A temperature detection circuit, a pull-up resistor fault detection method thereof and a vehicle
By designing an adjustable pull-up resistor module and calculating the voltage value, the problems of low detection accuracy and poor adaptability of NTC temperature detection circuits were solved, achieving high-precision and flexible temperature detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing NTC temperature detection circuits suffer from low detection accuracy, poor adaptability, and inconvenient calibration because they cannot adapt to the nonlinearity and wide range of resistance changes of thermistors.
A temperature detection circuit including a thermistor and a pull-up resistor module is adopted. Through series and parallel circuit design, the connection state of different resistors is controlled by a switch to achieve adjustable resistance value, which can adapt to thermistors with different characteristics and application scenarios. The actual and theoretical resistance value range of the resistor is determined by voltage value calculation, and dynamic calibration is performed.
It improves detection accuracy and versatility across the entire temperature range, enables dynamic calibration without physical replacement, and simplifies the production and field calibration process.
Smart Images
Figure CN122408985A_ABST