| 摘要 |
A diagnosis method of an intelligent power switch thermal sensor is provided to facilitate implementation by correcting software of a micro control unit of an intelligent power switch application module and to prevent reduction of a lifetime due to thermal damage. A diagnosis method of an intelligent power switch thermal sensor includes the steps of: inputting a lamp control order, starting control of an intelligent power switch, and measuring an output voltage of a battery and an output current of the intelligent power switch from analog to digital; calculating power consumption and temperature of the intelligent power switch and measuring a temperature of the intelligent power switch; firstly determining whether an error of the calculation value and the measured value is small; determining that the intelligent power switch thermal sensor is normal when the error is small and setting the temperature of the intelligent power system as the measured value; secondly determining whether the temperature of the intelligent power switch is higher than a reference value; and outputting intelligent power switch temperature warning, limiting and blocking a load current except a main load, and storing failure information when the temperature of the intelligent power switch is higher than the reference value.
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