自控溫電(dian)熱帶采(cai)用(yong)功能性復(fu)合高(gao)(gao)分(fen)子(zi)導(dao)電(dian)材(cai)料，可(ke)以感知溫度變化(hua)而(er)改變自身形態，從而(er)達到控溫目的。在(zai)(zai)兩根平行的金屬(shu)線(xian)間均勻地擠塑導(dao)電(dian)高(gao)(gao)分(fen)子(zi)復(fu)合材(cai)料，在(zai)(zai)外護套(tao)上再(zai)包(bao)一層(ceng)絕緣護套(tao)。

　　電伴熱帶在自控溫上的原理表現：
　　電(dian)(dian)(dian)(dian)伴(ban)熱帶接通(tong)，把其他形式的能(neng)轉換成電(dian)(dian)(dian)(dian)能(neng)的裝置(zhi)叫做電(dian)(dian)(dian)(dian)源由一根(gen)導(dao)(dao)線經過導(dao)(dao)電(dian)(dian)(dian)(dian)高分子材(cai)料到(dao)另一根(gen)導(dao)(dao)線形成回路，使材(cai)料升溫。隨著溫度升至某值(zhi)后，聚合結晶(jing)物(wu)體積膨脹，導(dao)(dao)電(dian)(dian)(dian)(dian)粒子之間的距(ju)離增(zeng)(zeng)大，造成電(dian)(dian)(dian)(dian)阻(zu)迅速增(zeng)(zeng)大至幾(ji)乎阻(zu)斷電(dian)(dian)(dian)(dian)流(liu)的程度，其溫度不再升高，這種現象稱(cheng)為正電(dian)(dian)(dian)(dian)阻(zu)的溫度系(xi)數">溫度系(xi)數的ＰＴＣ效應(ying)，能(neng)根(gen)據(ju)環(huan)境溫度輸出功率。