{"id":157981,"date":"2021-04-29T22:14:07","date_gmt":"2021-04-29T22:14:07","guid":{"rendered":"\/forum\/forums\/topic\/ntgk-parameter-estimation-negative-y-coefficient\/"},"modified":"2021-05-12T16:35:23","modified_gmt":"2021-05-12T16:35:23","slug":"ntgk-parameter-estimation-negative-y-coefficient","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ntgk-parameter-estimation-negative-y-coefficient\/","title":{"rendered":"NTGK parameter estimation negative Y coefficient"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello,<\/p>\n<p>I am trying to model a Cylindrical Lithium ion cell using MSMD battery model (by NTGK empirical model). I have 3 discharging curves for 4 different temperature levels. When I use the parameter estimation tool to input the files, a (warning: Y-value for DOD = &#8230;&#8230;&#8230;. is negative, please check the input data!) comes up (see image). These warnings come up for each temperature. <\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/625\/XVYJSRXBMYRS.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/625\/XVYJSRXBMYRS.png\" alt=\"Screenshot 2021-04-29 151053.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-157981","topic","type-topic","status-closed","hentry","topic-tag-fluent","topic-tag-lithium-ion-1","topic-tag-msmd-battery-model","topic-tag-ntgk-model"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_view_count":["13303"],"_bbp_likes_count":["1","1"],"_bbp_forum_subforum_count":["0"],"_btv_view_count":["1244"],"_bbp_subscription":["235278"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["157981"],"_bbp_forum_id":["27792"],"_bbp_engagement":["125","191434"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["176917"],"_bbp_last_active_id":["176917"],"_bbp_last_active_time":["2021-05-12 16:35:23"]},"test":"nitinchauhan93gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/157981","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/157981\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=157981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}