High-voltage auxiliary system and electronic control device

A high-voltage auxiliary system for a vehicle comprising:

• a high-voltage battery;
• a temperature raising device connected to the high-voltage battery via an electric circuit and configured to raise a temperature of the high-voltage battery by utilizing fluctuations in voltage and current;
• a high-voltage auxiliary machine electrically connected to the electric circuit, the high-voltage auxiliary machine including a drive circuit to control power supplied from the high-voltage battery and a high-voltage water heater driven by power supplied from the drive circuit;
• a battery temperature control device configured to control a temperature of the high-voltage battery, the battery temperature control device including a coolant circuit in which coolant circulates, the coolant being heated by the high-voltage water heater;
• and
• an electronic control device configured to:
• suppress an operating state of the high-voltage auxiliary machine so that a fluctuation in voltage and current due to operation of the temperature raising device and operation of the high-voltage auxiliary machine is smaller than an allowable value of the high-voltage auxiliary machine;
• acquire the fluctuation in voltage or current due to the operation of the temperature raising device and the operation of the high-voltage auxiliary machine;
• compare the fluctuation with the allowable value to determine whether the fluctuation is smaller than the allowable value;
• maintain an operating state of the high-voltage auxiliary machine when it is determined that the fluctuation is smaller than the allowable value;
• and
• restrict an operating state of the high-voltage auxiliary machine when it is determined that the fluctuation is larger than or equal to the allowable value, wherein
• the temperature of the high-voltage battery is raised by both a temperature rise caused by an operation of the temperature raising device and a temperature adjustment caused by the battery temperature control device.

An electronic control device for a high-voltage auxiliary system including:

• a high-voltage battery;
• a temperature raising device connected to the high-voltage battery via an electric circuit to raise a temperature of the high-voltage battery by utilizing fluctuations in voltage and current;
• a high-voltage auxiliary machine having an electric compressor electrically connected to the electric circuit and driven by power supplied from the high-voltage battery;
• and a battery temperature control device including a refrigeration cycle device driven by an operation of the electric compressor to control a temperature of the high-voltage battery, wherein the temperature of the high-voltage battery is raised by both a temperature rise caused by an operation of the temperature raising device and a temperature adjustment caused by the battery temperature control device, wherein
• the electronic control device includes a processor and a memory configured to:
• suppress an operating state of the high-voltage auxiliary machine so that a fluctuation in voltage and current due to operation of the temperature raising device and operation of the high-voltage auxiliary machine is smaller than an allowable value of the high-voltage auxiliary machine;
• acquire the fluctuation in voltage or current due to the operation of the temperature raising device and the operation of the high-voltage auxiliary machine;
• compare the fluctuation with the allowable value to determine whether the fluctuation is smaller than the allowable value;
• maintain an operating state of the high-voltage auxiliary machine when it is determined that the fluctuation is smaller than the allowable value;
• and
• restrict an operating state of the high-voltage auxiliary machine when it is determined that the fluctuation is larger than or equal to the allowable value.

An electronic control device for a high-voltage auxiliary system including:

• a high-voltage battery;
• a temperature raising device connected to the high-voltage battery via an electric circuit and configured to raise a temperature of the high-voltage battery by utilizing fluctuations in voltage and current;
• a high-voltage auxiliary machine electrically connected to the electric circuit, the high-voltage auxiliary machine including a drive circuit to control power supplied from the high-voltage battery and a high-voltage water heater driven by power supplied from the drive circuit;
• and a battery temperature control device configured to control a temperature of the high-voltage battery, the battery temperature control device including a coolant circuit in which coolant circulates, the coolant being heated by the high-voltage water heater, wherein the temperature of the high-voltage battery is raised by both a temperature rise caused by an operation of the temperature raising device and a temperature adjustment caused by the battery temperature control device, wherein
• the electronic control device includes a processor and a memory configured to:
• suppress an operating state of the high-voltage auxiliary machine so that a fluctuation in voltage and current due to operation of the temperature raising device and operation of the high-voltage auxiliary machine is smaller than an allowable value of the high-voltage auxiliary machine;
• acquire the fluctuation in voltage or current due to the operation of the temperature raising device and the operation of the high-voltage auxiliary machine;
• compare the fluctuation with the allowable value to determine whether the fluctuation is smaller than the allowable value;
• maintain an operating state of the high-voltage auxiliary machine when it is determined that the fluctuation is smaller than the allowable value;
• and
• restrict an operating state of the high-voltage auxiliary machine when it is determined that the fluctuation is larger than or equal to the allowable value.