NTT DoCoMo開發出了能夠利用太陽能電池發電的手機充電器，并且在(zai)“CEATEC JAPAN 2009（圖(tu)1，圖(tu)2）。該充電器的(de)最大輸出電流約為300mA，在(zai)日(ri)照良好的(de)場所只需(xu)3～5小時(shi)即(ji)可充滿手機的(de)鋰離子充電電池。外形尺寸(cun)為114mm×146mm×15mm。

　　除太(tai)(tai)陽(yang)能電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)外，NTT DoCoMo還開(kai)發出了暫時儲(chu)存太(tai)(tai)陽(yang)能電(dian)(dian)(dian)(dian)(dian)池(chi)生(sheng)成電(dian)(dian)(dian)(dian)(dian)量的(de)(de)“輔(fu)(fu)(fu)助(zhu)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)(qi)”（圖3）。通過與(yu)太(tai)(tai)陽(yang)能電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)組合使用，白(bai)天(tian)太(tai)(tai)陽(yang)能電(dian)(dian)(dian)(dian)(dian)池(chi)產生(sheng)的(de)(de)電(dian)(dian)(dian)(dian)(dian)量可以(yi)存儲(chu)在輔(fu)(fu)(fu)助(zhu)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)(qi)中(zhong)，在夜(ye)間通過輔(fu)(fu)(fu)助(zhu)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)(qi)為手機(ji)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。“完全無需(xu)插(cha)頭即可使用手機(ji)”（NTT DoCoMo解(jie)說員(yuan)）。輔(fu)(fu)(fu)助(zhu)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)(qi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)容量約為1800mAh，對于800mAh左右(you)的(de)(de)手機(ji)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)池(chi)，“可以(yi)充(chong)(chong)(chong)(chong)(chong)滿1次半左右(you)”（同(tong)上）。輔(fu)(fu)(fu)助(zhu)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)(qi)的(de)(de)外殼上標注有“Powered by eneloop”的(de)(de)字樣，由此可以(yi)推測，其(qi)內置充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)池(chi)應該是三(san)洋電(dian)(dian)(dian)(dian)(dian)機(ji)的(de)(de)eneloop品牌。

　　太(tai)陽能(neng)(neng)電(dian)(dian)池充(chong)電(dian)(dian)器采用美(mei)國SunPower太(tai)陽能(neng)(neng)電(dian)(dian)池單元并聯的結(jie)構(gou)。模塊為NTT電(dian)(dian)子制(zhi)造，組合了使用DC-DC轉換器的升壓電(dian)(dian)路，以及具備“MPPT（Maximum Power Point Tracking）”功能(neng)(neng)，能(neng)(neng)夠按照(zhao)日照(zhao)條(tiao)件控制(zhi)輸出功率(lv)達到最(zui)大(da)化的IC。借助這一(yi)結(jie)構(gou)，“即使部分單元位于陰(yin)影中，輸出功率(lv)也不會大(da)幅下降”（同上）。

圖1：NTT DoCoMo展出的太陽能電池充電器

圖2：太陽能電池充電器的概要

圖3：與太陽能電(dian)(dian)池(chi)充電(dian)(dian)器組合使用的輔(fu)助充電(dian)(dian)適配器