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  • 多節鎳氫電池充電管理板規格書
  • 概 述

    深圳華太電子有限公司鎳氫充電管理板采用高度智能化的MCU方案,充電、保護性能出眾,安全特性好,產品性能高度一致。



    MCU自帶12bitADC,轉換精度高,可精確檢測負電壓(-deltaV),充飽容量準確控制在95%-105%范圍內

    采用負電壓(-deltaV),零電壓(0deltaV),最大電壓(Vmax),溫度(Tmax),最大溫升(Total deltaT),溫升率(deltaT)等多種判斷條件,在高度安全的條件下保證電池完全充飽

    先進的保護線路對電池進行過流、短路、欠壓等全方位保護

    對低電壓電池具有小電流喚醒功能

    開始充電時采用電流緩慢上升(ramp up)的方法,增加電池容量和循環壽命

    獨特的測試模式,確保100%的生產成功率


    功能描述

    上電復位后,CPU會查詢電池是否存在。方法是:先加很少的占空比(M/B)的PWM,然后逐步檢測是否有充電電流(大于最大充電電流的1/8即判定為有電流),如果有則進入充電階段;如果沒有充電電流,則進一步檢測電池是否為過壓保護。方法是:放電(CPU的5腳輸出一個100ms的高電平脈沖)然后測試電池電壓,如果有電池,則會有電壓存在,否則電壓會下降到0.5V以下。
    充電開始時,對NiMH電池將會判斷電池是否已經充飽,如果充飽度>80%則停止充電,以防充壞電池。

    充電過程中MCU會不斷檢測電池是否短路,如果短路,則停止充電,同時紅燈閃爍告警。
    判斷截止的方法:(各條件為或的關系)
    NiMH電池:
    1.過溫 58℃
    2. 溫升 18℃
    3. –deltaV -3.3mV/cell
    4 0deltaV 32分鐘
    5 最大電壓 1.56V/cell
    6 最大時間 5小時
    充飽后,如果NiMH電池電壓小于1.23V/cell則CPU會重新啟動充電。當然如果是溫度超過60℃,充電時間超過最大時間者,將不重新啟動。

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