Charging pile temperature monitoring circuit

Abstract

The utility model relates to a temperature monitoring circuit for a charging pile. The temperature monitoring circuit comprises a main control module, a temperature acquisition module, a fan signal detection module, a fan rotating speed control module, a smoke alarm module, a fire extinguishing device feedback module and a communication module, the temperature acquisition module is used for being connected to each detection point of the charging pile so as to detect the temperature of each detection point, the fan signal detection module and the fan rotating speed control module are used for being connected with an external fan and used for acquiring fan signals and controlling the rotating speed of the fan, and the smoke alarm module is used for being connected with an external smoke alarm. The fire extinguishing device feedback module is used for connecting an external fire extinguishing device, and the communication module is used for establishing communication between the main control module and external equipment. The charging pile temperature detection circuit is used for being arranged in the charging pile, the temperature of each electrical connection point in the charging pile is detected through the temperature acquisition module, and the fan rotating speed control module and the fan signal detection module can be used for controlling the rotating speed of the fan for cooling.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circuit, more specifically, it relates to a charging pile temperature monitoring circuit. BACKGROUND

[0002] Under the background of global energy crisis and environmental crisis, the government of our country actively promotes the application and development of new energy vehicles, and the charging pile, as an important supporting infrastructure for the development of electric vehicles, has very important social and economic benefits. Because of large power, electric vehicle charging piles will produce high temperature, and if a fire occurs, it will cause a large property loss, therefore, how to monitor the temperature of the charging pile is the technical problem to be solved by the present application. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a charging pile temperature monitoring circuit, which is arranged in the charging pile to detect the temperature of each node in the charging pile, so as to detect the temperature and control the fan cooling and generate fire alarm, autonomous fire extinguishing and other actions.

[0004] The technical scheme of the utility model is as follows:

[0005] A charging pile temperature monitoring circuit comprises a main control module, and temperature acquisition modules, fan signal detection modules, fan speed control modules, smoke alarm modules, fire extinguishing device feedback modules and communication modules connected to the main control module respectively;

[0006] The temperature acquisition module is used to connect to each detection point of the charging pile, so as to detect the temperature of each detection point, the fan signal detection module and the fan speed control module are used to connect the external fan, and are used to acquire the fan signal and control the speed of the fan, the smoke alarm module is used to connect the external smoke alarm, the fire extinguishing device feedback module is used to connect the external fire extinguishing device, and the communication module is used to establish communication between the main control module and the external device.

[0007] In summary, the above technical scheme has the following beneficial effects: the charging pile temperature detection circuit of the present application is arranged in the charging pile, the temperature acquisition module detects the temperature at each electrical connection point in the charging pile, when the main control module determines that the temperature exceeds the preset temperature, the fan speed control module and the fan signal detection module can control the speed of the fan to cool down. When the charging pile catches fire, the main control module can detect the fire through the smoke alarm module and control the external smoke alarm to alarm, and control the external fire extinguishing device to extinguish the fire autonomously through the fire extinguishing device feedback module. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a connection diagram of a charging pile temperature monitoring circuit;

[0009] Figure 2 This is a schematic diagram of a temperature acquisition module for a charging pile temperature monitoring circuit.

[0010] Figure 3 This is a schematic diagram of a detection unit in a charging pile temperature monitoring circuit;

[0011] Figure 4 A schematic diagram of a fan signal detection module for a charging pile temperature monitoring circuit;

[0012] Figure 5 A schematic diagram of a motor drive chip U5 for a charging pile temperature monitoring circuit;

[0013] Figure 6 A schematic diagram of an optical isolator U8 for a charging pile temperature monitoring circuit;

[0014] Figure 7 A schematic diagram of a smoke alarm module for a charging pile temperature monitoring circuit;

[0015] Figure 8 This is a schematic diagram of a fire extinguishing device feedback module for a charging pile temperature monitoring circuit.

[0016] Figure 9 This is a schematic diagram of a communication module for a charging pile temperature monitoring circuit.

[0017] Figure 10 A schematic diagram of a water immersion detection module for a charging pile temperature monitoring circuit;

[0018] Figure Labels

[0019] 10. Main control module; 20. Temperature acquisition module; 30. Detection unit; 31. Detection capacitor; 32. First detection resistor; 33. Second detection resistor; 34. Detection protection tube; 40. Fan signal detection module; 50. Fan speed control module; 60. Smoke alarm module; 70. Fire extinguishing device feedback module; 80. Communication module; 90. Water immersion detection module. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0021] like Figure 1As shown, a charging pile temperature monitoring circuit includes a master control module 10, and temperature acquisition module 20, fan signal detection module 40, fan speed control module 50, smoke alarm module 60, fire extinguishing device feedback module 70 and communication module 80 connected to the master control module 10 respectively; the temperature acquisition module 20 is used to connect to each detection point of the charging pile, so as to detect the temperature of each detection point, the fan signal detection module 40 and the fan speed control module 50 are used to connect the external fan, for collecting the fan signal and controlling the speed of the fan, the smoke alarm module 60 is used to connect the external smoke alarm, the fire extinguishing device feedback module 70 is used to connect the external fire extinguishing device, and the communication module 80 is used for the master control module 10 and the external device to establish communication. The charging pile temperature detection circuit of the application is used to be arranged in the charging pile, the temperature of each electrical connection point in the charging pile is detected by the temperature acquisition module 20, when the master control module 10 judges that the temperature exceeds the preset temperature, the fan speed control module 50 and the fan signal detection module 40 can be used to control the speed of the fan to cool down. When the charging pile is on fire, the master control module 10 can detect the fire through the smoke alarm module 60 and control the external smoke alarm to alarm, and control the external fire extinguishing device to extinguish the fire independently through the fire extinguishing device feedback module 70.

[0022] As Figure 2 shown, the temperature acquisition module 20 includes a temperature acquisition chip U2, the first pin of the temperature acquisition chip U2 is connected to a 3.3V power supply, the second pin is connected to the first pin of the master control module 10, the third pin is connected to the master control module 10, the fourth pin is connected to the master control module 10, the fifth pin is connected to the master control module 10, the sixth pin is grounded through a resistor R2, the seventh pin is grounded, and the eighth pin to the twenty-third pin is connected to one detection unit 30 respectively, and the twenty-fourth pin is connected to the master control module 10. Specifically, the master control module 10 is a microcontroller U23 with a model of HC32F460KCTA, which can also be replaced by other controllers with control function, in the embodiment of the application, the second pin of the temperature acquisition chip U2 is connected to the first pin of the master control module 10, the third pin is connected to the second pin of the microcontroller U23, the fourth pin is connected to the fourteenth pin of the microcontroller U23, the fifth pin is connected to the fifteenth pin of the microcontroller U23, the twenty-fourth pin is connected to the sixteenth pin of the controller U23, and the pins connected to the microcontroller U23 can be freely selected according to the actual situation.

[0023] As Figure 3As shown, each detection unit 30 includes a detection capacitor 31, a first detection resistor 32, a second detection resistor 33 and a detection protection tube 34; the first end of the first detection resistor 32 is used to connect the temperature collection module 20, and the second end is used to connect the charging pile detection point; the first end of the detection capacitor 31 is connected with the first detection resistor 32, and the second end is grounded; the first end of the detection protection tube 34 is connected with the first detection resistor 32, and the second end is grounded; the first end of the second detection resistor 33 is connected with the first detection resistor 32, and the second end is grounded. The eighth pin to the twenty-third pin of the temperature collection chip U2 can be connected with sixteen detection units 30. Taking the eighth pin connected with the temperature collection chip U2 as an example, the detection protection tube 34 is an ESD static protection tube. The detection units 30 can also directly connect the detection points of the charging pile through the main control module 10 to detect the charging pile, and the temperature collection chip U2 increases the detection quantity of the main control module 10.

[0024] As Figure 4As shown, the fan signal detection module 40 includes an optocoupler U6, the first pin of the optocoupler U6 is connected to the first end of the resistor R14, the second end of the resistor R14 is respectively connected to the first end of the resistor R9 and the external fan signal end, the second pin of the optocoupler U6 is grounded, the second end of the resistor R9 is connected to the 5V power supply; the third pin of the optocoupler U6 is connected to the first end of the resistor R15, the second end of the resistor R15 is respectively connected to the first end of the resistor R10 and the external fan signal end, the fourth pin of the optocoupler U6 is grounded, the second end of the resistor R10 is connected to the 5V power supply; the fifth pin of the optocoupler U6 is connected to the first end of the resistor R17, the second end of the resistor R17 is connected to the first end of the resistor R13 and the external fan signal end, the sixth pin of the optocoupler U6 is grounded, the second end of the resistor R13 is connected to the 5V power supply; the seventh pin of the optocoupler U6 is connected to the 5V power supply through the resistor R50, the eighth pin of the optocoupler U6 is used to be connected to the external fan power end; the ninth pin of the optocoupler U6 is grounded, the tenth pin of the optocoupler U6 is respectively connected to the first end of the resistor R4 and the main control module 10, the second end of the resistor R4 is connected to the 3.3V power supply; the eleventh pin of the optocoupler U6 is grounded, the twelfth pin of the optocoupler U6 is respectively connected to the first end of the resistor R3 and the main control module 10, the second end of the resistor R3 is connected to the 3.3V power supply; the thirteenth pin of the optocoupler U6 is grounded, the fourteenth pin of the optocoupler U6 is respectively connected to the first end of the resistor R1 and the main control module 10, the second end of the resistor R1 is connected to the 3.3V power supply; the fifteenth pin of the optocoupler U6 is grounded, the sixteenth pin of the optocoupler U6 is respectively connected to the first end of the resistor R49 and the main control module 10, the second end of the resistor R49 is connected to the 3.3V power supply. Specifically, in the embodiment, the tenth pin of the optocoupler U6 is connected to the thirty-fourth pin of the main control module 10, the twelfth pin is connected to the twenty-fifth pin of the main control module 10, the fourteenth pin is connected to the twenty-third pin of the main control module 10, and the sixteenth pin is connected to the twenty-first pin of the main control module 10. The model of the optocoupler U6 is ELQ3H7(ta), the fan signal detection module 40 and the fan speed control module 50 are both provided with 5V voltage by the DC-DC power module with the model of b0505s-1wr3, the fan signal end is the RD signal, and its function is to output low level when the fan is running and output high level when the fan is not running, and the CPU can know whether the fan is running normally by detecting the signal.

[0025] As Figure 5 and Figure 6As shown, the fan speed control module 50 includes a motor drive chip U5 and an optical isolator U8, the first pin of the motor drive chip U5 is connected to a 5V power supply, the second pin is connected to the outer wall fan OUT end, the third pin is connected to the external fan speed control end, the fourth pin is grounded, the fifth pin is connected to the fifth pin of the optical isolator U8, the sixth pin and the seventh pin are commonly connected to the first end of the resistor R12, and the eighth pin and the second end of the resistor R12 are commonly connected to the 5V power supply; the first end of the optical isolator U8 is connected to the main control module 10 through the resistor R20, the third pin and the fourth pin are grounded, the fifth pin is connected to the first end of the resistor R21, and the sixth pin and the second end of the resistor R21 are commonly connected to the 5V power supply. Specifically, the first end of the optical isolator U8 is connected to the twenty-fourth pin of the main control module 10 through the resistor R20. The model of the optical isolator U8 is ELM600(TA), and the model of the motor drive chip U5 is BDR6122T.

[0026] As shown in Figure 7 , the smoke alarm module 60 includes a photoelectric coupler U26, the first pin of the photoelectric coupler U26 is connected to a 3.3V power supply through a resistor R233, the second pin is connected to the COM end and the first end of the ESD static protection tube D10 respectively, the third pin is grounded, and the fourth pin is connected to the first end of the resistor R232 and the main control module 10 respectively; the second end of the ESD static protection tube D10 is grounded, and the second end of the resistor R232 is connected to the 3.3V power supply. Specifically, the fourth pin of the photoelectric coupler U26 is connected to the forty-fifth pin of the main control module 10. The model of the photoelectric coupler U26 is el357n(b)(ta)-g, and the main control module 10 generates an alarm signal after detecting a fire through the smoke alarm, and transmits it to the alarm device connected to the main control module 10.

[0027] As shown in Figure 8 , the fire extinguishing device feedback module 70 includes a photoelectric coupler U27, the first pin of the photoelectric coupler U27 is connected to a 3.3V power supply through a resistor R236, the second pin is connected to the COM end and the first end of the ESD static protection tube D11 respectively, the third pin is grounded, and the fourth pin is connected to the first end of the resistor R235 and the main control module 10 respectively; the second end of the ESD static protection tube D11 is grounded, and the second end of the resistor R235 is connected to the 3.3V power supply. Specifically, the fourth pin of the photoelectric coupler U27 is connected to the twenty-second pin of the main control module 10. The main control module 10 generates a fire extinguishing signal after detecting a fire through the fire extinguishing device feedback module 70, and transmits it to the fire extinguishing device connected to the main control module 10.

[0028] As shown in Figure 9As shown in the figure, the communication module 80 comprises a transceiver U11, the first pin of the transceiver U11 is connected to the first end of the resistor R29 and the master control module 10 respectively, the second pin and the third pin are commonly connected to the collector of the transistor Q4, the fourth pin is connected to the master control module 10, the fifth pin is grounded, the sixth pin is connected to the first end of the resistor R38, the resistor R35, the resistor R37, the transient suppression diode D6 and the transient suppression diode D5 respectively, the seventh pin is connected to the second end of the resistor R35, the first end of the resistor R30, the first end of the resistor R31, the second end of the transient suppression diode D5 and the first end of the transient suppression diode D4 respectively, the eighth pin is connected to the second end of the resistor R29, the first end of the capacitor C35 and the 3.3V power supply respectively; the second end of the capacitor C35 is grounded; the collector of the transistor Q4 is connected to the 3.3V power supply through the resistor R32, the emitter is grounded, and the base is connected to the master control module 10 through the resistor R36; the second end of the resistor R38 is grounded, the second end of the transient suppression diode D6 is grounded, the second end of the resistor R37 is used for connecting an external signal, the second end of the resistor R30 is grounded, the second end of the transient suppression diode D4 is grounded, and the second end of the resistor R31 is used for connecting an external signal. Specifically, the first pin of the transceiver U11 is connected to the twenty-eighth pin of the master control module 10, the fourth pin is connected to the twenty-seventh pin of the master control module 10, and the base of the transistor Q4 is connected to the twenty-seventh pin of the master control module 10 through the resistor R36.

[0029] As shown in the figure, Figure 10 The master control module 10 is also connected with the water immersion detection module 90, the water immersion detection module 90 comprises the capacitor C27, the resistor R19 and the resistor R18, the first end of the resistor R19 is connected to the first end of the capacitor C27 and the master control module 10 respectively, the second end of the resistor R19 is connected to the first end of the resistor R18 and serves as a first water immersion detection point, the first end of the capacitor C17 is grounded and serves as a second water immersion detection point, and the second end of the resistor R18 is connected to the 2.5V power supply. Specifically, the first end of the resistor R19 is connected to the twentieth pin of the master control module 10. The water immersion detection module 90 is used for detecting whether the charging pile contacts the water source, so as to avoid the harm of the water source to the charging pile, such as short circuit.

[0030] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not only limited to the above-mentioned embodiments, and all the technical schemes under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can also be regarded as the protection scope of the utility model.

Claims

1. A temperature monitoring circuit for a charging pile, characterized in that, It includes a main control module (10), and a temperature acquisition module (20), a fan signal detection module (40), a fan speed control module (50), a smoke alarm module (60), a fire extinguishing device feedback module (70) and a communication module (80) respectively connected to the main control module (10); The temperature acquisition module (20) is connected to each detection point of the charging pile through multiple detection units (30) to detect the temperature of each detection point. The fan signal detection module (40) and the fan speed control module (50) are used to connect to an external fan to collect fan signals and control the fan speed. The smoke alarm module (60) is used to connect to an external smoke alarm. The fire extinguishing device feedback module (70) is used to connect to an external fire extinguishing device. The communication module (80) is used to enable the main control module (10) and external devices to establish communication.

2. The charging pile temperature monitoring circuit according to claim 1, characterized in that, The temperature acquisition module (20) includes a temperature acquisition chip U2. The first pin of the temperature acquisition chip U2 is connected to a 3.3V power supply, the second pin is connected to the main control module (10), the third pin is connected to the main control module (10), the fourth pin is connected to the main control module (10), the fifth pin is connected to the main control module (10), the sixth pin is grounded through resistor R2, the seventh pin is grounded, the eighth to twenty-third pins are respectively connected to a detection unit (30), and the twenty-fourth pin is connected to the main control module (10).

3. The charging pile temperature monitoring circuit according to claim 2, characterized in that, Each of the detection units (30) includes a detection capacitor (31), a first detection resistor (32), a second detection resistor (33), and a detection protection tube (34); The first end of the first detection resistor (32) is used to connect to the temperature acquisition module (20), and the second end is used to connect to the charging pile detection point; The first end of the detection capacitor (31) is connected to the first detection resistor (32), and the second end is grounded; The first end of the detection protection tube (34) is connected to the first detection resistor (32), and the second end is grounded; The first end of the second detection resistor (33) is connected to the first detection resistor (32), and the second end is grounded.

4. The charging pile temperature monitoring circuit according to claim 1, characterized in that, The fan signal detection module (40) includes an optocoupler U6. The first pin of the optocoupler U6 is connected to the first end of the resistor R14. The second end of the resistor R14 is connected to the first end of the resistor R9 and the external fan signal terminal, respectively. The second pin of the optocoupler U6 is grounded, and the second end of the resistor R9 is connected to a 5V power supply. The third pin of the optocoupler U6 is connected to the first end of the resistor R15, the second end of the resistor R15 is connected to the first end of the resistor R10 and the external fan signal terminal, the fourth pin of the optocoupler U6 is grounded, and the second end of the resistor R10 is connected to a 5V power supply. The fifth pin of the optocoupler U6 is connected to the first end of the resistor R17, the second end of the resistor R17 is connected to the first end of the resistor R13 and the external fan signal terminal, the sixth pin of the optocoupler U6 is grounded, and the second end of the resistor R13 is connected to a 5V power supply. The seventh pin of the optocoupler U6 is connected to a 5V power supply through a resistor R50, and the eighth pin of the optocoupler U6 is used to connect to the power supply of an external fan. The ninth pin of the optocoupler U6 is grounded, the tenth pin of the optocoupler U6 is connected to the first end of the resistor R4 and the main control module (10) respectively, and the second end of the resistor R4 is connected to the 3.3V power supply. The eleventh pin of the optocoupler U6 is grounded, the twelfth pin of the optocoupler U6 is connected to the first end of the resistor R3 and the main control module (10) respectively, and the second end of the resistor R3 is connected to the 3.3V power supply; The thirteenth pin of the optocoupler U6 is grounded, the fourteenth pin of the optocoupler U6 is connected to the first end of the resistor R1 and the main control module (10) respectively, and the second end of the resistor R1 is connected to the 3.3V power supply; The fifteenth pin of the optocoupler U6 is grounded, the sixteenth pin of the optocoupler U6 is connected to the first end of the resistor R49 and the main control module (10) respectively, and the second end of the resistor R49 is connected to the 3.3V power supply.

5. A charging pile temperature monitoring circuit according to claim 4, characterized in that, The fan speed control module (50) includes a motor drive chip U5 and an optical isolator U8. The first pin of the motor drive chip U5 is connected to a 5V power supply, the second pin is connected to the OUT terminal of the external fan, the third pin is connected to the external fan speed control terminal, the fourth pin is grounded, the fifth pin is connected to the fifth pin of the optical isolator U8, the sixth and seventh pins are connected to the first terminal of the resistor R12, and the eighth pin and the second terminal of the resistor R12 are connected to a 5V power supply. The first end of the optical isolator U8 is connected to the main control module (10) through resistor R20, the third and fourth pins are grounded respectively, the fifth pin is connected to the first end of resistor R21, and the sixth pin and the second end of resistor R21 are connected to the 5V power supply.

6. The charging pile temperature monitoring circuit according to claim 1, characterized in that, The smoke alarm module (60) includes an optocoupler U26. The first pin of the optocoupler U26 is connected to a 3.3V power supply through a resistor R233. The second pin is connected to the COM terminal and the first terminal of the ESD electrostatic protection tube D10 respectively. The third pin is grounded. The fourth pin is connected to the first terminal of the resistor R232 and the main control module (10) respectively. The second terminal of the ESD protection tube D10 is grounded, and the second terminal of the resistor R232 is connected to a 3.3V power supply.

7. The charging pile temperature monitoring circuit according to claim 1, characterized in that, The fire extinguishing device feedback module (70) includes an optocoupler U27. The first pin of the optocoupler U27 is connected to a 3.3V power supply through a resistor R236. The second pin is connected to the COM terminal and the first terminal of the ESD electrostatic protection tube D11 respectively. The third pin is grounded. The fourth pin is connected to the first terminal of the resistor R235 and the main control module (10) respectively. The second terminal of the ESD protection tube D11 is grounded, and the second terminal of the resistor R235 is connected to a 3.3V power supply.

8. The charging pile temperature monitoring circuit according to claim 1, characterized in that, The communication module (80) includes a transceiver U11. The first pin of the transceiver U11 is connected to the first end of resistor R29 and the main control module (10). The second and third pins are connected to the collector of transistor Q4. The fourth pin is connected to the main control module (10). The fifth pin is grounded. The sixth pin is connected to the first ends of resistors R38, R35, R37, transient suppression diode D6, and transient suppression diode D5. The seventh pin is connected to the second end of resistor R35, the first end of resistor R30, the first end of resistor R31, the second end of transient suppression diode D5, and the first end of transient suppression diode D4. The eighth pin is connected to the second end of resistor R29, the first end of capacitor C35, and the 3.3V power supply. The second terminal of capacitor C35 is grounded; The collector of the transistor Q4 is connected to a 3.3V power supply through resistor R32, the emitter is grounded, and the base is connected to the main control module (10) through resistor R36. The second terminal of resistor R38 is grounded, the second terminal of transient suppression diode D6 is grounded, the second terminal of resistor R37 is used to connect to an external signal, the second terminal of resistor R30 is grounded, the second terminal of transient suppression diode D4 is grounded, and the second terminal of resistor R31 is used to connect to an external signal.

9. A charging pile temperature monitoring circuit according to any one of claims 1-8, characterized in that, The main control module (10) is also connected to a water immersion detection module (90). The water immersion detection module (90) includes a capacitor C27, a resistor R19 and a resistor R18. The first end of the resistor R19 is connected to the first end of the capacitor C27 and the main control module (10). The second end of the resistor R19 is connected to the first end of the resistor R18 and serves as the first water immersion detection point. The first end of the capacitor C17 is grounded and serves as the second water immersion detection point. The second end of the resistor R18 is connected to a 2.5V power supply.

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