Patent ID: 8592671

Claim:
An auxiliary power supply unit of a data center comprising: a thermoelectric chip module comprising a plurality of thermoelectric chips, wherein at least one of sidewalls of each thermoelectric chip contacts a hot pipe of the data center, the thermoelectric chip generates a direct current (DC) voltage when a temperature difference between the sidewalls of each thermoelectric chip exist; a direct current/alternating current (DC/AC) voltage converter connected to the thermoelectric chip module to convert the DC voltage into an alternating current (DC) voltage to power an air treatment device of the data center; a current detector connected to the thermoelectric chip module to detect a current output from the thermoelectric chip module and output a current value; a rechargeable battery connected to a switching device of the data center and the DC/AC voltage convertor connected to the thermoelectric chip module through the switching device; a first switch connected between the thermoelectric chip module and the DC/AC voltage convertor; a second switch connected between the thermoelectric chip module and the rechargeable battery; and a controller connected to the current detector to receive the current value and compare the detected current value with a predetermined value to evaluate a load capacity of the thermoelectric chip module, and the controller further connected to the first switch and the second switch; wherein if the detected current value is greater than or equal to the predetermined value, the controller turns on the first switch and turns off the second switch, the thermoelectric chip module outputs the DC voltage to the DC/AC voltage converter to power the air treatment device through the switch device, if the detected current value is less than the predetermined current value, the controller turns on the second switch and turns off the first switch, the thermoelectric chip module charges the rechargeable battery, the rechargeable battery powers the air treatment device through the switch device.