11ms = automotive OEM Specs Large Cells -> Small Batteries: Cells at 50G, Battery at 150G.

elwyn
Télécharger la présentation

UN 38.3 Shock Test Data Collection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. UN 38.3 Shock Test Data Collection Rich Byczek, Intertek Oct2013 http://www.psessymposium.org/

  2. T4: Shock • Small Cells/Batteries = 150g/6ms = consumer battery specs • Large Cells/ Batteries= 50g/11ms = automotive OEM Specs • Large Cells -> Small Batteries: Cells at 50G, Battery at 150G

  3. Measurement Methods • Shipping of Representative shipments and packaging. • OEM selected Samples • OEM selected Methods • Small, Medium, Large sample shipments

  4. Measurement Methods • INTERTEK RECOMMENDATIONS • Pallet (LTL) and Small (UPS, FEDEX, etc) • Assume small parcels have the roughest handling. • Measure at package, not at device (do not assume dampening)

  5. Measurement Methods • Measurement Equipment • EDR-3C by IST • 3axis internal accelerometer • Use 2 to test both package and • battery. • - Set minimum G threshold, to collect primarily shock pulse data (i.e. 3G, 5G)

  6. Measurement Methods • May require multiple runs per shipment size and type. • Set realistic thresholds to maximize data collection • Potential variation from shipment to shipment • Variation based on sample and packages size and method.

  7. Measurement Methods • Measurement Analysis • Convert recorded data to time history • Cursory review of peaks and durations • Data “reduction” based on revised threshold • Statistical calculation of Peak G and Duration

  8. Measurement Methods • Resultant Shock Pulse ASSUMPTIONS • Half Sine Pulse • Small/ Large have separate parameters • Peak G level: based on max for each shipment size, regardless of method • Duration: based on average pulse width above threshold • Pulse Count: TBD, based on average pulses per shipment

  9. Measurement Methods • NOTE on PEAK and NUMBER of PULSES: • Increasing number of pulses may be a way to reduce test peak levels. • Typical 1-3 pulse per direction is an ACCELERATED TEST, and therefore peak G level may not be representative of actual accumulated stress. • Alternate is realistic G level, with representative test duration (number of pulses seen in a typical or multiple shipments)

  10. Vibration and Shock • “Test cells and batteries shall be secured to the testing machine by means of a rigid mount” • Fixturing: • Support the product • May simulate packaging • May simulate mounting in position • Not well defined currently. • Cannot assume package dampening

  11. Vibration and Shock • CONSIDER WHAT IS BEING SHIPPED! • CONSIDER HOW IT IS SHIPPED! • CONSIDER HOW IT IS TRANSPORTED AFTER INITIAL SHIPMENT

  12. THANKYOU Rich Byczek Intertek Global Technical Lead Electric Vehicle & Energy Storage 248-219-1099 rich.byczek@intertek.com Mike Wells Vibration Test Department Manager 734-582-2900 Michael.wells@intertek.com

More Related