現在鋰離子電池首要(yao)(yao)方(fang)(fang)形、圓(yuan)柱、軟包(bao)三(san)大類，其(qi)間(jian)方(fang)(fang)形和圓(yuan)柱的(de)外殼(ke)首要(yao)(yao)選用鋁合金(jin)、不(bu)銹(xiu)鋼等(deng)硬(ying)殼(ke)，而軟包(bao)的(de)外殼(ke)則選用鋁塑膜，這是他們(men)的(de)本質區別(bie)，功能方(fang)(fang)面軟包(bao)的(de)首要(yao)(yao)優勢包(bao)含：
（1）安(an)全功能好：電(dian)解液(ye)(ye)較少漏(lou)液(ye)(ye)，且在發作(zuo)(zuo)安(an)全隱(yin)患的情況下軟包電(dian)池會鼓氣裂開，而不像硬殼電(dian)池那樣內壓過大會發作(zuo)(zuo)爆炸；
（2）分(fen)量輕：軟(ruan)包電池分(fen)量較同等容量的鋼殼方(fang)形電池輕40%，較鋁殼方(fang)形電池輕20%；
（3）電池容量大：軟(ruan)包節約體(ti)積20%，較同等規格尺度的(de)鋼(gang)殼電池容量高50%，較高20～30%；
（4）循環功能(neng)好：軟包電池(chi)的循環壽數更(geng)長，100次(ci)循環衰(shuai)減比(bi)鋁(lv)殼少4%～7%；
（5）內阻小(xiao)(xiao)：軟包電(dian)(dian)池的內阻較(jiao)鋰電(dian)(dian)池小(xiao)(xiao)，國(guo)內最小(xiao)(xiao)可做到35mΩ以下，極大地降低電(dian)(dian)池的自(zi)耗電(dian)(dian)；
（6）設計靈敏：可(ke)根據客戶需(xu)求定制外形，可(ke)以做更薄，普通鋁殼只能做到4mm，軟包可(ke)以做到0.5mm。
三種類(lei)型電(dian)池的功能比較(jiao)：
在功能方面軟包電池(chi)更(geng)具綜(zong)合優勢，未來運用(yong)遠景寬廣：
1）軟包電池更適合便攜式、對空(kong)間(jian)或厚度要(yao)求高(gao)的(de)運用范(fan)疇，例如3C消費類電子產品(pin)；
2）盡管(guan)方(fang)形(xing)電(dian)(dian)(dian)池(chi)的單體容量(liang)高，但又重又大(da)，而(er)(er)軟包電(dian)(dian)(dian)池(chi)在(zai)(zai)能量(liang)密度方(fang)面優勢顯著，而(er)(er)且現在(zai)(zai)單體電(dian)(dian)(dian)芯也在(zai)(zai)往大(da)容量(liang)、高倍率方(fang)向開展，將更符合新能源汽(qi)車等(deng)范疇對移動(dong)電(dian)(dian)(dian)源的要(yao)求；
3）盡(jin)管(guan)圓柱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)生產工藝老(lao)練、能量(liang)密(mi)度(du)優勢(shi)顯著，但由于單體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯的(de)(de)容量(liang)很小，故相同(tong)容量(liang)巨細的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)Pack需要(yao)更多(duo)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯，例如特斯拉ModelS的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)Pack容量(liang)為(wei)85kWh，大約有(you)7000多(duo)顆18650型圓柱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)，這對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)管(guan)理系統BMS要(yao)求非常高，而軟(ruan)包電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)單體容量(liang)可抵上(shang)10個以上(shang)18650型圓柱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)，對BMS的(de)(de)要(yao)求較低，介于國內乃至全球大多(duo)數BMS配套能力有(you)限，大容量(liang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)Pack不會過多(duo)選用(yong)圓柱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)，另外(wai)，圓柱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)因能量(liang)密(mi)度(du)太高導(dao)致安全性較差，且硬殼導(dao)致內壓大，故常發作爆(bao)炸事件，而軟(ruan)包電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)則具(ju)有(you)顯著優勢(shi)。
我國現在主流電動車企在加速軟(ruan)包(bao)(bao)電池的運用。北汽、上(shang)汽等乘用車企紛繁開(kai)端嘗試(shi)運用軟(ruan)包(bao)(bao)電池，其(qi)間萬向A123和孚能科技軟(ruan)包(bao)(bao)電池占據(ju)主流。與此同時，國內(nei)三(san)元(yuan)軟(ruan)包(bao)(bao)技術進步顯著(zhu)，能量(liang)密度大(da)幅提升。軟(ruan)包(bao)(bao)趨勢興起，企業為(wei)搶(qiang)占先機(ji)，加大(da)軟(ruan)包(bao)(bao)擴產(chan)力度。
面對巨大的(de)市場誘惑，國(guo)內企業也紛(fen)繁布局鋰(li)電(dian)(dian)(dian)池(chi)(chi)軟(ruan)包業務。2018年(nian)1－5月份(fen)，我國(guo)動(dong)(dong)力電(dian)(dian)(dian)池(chi)(chi)裝(zhuang)機(ji)量(liang)達(da)12.66Gwh，同比增(zeng)加247.80％。其間軟(ruan)包動(dong)(dong)力電(dian)(dian)(dian)池(chi)(chi)裝(zhuang)機(ji)量(liang)達(da)1.43Gwh，同比增(zeng)加71.98％，市場占比達(da)11％，占比同比去(qu)年(nian)1－5月份(fen)下降(jiang)了12個百分點；首(shou)要原因(yin)是前(qian)五個月寧德年(nian)代和比亞迪裝(zhuang)機(ji)量(liang)增(zeng)速較快(kuai)，增(zeng)大了方形(xing)電(dian)(dian)(dian)池(chi)(chi)的(de)市場份(fen)額，而(er)軟(ruan)包和圓(yuan)柱電(dian)(dian)(dian)池(chi)(chi)則有所下降(jiang)。預(yu)測鋰(li)電(dian)(dian)(dian)池(chi)(chi)需求與軟(ruan)包浸(jin)透率并肩(jian)增(zeng)加，2020年(nian)軟(ruan)包浸(jin)透率41%左(zuo)右,軟(ruan)包電(dian)(dian)(dian)池(chi)(chi)需求將達(da)59GWh，GAGR為35%。
軟包電池(chi)一般有(you)三個封(feng)(feng)(feng)(feng)(feng)(feng)印(yin)邊，靠熱封(feng)(feng)(feng)(feng)(feng)(feng)機(ji)調節適宜的溫度(du)、力(li)度(du)、時(shi)間(jian)等(deng)參數(shu)來保證(zheng)密封(feng)(feng)(feng)(feng)(feng)(feng)效(xiao)果，封(feng)(feng)(feng)(feng)(feng)(feng)印(yin)的質(zhi)量直接影響電池(chi)的安全性、壽數(shu)等(deng)。過封(feng)(feng)(feng)(feng)(feng)(feng)和欠封(feng)(feng)(feng)(feng)(feng)(feng)都容易引起(qi)質(zhi)量不(bu)良(liang)。封(feng)(feng)(feng)(feng)(feng)(feng)印(yin)的厚度(du)是(shi)衡量封(feng)(feng)(feng)(feng)(feng)(feng)印(yin)質(zhi)量的顯著(zhu)指標，對(dui)頂側封(feng)(feng)(feng)(feng)(feng)(feng)工(gong)序進(jin)行厚度(du)監(jian)控是(shi)進(jin)步電池(chi)質(zhi)量和安全性的重(zhong)要手段。
大(da)成(cheng)精(jing)細2D離(li)線(xian)式激光測(ce)厚(hou)(hou)儀(yi)專為鋰離(li)子電池生產(chan)現場供給各種(zhong)各樣(yang)(yang)的(de)測(ce)厚(hou)(hou)解決(jue)方案而設(she)計的(de)機型。能(neng)夠在XY平面內(nei)對(dui)樣(yang)(yang)品(pin)進行高精(jing)度(du)(du)厚(hou)(hou)度(du)(du)丈(zhang)量(liang)。可根(gen)據不(bu)同的(de)丈(zhang)量(liang)需(xu)求(qiu)，更換丈(zhang)量(liang)夾具，完成(cheng)對(dui)既(ji)定樣(yang)(yang)品(pin)進行厚(hou)(hou)度(du)(du)掃描丈(zhang)量(liang)，每個裝置方位(wei)能(neng)丈(zhang)量(liang)一條厚(hou)(hou)度(du)(du)概(gai)括。放置于軟(ruan)包(bao)(bao)電池頂側封(feng)(feng)車(che)間(jian)，用于離(li)線(xian)抽(chou)檢封(feng)(feng)邊厚(hou)(hou)度(du)(du)，直接判別封(feng)(feng)印質量(liang)。軟(ruan)包(bao)(bao)電池封(feng)(feng)印的(de)厚(hou)(hou)度(du)(du)丈(zhang)量(liang)能(neng)夠在此設(she)備(bei)上(shang)輕(qing)易完成(cheng)。
