Charging pile thermal runaway monitoring method and device, storage medium, and computer equipment

Abstract

The present application relates to the field of charging pile monitoring technology, and discloses a charging pile thermal runaway monitoring method and device, storage medium, and computer equipment. The charging pile thermal runaway monitoring method includes: obtaining the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within a preset metering period; based on a plurality of consecutive preset metering periods, determining the target monitoring period, and constructing the power conservation equation according to the total power supply, distributed power supply, and the loss of power during the charging station to the charging pile in each preset metering period within the target monitoring period; according to the power conservation equation within the target monitoring period, solving the loss of each charging pile in each preset metering period, and obtaining the comparison result of the AC / DC loss rate in the solved loss situation with the preset AC / DC loss rate threshold, and determining the thermal runaway monitoring result of the charging pile within the preset metering period. Monitoring whether the charging pile has the risk of thermal runaway by big data improves the safety of charging pile use.

Description

Technical Field

[0001] The present application relates to the technical field of charging pile monitoring, and in particular to a charging pile thermal runaway monitoring method and device, storage medium, and computer equipment. Background Art

[0002] With the vigorous development of the electric vehicle industry and the surge in the number of electric vehicles, the safety and reliability issues of charging infrastructure have gradually surfaced and become one of the key factors restricting the healthy development of the industry. Charging piles, as the core equipment for electric vehicle energy replenishment, are directly related to the safety of users' lives and property and the speed of popularization of electric vehicles. Especially during the charging process, due to the rapid changes in current and voltage and the problem of power conversion efficiency, charging piles are prone to thermal runaway, which will not only accelerate equipment aging, but may also cause serious consequences such as fire. Therefore, thermal runaway monitoring of charging piles has become a focus of common concern within and outside the industry.

[0003] Thermal runaway during charging is mainly due to the failure to effectively dissipate the heat generated by the internal components of the charging pile during high-load operation, which leads to a sharp rise in temperature, which may cause faults such as short circuits and insulation failures, and ultimately cause fires. This risk exists not only in large charging equipment at public charging stations, but also lurks in home charging environments, posing a potential threat to the daily charging behavior of electric vehicle users. Summary of the invention

[0004] In view of this, the present application provides a charging pile thermal runaway monitoring method and device, storage medium, and computer equipment, which obtain the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter measurement of the charging station, and the sub-power supply is obtained based on the sub-power meter measurement at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it; based on a plurality of consecutive preset metering periods, a target monitoring period is determined, and according to the total power supply, sub-power supply, and the power supplied by the charging station to the charging pile in each preset metering period within the target monitoring period, The power conservation equation is constructed based on the power loss during the power transmission process, where the loss includes the total power loss during the power transmission process from the charging station to the charging pile, the AC / DC loss rate during the process of the charging pile converting AC power into DC power, and the metering loss rate during the metering process of the sub-meter; according to the power conservation equation within the target monitoring period, the loss of each charging pile in each preset metering period is solved, and the AC / DC loss rate in the solved loss situation is obtained; based on the comparison result of the AC / DC loss rate with the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is determined. Monitoring whether the charging pile has the risk of thermal runaway through big data can improve the safety of the charging pile.

[0005] According to one aspect of the present application, a charging pile thermal runaway monitoring method is provided, and the charging pile thermal runaway monitoring method comprises:

[0006] Obtaining the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter of the charging station, and the sub-power supply is obtained based on the sub-power meter at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it;

[0007] Based on a plurality of consecutive preset metering periods, a target monitoring period is determined, and according to the total power supply, the distributed power supply and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, an energy conservation equation is constructed, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC and DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the process of metering by the distributed meter;

[0008] According to the power conservation equation of the target monitoring period, the total power supply and the distributed power supply are known quantities, and the loss situation is unknown quantity, the loss situation of each charging pile in each preset metering period is solved, and the AC and DC loss rates in the solved loss situation are obtained;

[0009] Based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is determined.

[0010] Optionally, the energy conservation equation is constructed according to the total power supply, the distributed power supply and the loss in the process of transmitting power from the charging station to the charging pile in each preset metering period within the target monitoring period, including:

[0011] According to the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the formula for constructing the power conservation equation during the target monitoring period, the power conservation equation for the target monitoring period is constructed, wherein the formula for constructing the power conservation equation is:

[0012] ,

[0013] To include The total power supply during the target monitoring period of the preset metering period, is the total number of charging piles, For the The measurement loss rate of the sub-meters of each charging pile, For the The first The power supply of each charging pile, For the The first The AC and DC loss rate of each charging pile, For the The total power consumption of the charging station during the preset metering period.

[0014] Optionally, the power conservation equation of the target monitoring period, taking the total power supply and the distributed power supply as known quantities and the loss situation as an unknown quantity, solving the loss situation of each charging pile in each preset metering period, includes:

[0015] According to the ridge regression algorithm, the total power supply and the distributed power supply are taken as known quantities, and the loss situation is taken as the unknown quantity, and the power conservation equation of the target monitoring period is fitted and solved to obtain the loss situation of each charging pile in each preset metering period.

[0016] Optionally, the determining the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and a preset AC / DC loss rate threshold includes:

[0017] When the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is no risk of thermal runaway;

[0018] When the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is a risk of thermal runaway.

[0019] Optionally, after determining the thermal runaway monitoring result of the charging pile within a preset metering period, the charging pile thermal runaway monitoring method further includes:

[0020] Based on the thermal runaway monitoring result and the preset metering period corresponding to the thermal runaway monitoring result, thermal runaway monitoring display information is generated, and the thermal runaway monitoring display information is displayed in real time on a preset display platform.

[0021] Optionally, after determining the thermal runaway monitoring result of the charging pile within a preset metering period, the charging pile thermal runaway monitoring method further includes:

[0022] When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, risk warning information is generated based on the location information of the charging pile with the risk of thermal runaway, and the risk warning information is sent to a preset receiving terminal.

[0023] Optionally, after determining the thermal runaway monitoring result of the charging pile within a preset metering period, the charging pile thermal runaway monitoring method further includes:

[0024] When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, the real-time temperature of the charging pile is obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, thermal runaway alarm information is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm information is sent to a preset receiving terminal.

[0025] According to another aspect of the present application, a charging pile thermal runaway monitoring device is provided, and the charging pile thermal runaway monitoring device comprises:

[0026] A metering power acquisition module is used to obtain the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter of the charging station, and the sub-power supply is obtained based on the sub-power meter at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it;

[0027] A balance equation construction module is used to determine a target monitoring period based on a plurality of consecutive preset metering periods, and to construct an energy conservation equation according to the total power supply, the distributed power supply, and the loss of the power delivered by the charging station to the charging pile in each preset metering period within the target monitoring period, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC / DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the metering process of the distributed meter;

[0028] An equation fitting and solving module is used to solve the loss situation of each charging pile in each preset metering period according to the power conservation equation of the target monitoring period, with the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantity, and obtain the AC and DC loss rates in the solved loss situation;

[0029] The thermal runaway monitoring module is used to determine the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold.

[0030] Optionally, the balance equation building module is further used to:

[0031] According to the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the formula for constructing the power conservation equation during the target monitoring period, the power conservation equation for the target monitoring period is constructed, wherein the formula for constructing the power conservation equation is:

[0032] ,

[0033] To include The total power supply during the target monitoring period of the preset metering period, is the total number of charging piles, For the The measurement loss rate of the sub-meters of each charging pile, For the The first The power supply of each charging pile, For the The first The AC and DC loss rate of each charging pile, For the The total power consumption of the charging station during the preset metering period.

[0034] Optionally, the equation fitting and solving module is further used for:

[0035] According to the ridge regression algorithm, the total power supply and the distributed power supply are taken as known quantities, and the loss situation is taken as the unknown quantity, and the power conservation equation of the target monitoring period is fitted and solved to obtain the loss situation of each charging pile in each preset metering period.

[0036] Optionally, the thermal runaway monitoring module is further used to:

[0037] When the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is no risk of thermal runaway;

[0038] When the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is a risk of thermal runaway.

[0039] Optionally, the charging pile thermal runaway monitoring device further includes a monitoring result display module, which is used to:

[0040] Based on the thermal runaway monitoring result and the preset metering period corresponding to the thermal runaway monitoring result, thermal runaway monitoring display information is generated, and the thermal runaway monitoring display information is displayed in real time on a preset display platform.

[0041] Optionally, the charging pile thermal runaway monitoring device further includes: a monitoring information sending module, which is used to:

[0042] When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, risk warning information is generated based on the location information of the charging pile with the risk of thermal runaway, and the risk warning information is sent to a preset receiving terminal.

[0043] Optionally, the monitoring information sending module is further used to:

[0044] When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, the real-time temperature of the charging pile is obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, thermal runaway alarm information is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm information is sent to a preset receiving terminal.

[0045] According to another aspect of the present application, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned charging pile thermal runaway monitoring method is implemented.

[0046] According to another aspect of the present application, a computer device is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor implements the above-mentioned charging pile thermal runaway monitoring method when executing the program.

[0047] By means of the above technical scheme, the present application provides a charging pile thermal runaway monitoring method and device, storage medium, and computer equipment, which obtain the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within the preset metering period, and the charging pile converts the AC power transmitted by the charging station into DC power for output; based on a plurality of consecutive preset metering periods, the target monitoring period is determined, and the power conservation equation is constructed according to the total power supply, distributed power supply, and the loss of power transmitted from the charging station to the charging pile in each preset metering period within the target monitoring period; according to the power conservation equation within the target monitoring period, the loss of each charging pile in each preset metering period is solved, and the AC and DC loss rate in the solved loss situation is obtained; based on the comparison result of the AC and DC loss rate with the preset AC and DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is determined. Monitoring whether the charging pile has the risk of thermal runaway through big data can improve the safety of the use of the charging pile.

[0048] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0050] Figure 1 A schematic diagram of a charging pile thermal runaway monitoring method provided in an embodiment of the present application is shown;

[0051] Figure 2A schematic diagram of a power transmission process between a charging station and a charging pile provided in an embodiment of the present application is shown;

[0052] Figure 3 A schematic diagram of a process of another charging pile thermal runaway monitoring method provided in an embodiment of the present application is shown;

[0053] Figure 4 A schematic diagram of a process flow of another charging pile thermal runaway monitoring method provided in an embodiment of the present application is shown;

[0054] Figure 5 A schematic diagram of the structure of a charging pile thermal runaway monitoring device provided in an embodiment of the present application is shown;

[0055] Figure 6 A schematic structural diagram of another charging pile thermal runaway monitoring device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0056] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0057] In this embodiment, a charging pile thermal runaway monitoring method is provided. Figure 1 As shown, the charging pile thermal runaway monitoring method includes:

[0058] Step 101, obtaining the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total meter measurement of the charging station, and the distributed power supply is obtained based on the distributed meter measurement at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it.

[0059] In the above embodiment of the present application, it can be applied to the real-time monitoring of each charging pile in any charging station. Specifically, the total power supply of the charging station and the power supply of each charging pile in the charging station are obtained within the preset metering period. The length of the preset metering period can be set to 15 minutes, so there are a total of 96 preset metering periods in a day. In particular, the charging station, for example Figure 2 As shown in the figure, the charging station transmits AC power to the charging pile, and the charging pile converts the AC power into DC power through the internal AC / DC conversion module, and then outputs it through the charging gun. Therefore, users can charge with DC power through the charging gun. The total power meter of the charging station is responsible for measuring the total power supply of the charging station, and the sub-meter at the output end of the charging pile is responsible for measuring the DC power output by the charging pile.

[0060] Step 102, based on a plurality of consecutive preset metering periods, a target monitoring period is determined, and an energy conservation equation is constructed according to the total power supply, the distributed power supply, and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC / DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the metering process of the distributed meter.

[0061] Next, based on multiple consecutive preset metering time periods, the target monitoring time period is determined. For example, taking the preset metering time period of 15 minutes as an example, the target monitoring time period is determined based on 96 consecutive 15-minute periods in a day. Since the charging station will generate transmission losses when transmitting electricity to each charging pile, according to the law of conservation of energy, the total power of the charging station is equal to the sum of the distributed power of the charging pile and the loss caused in the transmission process. Therefore, according to the total power supply, distributed power supply and the loss in the process of transmitting electricity from the charging station to the charging pile in each preset metering time period within the target monitoring period, the energy conservation equation can be constructed. In particular, in order to improve the accuracy of the unknown quantity solved after the equation is constructed, in the process of constructing the energy conservation equation, it is necessary to fully consider various loss conditions, that is, the loss conditions include the total power loss in the process of the charging station outputting electricity to the charging pile, the AC and DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the metering process of the distributed meter.

[0062] Step 103, according to the power conservation equation of the target monitoring period, with the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantity, solve the loss situation of each charging pile in each preset metering period, and obtain the AC and DC loss rates in the solved loss situation.

[0063] Next, according to the energy conservation equation constructed in the target monitoring period, the loss of each charging pile in each preset metering period is solved, and the AC and DC loss rates in the solved loss conditions are obtained. In particular, the energy conservation equation contains multiple preset metering periods, that is, each preset metering period constitutes a "power balance relationship". According to multiple power balance relationships, the solution of unknown quantities applicable to each "power balance relationship" can be fitted in the end. In the energy conservation equation, the unknown quantities include the total power loss of the charging station in each preset metering period, the AC and DC loss rate of each charging pile, and the metering loss rate of each sub-meter. After solving the AC and DC loss rate of each charging pile in each preset metering period, the AC and DC loss rate can be used to judge whether the charging pile has the risk of thermal runaway during use.

[0064] Step 104: Determine a thermal runaway monitoring result of the charging pile within a preset metering period based on a comparison result of the AC / DC loss rate and a preset AC / DC loss rate threshold.

[0065] Finally, based on the comparison between the AC and DC loss rates and the preset AC and DC loss rate thresholds, the thermal runaway monitoring results of the charging piles within the preset metering period are determined. To this end, through big data calculation, the status of the charging piles can be monitored in real time, so that when there is a risk of thermal runaway, abnormal charging piles can be handled immediately, thereby improving the safety of the charging piles during use and reducing the risk of personal injury to users.

[0066] By applying the technical solution of this embodiment, the total power supply of the charging station and the distributed power supply of each charging pile in the charging station are obtained within the preset metering period, and the charging pile converts the AC power transmitted by the charging station into DC power for output; based on a plurality of consecutive preset metering periods, the target monitoring period is determined, and the power conservation equation is constructed according to the total power supply, distributed power supply and the loss of power transmitted from the charging station to the charging pile in each preset metering period within the target monitoring period; according to the power conservation equation within the target monitoring period, the loss of each charging pile in each preset metering period is solved, and the AC and DC loss rate in the solved loss situation is obtained; based on the comparison result of the AC and DC loss rate with the preset AC and DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is determined. Monitoring whether the charging pile has the risk of thermal runaway through big data can improve the safety of the use of the charging pile.

[0067] Further, as a refinement and extension of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, another charging pile thermal runaway monitoring method is provided, such as Figure 3 As shown, the charging pile thermal runaway monitoring method includes:

[0068] Step 201, obtaining the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within a preset metering period, and determining a target monitoring period based on a plurality of consecutive preset metering periods, wherein the total power supply is obtained based on the total meter measurement of the charging station, and the distributed power supply is obtained based on the distributed meter measurement at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it.

[0069] In the above embodiment of the present application, the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within the preset metering period are first obtained, and the target monitoring period is determined based on multiple consecutive preset metering periods. For example, with each 15 minutes as a preset metering period, the power data of 96 consecutive preset metering periods in one day are obtained. The power data includes the total power supply of the charging station and the distributed power supply of each charging pile in the charging station. The total power supply is obtained based on the total meter measurement of the charging station, and the distributed power supply is obtained based on the distributed meter measurement at the output end of the charging pile, in preparation for subsequent thermal runaway monitoring of the charging pile.

[0070] Step 202, constructing the power conservation equation of the target monitoring period according to the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the power conservation equation construction formula within the target monitoring period, wherein the power conservation equation construction formula is:

[0071] ,

[0072] To include The total power supply during the target monitoring period of the preset metering period, is the total number of charging piles, For the The measurement loss rate of the sub-meters of each charging pile, For the The first The power supply of each charging pile, For the The first The AC and DC loss rate of each charging pile, For the The total power consumption of the charging station during the preset metering period.

[0073] Next, considering the various losses in the process of power transmission from the charging station to the charging pile and the law of conservation of electricity, that is, the total power supply measured by the total meter on the charging side should be equal to the divided power measured by each sub-meter and various losses. Specifically, the loss situation includes the total power loss in the process of power output from the charging station to the charging pile, the AC and DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the metering process of the sub-meter. The formula can be constructed according to the total power supply in each preset metering period within the target monitoring period, the total power loss of the charging station, the divided power supply of each charging pile, the AC and DC loss rate of each charging pile, the metering loss rate of each sub-meter and the energy conservation equation to construct the energy conservation equation. Among them, taking the various data of a single charging pile within a preset metering period as an example, the shared power supply of the charging pile is divided by the AC / DC loss rate. Since the shared power supply is measured by the sub-meter located at the output end of the charging pile, the shared power supply including "AC / DC loss" can be obtained through the ratio of the shared power supply measured on the DC side to the AC / DC loss rate, that is, the "shared power supply of the charging pile when AC / DC conversion is not performed". At this time, since the sub-meter will also generate losses during the metering process, the "shared power supply when AC / DC conversion is not performed" and the metering loss rate are used to calculate the "actual shared power supply" of the sub-meter. In addition, the AC power of the charging station will also generate losses during the transmission process to the charging pile, that is, the total loss power of the charging station. The power calculated by considering the losses of the three parts is equal to the total power supply.

[0074] Step 203, according to the ridge regression algorithm, with the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantities, the power conservation equation of the target monitoring period is fitted and solved to obtain the loss situation of each charging pile in each preset metering period, and the AC and DC loss rates in the solved loss situation are obtained.

[0075] Next, the ridge regression algorithm can be used to solve the unknown quantities in the energy conservation equation. The known quantities in the energy conservation equation are the total power supply and the distributed power supply. The remaining total power loss, AC / DC loss rate, and metering loss rate are all unknown quantities. In the solution process, the total power loss, AC / DC loss rate, and metering loss rate can be obtained at the same time. The thermal runaway risk of the charging pile can be judged based on the AC / DC loss rate in the solved loss situation. In particular, the least squares method can also be used to calculate each unknown quantity. The ridge regression algorithm can reduce the variance by reducing the deviation, can effectively prevent the overfitting phenomenon caused by the high degree of collinearity of the terminal branch data, and can improve the accuracy of the equation solution.

[0076] Step 204: When the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is that there is no risk of thermal runaway.

[0077] Step 205: When the calculated AC / DC loss rate is greater than a preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is that there is a risk of thermal runaway.

[0078] Step 206 , generating thermal runaway monitoring display information based on the thermal runaway monitoring result and the preset metering period corresponding to the thermal runaway monitoring result, and displaying the thermal runaway monitoring display information in real time on a preset display platform.

[0079] Next, when the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is that there is no risk of thermal runaway. The preset AC / DC loss rate threshold is, for example, 10%. When the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is that there is a risk of thermal runaway. At the same time, it is also possible to generate thermal runaway monitoring display information based on the thermal runaway monitoring results and the preset metering period corresponding to the thermal runaway monitoring results, and display the thermal runaway monitoring display information in real time on the preset display platform. To this end, by displaying the thermal runaway monitoring results of each preset metering period in real time, it is convenient for monitoring personnel to timely understand the operating status of the charging pile, so as to timely avoid the risk of thermal runaway according to the monitored status.

[0080] By applying the technical solution of this embodiment, the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within the preset metering period are obtained, and the target monitoring period is determined based on multiple consecutive preset metering periods. According to the target monitoring period, the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the formula for constructing the power conservation equation, the power conservation equation of the target monitoring period is constructed. According to the ridge regression algorithm, the total power supply and the distributed power supply are used as known quantities, and the loss is used as an unknown quantity to fit and solve the power conservation equation of the target monitoring period. , obtain the loss situation of each charging pile in each preset metering period, obtain the AC / DC loss rate in the solved loss situation, when the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is no risk of thermal runaway; when the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile in the preset metering period is that there is a risk of thermal runaway, based on the thermal runaway monitoring result and the preset metering period corresponding to the thermal runaway monitoring result, generate thermal runaway monitoring display information, and display the thermal runaway monitoring display information in real time on the preset display platform. According to the principle of energy conservation, combined with the mathematical mapping relationship established based on the station topology, the electric quantity conservation equation is constructed, and the metering operation error solution of the charging pile, the line loss evaluation of the charging station and the solution of the AC / DC conversion efficiency parameters are realized through the ridge regression algorithm, and finally the thermal runaway monitoring result of the charging pile is obtained.

[0081] Further, as a refinement and extension of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, another charging pile thermal runaway monitoring method is provided, such as Figure 4 As shown, the charging pile thermal runaway monitoring method includes:

[0082] Step 301, obtaining the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total meter measurement of the charging station, and the distributed power supply is obtained based on the distributed meter measurement at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it.

[0083] Step 302, based on a plurality of consecutive preset metering periods, a target monitoring period is determined, and an energy conservation equation is constructed according to the total power supply, the distributed power supply, and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC / DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the metering process of the distributed meter.

[0084] Step 303, according to the power conservation equation of the target monitoring period, with the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantity, solve the loss situation of each charging pile in each preset metering period, and obtain the AC and DC loss rate in the solved loss situation.

[0085] Step 304: Determine the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold.

[0086] In the above embodiment of the present application, the total power supply of the charging station and the distributed power supply of each charging pile in the charging station are obtained within the preset metering period; based on a plurality of consecutive preset metering periods, the target monitoring period is determined, and the power conservation equation is constructed according to the total power supply, distributed power supply and the loss of power in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period; according to the power conservation equation within the target monitoring period, the loss of each charging pile in each preset metering period is solved, and the AC and DC loss rate in the solved loss situation is obtained; based on the comparison result of the AC and DC loss rate with the preset AC and DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is determined. To this end, monitoring whether the charging pile has the risk of thermal runaway through big data can improve the safety of the use of the charging pile.

[0087] Step 305 , when the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, risk warning information is generated based on the location information of the charging pile with the risk of thermal runaway, and the risk warning information is sent to a preset receiving terminal.

[0088] Step 306, when the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, the real-time temperature of the charging pile is obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, thermal runaway alarm information is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm information is sent to a preset receiving terminal.

[0089] Next, when the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, risk warning information is generated based on the location information of the charging pile with the risk of thermal runaway, and the risk warning information is sent to the preset receiving terminal. At the same time, the real-time temperature of the charging pile can also be obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, thermal runaway alarm information is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm information is sent to the preset receiving terminal. To this end, by sending "risk warning" and "runaway alarm" information according to different situations, different solutions can be implemented according to different monitoring results. When there is a risk of thermal runaway, the relevant processing personnel are promptly informed to pay attention to the abnormal charging pile and replace the components immediately to avoid the subsequent actual occurrence of thermal runaway. When risks are found, the real-time temperature of the charging pile can also be combined to determine whether thermal runaway has occurred, so that monitoring can be carried out in the entire process of the early and late stages of thermal runaway, expanding the monitoring period range.

[0090] By applying the technical solution of this embodiment, the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within the preset metering period are obtained. Based on multiple consecutive preset metering periods, the target monitoring period is determined. According to the total power supply, distributed power supply and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, the power conservation equation is constructed. According to the power conservation equation within the target monitoring period, the loss of each charging pile in each preset metering period is solved, and the AC and DC loss rate in the solved loss situation is obtained. Based on the comparison result of the AC and DC loss rate with the preset AC and DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is determined. When the thermal runaway monitoring result of the charging pile is that there is a risk of thermal runaway, risk warning information is generated based on the location information of the charging pile with the risk of thermal runaway, and the risk warning information is sent to the preset receiving terminal. When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, the real-time temperature of the charging pile is obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, a thermal runaway alarm message is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm message is sent to the preset receiving terminal. By monitoring the entire process in the early stage of the risk of thermal runaway and in the later stage when thermal runaway has been determined to occur, the monitoring stability is improved.

[0091] Further, as Figure 1 The specific implementation of the charging pile thermal runaway monitoring method, the embodiment of the present application provides a charging pile thermal runaway monitoring device, such as Figure 5 As shown, the charging pile thermal runaway monitoring device includes:

[0092] The metering power acquisition module 401 is used to obtain the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter of the charging station, and the sub-power supply is obtained based on the sub-power meter at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it;

[0093] The balance equation construction module 402 is used to determine the target monitoring period based on a plurality of consecutive preset metering periods, and to construct the power conservation equation according to the total power supply, the sub-power supply and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC / DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the process of the sub-meter metering;

[0094] The equation fitting and solving module 403 is used to solve the loss situation of each charging pile in each preset metering period according to the power conservation equation of the target monitoring period, taking the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantity, and obtain the AC and DC loss rates in the solved loss situation;

[0095] The thermal runaway monitoring module 404 is used to determine the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold.

[0096] Optionally, the equilibrium equation building module 402 is further used for:

[0097] According to the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the formula for constructing the power conservation equation during the target monitoring period, the power conservation equation for the target monitoring period is constructed, wherein the formula for constructing the power conservation equation is:

[0098] ,

[0099] To include The total power supply during the target monitoring period of the preset metering period, is the total number of charging piles, For the The measurement loss rate of the sub-meters of each charging pile, For the The first The power supply of each charging pile, For the The first The AC and DC loss rate of each charging pile, For the The total power consumption of the charging station during each preset metering period.

[0100] Optionally, the equation fitting and solving module 403 is further used for:

[0101] According to the ridge regression algorithm, the total power supply and the distributed power supply are taken as known quantities, and the loss situation is taken as the unknown quantity, and the power conservation equation of the target monitoring period is fitted and solved to obtain the loss situation of each charging pile in each preset metering period.

[0102] Optionally, the thermal runaway monitoring module 404 is further used to:

[0103] When the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is no risk of thermal runaway;

[0104] When the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is a risk of thermal runaway.

[0105] Furthermore, the present application provides another charging pile thermal runaway monitoring device, such as Figure 6 As shown, the charging pile thermal runaway monitoring device includes:

[0106] The metering power acquisition module 401 is used to obtain the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter of the charging station, and the sub-power supply is obtained based on the sub-power meter at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it;

[0107] The balance equation construction module 402 is used to determine the target monitoring period based on a plurality of consecutive preset metering periods, and to construct the power conservation equation according to the total power supply, the sub-power supply and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC / DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the process of the sub-meter metering;

[0108] The equation fitting and solving module 403 is used to solve the loss situation of each charging pile in each preset metering period according to the power conservation equation of the target monitoring period, taking the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantity, and obtain the AC and DC loss rates in the solved loss situation;

[0109] The thermal runaway monitoring module 404 is used to determine the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold;

[0110] A monitoring result display module 405, for generating thermal runaway monitoring display information based on the thermal runaway monitoring result and the preset metering period corresponding to the thermal runaway monitoring result, and displaying the thermal runaway monitoring display information in real time on a preset display platform;

[0111] The monitoring information sending module 406 is used to generate risk warning information based on the location information of the charging pile with the risk of thermal runaway when the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, and send the risk warning information to a preset receiving terminal.

[0112] Optionally, the equilibrium equation building module 402 is further used for:

[0113] According to the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the formula for constructing the power conservation equation during the target monitoring period, the power conservation equation for the target monitoring period is constructed, wherein the formula for constructing the power conservation equation is:

[0114] ,

[0115] To include The total power supply during the target monitoring period of the preset metering period, is the total number of charging piles, For the The measurement loss rate of the sub-meters of each charging pile, For the The first The power supply of each charging pile, For the The first The AC and DC loss rate of each charging pile, For the The total power consumption of the charging station during the preset metering period.

[0116] Optionally, the equation fitting and solving module 403 is further used for:

[0117] According to the ridge regression algorithm, the total power supply and the distributed power supply are taken as known quantities, and the loss situation is taken as the unknown quantity, and the power conservation equation of the target monitoring period is fitted and solved to obtain the loss situation of each charging pile in each preset metering period.

[0118] Optionally, the thermal runaway monitoring module 404 is further used to:

[0119] When the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is no risk of thermal runaway;

[0120] When the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is a risk of thermal runaway.

[0121] Optionally, the monitoring information sending module 406 is further used to:

[0122] When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, the real-time temperature of the charging pile is obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, thermal runaway alarm information is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm information is sent to a preset receiving terminal.

[0123] It should be noted that for other corresponding descriptions of the functional units involved in the charging pile thermal runaway monitoring device provided in the embodiment of the present application, reference can be made to Figure 1 , Figure 3 and Figure 4 The corresponding description in the charging pile thermal runaway monitoring method will not be repeated here.

[0124] Based on the above Figure 1 , Figure 3 and Figure 4 The charging pile thermal runaway monitoring method shown in the figure, accordingly, the embodiment of the present application also provides a storage medium on which a computer program is stored, and when the computer program is executed by the processor, the above-mentioned Figure 1 , Figure 3 and Figure 4 The charging pile thermal runaway monitoring method shown.

[0125] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the charging pile thermal runaway monitoring method described in each implementation scenario of the present application.

[0126] Based on the above Figure 1 , Figure 3 and Figure 4 The charging pile thermal runaway monitoring method shown, and Figure 5 , Figure 6In order to achieve the above-mentioned purpose, the embodiment of the present application further provides a computer device, which can be a personal computer, a server, a network device, etc. The computer device includes a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to achieve the above-mentioned Figure 1 , Figure 3 and Figure 4 The charging pile thermal runaway monitoring method shown.

[0127] Optionally, the computer device may also include a user interface, a network interface, a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display, an input unit such as a keyboard, etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a Bluetooth interface, a WI-FI interface), etc.

[0128] Those skilled in the art will appreciate that the computer device structure provided in this embodiment does not limit the computer device, and may include more or fewer components, or a combination of certain components, or different component arrangements.

[0129] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages and saves the hardware and software resources of the computer device, and supports the operation of information processing programs and other software and / or programs. The network communication module is used to realize communication between the components inside the storage medium, and communication with other hardware and software in the physical device.

[0130] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general hardware platforms, or by hardware to obtain the total power supply of the charging station and the distributed power supply of each charging pile in the charging station within the preset metering period; based on a plurality of consecutive preset metering periods, determine the target monitoring period, and construct the power conservation equation according to the total power supply, distributed power supply and the loss of power delivered by the charging station to the charging pile in each preset metering period within the target monitoring period; according to the power conservation equation within the target monitoring period, solve the loss of each charging pile in each preset metering period, and obtain the AC / DC loss rate in the solved loss situation; based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold, determine the thermal runaway monitoring result of the charging pile within the preset metering period. Monitoring whether the charging pile has the risk of thermal runaway through big data can improve the safety of the use of the charging pile.

[0131] Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the description of the implementation scenario, or can be changed accordingly and located in one or more devices different from the present implementation scenario. The modules of the above-mentioned implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0132] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A charging pile thermal runaway monitoring method, characterized in that: The charging pile thermal runaway monitoring method comprises: Obtaining the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter of the charging station, and the sub-power supply is obtained based on the sub-power meter at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it; Based on a plurality of consecutive preset metering periods, a target monitoring period is determined, and according to the total power supply, the distributed power supply and the loss in the process of the charging station transmitting power to the charging pile in each preset metering period within the target monitoring period, an energy conservation equation is constructed, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC and DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the process of metering by the distributed meter; According to the power conservation equation of the target monitoring period, the total power supply and the distributed power supply are known quantities, and the loss situation is unknown quantity, the loss situation of each charging pile in each preset metering period is solved, and the AC and DC loss rates in the solved loss situation are obtained; Based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is determined.

2. The charging pile thermal runaway monitoring method according to claim 1, characterized in that: The power conservation equation is constructed according to the total power supply, the distributed power supply and the loss in the process of transmitting power from the charging station to the charging pile in each preset metering period within the target monitoring period, including: According to the total power supply in each preset metering period, the distributed power supply of each charging pile, the loss in the process of transmitting power from the charging station to the charging pile, and the formula for constructing the power conservation equation during the target monitoring period, the power conservation equation for the target monitoring period is constructed, wherein the formula for constructing the power conservation equation is: ， To include The total power supply during the target monitoring period of the preset metering period, is the total number of charging piles, For the The measurement loss rate of the sub-meters of each charging pile, For the The first The power supply of each charging pile, For the The first The AC and DC loss rate of each charging pile, For the The total power consumption of the charging station during the preset metering period.

3. The charging pile thermal runaway monitoring method according to claim 1, characterized in that: The method of solving the loss situation of each charging pile in each preset metering period according to the power conservation equation of the target monitoring period, taking the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantities, comprises: According to the ridge regression algorithm, the total power supply and the distributed power supply are taken as known quantities, and the loss situation is taken as the unknown quantity, and the power conservation equation of the target monitoring period is fitted and solved to obtain the loss situation of each charging pile in each preset metering period.

4. The charging pile thermal runaway monitoring method according to claim 1, characterized in that: The determining the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold comprises: When the calculated AC / DC loss rate is less than or equal to the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is no risk of thermal runaway; When the calculated AC / DC loss rate is greater than the preset AC / DC loss rate threshold, the thermal runaway monitoring result of the charging pile within the preset metering period is that there is a risk of thermal runaway.

5. The charging pile thermal runaway monitoring method according to claim 1, characterized in that: After determining the thermal runaway monitoring result of the charging pile within the preset metering period, the charging pile thermal runaway monitoring method further includes: Based on the thermal runaway monitoring result and the preset metering period corresponding to the thermal runaway monitoring result, thermal runaway monitoring display information is generated, and the thermal runaway monitoring display information is displayed in real time on a preset display platform.

6. The charging pile thermal runaway monitoring method according to claim 1, characterized in that: After determining the thermal runaway monitoring result of the charging pile within the preset metering period, the charging pile thermal runaway monitoring method further includes: When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, risk warning information is generated based on the location information of the charging pile with the risk of thermal runaway, and the risk warning information is sent to a preset receiving terminal.

7. The charging pile thermal runaway monitoring method according to any one of claims 1 to 6, characterized in that: After determining the thermal runaway monitoring result of the charging pile within the preset metering period, the charging pile thermal runaway monitoring method further includes: When the thermal runaway monitoring result of the charging pile indicates that there is a risk of thermal runaway, the real-time temperature of the charging pile is obtained. When the real-time temperature of the charging pile exceeds the preset temperature threshold, thermal runaway alarm information is generated based on the location information of the charging pile that exceeds the preset temperature threshold, and the thermal runaway alarm information is sent to a preset receiving terminal.

8. A charging pile thermal runaway monitoring device, characterized in that: The charging pile thermal runaway monitoring device comprises: A metering power acquisition module is used to obtain the total power supply of the charging station and the sub-power supply of each charging pile in the charging station within a preset metering period, wherein the total power supply is obtained based on the total power meter of the charging station, and the sub-power supply is obtained based on the sub-power meter at the output end of the charging pile, and the charging pile converts the AC power transmitted by the charging station into DC power and then outputs it; A balance equation construction module is used to determine a target monitoring period based on a plurality of consecutive preset metering periods, and to construct an energy conservation equation according to the total power supply, the distributed power supply, and the loss of the power delivered by the charging station to the charging pile in each preset metering period within the target monitoring period, wherein the loss includes the total power loss in the process of the charging station outputting power to the charging pile, the AC / DC loss rate in the process of the charging pile converting AC power into DC power, and the metering loss rate in the metering process of the distributed meter; An equation fitting and solving module is used to solve the loss situation of each charging pile in each preset metering period according to the power conservation equation of the target monitoring period, with the total power supply and the distributed power supply as known quantities and the loss situation as unknown quantity, and obtain the AC and DC loss rates in the solved loss situation; The thermal runaway monitoring module is used to determine the thermal runaway monitoring result of the charging pile within a preset metering period based on the comparison result of the AC / DC loss rate and the preset AC / DC loss rate threshold.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the charging pile thermal runaway monitoring method according to any one of claims 1 to 7 is implemented.

10. A computer device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the charging pile thermal runaway monitoring method described in any one of claims 1 to 7 is implemented.

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