Shock and Drop Testing of Large Format Lithium Batteries, Draft
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Shock and Drop Testing of Large Format Lithium Batteries, Draft

Filetype[PDF-1.51 MB]


English
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  • Creators:
  • Corporate Creators:
    Naval Surface Warfare Center (U.S.). Carderock Division. Survivability, Structures, and Materials Department
  • Corporate Contributors:
    United States. Dept. of Transportation
  • Subject/TRT Terms:
  • Publication/ Report Number:
    NSWCCD-61-TM
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Corporate Publisher:
    Naval Surface Warfare Center (U.S.). Carderock Division. Survivability, Structures, and Materials Department
  • Abstract:
    Under the sponsorship of US Department of Transportation, the Materials and Power Systems Branch, Code 616, of the Naval Surface Warfare Center Carderock Division was tasked to study the dynamic loads experienced by large format batteries during transportation and evaluate whether the current UN/DOT 38.3 T4 shock test accurately represents transportation mechanical environments. If the study found the current test not to be valid, code 616 was also tasked to propose criteria and methods for conducting shock test on large format batteries. In this study, the effectiveness of the current UN/DOT 38.3 T4 shock test to replicate the dynamic forces experienced by lithium batteries during the course of transportation was investigated. It was determined that the fixed acceleration and pulse duration parameters defined in the test could induce responses in test items that are not representative of abuse conditions during transportation. Next, the transportation mechanical environments were studied through the data that have been compiled from established sources within the NATO countries. These data are summarized the in Allied Environmental Conditions and Test Publications 200 (AECTP 200). The data collected in the AECTP 200 showed that the most severe shocks experienced by packages occur during mishandling scenarios mainly during drop events. Therefore, Procedure IV (Transit Drop) of MIL-STD-810G, Method 516.6 was recommended as a replacement test for the current T4 shock test. The third phase of this study investigated data that had been collected by academia and industry on drop heights recorded for various packages during transportation. The goal was to compare the results with that of MIL-STD-810G. Reviewing these results showed that only a few studies have examined drop heights experienced by packages larger than 25 lbs. Furthermore, these studies indicated that the drop height suggested in MILD-STD-810G for objects less than 100 lb with their largest dimension less than 36” only simulates worst case scenarios. No conclusion can be drawn for other drop heights listed in MIL-STD-810G as very few independent studies have looked at objects heavier than 100lb.
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