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充電樁功能類似于加油站里面的加油機，可以固定在地面或墻壁，安裝于公共建筑（公共樓宇、商場、公共停車場等）和居民小區停車場或充電站內，可以根據不同的電壓等級為各種型號的電動汽車充電。充電樁的輸入端與交流電網直接連接，輸出端都裝有充電插頭用于為電動汽車充電。

充(chong)電(dian)(dian)(dian)(dian)(dian)樁(zhuang)目前(qian)分為交(jiao)流充(chong)電(dian)(dian)(dian)(dian)(dian)樁(zhuang)和直(zhi)流充(chong)電(dian)(dian)(dian)(dian)(dian)樁(zhuang)。交(jiao)流樁(zhuang)輸出(chu)單(dan)相/三相交(jiao)流電(dian)(dian)(dian)(dian)(dian)通過車載充(chong)電(dian)(dian)(dian)(dian)(dian)機轉(zhuan)換成直(zhi)流電(dian)(dian)(dian)(dian)(dian)給車載電(dian)(dian)(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)(dian)(dian)，功(gong)(gong)率一(yi)般(ban)較(jiao)(jiao)小（有(you) 7kW、22kW、40kW 等(deng)功(gong)(gong)率），充(chong)電(dian)(dian)(dian)(dian)(dian)速(su)(su)度一(yi)般(ban)較(jiao)(jiao)慢，故一(yi)般(ban)安(an)裝在(zai)小區停車場等(deng)地。直(zhi)流充(chong)電(dian)(dian)(dian)(dian)(dian)樁(zhuang)（或稱非(fei)車載充(chong)電(dian)(dian)(dian)(dian)(dian)機）則(ze)是直(zhi)接(jie)輸出(chu)直(zhi)流電(dian)(dian)(dian)(dian)(dian)給車載電(dian)(dian)(dian)(dian)(dian)池進(jin)行充(chong)電(dian)(dian)(dian)(dian)(dian)，功(gong)(gong)率較(jiao)(jiao)大（有(you) 60kW、120kW、200kW 甚至更高(gao)），充(chong)電(dian)(dian)(dian)(dian)(dian)速(su)(su)度較(jiao)(jiao)快(kuai)，故一(yi)般(ban)安(an)裝在(zai)高(gao)速(su)(su)公路旁的充(chong)電(dian)(dian)(dian)(dian)(dian)站。

電網中的交流電通過交流充電樁直接給車載充電器 (OBC) 供電，OBC 把 AC 轉換成 DC，然后通過配電箱為車內的動力電池充電。直流充電樁則包含許多 AC-DC 電源模塊。從目前充電樁市場的狀況來看，有 3 大趨勢：寬范圍的恒定功率、寬范圍的輸出電壓、更高功率的模塊。

兩個主要功率級。首先，功率因素校正 (PFC) 級，保持輸入電流和電壓之間的相位關系，最大限度地減少線路/電網電流的總諧波失真 (THD) 。這有助于減少任何浪費的無功功率，提高整體能效。

第二功率級是 DC-DC 轉換器，它從 PFC 級獲得 DC 輸出，并將其轉換為電池充電所需的電平。轉換器的輸出電壓和電流基于電池的整體健康狀態和充電狀態隨時間變化。

不論是功率因數校正（PFC）、原(yuan)邊側(ce) DC-DC、或(huo)二次整(zheng)流(liu)，捷捷微電(dian)都具有相應(ying)的解決方案(an)，汽(qi)車系列產品(pin)涵蓋二極管、MOSFET、TVS 等各(ge)類產品(pin)。比如：整(zheng)流(liu)＋LLC 構成了充電(dian)樁(zhuang)的基本電(dian)路，可采用 FRED（快(kuai)恢復二極管）方案(an)；CAN 通訊口的 ESD 保護。