NTT DoCoMo開發出了能夠利用太陽能電池發電的手機充電器，并(bing)且在“CEATEC JAPAN 2009（圖1，圖2）。該充(chong)電(dian)(dian)(dian)器的最(zui)大輸(shu)出電(dian)(dian)(dian)流約為300mA，在日(ri)照(zhao)良好的場所只需3～5小時(shi)即可(ke)充(chong)滿手機的鋰離子充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)池。外形尺(chi)寸為114mm×146mm×15mm。

　　除太陽能電(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)外(wai)，NTT DoCoMo還(huan)開發出了暫時儲存太陽能電(dian)(dian)(dian)(dian)(dian)池生(sheng)成(cheng)電(dian)(dian)(dian)(dian)(dian)量(liang)的(de)“輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)(shi)(shi)配(pei)器(qi)(qi)(qi)”（圖3）。通過(guo)與太陽能電(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)組合(he)使(shi)用，白天太陽能電(dian)(dian)(dian)(dian)(dian)池產生(sheng)的(de)電(dian)(dian)(dian)(dian)(dian)量(liang)可(ke)以(yi)存儲在輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)(shi)(shi)配(pei)器(qi)(qi)(qi)中，在夜間通過(guo)輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)(shi)(shi)配(pei)器(qi)(qi)(qi)為手機(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。“完全無需(xu)插(cha)頭即可(ke)使(shi)用手機(ji)(ji)”（NTT DoCoMo解說員）。輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)(shi)(shi)配(pei)器(qi)(qi)(qi)的(de)電(dian)(dian)(dian)(dian)(dian)流容量(liang)約(yue)為1800mAh，對于(yu)800mAh左右的(de)手機(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)池，“可(ke)以(yi)充(chong)(chong)滿1次半(ban)左右”（同上）。輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)(shi)(shi)配(pei)器(qi)(qi)(qi)的(de)外(wai)殼上標注(zhu)有“Powered by eneloop”的(de)字(zi)樣，由此(ci)可(ke)以(yi)推(tui)測，其內(nei)置充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)池應該是三洋電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的(de)eneloop品牌(pai)。

　　太陽(yang)(yang)能(neng)電池充電器采用美國SunPower太陽(yang)(yang)能(neng)電池單(dan)元并(bing)聯的結構(gou)。模(mo)塊為NTT電子(zi)制造(zao)，組合了使(shi)用DC-DC轉換器的升壓(ya)電路，以及具備“MPPT（Maximum Power Point Tracking）”功(gong)能(neng)，能(neng)夠按(an)照日照條件控(kong)制輸出功(gong)率達到(dao)最(zui)大化的IC。借助這一結構(gou)，“即(ji)使(shi)部分單(dan)元位(wei)于陰影中，輸出功(gong)率也不會(hui)大幅下降”（同上）。

圖1：NTT DoCoMo展出的太陽能電池充電器

圖2：太陽能電(dian)池充(chong)電(dian)器的概要

圖3：與太(tai)陽能電池充電器組合使用的輔助充電適配(pei)器