Charging pile temperature control system based on the Internet of Things

Abstract

The present invention discloses a charging pile temperature control system based on the Internet of Things. The present invention relates to the field of temperature control technology and solves the problem that the influence of the external environment temperature is not fully considered, resulting in inaccurate temperature control, and after the adjustment is completed, the charging power is not changed, which will cause the charging rate of the charging pile to be slow. The present invention determines the specific value of the current by monitoring the temperature, and then determines whether the temperature of the charging pile is affected by the external environment temperature based on the standard current range confirmed in the test process, and determines the adjustment current and adjusts the charging pile based on specific numerical analysis; after the current of the charging pile is adjusted, in order to ensure the charging power of the charging pile, the temperature change trend of the charging pile is confirmed in the subsequent current increase process, and then the temperature control is performed to ensure the charging power of the charging pile.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control, and in particular to a charging pile temperature control system based on the Internet of Things. Background Art

[0002] Charging piles refer to charging devices that provide energy for electric vehicles. Their functions are similar to those of gas pumps in gas stations. They can be fixed on the ground or on the wall and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and parking lots or charging stations in residential areas. They can charge electric vehicles of various models according to different voltage levels.

[0003] The application with publication number CN110588400B discloses a temperature control system for a charging pile based on the Internet of Things, including a charging pile body, the charging pile body including a base, a support plate and a charging pile shell, a battery pack module is arranged on the support plate, a temperature sensor, a controller, a servo motor, a motor driver, a solenoid valve switch, a semiconductor refrigeration sheet and a wireless transmission module are arranged inside the charging pile shell, a remote control terminal is remotely connected to the wireless transmission module, the wireless transmission module is electrically connected to the controller, the solenoid valve switch is electrically connected to the semiconductor refrigeration sheet, the servo motor is electrically connected to the controller, heat dissipation holes are opened on both sides of the charging pile shell, and protective shells are arranged on both sides of the charging pile shell. The present invention is a temperature control system for a charging pile based on the Internet of Things, which can intelligently monitor the inside of the charging pile body, and can effectively cool the inside of the charging pile body to avoid damage to the inside of the charging pile body caused by excessive temperature.

[0004] During the temperature control process of the charging pile, the charging power of the charging pile is generally adjusted according to the actual temperature monitored by its sensor, so as to reduce the actual temperature of the charging pile. However, in the actual control process, due to insufficient consideration of the influence of the external ambient temperature, the temperature control is not accurate, and after the adjustment is completed, the charging power is not changed, which will cause the charging rate of the charging pile to be slow and the use effect is poor. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a charging pile temperature control system based on the Internet of Things, which solves the problem that the influence of the external ambient temperature is not fully considered, resulting in inaccurate temperature control, and the charging power is not changed after the adjustment is completed, which will cause the charging rate of the charging pile to be slow.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a charging pile temperature control system based on the Internet of Things, comprising:

[0007] The temperature monitoring end monitors the working temperature of the charging pile in real time and transmits the real-time monitored working temperature to the temperature control center;

[0008] A temperature control center performs temperature control when the operating temperature reaches the warning temperature, and the temperature control center includes a current confirmation unit, a preliminary determination unit, and a current regulation unit;

[0009] The current confirmation unit, based on the real-time monitored working temperature, preferentially determines whether the temperature triggers the warning signal, determines the warning current corresponding to the working temperature, and transmits the determined warning current to the preliminary determination unit;

[0010] The preliminary determination unit compares the warning current with the standard current working range based on the determined warning current, identifies whether the abnormal temperature of the charging pile is affected by the external ambient temperature, and determines the subsequent adjustment current based on the specific identification result, and transmits it to the current adjustment unit;

[0011] The current regulating unit regulates the current of the charging pile based on the determined regulating current, performs periodic monitoring to keep the charging pile in a normal working state, and then regulates the output current, and determines the regulation mode of the output current based on the temperature change trend during the regulation process;

[0012] It also includes: a test end, which performs pre-test processing on the charging pile. The specific test process is performed by an operator, who inputs a specified test current into the charging pile and records the maximum temperature that can be generated by the charging pile during the charging process with the test current.

[0013] Preferably, the temperature control center further includes a marked area confirmation unit, a change curve analysis unit and a database;

[0014] The standard area confirmation unit compares the maximum temperature with the preset value based on the maximum temperature corresponding to different test currents to determine the standard current working range of the charging pile; the specific method is:

[0015] The maximum temperature corresponding to different test currents is calibrated as WD i , where i represents different test currents;

[0016] Will meet WD i Several groups of test currents ≤Y1 are calibrated as standard currents, where Y1 is a preset value. The minimum and maximum values ​​are selected from the determined groups of standard currents to generate their standard current working ranges and transmit them to the preliminary determination unit. i No calibration is performed for groups of test currents ≤Y1.

[0017] Preferably, the specific sub-steps of the current confirmation unit determining whether its operating temperature triggers a warning signal include:

[0018] The real-time monitored working temperature is compared with the preset value Y1, where Y1 is the preset value. When the working temperature is greater than Y1, a warning signal is directly triggered and directly displayed on the external display terminal;

[0019] Based on the triggered warning signal, the warning current corresponding to the current moment is determined, and the warning current is transmitted to the preliminary determination unit.

[0020] Preferably, the database internally stores standard preset currents corresponding to different ambient temperatures, and at different ambient temperatures, the standard preset current is the maximum current value that the charging pile can reach.

[0021] Preferably, the preliminary determination unit determines the specific manner of adjusting the current as follows:

[0022] Determine whether the warning current belongs to the standard current working range. If the warning current∈standard current working range, it means that the charging pile is affected by the external environment temperature, and directly obtain the temperature of the external environment of the charging pile and calibrate it as DD:

[0023] Based on the determined ambient temperature DD, confirming a preset current corresponding to the ambient temperature DD from a database, and using the preset current as the adjustment current;

[0024] If the warning current does not belong to the standard current working range, it means that the working current of this charging pile is not within the standard current range, and the maximum current of this standard current working range is directly extracted as the adjustment current;

[0025] The confirmed regulation current is transmitted to the current regulation unit.

[0026] Preferably, it also includes:

[0027] The current monitoring end transmits the real-time monitored current value and temperature value to the change curve analysis unit, where the monitoring object is the charging pile.

[0028] Preferably, the change curve analysis unit generates a temperature value change curve based on the temperature values ​​corresponding to different current values, wherein the horizontal coordinate of the curve is the current value and the vertical coordinate of the curve is the temperature value, and divides the temperature value change curve into three groups of line segments, records the temperature change trends of the corresponding line segments, and generates trend intervals, wherein the specific method of generating the trend data packet includes:

[0029] Divide the generated value change curve into three groups of change line segments;

[0030] And confirm the several groups of temperature change trend values ​​generated in each group of change line segments, calibrate the coordinate parameters of adjacent points in the corresponding change line segments as A (X1, Y1) and B (X2, Y2), use Q = (Y2-Y1) ÷ (X2-X1) to confirm the trend value between the two points A and B, and then confirm the several groups of trend values ​​generated in this change line segment one by one, and then calibrate them as the temperature trend interval of this change line segment based on the maximum and minimum values ​​of several groups of trend values;

[0031] According to the numerical values ​​of different temperature trend intervals, the temperature trend interval with the smallest overall value is calibrated as a low trend interval, the temperature trend interval with the largest overall value is calibrated as a high trend interval, and the temperature trend interval with the middle overall value is calibrated as a medium trend interval.

[0032] Preferably, the current regulating unit performs the regulating process in the following specific manner:

[0033] Determine the monitoring period T, where T is a preset value. At the end of this monitoring period T, confirm whether the operating temperature of the charging pile is less than Y1. If so, perform subsequent processing. If not, continue to reduce the output current until the operating temperature is less than Y1.

[0034] Continue to increase the output current and determine the temperature change trend during the increase process. The change trend = temperature difference ÷ current difference. Determine the trend interval to which the change trend belongs:

[0035] If the change trend∈low trend interval, the output current increase rate can be increased;

[0036] If the change trend ∈ the middle trend interval, it is inconvenient to maintain the output current increase rate;

[0037] If the change trend∈high trend interval, the output current increase rate is reduced, wherein both the increase and the decrease are set with preset standards;

[0038] During the process of increasing the output current, the temperature of the charging pile is kept lower than Y1. If the temperature of the charging pile reaches (Y1-Ys), the output current is kept unchanged, where Ys is a preset value.

[0039] The present invention provides a charging pile temperature control system based on the Internet of Things. Compared with the prior art, it has the following beneficial effects:

[0040] The present invention determines the specific value of the current by monitoring the temperature, and then determines whether the temperature of the charging pile is affected by the external ambient temperature based on the standard current range confirmed during the test process. Based on the specific numerical analysis, the current is adjusted and the charging pile is adjusted to ensure that the temperature of the charging pile meets the standard and complete the temperature control process.

[0041] After the current of the charging pile is adjusted, in order to ensure the charging power of the charging pile, the temperature change trend of the charging pile is confirmed during the subsequent current increase process, and then temperature control is performed to ensure the charging power of the charging pile. At the same time, it is ensured that the temperature of the charging pile will not exceed the standard, thereby achieving a better temperature control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the principle framework of the present invention;

[0043] Figure 2 This is a schematic diagram of the temperature change of the charging pile of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Embodiment 1

[0046] See also Figure 1 , the present application provides a charging pile temperature control system based on the Internet of Things, including a temperature monitoring terminal, a current monitoring terminal, a test terminal and a temperature control center;

[0047] The temperature control center includes a marked area confirmation unit, a current confirmation unit, a preliminary determination unit, a current regulation unit, a change curve analysis unit and a database, wherein the marked area confirmation unit, the current confirmation unit and the database are all electrically connected to the input node of the preliminary determination unit, wherein the preliminary determination unit and the change curve analysis unit are all electrically connected to the input node of the current regulation unit;

[0048] Among them, the test end performs a pre-test process on the charging pile. The specific test process is performed by the operator, inputting a specified test current into the charging pile, and recording the maximum temperature that can be generated by the charging pile during the charging process of the test current, and transmitting the test data to the mark area confirmation unit, wherein the test data includes the test current and the corresponding maximum temperature;

[0049] The standard area confirmation unit compares the maximum temperature with the preset value based on the maximum temperature corresponding to different test currents to determine the standard current working range of the charging pile, wherein the comparison method is:

[0050] The maximum temperature corresponding to different test currents is calibrated as WD i , where i represents different test currents;

[0051] Will meet WD i Several groups of test currents ≤Y1 are calibrated as standard currents, where Y1 is a preset value. Its specific value is determined by the operator based on experience. The minimum and maximum values ​​are selected from the determined groups of standard currents to generate the standard current working range and transmit it to the preliminary judgment unit. i No calibration is performed for the test currents of several groups ≤Y1;

[0052] Specifically, the reason for determining the standard current operating range here is to confirm whether the corresponding current belongs to the standard current operating range when the temperature of the charging pile is abnormal. Based on the specific identification results, it is determined whether the abnormal temperature of the charging pile is affected by the external ambient temperature, and based on this range, the specific current that needs to be adjusted for the charging pile is determined.

[0053] The temperature monitoring terminal monitors the working temperature of the charging pile in real time and transmits the real-time monitored working temperature to the temperature control center;

[0054] Among them, the current confirmation unit inside the temperature control center, based on the real-time monitored working temperature, first determines whether its temperature triggers the warning signal, and determines the warning current corresponding to the working temperature, and transmits the determined warning current to the preliminary determination unit, wherein the specific sub-steps of making the determination include:

[0055] The real-time monitored working temperature is compared with the preset value Y1, where Y1 is a preset value, and its specific value is determined by the operator based on experience. When the working temperature is greater than Y1, the warning signal is directly triggered and directly displayed on the external display terminal;

[0056] Based on the triggered warning signal, determine the warning current corresponding to the current moment, and transmit the warning current to the preliminary determination unit;

[0057] Specifically, when its working temperature reaches the specified value, it will trigger a warning signal, indicating that the working temperature of this charging pile is high. Based on the determined warning signal, the real-time charging current of the charging pile can be determined, which is the corresponding warning current. This warning current is the corresponding parameter for generating the corresponding warning temperature.

[0058] The database stores standard preset currents corresponding to different ambient temperatures. The preset currents are all prepared by operators in advance based on experience. At different ambient temperatures, the standard preset current is the maximum current value that the charging pile can reach. If this current value is exceeded, the working temperature of the charging pile will be abnormal. Therefore, the standard preset current is determined to limit the working current of the charging pile.

[0059] The preliminary determination unit identifies whether the abnormal temperature of the charging pile is affected by the external ambient temperature based on the determined warning current and standard current working range, and determines the subsequent adjustment current based on the specific identification result, and transmits it to the current adjustment unit. The specific method of determining the adjustment current is:

[0060] Determine whether the warning current belongs to the standard current working range. If the warning current∈standard current working range, it means that the charging pile is affected by the external environment temperature, and directly obtain the temperature of the external environment of the charging pile and calibrate it as DD:

[0061] Based on the determined ambient temperature DD, confirming a preset current corresponding to the ambient temperature DD from a database, and using the preset current as the adjustment current;

[0062] If the warning current does not belong to the standard current working range, it means that the working current of this charging pile is not within the standard current range, and the maximum current of this standard current working range is directly extracted as the adjustment current;

[0063] transmitting the confirmed regulated current to the current regulating unit;

[0064] Specifically, with respect to the abnormal temperature generated, it is necessary to consider whether the temperature of the charging pile is affected by the external ambient temperature. If it is not affected by the external environment, the adjustment current can be directly determined by the determined standard current working range. If it is affected by the external ambient temperature, the corresponding working current of the charging pile can be directly confirmed from the database through the numerical value of the corresponding ambient temperature, and adjusted accordingly.

[0065] Embodiment 2

[0066] In the specific implementation process of this embodiment, the charging data before the charging pile generates the warning signal is mainly used to determine the temperature change trend based on the charging data;

[0067] Among them, the current monitoring end and the temperature monitoring end transmit the real-time monitored current value and temperature value to the change curve analysis unit, wherein the monitoring object is the charging pile;

[0068] The change curve analysis unit generates a temperature value change curve based on the temperature values ​​corresponding to different current values, wherein the horizontal coordinate of the curve is the current value and the vertical coordinate of the curve is the temperature value, and divides the temperature value change curve into three groups of line segments, records the temperature change trend of the corresponding line segments, and generates a trend interval, wherein the specific method of generating the trend data packet includes:

[0069] Divide the generated value change curve into three groups of change line segments;

[0070] And confirm the several groups of temperature change trend values ​​generated in each group of change line segments, calibrate the coordinate parameters of adjacent points in the corresponding change line segments as A (X1, Y1) and B (X2, Y2), use Q = (Y2-Y1) ÷ (X2-X1) to confirm the trend value between the two points A and B, and then confirm the several groups of trend values ​​generated in this change line segment one by one, and then calibrate them as the temperature trend interval of this change line segment based on the maximum and minimum values ​​of several groups of trend values;

[0071] According to the numerical values ​​of different temperature trend intervals, the temperature trend interval with the smallest overall value is calibrated as the low trend interval, the temperature trend interval with the largest overall value is calibrated as the high trend interval, and the temperature trend interval with the middle overall value is calibrated as the medium trend interval. Specifically, as the current changes, the temperature changes gradually, and the temperature change is nonlinear. The temperature change is as follows: Figure 2 As shown, there is no decline, so the generated trend intervals are different. Assuming there are three groups of trend intervals [1, 3], (3, 5] and (5, 7], among which [1, 3] is the group of temperature trend intervals with the smallest overall value, that is, the low trend interval, then the medium trend interval (3, 5] and the high trend interval (5, 7] can be determined;

[0072] Determining different trend intervals here is to facilitate subsequent current regulation to determine its adjustment method and avoid affecting the normal operation of the charging pile.

[0073] Embodiment 3

[0074] In the specific implementation process of this embodiment, the current regulation process of the entire charging pile is to ensure that the temperature of the charging pile can be reduced;

[0075] The current regulating unit regulates the current of the charging pile based on the determined regulating current, adjusts the output current to the regulating current, performs periodic monitoring to keep the charging pile in a normal working state, and then regulates the output current, and determines the regulation mode of the output current based on the temperature change trend during the regulation process. The specific mode of the regulation process is as follows:

[0076] Determine the monitoring period T, where T is a preset value. The specific value of the preset value is determined by the operator based on experience. At the end of this monitoring period T, confirm whether the operating temperature of the charging pile is less than Y1. If it is less than, perform subsequent processing. If it is not less than, continue to reduce the output current until the operating temperature is less than Y1;

[0077] Continue to increase the output current and determine the temperature change trend during the increase process. The change trend = temperature difference ÷ current difference. Determine the trend interval to which the change trend belongs:

[0078] If the change trend∈low trend interval, the output current increase rate can be increased;

[0079] If the change trend ∈ the middle trend interval, it is inconvenient to maintain the output current increase rate;

[0080] If the change trend∈high trend interval, the output current increase rate is reduced, wherein both increase and decrease are set with preset standards, which are prepared in advance by the operator based on experience;

[0081] When the output current is increasing, the temperature of the charging pile is kept lower than Y1. If the temperature of the charging pile reaches (Y1-Ys), the output current is kept unchanged, where Ys is a preset value, and its specific value is determined by the operator based on experience;

[0082] Specifically, after completing the temperature control here, the reason why the current needs to be increased is to ensure the charging power of the charging pile. After the temperature is controlled, the charging current may drop to a lower level. Therefore, in order to ensure its charging power, it is necessary to ensure its charging current, it is necessary to increase its charging current, ensure its charging power, and improve the overall temperature control effect of its charging pile.

[0083] Embodiment 4

[0084] The specific implementation process of this embodiment includes all the implementation processes of the above three groups of embodiments.

[0085] Some of the data in the above formulas are dimensionless and numerically calculated. Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0086] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. The charging pile temperature control system based on the Internet of Things is characterized by: include: The temperature monitoring end monitors the working temperature of the charging pile in real time and transmits the real-time monitored working temperature to the temperature control center; A temperature control center performs temperature control when the operating temperature reaches the warning temperature, and the temperature control center includes a current confirmation unit, a preliminary determination unit, and a current regulation unit; The current confirmation unit, based on the real-time monitored working temperature, preferentially determines whether the temperature triggers the warning signal, determines the warning current corresponding to the working temperature, and transmits the determined warning current to the preliminary determination unit; The temperature control center also includes a marked area confirmation unit, a change curve analysis unit and a database; The standard area confirmation unit compares the maximum temperature with the preset value based on the maximum temperature corresponding to different test currents to determine the standard current working range of the charging pile. The specific method is as follows: The maximum temperature corresponding to different test currents is calibrated as WD i , where i represents different test currents; Will meet WD i Several groups of test currents ≤Y1 are calibrated as standard currents, where Y1 is a preset value. The minimum and maximum values ​​are selected from the determined groups of standard currents to generate their standard current working ranges and transmit them to the preliminary determination unit. i No calibration is performed for the test currents of several groups ≤Y1; The specific sub-steps of the current confirmation unit determining whether its operating temperature triggers a warning signal include: The real-time monitored working temperature is compared with the preset value Y1, where Y1 is the preset value. When the working temperature is greater than Y1, a warning signal is directly triggered and directly displayed on the external display terminal; Based on the triggered warning signal, determine the warning current corresponding to the current moment, and transmit the warning current to the preliminary determination unit; The database internally stores standard preset currents corresponding to different ambient temperatures. At different ambient temperatures, the standard preset current is the maximum current value that the charging pile can reach; The preliminary determination unit compares the warning current with the standard current working range based on the determined warning current, identifies whether the abnormal temperature of the charging pile is affected by the external ambient temperature, and determines the subsequent adjustment current based on the specific identification result, and transmits it to the current adjustment unit; The preliminary determination unit determines the specific method of adjusting the current as follows: Determine whether the warning current belongs to the standard current working range. If the warning current∈standard current working range, it means that the charging pile is affected by the external environment temperature, and directly obtain the temperature of the external environment of the charging pile and calibrate it as DD: Based on the determined ambient temperature DD, confirming a preset current corresponding to the ambient temperature DD from a database, and using the preset current as the adjustment current; If the warning current does not belong to the standard current working range, it means that the working current of this charging pile is not within the standard current range, and the maximum current of this standard current working range is directly extracted as the adjustment current; transmitting the confirmed regulated current to the current regulating unit; The current regulating unit regulates the current of the charging pile based on the determined regulating current, and performs periodic monitoring to keep the charging pile in a normal working state, and then regulates the output current, and determines the regulation method of the output current based on the temperature change trend during the regulation process.

2. The charging pile temperature control system based on the Internet of Things according to claim 1 is characterized in that: Also includes: At the test end, the charging pile is pre-tested. The specific test process is performed by the operator, who inputs a specified test current into the charging pile and records the maximum temperature that can be generated by the charging pile during the charging process with this test current.

3. The charging pile temperature control system based on the Internet of Things according to claim 1 is characterized in that: Also includes: The current monitoring end transmits the real-time monitored current value and temperature value to the change curve analysis unit, where the monitoring object is the charging pile.

4. The charging pile temperature control system based on the Internet of Things according to claim 3 is characterized in that: The change curve analysis unit generates a temperature value change curve based on the temperature values ​​corresponding to different current values, wherein the horizontal coordinate of the curve is the current value and the vertical coordinate of the curve is the temperature value, and divides the temperature value change curve into three groups of line segments, records the temperature change trends of the corresponding line segments, and generates trend intervals, wherein the specific method of generating the trend data packet includes: Divide the generated value change curve into three groups of change line segments; And confirm the several groups of temperature change trend values ​​generated in each group of change line segments, calibrate the coordinate parameters of adjacent points in the corresponding change line segments as A (X1, Y1) and B (X2, Y2), use Q = (Y2-Y1) ÷ (X2-X1) to confirm the trend value between the two points A and B, and then confirm the several groups of trend values ​​generated in this change line segment one by one, and then calibrate them as the temperature trend interval of this change line segment based on the maximum and minimum values ​​of several groups of trend values; According to the numerical values ​​of different temperature trend intervals, the temperature trend interval with the smallest overall value is calibrated as a low trend interval, the temperature trend interval with the largest overall value is calibrated as a high trend interval, and the temperature trend interval with the middle overall value is calibrated as a medium trend interval.

5. The charging pile temperature control system based on the Internet of Things according to claim 4 is characterized in that: The current regulating unit performs the regulating process in the following specific manner: Determine the monitoring period T, where T is a preset value. At the end of this monitoring period T, confirm whether the operating temperature of the charging pile is less than Y1. If so, perform subsequent processing. If not, continue to reduce the output current until the operating temperature is less than Y1. Continue to increase the output current and determine the temperature change trend during the increase process. The change trend = temperature difference ÷ current difference. Determine the trend to which the change trend belongs. Range: If the change trend∈low trend interval, the output current increase rate can be increased; If the change trend ∈ the middle trend interval, it is inconvenient to maintain the output current increase rate; If the change trend∈high trend interval, the output current increase rate is reduced, wherein both the increase and the decrease are set with preset standards; During the process of increasing the output current, the temperature of the charging pile is kept lower than Y1. If the temperature of the charging pile reaches (Y1-Ys), the output current is kept unchanged, where Ys is a preset value.

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