WO2023098521A1 - 新能源车、车载充电装置、温度检测电路及温度检测方法 - Google Patents

新能源车、车载充电装置、温度检测电路及温度检测方法 Download PDF

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WO2023098521A1
WO2023098521A1 PCT/CN2022/133593 CN2022133593W WO2023098521A1 WO 2023098521 A1 WO2023098521 A1 WO 2023098521A1 CN 2022133593 W CN2022133593 W CN 2022133593W WO 2023098521 A1 WO2023098521 A1 WO 2023098521A1
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Prior art keywords
temperature
temperature signal
digital
new energy
filter
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PCT/CN2022/133593
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English (en)
French (fr)
Inventor
王超
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Changchun Jetty Automotive Parts Co Ltd
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Changchun Jetty Automotive Parts Co Ltd
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Priority to MX2024006592A priority Critical patent/MX2024006592A/es
Priority to US18/714,857 priority patent/US20250027820A1/en
Priority to EP22900326.4A priority patent/EP4443121B1/en
Publication of WO2023098521A1 publication Critical patent/WO2023098521A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/20—Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/005—Calibration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/007—Testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2219/00—Thermometers with dedicated analog to digital converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • This specification relates to the technical field of on-board charging devices for new energy vehicles, in particular to a new energy vehicle, on-board charging device, temperature detection circuit and temperature detection method.
  • the purpose of the embodiments of this specification is to provide a new energy vehicle, an on-board charging device, a temperature detection circuit and a temperature detection method, so as to improve the accuracy of charging temperature detection of the on-board charging device for new energy vehicles.
  • the embodiment of this specification provides a temperature detection circuit for an on-board charging device of a new energy vehicle, including:
  • the first temperature sensor is arranged at the positive connection terminal of the new energy vehicle on-board charging device, and is used to collect the first analog temperature signal of the positive connection terminal;
  • the second temperature sensor is arranged at the negative connection terminal of the new energy vehicle on-board charging device, and is used to collect the second analog temperature signal of the negative connection terminal;
  • the third temperature sensor is arranged in the housing of the new energy vehicle on-board charging device, and is used to collect the analog ambient temperature signal of the new energy vehicle on-board charging device;
  • An analog-to-digital conversion module configured to correspondingly convert the first analog temperature signal, the second analog temperature signal, and the analog ambient temperature signal into a first digital temperature signal, a second digital temperature signal, and Digital ambient temperature signal;
  • a micro control unit configured to correct the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal.
  • the analog-to-digital conversion module is integrated in the micro control unit.
  • the correction of the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal includes:
  • x 1 is the first digital temperature signal
  • x 2 is the second digital temperature signal
  • f(x 1 ) is the corrected first digital temperature signal
  • f(x 2 ) is the corrected second digital temperature signal
  • ⁇ is the time constant
  • a is the temperature compensation coefficient
  • k 1 and b 1 are the lower limit of the specified current respectively
  • k 2 and b 2 are respectively the slope and intercept of the straight line corresponding to the two temperature points when the temperature rises by one degree from the upper limit temperature under the specified current.
  • the temperature detection circuit further includes:
  • the first bias circuit is arranged on the line between the first temperature sensor and the analog-to-digital conversion module, and is used to set the common-mode voltage of the first temperature sensor to the specified value of the first temperature sensor voltage range, and detecting whether an open circuit fault occurs in the first temperature sensor;
  • the second bias circuit is arranged on the line between the second temperature sensor and the analog-to-digital conversion module, and is used to set the common-mode voltage of the second temperature sensor at the specified value of the second temperature sensor voltage range, and detect whether an open circuit fault occurs in the second temperature sensor.
  • the first bias circuit includes a first weak pull-up resistor and a first weak pull-down resistor
  • One end of the first weak pull-up resistor is connected to one end of the first temperature sensor, and the other end of the first weak pull-up resistor is connected to a DC power supply;
  • One end of the first weak pull-down resistor is connected to the other end of the first temperature sensor, and the other end of the first weak pull-down resistor is grounded.
  • the second bias circuit includes a second weak pull-up resistor and a second weak pull-down resistor
  • One end of the second weak pull-up resistor is connected to one end of the second temperature sensor, and the other end of the second weak pull-up resistor is connected to a DC power supply;
  • One end of the second weak pull-down resistor is connected to the other end of the second temperature sensor, and the other end of the second weak pull-down resistor is grounded.
  • the temperature detection circuit further includes:
  • a first passive filter arranged on the line between the first bias circuit and the analog-to-digital conversion module, for suppressing aliasing distortion and high-frequency noise in the first analog temperature signal;
  • the second passive filter is arranged on the line between the second bias circuit and the analog-to-digital conversion module, and is used for suppressing aliasing distortion and high-frequency noise in the second analog temperature signal.
  • the first passive filter includes a first first-order RC low-pass filter, a second first-order RC low-pass filter, and a first differential capacitor;
  • the first differential capacitor is connected between the output end of the first first-order RC low-pass filter and the output end of the second first-order RC low-pass filter; the first first-order RC low-pass The input end of the filter and the input end of the second first-order RC low-pass filter are connected with the output end of the first bias circuit.
  • the second passive filter includes a third first-order RC low-pass filter, a fourth first-order RC low-pass filter, and a second differential capacitor;
  • the second differential capacitor is connected between the output end of the third first-order RC low-pass filter and the output end of the fourth first-order RC low-pass filter; the third first-order RC low-pass filter The input end of the filter and the input end of the fourth first-order RC low-pass filter are connected to the output end of the second bias circuit.
  • the temperature detection circuit further includes:
  • the first electromagnetic interference filter is arranged on the line between the first bias circuit and the first temperature sensor, and is used to filter out the electromagnetic interference in the first analog temperature signal;
  • the second electromagnetic interference filter is arranged on the line between the second bias circuit and the second temperature sensor, and is used for filtering electromagnetic interference in the second analog temperature signal.
  • the first electromagnetic interference filter includes a first ⁇ filter, a first magnetic bead, a second ⁇ filter, and a second magnetic bead;
  • the first ⁇ filter and the second ⁇ filter are used to filter out electromagnetic interference at a cutoff frequency and above in the first analog temperature signal;
  • the first magnetic bead and the second magnetic bead are used to filter out electromagnetic interference below the cutoff frequency in the first analog temperature signal
  • the input end of the first ⁇ filter is connected to one end of the first temperature sensor, the output end of the first ⁇ filter is connected to one end of the first magnetic bead, and the other end of the first magnetic bead One end is connected to the input end of the first bias circuit;
  • the input end of the second ⁇ filter is connected to the other end of the first temperature sensor, the output end of the second ⁇ filter is connected to one end of the second magnetic bead, and the second magnetic bead The other end is connected to the input end of the first bias circuit.
  • the second electromagnetic interference filter includes a third ⁇ filter, a third magnetic bead, a fourth ⁇ filter, and a fourth magnetic bead;
  • the third ⁇ filter and the fourth ⁇ filter are used to filter out electromagnetic interference at the cutoff frequency and above in the second analog temperature signal;
  • the third magnetic bead and the fourth magnetic bead are used to filter out electromagnetic interference below the cutoff frequency in the second analog temperature signal;
  • the input end of the third ⁇ filter is connected to one end of the second temperature sensor, the output end of the third ⁇ filter is connected to one end of the third magnetic bead, and the other end of the third magnetic bead One end is connected to the input end of the second bias circuit;
  • the input end of the fourth ⁇ filter is connected to the other end of the second temperature sensor, the output end of the fourth ⁇ filter is connected to one end of the fourth magnetic bead, and the fourth magnetic bead The other end is connected to the input end of the second bias circuit.
  • one end of the third temperature sensor is connected to a DC power supply through a pull-up resistor, and the connection point between the third temperature sensor and the pull-up resistor is used as the third temperature sensor
  • the output terminal of the third temperature sensor is grounded.
  • the temperature detection circuit further includes:
  • a matching network arranged on the line between the analog-to-digital conversion module and the micro control unit, for performing current limiting control and impedance matching on the first digital temperature signal and the second digital temperature signal control; the current limiting control is used to make the current values of the first digital temperature signal and the second digital temperature signal within the allowable range of the micro control unit, and the impedance matching control is used to make the The complete transmission of the first digital temperature signal and the second digital temperature signal to the micro control unit.
  • the first temperature sensor, the second temperature sensor and the third temperature sensor include thermocouples or thermal resistors.
  • the thermal resistor includes an NTC thermistor or a PTC thermistor.
  • the embodiment of this specification also provides an on-board charging device for a new energy vehicle, the on-board charging device for a new energy vehicle is configured with the above-mentioned temperature detection circuit.
  • the new energy vehicle on-board charging device includes a new energy on-board charging stand.
  • the embodiment of this specification also provides a new energy vehicle, the new energy vehicle is equipped with the above-mentioned on-board charging device for the new energy vehicle.
  • the embodiment of this specification also provides a method for detecting the temperature of an on-board charging device of a new energy vehicle, including:
  • the first digital temperature signal and the second digital temperature signal are corrected according to the digital ambient temperature signal.
  • the correcting the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal includes:
  • x 1 is the first digital temperature signal
  • x 2 is the second digital temperature signal
  • f(x 1 ) is the corrected first digital temperature signal
  • f(x 2 ) is the corrected second digital temperature signal
  • ⁇ is the time constant
  • a is the temperature compensation coefficient
  • k 1 and b 1 are the lower limit of the specified current respectively
  • k 2 and b 2 are respectively the slope and intercept of the straight line corresponding to the two temperature points when the temperature rises by one degree from the upper limit temperature under the specified current.
  • the embodiment of this specification also provides a computer device, including a memory, a processor, and a computer program stored on the memory.
  • a computer program stored on the memory.
  • the embodiment of this specification also provides a computer storage medium, on which a computer program is stored, and when the computer program is run by a processor of a computer device, instructions for executing the above method are executed.
  • the first digital temperature signal at the positive connection terminal can be corrected according to the digital ambient temperature signal
  • the first digital temperature signal at the positive connection terminal can be corrected according to the digital ambient temperature signal.
  • the second digital temperature signal at the terminal is corrected.
  • Fig. 1 shows a structural block diagram of a temperature detection circuit of a new energy vehicle on-board charging device in some embodiments of this specification
  • Fig. 2 shows the circuit principle diagram of the temperature detection circuit of the new energy vehicle on-board charging device in some embodiments of this specification
  • Fig. 3 shows a structural block diagram of a temperature detection circuit of a new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 4 shows the circuit principle diagram of the temperature detection circuit of the new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 5 shows a structural block diagram of a temperature detection circuit of a new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 6 shows the circuit principle diagram of the temperature detection circuit of the new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 7 shows a structural block diagram of a temperature detection circuit of a new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 8 shows the circuit principle diagram of the temperature detection circuit of the new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 9 shows a structural block diagram of a temperature detection circuit of a new energy vehicle on-board charging device in other embodiments of this specification.
  • Fig. 10 shows the schematic circuit diagram of the temperature detection circuit of the new energy vehicle on-board charging device in other embodiments of this specification
  • Fig. 11 shows the flowchart of the temperature detection method of the new energy vehicle on-board charging device in some embodiments of this specification
  • Fig. 12 shows a structural block diagram of a computer device in some embodiments of the present specification.
  • the first electromagnetic interference filter is a first electromagnetic interference filter
  • the first ⁇ filter The first ⁇ filter
  • the inventors of the present application found that: in the charging temperature monitoring scheme of the existing new energy vehicle charging device (such as the new energy vehicle charging stand), generally only one temperature sensor is provided to detect the charging temperature of the new energy vehicle.
  • On-board charging device for energy vehicles the temperature of the positive connection terminal and the negative connection terminal of the new energy vehicle on-board charging device may be inconsistent.
  • the charging temperature of the new energy vehicle on-board charging device may also be affected by the external environment temperature.
  • the embodiment of the present application provides an improved temperature detection circuit of the new energy vehicle on-board charging device.
  • the temperature detection circuit of the new energy vehicle on-board charging device may include: a first temperature sensor TH1, a second temperature sensor TH2, a third temperature sensor TH3, an analog-to-digital conversion (Analogue-to -Digital Conversion, A/D) module 10 and micro control unit (Microcontroller Unit, MCU) 20.
  • a first temperature sensor TH1 a second temperature sensor TH2
  • a third temperature sensor TH3 a third temperature sensor TH3
  • an analog-to-digital conversion Analogue-to -Digital Conversion, A/D
  • MCU micro control unit
  • the first temperature sensor TH1 is set at the positive connection terminal of the new energy vehicle on-board charging device, and is used to collect the first analog temperature signal of the positive connection terminal;
  • the second temperature sensor TH2 is set on the negative pole of the new energy vehicle on-board charging device
  • the connection terminal is used to collect the second analog temperature signal of the negative connection terminal;
  • the third temperature sensor TH3 is set in the housing of the new energy vehicle on-board charging device, and can be far away from the position of the heating device, used to collect the said The analog ambient temperature signal of the new energy vehicle on-board charging device.
  • the temperature of the positive connection terminal and the negative connection terminal of the new energy vehicle on-board charging device may be inconsistent, by setting temperature sensors at the positive connection terminal and the negative connection terminal respectively, the corresponding temperature of the positive connection terminal and the negative connection terminal can be obtained.
  • the charging temperature of the connecting terminal is conducive to obtaining a more accurate charging temperature of the on-board charging device of the new energy vehicle.
  • the third temperature sensor TH3 in the housing of the new energy vehicle on-board charging device and at a position away from the heating device, it is beneficial to obtain a more accurate ambient temperature; it should be noted that the ambient temperature here refers to the positive connection terminal and the ambient temperature of the negative connection terminal.
  • a heating device is any component that may affect the positive and negative connection terminals.
  • the heating device may include, for example, the micro control unit 20 of the temperature detection circuit and the like.
  • the above-mentioned measures for arranging the third temperature sensor TH3 away from the heat-generating device may include:
  • the third temperature sensor For example, within a specified radius (for example, 1 cm) centered on the third temperature sensor: no components are placed on the front and back sides of the printed circuit board (i.e. PCB board), the PCB board is not covered with copper (two-layer board or multi-layer board), and /or sensor signal line PCB layout line width and line resistance are designed according to the sensor manufacturer's recommendation.
  • PCB board printed circuit board
  • the PCB board is not covered with copper (two-layer board or multi-layer board)
  • sensor signal line PCB layout line width and line resistance are designed according to the sensor manufacturer's recommendation.
  • the third temperature sensor can be placed as far away from the heat-generating device as possible, due to actual conditions (such as the size of the charging device, etc.), the isolation distance may not achieve the expected effect; in this case, heat insulation cotton can be added as needed Or thermal insulation materials such as thermal insulation boards, in order to avoid interference by thermal radiation of heating devices.
  • the third temperature sensor can be placed at a position where the printed circuit board has better external air circulation (for example, it can be selected near the external low-voltage signal connector of the printed circuit board, etc.).
  • the first temperature sensor TH1 , the second temperature sensor TH2 and the third temperature sensor TH3 may be any suitable temperature sensors.
  • the first temperature sensor TH1, the second temperature sensor TH2, and the third temperature sensor TH3 can also be NTC (Negative Temperature Coefficient) thermistors; in another embodiment, the first temperature sensor TH1 , The second temperature sensor TH2 and the third temperature sensor TH3 may be PTC (Positive Temperature Coefficient) thermistors.
  • the first temperature sensor TH1 , the second temperature sensor TH2 and the third temperature sensor TH3 may also be thermocouples or armored thermocouples.
  • the analog-to-digital conversion module 10 is generally a multi-channel analog-to-digital conversion module, that is, capable of simultaneously converting multiple channels of analog signals into corresponding digital signals.
  • the outputs of the first temperature sensor TH1, the second temperature sensor TH2 and the third temperature sensor TH3 are all analog signals, and the micro-control unit 20 can generally only recognize digital signals, so it is necessary to use the analog-to-digital conversion module 10 to convert the first analog signal
  • the temperature signal and the second analog temperature signal are correspondingly converted into a first digital temperature signal and a second digital temperature signal.
  • the microcontroller unit 20 itself may have a certain analog-to-digital conversion capability (for example, the microcontroller unit 20 is integrated with an analog-to-digital conversion circuit), therefore, the analog ambient temperature signal output by the third temperature sensor TH3 can be It is directly input to the analog-to-digital conversion circuit inside the microcontroller unit 20 for analog-to-digital conversion, so that a digital ambient temperature signal can be obtained.
  • the micro control unit 20 can also choose a micro control unit 20 that does not have any analog-to-digital conversion capability.
  • the analog-to-digital conversion module 10 should be able to convert at least three analog signals simultaneously In order to correspond to the capability of digital signals, the first analog temperature signal, the second analog temperature signal and the analog ambient temperature signal can be converted into corresponding digital signals.
  • the micro control unit 20 can also select a micro control unit 20 with multi-channel analog-to-digital conversion capability, so that the micro control unit 20 can directly convert the first analog temperature signal, the second analog temperature signal and The analog ambient temperature signal is converted into a corresponding digital signal; thus, the analog-to-digital conversion module 10 is saved.
  • the analog-to-digital conversion module 10 may be an integrated A/D chip U1 .
  • A/D chip U1 AIN0 ⁇ AIN4 are temperature analog signal input pins
  • DIN and DOUT/DRDY are temperature digital signal output pins
  • CS_ chip select signal input pin
  • SCLK clock signal input pin pin
  • GND is the ground pin
  • VDD is the power pin (for example, an external 5V DC power supply can be connected).
  • AIN0-AIN2 are respectively connected to both ends of the first temperature sensor TH1
  • AIN3-AIN4 are respectively connected to both ends of the second temperature sensor TH2.
  • DIN and DOUT/DRDY are respectively connected to the micro control unit 20 to output two temperature digital signals to the micro control unit 20 .
  • the CS_ pin and the SCLK pin of the A/D chip U1 are respectively connected to the micro control unit 20 to realize the control of the analog-to-digital conversion module 10 .
  • the output of the A/D chip U1 can adopt a digital SPI (Serial Peripheral Interface) communication method, and can be cascaded and expanded in multiple groups to facilitate the use of multiple temperature detection points.
  • SPI Serial Peripheral Interface
  • one end of the third temperature sensor TH3 is connected to a DC power supply (such as a 5V DC power supply) through a pull-up resistor R4, and the connection point between the third temperature sensor TH3 and the pull-up resistor R4 serves as The output end of the third temperature sensor TH3, the other end of the third temperature sensor TH3 is grounded.
  • a DC power supply such as a 5V DC power supply
  • the micro-control unit 20 can also be called a single-chip microcomputer, and is the control processing center of the on-board charging device of the new energy vehicle.
  • the micro control unit 20 can also be replaced with other control processing chips such as a microprocessor unit (Micro Processor Unit, MPU).
  • MPU Micro Processor Unit
  • correcting the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal means: correcting the first digital temperature signal according to the digital ambient temperature signal Correction is performed, and the second digital temperature signal is corrected according to the digital ambient temperature signal.
  • the micro control unit 20 can perform safety control in time accordingly, so as to improve the charging performance of the on-board charging device of the new energy vehicle. safety and charging efficiency. Specifically, in the existing technology, if the collected charging temperature is lower than the actual charging temperature, it is easy to cause high temperature of the new energy vehicle on-board charging device; if the collected charging temperature is higher than the actual charging temperature, it is easy to cause the new energy vehicle on-board charging device to malfunction. action (such as cutting off the charging circuit), which will affect the charging efficiency.
  • the charging temperature detected by the temperature detection circuit of the new energy vehicle on-board charging device is more accurate, so that it is possible to avoid malfunctions or energy on-board charging stations caused by inaccurate charging temperature detection in the prior art with a high probability. High temperature problem, thereby improving the charging safety and charging efficiency of the new energy vehicle on-board charging device.
  • the correcting the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal may include:
  • x1 is the first digital temperature signal
  • x 2 is the second digital temperature signal
  • f(x 1 ) is the first digital temperature signal after correction
  • f(x 2 ) is the second digital temperature signal after correction
  • ⁇ is the time constant
  • a is the temperature compensation coefficient
  • k 1 and b 1 are respectively the lower limit temperature under the specified current
  • the specified current can be, for example, 500A, 300A, etc., which can be selected according to actual needs.
  • Both the lower limit temperature and the upper limit temperature are ambient temperatures, which can be determined according to the working environment temperature of the new energy vehicle on-board charging device during implementation.
  • the lower limit temperature can be -40°C and the upper limit temperature can be 80°C. °C.
  • a straight line can be determined between the temperature point -40°C and the temperature point -39°C, then based on this A straight line can get k 1 and b 1 .
  • a straight line can be determined at the temperature point 80°C and the temperature point 81°C, and based on the straight line can be Get k 2 and b 2 .
  • the temperature compensation coefficient a there is a linear corresponding relationship between the temperature compensation coefficient a and the digital ambient temperature signal z, and this corresponding relationship can be pre-stored in the form of a relationship curve.
  • the new energy vehicle on-board charging device can also include a first bias circuit 31 and a second bias circuit 32.
  • the first bias circuit 31 may be arranged on the line between the first temperature sensor TH1 and the analog-to-digital conversion module 10, and is used to set the common-mode voltage of the first temperature sensor TH1 at the first the specified voltage range of the temperature sensor TH1, and detect whether an open circuit fault occurs in the first temperature sensor TH1.
  • the second bias circuit 32 can be set on the line between the second temperature sensor TH2 and the analog-to-digital conversion module 10, and is used to set the common-mode voltage of the second temperature sensor TH2 at the second The specified voltage range of the temperature sensor TH2, and detect whether an open circuit fault occurs in the second temperature sensor TH2, that is, when the analog-to-digital conversion module 10 obtains a signal value exceeding the specified voltage range of the first temperature sensor TH1, it can be identified accordingly When an open-circuit fault occurs in the first temperature sensor TH1, when the analog-to-digital conversion module 10 obtains a signal value exceeding the specified voltage range of the second temperature sensor TH2, it can be identified accordingly that an open-circuit fault occurs in the second temperature sensor TH2, thereby achieving an open circuit. Fault detection function.
  • the above specified voltage range may be specifically determined according to the performance parameters of the actually used temperature sensor.
  • the first bias circuit 31 may include a first weak pull-up resistor R6 and a first weak pull-down resistor R12 .
  • One end of the first weak pull-up resistor R6 is connected to one end of the first temperature sensor TH1, and the other end of the first weak pull-up resistor R6 is connected to a DC power supply (such as a 5V DC power supply); the first One end of the weak pull-down resistor R12 is connected to the other end of the first temperature sensor TH1, and the other end of the first weak pull-down resistor R12 is grounded.
  • the detection method of the analog-to-digital conversion module 10 is a differential mode detection method, and the first weak pull-up resistor R6 and the first weak pull-down resistor R12 provide the analog-to-digital conversion module 10 with leads for detecting the open circuit fault of the first temperature sensor TH1; When the first temperature sensor TH1 is turned off, its positive input is pulled up to VDD (eg 5V) and its negative input is pulled down to GND, thereby indicating this fault condition.
  • VDD eg 5V
  • the second bias circuit 32 may include a second weak pull-up resistor R13 and a second weak pull-down resistor R7 .
  • One end of the second weak pull-up resistor R13 is connected to one end of the second temperature sensor TH2, and the other end of the second weak pull-up resistor R13 is connected to a DC power supply (such as a 5V DC power supply); the second One end of the weak pull-down resistor R7 is connected to the other end of the second temperature sensor TH2, and the other end of the second weak pull-down resistor R7 is grounded.
  • the detection mode of the analog-to-digital conversion module 10 is a differential mode detection mode, and the second weak pull-up resistor R13 and the second weak pull-down resistor R7 provide the analog-to-digital conversion module 10 with leads for detecting the open circuit fault of the second temperature sensor TH2;
  • VDD eg 5V
  • GND GND
  • weak pull-up and weak pull-down both mean that the current flowing through the temperature sensor is small (even weak), so they are called weak pull-up and weak pull-down.
  • the current flowing through the temperature sensor should not be too large. If it is too large, the temperature sensor will heat itself. At this time, the temperature detected by the temperature sensor will be inaccurate, making it difficult to better characterize the detected point. temperature. Therefore, the resistance values of the aforementioned weak pull-up resistors and weak pull-down resistors should be set as large as possible (for example, at the megohm level), so that the current flowing through the temperature sensor is as small as possible to reduce the influence of self-heating on the detection results.
  • the temperature detection circuit of the new energy vehicle on-board charging device may further include a first passive filter 41 and a second passive filter 42 .
  • the first passive filter 41 can be arranged on the line between the first bias circuit 31 and the analog-to-digital conversion module 10, for suppressing aliasing distortion and high frequency noise;
  • the second passive filter 42 can be arranged on the line between the second bias circuit 32 and the analog-to-digital conversion module 10, for suppressing the aliasing in the second analog temperature signal Distortion and high frequency noise.
  • both the first passive filter 41 and the second passive filter 42 may be first-order passive filters to obtain a more stable filtering result.
  • the first passive filter 41 may include a first first-order RC low-pass filter (ie, resistor R8 and capacitor C1 in FIG. 6 ), a second first-order RC low-pass filter filter (that is, the resistor R10 and the capacitor C5 in FIG. 6 ) and the first differential capacitor C3.
  • a first first-order RC low-pass filter ie, resistor R8 and capacitor C1 in FIG. 6
  • a second first-order RC low-pass filter filter that is, the resistor R10 and the capacitor C5 in FIG. 6
  • the first differential capacitor C3 the first differential capacitor C3.
  • the first differential capacitor C3 is connected between the output end of the first first-order RC low-pass filter and the output end of the second first-order RC low-pass filter, so that the resistor R8, the resistor R10, and the capacitor C1, capacitor C5 and the first differential capacitor C3 can form a differential RC filter, thereby improving the effect of suppressing aliasing distortion and high-frequency noise; the input end of the first first-order RC low-pass filter and the second one The input terminal of the first-order RC low-pass filter is connected with the output terminal of the first bias circuit 31.
  • the second passive filter 42 includes a third first-order RC low-pass filter (ie, resistor R9 and capacitor C2 in FIG. 6 ), a fourth first-order RC low-pass filter pass filter (that is, the resistor R11 and the capacitor C6 in FIG. 6 ) and the second differential capacitor C4.
  • a third first-order RC low-pass filter ie, resistor R9 and capacitor C2 in FIG. 6
  • a fourth first-order RC low-pass filter pass filter that is, the resistor R11 and the capacitor C6 in FIG. 6
  • the second differential capacitor C4 the third first-order RC low-pass filter
  • the second differential capacitor C4 is connected between the output end of the third first-order RC low-pass filter and the output end of the fourth first-order RC low-pass filter, so that the resistor R9, the resistor R11, and the capacitor C2, capacitor C6 and the second differential capacitor C4 can form a differential RC filter, thereby improving the effect of suppressing aliasing distortion and high-frequency noise; the input end of the third first-order RC low-pass filter and the fourth first-order The input terminal of the second-order RC low-pass filter is connected with the output terminal of the second bias circuit 32.
  • the capacitors C1 , C2 , C5 and C6 may have the same capacitance value, the same package size, and be placed relatively close to each other on the circuit board.
  • the temperature sensors such as the first temperature sensor TH1 and the second temperature sensor TH2
  • the two signal lines will be mixed with noise in the same direction.
  • the noise flows through the first passive filter 41 and the When the second passive filter 42 is used, it will be attenuated or filtered by the nodes of capacitor C1 , capacitor C5 , capacitor C2 , and capacitor C6 , so as to provide a stable anti-interference effect during the temperature detection process.
  • the temperature detection circuit of the new energy vehicle on-board charging device can also include a first electromagnetic interference filter 51 and a second electromagnetic interference filter Device 52.
  • the first electromagnetic interference filter 51 can be arranged on the line between the first bias circuit 31 and the first temperature sensor TH1, and is used to filter out the electromagnetic interference in the first analog temperature signal;
  • the second electromagnetic interference filter 52 can be arranged on the line between the second bias circuit 32 and the second temperature sensor TH2 for filtering the electromagnetic interference in the second analog temperature signal.
  • the first electromagnetic interference filter 51 may include a first ⁇ filter 51a, a first magnetic bead FB3, a second ⁇ filter 51b, and a second magnetic bead FB5; the first ⁇ filter The filter 51a is composed of a capacitor C9, a capacitor C10 and a magnetic bead FB4; the second ⁇ filter 51b is composed of a capacitor C11, a capacitor C12 and a magnetic bead FB6.
  • the input end of the first ⁇ filter 51a is connected to one end of the first temperature sensor TH1, the output end of the first ⁇ filter 51a is connected to one end of the first magnetic bead FB3, and the first The other end of the magnetic bead FB3 is connected to the input end of the first bias circuit 31; the input end of the second ⁇ filter 51b is connected to the other end of the first temperature sensor TH1, and the second ⁇ filter
  • the output end of the device 51b is connected to one end of the second magnetic bead FB5, and the other end of the second magnetic bead FB5 is connected to the input end of the first bias circuit 31.
  • the first ⁇ filter 51a and the second ⁇ filter 51b can be used to filter out electromagnetic interference located at the cutoff frequency and above in the first analog temperature signal.
  • the first ⁇ filter 51a and the second ⁇ filter 51b can filter out Electromagnetic interference of 50Hz and above frequency.
  • the first magnetic bead FB3 and the second magnetic bead FB5 can be used to filter out electromagnetic interference below the cutoff frequency in the first analog temperature signal.
  • the first magnetic bead FB3 and the second magnetic bead FB5 can be used to filter out the frequency Electromagnetic interference below 50Hz.
  • the second electromagnetic interference filter 52 can include the third ⁇ filter 52a, the third magnetic bead FB2, the fourth ⁇ filter 52b and the fourth magnetic bead FB8; the third ⁇ filter 52a consists of The capacitor C7, the capacitor C8 and the magnetic bead FB1 are composed; the fourth ⁇ filter 52b is composed of the capacitor C13, the capacitor C14 and the magnetic bead FB7.
  • the input end of the third ⁇ filter 52a is connected to one end of the second temperature sensor TH2, the output end of the third ⁇ filter 52a is connected to one end of the third magnetic bead FB2, and the third The other end of the magnetic bead FB2 is connected to the input end of the second bias circuit 32; the input end of the fourth ⁇ filter 52b is connected to the other end of the second temperature sensor TH2, and the fourth ⁇ filter
  • the output end of the device 52b is connected to one end of the fourth magnetic bead FB8, and the other end of the fourth magnetic bead FB8 is connected to the input end of the second bias circuit 32.
  • the third ⁇ filter 52a and the fourth ⁇ filter 52b are used to filter out the electromagnetic interference at the cutoff frequency and above in the second analog temperature signal; the third magnetic bead FB2 and the The fourth magnetic bead FB8 is used to filter out electromagnetic interference below the cutoff frequency in the second analog temperature signal.
  • the first magnetic bead FB3 , the second magnetic bead FB5 , the third magnetic bead FB2 and the fourth magnetic bead FB8 can also be replaced with inductors.
  • the temperature detection circuit of the new energy vehicle on-board charging device A matching network 60 may also be included.
  • the matching network 60 may be arranged on the line between the analog-to-digital conversion module 10 and the micro control unit 20, and is used for current limiting control of the first digital temperature signal and the second digital temperature signal and impedance matching control; the current limiting control is used to make the current values of the first digital temperature signal and the second digital temperature signal within the allowable range of the micro control unit 20, and the impedance matching control is used To make the complete transmission of the first digital temperature signal and the second digital temperature signal to the micro control unit 20, that is, to prevent the first digital temperature output from the analog-to-digital conversion module 10 to the micro control unit 20 The signal and the second digital temperature signal generate signal reflection waves, preventing incomplete transmission of the first digital temperature signal and the second digital temperature signal to the micro control unit 20 .
  • the matching network 60 may include a resistor R1 , a resistor R2 , a resistor R3 and a resistor R5 .
  • one end of the resistor R1 is connected with the DOUT/DRDY pin of the A/D chip U1, and the other end of the resistor R1 is connected with the micro control unit 20; one end of the resistor R2 is connected with the DIN pin of the A/D chip U1, and the resistor R2 is connected with the DIN pin of the A/D chip U1.
  • the other end of the resistance R3 is connected with the micro control unit 20; one end of the resistance R3 is connected with the SCLK pin of the A/D chip U1, and the other end of the resistance R3 is connected with the micro control unit 20; one end of the resistance R3 is connected with the CS of the A/D chip U1 _ pins, and the other end of the resistor R4 is connected to the MCU 20.
  • the embodiment of this specification also provides an on-board charging device for new energy vehicles, the on-board charging device for new energy vehicles is configured with the above-mentioned temperature detection circuit.
  • the new energy vehicle on-board charging device may include, but not limited to, a new energy on-board charging stand and the like.
  • the embodiment of this specification also provides a new energy vehicle, which is equipped with the above-mentioned on-board charging device for new energy vehicles.
  • the embodiment of this specification also provides a temperature detection method for the on-board charging device of new energy vehicles, which can be applied to the temperature detection of the above-mentioned on-board charging device for new energy vehicles
  • the temperature detection method of the on-board charging device of the new energy vehicle may include the following steps:
  • S111 Collect the first analog temperature signal of the positive connection terminal, the second analog temperature signal of the negative connection terminal, and the analog ambient temperature signal of the on-board charging device of the new energy vehicle.
  • the temperature detection circuit of the new energy vehicle on-board charging device can use its first temperature sensor, second temperature sensor and third temperature sensor to correspondingly collect the first analog temperature signal, the second analog temperature signal and the analog ambient temperature signal.
  • the temperature detection circuit of the new energy vehicle on-board charging device can use its analog-to-digital conversion module to convert the first analog temperature signal, the second analog temperature signal and the analog ambient temperature signal into a first digital temperature signal, a second digital temperature signal and a digital ambient temperature signal.
  • the temperature detection circuit of the on-board charging device of the new energy vehicle can use its micro-control unit to execute the step of correcting the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal.
  • correcting the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal means: correcting the second digital temperature signal according to the digital ambient temperature signal A digital temperature signal is corrected, and a second digital temperature signal is corrected according to the digital ambient temperature signal.
  • the correcting the first digital temperature signal and the second digital temperature signal according to the digital ambient temperature signal may include:
  • x 1 is the first digital temperature signal
  • x 2 is the second digital temperature signal
  • f(x 1 ) is the corrected first digital temperature signal
  • f(x 2 ) is the corrected second digital temperature signal
  • ⁇ is the time constant
  • a is the temperature compensation coefficient
  • k 1 and b 1 are the lower limit of the specified current respectively
  • k 2 and b 2 are respectively the slope and intercept of the straight line corresponding to the two temperature points when the temperature rises by one degree from the upper limit temperature under the specified current.
  • the temperature detection method in the embodiment of this specification can correct the first digital temperature signal at the positive connection terminal according to the digital ambient temperature signal, and correct the second digital temperature signal at the negative connection terminal according to the digital ambient temperature signal. Correction.
  • the charging temperature of the positive connection terminal and the charging temperature of the negative connection terminal under the influence of the ambient temperature can be obtained, so that a more accurate charging temperature of the new energy vehicle on-board charging device can be obtained, which in turn is conducive to improving the charging of the new energy vehicle on-board charging device. safety and charging efficiency.
  • the embodiment of this specification also provides a computer device.
  • the computer device 1202 may include one or more processors 1204, such as one or more central processing units (CPUs) or graphics processing units (GPUs), each A processing unit may implement one or more hardware threads.
  • the computer device 1202 may also include any memory 1206 for storing any kind of information such as codes, settings, data, etc.
  • a computer program on the memory 1206 and executable on the processor 1204 When the computer program is run by the processor 1204, it can execute the instructions of the method for detecting the temperature of the on-board charging device of a new energy vehicle described in any of the above embodiments.
  • Non-limiting, for example, the memory 1206 may include any one or combination of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory can use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of computer device 1202 . In one instance, when processor 1204 executes the associated instructions stored in any memory or combination of memories, computing device 1202 may perform any operation of the associated instructions.
  • the computer device 1202 also includes one or more drive mechanisms 1208 for interfacing with any memory, such as a hard disk drive, an optical disk drive, or the like.
  • Computer device 1202 may also include input/output interface 1210 (I/O) for receiving various inputs (via input device 1212 ) and for providing various outputs (via output device 1214 ).
  • One particular output mechanism may include a presentation device 1216 and an associated graphical user interface 1218 (GUI).
  • GUI graphical user interface
  • the input/output interface 1210 (I/O), the input device 1212 and the output device 1214 may not be included, and it is only used as a computer device in the network.
  • Computer device 1202 may also include one or more network interfaces 1220 for exchanging data with other devices via one or more communication links 1222 .
  • One or more communication buses 1224 couple together the components described above.
  • Communication link 1222 can be implemented in any manner, for example, through a local area network, wide area network (eg, the Internet), point-to-point connection, etc., or any combination thereof.
  • Communication link 1222 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processor to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processor, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby
  • the instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.
  • a computer device includes one or more processors (CPUs), input/output interfaces, network interfaces and memory.
  • processors CPUs
  • input/output interfaces network interfaces
  • memory volatile and non-volatile memory
  • Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and/or nonvolatile memory such as read-only memory (ROM) or flash RAM. Memory is an example of computer readable media.
  • RAM random access memory
  • ROM read-only memory
  • flash RAM flash random access memory
  • Computer-readable media including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information.
  • Information may be computer readable instructions, data structures, modules of a program, or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape, disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by computer equipment.
  • computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.
  • embodiments of this specification may be provided as methods, systems or computer program products. Accordingly, the embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • Embodiments of the present specification may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer.
  • program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
  • Embodiments of the present description may also be practiced in distributed computing environments where tasks are performed by remote processors that are linked through a communications network.
  • program modules may be located in both local and remote computer storage media including storage devices.
  • each embodiment of the present invention is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.
  • the core improvement part is basically similar to the embodiment of the temperature detection circuit, the description It is relatively simple, and for the related information, please refer to the part of the description of the embodiment of the temperature detection circuit.
  • references to the terms “one embodiment,” “some embodiments,” “example,” “specific examples,” or “some examples” means that specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the embodiments of the present invention.
  • the schematic representations of the above terms are not necessarily directed to the same embodiment or example.
  • the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
  • those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in the present invention without conflicting with each other.

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Abstract

一种新能源车、车载充电装置、温度检测电路及温度检测方法，电路包括：第一温度传感器(TH1)，采集正极连接端的第一模拟量温度信号；第二温度传感器(TH2)，采集负极连接端的第二模拟量温度信号；第三温度传感器(TH3)设于新能源车车载充电装置壳体内，采集新能源车车载充电装置的模拟量环境温度信号；模数转换模块(10)，将第一模拟量温度信号、第二模拟量温度信号和模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环境温度信号；微控制单元(20)，根据数字量环境温度信号对第一数字量温度信号和第二数字量温度信号进行校正。可提高新能源车车载充电装置充电温度检测的准确性。

Description

新能源车、车载充电装置、温度检测电路及温度检测方法
本申请要求2021年11月30日递交的申请号为202111450896X、发明名称为“新能源车、车载充电装置、温度检测电路及温度检测方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本说明书涉及新能源车车载充电装置技术领域，尤其是涉及一种新能源车、车载充电装置、温度检测电路及温度检测方法。
背景技术
目前，新能源电动汽车已成为全球交通行业中的发展趋势。新能源电动汽车的充电趋势也越加趋向于大功率直流快速充。随着大功率直流快速充电的快速普及，与之而来了大功率电能传输所带来的部分电能转换为对外散发的热能问题。此部分热能对新能源充电系统及新能源电动车辆均为有害的，管控不好极易发生充电中起火等火灾安全隐患，所以需要监控新能源车车载充电装置的充电温度。然而，现有新能源车车载充电装置的充电温度监控方案易出现温度检测不准的问题。
发明内容
本说明书实施例的目的在于提供一种新能源车、车载充电装置、温度检测电路及温度检测方法，以提高新能源车车载充电装置充电温度检测的准确性。
为达到上述目的，一方面，本说明书实施例提供了一种新能源车车载充电装置的温度检测电路，包括：
第一温度传感器，设置于新能源车车载充电装置的正极连接端子处，用于采集所述正极连接端子的第一模拟量温度信号；
第二温度传感器，设置于新能源车车载充电装置的负极连接端子处，用于采集所述负极连接端子的第二模拟量温度信号；
第三温度传感器，设置于新能源车车载充电装置壳体内，用于采集所述新能源车车载充电装置的模拟量环境温度信号；
模数转换模块，用于将所述第一模拟量温度信号、所述第二模拟量温度信号和所述模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环 境温度信号；
微控制单元，用于根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正。
本说明书实施例的温度检测电路中，所述模数转换模块集成于所述微控制单元中。
本说明书实施例的温度检测电路中，所述根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正，包括：
根据公式f(x 1)＝x 1×(1+τx 1)/(1+ax 1)对所述第一数字量温度信号进行校正；以及，根据公式f(x 2)＝x 2×(1+τx 2)/(1+ax 2)对所述第二数字量温度信号进行校正；
其中，x 1为第一数字量温度信号，x 2为第二数字量温度信号，f(x 1)为校正后第一数字量温度信号，f(x 2)为校正后第二数字量温度信号，τ为时间常数，a为温度补偿系数，且a＝(k 1×z+b 1)×τ+(k 2×z+b 2)，k 1和b 1分别为指定电流下从下限温度升温一度时，两温度点对应直线的斜率和截距，k 2和b 2分别为指定电流下从上限温度升温一度时，两温度点对应直线的斜率和截距。
本说明书实施例的温度检测电路中，所述温度检测电路还包括：
第一偏置电路，设置于所述第一温度传感器与所述模数转换模块之间的线路上，用于将所述第一温度传感器的共模电压设置在所述第一温度传感器的指定电压范围，并检测所述第一温度传感器是否出现开路故障；
第二偏置电路，设置于所述第二温度传感器与所述模数转换模块之间的线路上，用于将所述第二温度传感器的共模电压设置在所述第二温度传感器的指定电压范围，并检测所述第二温度传感器是否出现开路故障。
本说明书实施例的温度检测电路中，所述第一偏置电路包括第一弱上拉电阻和第一弱下拉电阻；
所述第一弱上拉电阻的一端与所述第一温度传感器的一端连接，所述第一弱上拉电阻的另一端连接直流电源；
所述第一弱下拉电阻的一端与所述第一温度传感器的另一端连接，所述第一弱下拉电阻的另一端接地。
本说明书实施例的温度检测电路中，所述第二偏置电路包括第二弱上拉电阻和第二弱下拉电阻；
所述第二弱上拉电阻的一端与所述第二温度传感器的一端连接，所述第二弱上拉电阻的另一端连接直流电源；
所述第二弱下拉电阻的一端与所述第二温度传感器的另一端连接，所述第二弱下拉电阻的另一端接地。
本说明书实施例的温度检测电路中，所述温度检测电路还包括：
第一无源滤波器，设置于所述第一偏置电路与所述模数转换模块之间的线路上，用于抑制所述第一模拟量温度信号中的混叠失真及高频噪声；
第二无源滤波器，设置于所述第二偏置电路与所述模数转换模块之间的线路上，用于抑制所述第二模拟量温度信号中的混叠失真及高频噪声。
本说明书实施例的温度检测电路中，所述第一无源滤波器包括第一一阶RC低通滤波器、第二一阶RC低通滤波器和第一差分电容；
所述第一差分电容跨接于所述第一一阶RC低通滤波器的输出端及所述第二一阶RC低通滤波器的输出端之间；所述第一一阶RC低通滤波器的输入端及所述第二一阶RC低通滤波器的输入端，与所述第一偏置电路的输出端连接。
本说明书实施例的温度检测电路中，所述第二无源滤波器包括第三一阶RC低通滤波器、第四一阶RC低通滤波器和第二差分电容；
所述第二差分电容跨接于所述第三一阶RC低通滤波器的输出端及所述第四一阶RC低通滤波器的输出端之间；所述第三一阶RC低通滤波器的输入端及所述第四一阶RC低通滤波器的输入端，与所述第二偏置电路的输出端连接。
本说明书实施例的温度检测电路中，所述温度检测电路，还包括：
第一电磁干扰滤波器，设置于所述第一偏置电路与所述第一温度传感器之间的线路上，用于滤除所述第一模拟量温度信号中的电磁干扰；
第二电磁干扰滤波器，设置于所述第二偏置电路与所述第二温度传感器之间的线路上，用于滤除所述第二模拟量温度信号中的电磁干扰。
本说明书实施例的温度检测电路中，所述第一电磁干扰滤波器包括第一π滤波器、第一磁珠、第二π滤波器和第二磁珠；
所述第一π滤波器和所述第二π滤波器，用于滤除所述第一模拟量温度信号中位于截止频率及其以上的电磁干扰；
所述第一磁珠和所述第二磁珠，用于滤除所述第一模拟量温度信号中位于所述截止频率以下的电磁干扰；
所述第一π滤波器的输入端与所述第一温度传感器的一端连接，所述第一π滤波器的输出端与所述第一磁珠的一端连接，所述第一磁珠的另一端与所述第一偏置电路的输 入端连接；
所述第二π滤波器的输入端与所述第一温度传感器的另一端连接，所述第二π滤波器的输出端与所述第二磁珠的一端连接，所述第二磁珠的另一端与所述第一偏置电路的输入端连接。
本说明书实施例的温度检测电路中，所述第二电磁干扰滤波器包括第三π滤波器、第三磁珠、第四π滤波器和第四磁珠；
所述第三π滤波器和所述第四π滤波器，用于滤除所述第二模拟量温度信号中位于截止频率及其以上的电磁干扰；
所述第三磁珠和所述第四磁珠，用于滤除所述第二模拟量温度信号中位于所述截止频率以下的电磁干扰；
所述第三π滤波器的输入端与所述第二温度传感器的一端连接，所述第三π滤波器的输出端与所述第三磁珠的一端连接，所述第三磁珠的另一端与所述第二偏置电路的输入端连接；
所述第四π滤波器的输入端与所述第二温度传感器的另一端连接，所述第四π滤波器的输出端与所述第四磁珠的一端连接，所述第四磁珠的另一端与所述第二偏置电路的输入端连接。
本说明书实施例的温度检测电路中，所述第三温度传感器的一端通过上拉电阻接直流电源，所述第三温度传感器与所述上拉电阻之间的连接点作为所述第三温度传感器的输出端，所述第三温度传感器的另一端接地。
本说明书实施例的温度检测电路中，所述温度检测电路还包括：
匹配网络，设置于所述模数转换模块与所述微控制单元之间的线路上，用于对所述第一数字量温度信号和所述第二数字量温度信号进行限流控制和阻抗匹配控制；所述限流控制用于使所述第一数字量温度信号和所述第二数字量温度信号的电流值位于所述微控制单元的允许范围，所述阻抗匹配控制用于使所述第一数字量温度信号和所述第二数字量温度信号的完整地传输给所述微控制单元。
本说明书实施例的温度检测电路中，所述第一温度传感器、所述第二温度传感器和所述第三温度传感器包括热电偶或热电阻。
本说明书实施例的温度检测电路中，所述热电阻包括NTC热敏电阻或PTC热敏电阻。
另一方面，本说明书实施例还提供了一种新能源车车载充电装置，所述新能源车车 载充电装置配置有上述的温度检测电路。
本说明书实施例的新能源车车载充电装置中，所述新能源车车载充电装置包括新能源车载充电座。
另一方面，本说明书实施例还提供了一种新能源车，所述新能源车配置有上述的新能源车车载充电装置。
另一方面，本说明书实施例还提供了一种新能源车车载充电装置的温度检测方法，包括：
采集正极连接端子的第一模拟量温度信号，负极连接端子的第二模拟量温度信号，以及所述新能源车车载充电装置的模拟量环境温度信号；
将所述第一模拟量温度信号、所述第二模拟量温度信号和所述模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环境温度信号；
根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正。
本说明书实施例的温度检测方法中，所述根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正，包括：
根据公式f(x 1)＝x 1×(1+τx 1)/(1+ax 1)对所述第一数字量温度信号进行校正；以及，根据公式f(x 2)＝x 2×(1+τx 2)/(1+ax 2)对所述第二数字量温度信号进行校正；
其中，x 1为第一数字量温度信号，x 2为第二数字量温度信号，f(x 1)为校正后第一数字量温度信号，f(x 2)为校正后第二数字量温度信号，τ为时间常数，a为温度补偿系数，且a＝(k 1×z+b 1)×τ+(k 2×z+b 2)，k 1和b 1分别为指定电流下从下限温度升温一度时，两温度点对应直线的斜率和截距，k 2和b 2分别为指定电流下从上限温度升温一度时，两温度点对应直线的斜率和截距。
另一方面，本说明书实施例还提供了一种计算机设备，包括存储器、处理器、以及存储在所述存储器上的计算机程序，所述计算机程序被所述处理器运行时，执行上述方法的指令。
另一方面，本说明书实施例还提供了一种计算机存储介质，其上存储有计算机程序，所述计算机程序被计算机设备的处理器运行时，执行上述方法的指令。
由以上本说明书实施例提供的技术方案可见，本说明书实施例中，可以根据数字量环境温度信号对正极连接端子处的第一数字量温度信号进行校正，以及根据数字量环境温度信号对负极连接端子处的第二数字量温度信号进行校正。如此，可以获得考虑环境 温度影响下的正极连接端子充电温度、负极连接端子充电温度，从而可以获得更加准确的新能源车车载充电装置的充电温度，进而有利于提高新能源车车载充电装置的充电安全和充电效率。
附图说明
为了更清楚地说明本说明书实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本说明书中记载的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1示出了本说明书一些实施例中新能源车车载充电装置的温度检测电路的结构框图；
图2示出了本说明书一些实施例中新能源车车载充电装置的温度检测电路的电路原理图；
图3示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的结构框图；
图4示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的电路原理图；
图5示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的结构框图；
图6示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的电路原理图；
图7示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的结构框图；
图8示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的电路原理图；
图9示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的结构框图；
图10示出了本说明书另一些实施例中新能源车车载充电装置的温度检测电路的电路原理图；
图11示出了本说明书一些实施例中新能源车车载充电装置的温度检测方法的流程 图；
图12示出了本说明书一些实施例中计算机设备的结构框图。
【附图标记说明】
TH1、第一温度传感器；
TH2、第二温度传感器；
TH3、第三温度传感器；
10、模数转换模块；
20、微控制单元；
31、第一偏置电路；
32、第二偏置电路；
41、第一无源滤波器；
42、第二无源滤波器；
51、第一电磁干扰滤波器；
51a、第一π滤波器；
51b、第二π滤波器；
52、第二电磁干扰滤波器；
52a、第三π滤波器；
52b、第四π滤波器；
60、匹配网络；
U1、A/D芯片；
1202、计算机设备；
1204、处理器；
1206、存储器；
1208、驱动机构；
1210、输入/输出接口；
1212、输入设备；
1214、输出设备；
1216、呈现设备；
1218、图形用户接口；
1220、网络接口；
1222、通信链路；
1224、通信总线。
具体实施方式
为了使本技术领域的人员更好地理解本说明书中的技术方案，下面将结合本说明书实施例中的附图，对本说明书实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本说明书一部分实施例，而不是全部的实施例。基于本说明书中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都应当属于本说明书保护的范围。
在实现本申请的过程中，本申请的发明人发现：现有新能源车车载充电装置(例如新能源车载充电座)的充电温度监控方案中，一般仅设置一个温度传感器，以用于检测新能源车车载充电装置。然而，在很多场景下，新能源车车载充电装置可能存在正极连接端子和负极连接端子温度不一致的情况，此外，新能源车车载充电装置的充电温度还可能收到外部环境温度的影响。有鉴于此，为了提高新能源车车载充电装置的充电温度检测的准确性，本申请实施例提供了改进的新能源车车载充电装置的温度检测电路。
参考图1所示，在一些实施例中，新能源车车载充电装置的温度检测电路可以包括：第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3、模数转换(Analogue-to-Digital Conversion，A/D)模块10和微控制单元(Microcontroller Unit，MCU)20。
第一温度传感器TH1设置于新能源车车载充电装置的正极连接端子处，用于采集所述正极连接端子的第一模拟量温度信号；第二温度传感器TH2设置于新能源车车载充电装置的负极连接端子处，用于采集所述负极连接端子的第二模拟量温度信号；第三温度传感器TH3设置于新能源车车载充电装置壳体内，并且可以远离发热器件的位置处，用于采集所述新能源车车载充电装置的模拟量环境温度信号。
鉴于在很多场景下，新能源车车载充电装置可能存在正极连接端子和负极连接端子温度不一致的情况，通过在正极连接端子处和负极连接端子处分别设置温度传感器，可以对应获取正极连接端子和负极连接端子的充电温度，从而有利于获得更为准确的新能源车车载充电装置的充电温度。通过将第三温度传感器TH3设置于新能源车车载充电装置壳体内并且可以远离发热器件的位置处，可以有利于获得更加准确的环境温度；应当指出的是，这里的环境温度是指正极连接端子和负极连接端子所处的环境温度。在本说 明书实施例中，发热器件是任何可能会影响正极连接端子和负极连接端子的零部件。例如，在一示例性实施例中，发热器件例如可以包括温度检测电路的微控制单元20等。
在一些实施例中，上述将第三温度传感器TH3设置于远离发热器件措施可以包括：
1)、隔离发热器件的热量传导。
例如，在以第三温度传感器为中心的指定半径(例如1cm)内：印刷电路板(即PCB板)正反面不放置元器件、PCB板不覆铜(两层板或多层板)、和/或传感器信号线PCB layout线宽及线阻按传感器厂商推荐设计。
2)、隔离发热器件的热量辐射。
虽然第三温度传感器可以被布设为尽可能远离发热器件，但因实际条件限制(例如载充电装置尺寸等)，隔离距离可能达不到预期效果；在此情况下，可以按需增加隔热棉或隔热板等隔热材料，以达到避免被发热器件热辐射干扰的目的。
3)、放置更接近环境温度位置处。
例如，可以将第三温度传感器放置在印刷电路板对外空气流通较好的位置上布置(比如可以选择印刷电路板对外低压信号连接器附近等)。
在一些实施例中，第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3可以为任何合适的温度传感器。例如，在一实施例中，第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3也可以为NTC(Negative Temperature Coefficient)热敏电阻；在另一实施例中，第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3可以为PTC(Positive Temperature Coefficient)热敏电阻。在另一实施例中，第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3还可以为热电偶或铠装热电偶等。
模数转换模块10一般为多路模数转换模块，即具备同时将多路模拟信号转换为对应数字信号的能力。第一温度传感器TH1、第二温度传感器TH2和第三温度传感器TH3输出的均为模拟信号，而微控制单元20一般仅能识别数字信号，因此需要利用模数转换模块10将所述第一模拟量温度信号和所述第二模拟量温度信号对应转换为第一数字量温度信号和第二数字量温度信号。在一些实施例中，微控制单元20本身可能具有一定模数转换能力(例如微控制单元20内部集成有一路模数转换电路)，因此，第三温度传感器TH3输出的模拟量环境温度信号，可直接输入至微控制单元20内部的模数转换电路进行模数转换，从而可以得到数字量环境温度信号。
当然，在另一些实施例中，微控制单元20也可选择不具备任何模数转换能力的微控 制单元20，则在此情况下，模数转换模块10应具备至少同时将三路模拟信号转换为对应数字信号的能力，以便于可以将第一模拟量温度信号、第二模拟量温度信号和模拟量环境温度信号转换为对应的数字信号。在另一些实施例中，微控制单元20也可选择具备多路模数转换能力的微控制单元20，使得利用微控制单元20可以直接将第一模拟量温度信号、第二模拟量温度信号和模拟量环境温度信号转换为对应的数字信号；如此，就节省了模数转换模块10。
结合图2所示，在一些实施例中，模数转换模块10可以为集成的A/D芯片U1。在A/D芯片U1中，AIN0～AIN4为温度模拟量信号输入引脚，DIN和DOUT/DRDY为温度数字量信号输出引脚，CS_为片选信号输入引脚，SCLK为时钟信号输入引脚，GND为接地引脚，VDD为电源引脚(例如可以外接5V直流电源等)。其中，AIN0～AIN2分别与第一温度传感器TH1的两端连接，AIN3～AIN4分别与第二温度传感器TH2的两端连接。DIN和DOUT/DRDY分别与微控制单元20相连，以向微控制单元20输出两路温度数字量信号。此外，A/D芯片U1的CS_引脚和SCLK引脚分别与微控制单元20相连，以实现对模数转换模块10的控制。在一些实施例中，A/D芯片U1的输出可以采用数字SPI(Serial Peripheral Interface)通信方式，并且可以多组级联扩展，以方便多温度检测点使用。
请继续参考图2所示，第三温度传感器TH3的一端通过上拉电阻R4接直流电源(例如5V直流电源)，所述第三温度传感器TH3与所述上拉电阻R4之间的连接点作为所述第三温度传感器TH3的输出端，所述第三温度传感器TH3的另一端接地。
微控制单元20也可以称为单片机，是新能源车车载充电装置的控制处理中心。在一些实施例中，微控制单元20也可以替换为微处理器单元(Micro Processor Unit，MPU)等其他控制处理芯片。
本说明书实施例中，根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正是指：根据数字量环境温度信号对第一数字量温度信号进行校正，以及根据数字量环境温度信号对第二数字量温度信号进行校正。如此，可以获得考虑环境温度影响下的正极连接端子充电温度、负极连接端子充电温度，从而可以获得更加准确的新能源车车载充电装置的充电温度。
进一步地，当正极连接端子充电温度和负极连接端子充电温度中，有任何一个达到或超过设定温度，则微控制单元20可以据此及时进行安全控制，以提高新能源车车载充电装置的充电安全和充电效率。具体而言，现有技术中，若采集的充电温度低于实际充 电温度，容易引发新能源车车载充电装置高温；若采集的充电温度高于实际充电温度，容易导致新能源车车载充电装置误动作(例如切断充电回路)，从而会影响充电效率。由于本说明书实施例中，新能源车车载充电装置的温度检测电路检测出的充电温度更加准确，从而可以大概率避免现有技术中因充电温度检测不准而导致的误动作或能源车载充电座高温问题，进而提高了新能源车车载充电装置的充电安全和充电效率。
在一些实施例中，所述根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正，可以包括：
根据公式f(x 1)＝x 1×(1+τx 1)/(1+ax 1)对所述第一数字量温度信号进行校正；以及，根据公式f(x 2)＝x 2×(1+τx 2)/(1+ax 2)对所述第二数字量温度信号进行校正。其中，x1为第一数字量温度信号，x 2为第二数字量温度信号，f(x 1)为校正后第一数字量温度信号，f(x 2)为校正后第二数字量温度信号，τ为时间常数，a为温度补偿系数，且a＝(k 1×z+b 1)×τ+(k 2×z+b 2)，k 1和b 1分别为指定电流下从下限温度升温一度时，两温度点对应直线的斜率和截距，k 2和b 2分别为指定电流下从上限温度升温一度时，两温度点对应直线的斜率和截距。
其中，指定电流例如可以为500A、300A等，具体可以根据实际需要选择。下限温度和上限温度均为环境温度，实施时可以根据新能源车车载充电装置的可工作环境温度确定，例如，在一示例性实施例中，下限温度可以为-40℃和上限温度可以为80℃。则在指定电流下当连接端子从温度-40℃升温至-39℃时，则在温度随时间变化的坐标系下，温度点-40℃和温度点-39℃可以确定一条直线，则基于该直线可以得到k 1和b 1。同理，在指定电流下当连接端子从温度80℃升温至81℃时，则在温度随时间变化的坐标系下，温度点80℃和温度点81℃可以确定一条直线，则基于该直线可以得到k 2和b 2。总之，温度补偿系数a与数字量环境温度信号z之间存在线性对应关系，这种对应关系可以以关系曲线的形式预先存储。在根据公式f(x)＝x×(1+τx)/(1+ax)对第一数字量温度信号和第二数字量温度信号进行校正时，可以通过实测的环境温度，从关系曲线中确定对应的温度补偿系数a。
参考图3所示，在一些实施例中，除了第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3、模数转换模块10、微控制单元20之外，新能源车车载充电装置的温度检测电路还可以包括第一偏置电路31和第二偏置电路32。
第一偏置电路31可以设置于所述第一温度传感器TH1与所述模数转换模块10之间的线路上，用于将所述第一温度传感器TH1的共模电压设置在所述第一温度传感器TH1 的指定电压范围，并检测所述第一温度传感器TH1是否出现开路故障。第二偏置电路32可以设置于所述第二温度传感器TH2与所述模数转换模块10之间的线路上，用于将所述第二温度传感器TH2的共模电压设置在所述第二温度传感器TH2的指定电压范围，并检测所述第二温度传感器TH2是否出现开路故障，即当模数转换模块10获取到超过第一温度传感器TH1的指定电压范围的信号值时，可以据此识别出第一温度传感器TH1出现开路故障，当模数转换模块10获取到超过第二温度传感器TH2的指定电压范围的信号值时，可以据此识别出第二温度传感器TH2出现开路故障，从实现开路故障检测的功能。上述的指定电压范围具体可以根据实际采用的温度传感器的性能参数确定。
结合图4所示，在一些实施例中，第一偏置电路31可以包括第一弱上拉电阻R6和第一弱下拉电阻R12。所述第一弱上拉电阻R6的一端与所述第一温度传感器TH1的一端连接，所述第一弱上拉电阻R6的另一端连接直流电源(例如5V直流电源等)；所述第一弱下拉电阻R12的一端与所述第一温度传感器TH1的另一端连接，所述第一弱下拉电阻R12的另一端接地。模数转换模块10的检测方式为差模检测方式，第一弱上拉电阻R6和第一弱下拉电阻R12为模数转换模块10提供了用来检测第一温度传感器TH1开路故障的引线；当第一温度传感器TH1断开时，其正输入被上拉至VDD(例如5V)，负输入被下拉至GND，从而指示这种故障情况。
请继续结合图4所示，在一些实施例中，第二偏置电路32可以包括第二弱上拉电阻R13和第二弱下拉电阻R7。所述第二弱上拉电阻R13的一端与所述第二温度传感器TH2的一端连接，所述第二弱上拉电阻R13的另一端连接直流电源(例如5V直流电源等)；所述第二弱下拉电阻R7的一端与所述第二温度传感器TH2的另一端连接，所述第二弱下拉电阻R7的另一端接地。模数转换模块10的检测方式为差模检测方式，第二弱上拉电阻R13和第二弱下拉电阻R7为模数转换模块10提供了用来检测第二温度传感器TH2开路故障的引线；当第二温度传感器TH2断开时，其正输入被上拉至VDD(例如5V)，负输入被下拉至GND，从而指示这种故障情况。
在图4所示实施例中，弱上拉、弱下拉均是指：流经温度传感器的电流较小(甚至是微弱)，所以称之为弱上拉、弱下拉。鉴于温度传感器也存在内阻，流过温度传感器的电流不应过大，过大则会导致温度传感器自身发热，此时温度传感器检测的温度就会不准确，从而难以较好的表征被检测点温度。因此，上述的弱上拉电阻及弱下拉电阻的阻值应设置尽可能大(例如可以是兆欧级别)，使得流经温度传感器内的电流尽量小，减少自身发热对检测结果的影响。
参考图5所示，在一些实施例中，除了第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3、模数转换模块10、微控制单元20、第一偏置电路31和第二偏置电路32之外，新能源车车载充电装置的温度检测电路还可以包括第一无源滤波器41和第二无源滤波器42。第一无源滤波器41可以设置于所述第一偏置电路31与所述模数转换模块10之间的线路上，用于抑制所述第一模拟量温度信号中的混叠失真及高频噪声；第二无源滤波器42可以设置于所述第二偏置电路32与所述模数转换模块10之间的线路上，用于抑制所述第二模拟量温度信号中的混叠失真及高频噪声。在一示例性实施例中，第一无源滤波器41和第二无源滤波器42可以均为一阶无源滤波器，以获得更加平稳的滤波结果。
结合图6所示，在一些实施例中，第一无源滤波器41可以包括第一一阶RC低通滤波器(即图6中的电阻R8和电容C1)、第二一阶RC低通滤波器(即图6中的电阻R10和电容C5)和第一差分电容C3。所述第一差分电容C3跨接于所述第一一阶RC低通滤波器的输出端及所述第二一阶RC低通滤波器的输出端之间，使得电阻R8、电阻R10、电容C1、电容C5和第一差分电容C3可以形成差分RC滤波器，从而提高抑制混叠失真及高频噪声的效果；所述第一一阶RC低通滤波器的输入端及所述第二一阶RC低通滤波器的输入端，与所述第一偏置电路31的输出端连接。
请继续结合图6所示，在一些实施例中，第二无源滤波器42包括第三一阶RC低通滤波器(即图6中的电阻R9和电容C2)、第四一阶RC低通滤波器(即图6中的电阻R11和电容C6)和第二差分电容C4。所述第二差分电容C4跨接于所述第三一阶RC低通滤波器的输出端及所述第四一阶RC低通滤波器的输出端之间，使得电阻R9、电阻R11、电容C2、电容C6和第二差分电容C4可以形成差分RC滤波器，从而提高抑制混叠失真及高频噪声的效果；所述第三一阶RC低通滤波器的输入端及所述第四一阶RC低通滤波器的输入端，与所述第二偏置电路32的输出端连接。
在图6所示实施例中，电容C1、电容C2、电容C5和电容C6可以具有相同电容值，相同规格的封装，且在电路板上的放置点相对接近的位置。如此，当温度传感器(例如第一温度传感器TH1、第二温度传感器TH2)引入共模噪声时，两条信号线上会参杂方向相同的噪声，当噪声流经第一无源滤波器41和第二无源滤波器42时，会被电容C1、电容C5、电容C2、电容C6节点衰减或过滤掉，从而还起到温度检测过程中的稳定抗干扰效果。
参考图7所示，在一些实施例中，除了第一温度传感器TH1、第二温度传感器TH2、 第三温度传感器TH3、模数转换模块10、微控制单元20、第一偏置电路31、第二偏置电路32、第一无源滤波器41和第二无源滤波器42之外，新能源车车载充电装置的温度检测电路还可以包括第一电磁干扰滤波器51和第二电磁干扰滤波器52。第一电磁干扰滤波器51可以设置于所述第一偏置电路31与所述第一温度传感器TH1之间的线路上，用于滤除所述第一模拟量温度信号中的电磁干扰；第二电磁干扰滤波器52可以设置于所述第二偏置电路32与所述第二温度传感器TH2之间的线路上，用于滤除所述第二模拟量温度信号中的电磁干扰。
结合图8所示，在一些实施例中第一电磁干扰滤波器51可以包括第一π滤波器51a、第一磁珠FB3、第二π滤波器51b和第二磁珠FB5；第一π滤波器51a由电容C9、电容C10和磁珠FB4组成；第二π滤波器51b由电容C11、电容C12和磁珠FB6组成。所述第一π滤波器51a的输入端与所述第一温度传感器TH1的一端连接，所述第一π滤波器51a的输出端与所述第一磁珠FB3的一端连接，所述第一磁珠FB3的另一端与所述第一偏置电路31的输入端连接；所述第二π滤波器51b的输入端与所述第一温度传感器TH1的另一端连接，所述第二π滤波器51b的输出端与所述第二磁珠FB5的一端连接，所述第二磁珠FB5的另一端与所述第一偏置电路31的输入端连接。
第一π滤波器51a和第二π滤波器51b可以用于滤除所述第一模拟量温度信号中位于截止频率及其以上的电磁干扰。例如，在一示例性实施例中，若第一π滤波器51a和第二π滤波器51b的截止频率均为50Hz时，则第一π滤波器51a和第二π滤波器51b可以滤除掉50Hz及其以上频率的电磁干扰。第一磁珠FB3和第二磁珠FB5可以用于滤除所述第一模拟量温度信号中位于所述截止频率以下的电磁干扰。例如，在一示例性实施例中，以第一π滤波器51a和第二π滤波器51b的截止频率均为50Hz为例，利用第一磁珠FB3和第二磁珠FB5可以滤除掉频率为50Hz以下的电磁干扰。
请继续参考图8所示，第二电磁干扰滤波器52可以包括第三π滤波器52a、第三磁珠FB2、第四π滤波器52b和第四磁珠FB8；第三π滤波器52a由电容C7、电容C8和磁珠FB1组成；第四π滤波器52b由电容C13、电容C14和磁珠FB7组成。所述第三π滤波器52a的输入端与所述第二温度传感器TH2的一端连接，所述第三π滤波器52a的输出端与所述第三磁珠FB2的一端连接，所述第三磁珠FB2的另一端与所述第二偏置电路32的输入端连接；所述第四π滤波器52b的输入端与所述第二温度传感器TH2的另一端连接，所述第四π滤波器52b的输出端与所述第四磁珠FB8的一端连接，所述第四磁珠FB8的另一端与所述第二偏置电路32的输入端连接。
所述第三π滤波器52a和所述第四π滤波器52b，用于滤除所述第二模拟量温度信号中位于截止频率及其以上的电磁干扰；所述第三磁珠FB2和所述第四磁珠FB8，用于滤除所述第二模拟量温度信号中位于所述截止频率以下的电磁干扰。在其他实施例中，根据实际需要，第一磁珠FB3、第二磁珠FB5、第三磁珠FB2和第四磁珠FB8也可以替换为电感。
参考图9所示，在一些实施例中，除了第一温度传感器TH1、第二温度传感器TH2、第三温度传感器TH3、模数转换模块10、微控制单元20、第一偏置电路31、第二偏置电路32、第一无源滤波器41、第二无源滤波器42、第一电磁干扰滤波器51和第二电磁干扰滤波器52之外，新能源车车载充电装置的温度检测电路还可以包括匹配网络60。匹配网络60可以设置于所述模数转换模块10与所述微控制单元20之间的线路上，用于对所述第一数字量温度信号和所述第二数字量温度信号进行限流控制和阻抗匹配控制；所述限流控制用于使所述第一数字量温度信号和所述第二数字量温度信号的电流值位于所述微控制单元20的允许范围，所述阻抗匹配控制用于使所述第一数字量温度信号和所述第二数字量温度信号的完整地传输给所述微控制单元20，即防止模数转换模块10向微控制单元20输出的第一数字量温度信号和第二数字量温度信号产生信号反射波，避免第一数字量温度信号和第二数字量温度信号不完整地传输给微控制单元20。
结合图10所示，在一些实施例中，匹配网络60可以包括电阻R1、电阻R2、电阻R3和电阻R5。其中，电阻R1的一端与A/D芯片U1的DOUT/DRDY引脚相连，电阻R1的另一端与微控制单元20连接；电阻R2的一端与A/D芯片U1的DIN引脚相连，电阻R2的另一端与微控制单元20连接；电阻R3的一端与A/D芯片U1的SCLK引脚相连，电阻R3的另一端与微控制单元20连接；电阻R3的一端与A/D芯片U1的CS_引脚相连，电阻R4的另一端与微控制单元20连接。
为了描述的方便，描述以上装置时以功能分为各种单元分别描述。当然，在实施本说明书时可以把各单元的功能在同一个或多个软件和/或硬件中实现。
与上述的新能源车车载充电装置的温度检测电路对应，本说明书实施例还提供了一种新能源车车载充电装置，所述新能源车车载充电装置配置有上述的温度检测电路。在一些实施例中，所述新能源车车载充电装置例如可以包括但不限于新能源车载充电座等。
与上述的新能源车车载充电装置对应，本说明书实施例还提供了一种新能源车，所述新能源车配置有上述的新能源车车载充电装置。
与上述的新能源车车载充电装置的温度检测电路对应，本说明书实施例还提供了一 种新能源车车载充电装置的温度检测方法，其可以应用于上述的新能源车车载充电装置的温度检测电路侧，参考图11所示，在一些实施例中，所述新能源车车载充电装置的温度检测方法可以包括以下步骤：
S111、采集正极连接端子的第一模拟量温度信号，负极连接端子的第二模拟量温度信号，以及所述新能源车车载充电装置的模拟量环境温度信号。
新能源车车载充电装置的温度检测电路可以利用其第一温度传感器、第二温度传感器和第三温度传感器，对应采集第一模拟量温度信号、第二模拟量温度信号和模拟量环境温度信号。
S112、将所述第一模拟量温度信号、所述第二模拟量温度信号和所述模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环境温度信号。
新能源车车载充电装置的温度检测电路可以利用其模数转换模块，将所述第一模拟量温度信号、所述第二模拟量温度信号和所述模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环境温度信号。
S113、根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正。
新能源车车载充电装置的温度检测电路可以利用其微控制单元，执行根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正的步骤。
在本说明书实施例的温度检测方法中，根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正是指：根据数字量环境温度信号对第一数字量温度信号进行校正，以及根据数字量环境温度信号对第二数字量温度信号进行校正。如此，可以获得考虑环境温度影响下的正极连接端子充电温度、负极连接端子充电温度，从而可以获得更加准确的新能源车车载充电装置的充电温度。
在一些温度检测方法实施例中，所述根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正，可以包括：
根据公式f(x 1)＝x 1×(1+τx 1)/(1+ax 1)对所述第一数字量温度信号进行校正；以及，根据公式f(x 2)＝x 2×(1+τx 2)/(1+ax 2)对所述第二数字量温度信号进行校正。其中，x 1为第一数字量温度信号，x 2为第二数字量温度信号，f(x 1)为校正后第一数字量温度信号，f(x 2)为校正后第二数字量温度信号，τ为时间常数，a为温度补偿系数，且a＝(k 1×z+b 1)×τ+(k 2×z+b 2)，k 1和b 1分别为指定电流下从下限温度升温一度时，两温度 点对应直线的斜率和截距，k 2和b 2分别为指定电流下从上限温度升温一度时，两温度点对应直线的斜率和截距。
本说明书实施例的温度检测方法可以根据数字量环境温度信号对正极连接端子处的第一数字量温度信号进行校正，以及根据数字量环境温度信号对负极连接端子处的第二数字量温度信号进行校正。如此，可以获得考虑环境温度影响下的正极连接端子充电温度、负极连接端子充电温度，从而可以获得更加准确的新能源车车载充电装置的充电温度，进而有利于提高新能源车车载充电装置的充电安全和充电效率。
本说明书的实施例还提供一种计算机设备。如图12所示，在本说明书一些实施例中，所述计算机设备1202可以包括一个或多个处理器1204，诸如一个或多个中央处理单元(CPU)或图形处理器(GPU)，每个处理单元可以实现一个或多个硬件线程。计算机设备1202还可以包括任何存储器1206，其用于存储诸如代码、设置、数据等之类的任何种类的信息，一具体实施例中，存储器1206上并可在处理器1204上运行的计算机程序，所述计算机程序被所述处理器1204运行时，可以执行上述任一实施例所述的新能源车车载充电装置的温度检测方法的指令。非限制性的，比如，存储器1206可以包括以下任一项或多种组合：任何类型的RAM，任何类型的ROM，闪存设备，硬盘，光盘等。更一般地，任何存储器都可以使用任何技术来存储信息。进一步地，任何存储器可以提供信息的易失性或非易失性保留。进一步地，任何存储器可以表示计算机设备1202的固定或可移除部件。在一种情况下，当处理器1204执行被存储在任何存储器或存储器的组合中的相关联的指令时，计算机设备1202可以执行相关联指令的任一操作。计算机设备1202还包括用于与任何存储器交互的一个或多个驱动机构1208，诸如硬盘驱动机构、光盘驱动机构等。
计算机设备1202还可以包括输入/输出接口1210(I/O)，其用于接收各种输入(经由输入设备1212)和用于提供各种输出(经由输出设备1214)。一个具体输出机构可以包括呈现设备1216和相关联的图形用户接口1218(GUI)。在其他实施例中，还可以不包括输入/输出接口1210(I/O)、输入设备1212以及输出设备1214，仅作为网络中的一台计算机设备。计算机设备1202还可以包括一个或多个网络接口1220，其用于经由一个或多个通信链路1222与其他设备交换数据。一个或多个通信总线1224将上文所描述的部件耦合在一起。
通信链路1222可以以任何方式实现，例如，通过局域网、广域网(例如，因特网)、点对点连接等、或其任何组合。通信链路1222可以包括由任何协议或协议组合支配的硬 连线链路、无线链路、路由器、网关功能、名称服务器等的任何组合。
本申请是参照本说明书一些实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理器的处理器以产生一个机器，使得通过计算机或其他可编程数据处理器的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理器以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理器上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
在一个典型的配置中，计算机设备包括一个或多个处理器(CPU)、输入/输出接口、网络接口和内存。
内存可能包括计算机可读介质中的非永久性存储器，随机存取存储器(RAM)和/或非易失性内存等形式，如只读存储器(ROM)或闪存(flash RAM)。内存是计算机可读介质的示例。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括，但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带，磁盘存储或其他磁性存储设备或任何其他非传输介质，可用于存储可以被计算机设备访问的信息。按照本说明书中的界定，计算机可读介质不包括暂存电脑可读媒体(transitory media)，如调制的数据信号和载波。
本领域技术人员应明白，本说明书的实施例可提供为方法、系统或计算机程序产品。因此，本说明书实施例可采用完全硬件实施例、完全软件实施例或结合软件和硬件方面的实施例的形式。而且，本说明书实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本说明书实施例可以在由计算机执行的计算机可执行指令的一般上下文中描述，例如程序模块。一般地，程序模块包括执行特定任务或实现特定抽象数据类型的例程、程序、对象、组件、数据结构等等。也可以在分布式计算环境中实践本说明书实施例，在这些分布式计算环境中，由通过通信网络而被连接的远程处理器来执行任务。在分布式计算环境中，程序模块可以位于包括存储设备在内的本地和远程计算机存储介质中。
还应理解，在本发明实施例中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本发明中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其对于设新能源车车载充电装置实施例、新能源车实施例和新能源车车载充电装置的温度检测方法实施例等而言，由于其核心改进部分基本相似于温度检测电路实施例，所以描述的比较简单，相关之处参见温度检测电路实施例的部分说明即可。
在本发明的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明实施例的至少一个实施例或示例中。在本发明中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本发明中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (23)

  1. 一种新能源车车载充电装置的温度检测电路，其特征在于，包括：
    第一温度传感器，设置于新能源车车载充电装置的正极连接端子处，用于采集所述正极连接端子的第一模拟量温度信号；
    第二温度传感器，设置于新能源车车载充电装置的负极连接端子处，用于采集所述负极连接端子的第二模拟量温度信号；
    第三温度传感器，设置于新能源车车载充电装置壳体内，用于采集所述新能源车车载充电装置的模拟量环境温度信号；
    模数转换模块，用于将所述第一模拟量温度信号、所述第二模拟量温度信号和所述模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环境温度信号；
    微控制单元，用于根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正。
  2. 如权利要求1所述的新能源车车载充电装置的温度检测电路，其特征在于，所述模数转换模块集成于所述微控制单元中。
  3. 如权利要求1所述的新能源车车载充电装置的温度检测电路，其特征在于，所述根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正，包括：
    根据公式f(x 1)＝x 1×(1+τx 1)/(1+ax 1)对所述第一数字量温度信号进行校正；以及，根据公式f(x 2)＝x 2×(1+τx 2)/(1+ax 2)对所述第二数字量温度信号进行校正；
    其中，x 1为第一数字量温度信号，x 2为第二数字量温度信号，f(x 1)为校正后第一数字量温度信号，f(x 2)为校正后第二数字量温度信号，τ为时间常数，a为温度补偿系数，且a＝(k 1×z+b 1)×τ+(k 2×z+b 2)，k 1和b 1分别为指定电流下从下限温度升温一度时，两温度点对应直线的斜率和截距，k 2和b 2分别为指定电流下从上限温度升温一度时，两温度点对应直线的斜率和截距。
  4. 如权利要求1所述的新能源车车载充电装置的温度检测电路，其特征在于，所述温度检测电路还包括：
    第一偏置电路，设置于所述第一温度传感器与所述模数转换模块之间的线路上，用于将所述第一温度传感器的共模电压设置在所述第一温度传感器的指定电压范围，并检测所述第一温度传感器是否出现开路故障；
    第二偏置电路，设置于所述第二温度传感器与所述模数转换模块之间的线路上，用于将所述第二温度传感器的共模电压设置在所述第二温度传感器的指定电压范围，并检测所述第二温度传感器是否出现开路故障。
  5. 如权利要求4所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第一偏置电路包括第一弱上拉电阻和第一弱下拉电阻；
    所述第一弱上拉电阻的一端与所述第一温度传感器的一端连接，所述第一弱上拉电阻的另一端连接直流电源；
    所述第一弱下拉电阻的一端与所述第一温度传感器的另一端连接，所述第一弱下拉电阻的另一端接地。
  6. 如权利要求4所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第二偏置电路包括第二弱上拉电阻和第二弱下拉电阻；
    所述第二弱上拉电阻的一端与所述第二温度传感器的一端连接，所述第二弱上拉电阻的另一端连接直流电源；
    所述第二弱下拉电阻的一端与所述第二温度传感器的另一端连接，所述第二弱下拉电阻的另一端接地。
  7. 如权利要求4所述的新能源车车载充电装置的温度检测电路，其特征在于，所述温度检测电路还包括：
    第一无源滤波器，设置于所述第一偏置电路与所述模数转换模块之间的线路上，用于抑制所述第一模拟量温度信号中的混叠失真及高频噪声；
    第二无源滤波器，设置于所述第二偏置电路与所述模数转换模块之间的线路上，用于抑制所述第二模拟量温度信号中的混叠失真及高频噪声。
  8. 如权利要求7所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第一无源滤波器包括第一一阶RC低通滤波器、第二一阶RC低通滤波器和第一差分电容；
    所述第一差分电容跨接于所述第一一阶RC低通滤波器的输出端及所述第二一阶RC低通滤波器的输出端之间；所述第一一阶RC低通滤波器的输入端及所述第二一阶RC低通滤波器的输入端，与所述第一偏置电路的输出端连接。
  9. 如权利要求7所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第二无源滤波器包括第三一阶RC低通滤波器、第四一阶RC低通滤波器和第二差分电容；
    所述第二差分电容跨接于所述第三一阶RC低通滤波器的输出端及所述第四一阶RC低通滤波器的输出端之间；所述第三一阶RC低通滤波器的输入端及所述第四一阶RC低通滤波器的输入端，与所述第二偏置电路的输出端连接。
  10. 如权利要求4所述的新能源车车载充电装置的温度检测电路，其特征在于，所述温度检测电路，还包括：
    第一电磁干扰滤波器，设置于所述第一偏置电路与所述第一温度传感器之间的线路上，用于滤除所述第一模拟量温度信号中的电磁干扰；
    第二电磁干扰滤波器，设置于所述第二偏置电路与所述第二温度传感器之间的线路上，用于滤除所述第二模拟量温度信号中的电磁干扰。
  11. 如权利要求10所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第一电磁干扰滤波器包括第一π滤波器、第一磁珠、第二π滤波器和第二磁珠；
    所述第一π滤波器和所述第二π滤波器，用于滤除所述第一模拟量温度信号中位于截止频率及其以上的电磁干扰；
    所述第一磁珠和所述第二磁珠，用于滤除所述第一模拟量温度信号中位于所述截止频率以下的电磁干扰；
    所述第一π滤波器的输入端与所述第一温度传感器的一端连接，所述第一π滤波器的输出端与所述第一磁珠的一端连接，所述第一磁珠的另一端与所述第一偏置电路的输入端连接；
    所述第二π滤波器的输入端与所述第一温度传感器的另一端连接，所述第二π滤波器的输出端与所述第二磁珠的一端连接，所述第二磁珠的另一端与所述第一偏置电路的输入端连接。
  12. 如权利要求10所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第二电磁干扰滤波器包括第三π滤波器、第三磁珠、第四π滤波器和第四磁珠；
    所述第三π滤波器和所述第四π滤波器，用于滤除所述第二模拟量温度信号中位于截止频率及其以上的电磁干扰；
    所述第三磁珠和所述第四磁珠，用于滤除所述第二模拟量温度信号中位于所述截止频率以下的电磁干扰；
    所述第三π滤波器的输入端与所述第二温度传感器的一端连接，所述第三π滤波器的输出端与所述第三磁珠的一端连接，所述第三磁珠的另一端与所述第二偏置电路的输入端连接；
    所述第四π滤波器的输入端与所述第二温度传感器的另一端连接，所述第四π滤波器的输出端与所述第四磁珠的一端连接，所述第四磁珠的另一端与所述第二偏置电路的输入端连接。
  13. 如权利要求1所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第三温度传感器的一端通过上拉电阻接直流电源，所述第三温度传感器与所述上拉电阻之间的连接点作为所述第三温度传感器的输出端，所述第三温度传感器的另一端接地。
  14. 如权利要求1所述的新能源车车载充电装置的温度检测电路，其特征在于，所述温度检测电路还包括：
    匹配网络，设置于所述模数转换模块与所述微控制单元之间的线路上，用于对所述第一数字量温度信号和所述第二数字量温度信号进行限流控制和阻抗匹配控制；所述限流控制用于使所述第一数字量温度信号和所述第二数字量温度信号的电流值位于所述微控制单元的允许范围，所述阻抗匹配控制用于使所述第一数字量温度信号和所述第二数字量温度信号的完整地传输给所述微控制单元。
  15. 如权利要求1所述的新能源车车载充电装置的温度检测电路，其特征在于，所述第一温度传感器、所述第二温度传感器和所述第三温度传感器包括热电偶或热电阻。
  16. 如权利要求15所述的新能源车车载充电装置的温度检测电路，其特征在于，所述热电阻包括NTC热敏电阻或PTC热敏电阻。
  17. 一种新能源车车载充电装置，其特征在于，所述新能源车车载充电装置配置有权利要求1-16任意一项所述的温度检测电路。
  18. 如权利要求17所述的新能源车车载充电装置，其特征在于，所述新能源车车载充电装置包括新能源车载充电座。
  19. 一种新能源车，其特征在于，所述新能源车配置有权利要求17或18所述的新能源车车载充电装置。
  20. 一种新能源车车载充电装置的温度检测方法，其特征在于，包括：
    采集正极连接端子的第一模拟量温度信号，负极连接端子的第二模拟量温度信号，以及所述新能源车车载充电装置的模拟量环境温度信号；
    将所述第一模拟量温度信号、所述第二模拟量温度信号和所述模拟量环境温度信号对应转换为第一数字量温度信号、第二数字量温度信号和数字量环境温度信号；
    根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度 信号进行校正。
  21. 如权利要求20所述的温度检测方法，其特征在于，所述根据所述数字量环境温度信号对所述第一数字量温度信号和所述第二数字量温度信号进行校正，包括：
    根据公式f(x 1)＝x 1×(1+τx 1)/(1+ax 1)对所述第一数字量温度信号进行校正；以及，根据公式f(x 2)＝x 2×(1+τx 2)/(1+ax 2)对所述第二数字量温度信号进行校正；
    其中，x 1为第一数字量温度信号，x 2为第二数字量温度信号，f(x 1)为校正后第一数字量温度信号，f(x 2)为校正后第二数字量温度信号，τ为时间常数，a为温度补偿系数，且a＝(k 1×z+b 1)×τ+(k 2×z+b 2)，k 1和b 1分别为指定电流下从下限温度升温一度时，两温度点对应直线的斜率和截距，k 2和b 2分别为指定电流下从上限温度升温一度时，两温度点对应直线的斜率和截距。
  22. 一种计算机设备，包括存储器、处理器、以及存储在所述存储器上的计算机程序，其特征在于，所述计算机程序被所述处理器运行时，执行根据权利要求20或21所述方法的指令。
  23. 一种计算机存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被计算机设备的处理器运行时，执行根据权利要求20或21所述方法的指令。
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