DOI: 10.4231/55tf-bg42
title: Molicel M35A Vent Cap CT Scans

description: &lt;p&gt;&lt;strong&gt;Purpose:&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Computed tomography (CT) scans of a Molicel M35A vent cap assembly were conducted to analyze the geometry and structure of  the vent cap assembly including key safety devices, such as: the current interrupt device (CID) and burst disk.  The data may be used to inspect the vent cap assembly and take measurements of geometric features.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Contents:&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;This dataset includes data for two separate CT scans: intact and vent-activated.  The intact scan includes the top portion of a fresh M35A cell, including the vent cap assembly in the pristine/intact state.  The vent-activated scan includes the vent cap assembly after the current interrupt device (CID) and vent mechanism have been activated.  The preparation of vent-activated samples is described by Li et al. [1].&lt;/p&gt;

&lt;p&gt;This dataset includes four files:&lt;/p&gt;

&lt;ol&gt;
 &lt;li&gt;M35A_intact_tiff_stack.zip - compressed archive of images in .tif format from the intact CT scan.&lt;/li&gt;
 &lt;li&gt;M35A_intact_efX-CT.nsivol - bundled data for the intact CT scan, formatted for use with efX-CT.&lt;/li&gt;
 &lt;li&gt;M35A_vent_activated_tiff_stack.zip - compressed archive of images in .tif format from the vent-activated CT scan.&lt;/li&gt;
 &lt;li&gt;M35A_vent_activated_efX-CT.nsivol - bundled data for the vent-activated CT scan, formatted for use with efX-CT.&lt;/li&gt;
&lt;/ol&gt;

&lt;p&gt;&lt;strong&gt;Method:&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;The following excerpt is from the paper by Li et al. [1]:&lt;/p&gt;

&lt;blockquote&gt;... CT scans were conducted using an X50 industrial X-ray inspection system from North Star Imaging (NSI).  The CT scans had spatial resolution of 16.6&mu;m.  3D renderings of the CT scans were created with a filtered back projection algorithm using efX-CT Software from North Star Imaging.   The 3D rendering dimensions were calibrated by scanning a reference standard with the same scan parameters and were viewed using efX-CT Lite v. 2.0.5.0 software. &lt;/blockquote&gt;

&lt;p&gt;&lt;strong&gt;Quick Start Guide:&lt;/strong&gt;&lt;/p&gt;

&lt;ol&gt;
 &lt;li&gt;Tiff stacks may be downloaded and used with image processing software, such as Dragonfly (&lt;a href="https://theobjects.com/dragonfly/"&gt;https://theobjects.com/dragonfly/&lt;/a&gt;).  Or bundled data is available for use with efX-CT (&lt;a href="https://4nsi.com/product/efx-ct-software/"&gt;https://4nsi.com/product/efx-ct-software/&lt;/a&gt;).&lt;/li&gt;
 &lt;li&gt;For bundled data, first download and launch the efX-CT program. &lt;/li&gt;
 &lt;li&gt;Then, from efX-CT, load the .nsivol file.&lt;/li&gt;
 &lt;li&gt;Use &quot;X&quot;, &quot;Y&quot;, or &quot;Z&quot; keys to change viewing plane&lt;/li&gt;
 &lt;li&gt;Use spacebar to toggle between viewing window and scan data&lt;/li&gt;
 &lt;li&gt;Use mouse left-click and drag to rotate plane&lt;/li&gt;
 &lt;li&gt;Use mouse wheel to move viewing plane through the volume&lt;/li&gt;
 &lt;li&gt;Use the histogram tool to improve contrast and brightness&lt;/li&gt;
 &lt;li&gt;Extract 2D slices to make measurements of length, diameter, angle, etc.&lt;/li&gt;
&lt;/ol&gt;

&lt;p&gt;&lt;strong&gt;References:&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;[1] Li, W., Crompton, K. R., Hacker, C., &amp; Ostanek, J. K. (2020). Comparison of Current Interrupt Device and Vent Design for 18650 Format Lithium-ion Battery Caps. &lt;em&gt;Journal of Energy Storage&lt;/em&gt;, 32, 101890. doi:&lt;a href="https://doi.org/10.1016/j.est.2020.101890" rel="nofollow noopener noreferrer noopener noreferrer" target="_blank"&gt;10.1016/j.est.2020.101890&lt;/a&gt;&lt;/p&gt;
description: This dataset includes computed tomography (CT) scans of the positive terminal assembly from a commercial lithium-ion battery (model: Molicel M35A).