Presentation on theme: "UN 38.3 Shock Test Data Collection Rich Byczek, Intertek Oct 2013 1"— Presentation transcript:
www.intertek.com1 UN 38.3 Shock Test Data Collection Rich Byczek, Intertek Oct 2013 1 http://www.psessymposium.org/
www.intertek.com2 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
www.intertek.com3 Measurement Methods Shipping of Representative shipments and packaging. OEM selected Samples OEM selected Methods Small, Medium, Large sample shipments
www.intertek.com4 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)
www.intertek.com5 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)
www.intertek.com6 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.
www.intertek.com7 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
www.intertek.com8 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
www.intertek.com9 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)
www.intertek.com10 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
www.intertek.com11 Vibration and Shock CONSIDER WHAT IS BEING SHIPPED! CONSIDER HOW IT IS SHIPPED! CONSIDER HOW IT IS TRANSPORTED AFTER INITIAL SHIPMENT
www.intertek.com12 THANKYOU Mike Wells Vibration Test Department Manager 734-582-2900 Michael.firstname.lastname@example.org Rich Byczek Intertek Global Technical Lead Electric Vehicle & Energy Storage 248-219-1099 email@example.com Rich Byczek Intertek Global Technical Lead Electric Vehicle & Energy Storage 248-219-1099 firstname.lastname@example.org
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