Method and apparatus for preventing overheat in vehicle charging

Abstract

The invention relates to a method and device for detecting overheating during charging of a vehicle and the vehicle. The method includes: monitoring a temperature of a plug connected to a power outlet, the power outlet supplying a charging voltage for charging a battery of the vehicle; based on the temperature of the plug, determining an average value of the temperature variation of the plug in unit time; and the charging is cut off in response to the fact that the average value of the temperature variation of the plug in unit time exceeds a preset threshold range.

Description

Technical Field

[0001] The present disclosure relates to a technology for preventing overheating during vehicle charging. Background Art

[0002] An In-Cable Control Box (ICCB) refers to a portable slow charger for charging a Plug-in Hybrid Electric Vehicle (PHEV) or an Electric Vehicle (EV). A user can directly carry the ICCB and charge an eco-friendly vehicle using a household 220V plug by fastening the ICCB to a power socket and the vehicle. Since the user uses the ICCB by directly fastening it to the power socket, various safety function specifications are embedded in the ICCB.

[0003] In the case of fastening the plug to the power socket in an abnormal state of the ICCB or using an extension cord arbitrarily due to a long distance from the power socket, heat is generated due to an increase in contact resistance, and there is a risk of fire.

[0004] Therefore, the ICCB is used to detect abnormalities in the input voltage and detect leakage current, overcurrent, etc. Further, a temperature sensor is embedded in the power plug so that when overheating occurs due to user error and the charging environment, the ICCB is used to send an alarm to the user and cut off the charging. Different temperature sensors are adopted according to the manufacturer of the ICCB. However, a thermistor is generally used to monitor the temperature.

[0005] However, since most ICCB products in the prior art adopt a temperature sensor provided in the plug, the shape of the plug and the structure having the temperature sensor make it difficult for many products to detect sudden overheating.

[0006] On the other hand, due to the entry of foreign matter or the loss of the pulling force and restoring force of the blade holder in an aging power socket, the contact resistance of the ICCB increases, and due to the increase in the contact resistance, a large amount of heat is generated in a short time. Therefore, even if a temperature sensor is applied to the ICCB plug, it is still difficult to immediately prevent a fire due to structural problems. The relationship between the pulling force and the restoring force of the blade holder of the power socket varies according to the equipment manufacturer, and the replacement and inspection cycles of the blade holder are regulated. However, the problem is that the risk of electrical fire increases in direct proportion to the actual service life of the blade holder, and since there is no regulation related to the installation year of the power socket indicated, the replacement cycle cannot be accurately determined.

[0007] Therefore, in this technical field, it is necessary to improve the structure of the ICCB and the overheat detection logic capable of preventing fire due to overheating. Summary of the Invention

[0008] The present disclosure relates to a technology for preventing overheating during vehicle charging. Particular embodiments relate to a method and apparatus for preventing overheating during the charging of a battery of an eco-friendly vehicle.

[0009] Accordingly, embodiments of the present disclosure consider problems arising in the prior art, and embodiments of the present disclosure provide an improved ICCB structure and overheat detection logic capable of preventing fires due to overheating.

[0010] Embodiments of the present disclosure also provide a technology capable of detecting in advance a power outlet that may catch fire.

[0011] The technical problems that can be solved by embodiments of the present disclosure are not limited to the above technical problems, and those skilled in the art to which the present disclosure pertains can clearly understand other technical problems not mentioned above from the following description.

[0012] According to an embodiment, there is provided a method for detecting overheating of vehicle charging, the method including: monitoring a temperature of a plug connected to a power outlet configured to supply a charging voltage for charging a battery of an eco-friendly vehicle; determining, based on the temperature of the plug, an average value of a temperature change of the plug per unit time; and cutting off charging in response to the average value of the temperature change amount per unit time exceeding a preset threshold range.

[0013] In this case, the method for detecting overheating of vehicle charging may further include: initializing a time counter and counting the time counter at a time point when starting to monitor the temperature of the plug.

[0014] In this case, determining the average value of the temperature change amount of the plug per unit time may include: determining whether a value of the time counter exceeds a preset threshold time, and in response to the value of the time counter exceeding the threshold time, determining the average value of the temperature change amount of the plug per unit time based on the temperature of the plug.

[0015] In this case, monitoring the temperature of the plug may include: performing an analog-to-digital conversion on the temperature of the plug at a preset predetermined period, storing the temperature of the plug each time the analog-to-digital conversion is performed, and storing the number of times the analog-to-digital conversion has been performed.

[0016] In this case, determining the average value of the temperature change amount of the plug per unit time may include: accumulating the temperature change amount of the plug to the threshold time at a preset predetermined period; and determining the average value of the temperature change amount of the plug per unit time by dividing the accumulated temperature change amount of the plug by the number of times the analog-to-digital conversion has been performed.

[0017] According to an embodiment, a device for detecting overheating during vehicle charging is provided. The device includes: a processor configured to monitor the temperature of a plug connected to a power socket configured to supply a charging voltage for charging a battery of an eco-friendly vehicle; determine an average value of a temperature change amount of the plug per unit time based on the temperature of the plug; and cut off the charging in response to the average value of the temperature change amount per unit time exceeding a preset threshold range; and a memory configured to store the temperature of the plug.

[0018] In this case, the processor may initialize a time counter at the time point when starting to monitor the temperature of the plug, and the processor may count the time counter.

[0019] In this case, the processor may determine whether the value of the time counter exceeds a preset threshold time, and the processor may determine an average value of a temperature change amount of the plug per unit time based on the temperature of the plug in response to the value of the time counter exceeding the threshold time.

[0020] In this case, the processor may perform analog-to-digital conversion on the temperature of the plug at a preset predetermined period, the processor may store the temperature of the plug each time the analog-to-digital conversion is performed in the memory, and the processor may store the number of times the analog-to-digital conversion has been performed in the memory.

[0021] In this case, the processor may accumulate the temperature change amount of the plug up to the threshold time at a preset predetermined period, and the processor may determine an average value of the temperature change of the plug per unit time by dividing the accumulated temperature change amount of the plug by the number of times the analog-to-digital conversion has been performed.

[0022] The various embodiments of the present disclosure described above provide an improved ICCB structure and overheat detection logic capable of preventing fires due to overheating.

[0023] In addition, a power socket that may catch fire can be detected in advance.

[0024] The effects obtainable by the embodiments of the present disclosure are not limited to the above effects, and those skilled in the art will clearly understand other effects not mentioned above from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shows a charging system of an eco-friendly vehicle according to an embodiment of the present disclosure.

[0026] Figures 2A to 2C Shows an example of power, current, and voltage measured over time at a contact portion between a power socket and a plug in the case of generating an oxide in the charging system in Figure 1 and the charging system.

[0027] Figure 3Shows an example of an isolation integrated circuit (IC) for a charging device that can be used in Figure 1 to prevent fires.

[0028] Figure 4 Shows a method for detecting overheating according to an embodiment of the present disclosure.

[0029] Figure 5 Shows a method for detecting overheating according to another embodiment of the present disclosure.

[0030] Figure 6 Shows an example of a rapid increase in the temperature of a plug due to a fastening defect of a power socket according to an embodiment of the present disclosure.

[0031] Figure 7 Shows a computer system according to an embodiment of the present disclosure. Detailed Description of the Invention

[0032] Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings. Regardless of the reference numerals of the drawings, the same or similar components are given the same reference numerals, and repeated descriptions thereof will be omitted. For ease of description, in the following description, the suffixes “module,” “unit,” “component,” and “section” used to describe components are used together or interchangeably, but the suffixes themselves have no distinguishable meaning or function. In addition, in the description of the exemplary embodiments disclosed in the present specification, when it is determined that a specific description of related known art may obscure the subject matter of the exemplary embodiments disclosed in the present specification, such specific description will be omitted. In addition, it should be interpreted that the accompanying drawings are provided only to enable those skilled in the art to easily understand the embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings and includes all modifications, equivalents, and alternatives included within the spirit and scope of the present disclosure.

[0033] Terms including ordinal numbers such as “first” and “second” may be used to describe various components, but the components are not limited by these terms. These terms are only used to distinguish one component from another.

[0034] When a component is described as “coupled” or “connected” to another component, it should be understood that one component can be directly coupled or connected to another component, and intermediate components may also exist between the components. When a component is described as “directly coupled to” or “directly connected to” another component, it should be understood that there are no intermediate components between the components.

[0035] Unless explicitly described as having a different meaning in the context, singular expressions include plural expressions.

[0036] In the specification, it should be understood that the terms "comprising", "comprises", "including", "includes", "containing", "has", "with" or other variants are open-ended, and thus there is provided the specified feature, integer, step, operation, element, component or combination thereof, without excluding the presence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0037] Figure 1 Shows a charging system for an environment-friendly vehicle according to an embodiment of the present disclosure.

[0038] Referring to Figure 1 , the charging system for the environment-friendly vehicle according to the present embodiment includes a power socket 110, a plug 130, a charging device 150, and a vehicle 170.

[0039] The power socket 110 supplies AC power to an electronic device physically connected to the power socket 110 and the like.

[0040] The plug 130 is connected to one end of a wire connected to the charging device 150 and is physically connected to the power socket 110, such that the plug 130 receives the power required by the charging device 150 from the power socket 110.

[0041] The charging device 150 receives power from the power socket 110 through the plug 130 to charge the vehicle 170.

[0042] In this case, the charging device 150 may be an in-cable control box (ICCB).

[0043] The battery provided in the vehicle 170 is charged by the charging device 150.

[0044] Generally, since moisture is in an electrolyte aqueous solution state to some extent, moisture has the property of an electrical conductor. Therefore, when the humidity is high due to moisture, the resistance component decreases. On the contrary, since foreign substances such as soil have the characteristics of a non-conductor, when there are foreign substances in the power socket 110 or the terminals of the plug 130, the resistance component increases. Therefore, in the case where the blade holder tension of the power socket 110 decreases due to aging of the terminals of the power socket 110 or moisture or foreign substances are introduced due to improper maintenance, the contact resistance between the power socket 110 and the plug 130 changes.

[0045] For example, Figures 2A to 2C Shows an example of power, current, and voltage measured over time at the contact portion between the power socket and the plug in the case where oxides are generated due to aging of the blade holder of the power socket 110.

[0046] Figure 2A Shows an example of power value, current value, and voltage value measured at the contact portion at the start of oxide generation.Figure 2B An example of power value, current value, and voltage value measured at the contact portion at the time point of 60 minutes after the start of oxide generation is shown. In addition, Figure 2C An example of power value, current value, and voltage value measured at the contact portion at the time point of 120 minutes after the start of oxide generation is shown.

[0047] Referring to Figures 2A to 2C , it can be seen that in the case where the contact resistance changes as oxide is generated at the contact portion, since the load current is in a constant state, the voltage value of the contact portion changes based on V = IR. The same effect is caused by the change in the input voltage value input to the charging device 150.

[0048] Figure 3 An example of an isolation IC that can be used in Figure 1 the charging device to prevent fire is shown. The isolation IC detects the resistance of the terminal by converting the change amount of the alternating current (AC) voltage into a direct current (DC) voltage.

[0049] The charging device including the isolation IC detects overheating by using the method according to Figure 4 the following embodiments in

[0050] Figure 4 An example of a method for preventing overheating according to an embodiment of the present disclosure is shown.

[0051] The method for preventing overheating according to the present embodiment can be executed by Figure 1 the charging device 150 in

[0052] Referring to Figure 4 , the charging device 150 determines whether the plug 130 is connected to the power socket 110 (S410), and in the case where the plug 130 is connected to the power socket 110, the charging device 150 sets the voltage applied to the isolation IC to the reference voltage (S430).

[0053] The standard voltage supplied by a power distribution company such as the Korea Electric Power Corporation (KEPCO) to each household is 220V (AC), the reference allowable error is ±13V (voltage range is 207 to 233V), and the voltage environment varies from household to household. Therefore, the voltage initially applied to the isolation IC can be set as the reference voltage, and the terminal resistance and overheating can be determined by detecting subsequent voltage changes.

[0054] For example, when the voltage initially applied to the isolation IC is 210V, 210V can be set as the reference voltage.

[0055] In addition, the charging device 150 may determine whether a voltage drop or a peak value equal to or greater than a reference voltage is generated (S450).

[0056] In this case, when there is a poor contact between the power outlet 110 and the plug 130, resulting in an increase in contact resistance, a voltage drop equal to or greater than the reference voltage may occur, or a voltage peak with a threshold size or higher may occur.

[0057] When the determination result in step S450 indicates that the threshold size of the voltage drop is equal to or greater than the reference voltage or a voltage peak with a threshold size or higher appears, it is determined that overheating has occurred and an alert is sent to the user (S470).

[0058] On the other hand, in the present embodiment, since the charging device 150 needs to detect the change in the alternating current (AC) voltage as direct current (DC) and identify the direct current (DC) through the microcontroller unit (MCU), the charging device 150 may employ an isolated optocoupler IC.

[0059] Figure 5 A method for detecting overheating according to another embodiment of the present disclosure is shown.

[0060] The method for detecting overheating according to the present embodiment may be executed by Figure 1 the charging device 150 in

[0061] In addition, according to the present embodiment, overheating may be detected based on the sensing information of the temperature sensor. The microcontroller unit (MCU) in the charging device 150 may determine overheating by performing analog-to-digital conversion (ADC) on the resistance value of the negative temperature coefficient (NTC) temperature sensor in the plug 130. Since there is a current flow of 10 A or more during the charging process in the normal state, only low-temperature heat of 60 °C or lower is generated. However, in the case of a power outlet failure or the introduction of foreign objects, strong heat is generated quickly. When the temperature measured by the temperature sensor changes rapidly, software logic may be designed to cut off the charging and prevent overheating. For example, when the predetermined charging cut-off value according to the temperature is 100 °C, when the temperature value detected by the temperature sensor changes rapidly before the temperature reaches the preset cut-off temperature, information may be transmitted to the user in advance to prevent the charging device 150 from overheating. By using the above configuration, not only the target temperature can be detected, but also the temperature change amount can be detected, thereby preventing fires.

[0062] Referring to Figure 5 , the charging device 150 monitors the temperature of the plug 130 (S510).

[0063] In this case, the temperature monitoring of the plug 130 can be performed in each analog-to-digital conversion (ADC) cycle that converts the measured analog data temperature into digital data.

[0064] For example, when the ADC cycle is 1 ms, the charging device 150 can monitor the temperature of the plug 130 in each cycle of 1 ms.

[0065] In addition, the temperature of the plug 130 measured by the temperature sensor can be analog data, and the charging device 150 can convert the temperature measured as analog data into digital data in the ADC cycle and store the digital data.

[0066] In this case, the charging device 150 can initialize the value of the time counter to 0 at the time point when starting to monitor the plug temperature, and can count the elapsed time by increasing the time counter value over time starting from the time point when the counter value is initialized.

[0067] In addition, the charging device 150 stores the temperature of the plug 130 in the internal memory (S520).

[0068] In this case, the temperature of the plug 130 can be stored at a predetermined time interval and stored in each monitoring cycle.

[0069] For example, when the temperature monitoring cycle for the plug 130 is 1 ms, the temperature of the plug 130 can be stored in each monitoring cycle of 1 ms.

[0070] In this case, the temperature of the plug 130 can be sequentially stored in an array (A n )

[0071] In addition, the charging device 150 can perform compound superposition on all calculated temperature change amounts of the plug 130 and cumulatively store the sum of the temperature change amounts in the array.

[0072] In this case, the temperature change amount can be determined based on Equation 1 below.

[0073] Equation 1:

[0074] T n = A (n+1) - A n

[0075] In Equation 1, T n represents the temperature change amount of the plug 130 between the time point when any ADC is executed and the next time point, A (n+1) represents the temperature of the plug 130 at the (n + 1)th time point, and A nIndicates the temperature of the plug 130 at the nth time point.

[0076] For example, the ADC can execute 1000 times in 1 second, and n can be 1000.

[0077] In addition, the total sum of the temperature change amounts can be determined based on Equation 2 below.

[0078] Equation 2:

[0079] T sum = T1 + T2 + …… + T n

[0080] In Equation 2, T sum represents the total sum of the temperature change amounts up to the time point when the temperature monitoring of the plug is completed.

[0081] In addition, the charging device 150 determines whether the value of the time counter exceeds a preset threshold time (S530).

[0082] In this case, the preset threshold time can be set to any value, such as 1 second.

[0083] In this case, the time counter as a timer is used to count the elapsed time. For example, the time counter can be a timer configured to increment by a value every 1 ms. For example, when the value of the time counter exceeds 1000 and is 1001, it can be determined that the condition of step S530 is satisfied.

[0084] In the case where the determination result in step S530 indicates that the value of the time counter exceeds the preset threshold time, the charging device 150 determines the average increase value of the plug temperature per unit time based on the array of the temperature values of the plug 130 stored in the memory (S540).

[0085] For example, when the value of the time counter exceeds 1 second, the charging device 150 calculates the average increase value of the temperature per unit time based on the array of the temperature values of the plug 130 stored in the memory.

[0086] In this case, the charging device 150 obtains the average value of the temperature change amount (T avg ) by dividing the total sum of the temperature change amounts compounded and superimposed based on Equation 2 by the number of times the ADC has been performed on the temperature of the plug 130 within the threshold time.

[0087] For example, when the threshold time is 1 second, the average value of the temperature change amount can be determined based on Equation 3 below.

[0088] Equation 3:

[0089] Tavg = T sum / n

[0090] In Equation 3, T avg represents the average value of the temperature change amount up to the threshold time point, T sum represents the sum of the temperature change amounts up to the threshold time point, and n represents the number of times the ADC has been executed up to the threshold time. For example, the threshold time may be 1 second.

[0091] In addition, the charging device 150 determines whether the average increase in temperature per unit time exceeds a preset threshold range (S550). In the case where the average increase in temperature per unit time exceeds the preset threshold range, the charging device 150 cuts off the charging and sends an alert to the user (S560).

[0092] In this case, the charging device 150 can cut off the charging by outputting a 100% control pilot (CP) duty cycle.

[0093] On the other hand, in the case where the determination result in step S530 indicates that the value of the time counter does not exceed the preset threshold time, or in the case where the determination result in step S550 indicates that the average increase in temperature per unit time does not exceed the preset threshold range, the temperature of the plug 130 is continuously monitored (S510).

[0094] Figure 6 Shows an example in which the temperature of the plug rapidly increases due to a fastening defect of the power outlet according to an embodiment of the present disclosure.

[0095] Referring to Figure 6 , when the power outlet is poorly fastened and the temperature of the plug rapidly increases to 241 °C in a short time, the temperature sensor may not immediately detect the rapid increase in temperature and may sense the temperature as 93 °C. In addition, the ICCB in the prior art may not be able to detect the rapid increase in temperature at all.

[0096] However, the method for detecting overheating according to the embodiment of the present disclosure can detect overheating based on the amount of temperature change that rapidly increases in a short time by the temperature sensor, so that overheating of the contact terminal can be detected even before the sensed temperature reaches the threshold range.

[0097] Figure 7 Is a block diagram showing a computer system according to an embodiment of the present disclosure.

[0098] Referring to Figure 7 , the embodiment of the present disclosure can be implemented by a computer system such as a computer-readable recording medium. As Figure 7 shown, the computer system 700 includes a processor 710, a sensor unit 730, and a memory 750.

[0099] The processor 710 implements the method for diagnosing voltage anomalies in the battery unit of an environmentally friendly vehicle proposed in this specification. Specifically, the processor 710 implements all operations of the charging device 150 in the charging system 100 of the environmentally friendly vehicle described in the embodiments disclosed in this specification, and executes Figure 5 all operations of the method for detecting overheating in

[0100] For example, the processor 710 monitors the temperature of the plug 130.

[0101] In this case, the temperature of the plug 130 can be measured in each analog-to-digital conversion (ADC) cycle that converts the measured analog data temperature into digital data.

[0102] For example, when the ADC cycle is 1 ms, the charging device 150 can measure the temperature of the plug 130 at a cycle of 1 ms.

[0103] In addition, the processor 710 stores the temperature of the plug 130 in the memory 750.

[0104] In this case, the temperature of the plug 130 can be stored at a predetermined time interval and stored in each monitoring cycle.

[0105] For example, when the temperature monitoring cycle for the plug 130 is 1 ms, the temperature of the plug 130 can be stored in each 1-ms monitoring cycle.

[0106] In this case, the temperature of the plug 130 can be sequentially stored in an array (A n ).

[0107] In addition, the processor 710 can perform composite superposition on all calculated temperature change amounts of the plug 130, and cumulatively store the sum of the temperature change amounts in the array.

[0108] In addition, the processor 710 determines whether the value of the time counter exceeds a preset threshold time.

[0109] In this case, the preset threshold time can be set to any value, such as 1 second.

[0110] When the value of the time counter exceeds the preset threshold time, the processor 710 determines the average increase in temperature per unit time based on the array of temperature values of the plug 130 stored in the memory 750, that is, the average value of the temperature change amount per unit time.

[0111] For example, when the value of the time counter exceeds 1 second, the processor 710 determines the average value of the temperature change amount per unit time based on the array of temperature values of the plug 130 stored in the memory 750.

[0112] In addition, the processor 710 determines whether the average increase in temperature per unit time exceeds a preset threshold range. In the case where the average increase in temperature per unit time exceeds the preset threshold range, the processor 710 cuts off the charging and sends an alert to the user.

[0113] In this case, the charging device 150 can cut off the charging by outputting a 100% control pilot (CP) duty cycle.

[0114] The sensor unit 730 monitors the temperature of the plug.

[0115] In this case, the sensor unit 730 may include a temperature sensor.

[0116] The memory 750 may be various types of volatile or non-volatile storage media. In this case, the memory 750 stores at least one of the temperature of the plug, a time counter, the average increase in temperature, a threshold range, a threshold time, and combinations thereof.

[0117] The above embodiments of the present disclosure provide an improved ICCB structure and overheat detection logic that can prevent fires caused by overheating.

[0118] In addition, a power outlet that may catch fire can be detected in advance.

[0119] On the other hand, the above embodiments of the present disclosure can be implemented as computer-readable code on a medium recording a program. Computer-readable media include all types of storage devices for storing data readable by a computer system. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, and optical data storage devices. Therefore, it should be understood that the specific embodiments are illustrative in all respects and not restrictive. The scope of the present disclosure should be determined based on a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present disclosure belong to the scope of the present disclosure.

Claims

1. A method for detecting overheating during vehicle charging, the method comprising: monitoring a temperature of a plug connected to an electrical outlet supplying a charging voltage for charging a battery of the vehicle; Based on the temperature of the plug, determining an average value of the temperature change of the plug within a unit time; and In response to an average value of the temperature variation of the plug within a unit time exceeding a preset threshold range, charging is cut off.

2. The method according to claim 1, further comprising: Initializing a time counter at a time point when monitoring of the temperature of the plug begins; and The time counter is counted.

3. The method according to claim 2, wherein: Determining the average value of the temperature variation of the plug per unit time includes: Determine whether the value of the time counter exceeds a preset threshold time; and In response to the value of the time counter exceeding the preset threshold time, an average value of the temperature change of the plug within a unit time is determined based on the temperature of the plug.

4. The method according to claim 3, wherein: The monitoring plug temperature comprises: performing analog-to-digital conversion on the temperature of the plug at a preset predetermined period; storing the temperature of the plug each time the analog-to-digital conversion is performed; and The number of times the analog-to-digital conversion has been performed is stored.

5. The method according to claim 4, wherein: Determining the average value of the temperature variation of the plug per unit time includes: In the preset predetermined period, the change amount of the temperature of the plug is accumulated until the preset threshold time; and By dividing the accumulated amount of change in the temperature of the plug by the number of times the analog-to-digital conversion has been performed, an average value of the amount of change in the temperature of the plug within a unit time is determined.

6. A device for detecting overheating of a vehicle during charging, the device comprising: one or more processors; A non-transitory storage device storing a program executed by the one or more processors, the program including instructions for: monitoring a temperature of a plug connected to an electrical outlet supplying a charging voltage for charging a battery of the vehicle; Based on the temperature of the plug, determining an average value of the temperature change of the plug within a unit time; and In response to an average value of the temperature change within a unit time exceeding a preset threshold range, cutting off charging; as well as A memory stores the temperature of the plug.

7. The device according to claim 6, wherein: The program further includes instructions for: Initializing a time counter at a point in time when monitoring of the temperature of the plug begins; and The time counter is counted.

8. The device according to claim 7, wherein: The program further includes instructions for: Determine whether the value of the time counter exceeds a preset threshold time; and In response to determining that the value of the time counter exceeds the preset threshold time, an average value of the temperature change amount of the plug within a unit time is determined based on the temperature of the plug.

9. The device according to claim 8, wherein: The program further includes instructions for: performing analog-to-digital conversion on the temperature of the plug at a preset predetermined period; storing the temperature of the plug in the memory each time the analog-to-digital conversion is performed; and The number of times the analog-to-digital conversion has been performed is stored in the memory.

10. The device according to claim 9, wherein: The program further includes instructions for: In the preset predetermined period, the change amount of the temperature of the plug is accumulated until the preset threshold time; and By dividing the accumulated amount of change in the temperature of the plug by the number of times the analog-to-digital conversion has been performed, an average value of the amount of change in the temperature of the plug within a unit time is determined.

11. The device according to claim 6, wherein: The one or more processors are disposed in a charging device coupled between the plug and a battery disposed in the vehicle.

12. A vehicle comprising: Battery; Power socket; Charging device; as well as a plug to connect the power socket to the charging device; Wherein, the charging device: monitoring a temperature of the plug while the plug is connected to the electrical outlet; Based on the temperature of the plug, determining an average value of the temperature change of the plug within a unit time; and In response to an average value of the temperature variation of the plug within a unit time exceeding a preset threshold range, charging is cut off.

13. The vehicle according to claim 12, wherein the charging device further: Initializing a time counter at a point in time when monitoring of the temperature of the plug begins; and The time counter is counted.

14. The vehicle according to claim 13, wherein: In order to determine the average value of the temperature variation of the plug per unit time, the charging device: Determining whether the value of the time counter exceeds a preset threshold time; and In response to determining that the value of the time counter exceeds the preset threshold time, an average value of the temperature change amount of the plug within a unit time is determined based on the temperature of the plug.

15. The vehicle of claim 14, wherein: In order to monitor the temperature of the plug, the charging device: performing analog-to-digital conversion on the temperature of the plug at a preset predetermined period; storing the temperature of the plug each time the analog-to-digital conversion is performed; and The number of times the analog-to-digital conversion has been performed is stored.

16. The vehicle of claim 15, wherein: In order to determine the average value of the temperature variation of the plug per unit time, the charging device: Accumulating the temperature change of the plug at the preset predetermined period until the preset threshold time; and By dividing the accumulated temperature variation of the plug by the number of times the analog-to-digital conversion has been performed, an average value of the temperature variation of the plug within a unit time is determined.

17. The vehicle of claim 12, wherein: The plug further includes a temperature sensor, and in order to monitor the temperature of the plug, the charging device receives the temperature of the plug measured by the temperature sensor.

18. The vehicle of claim 12, wherein: The charging device includes an in-cable control box.

19. The vehicle of claim 12, wherein: The vehicle is an environmentally friendly vehicle.

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