CN218885146U - Temperature detection circuit with diagnosis function - Google Patents
Temperature detection circuit with diagnosis function Download PDFInfo
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- CN218885146U CN218885146U CN202223013668.9U CN202223013668U CN218885146U CN 218885146 U CN218885146 U CN 218885146U CN 202223013668 U CN202223013668 U CN 202223013668U CN 218885146 U CN218885146 U CN 218885146U
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a temperature detection circuit with a diagnosis function, which comprises a driving unit, a temperature measurement unit and a control unit; the driving unit is connected with an input power supply, and the output end of the driving unit is connected with the power supply end of the temperature measuring unit; the driving unit provides driving voltage for the temperature measuring unit; the temperature measuring unit is used for detecting a battery temperature signal and outputting the battery temperature signal; the control unit is connected with the power end of the temperature measuring unit and used for diagnosing whether the temperature measuring unit is normal or not when the temperature measuring unit works. The battery temperature detection method and the battery temperature detection device can detect the battery temperature, can diagnose the detection result according to the circuit, and improve the reliability of the temperature detection result. In addition, the temperature detection circuit is simple in structure, low in cost and good in detection effect.
Description
Technical Field
The present disclosure relates to battery temperature detection technologies, and particularly to a temperature detection circuit with a diagnostic function.
Background
With the rapid development of the new energy automobile industry. The battery is the core of the electric automobile and is the comprehensive embodiment of automobile engineering and electric power engineering technology. The use range of the battery is limited by the use temperature of the battery, so that the real-time temperature detection of the battery under various working conditions is particularly important.
In a BMS (BATTERY MANAGEMENT SYSTEM ), detection of the surface temperature of a BATTERY in a BATTERY box generally measures the BATTERY temperature based on a change in voltage caused by a change in temperature-sensitive resistance value; in practice, the detected temperature may not be the actual temperature of the battery due to the failure of the temperature detection circuit, so that the temperature detection result is incorrect.
At present, in order to judge a temperature detection loop, generally, a disconnection diagnosis method is adopted and comprises a current source method and a resistance voltage division method, the principles of the current source method and the resistance voltage division method are seemingly simple, and the actual design is complex and troublesome.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a temperature detection circuit with a diagnostic function, which is used to solve the problem of poor reliability of battery temperature measurement in the prior art.
In order to achieve the above and other related objects, the present application provides a temperature detection circuit having a diagnostic function, including a driving unit, a temperature measuring unit, and a control unit;
the driving unit is connected with an input power supply, and the output end of the driving unit is connected with the power supply end of the temperature measuring unit; the driving unit provides driving voltage for the temperature measuring unit;
the temperature measuring unit is used for detecting a battery temperature signal and outputting the battery temperature signal;
the control unit is connected with the power end of the temperature measuring unit and used for diagnosing whether the temperature measuring unit is normal or not when the temperature measuring unit works.
Preferably, the battery temperature monitoring device further comprises a signal processing unit, wherein the signal processing unit is connected with the temperature measuring unit and is used for receiving the battery temperature signal and processing the battery temperature signal.
Preferably, the signal processing unit includes a display module, and the display module is electrically connected to a power end of the temperature measuring unit, and is configured to receive the battery temperature signal output by the temperature measuring unit and display the battery temperature signal.
Preferably, the signal processing unit further comprises a judging module, an input end of the judging module is connected with a power end of the temperature measuring unit, and an output end of the judging module is connected with the display module; the judging module receives the battery temperature signal output by the temperature measuring unit, judges the battery temperature signal and displays the judging result.
Preferably, the display module comprises one or more of: display screen, pilot lamp and electric bell.
Preferably, the driving unit includes a first resistor and a capacitor, one end of the first resistor is connected to the input power supply, the other end of the first resistor is connected to one end of the capacitor, and the other end of the capacitor is grounded; and the connection point of the first resistor and the capacitor is the output end of the driving unit.
Preferably, the temperature measuring unit comprises a temperature-sensitive element, one end of the temperature-sensitive element is connected with the output end of the driving unit, and the other end of the temperature-sensitive element is grounded.
Preferably, the temperature sensitive element is an infrared sensor.
Preferably, the control unit includes a control switch and a second resistor, one end of the control switch is connected to an external power supply, the other end of the control switch is connected to one end of the second resistor, and the other end of the second resistor is connected to the power supply end of the temperature measuring unit.
Preferably, the control switch is a normally open switch.
As described above, the temperature detection circuit with a diagnostic function according to the present application has the following advantageous effects:
the temperature detection circuit with the diagnosis function can detect the temperature of the battery, can diagnose the detection result according to the circuit, and improves the reliability of the temperature detection result. In addition, the temperature detection circuit is simple in structure, low in cost and good in detection effect.
The control unit of this application is through using simple external power supply, has effectively solved the diagnosis to the temperature measurement unit, compares the design that adopts current source method and resistance voltage division method among the prior art, and this application is simple more effective to the diagnostic design of temperature measurement unit for temperature detection efficiency is higher, the cost is lower.
Drawings
Fig. 1 is a schematic circuit diagram of a temperature detection circuit with a diagnostic function according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application.
Please refer to fig. 1. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of each component in actual implementation may be changed freely, and the layout of the components may be more complicated.
In view of the problems in the prior art, the present application provides a temperature detection circuit with a diagnostic function, as shown in fig. 1, including a driving unit, a temperature measuring unit and a control unit;
the driving unit is connected with an input power supply, and the output end of the driving unit is connected with the power supply end of the temperature measuring unit; the driving unit provides driving voltage for the temperature measuring unit;
the temperature measuring unit is used for detecting a battery temperature signal and outputting the battery temperature signal;
the control unit is connected with the power end of the temperature measuring unit and used for diagnosing whether the temperature measuring unit is normal or not when the temperature measuring unit works.
The battery temperature is detected through the driving unit and the temperature measuring unit; meanwhile, the control unit diagnoses the temperature measuring unit to judge whether the temperature measuring unit works normally, so that the reliability of the battery temperature detection result can be improved.
The temperature detection circuit further comprises a signal processing unit, wherein the signal processing unit is connected with the temperature measuring unit and used for receiving the battery temperature signal and processing the battery temperature signal.
The battery temperature signal that temperature measurement unit actually output in this application is the voltage value, and this voltage value and the concrete corresponding relation of battery temperature signal.
The signal processing unit of this application can include the signal acquisition module, gathers the battery temperature signal of temperature measurement unit output through the signal acquisition module. Specifically, as shown in fig. 1, in the embodiment of the present application, the signal processing unit includes a third resistor R3 (internal resistance of the signal acquisition module), one end of the third resistor R3 is connected to the temperature measurement unit, and the other end of the third resistor R3 is grounded. Wherein, the signal acquisition module can be an ADC.
Illustratively, the signal processing unit of the present application further includes a display module, where the display module is electrically connected to the power supply end of the temperature measuring unit, and is configured to receive the battery temperature signal output by the temperature measuring unit, and display the battery temperature signal.
In this application, the display module can be the display, directly shows battery temperature signal, for example, be the magnitude of voltage when the signal processing unit is to the battery temperature signal of receiving, the display can directly show the magnitude of voltage, what obtain after the signal processing unit is handled battery temperature signal is the temperature value, the display can directly show the magnitude of temperature value.
The signal processing unit of the application can further comprise a judging module, wherein the input end of the judging module is connected with the power supply end of the temperature measuring unit, and the output end of the judging module is connected with the display module; the judging module receives the battery temperature signal output by the temperature measuring unit, judges the battery temperature signal and displays the judging result.
The utility model provides a judge module judges the battery temperature signal of temperature measurement unit output, it is concrete, the first battery temperature signal of temperature measurement unit output when carrying out the diagnosis during operation and the second battery temperature signal of temperature measurement unit output when the control unit is carried out the diagnosis during operation to the control unit and carry out the comparison judgement, if first battery temperature signal is the same with second battery temperature signal, then judge that temperature measurement unit is unusual, can not continue to carry out normal temperature measurement work, show through display module this moment, can continue to show battery temperature signal, staff oneself discerns the diagnosis result, as other implementation methods, display module direct display judgement result, whether break down promptly, display module can include pilot lamp or electric bell this moment, can be better through pilot lamp or electric bell alert staff.
Therefore, the display module of the present application includes a display screen, an indicator light or/and an electric bell.
Specifically, as shown in fig. 1, in the embodiment of the present application, the driving unit includes a first resistor R1 and a capacitor C, one end of the first resistor R1 is connected to the input power VCC1, the other end of the first resistor R1 is connected to one end of the capacitor C, and the other end of the capacitor C is grounded; the connection point of the first resistor R1 and the capacitor C is the output end of the driving unit.
According to the temperature measuring unit, the first resistor R1 serves as a pull-up resistor and is connected with the input power VCC1, and the first resistor R1 and the capacitor C divide the voltage of the input power VCC1 and then output driving voltage to the temperature measuring unit.
The driving unit comprises a pull-up resistor (namely a first resistor R1) and a capacitor, and is simple in structure and low in cost; as another embodiment, a circuit structure formed by other electronic components may also be included, and therefore, the driving unit in the present application includes, but is not limited to, a resistor and a capacitor, and is applicable to a circuit structure capable of providing a driving voltage based on an input power source, and the present application is not repeated for other complicated circuit structures.
Specifically, as shown in fig. 1, in the embodiment of the present application, the temperature measuring unit includes a temperature sensitive element NTC, one end of the temperature sensitive element NTC is connected to the output end of the driving unit, and the other end of the temperature sensitive element NTC is grounded.
After the temperature of the battery is detected by the temperature-sensitive element NTC, corresponding resistance can be generated, driving voltage obtained through voltage division of the driving unit is provided for the temperature measuring unit, and resistance signals can be converted to voltage signals to be output. In the embodiment of the present application, the temperature sensitive element NTC is an infrared sensor.
The temperature measuring unit only comprises the temperature sensitive element NTC, and has simple structure and low cost; as other embodiments, the temperature measurement unit may further include a circuit structure formed by other electronic components, and therefore, the temperature measurement unit of the present application includes but is not limited to a temperature sensitive element, and as long as the circuit structure capable of rapidly detecting the battery temperature is applicable, the present application is not repeated for other applicable complex circuit structures.
Specifically, as shown in fig. 1, in this embodiment of the application, the control unit includes a control switch S and a second resistor R2, one end of the control switch S is connected to an external power source VCC2, the other end of the control switch S is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the power end of the temperature measuring unit.
In the embodiment of the present application, the control switch is a normally open switch. When diagnosis is needed, the on-off state of the control switch is controlled to be changed, the control switch is changed from the off state to the on state, and the control unit is electrically connected with the temperature measuring unit.
The control unit of this application is after control switch is closed, will control external power VCC2 and insert temperature detection circuit to give the temperature measurement unit with partly voltage, make the battery temperature signal of temperature measurement unit output change, if the battery temperature signal is unchangeable, still when maintaining the battery temperature signal before the control unit inserts, then judge that the temperature measurement unit appears unusually, consequently, this application can realize the diagnosis to the temperature measurement unit through the control unit.
The control unit of this application has effectively solved the diagnosis to the temperature measurement unit through using simple external power supply VCC2, compares the design that adopts current source method and resistance voltage division method among the prior art, and this application is simple more effective to the diagnostic design of temperature measurement unit for temperature detection efficiency is higher, the cost is lower.
In summary, the application provides a temperature detection circuit with a diagnosis function, compared with the prior art, the temperature detection circuit not only can detect the temperature of a battery, but also can diagnose the detection result according to the circuit, so that the reliability of the temperature detection result is improved, the health condition of the battery can be effectively detected through an accurate temperature detection result, and accidents caused by overhigh temperature of the battery are avoided. In addition, the temperature detection circuit of the application has the advantages of simple structure, low cost and higher detection effect. Therefore, the application effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present disclosure be covered by the claims of the present application.
Claims (10)
1. A temperature detection circuit with a diagnosis function is characterized by comprising a driving unit, a temperature measuring unit and a control unit;
the driving unit is connected with an input power supply, and the output end of the driving unit is connected with the power supply end of the temperature measuring unit; the driving unit provides driving voltage for the temperature measuring unit;
the temperature measuring unit is used for detecting a battery temperature signal and outputting the battery temperature signal;
the control unit is connected with the power end of the temperature measuring unit and used for diagnosing whether the temperature measuring unit is normal or not when the temperature measuring unit works.
2. The temperature detection circuit with the diagnosis function according to claim 1, further comprising a signal processing unit, wherein the signal processing unit is connected to the temperature measurement unit, and the signal processing unit is configured to receive the battery temperature signal and process the battery temperature signal.
3. The temperature detection circuit with the diagnosis function according to claim 2, wherein the signal processing unit comprises a display module, and the display module is electrically connected to the power supply terminal of the temperature measurement unit, and is configured to receive the battery temperature signal output by the temperature measurement unit and display the battery temperature signal.
4. The temperature detection circuit with the diagnosis function according to claim 3, wherein the signal processing unit further comprises a judgment module, an input end of the judgment module is connected with the power supply end of the temperature measurement unit, and an output end of the judgment module is connected with the display module; the judging module receives the battery temperature signal output by the temperature measuring unit, judges the battery temperature signal and displays the judging result.
5. The diagnostic capable temperature detection circuit of claim 4, wherein the display module comprises one or more of:
display screen, pilot lamp and electric bell.
6. The temperature detection circuit with the diagnosis function according to any one of claims 1 to 5, wherein the driving unit comprises a first resistor and a capacitor, one end of the first resistor is connected with an input power supply, the other end of the first resistor is connected with one end of the capacitor, and the other end of the capacitor is grounded; the connection point of the first resistor and the capacitor is the output end of the driving unit.
7. The temperature detection circuit with the diagnosis function according to any one of claims 1 to 5, wherein the temperature measurement unit comprises a temperature sensitive element, one end of the temperature sensitive element is connected to the output end of the driving unit, and the other end of the temperature sensitive element is grounded.
8. The temperature detection circuit with a diagnostic function according to claim 7, characterized in that the temperature sensitive element is an infrared sensor.
9. The temperature detection circuit with the diagnosis function according to any one of claims 1 to 5, wherein the control unit comprises a control switch and a second resistor, one end of the control switch is connected with an external power supply, the other end of the control switch is connected with one end of the second resistor, and the other end of the second resistor is connected with a power supply end of the temperature measurement unit.
10. The temperature detection circuit with diagnostic function of claim 9, wherein the control switch is a normally open switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223013668.9U CN218885146U (en) | 2022-11-11 | 2022-11-11 | Temperature detection circuit with diagnosis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223013668.9U CN218885146U (en) | 2022-11-11 | 2022-11-11 | Temperature detection circuit with diagnosis function |
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| Publication Number | Publication Date |
|---|---|
| CN218885146U true CN218885146U (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223013668.9U Active CN218885146U (en) | 2022-11-11 | 2022-11-11 | Temperature detection circuit with diagnosis function |
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| CN (1) | CN218885146U (en) |
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- 2022-11-11 CN CN202223013668.9U patent/CN218885146U/en active Active
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