解决如果有最小容量，会导致最小容量越来越大

Signed-off-by: huhui <huhui@sharkgulf.com>

Application/app/sox/soc.c

@@ -548,7 +548,7 @@ void soc_update(void){
 		_soc.charger_coulomb = 0;//clear charing
 		_soc.total_coulomb += _soc.pre_charger_coulomb / 3600.0f;
 		chargering = 1;
-		start_charger_coulomb = _soc.coulomb_now - _soc.coulomb_min;
+		start_charger_coulomb = _soc.coulomb_now;
 #if LEAST_SQUARE==1		
 		start_least_square(0);
 #endif