diff --git a/libraries/AP_BattMonitor/AP_BattMonitor_Backend.cpp b/libraries/AP_BattMonitor/AP_BattMonitor_Backend.cpp
index 7fd090bd6d..43c1b240c5 100644
--- a/libraries/AP_BattMonitor/AP_BattMonitor_Backend.cpp
+++ b/libraries/AP_BattMonitor/AP_BattMonitor_Backend.cpp
@@ -169,9 +169,9 @@ bool AP_BattMonitor_Backend::arming_checks(char * buffer, size_t buflen) const
     bool fs_voltage_inversion = is_positive(_params._critical_voltage) &&
                                 is_positive(_params._low_voltage) &&
                                 (_params._low_voltage < _params._critical_voltage);
-   uint8_t cell_min_index;
-   uint8_t  cell_max_index;
-   uint16_t  dropout_voltage;
+   uint8_t cell_min_index=0;
+   uint8_t  cell_max_index=0;
+   uint16_t  dropout_voltage=0;
     bool fs_cells_dropout_voltage = cells_dropout_voltage_checks(cell_min_index,cell_max_index,dropout_voltage);
 
     bool result = update_check(buflen, buffer, low_voltage,  "low voltage failsafe");
@@ -182,9 +182,17 @@ bool AP_BattMonitor_Backend::arming_checks(char * buffer, size_t buflen) const
     result = result && update_check(buflen, buffer, below_arming_capacity, "below minimum arming capacity");
     result = result && update_check(buflen, buffer, fs_capacity_inversion, "capacity failsafe critical > low");
     result = result && update_check(buflen, buffer, fs_voltage_inversion, "voltage failsafe critical > low");
-   // char bat_message[60];
-  //   snprintf(bat_message,60,"电池压差过大,%d号与%d号电芯，压差 %f V",cell_max_index,cell_min_index,dropout_voltage/1000.0);
-    result = result && update_check(buflen, buffer, fs_cells_dropout_voltage,"电池压差过大");
+
+    // char bat_message[60];
+    //   snprintf(bat_message,60,"电池压差过大,%d号与%d号电芯，压差 %f V",cell_max_index,cell_min_index,dropout_voltage/1000.0);
+    if (dropout_voltage == 0xeeee)
+    {
+        result = result && update_check(buflen, buffer, fs_cells_dropout_voltage, "电池电芯可能异常");
+    }
+    else
+    {
+        result = result && update_check(buflen, buffer, fs_cells_dropout_voltage, "电池压差过大");
+    }
     return result;
 }
 
@@ -262,7 +270,7 @@ bool AP_BattMonitor_Backend::cells_dropout_voltage_checks(uint8_t &cell_min_inde
         uint16_t cell_max = 0;
         for (int k = 0; k < MAVLINK_MSG_BATTERY_STATUS_FIELD_VOLTAGES_LEN; k++)
         {           
-            if ((_state.cell_voltages.cells[k]!=65535) && _state.cell_voltages.cells[k] != 0)  //TODO  if valid cell valtage  =0
+            if ((_state.cell_voltages.cells[k]!=65535))  //TODO  if valid cell valtage  =0
             {
                 if (_state.cell_voltages.cells[k] < cell_min)
                 {
@@ -282,6 +290,10 @@ bool AP_BattMonitor_Backend::cells_dropout_voltage_checks(uint8_t &cell_min_inde
         {
             return true;
         }
+        if(cell_max ==0&&cell_min==0){
+            dropout_voltage= 0xeeee;  //
+            return true;
+        }
     }
     return false;
 }