System and method for diagnosing battery connection status

A system for diagnosing a battery connection status, comprising:

• a DC-DC converter configured to convert and output a level of an input voltage;
• a battery configured to be connected to an output terminal of the DC-DC converter;
• and
• a controller configured to generate a control value for compensating for an error between a voltage command or a current command of the battery and a detection voltage or a detection current of the battery, control the output of the DC-DC converter by applying the control value, and diagnose an electrical connection status between the DC-DC converter and the battery based on a change in error between the detection voltage or the detection current of the battery and the voltage command or the current command of the battery,
• wherein the controller includes:
• a battery manager configured to monitor the detection voltage or the detection current of the battery;
• and
• a DC-DC conversion controller configured to receive the detection voltage or the detection current from the battery manager, generate the control value for compensating for the error between the voltage command or the current command of the battery and the detection voltage or the detection current of the battery, control the output of the DC-DC converter by applying the control value, and diagnose the connection status between the DC-DC converter and the battery based on a change in error between the detection voltage or the detection current of the battery and the voltage command or the current command of the battery, and
• wherein the DC-DC conversion controller includes:
• a first error compensation controller configured to generate the control value for compensating for the error between the voltage command or the current command of the battery and the detection voltage or the detection current of the battery;
• and
• a second error compensation controller configured to control an operation of the DC-DC converter to compensate for an error between a summed value obtained by summing the control value generated from the first error compensation controller and the voltage command of the DC-DC converter and an output voltage detection value of the DC-DC converter.