File size: 30,085 Bytes
77d4dbc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<!-- saved from url=http://www.calce.umd.edu/news/index.php -->
<title>CALCE Battery Group - Data</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta content="The Center for Advanced Life Cycle Engineering" name="description">
<meta content="The Center for Advanced Life Cycle Engineering" name="keywords">
<meta content="index" name="robots">
<meta content="Engineering" name="document-classification">
<meta content="Dynamic" name="document-state">
<meta http-equiv="Content-Language" content="EN-US">
<!-- InstanceBeginEditable name="doctitle" --><!-- InstanceEndEditable --><!-- InstanceBeginEditable name="head" --><!-- InstanceEndEditable -->
<script src="scripts/p7tmscripts.js" type="text/javascript"></script>
<link href="scripts/p7tmbasicbut-bm2.css" type="text/css" rel="stylesheet">
<script language="JavaScript1.2" src="scripts/scripts.js"></script>
<link href="scripts/styles-dept.css" type="text/css" rel="stylesheet">
<meta content="MSHTML 6.00.2900.3059" name="GENERATOR">
</head>
<body id="sub" onload="P7_TMclass();P7_TMopen()">
<a name="top"></a>
<table summary="This table is used for visual layout." border="0" cellpadding="0" cellspacing="0" height="96" width="100%">
<tbody>
<tr>
<td align="right" background="images/bg-enme-pixel.png" valign="top"> <img src="images/webtitle.png"></td>
</tr>
</tbody>
</table>
<div id="contentWrap">
<table style="width: 100%;" summary="This table is used for visual layout." border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td rowspan="2" align="left" bgcolor="#730000" valign="top" width="158">
<div id="menu">
<!--This is the navigation menu-->
<table border="0" cellpadding="0" cellspacing="0" width="158">
<tbody>
<tr>
<td background="images/bg.png" bgcolor="#7d1919" valign="top" width="158">
<table class="leftsubnav" border="0" cellpadding="0" cellspacing="0" width="158">
<tbody>
<tr>
<td valign="top">
<table border="0" cellpadding="0" cellspacing="0" width="158">
<tbody>
<tr>
<td bgcolor="#000000"><br>
<div id="p7TMctrl">
<p align="center"><a onclick="P7_TMall(0);return false" href="/#">Expand All</a>
<font color="#669966">|</font>
<a onclick="P7_TMall(1);return false" href="/#">Collapse All</a></p>
</div>
</td>
</tr>
</tbody>
</table>
<div id="p7TMnav">
<div><a href="../index.html" target="_top">Home</a></div>
<div><a onclick="P7_TMenu(this,9)" href="../general/center/calce.htm">About the Center</a>
<div><a href="../general/center/calce.htm">Overview</a></div>
<div><a href="../general/center/Director.htm">Message from the Center Director</a></div>
<div><a href="../general/history.htm">History of CALCE </a></div>
<div><a href="../general/faculty/">Personnel</a></div>
<div><a href="../general/grads/grad_students.html">Alumni</a></div>
<div><a href="../general/industry/involved.htm">How to Get Involved</a></div>
<div><a href="../general/newsletter/news.html">CALCE Newsletter</a></div>
</div>
<DIV><A href="/cgi-bin/entityTools/webmultidbhtmledb.cgi?1997/workshops+events.trp"
target=_top>Upcoming Events</A></DIV>
<div><a href="../accountrequest.html">Request
Web Account</a></div>
<div><a onclick="P7_TMenu(this,9)" href="../consortium.html" >EPS Consortium</a>
<div><a href="../consortium.html">Overview</a></div>
<div><a href="../members/">Members' Area</a></div>
<div><a href="../membership.html">Joining</a></div>
<div><a href="../general/faq.pdf">FAQs</a></div>
<div><a href="../general/membership/members.html">Members</a></div>
<div><a href="../seminars/seminars.htm">Seminars</a></div>
<div><a href="../general/Roadmaps/">Research</a></div>
<div><a href="../general/projects/current.htm">Active Projects</a></div>
<div><a href="../ROI_Calculator/">Return on Investment</a></div>
</div>
<div><a onclick="P7_TMenu(this,9)" href="http://www.prognostics.umd.edu/">PHM Consortium</a>
<div><a href="http://www.prognostics.umd.edu/">PHM Consortium</a></div>
<div><a href="http://www.prognostics.umd.edu/aboutus.htm">About PHM
Consortium</a></div>
<div><a href="http://www.prognostics.umd.edu/howtojoin.htm">How to
Join</a></div>
<div><a href="http://www.prognostics.umd.edu/Registration.htm">Request
Web Account</a></div>
<div><a href="http://www.prognostics.umd.edu/reasearch.htm">Research</a></div>
<div><a href="http://www.prognostics.umd.edu/library.htm">Publications</a></div>
<div><a href="http://www.prognostics.umd.edu/education.htm">Education</a></div>
<div><a href="http://www.prognostics.umd.edu/memberslist.htm">Members</a></div>
<div><a href="http://www.prognostics.umd.edu/faq.htm">FAQ</a></div>
</div>
<div><a href="../general/Facilities/">Test Services and FA</a></div>
<div><a onclick="P7_TMenu(this,9)" href="../general/expertise.htm">Areas of Expertise</a>
<div><a href="../general/expertise.htm" >Areas of Expertise</a></div>
<div><a href="../general/Roadmaps/Risk-Informed/parts_selection.htm">Supply
Chain Management</a></div>
<div><a href="../general/Roadmaps/Failure_Identification/parts.htm">Parts
and Components</a></div>
<div><a href="../general/Roadmaps/Failure_Identification/substrate.htm">Printed
Wiring Boards</a></div>
<div><a href="../general/bga_work.htm">Ball Grid Arrays</a></div>
<div><a href="../general/Roadmaps/Failure_Identification/permanent.htm">Permanent
Interconnects</a></div>
<div><a href="../general/Facilities/photonics.htm">Photonics and
Telecommunications</a></div>
<div><a href="../general/Roadmaps/Failure_Identification/contacts.htm">Contacts
and Connectors</a></div>
<div><a href="../general/Facilities/failure.htm">Failure Analysis</a></div>
<div><a href="../general/Roadmaps/Environmental/stress.htm">Thermal
Management</a></div>
<div><a href="../general/Facilities/environ.htm">Accelerated Testing</a></div>
<div><a href="http://www.enme.umd.edu/ESCML">Electronic
Systems Cost Modeling</a></div>
<div><a href="http://www.enme.umd.edu/EMCPL" target="_blank">Electromagnetic Compatibility</a></div>
</div>
<div><a onclick="P7_TMenu(this,9)" href="../articles/index.html">Publications</a>
<div><a href="../articles/index.html" >Articles</a></div>
<div><a href="../webbooks.htm">Webbooks and Databases</a></div>
<div><a href="../general/published/books/books.html">Books</a></div>
<div><a href="../articles/forum.html">Open Forum</a></div>
</div>
<div><a onclick="P7_TMenu(this,9)" href="../general/education/index.html">Education & Training</a>
<div><a href="../general/education/index.html">Education & Training</a></div>
<div><a href="../general/education/shortcourse.htm">Professional
Development</a></div>
<div><a href="../seminars/seminars.htm">Seminars</a></div>
<div><a href="../general/education/semester.htm">Semester-In-Industry
Program</a></div>
<div><a href="../general/education/textbook.htm">Textbooks and
Multi-Media Materials</a></div>
<div><a href="../general/education/publish.htm">Publications
on Educational Approaches</a></div>
<div><a href="../general/education/grants.htm">Grants
and Awards</a></div>
<div><a href="../general/education/underg.htm">Undergraduate</a></div>
<div><a href="../general/education/graduate.htm">Graduate</a></div>
<div><a href="../general/education/faq.htm">FAQ</a></div>
</div>
<div><a href="../software/">Software</a></div>
<div><a href="../whats_new/awards.html">Awards</a></div>
<div><a href="../general/opportunities/0429.htm">Opportunities</a></div>
<div><a href="../general/directions/directions.html">Visiting CALCE</a></div>
<div><a href="../general/contact.htm">Contact
Us</a></div>
<div><a href="../chinese.htm"><img src="images/chinese.gif" border="no"></a></div>
<div><a href="../japanese.htm"><img src="images/japanese.gif" border="no"></a></div>
<div><a href="../korean.htm"><img src="images/korean.gif" border="no"></a></div>
</div>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<!-- End Navigation--></div>
<table align="center" bgcolor="#000000" border="0" cellpadding="0" width="158">
<tbody>
<tr>
<td bgcolor="#000000" width="10"> </td>
<td align="left" bgcolor="#000000" valign="center"><!-- Begin Google Search box -->
<form action="/cgi-bin/search.cgi" method="get"><br>
<input name="q" type="text"> <input value="Search" valign="middle" type="submit"> </form>
</td>
</tr>
</tbody>
</table>
<p><br>
</p>
</td>
</tr>
<tr>
<td style="background-color: rgb(255, 238, 202); vertical-align: top;"><font size="2"><br>
</font><font ="2"><b></b></font>
<div style="text-align: center;">
<big><big><font ="2"> <b>CALCE Battery Data Archive</b></font></big></big>
</div>
<div style="text-align: center;"><font><b><font size="2"></b><br>
<font><font face="verdana,arial,helvetica">
<a class="nav3" href="../index.html">
<font color="#a82828"><b>Overview</b></font></a>
</font></b></font>
|
<font><font face="verdana,arial,helvetica">
<a class="nav3" href="../facilities.htm">
<font color="#a82828"><b>Facilities</b></font></a>
|
<font><font face="verdana,arial,helvetica">
<a class="nav3" href="../testing.htm">
<font color="#a82828"><b>Testing</b></font></a>
|
<font><font face="verdana,arial,helvetica">
<a class="nav3" href="../bms.htm">
<font color="#a82828"><b>BMS</b></font></a>
|
<font><font face="verdana,arial,helvetica">
<a class="nav3" href="../articles.htm">
<font color="#a82828"><b>Articles</b></font></a>
|
<font><font face="verdana,arial,helvetica">
<!a class="nav3" href="../data.htm">
<font color="#a82828"><b>Data</b></font></a>
|
<font><font face="verdana,arial,helvetica">
<a class="nav3" href="../team.htm">
<font color="#a82828"><b>Team</b></font></a>
</div>
<font size="2"><br>
</font><font ="2"><b><br>
</b></font>
<p>
<ul>
<H3> Battery Data </H3>
<P> Usage of this data for publication purposes should include references to the CALCE battery data base and at least 3
articles referenced by CALCE and/or other contributors to this data collective.
<H2> Data Description </H2>
<P> Small prismatic cells for portable electronic applications </P>
<H4> CS2 Samples </H4>
<ul class="side-nav">
<li>Capacity rating: 1100mAh</li>
<li>Cell Chemistry: LiCoO2 cathode. EDS results also showed trace elements of Manganese</li>
<li>Weight (with safety circuit removed): 21.1g</li>
<li>Dimensions (mm): 5.4 X 33.6 X 50.6</li>
<li>Special Notes: Jellyroll configuration wrapped around the "length" axis, indicated by the red arrows below</li>
</ul>
<center>
<img src="../pics/CS2image.png" />
</center>
<H4> CS2 Tests </H4>
<p> All tests underwent the same charging profile which was a standard constant current/constant voltage protocol with a constant current rate of
0.5C until the voltage reached 4.2V and then 4.2V was sustained until the charging current dropped to below 0.05A. Unless specified, the discharge
cut off voltage for these batteries was 2.7V.</p>
<ul class="side-nav">
<li>CS2_3: Cycled at constant current discharge, Each cycle the discharge current was alternated between 0.11, 0.22, 0.55, 1.1, 1.65, 2.2 Amps
<a href="CS2_3.zip"> CS2_3 data files </a> </li>
<li>CS2_7: Cycled at a constant current discharge of 0.55A. The cut-off voltage was changed at random times to simulate a users uncertain
cut-off voltage behavior <a href="CS2_7.zip"> CS2_7 data files </a></li>
<li>CS2_8: Cycled at constant current of 0.5C <a href="CS2_8.zip"> CS2_8 data files </a></li>
<li>CS2_9: Cycled at constant current discharge, Each cycle the discharge current was alternated between 0.11, 0.22, 0.55, 1.1, 1.65, 2.2 Amps
<a href="CS2_9.zip"> CS2_9 data files </a></li>
<li>CS2_21:Cycled at constant current of 0.5C <a href="CS2_21.zip"> CS2_21 data files </a></li>
<li>CS2_33:Cycled at constant current of 0.5C <a href="CS2_33.zip"> CS2_33 data files </a></li>
<li>CS2_34:Cycled at constant current of 0.5C <a href="CS2_34.zip"> CS2_34 data files </a></li>
<li>CS2_35:Cycled at constant current of 1C <a href="CS2_35.zip"> CS2_35 data files </a></li>
<li>CS2_36:Cycled at constant current of 1C <a href="CS2_36.zip"> CS2_36 data files </a></li>
<li>CS2_37:Cycled at constant current of 1C <a href="CS2_37.zip"> CS2_37 data files </a></li>
<li>CS2_38:Cycled at constant current of 1C <a href="CS2_38.zip"> CS2_38 data files </a></li>
<li>CS2_5: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 3.77V and 2.7V with a 0.55A discharge current in order to cycle the battery in a low regime partial charge/discharge cycle. <a href="CS2_5.zip"> CX2_5 data files </a></li>
<li>CS2_6: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 3.77V and 2.7V with a 0.55A discharge current in order to cycle the battery in a low regime partial charge/discharge cycle. <a href="CS2_6.zip"> CX2_6 data files </a></li>
<li>CS2_24: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 4.2V and 3.77V with a 0.55A discharge current in order to cycle the battery in a high regime partial charge/discharge cycle. <a href="CS2_24.zip"> CX2_24 data files </a></li>
<li>CS2_25: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 4.2V and 3.77V with a 0.55A discharge current in order to cycle the battery in a high regime partial charge/discharge cycle. <a href="CS2_25.zip"> CX2_25 data files </a></li>
</ul>
<H4> CX2 </H4>
<ul class="side-nav">
<li>Capacity rating: 1350mAh</li>
<li>Cell Chemistry: LiCoO2 cathode. EDS results also showed trace elements of Manganese</li>
<li>Weight (with safety circuit removed): 28g</li>
<li>Dimensions (mm): 6.6 X 33.8 X 50</li>
<li>Special Notes: Jellyroll configuration wrapped around the "width" axis </li>
</ul>
<img src="../pics/CX2image.png" />
<H4> CX2 Tests </H4>
<ul class="side-nav">
<li>CX2_3: Discharged at a constant current of 0.5C to a cut-off voltage of 2.7V. After charging the battery was discharged with a pulsed current
alternating between 0.5C, 1C, and 0C each for 30 seconds until the voltage dropped to 3.2V. The profile was repeated over the batteries cycle life
<a href="CX2_3.zip"> CX2_3 data files </a></li>
<li>CX2_4: Discharged at a constant current of 1C to a cut-off voltage of 2.7V. After every 10 charge/discharge cycles the ambient temperature was
raised 10 degs C so that the battery was temperature cycled between 25, 35, 45, 55 degrees Celsius.
<a href="CX2_4.zip"> CX2_4 data files </a></li>
<li>CX2_8: Discharged at a constant current of 3C.<a href="CX2_8.zip"> CX2_8 data files </a></li>
<li>CX2_16: Cycled at a constant current discharge of 0.5C <a href="CX2_16.zip"> CX2_16 data files </a></li>
<li>CX2_31: Cycled at a constant current discharge of 0.5C <a href="CX2_31.zip"> CX2_31 data files </a></li>
<li>CX2_33: Cycled at a constant current discharge of 0.5C <a href="CX2_33.zip"> CX2_33 data files </a></li>
<li>CX2_34: Cycled at a constant current discharge of 1C <a href="CX2_34.zip"> CX2_34 data files </a></li>
<li>CX2_35: Cycled at a constant current discharge of 0.5C <a href="CX2_35.zip"> CX2_35 data files </a></li>
<li>CX2_36: Cycled at a constant current discharge of 1C <a href="CX2_36.zip"> CX2_36 data files </a></li>
<li>CX2_37: Cycled at a constant current discharge of 1C <a href="CX2_37.zip"> CX2_37 data files </a></li>
<li>CX2_38: Cycled at a constant current discharge of 1C <a href="CX2_38.zip"> CX2_38 data files </a></li>
<li>CX2_32: Cycled under a pulsed discharge loading profile. First a discharge of 0.675A was applied followed by a 5 minute rest, and then a 1.35A discharge was applied followed by a 5 minute rest and finally a 2.70A discharge was applied followed by a 5 minute rest. This was repeated until the battery reached its voltage cut-off threshold. <a href="CX2_32.zip"> CX2_32 data files </a></li>
</ul>
<H4> A123 Samples </H4>
<ul class="side-nav">
<li>Capacity rating: 2230mAh</li>
<li>Cell Chemistry: LiFePO2</li>
<li>Weight (with safety circuit removed): 76g</li>
<li>Dimensions (mm): </li>
<ul>
<li>Diameter: 25.4 mm</li>
<li>Length: 65 mm</li>
</ul>
<li>Special Notes: Tab length is not included in the dimensions.</li>
</ul>
<img src="../pics/A123image.png" width=299 height=246 />
<H4> A123 Tests </H4>
<ul class="side-nav">
<li>A123 #3 are tested under simulated driving conditions. The velocity profile is converted to battery current using a electric vehicle model<p>
<a href="A123_3_part1.zip"> A123_3_part1 data files </a><br>
<a href="A123_3_part2.zip"> A123_3_part2 data files </a><br>
<a href="A123_3_part3.zip"> A123_3_part3 data files </a><br>
</li>
<li>A123 #5 are tested under simulated driving conditions. The velocity profile is converted to battery current using a electric vehicle model<p>
<a href="A123_5_part1.zip"> A123_5_part1 data files </a><br>
<a href="A123_5_part2.zip"> A123_5_part2 data files </a><br>
<a href="A123_5_part3.zip"> A123_5_part3 data files </a><br>
<a href="A123_5_part4.zip"> A123_5_part4 data files </a><br>
</li>
<p>
<img src="../pics/a123test3and5.png" width=204 height=151 />
<br>
Test Procedure for A123#3 and A123#5
<p>
<li>A123_094 are tested under simulated driving conditions. The velocity profile is converted to battery current using a electric vehicle model<p>
<a href="A123_094.zip"> A123_094 data files </a><br>
<p>
<img src="../pics/A123test.png" width=204 height=151 />
<br>
Test Procedure for A123_094
</ul>
<H4> K2 Samples </H4>
<ul class="side-nav">
<li>Capacity rating: 2600mAh</li>
<li>Cell Chemistry: LiFePO2</li>
<li>Weight (with safety circuit removed): 80.5g</li>
<li>Dimensions (mm): </li>
<ul>
<li>Diameter: 26.5 mm +-0.2mm</li>
<li>Length: 65.2 mm +-0.4mm</li>
</ul>
<li>Special Notes: Tab length is not included in the dimensions.</li>
<ul>
Nominal Voltage: 3.2<br>
Cycle Life: 2000+<br>
Cylindrical & high powered cells.
</ul>
</ul>
<img src="../pics/K2image.png" />
<H4> K2 Tests </H4>
<ul class="side-nav">
<li>K2_016 as defined in flowchart below. <a href="K2_016.zip"> K2_016 data files </a></li>
<li>K2_039 as defined in flowchart below. <a href="K2_039.zip"> K2_039 data files </a></li>
<p>
<img src="../pics/K2test.png" width=370 height=159/> <br>
Test Profile for K2_016 and K2_039
</ul>
<H3> Data </H3>
<p> SPECIAL NOTES: All files are xlsx format except CX2_4, CX2_31, CS2_8, and CS2_21 which give the data as txt files.
The naming convention for the files uses the first three characters to designate the lot number "CS2" or "CX2" this is followed by
a "_" which is then followed by the sample number and then another "_" The numbers following the second "_" is the date that the file
was downloaded which provides a chronological order of the files.
For the battery CX2_4 which was cycled at different temperatures, thermal couple data is also provided in the Temperature folder. This
data is in the xlsx format.
<p> <br> <br> </p>
<H3> Pouch Cells </H3>
<H4> 1. PL Samples </H4>
<ul class="side-nav">
<li>Capacity rating: 1500mAh</li>
<li>Cell Chemistry: Graphite/LiCoO2</li>
<li>Weight (with safety circuit removed): 30.3gm</li>
<li>Dimensions (mm): 3.4 mm x 84.8 mm x 50.1 mm </li>
</ul>
<img src="images/pl-sample.png" width=299 height=246 />
<H4> Partial SOC Tests </H4>
<p> All tests except the ones with 100% SOC as upper limit of charge underwent the constant current charge-discharge cycle profile. For tests with 100% SOC as upper limit of charge, standard constant current constant voltage (CCCV) profile was applied during charging. However, discharge was carried out using constant current profile. In CCCV profile battery was charged with a constant current rate of 0.5C until the voltage reached 4.2V and then 4.2V was sustained until the charging current dropped to below 0.05A. 2.75 V is considered as the 0% SOC for the tests.
Coulomb counting method has been used to calculate the time durations of charge and discharge to maintain the SOC values within designated SOC ranges.</p>
<ul class="side-nav">
<!--<li>PL 3, 10: Cycled between 0%-60% SOC at C/2 rate (0.75 Amp) <a href="pl/PL_3_10%20(SOC%200%25%20to%2060%25)_halfC.zip"> PL 3,10 data files </a></li>-->
<li>PL 3, 10: Cycled between 0%-60% SOC at C/2 rate (0.75 Amp) <a href="pl/SOC_0-60_HalfC.zip"> PL 3,10 data files </a></li>
<li>PL 4, 5: Cycled between 40%-60% SOC at C/2 rate (0.75 Amp)<a href="pl/SOC_40-60_HalfC.zip"> PL 4,5 data files </a></li>
<li>PL 9, 25: Cycled between 40%-60% SOC at 2C rate (3 Amp) discharge and at C/2 rate (0.75 Amp) charge <a href="pl/SOC_40-60_2C.zip"> PL 9,25 data files </a></li>
<li>PL 11, 13: Cycled between 0%-100% SOC at C/2 rate (0.75 Amp) <a href="pl/SOC_0-100_HalfC.zip"> PL 11,13 data files </a></li>
<li>PL 12, 14: Cycled between 0%-100% SOC at 2C rate (3 Amp) discharge and at C/2 rate (0.75 Amp) charge <a href="pl/SOC_0-100_2C.zip"> PL 12,14 data files </a></li>
<li> PL 17, 18: Cycled between 20%-80% SOC at 2C rate (3 Amp) discharge and at C/2 rate (0.75 Amp) charge <a href="pl/SOC_20-80_2C.zip"> PL 17,18 data files </a></li>
<li>PL 19, 24: Cycled between 40%-100% SOC at C/2 rate (0.75 Amp) <a href="pl/SOC_40-100_HalfC.zip"> PL 19,24 data files </a></li>
<li>PL 21, 23: Cycled between 20%-80% SOC at C/2 rate (0.75 Amp) <a href="pl/SOC_20-80_HalfC.zip"> PL 21,23 data files </a></li>
<!--
<li>CX2_8: Discharged at a constant current of 3C.<a href="cx2_8.zip"> CX2_8 data files </a></li>
<li>CX2_16: Cycled at a constant current discharge of 0.5C <a href="CX2_16.zip"> CX2_16 data files </a></li>
<li>CX2_31: Cycled at a constant current discharge of 0.5C <a href="CX2_31.zip"> CX2_31 data files </a></li>
<li>CX2_33: Cycled at a constant current discharge of 0.5C <a href="CX2_33.zip"> CX2_33 data files </a></li>
<li>CX2_34: Cycled at a constant current discharge of 1C <a href="CX2_34.zip"> CX2_34 data files </a></li>
-->
</ul>
<H4> 2. PLN Samples </H4>
<ul class="side-nav">
<li>Capacity rating: 1500mAh</li>
<li>Cell Chemistry: Graphite/LiCoO2</li>
<li>Weight (with safety circuit removed): 30.3gm</li>
<li>Dimensions (mm): 3.4 mm x 84.8 mm x 50.1 mm </li>
</ul>
<img src="images/pl-sample.png" width=299 height=246 />
<H4> Storage Life Test </H4>
<p> A total of 144 Li-ion cells with three different SOC values (0% SOC, 50% SOC and 100% SOC) underwent battery storage life test under four different temperatures (-40C, -5C, 25C, 50C)</p>
<ul class="side-nav">
<li>12 cells were stored at each of these temperatures: -40C, -5C, 25C and 50C. </li>
<li>Of the12 cells stored at each temperature, 4 cells were stored at 50% SOC, 4 cells at 100% SOC, and 4 cells at 0% SOC. </li>
<li> 48 cells underwent capacity testing and impedance measurement every 3 weeks; 48 cells underwent capacity testing and impedance measurement every 3 months; and 48 cells underwent capacity testing every 6 months. </li>
</ul>
<p>For example: Cell PLN_51 underwent the initial capacity test with CCCV charging at a rate of C/2. Once the current fell below C/100 rate, the cell was discharged at a rate of C/2 to accumulate the deliverable maximum capacity of the cell. Then, the cell was fully charged using the same CCCV profile followed an impedance test. In the next step, the cell was discharged to 50% SOC through calculating the accumulative capacity to half of the maximum capacity. Further, the cell was stored into the temperature chamber for 3 weeks. After 3 weeks, the cell would be taken out for the capacity and impedance tests. </p>
<ul class="side-nav">
<li> Cell Number & Storage SOC & Temperature & Storage Period <a href="pln/PLN_Number_SOC_Temp_StoragePeriod.zip"> PLN_Number_SOC_Temp_StoragePeriod </a></li>
<li>PLN Capacity Initialization <a href="pln/Capacity Characterization_Initialization.zip"> Capacity Characterization_Initialization </a></li>
<li>PLN Impedance Initialization <a href="pln/Impedance Characterization_Initialization.zip"> Impedance Characterization_Initialization </a></li>
<li>PLN Capacity test for batteries stored at -40C <a href="pln/Capacity_-40C.zip"> Capacity_-40C </a></li>
<li>PLN Impedance test for batteries stored at -40C <a href="pln/Impedance_-40C.zip"> Impedance_-40C </a></li>
<li>PLN Capacity test for batteries stored at -5C <a href="pln/Capacity_-5C.zip">Capacity_-5C </a></li>
<li>PLN Impedance test for batteries stored at -5C <a href="pln/Impedance_-5C.zip"> Impedance_-5C </a></li>
<li>PLN Capacity test for batteries stored at room temperature (approx. 25C): <a href="pl/Capacity_25C.zip"> Capacity_25C </a></li>
<li>PLN Impedance test for batteries stored at (approx. 25C) <a href="pln/Impedance_25C.zip"> Impedance_25C </a></li>
<li>PLN Capacity test for batteries stored at 50C <a href="pln/Capacity_50C.zip"> Capacity_50C </a></li>
<li>PLN Impedance test for batteries stored at 50C <a href="pln/Impedance_50C.zip"> Impedance_50C </a></li>
</ul>
<!--
<li>CX2_8: Discharged at a constant current of 3C.<a href="cx2_8.zip"> CX2_8 data files </a></li>
<li>CX2_16: Cycled at a constant current discharge of 0.5C <a href="CX2_16.zip"> CX2_16 data files </a></li>
<li>CX2_31: Cycled at a constant current discharge of 0.5C <a href="CX2_31.zip"> CX2_31 data files </a></li>
<li>CX2_33: Cycled at a constant current discharge of 0.5C <a href="CX2_33.zip"> CX2_33 data files </a></li>
<li>CX2_34: Cycled at a constant current discharge of 1C <a href="CX2_34.zip"> CX2_34 data files </a></li>
-->
</ul>
</ul>
<p>
<br>
<br>
<br>
<br>
</td>
</tr>
</tbody>
</table>
</div>
<!--#include virtual="../includes/footer.html" -->
<table id="footer" border="0" cellpadding="0" cellspacing="0" width="711">
<tbody>
<tr>
<td colspan="2" align="left" height="5" valign="top"><img src="images/shim.gif" height="10" width="1"> </td>
</tr>
<tr>
<td align="left" valign="top" width="159"> </td>
<td align="center" valign="top">
<a href="/general/acronyms.pdf">Acronyms</a> | <a href="/general/sites/sites.html">Related Sites </a> |
<a href="/general/web_disclaimer.htm">Disclaimer</a>
| <a href="/site_map.htm">Site Map</a>
| <a href="http://intranet.calce.umd.edu/">CALCE
Intranet</a> <br>
<img src="images/shim.gif" height="10" width="1"><br>
<strong>Copyright © 2014 by CALCE and the
University of Maryland, All Rights Reserved</strong></td>
</tr>
<tr>
<td align="left" height="5" valign="top"> </td>
<td align="left" height="5" valign="top"> </td>
</tr>
</tbody>
</table>
<!-- InstanceEnd -->
</body>
</html>
|