Temperature sampling correction circuit, temperature sampling device and vehicle
A technology for correcting circuits and sampling devices, applied in the field of vehicles, temperature sampling and correcting circuits, and temperature sampling devices, can solve the problems of difficult control, high circuit cost, and low sampling accuracy, and achieve reduced control difficulty, simple circuits, and reduced The effect of circuit cost
Active Publication Date: 2022-01-07
河北长征汽车制造有限公司
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Problems solved by technology
The temperature sampling circuits of the above-mentioned multiple methods have the problems of low sampling accuracy in the full temperature sampling range, difficult control and high circuit cost
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[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0027] The following describes the temperature sampling correction circuit of the embodiment of the present invention with reference to the accompanying drawings.
[0028] figure 1 It is a schematic block diagram of a temperature sampling correction circuit according to an embodiment of the present invention. refer to figure 1 As shown, the temperature sampling correction circuit includes: a voltage division unit 110 , a voltage division correction unit 120 , an amplification correction unit 130 and an operational amplification...
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The invention discloses a temperature sampling correction circuit, a temperature sampling device and a vehicle. The temperature sampling correction circuit comprises a voltage dividing unit, a voltage dividing correction unit, an amplification correction unit and an operation amplification unit, wherein the voltage dividing unit comprises a thermistor, and the voltage dividing unit is used for dividing voltage on the thermistor and outputting divided voltage; the voltage dividing correction unit is used for correcting the partial voltage according to the temperature change sensed by the thermistor and outputting correction voltage; the amplification correction unit is used for determining an output amplification coefficient of the amplification correction unit according to the correction voltage; and the operation amplification unit is used for amplifying the correction voltage according to the output amplification coefficient and outputting a temperature sampling voltage. According to the correction circuit, the accuracy of temperature detection in a full temperature sampling range is improved, a control chip does not need to participate in temperature sampling control, the circuit is simple, and the cost is relatively low.
Description
technical field [0001] The invention relates to the technical field of temperature detection, in particular to a temperature sampling correction circuit, a temperature sampling device and a vehicle. Background technique [0002] In electric vehicles, in order to protect the motor, battery and other components, and prevent the motor and battery from overheating and uncontrollable damage, temperature monitoring is usually required. When the motor is overheated, reduce the output power of the motor and increase the cooling flow to prevent the motor from further heating and cause damage to the motor, prevent the vehicle from losing power, and ensure the safety of the people on board. [0003] In related technologies, the temperature is sampled by connecting a thermistor in series with a resistor, or sampling temperature by setting a programmable operational amplifier on a control chip to amplify the output voltage, or sampling temperature by setting a switch switching circuit on...
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IPC IPC(8): G01K7/25
CPCG01K7/25
Inventor 林广镇陈小江唐子威
Owner 河北长征汽车制造有限公司