本發(fa)明涉及(ji)二次(ci)電池以及(ji)二次(ci)電池集合體。

背景技術：

近年來伴隨電動汽車的普及，開發了使用非水電解(jie)液的大容量(liang)/高(gao)輸出(chu)的二次電池(chi)(chi)，使用二次電池(chi)(chi)時(shi)，串聯(lian)或者并(bing)聯(lian)聯(lian)結多(duo)個二次電池(chi)(chi)作為高(gao)輸出(chu)的二次電池(chi)(chi)集合體來利(li)用。

現有技術文獻

專利文獻

專利文獻(xian)1：jp特開2011-54561號公報

技術實現要素：

若(ruo)由于(yu)過充電(dian)(dian)等而在二次電(dian)(dian)池(chi)(chi)的(de)(de)內部產生過度的(de)(de)熱或者電(dian)(dian)解(jie)液分解(jie)而內部壓力上(shang)升，則(ze)有可能(neng)損害電(dian)(dian)池(chi)(chi)的(de)(de)安(an)全(quan)性。

作(zuo)為(wei)解決這種(zhong)課題的方(fang)法，例如在專利文獻1中提出了具備(bei)如下機(ji)構(gou)的二次電(dian)池(chi)的構(gou)造，該機(ji)構(gou)在電(dian)池(chi)內部的壓力成為(wei)規定值以(yi)上時動作(zuo)，引(yin)起正(zheng)負極(ji)的短路。

本發明的主要目的在于(yu)提供一種可靠性(xing)更高(gao)的二次(ci)電池以及使用了該二次(ci)電池的二次(ci)電池集(ji)合(he)體(ti)。

本發明的(de)(de)(de)一方(fang)式(shi)的(de)(de)(de)二次電(dian)(dian)(dian)(dian)(dian)(dian)池具備：電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)體(ti)(ti)，其(qi)(qi)包括第(di)(di)(di)1電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)以及第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)；外封(feng)(feng)裝(zhuang)體(ti)(ti)，其(qi)(qi)具有開口(kou)，并收納所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)體(ti)(ti)；封(feng)(feng)口(kou)板(ban)，其(qi)(qi)由導電(dian)(dian)(dian)(dian)(dian)(dian)性(xing)(xing)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)構(gou)(gou)(gou)(gou)成，對所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)開口(kou)進(jin)行封(feng)(feng)口(kou)；可變(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)，其(qi)(qi)在(zai)(zai)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)外封(feng)(feng)裝(zhuang)體(ti)(ti)內的(de)(de)(de)壓(ya)力成為規定值(zhi)以上時發生變(bian)形；和導電(dian)(dian)(dian)(dian)(dian)(dian)性(xing)(xing)的(de)(de)(de)第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)，其(qi)(qi)與(yu)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)連(lian)接(jie)(jie)，所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)封(feng)(feng)口(kou)板(ban)具有第(di)(di)(di)1貫通(tong)(tong)孔(kong)，所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)可變(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)對所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)1貫通(tong)(tong)孔(kong)進(jin)行密閉，所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)配(pei)置在(zai)(zai)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)可變(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)的(de)(de)(de)外側(ce)，在(zai)(zai)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)與(yu)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)可變(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)之間(jian)配(pei)置導電(dian)(dian)(dian)(dian)(dian)(dian)性(xing)(xing)的(de)(de)(de)通(tong)(tong)電(dian)(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)，所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)通(tong)(tong)電(dian)(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)的(de)(de)(de)外徑(jing)大于所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)1貫通(tong)(tong)孔(kong)的(de)(de)(de)內徑(jing)，在(zai)(zai)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)外封(feng)(feng)裝(zhuang)體(ti)(ti)內的(de)(de)(de)壓(ya)力成為所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)規定值(zhi)以上時，通(tong)(tong)過所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)可變(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)變(bian)形，從而使所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)通(tong)(tong)電(dian)(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)與(yu)所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)接(jie)(jie)觸，使所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)1電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)和所(suo)(suo)(suo)(suo)(suo)(suo)(suo)述(shu)(shu)(shu)(shu)第(di)(di)(di)2電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)連(lian)接(jie)(jie)。

若具有這種結構，則由(you)于二(er)(er)次(ci)電(dian)池具備伴隨電(dian)池內壓的(de)上升而動作的(de)短路機構，所以即使二(er)(er)次(ci)電(dian)池變(bian)為過充電(dian)等狀態也成為可靠(kao)性較高的(de)二(er)(er)次(ci)電(dian)池。

優選為所述(shu)可變構件由導電性(xing)構件構成，與(yu)所述(shu)封口(kou)板電連(lian)(lian)接，所述(shu)封口(kou)板與(yu)所述(shu)第1電極(ji)電連(lian)(lian)接。

優選(xuan)為(wei)所述封口板(ban)在外面側具(ju)有第(di)1凹(ao)部(bu)(bu)，所述第(di)1貫(guan)通孔位于(yu)所述第(di)1凹(ao)部(bu)(bu)內，所述通電構件配置于(yu)所述第(di)1凹(ao)部(bu)(bu)。

優選為(wei)所(suo)述(shu)(shu)封口板在內(nei)面側具有第(di)2凹部(bu)，所(suo)述(shu)(shu)第(di)1貫通孔位于(yu)所(suo)述(shu)(shu)第(di)2凹部(bu)內(nei)，所(suo)述(shu)(shu)可變構件配置于(yu)所(suo)述(shu)(shu)第(di)2凹部(bu)，所(suo)述(shu)(shu)可變構件的周(zhou)緣與所(suo)述(shu)(shu)封口板進行焊接連(lian)接。

優選為在所述第2電(dian)極連接構(gou)件(jian)與所述通電(dian)構(gou)件(jian)之間配置(zhi)了電(dian)絕緣性(xing)的彈(dan)性(xing)構(gou)件(jian)。

優選為所述(shu)(shu)可變構件在發生了變形時，按(an)壓所述(shu)(shu)通電構件中與所述(shu)(shu)彈性構件對(dui)置的(de)區域(yu)。

優選為在(zai)所(suo)(suo)述(shu)(shu)第(di)2電(dian)極(ji)連接(jie)構件與所(suo)(suo)述(shu)(shu)通電(dian)構件之間配置絕緣構件，所(suo)(suo)述(shu)(shu)絕緣構件具有第(di)2貫通孔，所(suo)(suo)述(shu)(shu)通電(dian)構件具有朝向所(suo)(suo)述(shu)(shu)第(di)2電(dian)極(ji)連接(jie)構件向所(suo)(suo)述(shu)(shu)第(di)2貫通孔內(nei)突出(chu)的突出(chu)部。

優選為(wei)所述可變(bian)構件中的(de)發生(sheng)了變(bian)形(xing)時與(yu)所述通(tong)電構件接觸的(de)部(bu)分(fen)的(de)厚(hou)度(du)，小于(yu)所述通(tong)電構件中的(de)與(yu)所述可變(bian)構件接觸的(de)部(bu)分(fen)的(de)厚(hou)度(du)。

優選(xuan)為在(zai)(zai)(zai)所(suo)述(shu)(shu)(shu)第2電(dian)(dian)極電(dian)(dian)連接集(ji)(ji)電(dian)(dian)體(ti)(ti)，所(suo)述(shu)(shu)(shu)集(ji)(ji)電(dian)(dian)體(ti)(ti)配(pei)置(zhi)于在(zai)(zai)(zai)所(suo)述(shu)(shu)(shu)外封裝體(ti)(ti)內且與(yu)所(suo)述(shu)(shu)(shu)可變(bian)構件對(dui)置(zhi)的位置(zhi)，在(zai)(zai)(zai)所(suo)述(shu)(shu)(shu)集(ji)(ji)電(dian)(dian)體(ti)(ti)中(zhong)，在(zai)(zai)(zai)與(yu)所(suo)述(shu)(shu)(shu)可變(bian)構件對(dui)置(zhi)的區(qu)域形成了第3貫通孔。

優選為在所(suo)(suo)述(shu)集電(dian)體與所(suo)(suo)述(shu)可變構(gou)(gou)件之間存在電(dian)池內部絕緣構(gou)(gou)件，在所(suo)(suo)述(shu)電(dian)池內部絕緣構(gou)(gou)件形(xing)成(cheng)第(di)4貫通孔，所(suo)(suo)述(shu)第(di)3貫通孔和所(suo)(suo)述(shu)第(di)4貫通孔重(zhong)疊配(pei)置。

優選為在(zai)所述可變構件(jian)(jian)變形(xing)前的狀(zhuang)態下，所述可變構件(jian)(jian)和(he)所述通電構件(jian)(jian)不接觸。

所(suo)述可變構件與所(suo)述封(feng)口板一體(ti)地形成(cheng)。

本發(fa)明的(de)二次(ci)電池(chi)集合體具備多個前(qian)述的(de)二次(ci)電池(chi)。

發明效果

根(gen)據本(ben)發明(ming)，能(neng)夠提供一種可靠(kao)性高的二(er)次電池以及使(shi)用了(le)該(gai)二(er)次電池的二(er)次電池集合體。

附圖說明

圖1(a)是實施方(fang)式所(suo)涉及的二次(ci)電池(chi)的示(shi)(shi)意性(xing)(xing)俯視圖，(b)是去(qu)掉了(le)外封裝體的正(zheng)面部(bu)分而示(shi)(shi)出了(le)內部(bu)的示(shi)(shi)意性(xing)(xing)主視圖。

圖(tu)2是負極端子附近的封口板(ban)的示意(yi)性剖視圖(tu)。

圖3是設(she)置在封(feng)口板的(de)第1貫通孔(kong)附(fu)近的(de)示意性放大剖視圖。

圖(tu)4是變形例所涉及的(de)封(feng)口板的(de)示意性剖(pou)視圖(tu)。

圖5是其他實施方式所涉及的負極(ji)端子附近的封口(kou)板(ban)的示(shi)意(yi)性剖視(shi)圖。

圖6是其他實施方式所涉及(ji)的電池組(zu)的示意性立體圖。

符號說明

1二次電池

10電極體

14a負極集(ji)電體的基部

18第2電極連接構件(jian)

19絕緣構件

20外封裝體

21封口板

24a第1凹部

24b第2凹部

25第1貫通孔

27第2貫通孔

28第3貫通孔

29第4貫通孔

40、47可變構件

45通電構件

46突出部

50電池組(zu)(二次電池集合體)

54電池內部絕緣構件

55彈性構件

具體實施方式

以下(xia)，基于附圖來詳細說(shuo)明本(ben)發明的實(shi)施方(fang)式(shi)。以下(xia)的優(you)選(xuan)實(shi)施方(fang)式(shi)的說(shuo)明，本(ben)質上(shang)只不(bu)過是例(li)示，本(ben)發明并不(bu)意(yi)在限制其(qi)應(ying)用(yong)(yong)范圍或者其(qi)用(yong)(yong)途。

在(zai)本申請(qing)中，上(shang)下(xia)方向，以(yi)配置(zhi)二(er)次(ci)電(dian)池(chi)使得外(wai)封裝(zhuang)體(原文：外(wai)裝(zhuang)體)20的(de)(de)開口(kou)位于上(shang)方的(de)(de)情況(kuang)(kuang)為(wei)(wei)基(ji)準(zhun)來進行(xing)定(ding)義(yi)。因此，無論在(zai)將二(er)次(ci)電(dian)池(chi)配置(zhi)為(wei)(wei)怎(zen)樣的(de)(de)朝向的(de)(de)情況(kuang)(kuang)下(xia)，本申請(qing)中的(de)(de)各部件的(de)(de)位置(zhi)關系的(de)(de)限定(ding)，都以(yi)將外(wai)封裝(zhuang)體20的(de)(de)開口(kou)配置(zhi)在(zai)上(shang)方的(de)(de)情況(kuang)(kuang)為(wei)(wei)基(ji)準(zhun)來考慮。

(實施方式1)

圖(tu)(tu)1(a)、(b)是(shi)示意性表示本發(fa)明的(de)(de)一實施方式中的(de)(de)二(er)次電池的(de)(de)構(gou)成的(de)(de)圖(tu)(tu)，圖(tu)(tu)1(a)是(shi)俯視(shi)(shi)圖(tu)(tu)，圖(tu)(tu)1(b)是(shi)去掉外封裝體的(de)(de)正面(mian)部(bu)分而(er)示出了內部(bu)的(de)(de)示意性主視(shi)(shi)圖(tu)(tu)。

如(ru)圖1(a)、(b)所示，在(zai)(zai)(zai)本實(shi)施方式中(zhong)的(de)(de)(de)二次電(dian)(dian)池1中(zhong)，作(zuo)為(wei)發電(dian)(dian)要(yao)素的(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)(ji)(ji)體(ti)(ti)10與電(dian)(dian)解液一起收納在(zai)(zai)(zai)外(wai)封裝(zhuang)體(ti)(ti)20中(zhong)。外(wai)封裝(zhuang)體(ti)(ti)20是(shi)一面(在(zai)(zai)(zai)圖1中(zhong)是(shi)上表面)開(kai)口的(de)(de)(de)長方體(ti)(ti)形狀的(de)(de)(de)殼(ke)體(ti)(ti)。而(er)且，外(wai)封裝(zhuang)體(ti)(ti)20的(de)(de)(de)開(kai)口部(bu)通過由導電(dian)(dian)性(xing)構件(jian)構成(cheng)(cheng)的(de)(de)(de)封口板(ban)(ban)21而(er)被封口。這里，電(dian)(dian)極(ji)(ji)(ji)(ji)(ji)體(ti)(ti)10形成(cheng)(cheng)如(ru)下構造：構成(cheng)(cheng)第(di)1電(dian)(dian)極(ji)(ji)(ji)(ji)(ji)即正(zheng)(zheng)(zheng)極(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)正(zheng)(zheng)(zheng)極(ji)(ji)(ji)(ji)(ji)板(ban)(ban)和構成(cheng)(cheng)第(di)2電(dian)(dian)極(ji)(ji)(ji)(ji)(ji)即負(fu)(fu)極(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)負(fu)(fu)極(ji)(ji)(ji)(ji)(ji)板(ban)(ban)隔著隔板(ban)(ban)(均未圖示)進(jin)行卷繞或者層疊。作(zuo)為(wei)正(zheng)(zheng)(zheng)極(ji)(ji)(ji)(ji)(ji)板(ban)(ban)，可以使用(yong)在(zai)(zai)(zai)金屬(shu)制的(de)(de)(de)正(zheng)(zheng)(zheng)極(ji)(ji)(ji)(ji)(ji)芯體(ti)(ti)表面設(she)置了包含正(zheng)(zheng)(zheng)極(ji)(ji)(ji)(ji)(ji)活性(xing)物(wu)質(zhi)(zhi)的(de)(de)(de)正(zheng)(zheng)(zheng)極(ji)(ji)(ji)(ji)(ji)活性(xing)物(wu)質(zhi)(zhi)層的(de)(de)(de)部(bu)件(jian)。作(zuo)為(wei)負(fu)(fu)極(ji)(ji)(ji)(ji)(ji)板(ban)(ban)，可以使用(yong)在(zai)(zai)(zai)金屬(shu)制的(de)(de)(de)負(fu)(fu)極(ji)(ji)(ji)(ji)(ji)芯體(ti)(ti)表面設(she)置了包含負(fu)(fu)極(ji)(ji)(ji)(ji)(ji)活性(xing)物(wu)質(zhi)(zhi)的(de)(de)(de)負(fu)(fu)極(ji)(ji)(ji)(ji)(ji)活性(xing)物(wu)質(zhi)(zhi)層的(de)(de)(de)部(bu)件(jian)。

正(zheng)(zheng)極(ji)(ji)板(ban)以(yi)及(ji)(ji)負極(ji)(ji)板(ban)分別(bie)在(zai)其一側部(bu)具有未形成活性物質層的(de)正(zheng)(zheng)極(ji)(ji)芯(xin)體(ti)露(lu)出(chu)部(bu)11以(yi)及(ji)(ji)負極(ji)(ji)芯(xin)體(ti)露(lu)出(chu)部(bu)12。而且，正(zheng)(zheng)極(ji)(ji)板(ban)以(yi)及(ji)(ji)負極(ji)(ji)板(ban)配置為正(zheng)(zheng)極(ji)(ji)芯(xin)體(ti)露(lu)出(chu)部(bu)11以(yi)及(ji)(ji)負極(ji)(ji)芯(xin)體(ti)露(lu)出(chu)部(bu)12分別(bie)在(zai)相反方向上伸出(chu)。正(zheng)(zheng)極(ji)(ji)芯(xin)體(ti)露(lu)出(chu)部(bu)11經(jing)由正(zheng)(zheng)極(ji)(ji)集電(dian)體(ti)13與正(zheng)(zheng)極(ji)(ji)端子(zi)15電(dian)連(lian)接，此外，負極(ji)(ji)芯(xin)體(ti)露(lu)出(chu)部(bu)12經(jing)由負極(ji)(ji)集電(dian)體(ti)14與負極(ji)(ji)端子(zi)16電(dian)連(lian)接。

正(zheng)(zheng)極(ji)(ji)(ji)端(duan)(duan)子15以及負(fu)極(ji)(ji)(ji)端(duan)(duan)子16分別(bie)穿過設置(zhi)在(zai)(zai)封(feng)口(kou)板(ban)(ban)21上的(de)貫通孔經由絕(jue)緣構件固定(ding)在(zai)(zai)封(feng)口(kou)板(ban)(ban)21。進而，在(zai)(zai)封(feng)口(kou)板(ban)(ban)21的(de)外(wai)(wai)部側，在(zai)(zai)正(zheng)(zheng)極(ji)(ji)(ji)端(duan)(duan)子15以及負(fu)極(ji)(ji)(ji)端(duan)(duan)子16分別(bie)電(dian)連(lian)接了正(zheng)(zheng)極(ji)(ji)(ji)連(lian)接構件17以及負(fu)極(ji)(ji)(ji)連(lian)接構件(第2電(dian)極(ji)(ji)(ji)連(lian)接構件)18。另(ling)外(wai)(wai)，正(zheng)(zheng)極(ji)(ji)(ji)連(lian)接構件17與(yu)正(zheng)(zheng)極(ji)(ji)(ji)端(duan)(duan)子15電(dian)連(lian)接，并且(qie)也(ye)與(yu)封(feng)口(kou)板(ban)(ban)21電(dian)連(lian)接。另(ling)外(wai)(wai)，也(ye)可以使正(zheng)(zheng)極(ji)(ji)(ji)端(duan)(duan)子15與(yu)封(feng)口(kou)板(ban)(ban)21接觸(chu)。在(zai)(zai)封(feng)口(kou)板(ban)(ban)21設置(zhi)用于注(zhu)(zhu)(zhu)入(ru)(ru)電(dian)解(jie)(jie)液(ye)的(de)電(dian)解(jie)(jie)液(ye)注(zhu)(zhu)(zhu)液(ye)口(kou)，該電(dian)解(jie)(jie)液(ye)注(zhu)(zhu)(zhu)液(ye)口(kou)在(zai)(zai)注(zhu)(zhu)(zhu)入(ru)(ru)電(dian)解(jie)(jie)液(ye)后(hou)被密封(feng)構件24密封(feng)。此外(wai)(wai)，在(zai)(zai)封(feng)口(kou)板(ban)(ban)21設置(zhi)了排出閥(fa)26，排出閥(fa)26在(zai)(zai)外(wai)(wai)封(feng)裝體20的(de)內部壓力上升時釋放(fang)壓力。

接下來(lai)，對負極端子16附近的(de)封口板(ban)21及其周圍的(de)構造進行(xing)說明。

圖(tu)2是負(fu)極端子16附近的(de)封(feng)口板21的(de)示意性(xing)剖視圖(tu)。此(ci)外，圖(tu)3是設置(zhi)在封(feng)口板21的(de)第1貫通孔(kong)25的(de)周邊的(de)放大(da)剖視圖(tu)。

負(fu)極(ji)端(duan)子(zi)(zi)16在(zai)封(feng)(feng)口板(ban)21的(de)內面(mian)側焊(han)接(jie)連(lian)(lian)接(jie)于(yu)負(fu)極(ji)集(ji)(ji)電(dian)體14的(de)基部14a，在(zai)封(feng)(feng)口板(ban)21的(de)外(wai)面(mian)側通(tong)過(guo)鉚接(jie)與(yu)第2電(dian)極(ji)連(lian)(lian)接(jie)構(gou)件18連(lian)(lian)接(jie)。據此，負(fu)極(ji)端(duan)子(zi)(zi)16固定(ding)在(zai)封(feng)(feng)口板(ban)21。另外(wai)，也可以將(jiang)(jiang)負(fu)極(ji)端(duan)子(zi)(zi)16在(zai)封(feng)(feng)口板(ban)21的(de)內面(mian)側通(tong)過(guo)鉚接(jie)連(lian)(lian)接(jie)于(yu)負(fu)極(ji)集(ji)(ji)電(dian)體14的(de)基部14a。此外(wai)，也可以將(jiang)(jiang)負(fu)極(ji)端(duan)子(zi)(zi)16在(zai)封(feng)(feng)口板(ban)21的(de)外(wai)面(mian)側通(tong)過(guo)焊(han)接(jie)與(yu)第2電(dian)極(ji)連(lian)(lian)接(jie)構(gou)件18連(lian)(lian)接(jie)。

若(ruo)以使由(you)封(feng)(feng)(feng)口(kou)(kou)(kou)(kou)(kou)板(ban)(ban)21封(feng)(feng)(feng)口(kou)(kou)(kou)(kou)(kou)的(de)外封(feng)(feng)(feng)裝體20的(de)開(kai)口(kou)(kou)(kou)(kou)(kou)部位于(yu)上(shang)側(ce)的(de)狀態(tai)配置(zhi)二次電池1，則(ze)第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25上(shang)下(xia)貫(guan)(guan)(guan)(guan)(guan)通封(feng)(feng)(feng)口(kou)(kou)(kou)(kou)(kou)板(ban)(ban)21。該第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25的(de)下(xia)側(ce)由(you)可變構件40進行(xing)了密(mi)閉(bi)。此外，在(zai)第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25的(de)上(shang)側(ce)(外面側(ce))配置(zhi)具有比第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25的(de)內(nei)(nei)徑大的(de)外徑的(de)導電性通電構件45，載置(zhi)于(yu)封(feng)(feng)(feng)口(kou)(kou)(kou)(kou)(kou)板(ban)(ban)21。第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25被在(zai)封(feng)(feng)(feng)口(kou)(kou)(kou)(kou)(kou)板(ban)(ban)21的(de)上(shang)側(ce)開(kai)口(kou)(kou)(kou)(kou)(kou)和(he)下(xia)側(ce)開(kai)口(kou)(kou)(kou)(kou)(kou)之間(jian)存在(zai)的(de)薄壁的(de)凸部60包圍。即，在(zai)圖中沿水(shui)平方向突(tu)出的(de)凸部60的(de)突(tu)出的(de)前端所(suo)包圍的(de)部分成為第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25。封(feng)(feng)(feng)口(kou)(kou)(kou)(kou)(kou)板(ban)(ban)21的(de)上(shang)側(ce)開(kai)口(kou)(kou)(kou)(kou)(kou)和(he)下(xia)側(ce)開(kai)口(kou)(kou)(kou)(kou)(kou)的(de)內(nei)(nei)徑都比第1貫(guan)(guan)(guan)(guan)(guan)通孔(kong)25的(de)內(nei)(nei)徑大。

通(tong)(tong)電構件45配置(zhi)在(zai)由封口(kou)(kou)板21的(de)上側(外(wai)面側)的(de)開(kai)口(kou)(kou)和凸(tu)部(bu)60形成的(de)第(di)(di)1凹(ao)部(bu)24a(凸(tu)部(bu)60的(de)上表(biao)面側)。即，通(tong)(tong)電構件45的(de)周緣部(bu)分置(zhi)于(yu)凸(tu)部(bu)60的(de)上表(biao)面。而(er)且，第(di)(di)1貫通(tong)(tong)孔25位(wei)于(yu)第(di)(di)1凹(ao)部(bu)24a內。

可(ke)變(bian)構(gou)(gou)件(jian)40配置(zhi)在由(you)封口板21的(de)下(xia)側(內面側)的(de)開口和(he)凸(tu)部(bu)60形(xing)成的(de)第(di)(di)2凹(ao)部(bu)24b(凸(tu)部(bu)60的(de)下(xia)表面側)。即，可(ke)變(bian)構(gou)(gou)件(jian)40的(de)周緣部(bu)分設(she)置(zhi)為(wei)與凸(tu)部(bu)60的(de)下(xia)表面接(jie)觸(chu)。此外，第(di)(di)1貫通孔25位于第(di)(di)2凹(ao)部(bu)24b內。而且，可(ke)變(bian)構(gou)(gou)件(jian)40的(de)周緣部(bu)分焊接(jie)在第(di)(di)2凹(ao)部(bu)24b的(de)邊緣而被固定。

在(zai)(zai)可變(bian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)40的(de)(de)上方(fang)(外(wai)側)配置(zhi)(zhi)第(di)2電(dian)(dian)(dian)(dian)極連接構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)18，通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45位于可變(bian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)40與(yu)第(di)2電(dian)(dian)(dian)(dian)極連接構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)18之間。在(zai)(zai)第(di)2電(dian)(dian)(dian)(dian)極連接構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)18與(yu)通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45之間，配置(zhi)(zhi)了(le)(le)絕緣(yuan)(yuan)(yuan)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)19。絕緣(yuan)(yuan)(yuan)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)19具有上下方(fang)向(xiang)的(de)(de)第(di)2貫(guan)通(tong)孔27，存在(zai)(zai)于通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45的(de)(de)上表面的(de)(de)突(tu)出(chu)部46突(tu)出(chu)于第(di)2貫(guan)通(tong)孔27內。此(ci)外(wai)，在(zai)(zai)第(di)2貫(guan)通(tong)孔27內且(qie)突(tu)出(chu)部46的(de)(de)周邊(bian)，配置(zhi)(zhi)了(le)(le)電(dian)(dian)(dian)(dian)絕緣(yuan)(yuan)(yuan)性的(de)(de)彈性構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)55。該彈性構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)55例如由電(dian)(dian)(dian)(dian)絕緣(yuan)(yuan)(yuan)性的(de)(de)彈性樹脂構(gou)(gou)(gou)成(cheng)，處于第(di)2電(dian)(dian)(dian)(dian)極連接構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)18與(yu)通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45之間，將兩者隔開。優選(xuan)絕緣(yuan)(yuan)(yuan)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)19的(de)(de)厚度小于突(tu)出(chu)部46的(de)(de)突(tu)出(chu)高度，彈性構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)55的(de)(de)厚度大于突(tu)出(chu)部46的(de)(de)突(tu)出(chu)高度。據此(ci)，成(cheng)為(wei)通(tong)過(guo)彈性構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)55將通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45按壓在(zai)(zai)封(feng)口(kou)板(ban)21的(de)(de)狀(zhuang)態。因此(ci)，在(zai)(zai)電(dian)(dian)(dian)(dian)池(chi)使用時能夠有效地防止通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45由于振動、沖擊等而活動。此(ci)外(wai)，優選(xuan)絕緣(yuan)(yuan)(yuan)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)19和通(tong)電(dian)(dian)(dian)(dian)構(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)45處于非(fei)接觸的(de)(de)狀(zhuang)態。

在可(ke)(ke)變(bian)(bian)構(gou)件(jian)40的(de)(de)(de)(de)(de)(de)下(xia)方(fang)，與可(ke)(ke)變(bian)(bian)構(gou)件(jian)40對置地配(pei)置負(fu)極(ji)(ji)集(ji)電(dian)(dian)(dian)體(ti)(ti)14的(de)(de)(de)(de)(de)(de)基(ji)(ji)部(bu)(bu)14a。負(fu)極(ji)(ji)集(ji)電(dian)(dian)(dian)體(ti)(ti)14的(de)(de)(de)(de)(de)(de)基(ji)(ji)部(bu)(bu)14a的(de)(de)(de)(de)(de)(de)下(xia)面是收納電(dian)(dian)(dian)極(ji)(ji)體(ti)(ti)10的(de)(de)(de)(de)(de)(de)空(kong)間。在負(fu)極(ji)(ji)集(ji)電(dian)(dian)(dian)體(ti)(ti)14的(de)(de)(de)(de)(de)(de)基(ji)(ji)部(bu)(bu)14a設置了第(di)3貫通(tong)(tong)(tong)孔(kong)(kong)28。上(shang)部(bu)(bu)側的(de)(de)(de)(de)(de)(de)負(fu)極(ji)(ji)集(ji)電(dian)(dian)(dian)體(ti)(ti)14的(de)(de)(de)(de)(de)(de)基(ji)(ji)部(bu)(bu)14a除了第(di)3貫通(tong)(tong)(tong)孔(kong)(kong)28之外覆蓋可(ke)(ke)變(bian)(bian)構(gou)件(jian)40的(de)(de)(de)(de)(de)(de)整個下(xia)表(biao)面。而(er)且(qie)(qie)，在負(fu)極(ji)(ji)集(ji)電(dian)(dian)(dian)體(ti)(ti)14的(de)(de)(de)(de)(de)(de)基(ji)(ji)部(bu)(bu)14a與可(ke)(ke)變(bian)(bian)構(gou)件(jian)40之間，配(pei)置了電(dian)(dian)(dian)池內(nei)部(bu)(bu)絕緣構(gou)件(jian)54。而(er)且(qie)(qie)，電(dian)(dian)(dian)池內(nei)部(bu)(bu)絕緣構(gou)件(jian)54具有第(di)4貫通(tong)(tong)(tong)孔(kong)(kong)29。第(di)3貫通(tong)(tong)(tong)孔(kong)(kong)28和(he)第(di)4貫通(tong)(tong)(tong)孔(kong)(kong)29的(de)(de)(de)(de)(de)(de)內(nei)徑大小大致相同，并(bing)配(pei)置為雙方(fang)的(de)(de)(de)(de)(de)(de)貫通(tong)(tong)(tong)孔(kong)(kong)重(zhong)疊而(er)連通(tong)(tong)(tong)。根據(ju)以上(shang)構(gou)成，收納了電(dian)(dian)(dian)極(ji)(ji)體(ti)(ti)10的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)池內(nei)部(bu)(bu)空(kong)間通(tong)(tong)(tong)過(guo)第(di)3貫通(tong)(tong)(tong)孔(kong)(kong)28和(he)第(di)4貫通(tong)(tong)(tong)孔(kong)(kong)29連接(jie)到可(ke)(ke)變(bian)(bian)構(gou)件(jian)40的(de)(de)(de)(de)(de)(de)下(xia)表(biao)面。

可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40由(you)金屬等的(de)(de)(de)(de)(de)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)性薄板(ban)構(gou)(gou)(gou)(gou)成(cheng)，在(zai)中(zhong)央(yang)部分(fen)具有彎折為u字(zi)狀(zhuang)而(er)(er)(er)(er)形(xing)(xing)成(cheng)為臺狀(zhuang)的(de)(de)(de)(de)(de)向(xiang)上(shang)方突(tu)(tu)出(chu)的(de)(de)(de)(de)(de)按壓(ya)(ya)(ya)(ya)(ya)部42。可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40的(de)(de)(de)(de)(de)厚度小(xiao)于(yu)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45的(de)(de)(de)(de)(de)突(tu)(tu)出(chu)部46的(de)(de)(de)(de)(de)厚度。若(ruo)由(you)于(yu)過(guo)充(chong)電(dian)(dian)(dian)(dian)(dian)等，在(zai)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)1內(nei)(nei)(nei)部產生過(guo)度的(de)(de)(de)(de)(de)熱，或(huo)者電(dian)(dian)(dian)(dian)(dian)解液分(fen)解而(er)(er)(er)(er)導(dao)(dao)致電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)(nei)部(外(wai)封(feng)(feng)裝體20內(nei)(nei)(nei)部)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)力(li)上(shang)升，則(ze)該壓(ya)(ya)(ya)(ya)(ya)力(li)施加到(dao)可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40的(de)(de)(de)(de)(de)下(xia)表面側。若(ruo)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)(nei)部壓(ya)(ya)(ya)(ya)(ya)力(li)變(bian)(bian)為規定(ding)(ding)值(zhi)以上(shang)，則(ze)可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40變(bian)(bian)形(xing)(xing)從(cong)而(er)(er)(er)(er)中(zhong)央(yang)部分(fen)向(xiang)上(shang)方移動。在(zai)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)(nei)部壓(ya)(ya)(ya)(ya)(ya)力(li)不足規定(ding)(ding)值(zhi)時(shi)，可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40和通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45不接(jie)(jie)觸(chu)，在(zai)兩者之間(jian)存在(zai)間(jian)隙。若(ruo)內(nei)(nei)(nei)部壓(ya)(ya)(ya)(ya)(ya)力(li)變(bian)(bian)為規定(ding)(ding)值(zhi)以上(shang)則(ze)可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40的(de)(de)(de)(de)(de)中(zhong)央(yang)部的(de)(de)(de)(de)(de)按壓(ya)(ya)(ya)(ya)(ya)部42與通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45接(jie)(jie)觸(chu)，并且將(jiang)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45向(xiang)上(shang)方推(tui)壓(ya)(ya)(ya)(ya)(ya)。由(you)此(ci)，在(zai)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)(nei)部壓(ya)(ya)(ya)(ya)(ya)力(li)不足規定(ding)(ding)值(zhi)時(shi)為非接(jie)(jie)觸(chu)狀(zhuang)態(tai)的(de)(de)(de)(de)(de)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45和第(di)2電(dian)(dian)(dian)(dian)(dian)極(ji)連接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)18，會通(tong)(tong)(tong)過(guo)壓(ya)(ya)(ya)(ya)(ya)縮彈(dan)性構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)55而(er)(er)(er)(er)接(jie)(jie)觸(chu)。即，通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45的(de)(de)(de)(de)(de)突(tu)(tu)出(chu)部46和第(di)2電(dian)(dian)(dian)(dian)(dian)極(ji)連接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)18的(de)(de)(de)(de)(de)與突(tu)(tu)出(chu)部46相對的(de)(de)(de)(de)(de)部分(fen)接(jie)(jie)觸(chu)。據此(ci)，形(xing)(xing)成(cheng)從(cong)負極(ji)端子16到(dao)第(di)2電(dian)(dian)(dian)(dian)(dian)極(ji)連接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)18、通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45、可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40、封(feng)(feng)口板(ban)21、正極(ji)連接(jie)(jie)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)17、正極(ji)端子15這樣的(de)(de)(de)(de)(de)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)路徑，進行放電(dian)(dian)(dian)(dian)(dian)從(cong)而(er)(er)(er)(er)消(xiao)滅電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)(nei)部的(de)(de)(de)(de)(de)過(guo)充(chong)電(dian)(dian)(dian)(dian)(dian)。如此(ci)二次電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)1的(de)(de)(de)(de)(de)可(ke)靠性提高。另外(wai)，也(ye)可(ke)以設為電(dian)(dian)(dian)(dian)(dian)流從(cong)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)45不經過(guo)可(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)40而(er)(er)(er)(er)流到(dao)封(feng)(feng)口板(ban)21的(de)(de)(de)(de)(de)結構(gou)(gou)(gou)(gou)。

在(zai)本實施方式的(de)二(er)次(ci)(ci)電(dian)(dian)(dian)池(chi)1中，因為(wei)通電(dian)(dian)(dian)構(gou)件(jian)(jian)(jian)45的(de)外徑大(da)于第(di)1貫通孔25的(de)內(nei)徑，所以與專(zhuan)利(li)文獻1所公開的(de)電(dian)(dian)(dian)池(chi)不(bu)同，即使在(zai)對(dui)二(er)次(ci)(ci)電(dian)(dian)(dian)池(chi)1施加了沖(chong)擊(ji)、振(zhen)動等的(de)情(qing)(qing)況下，通電(dian)(dian)(dian)構(gou)件(jian)(jian)(jian)45也不(bu)會對(dui)可變(bian)(bian)(bian)構(gou)件(jian)(jian)(jian)40施加負(fu)荷，所以不(bu)會產生可變(bian)(bian)(bian)構(gou)件(jian)(jian)(jian)40的(de)變(bian)(bian)(bian)形(xing)/損傷。因此，即使在(zai)對(dui)電(dian)(dian)(dian)池(chi)施加了沖(chong)擊(ji)、振(zhen)動后(hou)，基(ji)于內(nei)部(bu)壓(ya)上升的(de)短路機構(gou)也會可靠地(di)發(fa)揮(hui)功(gong)能。因此，成為(wei)可靠性進一(yi)步提(ti)高的(de)二(er)次(ci)(ci)電(dian)(dian)(dian)池(chi)。此外，進一(yi)步優選可變(bian)(bian)(bian)構(gou)件(jian)(jian)(jian)40和通電(dian)(dian)(dian)構(gou)件(jian)(jian)(jian)45在(zai)電(dian)(dian)(dian)池(chi)內(nei)部(bu)的(de)壓(ya)力不(bu)足規定值的(de)情(qing)(qing)況下非接觸。據此，能夠進一(yi)步可靠地(di)防止通電(dian)(dian)(dian)構(gou)件(jian)(jian)(jian)45對(dui)可變(bian)(bian)(bian)構(gou)件(jian)(jian)(jian)40給予負(fu)荷，能夠更(geng)有效地(di)防止可變(bian)(bian)(bian)構(gou)件(jian)(jian)(jian)40的(de)變(bian)(bian)(bian)形(xing)/損傷。

由(you)于構(gou)(gou)成為(wei)在通(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45設置(zhi)突出(chu)部(bu)(bu)46，在電(dian)(dian)池內部(bu)(bu)壓力(li)變為(wei)規定值(zhi)以(yi)上的(de)(de)(de)情況下，該(gai)突出(chu)部(bu)(bu)46與(yu)第2電(dian)(dian)極(ji)(ji)連(lian)接(jie)構(gou)(gou)件(jian)(jian)18接(jie)觸，因(yin)此可靠地(di)發(fa)生(sheng)兩者(zhe)的(de)(de)(de)接(jie)觸，此外由(you)于將通(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45與(yu)第2電(dian)(dian)極(ji)(ji)連(lian)接(jie)構(gou)(gou)件(jian)(jian)18進(jin)行(xing)接(jie)觸的(de)(de)(de)部(bu)(bu)分(fen)的(de)(de)(de)面積設為(wei)所(suo)需最小限度(du)，因(yin)此將因(yin)振動、沖擊等而引起的(de)(de)(de)兩者(zhe)接(jie)觸這樣的(de)(de)(de)危險(xian)性抑制為(wei)最小限度(du)。

由(you)于可(ke)變(bian)(bian)構(gou)(gou)件(jian)(jian)(jian)40的(de)厚度小于通(tong)(tong)(tong)電(dian)構(gou)(gou)件(jian)(jian)(jian)45中(zhong)的(de)突出(chu)部46的(de)厚度，所以相比于可(ke)變(bian)(bian)構(gou)(gou)件(jian)(jian)(jian)40，突出(chu)部46的(de)熱容(rong)(rong)量更大(da)，因(yin)此，在(zai)從第2電(dian)極連接(jie)構(gou)(gou)件(jian)(jian)(jian)18通(tong)(tong)(tong)過通(tong)(tong)(tong)電(dian)構(gou)(gou)件(jian)(jian)(jian)45向可(ke)變(bian)(bian)構(gou)(gou)件(jian)(jian)(jian)40通(tong)(tong)(tong)電(dian)的(de)情(qing)況下，所產生的(de)熱主要由(you)熱容(rong)(rong)量較大(da)的(de)通(tong)(tong)(tong)電(dian)構(gou)(gou)件(jian)(jian)(jian)45吸收(shou)，能夠(gou)(gou)避免可(ke)變(bian)(bian)構(gou)(gou)件(jian)(jian)(jian)40的(de)溫度上升至達到熔斷(duan)，能夠(gou)(gou)充分(fen)確保(bao)通(tong)(tong)(tong)電(dian)時間。

通(tong)電構(gou)(gou)件45配置(zhi)在(zai)設置(zhi)于封口(kou)板(ban)21的(de)第(di)1凹部24a內(nei)。因(yin)此(ci)，在(zai)可變(bian)構(gou)(gou)件40發(fa)生了變(bian)形時，朝(chao)向第(di)2電極連接構(gou)(gou)件18，使通(tong)電構(gou)(gou)件45沿(yan)一個方向順利地移動。另外(wai)，優選設置(zhi)于封口(kou)板(ban)21的(de)第(di)1凹部24a的(de)深度大于第(di)2凹部24b的(de)深度。

這(zhe)里(li)，優(you)選即使在(zai)可變(bian)構(gou)件40變(bian)形而通(tong)電(dian)構(gou)件45與第2電(dian)極(ji)連接構(gou)件18接觸之后，通(tong)電(dian)構(gou)件45的一部分也配置在(zai)設置于封口板21的第1凹(ao)部24a內。

由此，能夠(gou)使通電構件(jian)45和第2電極(ji)連接(jie)構件(jian)18的接(jie)觸(chu)位(wei)置(zhi)在規(gui)定(ding)(ding)位(wei)置(zhi)穩定(ding)(ding)地接(jie)觸(chu)，能夠(gou)更可靠地形成穩定(ding)(ding)的短路路徑。

優選(xuan)通(tong)(tong)(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45并(bing)未通(tong)(tong)(tong)過粘(zhan)合、焊接(jie)等與封(feng)口板(ban)21連接(jie)，而僅是(shi)配(pei)置在封(feng)口板(ban)21上。但是(shi)，也可以(yi)由(you)較弱的(de)(de)力將通(tong)(tong)(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45連接(jie)于封(feng)口板(ban)21，以(yi)至于通(tong)(tong)(tong)過可變構(gou)(gou)件(jian)(jian)40的(de)(de)變形而能夠使通(tong)(tong)(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45移動的(de)(de)程度。例(li)如，可以(yi)考慮(lv)通(tong)(tong)(tong)過粘(zhan)合劑等將通(tong)(tong)(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45粘(zhan)合于封(feng)口板(ban)21的(de)(de)方(fang)法(fa)、局部地將通(tong)(tong)(tong)電(dian)(dian)構(gou)(gou)件(jian)(jian)45焊接(jie)于封(feng)口板(ban)21的(de)(de)方(fang)法(fa)等。

可(ke)(ke)變構件(jian)40配(pei)置在設置于封(feng)口板21的(de)(de)第2凹部24b內，可(ke)(ke)變構件(jian)40的(de)(de)周緣(yuan)部被焊接于第2凹部24b的(de)(de)邊緣(yuan)，所以(yi)可(ke)(ke)變構件(jian)40可(ke)(ke)靠(kao)地(di)電連接/固定于封(feng)口板21，并且可(ke)(ke)靠(kao)地(di)密閉(bi)了第1貫通孔25。

在電(dian)池內部(bu)的壓(ya)力(li)(li)(li)變(bian)為(wei)規定(ding)值以上(shang)(shang)時，可變(bian)構(gou)件(jian)40變(bian)形而對(dui)通(tong)(tong)電(dian)構(gou)件(jian)45施加向上(shang)(shang)的力(li)(li)(li)，由于(yu)該力(li)(li)(li)致使(shi)彈(dan)性構(gou)件(jian)55收縮，通(tong)(tong)電(dian)構(gou)件(jian)45與第2電(dian)極連接構(gou)件(jian)18接觸(chu)，因此不產生通(tong)(tong)電(dian)構(gou)件(jian)45自身的變(bian)形，用于(yu)使(shi)通(tong)(tong)電(dian)構(gou)件(jian)45變(bian)形的應(ying)力(li)(li)(li)損失少，動作壓(ya)力(li)(li)(li)穩(wen)定(ding)。此外，因為(wei)存在彈(dan)性構(gou)件(jian)55，所以能夠可靠地防止通(tong)(tong)電(dian)構(gou)件(jian)45和第2電(dian)極連接構(gou)件(jian)18的誤接觸(chu)。另外，若突出(chu)部(bu)46的上(shang)(shang)表(biao)面平坦，則與第2電(dian)極連接構(gou)件(jian)18的接觸(chu)面積變(bian)大(da)，優(you)選(xuan)。

由(you)于可變構件40的(de)(de)中央部的(de)(de)按壓部42的(de)(de)上表(biao)面(mian)平坦且(qie)具有(you)一定程度的(de)(de)面(mian)積，因(yin)此能夠(gou)(gou)將通電(dian)(dian)構件45可靠地(di)向上推壓而使突出部46與第2電(dian)(dian)極連接(jie)構件18可靠地(di)接(jie)觸，并且(qie)能夠(gou)(gou)降低按壓部42和通電(dian)(dian)構件45的(de)(de)接(jie)觸部分的(de)(de)通電(dian)(dian)電(dian)(dian)阻，從而能夠(gou)(gou)減少熔(rong)斷的(de)(de)風(feng)險。

-變形例-

在(zai)上述(shu)實施(shi)方式中，示出了在(zai)可(ke)變(bian)構件40的(de)(de)變(bian)形前(qian)的(de)(de)狀態下正(zheng)極(ji)板(ban)、封(feng)(feng)口(kou)(kou)板(ban)21以(yi)及(ji)可(ke)變(bian)構件40電連(lian)接(jie)(jie)的(de)(de)形態。但是，這種(zhong)結構不是必須的(de)(de)。也可(ke)以(yi)是如下機(ji)構：在(zai)可(ke)變(bian)構件40的(de)(de)變(bian)形前(qian)的(de)(de)狀態下，封(feng)(feng)口(kou)(kou)板(ban)21與正(zheng)極(ji)板(ban)以(yi)及(ji)負(fu)極(ji)板(ban)的(de)(de)任(ren)意一者都(dou)不電連(lian)接(jie)(jie)，在(zai)外封(feng)(feng)裝(zhuang)體20的(de)(de)內部壓力變(bian)為(wei)設定(ding)值以(yi)上時(shi)，正(zheng)極(ji)板(ban)和(he)封(feng)(feng)口(kou)(kou)板(ban)21電連(lian)接(jie)(jie)，并(bing)且負(fu)極(ji)和(he)封(feng)(feng)口(kou)(kou)板(ban)21電連(lian)接(jie)(jie)。圖(tu)4中示出這種(zhong)變(bian)形例。

如圖4所(suo)示，在(zai)(zai)本(ben)變形(xing)例(li)所(suo)涉(she)及(ji)的(de)二次電(dian)池中，在(zai)(zai)正極(ji)側也配(pei)置與(yu)(yu)負極(ji)側相同材質、相同形(xing)狀的(de)可變構(gou)件(jian)(jian)40b、通(tong)電(dian)構(gou)件(jian)(jian)45b、絕緣構(gou)件(jian)(jian)19b，形(xing)成了與(yu)(yu)負極(ji)相同的(de)用于(yu)短路(lu)的(de)機構(gou)。此外，可變構(gou)件(jian)(jian)40b以(yi)及(ji)通(tong)電(dian)構(gou)件(jian)(jian)45b與(yu)(yu)正極(ji)端子15電(dian)絕緣。而且，若(ruo)電(dian)池內部壓(ya)(ya)力變為規定值以(yi)上(shang)(shang)，則(ze)可變構(gou)件(jian)(jian)40b變形(xing)而將(jiang)通(tong)電(dian)構(gou)件(jian)(jian)45b向上(shang)(shang)方推壓(ya)(ya)，通(tong)電(dian)構(gou)件(jian)(jian)45b與(yu)(yu)正極(ji)連接(jie)構(gou)件(jian)(jian)17接(jie)觸。

在本變形例中(zhong)，在電池內部壓力不(bu)足規定值的情(qing)況下，封口板21與(yu)正(zheng)極、負極的任意一(yi)者都不(bu)電連接，因此安全(quan)性更高。

(實施方式2)

實(shi)施(shi)方(fang)(fang)式2所(suo)涉及(ji)的(de)二次電(dian)池，僅(jin)可(ke)變構(gou)件的(de)形狀(zhuang)與(yu)(yu)實(shi)施(shi)方(fang)(fang)式1不同，其他的(de)結構(gou)、構(gou)造等都(dou)與(yu)(yu)實(shi)施(shi)方(fang)(fang)式1相同，所(suo)以(yi)下面基于圖5來(lai)說明(ming)與(yu)(yu)實(shi)施(shi)方(fang)(fang)式1不同的(de)部(bu)分，而其以(yi)外的(de)部(bu)分因為與(yu)(yu)實(shi)施(shi)方(fang)(fang)式1所(suo)說明(ming)的(de)部(bu)分相同所(suo)以(yi)省略說明(ming)。

如圖(tu)5所(suo)示，對(dui)于(yu)本實(shi)施(shi)方式(shi)的(de)(de)可變(bian)構(gou)件(jian)47而(er)言，按壓部(bu)(bu)48設置(zhi)在與彈(dan)性(xing)構(gou)件(jian)55對(dui)應的(de)(de)部(bu)(bu)分，而(er)不(bu)是突(tu)出部(bu)(bu)46的(de)(de)下面(mian)。由于(yu)這(zhe)樣(yang)設置(zhi)按壓部(bu)(bu)48，所(suo)以若電(dian)池(chi)內部(bu)(bu)的(de)(de)壓力變(bian)為規定值(zhi)以上(shang)從而(er)可變(bian)構(gou)件(jian)47發生變(bian)形，則按壓部(bu)(bu)48按壓通電(dian)構(gou)件(jian)45的(de)(de)與彈(dan)性(xing)構(gou)件(jian)55對(dui)置(zhi)的(de)(de)區域。由此，對(dui)彈(dan)性(xing)構(gou)件(jian)55高(gao)效地(di)施(shi)加(jia)壓力，突(tu)出部(bu)(bu)46和第2電(dian)極連接構(gou)件(jian)18可靠地(di)接觸(chu)。

(實施方式3)

實施(shi)方(fang)式(shi)3是涉及將(jiang)(jiang)實施(shi)方(fang)式(shi)1所(suo)涉及的(de)(de)(de)二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1排(pai)(pai)列多個而構(gou)(gou)(gou)(gou)成的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)組(zu)(zu)(二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)集合體(ti))的(de)(de)(de)實施(shi)方(fang)式(shi)。圖(tu)6是示(shi)出(chu)了將(jiang)(jiang)實施(shi)方(fang)式(shi)1所(suo)涉及的(de)(de)(de)二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1排(pai)(pai)列6個并進行串聯連(lian)接(jie)，構(gou)(gou)(gou)(gou)成了電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)組(zu)(zu)50的(de)(de)(de)示(shi)例(li)的(de)(de)(de)立體(ti)圖(tu)。如圖(tu)5所(suo)示(shi)，交替調換各二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1的(de)(de)(de)正(zheng)(zheng)極(ji)(ji)端(duan)子(zi)15以(yi)(yi)及負極(ji)(ji)端(duan)子(zi)16的(de)(de)(de)位置(zhi)來(lai)進行排(pai)(pai)列，將(jiang)(jiang)相鄰的(de)(de)(de)二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1的(de)(de)(de)正(zheng)(zheng)極(ji)(ji)端(duan)子(zi)15和(he)負極(ji)(ji)端(duan)子(zi)16用母線(xian)(外部(bu)導電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian))60進行接(jie)合，由此將(jiang)(jiang)6個二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1串聯電(dian)(dian)(dian)(dian)(dian)連(lian)接(jie)。當然，也(ye)(ye)可(ke)(ke)以(yi)(yi)將(jiang)(jiang)6個二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1并聯電(dian)(dian)(dian)(dian)(dian)連(lian)接(jie)。若在與通(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)45的(de)(de)(de)突出(chu)部(bu)46對置(zhi)的(de)(de)(de)位置(zhi)連(lian)接(jie)母線(xian)60，則通(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)45與第(di)2電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)構(gou)(gou)(gou)(gou)件(jian)18通(tong)電(dian)(dian)(dian)(dian)(dian)時的(de)(de)(de)熱也(ye)(ye)流入母線(xian)60，通(tong)電(dian)(dian)(dian)(dian)(dian)構(gou)(gou)(gou)(gou)件(jian)45、可(ke)(ke)變(bian)(bian)構(gou)(gou)(gou)(gou)件(jian)40變(bian)(bian)得更加難以(yi)(yi)熔斷，優(you)選。另外，也(ye)(ye)可(ke)(ke)以(yi)(yi)取代實施(shi)方(fang)式(shi)1所(suo)涉及的(de)(de)(de)二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)1而使用實施(shi)方(fang)式(shi)2所(suo)涉及的(de)(de)(de)二次(ci)(ci)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)來(lai)構(gou)(gou)(gou)(gou)成電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)組(zu)(zu)。

(其他實施方式)

上述實(shi)施方式是本(ben)申請發(fa)明的例(li)示(shi)(shi)，本(ben)申請發(fa)明不限(xian)定(ding)于這(zhe)些示(shi)(shi)例(li)，也(ye)可以對(dui)這(zhe)些示(shi)(shi)例(li)組(zu)合周知技(ji)術(shu)(shu)、慣用技(ji)術(shu)(shu)、公知技(ji)術(shu)(shu)或者替(ti)換一部(bu)分。此外，本(ben)領(ling)域技(ji)術(shu)(shu)人員容(rong)易(yi)想(xiang)到的改變發(fa)明也(ye)包含在本(ben)申請發(fa)明中。

在(zai)上(shang)述實施方式(shi)中，第1電極為正極、第2電極為負極，但也(ye)可以相(xiang)反。此(ci)外，也(ye)可以并用(yong)上(shang)述機構(gou)以外的安全機構(gou)(例(li)如熔絲(si)機構(gou))。在(zai)該情況下(xia)，優選在(zai)正極集電體(ti)或者在(zai)外封裝體(ti)外部(bu)與(yu)正極端子連接(jie)的正極連接(jie)構(gou)件等設置熔絲(si)部(bu)，通(tong)過(guo)短(duan)路機構(gou)動(dong)作時產(chan)生的短(duan)路電流，熔絲(si)部(bu)熔斷。

二(er)次電(dian)池(chi)(chi)(chi)的(de)種類沒有特別限定(ding)，例如(ru)，可(ke)以(yi)列(lie)舉鋰離子(zi)二(er)次電(dian)池(chi)(chi)(chi)。電(dian)池(chi)(chi)(chi)的(de)形狀不限定(ding)于長方體。電(dian)池(chi)(chi)(chi)內部(bu)的(de)壓力(li)的(de)規定(ding)值(zhi)，可(ke)以(yi)根據(ju)電(dian)池(chi)(chi)(chi)的(de)構(gou)造(zao)/大小、電(dian)池(chi)(chi)(chi)容量、正極/負(fu)極的(de)材(cai)料等(deng)來決(jue)定(ding)。

外(wai)封裝(zhuang)體(ti)以(yi)及封口(kou)板優選為鋁或(huo)者鋁合(he)金(jin)制。通電構件(jian)以(yi)及可變構件(jian)也優選為鋁或(huo)者鋁合(he)金(jin)。

對于(yu)第1～第4貫(guan)通(tong)孔，開口(kou)部(bu)的形狀可(ke)以是(shi)圓形，也可(ke)以是(shi)多邊形等。

無(wu)需在第1貫通(tong)孔的整個區域內通(tong)電(dian)(dian)構(gou)件(jian)的外徑都(dou)大(da)于第1貫通(tong)孔的內徑這(zhe)樣的結構(gou)，只要通(tong)電(dian)(dian)構(gou)件(jian)不會由(you)于沖擊、振動而對可變構(gou)件(jian)給(gei)予損傷/變形即可。也可以構(gou)成為可變構(gou)件(jian)和通(tong)電(dian)(dian)構(gou)件(jian)在電(dian)(dian)池內部壓力(li)為規定值以下的情況下接觸(chu)。

作(zuo)為正極(ji)芯(xin)體，優(you)(you)選(xuan)由鋁(lv)或者鋁(lv)合金(jin)(jin)(jin)構(gou)成，作(zuo)為負極(ji)芯(xin)體，優(you)(you)選(xuan)由銅或者銅合金(jin)(jin)(jin)構(gou)成，但(dan)是(shi)也可以(yi)采(cai)用其(qi)他(ta)的(de)金(jin)(jin)(jin)屬(shu)/導電(dian)性物質。作(zuo)為隔板，優(you)(you)選(xuan)聚烯烴(jing)制的(de)微(wei)多孔(kong)膜，但(dan)是(shi)也可以(yi)采(cai)用其(qi)他(ta)的(de)公知隔板。構(gou)成封口板、外封裝體的(de)材(cai)(cai)料只要是(shi)導電(dian)性材(cai)(cai)料則也沒有特別(bie)限定，但(dan)優(you)(you)選(xuan)為鋁(lv)等金(jin)(jin)(jin)屬(shu)。

彈(dan)性(xing)構(gou)件(jian)優(you)選(xuan)配置(zhi)在(zai)絕(jue)緣構(gou)件(jian)的(de)第2貫通孔內，但并(bing)(bing)不限定于此(ci)(ci)。此(ci)(ci)外，彈(dan)性(xing)構(gou)件(jian)也可以是包圍(wei)突出(chu)(chu)部的(de)環狀，還可以由(you)多個(ge)構(gou)件(jian)構(gou)成并(bing)(bing)將(jiang)突出(chu)(chu)部置(zhi)于它們的(de)配置(zhi)的(de)內側(ce)。彈(dan)性(xing)構(gou)件(jian)優(you)選(xuan)為(wei)橡膠，更優(you)選(xuan)為(wei)由(you)硅系橡膠構(gou)成。

此外，也可(ke)(ke)以通過(guo)壓(ya)制成型等來在封口(kou)板形成可(ke)(ke)變(bian)構件(jian)，從(cong)而在封口(kou)板一體(ti)地形成可(ke)(ke)變(bian)構件(jian)。在該情況下(xia)，也設(she)為設(she)置于封口(kou)板的貫通孔被可(ke)(ke)變(bian)構件(jian)密(mi)閉。

可變構(gou)件(jian)(jian)的(de)按壓部(bu)可以是由曲(qu)面(mian)構(gou)成的(de)圓拱形狀(zhuang)。只要配置(zhi)為第(di)3貫(guan)(guan)通(tong)(tong)(tong)(tong)孔(kong)和(he)第(di)4貫(guan)(guan)通(tong)(tong)(tong)(tong)孔(kong)重疊(die)而連通(tong)(tong)(tong)(tong)即可，但優選(xuan)第(di)4貫(guan)(guan)通(tong)(tong)(tong)(tong)孔(kong)的(de)內徑比第(di)3貫(guan)(guan)通(tong)(tong)(tong)(tong)孔(kong)小。此(ci)外，優選(xuan)第(di)4貫(guan)(guan)通(tong)(tong)(tong)(tong)孔(kong)的(de)內徑小于(yu)第(di)1貫(guan)(guan)通(tong)(tong)(tong)(tong)孔(kong)，因為在由于(yu)通(tong)(tong)(tong)(tong)電(dian)構(gou)件(jian)(jian)和(he)第(di)2電(dian)極(ji)連接構(gou)件(jian)(jian)的(de)通(tong)(tong)(tong)(tong)電(dian)而產(chan)生了火花(hua)時，能夠防止火花(hua)飛散到電(dian)極(ji)體(ti)。