本實用新型涉(she)及功率(lv)半導體(ti)模塊，尤其(qi)涉(she)及一種(zhong)防(fang)端子拉弧燃燒的功率(lv)模塊。

背景技術：

全(quan)球能源危機與(yu)氣候變暖的威脅讓人們在(zai)追求經濟(ji)發(fa)展的同時(shi)越來越重視節能減排、低碳發(fa)展。隨著綠色環(huan)保在(zai)國際上的確立與(yu)推進(jin)，功率半(ban)導體(ti)的發(fa)展、應用前景更加廣闊(kuo)。

功率(lv)模塊在使(shi)用過程(cheng)中，由于控制(zhi)策略或干擾等原(yuan)因，存(cun)在電(dian)源短路、芯片爆炸(zha)的(de)風險。芯片爆炸(zha)時，會(hui)(hui)將覆蓋(gai)在芯片上的(de)硅凝膠掀開，并且會(hui)(hui)產生(sheng)大量(liang)導電(dian)性(xing)氣(qi)體。現(xian)有功率(lv)模塊正、負(fu)功率(lv)端子(zi)之(zhi)(zhi)間(jian)距離較近，且兩者之(zhi)(zhi)間(jian)并無絕緣防護措施，一(yi)旦發生(sheng)芯片爆炸(zha)便會(hui)(hui)在正、負(fu)功率(lv)端子(zi)之(zhi)(zhi)間(jian)出(chu)現(xian)拉(la)弧燃燒現(xian)象，從而(er)使(shi)整(zheng)機系統造(zao)成損(sun)失(shi)，甚(shen)至(zhi)威脅(xie)人身安全。

技術實現要素：

實(shi)用新型(xing)目(mu)的：針(zhen)對上述(shu)現(xian)有技術存在的缺陷，本實(shi)用新型(xing)旨在提供一種防止(zhi)因芯(xin)片爆炸而使正、負功率(lv)端子拉弧燃燒的功率(lv)模塊(kuai)，降低了對整機系統的危害，保證了極端情況下功率(lv)模塊(kuai)的安全性(xing)。

技術方(fang)案：一種(zhong)防(fang)端(duan)子(zi)(zi)(zi)(zi)拉弧燃燒的功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)模(mo)塊(kuai)，包括殼(ke)體和安裝在(zai)殼(ke)體內(nei)的功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)、與(yu)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)電(dian)連接(jie)的功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)片，所(suo)述功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)由(you)正極(ji)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)和負極(ji)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)組成，功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)片設(she)置在(zai)絕緣基板上，在(zai)所(suo)述正極(ji)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)與(yu)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)片之(zhi)間以及負極(ji)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)子(zi)(zi)(zi)(zi)與(yu)功(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)片之(zhi)間均設(she)有(you)絕緣防(fang)護罩。

進一步的(de)，所述(shu)絕(jue)緣(yuan)基板上(shang)設有(you)接(jie)線(xian)(xian)區(qu)銅層(ceng)，所述(shu)功(gong)率(lv)端(duan)(duan)子具有(you)功(gong)率(lv)端(duan)(duan)子連接(jie)部(bu)，功(gong)率(lv)端(duan)(duan)子連接(jie)部(bu)通過功(gong)率(lv)端(duan)(duan)邦定線(xian)(xian)與接(jie)線(xian)(xian)區(qu)銅層(ceng)相(xiang)連，接(jie)線(xian)(xian)區(qu)銅層(ceng)與功(gong)率(lv)芯(xin)(xin)片相(xiang)連；所述(shu)絕(jue)緣(yuan)防護罩覆蓋在功(gong)率(lv)端(duan)(duan)子和功(gong)率(lv)端(duan)(duan)邦定線(xian)(xian)的(de)上(shang)方，將功(gong)率(lv)端(duan)(duan)子連接(jie)部(bu)以及功(gong)率(lv)端(duan)(duan)邦定線(xian)(xian)均(jun)與功(gong)率(lv)芯(xin)(xin)片隔開。

進一(yi)步的(de)，所(suo)有(you)功(gong)率端子(zi)共用(yong)(yong)一(yi)個絕(jue)緣(yuan)防護(hu)罩(zhao)，所(suo)述絕(jue)緣(yuan)防護(hu)罩(zhao)包(bao)括互(hu)相垂(chui)直(zhi)的(de)共用(yong)(yong)前擋板(ban)和(he)共用(yong)(yong)頂(ding)擋板(ban)，共用(yong)(yong)前擋板(ban)與絕(jue)緣(yuan)基板(ban)垂(chui)直(zhi)，共用(yong)(yong)頂(ding)擋板(ban)自共用(yong)(yong)前擋板(ban)的(de)頂(ding)邊(bian)向外延伸(shen)并(bing)罩(zhao)在功(gong)率端子(zi)連接(jie)部(bu)的(de)上方。

進一步(bu)的(de)，所(suo)述功(gong)(gong)(gong)率端(duan)(duan)子有三(san)組(zu)，每組(zu)功(gong)(gong)(gong)率端(duan)(duan)子分別包括一個正極(ji)功(gong)(gong)(gong)率端(duan)(duan)子和(he)一個負(fu)極(ji)功(gong)(gong)(gong)率端(duan)(duan)子，每組(zu)功(gong)(gong)(gong)率端(duan)(duan)子的(de)功(gong)(gong)(gong)率端(duan)(duan)子連接部上方均設有一個絕緣(yuan)防(fang)護罩。

進一步(bu)的，所述絕緣(yuan)防護罩自功(gong)率端(duan)子連接部的上方呈(cheng)弧(hu)形延伸(shen)至(zhi)絕緣(yuan)基板處。

進一步的，所述(shu)絕(jue)緣(yuan)防護罩(zhao)的外側和/或內側設(she)有加強筋(jin)。

進一步的，位(wei)于中間(jian)位(wei)置的一個絕緣(yuan)防護罩(zhao)的兩(liang)側均設有(you)側擋(dang)板。

進(jin)一(yi)步的，所述(shu)(shu)絕緣防護罩包(bao)括(kuo)互相垂直的單獨前(qian)擋(dang)板(ban)(ban)和單獨頂(ding)擋(dang)板(ban)(ban)，所述(shu)(shu)單獨頂(ding)擋(dang)板(ban)(ban)與(yu)絕緣基板(ban)(ban)平行。

進一步的(de)，所述絕緣防(fang)(fang)護罩設(she)有限位(wei)結(jie)構，功率(lv)端子(zi)上方的(de)殼體開(kai)設(she)有與(yu)限位(wei)結(jie)構相適配的(de)槽(cao)，絕緣防(fang)(fang)護罩與(yu)殼體通(tong)過(guo)限位(wei)結(jie)構與(yu)槽(cao)進行(xing)裝配。

進一步的(de)，所(suo)述(shu)絕緣防護(hu)罩的(de)內(nei)部在正(zheng)(zheng)極(ji)功(gong)率(lv)端子與(yu)負(fu)極(ji)功(gong)率(lv)端子交界(jie)處的(de)上方(fang)對應位(wei)置設有隔板(ban)有益效果：本實用(yong)新型在功(gong)率(lv)模塊內(nei)部使用(yong)絕緣防護(hu)罩將正(zheng)(zheng)極(ji)功(gong)率(lv)端子、負(fu)極(ji)功(gong)率(lv)端子與(yu)芯片(pian)(pian)隔開，避免了(le)因芯片(pian)(pian)爆(bao)炸(zha)而使正(zheng)(zheng)、負(fu)功(gong)率(lv)端子導通(tong)而產生(sheng)拉弧燃燒(shao)的(de)現象(xiang)，降低了(le)對整機(ji)系統的(de)危害(hai)，保證了(le)極(ji)端情況下整機(ji)系統的(de)安全性。

附圖說明

圖(tu)1是本實用新型的實施例1內部結構示意圖(tu)；

圖(tu)2是本實(shi)用新型的實(shi)施例1絕緣防護罩安裝示意圖(tu)；

圖(tu)3a是本實(shi)用新(xin)型的(de)實(shi)施例1絕緣防(fang)護罩正(zheng)面(mian)示意圖(tu)；

圖3b是本實用新(xin)型的實施例1絕緣(yuan)防護(hu)罩(zhao)反(fan)面(mian)示意(yi)圖；

圖4是本實用新型的實施例2內部(bu)結構示意圖；

圖5是(shi)本實用新型的實施例2絕緣防護(hu)罩安裝(zhuang)示意圖；

圖6a是本(ben)實用新型的實施(shi)例2絕緣防護罩正面示意圖；

圖(tu)6b是本實(shi)用(yong)新型(xing)的實(shi)施例2絕(jue)緣防護(hu)罩反面示意圖(tu)；

圖7是本實用新型的實施(shi)例3內部結構示意圖；

圖(tu)8是(shi)本實用新型(xing)的實施例(li)3絕緣防(fang)護罩(zhao)安裝示意(yi)圖(tu)；

圖9a是本實用(yong)新型(xing)的實施例3絕(jue)緣防(fang)護罩(zhao)正面示意圖；

圖9b是本實用新型的(de)實施例3絕(jue)緣防護罩(zhao)反(fan)面(mian)示意圖。

具體實施方式

下面結合附圖(tu)對本(ben)技(ji)術(shu)方案進(jin)行詳細說明。

實施(shi)例1：如(ru)圖1所(suo)(suo)示(shi)，一種防(fang)端(duan)(duan)(duan)(duan)子拉弧(hu)燃燒的(de)(de)(de)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)模塊，包(bao)括殼體1和(he)安裝在殼體1內(nei)的(de)(de)(de)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子、與功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子電(dian)連接的(de)(de)(de)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)(xin)片(pian)(pian)(pian)(pian)2，所(suo)(suo)述功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子由(you)正極功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子4和(he)負(fu)極功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子3組成，此處所(suo)(suo)述的(de)(de)(de)功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子不包(bao)括輸出電(dian)極功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子，功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)(xin)片(pian)(pian)(pian)(pian)2設置在絕緣基板(ban)5上(shang)，在所(suo)(suo)述正極功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子4與功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)(xin)片(pian)(pian)(pian)(pian)2之間(jian)以及負(fu)極功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)端(duan)(duan)(duan)(duan)子3與功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)(lv)(lv)芯(xin)(xin)片(pian)(pian)(pian)(pian)2之間(jian)均設有(you)絕緣防(fang)護(hu)罩6。

絕緣基板5包括陶瓷絕緣層以及陶瓷絕緣層兩側的金屬層，陶瓷絕緣層的材料一般為Al₂O₃，或(huo)者AlN，厚度一般(ban)在0.25mm-1mm之(zhi)間；所述金屬層的(de)材料(liao)一般(ban)為Cu，或(huo)者Al，厚度通常為0.1mm-0.5mm之(zhi)間。絕(jue)緣基板5上的(de)功(gong)率(lv)(lv)芯片(pian)2材料(liao)為Si、SiC和GaN中的(de)一種或(huo)兩種。功(gong)率(lv)(lv)芯片(pian)2的(de)芯片(pian)類型為IGBT、MOSFET和FRD中的(de)一種或(huo)兩種。

功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2安裝在(zai)(zai)絕(jue)緣(yuan)基(ji)板5其(qi)中一(yi)側(ce)的金屬層(ceng)上(shang)，該金屬層(ceng)上(shang)設有(you)接(jie)線(xian)(xian)(xian)區(qu)(qu)銅(tong)層(ceng)51，功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)具有(you)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)連(lian)(lian)(lian)(lian)(lian)接(jie)部(bu)(bu)(bu)，功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)連(lian)(lian)(lian)(lian)(lian)接(jie)部(bu)(bu)(bu)即功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)用(yong)于與(yu)接(jie)線(xian)(xian)(xian)區(qu)(qu)銅(tong)層(ceng)51連(lian)(lian)(lian)(lian)(lian)接(jie)的部(bu)(bu)(bu)位，功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)連(lian)(lian)(lian)(lian)(lian)接(jie)部(bu)(bu)(bu)通過(guo)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)邦(bang)定線(xian)(xian)(xian)7與(yu)接(jie)線(xian)(xian)(xian)區(qu)(qu)銅(tong)層(ceng)51相(xiang)連(lian)(lian)(lian)(lian)(lian)，接(jie)線(xian)(xian)(xian)區(qu)(qu)銅(tong)層(ceng)51通過(guo)芯(xin)片(pian)(pian)端(duan)(duan)(duan)邦(bang)定線(xian)(xian)(xian)7與(yu)功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2相(xiang)連(lian)(lian)(lian)(lian)(lian)，其(qi)連(lian)(lian)(lian)(lian)(lian)接(jie)是本(ben)領域(yu)技(ji)術人員(yuan)按照公知常識為(wei)了實現電(dian)路功(gong)(gong)(gong)(gong)能按照電(dian)路邏(luo)輯關系(xi)進行(xing)的電(dian)連(lian)(lian)(lian)(lian)(lian)接(jie)而(er)非隨意(yi)的連(lian)(lian)(lian)(lian)(lian)接(jie)，也有(you)的功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2直接(jie)焊(han)接(jie)在(zai)(zai)接(jie)線(xian)(xian)(xian)區(qu)(qu)銅(tong)層(ceng)51上(shang)，從而(er)實現功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2與(yu)正、負功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)的連(lian)(lian)(lian)(lian)(lian)接(jie)；由于功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2與(yu)正極(ji)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)4和(he)負極(ji)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)3的距離較近，當功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2爆炸時，會(hui)(hui)將(jiang)填充(chong)在(zai)(zai)功(gong)(gong)(gong)(gong)率(lv)(lv)模(mo)塊內(nei)部(bu)(bu)(bu)的硅凝膠掀(xian)開(kai)，同時也會(hui)(hui)產(chan)生大量導(dao)電(dian)性氣體(ti)，此(ci)時正、負功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)會(hui)(hui)被導(dao)電(dian)性氣體(ti)導(dao)通而(er)出現拉弧燃燒(shao)的現象，為(wei)避免(mian)此(ci)類(lei)情況(kuang)的發(fa)生，本(ben)實用(yong)新(xin)型在(zai)(zai)不改變(bian)功(gong)(gong)(gong)(gong)率(lv)(lv)模(mo)塊外觀(guan)結構的前提(ti)下，利用(yong)絕(jue)緣(yuan)防護罩6覆蓋在(zai)(zai)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)連(lian)(lian)(lian)(lian)(lian)接(jie)部(bu)(bu)(bu)和(he)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)邦(bang)定線(xian)(xian)(xian)7的上(shang)方，將(jiang)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)連(lian)(lian)(lian)(lian)(lian)接(jie)部(bu)(bu)(bu)以(yi)及功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)邦(bang)定線(xian)(xian)(xian)7均與(yu)功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2隔開(kai)，此(ci)處也可(ke)以(yi)不使用(yong)邦(bang)定線(xian)(xian)(xian)7而(er)采用(yong)超聲波金屬焊(han)接(jie)的方式進行(xing)連(lian)(lian)(lian)(lian)(lian)接(jie)，則絕(jue)緣(yuan)防護罩6覆蓋在(zai)(zai)功(gong)(gong)(gong)(gong)率(lv)(lv)端(duan)(duan)(duan)子(zi)(zi)引(yin)伸出的焊(han)腳的上(shang)方，將(jiang)焊(han)腳與(yu)功(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片(pian)(pian)2隔開(kai)，本(ben)實用(yong)新(xin)型中所述覆蓋僅表(biao)明(ming)兩者的上(shang)下位置關系(xi)，但(dan)兩者之(zhi)間(jian)留有(you)空(kong)隙，不直接(jie)接(jie)觸。

本實(shi)施(shi)例中(zhong)功(gong)(gong)(gong)率(lv)端(duan)子(zi)有(you)三組(zu)(zu)(zu)，每組(zu)(zu)(zu)功(gong)(gong)(gong)率(lv)端(duan)子(zi)包括一(yi)(yi)(yi)個(ge)正極功(gong)(gong)(gong)率(lv)端(duan)子(zi)4和一(yi)(yi)(yi)個(ge)負(fu)極功(gong)(gong)(gong)率(lv)端(duan)子(zi)3，每組(zu)(zu)(zu)功(gong)(gong)(gong)率(lv)端(duan)子(zi)的(de)上(shang)(shang)方(fang)均設(she)有(you)一(yi)(yi)(yi)個(ge)絕(jue)緣(yuan)(yuan)防(fang)護(hu)罩(zhao)6，位(wei)于(yu)(yu)中(zhong)間(jian)位(wei)置(zhi)(zhi)的(de)一(yi)(yi)(yi)個(ge)絕(jue)緣(yuan)(yuan)防(fang)護(hu)罩(zhao)6的(de)兩側(ce)(ce)(ce)均設(she)有(you)側(ce)(ce)(ce)擋板(ban)9。絕(jue)緣(yuan)(yuan)防(fang)護(hu)罩(zhao)6的(de)外側(ce)(ce)(ce)和/或內(nei)側(ce)(ce)(ce)設(she)有(you)加強筋(jin)8，增(zeng)加絕(jue)緣(yuan)(yuan)防(fang)護(hu)罩(zhao)6的(de)強度，為了增(zeng)強絕(jue)緣(yuan)(yuan)效(xiao)果，絕(jue)緣(yuan)(yuan)防(fang)護(hu)罩(zhao)6的(de)內(nei)部在正極功(gong)(gong)(gong)率(lv)端(duan)子(zi)4與負(fu)極功(gong)(gong)(gong)率(lv)端(duan)子(zi)3交界處的(de)上(shang)(shang)方(fang)對應位(wei)置(zhi)(zhi)可(ke)設(she)置(zhi)(zhi)隔(ge)(ge)板(ban)12，本實(shi)施(shi)例中(zhong)的(de)絕(jue)緣(yuan)(yuan)防(fang)護(hu)罩(zhao)6在中(zhong)間(jian)一(yi)(yi)(yi)組(zu)(zu)(zu)功(gong)(gong)(gong)率(lv)端(duan)子(zi)上(shang)(shang)這樣設(she)置(zhi)(zhi)，而位(wei)于(yu)(yu)兩側(ce)(ce)(ce)的(de)兩組(zu)(zu)(zu)功(gong)(gong)(gong)率(lv)端(duan)子(zi)不(bu)設(she)置(zhi)(zhi)隔(ge)(ge)板(ban)12，實(shi)際實(shi)施(shi)時也可(ke)以選擇多(duo)組(zu)(zu)(zu)功(gong)(gong)(gong)率(lv)端(duan)子(zi)全(quan)部都(dou)(dou)設(she)置(zhi)(zhi)隔(ge)(ge)板(ban)12或者(zhe)全(quan)部都(dou)(dou)不(bu)設(she)置(zhi)(zhi)。

絕(jue)緣防(fang)(fang)護(hu)罩(zhao)6根據功率模塊或使用的(de)位(wei)置不(bu)同，其大小和形狀可以(yi)適當(dang)進行調整(zheng)，為便于安裝及(ji)增(zeng)加安裝牢固程度，本實施例中(zhong)的(de)絕(jue)緣防(fang)(fang)護(hu)罩(zhao)6設(she)有(you)限(xian)位(wei)結構10，絕(jue)緣防(fang)(fang)護(hu)罩(zhao)6的(de)結構還需要考慮邦(bang)(bang)定線7的(de)位(wei)置及(ji)形狀，絕(jue)緣防(fang)(fang)護(hu)罩(zhao)6不(bu)允許碰到邦(bang)(bang)定線7，以(yi)免塌線或影響焊點的(de)壽命(ming)。

如圖2所(suo)示，所(suo)述(shu)功(gong)(gong)率模塊封裝過程中(zhong)，在填充硅凝膠(jiao)之前，將(jiang)絕緣防護(hu)罩6逐(zhu)一安(an)裝在功(gong)(gong)率模塊內(nei)部，功(gong)(gong)率端(duan)子上方的(de)殼體(ti)1開設有與(yu)(yu)限(xian)位(wei)(wei)結(jie)構10相適配(pei)的(de)槽11，絕緣防護(hu)罩6與(yu)(yu)殼體(ti)1通過限(xian)位(wei)(wei)結(jie)構10與(yu)(yu)槽11進(jin)行裝配(pei)，槽11的(de)形(xing)狀可(ke)根據需要(yao)自行選擇，也可(ke)以不使用(yong)槽11而采用(yong)其他(ta)方式(shi)連接(jie)固定(ding)如粘(zhan)接(jie)、焊接(jie)、設置螺釘等(deng)，本實施例中(zhong)采用(yong)燕(yan)(yan)尾槽11進(jin)行榫接(jie)，安(an)裝時(shi)將(jiang)限(xian)位(wei)(wei)結(jie)構10插入殼體(ti)1預留的(de)燕(yan)(yan)尾槽11內(nei)部，實現絕緣防護(hu)罩6與(yu)(yu)外殼的(de)可(ke)靠連接(jie)。

如圖(tu)3a和(he)3b所示(shi)，絕緣防護罩6包括互相(xiang)垂(chui)直的(de)單獨前擋板(ban)621和(he)單獨頂擋板(ban)622，所述單獨頂擋板(ban)622與絕緣基板(ban)5平(ping)行，本(ben)實施例(li)中單獨頂擋板(ban)622與功率端(duan)子連接(jie)部上方的(de)殼體1相(xiang)連；單獨前擋板(ban)621與絕緣基板(ban)5相(xiang)接(jie)觸，用(yong)于支撐，也(ye)可以不(bu)接(jie)觸。絕緣防護罩6的(de)材料為工程塑料，本(ben)實施例(li)中選用(yong)PBT或PPS。

實(shi)(shi)施例2：如圖(tu)4、圖(tu)5所示(shi)，本實(shi)(shi)施例與實(shi)(shi)施例1的(de)結構基本相同，不同之處在于，本實(shi)(shi)施例中的(de)絕緣防護(hu)罩6自功率端子(zi)連接部的(de)上(shang)方呈弧形(xing)延伸(shen)至(zhi)絕緣基板5處，如圖(tu)6a和圖(tu)6b所示(shi)。

實(shi)施(shi)(shi)例3：如(ru)圖(tu)7、圖(tu)8所(suo)示，本實(shi)施(shi)(shi)例與(yu)(yu)實(shi)施(shi)(shi)例1的(de)結構(gou)基本相同，不(bu)同之處在于，本實(shi)施(shi)(shi)例中的(de)所(suo)有功率(lv)端子(zi)共(gong)用一個絕緣防(fang)護罩(zhao)6，如(ru)圖(tu)9a和9b所(suo)示，絕緣防(fang)護罩(zhao)6包括(kuo)互(hu)相垂直(zhi)(zhi)的(de)共(gong)用前擋(dang)板(ban)611和共(gong)用頂(ding)擋(dang)板(ban)612，共(gong)用前擋(dang)板(ban)611與(yu)(yu)絕緣基板(ban)5垂直(zhi)(zhi)，共(gong)用頂(ding)擋(dang)板(ban)612自(zi)共(gong)用前擋(dang)板(ban)611的(de)頂(ding)邊向(xiang)外(wai)延(yan)伸(shen)并罩(zhao)在功率(lv)端子(zi)連接部的(de)上方(fang)，此(ci)處“向(xiang)外(wai)”意為(wei)向(xiang)正(zheng)電極(ji)和負(fu)電極(ji)的(de)方(fang)向(xiang)上延(yan)伸(shen)，本實(shi)施(shi)(shi)例中延(yan)伸(shen)的(de)形(xing)狀為(wei)平面，也(ye)可以延(yan)伸(shen)為(wei)弧形(xing)，本領(ling)域技術人員也(ye)可根據需要自(zi)行設置。前擋(dang)板(ban)與(yu)(yu)頂(ding)擋(dang)板(ban)相接的(de)直(zhi)(zhi)角邊緣向(xiang)內(nei)凹陷(xian)有防(fang)撞(zhuang)槽11，原因是此(ci)處塑料較(jiao)厚，因此(ci)去(qu)(qu)掉(diao)(diao)一部分，也(ye)可不(bu)去(qu)(qu)掉(diao)(diao)。

在本(ben)(ben)(ben)實(shi)用(yong)新(xin)型(xing)(xing)的描(miao)述中，需要理解(jie)的是(shi)(shi)，術語“向外(wai)”、“垂直”、“上”、“下”、“頂部(bu)”等指示(shi)的方(fang)(fang)位或(huo)位置關(guan)系(xi)為基于(yu)附(fu)圖所(suo)示(shi)的方(fang)(fang)位或(huo)位置關(guan)系(xi)，僅(jin)是(shi)(shi)為了(le)便于(yu)描(miao)述本(ben)(ben)(ben)實(shi)用(yong)新(xin)型(xing)(xing)和(he)簡化描(miao)述，而不是(shi)(shi)指示(shi)或(huo)暗示(shi)所(suo)指的設備或(huo)元(yuan)件必須具(ju)有特(te)定的方(fang)(fang)位、以(yi)特(te)定的方(fang)(fang)位構(gou)造和(he)操作，因此不能(neng)理解(jie)為對(dui)本(ben)(ben)(ben)實(shi)用(yong)新(xin)型(xing)(xing)的限(xian)制。以(yi)上僅(jin)是(shi)(shi)本(ben)(ben)(ben)實(shi)用(yong)新(xin)型(xing)(xing)的優選實(shi)施方(fang)(fang)式(shi)，對(dui)于(yu)本(ben)(ben)(ben)技(ji)術領域(yu)的普(pu)通技(ji)術人(ren)員(yuan)來(lai)說，在不脫離本(ben)(ben)(ben)實(shi)用(yong)新(xin)型(xing)(xing)原理的前提下，還可以(yi)做出若干改進和(he)潤(run)飾，這(zhe)些改進和(he)潤(run)飾也應視為本(ben)(ben)(ben)實(shi)用(yong)新(xin)型(xing)(xing)的保(bao)護范(fan)圍。