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Potential use of battery packs from NCAP tested vehicles

Lamb, Joshua H.; Orendorff, Christopher O.

Several large electric vehicle batteries available to the National Highway Traffic Safety Administration are candidates for use in future safety testing programs. The batteries, from vehicles subjected to NCAP crashworthiness testing, are considered potentially damaged due to the nature of testing their associated vehicles have been subjected to. Criteria for safe shipping to Sandia is discussed, as well as condition the batteries must be in to perform testing work. Also discussed are potential tests that could be performed under a variety of conditions. The ultimate value of potential testing performed on these cells will rest on the level of access available to the battery pack, i.e. external access only, access to the on board monitoring system/CAN port or internal electrical access to the battery. Greater access to the battery than external visual and temperature monitoring would likely require input from the battery manufacturer.

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TYPE SAND Report YEAR 2013
DOIOSTI

The role of separators in lithium-ion cell safety

Electrochemical Society Interface

Orendorff, Christopher O.

Christopher J. Orendorff shares his views on the role of separators in lithium-ion cell safety. One of the most critically important cell components to ensure cell safety is the separator, which is a thin porous membrane that physically separates the anode and cathode. The main function of the separator is to prevent physical contact between the anode and cathode, while facilitating ion transport in the cell. The challenge with designing safe battery separators is the trade-off between mechanical robustness and porosity/transport properties. Most commercially available nonaqueous lithium-ion separators designed for small batteries are single layer made of polyoleins. Many of the multilayer separators are designed with a shutdown feature where two of the layers have different phase transition temperatures. The lower melting component melts and fills the pores of the other solid layer and stops ion transport and current low in the cell, as the temperature of a cell increases.

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TYPE Journal Article YEAR 2012
OSTIScopus
Results 51–75 of 91
Results 51–75 of 91