diff --git a/MainCode/adalm1000_logger.py b/MainCode/adalm1000_logger.py
index a84acf0..f81337c 100644
--- a/MainCode/adalm1000_logger.py
+++ b/MainCode/adalm1000_logger.py
@@ -266,6 +266,8 @@ class BatteryTester(QMainWindow):
         self.plot_mutex = threading.Lock()
         super().__init__()
 
+        self.last_logged_phase = None
+
         # Color scheme
         self.bg_color = "#2E3440"
         self.fg_color = "#D8DEE9"
@@ -708,6 +710,13 @@ class BatteryTester(QMainWindow):
                     ])
                     self.current_cycle_file.flush()
                     self._last_log_time = now
+            # Zyklusbeginn erkennen: Wechsel von Resting → Charge
+            if self.test_running:
+                phase = self.test_phase
+                if (phase == "Charge" and self.last_logged_phase != "Charge"):
+                    self.create_cycle_log_file()  # Neue Datei für neuen Zyklus
+                self.last_logged_phase = phase
+
 
     def start_test(self):
         """Start the full battery test cycle"""