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1、羅B扌艮告書(shū)tilIT確認(rèn)承認(rèn)張琴2011/10/27////文件編號(hào)扔iT日期2011-10-27作成2011-10-27收信分類(lèi)保密保存期限二年標(biāo)題聚合物電芯鼓氣原因分析報(bào)告一、背景:鼓氣不良數(shù)量占聚合物車(chē)間9刀份報(bào)廢不良品總數(shù)的45.77%,位居笫一。除去8刀份車(chē)間兩次鼓氣異常報(bào)廢365PCS留9月份入庫(kù)報(bào)廢,鼓氣不良比例仍占32.16%。9月份鼓氣不良均比較零散,沒(méi)有批量性的不良發(fā)生。二、目的:找出產(chǎn)生零散鼓氣不良的根本原因,制定相應(yīng)改善措施,降低鼓氣不良率。三、目標(biāo):1、通過(guò)對(duì)比試驗(yàn)分析出鼓氣不良的根木原因。2、降低鼓氣不良率。四、試驗(yàn)方案:1.驗(yàn)證手套箱內(nèi)各因素對(duì)于鼓氣的影
2、響;2.解剖分析鼓氣電池;3.統(tǒng)計(jì)封邊不良造成的鼓氣比例。五、試驗(yàn)數(shù)據(jù)整理分析:1.每日首注lOpcs做好標(biāo)識(shí),記錄注液量,跟進(jìn)電池到分容下夾。數(shù)據(jù)如下表所示:每日首注lOpcs注液量記錄表口期:10.12批次:111928型號(hào):5259115P口期:10.14批次:11J921型號(hào):454093P編號(hào)注液前注液后注液量編號(hào)注液前注液后注液量161.8972.7610.873130.0734.924.85261.9172.7910.883230.1535.004.85361.8672.6710.813330.0934.954.86461.8672.6510.793430.0134.84
3、4.83061.8672.6610.803530.1234.954.83661.8072.6110.813630.1534.984.83761.8172.6010.793730.1635.014.85861.8672.6810.823830.0734.924.85961.9172.7310.823930.0734.924.851061.9372.7110.784030.1334.984.85FJ期:10,15批次:11J921型號(hào):454093P日期:10.16批次:11J922型號(hào):454093P編號(hào)注液前注液后注液量編號(hào)注液前注液后注液量4129.9334.754.825130.2
4、435.044.804229.9034.704.805230.3035.154.854329.8934.734.845329.9734.754.784429.9134.764.855429.9434.754.814529.9234.744.825529.9634.784.824629.9234.784.865629.9634.764.804729.9434.794.855729.9534.784.834829.8934.754.865829.9534.774.824929.9334.774.845929.9234.724.805029.9634.804.846029.9634.804.
5、84H期:10.17批次:11J922型號(hào):454093PH期:10,1811J922型號(hào):454093P編號(hào)注液前注液后注液量編號(hào)注液前注液后注液量6130.0834.924.847129.9634.794.836229.8734.734.867230.0534.894.846329.8834.754.877329.9934.774.786429.9434.784.847429.9534.784.836529.9234.784.867530.1034.934.836629.8834.734.857630.0534.864.816729.9334.774.847729.9234.774
6、.856829.8934.724.837830.0734.904.836930.0334.864.837930.1134.974.867029.9634.824.868030.0634.914.85間斷的跟進(jìn)記錄了6天的首注lOpcs電池,電池正常流轉(zhuǎn)到分容下夾時(shí),未發(fā)現(xiàn)電池有鼓氣現(xiàn)象。1.真空封口機(jī)存在封口時(shí)氣抽不干凈的現(xiàn)象,針對(duì)11T921批次454093P型號(hào)和111928批次5259115P型號(hào)氣未抽T(mén)?凈的電池各lOpcs,正常流轉(zhuǎn)到分容下夾時(shí),未發(fā)現(xiàn)電池有鼓氣現(xiàn)象。2.抽氣封口機(jī)在生產(chǎn)111928批次5259115P型號(hào)時(shí),有電池發(fā)軟的現(xiàn)象,跟進(jìn)lOpcs發(fā)軟電池,發(fā)現(xiàn)電池
7、在經(jīng)過(guò)冷熱壓工序后,鋁膜內(nèi)有氣體,表現(xiàn)為輕微鼓氣。3.統(tǒng)計(jì)每口鼓氣電池,并分析原因,入下表:鼓氣電池不良統(tǒng)計(jì)口期批次型號(hào)鼓氣原因數(shù)最發(fā)現(xiàn)T序分析10.1311T9285259115P過(guò)充3主化成下夾測(cè)試電池電壓,電壓均在4.4V以上,系檢測(cè)柜柜點(diǎn)問(wèn)題10.1611J921454093P側(cè)封不良2主化成下夾側(cè)封不良造成電池吸水,導(dǎo)致鼓氣。吸水/電解液偏少/卷芯松緊度不一致4主化成下夾電池電壓正常,經(jīng)解剖發(fā)現(xiàn)負(fù)極片有輕微掉粉現(xiàn)象,另外,每層負(fù)極片中