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回收廢舊磷酸鐵鋰電池的意義

2022-09-02

磷酸鐵鋰電池

由于磷酸鐵鋰電池具有比能量高、循環(huán)壽命長、安全性能好等優(yōu)點,因此廣泛應(yīng)用于各種電動汽車,而磷酸鐵鋰電池的平均使用壽命為3年左右,這意味著每年都有大量的廢舊磷酸鐵鋰電池。

將廢電池拆解后可得到金屬外殼、鋁箔、銅箔和塑料隔膜。金屬外殼和塑料膜片被均勻回收和專業(yè)加工,鋁箔和銅箔被不同方式回收利用。

同時,在對廢舊磷酸鐵鋰電池電極進(jìn)行處理之前,應(yīng)根據(jù)其內(nèi)部組成特點進(jìn)行相應(yīng)的預(yù)處理,主要包括放電電池剩余電量、拆除電池、粉碎金屬外殼等。

在放電處理中,不同種類的電池采用不同的處理方法,功率較小的小型電池可采用浸入電解液短路的方法使電池失活。而對于動力電池這樣大的電池,由于其剩余電量可能比較大,通常采用放電設(shè)備放電處理,等起電量耗盡再拆解電池。

目前,廢舊磷酸鐵鋰電池的回收研究主要集中在正極上,需要在收到磷酸鐵鋰粉末前進(jìn)行前期處理,一般采用有機(jī)溶劑溶解粘結(jié)劑、高溫?zé)Y(jié)的方法,將電極上的鋁箔活性物質(zhì)磷酸鐵鋰溶解,然后再進(jìn)行后續(xù)收集。常用的回收技術(shù)大致可分為濕法回收、火法回收和生物浸出回收。


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