Power supply device and overcurrent alarm method

An overcurrent alarm method for a power supply device, the power supply device providing power to a load system and comprising a current sampling module, a first comparison module and a control module electrically connected sequentially, the load system comprising a plurality of loads, wherein the method comprises:

• obtaining a current sampling value via the current sampling module;
• comparing the current sampling value with an alarm current reference value to obtain a first output value via the first comparison module, wherein the alarm current reference value is less than an overcurrent protection reference value;
• and
• determining whether to send a current alarm signal to the load system based on the first output value via the control module,
• wherein when the current sampling value is greater than or equal to the alarm current reference value, the control module sends the current alarm signal and provides a warning notification to the load system, after receiving the current alarm signal, the load system disconnects at least one of the loads;
• when the current sampling value is less than the alarm current reference value, the control module does not send the current alarm signal, or the control module sends a current non-alarm signal.