樹莓派鋰電源擴展板 雙USB輸出 Pi3獨立外場供電移動電源模組

商品說明 Raspberry Pi 樹莓派鋰電池擴展板：3800mAh 高容量 | 雙 USB 輸出 | 9小時長效續航 專為樹莓派打造的鋰電池 行動電源，能讓樹莓派主板最大獨立運作 長達9小時。當然，我也不限於用到樹莓派上，我板載2個USB-A接口，1個可以為Pi主板供電。如有需要的話，另一個可以為嵌入式液晶螢幕等設備供電。我的內部集成一顆進口鋰電池充電/升壓管理晶片。帶上自身的電池，重量僅僅80g。嚴格按照國際樹莓派HAT 擴展板尺寸進行研發，用簡單的銅柱即可和樹莓派主板進行層疊安裝。 【性能參數：】 電池容量：3800mAH 最大放電電流： 1.4A 空載輸出電壓： 5.1V ±0.1V 標準充電電流/電壓： 1.0A@5.0V 鋰電池充滿截至電壓： 4.18V – 4.2V CHG LED作用： 點亮： 充電器進行恆流充電。 熄滅： 充電器進行浮充，直到鋰電充滿截至。 ON LED作用： 點亮： USB-A接口向外輸出5V 熄滅： USB-A接口無電壓輸出。 Lithium Battery Expansion Board for Raspberry Pi Features Battery capacity: 3800mAh Maximum output current: 1.8A Output voltage: 5.1V ± 0.1V Standard charging current / voltage: 1.0A/5.0V It’s convenient to power on / off raspberry pi via battery swith; It can last about 9 hours if only pi 3. The Lithium battery expansion board can be also used on cellphone. Note: You can still charge this battery even if the switch is turn off; Working principle The working PMU (Power Manage Unit)can be only worked for charging mode or step-up mode at the same time. If the USB-A interface without any external load (like Pi), with 5V input voltage of MicroUSB, then the PMU enter charging mode. The PMU will integrate a current-limiting resistor with the external voltage, 5V voltage for Lithium battery, around 4.6V-4.7V voltage for USB-A interface.(The “ON” LED lights ) The PMU would enter step-up mode without external 5V voltage. Under this circumstance, turn on the switch, USB-A interface can output maxmum 5V voltage, two USB-A interface can maxmum output 1.8A current. The PMU itself has current-limiting protection. it will be short circuit when over 1.9A current.