Remote control device, method and equipment for new energy charging cable

Abstract

The invention discloses a remote control device, method and equipment for a new energy charging cable, and belongs to the technical field of electric power facilities. The device comprises a power data acquisition module for acquiring input power data of a new energy charging cable at a vehicle end and output power data of a charging pile end; the power loss calculation module is used for calculating the power loss of the charging cable according to a power difference value between the output power data and the input power data; the state information sending module is used for generating temperature state information of the charging cable according to the power loss and sending the temperature state information to the remote control end; and the remote control execution module is used for controlling the charging current of the charging cable based on a control instruction fed back by the temperature state information. According to the technical scheme, the remote control instruction can be generated according to the monitored power data, so that charging of the new energy vehicle is reasonably controlled, the safety of the charging process is improved, the service life of the charging cable is prolonged, and the charging efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electric power facilities, and specifically relates to a remote control device, method and equipment for a new energy charging cable. Background Art

[0002] With the rapid development of science and technology, the number of new energy vehicles has increased dramatically in a few years, and the charging equipment for new energy vehicles has also increased.

[0003] For the charging cables used in the charging process of new energy vehicles, due to the increasing requirements for charging efficiency, the charging power carried by the charging cables is often large. In some cases, such as charging cable failure or other reasons, the temperature of the charging cable will rise, which often causes the charging power to fail to meet the expected standards. In addition, the temperature rise will have a direct impact on the operating safety of the charging cable and the aging of the insulation layer of the charging cable. Therefore, how to monitor the charging power of the charging cable and perform reasonable remote control based on the monitoring data is an important factor in the safe operation of the charging cable. It can also provide car owners with a better user experience and avoid energy waste. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a remote control device, method and equipment for a new energy charging cable, with the purpose of generating remote control instructions based on the monitored power data through real-time monitoring of the charging power of the charging cable, so as to reasonably control the charging of new energy vehicles, improve the safety of the charging process, extend the service life of the charging cable, improve the charging efficiency and avoid energy waste.

[0005] In a first aspect, an embodiment of the present application provides a remote control device for a new energy charging cable, the device comprising:

[0006] The power data acquisition module acquires the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable;

[0007] a power loss calculation module, configured to calculate a charging cable power loss according to a power difference between the output power data and the input power data;

[0008] a status information sending module, configured to generate a collection instruction for the temperature status information of the charging cable according to the power loss, and send the temperature status information to a remote control terminal;

[0009] The remote control execution module is used to control the charging current of the charging cable after receiving the control instruction fed back by the remote control terminal based on the temperature status information.

[0010] Further, the device further includes:

[0011] A correspondence relationship construction module, configured to construct a correspondence relationship between power loss and temperature level when the charging cable is in normal connection;

[0012] The status information sending module is specifically configured to generate temperature status information of the charging cable according to the power loss and the pre-constructed correspondence relationship between power loss and temperature level.

[0013] Further, the device further includes:

[0014] A real-time current acquisition module, configured to acquire the real-time current of the charging cable;

[0015] A pressure difference calculation module, configured to calculate the pressure difference between the charging pile end and the vehicle end of the charging cable according to the real-time current, the input power data, and the output power data;

[0016] A resistance calculation module, configured to calculate the measured resistance of the charging cable according to the pressure difference;

[0017] An abnormal warning module, configured to determine the resistance change situation according to the difference between the measured circuit and the theoretical resistance of the charging cable, and perform an abnormal warning when the resistance change situation exceeds a preset difference range.

[0018] Further, the abnormal warning module is specifically configured to:

[0019] Obtain the core parameters of the charging cable; wherein, the core parameters include core material and wire diameter value;

[0020] Determine the theoretical resistance of the charging cable according to the core parameters, and determine the preset difference range of the charging cable.

[0021] Further, the device further includes:

[0022] A charging cable fault identification module, configured to determine whether the current power loss of the charging cable corresponds to a charging cable fault according to the pre-constructed correspondence relationship between power loss and charging cable fault.

[0023] Further, the device further includes:

[0024] A contact looseness identification module, configured to analyze the continuously collected input power data and output power data within a preset time period, and identify whether there is a looseness phenomenon at the contact position of the charging cable.

[0025] Further, the device further includes:

[0026] A control instruction storage module, used for storing the control instructions;

[0027] The synchronization module is used to synchronize the control instruction and the response information made to the control instruction to the intelligent terminal device used by the user.

[0028] In a second aspect, an embodiment of the present application provides a remote control method for a new energy charging cable, the method comprising:

[0029] The input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable;

[0030] Calculating a charging cable power loss according to a power difference between the output power data and the input power data;

[0031] generating temperature status information of the charging cable according to the power loss, and sending the temperature status information to a remote control terminal;

[0032] After receiving the control instruction fed back by the remote control terminal based on the temperature status information, the charging current of the charging cable is controlled.

[0033] Furthermore, before generating the temperature status information of the charging cable according to the power loss, the method further includes:

[0034] When the charging cable is connected normally, establishing a corresponding relationship between power loss and temperature level;

[0035] Accordingly, generating the temperature status information of the charging cable according to the power loss includes:

[0036] The temperature status information of the charging cable is generated according to the power loss and a pre-established correspondence relationship between the power loss and the temperature level.

[0037] In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0038] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0039] In a fifth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect.

[0040] In the embodiment of the present application, the power data acquisition module acquires the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable; the power loss calculation module is used to calculate the power loss of the charging cable according to the power difference between the output power data and the input power data; the status information sending module is used to generate a collection instruction for the temperature status information of the charging cable according to the power loss, and send the temperature status information to the remote control end; the remote control execution module is used to control the charging current of the charging cable after receiving the control instruction based on the temperature status information feedback from the remote control end. The above technical scheme can reasonably control the charging of new energy vehicles by real-time monitoring of the charging power of the charging cable and generating remote control instructions according to the monitored power data, thereby improving the safety of the charging process, extending the service life of the charging cable, and improving the charging efficiency while avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a remote control device for a new energy charging cable provided in Embodiment 1 of the present application;

[0042] Figure 2 It is a structural schematic diagram of a remote control device for a new energy charging cable provided in Embodiment 2 of the present application;

[0043] Figure 3 It is a flowchart of a remote control method for a new energy charging cable provided in Embodiment 3 of the present application;

[0044] Figure 4 It is a schematic diagram of the structure of the electronic device provided in Example 4 of the present application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for the convenience of description, only the part related to the present application but not all of the content is shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. The process can be terminated when its operation is completed, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0047] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0048] In the following, in conjunction with the accompanying drawings, the remote control device, method and equipment of the new energy charging cable provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0049] Embodiment 1

[0050] Figure 1 Schematic diagram of the structure of the remote control device of the new energy charging cable provided in the first embodiment of the present application. Figure 1 As shown, the device comprises:

[0051] The power data acquisition module 110 acquires the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable;

[0052] A power loss calculation module 120, configured to calculate a charging cable power loss according to a power difference between the output power data and the input power data;

[0053] a status information sending module 130, configured to generate a collection instruction for the temperature status information of the charging cable according to the power loss, and send the temperature status information to a remote control terminal;

[0054] The remote control execution module 140 is used to control the charging current of the charging cable after receiving the control instruction fed back by the remote control terminal based on the temperature status information.

[0055] The power data acquisition module 110 is used to collect input power data and output power data.

[0056] Among them, the input power data can be the data about charging power collected from the vehicle end when the new energy charging cable is working, which represents the power situation of electric energy flowing into the vehicle, that is, the actual power received by the vehicle when charging.

[0057] The output power data may be the power data collected at the charging pile end, which reflects the power of the electric energy output by the charging pile, that is, the initial power value when the electric energy starts from the charging pile and is ready to be transmitted to the vehicle through the charging cable.

[0058] The power data acquisition module 110 can adopt multi-channel data acquisition technology, and directly connect the vehicle charging circuit electrically through a high-precision, high-bandwidth power sensor at the vehicle end, sense and collect the current and voltage signals flowing into the vehicle in real time, and then use the built-in high-speed data processing chip to quickly and accurately calculate and extract the input power data according to the power calculation formula: power = voltage × current. At the charging pile end, a professional power measurement sensor adapted to it is also configured, which is closely connected to the output circuit of the charging pile, and the output power data is collected with similar principles and data processing procedures. In addition, in order to ensure the accuracy and real-time nature of the data, synchronous sampling technology is adopted to allow data collection at the vehicle end and the charging pile end to be carried out under the same time reference, avoiding data deviation caused by time differences, thereby accurately obtaining the power data at both ends of the new energy charging cable during operation.

[0059] The power loss calculation module 120 is used to calculate the power loss value during the power transmission process according to the input power data and the output power data.

[0060] The power difference can be the result of subtracting the output power data from the input power data. This difference intuitively reflects the power loss in the charging cable. Because in the process from the output of the charging pile to the reception of the vehicle, theoretically if there is no loss, the two should be equal. The difference is a direct reflection of the power loss generated by the charging cable.

[0061] The power loss of the charging cable, that is, the part of the electrical energy lost in the form of heat energy, etc., reflects the transmission efficiency of the cable and its possible working status. It is an important reference indicator for subsequent evaluation of whether the cable needs to adjust the charging current and other operations.

[0062] The power loss calculation module 120 can use an intelligent algorithm to automatically extract the received output power data and input power data, and then use a high-precision numerical calculation program to strictly follow the power loss calculation formula: power loss = output power data - input power data, perform difference calculation, and obtain an accurate power difference. This difference is identified as the power loss of the charging cable. During the calculation process, in order to avoid the accumulation of data calculation errors, floating-point calculation optimization technology can be used to optimize the data storage format and calculation rules to ensure the high accuracy of the power loss calculation results, thereby accurately quantifying the power loss of the charging cable.

[0063] The status information sending module 130 is used to calculate corresponding temperature status information based on the power loss data.

[0064] Temperature status information can be descriptive information about the temperature of the charging cable inferred based on the power loss situation, such as whether the temperature is within the normal range, whether there is a risk of overheating, etc. It can intuitively reflect the current thermal status of the charging cable, allowing the remote control end to understand the working status of the cable and make corresponding decisions.

[0065] The remote control end can be a control system that can receive and process the status information related to the charging cable, and can issue control instructions to the on-site charging equipment based on this information. It is usually composed of a server, monitoring software and related operation interfaces, etc., to achieve centralized remote control of multiple charging stations, charging cables, etc.

[0066] The status information sending module 130 can first obtain power loss data based on an intelligent status assessment algorithm established based on big data analysis and thermal models, and then input it into the intelligent algorithm. The algorithm analyzes the current power loss based on a large amount of past data on the correspondence between power loss and temperature change of charging cables, combined with a thermal model established based on thermal principles such as heat conduction and thermal radiation, so as to accurately infer the temperature status of the charging cable and generate temperature status information containing key contents such as temperature range and temperature change trend.

[0067] In this solution, reliable network communication technologies, such as 5G-based IoT communication protocols, are used to ensure a stable, high-speed, and low-latency communication link with the remote control terminal. After the temperature status information is generated, the information is immediately packaged in the prescribed data format, and necessary checksums are added to ensure data integrity. The information is then accurately sent to the remote control terminal through the communication link so that the remote control terminal can obtain and process the relevant information in a timely manner.

[0068] The remote control execution module 140 can be deployed at the remote control end. It is a remote terminal system that can receive the charging cable status information and issue control instructions. According to the temperature status information obtained from the status information sending module 130, it formulates corresponding control instructions after comprehensively considering various factors, aiming to ensure the normal operation of the charging cable and the reasonable charging.

[0069] The control instruction may be an operation instruction formulated and issued by the remote control terminal based on factors such as the temperature status information of the charging cable. The content of the control instruction clearly stipulates the adjustment requirements for the charging current of the charging cable, such as whether to increase the current, reduce the current or maintain the current current.

[0070] During the new energy charging process, the current flowing to the vehicle battery through the charging cable directly affects the charging speed, the power loss of the charging cable, and the charging status of the battery. It is one of the key controllable parameters in the entire charging process.

[0071] The remote control execution module 140 can monitor the communication link from the remote control end in real time. Once control instruction data is received, it will immediately receive, unpack and perform integrity checks on the data to ensure that the received control instructions are accurate, complete and usable.

[0072] After receiving the control command, the charging current is precisely adjusted according to the requirements of the control command through the built-in intelligent current regulation algorithm and high-precision power electronic control equipment, such as using IGBT modules as power regulation switch elements. If the command requires an increase in current, the algorithm will calculate the appropriate adjustment step size, and gradually and steadily increase the charging current by controlling parameters such as the on-time of the power electronic equipment; conversely, if the current is required to be reduced, the current is reduced according to the corresponding strategy. In addition, during the adjustment process, the actual changes in the charging current are monitored in real time, and the feedback control mechanism is used to ensure that the current regulation can accurately reach the target value required by the command, thereby achieving effective control of the charging current of the charging cable and ensuring the rationality, safety and efficiency of the charging process.

[0073] The technical solution provided in this embodiment includes a power data acquisition module, which acquires the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable; a power loss calculation module, which is used to calculate the power loss of the charging cable according to the power difference between the output power data and the input power data; a status information sending module, which is used to generate a collection instruction for the temperature status information of the charging cable according to the power loss, and send the temperature status information to the remote control end; and a remote control execution module, which is used to control the charging current of the charging cable after receiving the control instruction based on the temperature status information feedback from the remote control end. The above technical solution can reasonably control the charging of new energy vehicles by real-time monitoring of the charging power of the charging cable and generating remote control instructions according to the monitored power data, thereby improving the safety of the charging process, extending the service life of the charging cable, and improving the charging efficiency while avoiding energy waste.

[0074] In the above embodiment, optionally, the device further includes:

[0075] a corresponding relationship building module, configured to build a corresponding relationship between power loss and temperature level when the charging cable is in a normal connection;

[0076] The status information sending module is specifically configured to generate the temperature status information of the charging cable according to the power loss and a pre-established correspondence between the power loss and the temperature level.

[0077] The temperature level can be a classification of the temperature conditions of the charging cable. For example, it can be divided into low temperature, normal temperature, high temperature and too high temperature. Each level corresponds to a certain temperature range. This classification method can more intuitively and clearly describe the thermal state of the charging cable, which is convenient for subsequent rapid judgment of its approximate temperature condition based on the power loss situation.

[0078] In this solution, when the charging cable is connected normally and in the charging working state, the temperature data of the cable can be collected in real time and at multiple points through high-precision temperature sensors arranged at different positions of the charging cable. At the same time, the power loss value obtained at the same time is matched and collected with the corresponding temperature measurement value in combination with the power loss value. Then, a large number of such matched data groups are analyzed and processed using the clustering algorithm in big data analysis and machine learning, and they are divided into different temperature levels according to the temperature value range, and then the corresponding relationship between power loss and each temperature level is sorted out. For example, after a long period of data collection and analysis, it is found that when the power loss is in a certain small value range, the corresponding temperature level is normal temperature; and when the power loss increases to another value range, the temperature level becomes high. In this way, the accurate correspondence between the two is gradually constructed and stored in the system database for subsequent use at any time.

[0079] The temperature status information may include the current temperature level of the charging cable and possible temperature change trends, etc. It can comprehensively and intuitively present the thermal status of the charging cable, allowing the remote control end to clearly understand the working conditions of the cable without the need to be on site, so as to implement targeted remote control measures.

[0080] First, the power loss value calculated in real time by the power loss calculation module is obtained, and then it is compared with the pre-built and stored correspondence between power loss and temperature level to determine the corresponding temperature level interval that the current power loss value falls into, and then the temperature status information containing key contents such as the corresponding temperature level description and the temperature change trend inferred based on the recent power loss change trend is generated.

[0081] The following is some sample execution code of this solution:

[0082]

[0083]

[0084]

[0085]

[0086] In the above code, the RelationBuilder class implements the function of the corresponding relationship building module. Its build_relation method receives a list of power loss values ​​and a list of corresponding temperature values, first organizes them into a DataFrame, then divides the temperature levels according to the set temperature range, and finally determines the power loss range corresponding to each temperature level through group statistics, thereby building a corresponding relationship and storing it in self.relation_data.

[0087] The StateInfoSender class implements the function of the state information sending module. Its constructor receives an instance of RelationBuilder. In the generate_temperature_state_info method, the current power loss value is compared with the pre-built corresponding relationship to determine the temperature level to which it belongs, and then the corresponding temperature state information is generated and returned.

[0088] This solution establishes a correspondence between power loss and temperature level through a correspondence construction module, which can accurately determine the temperature status information, realize intelligent and precise calculation, and improve the safety and reliability of the entire charging cable by obtaining control instructions from the remote control end.

[0089] Embodiment 2

[0090] This embodiment is further optimized on the basis of the above embodiment, and the specific optimization is: the device also includes: a real-time current acquisition module, used to obtain the real-time current of the charging cable; a pressure difference calculation module, used to calculate the pressure difference between the charging pile end and the vehicle end of the charging cable according to the real-time current, the input power data and the output power data; a resistance calculation module, used to calculate the measured resistance of the charging cable according to the pressure difference; an abnormal warning module, used to determine the resistance change according to the difference between the measurement circuit and the theoretical resistance of the charging cable, and issue an abnormal warning when the resistance change exceeds a preset difference range. Figure 2 Schematic diagram of the structure of the remote control device of the new energy charging cable provided in the second embodiment of the present application. Figure 2 As shown, the device comprises:

[0091] The power data acquisition module 210 acquires the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable;

[0092] A power loss calculation module 220, configured to calculate a charging cable power loss according to a power difference between the output power data and the input power data;

[0093] A status information sending module 230, configured to generate a collection instruction for the temperature status information of the charging cable according to the power loss, and send the temperature status information to a remote control terminal;

[0094] A remote control execution module 240, configured to control the charging current of the charging cable after receiving a control instruction from the remote control terminal based on the temperature status information feedback;

[0095] A real-time current acquisition module 250, used to acquire the real-time current of the charging cable;

[0096] A pressure difference calculation module 260, configured to calculate the pressure difference between the charging pile end and the vehicle end of the charging cable according to the real-time current, the input power data and the output power data;

[0097] a resistance calculation module 270, configured to calculate a measured resistance of the charging cable according to the pressure difference;

[0098] The abnormal warning module 280 is used to determine the resistance change according to the difference between the measurement circuit and the theoretical resistance of the charging cable, and to issue an abnormal warning when the resistance change exceeds a preset difference range.

[0099] Among them, the real-time current can be the actual current flowing through the charging cable at a certain moment in the new energy charging process. It will change dynamically with factors such as the charging stage, the status of the charging equipment, and the battery charging requirements.

[0100] This solution can collect real-time current data through high-precision, low-power current sensors. Current sensors are usually installed at specific locations on charging cables, tightly coupled with the conductive core of the cable, and can sense current changes using electromagnetic induction principles or mechanisms such as the Hall effect, and convert them into corresponding electrical signals, which are then converted into digital signals through built-in analog-to-digital conversion circuits.

[0101] The voltage difference between the two ends of the charging cable (charging pile end and vehicle end) can be calculated based on the real-time current, input power data and output power data.

[0102] The input power data may be charging power data collected from the vehicle side, and the output power data may be power data collected from the charging pile side.

[0103] This solution can activate the voltage difference between the charging pile end and the vehicle end, and can further calculate the resistance of the charging cable, and then judge the working status of the cable.

[0104] The pressure difference value obtained by the pressure difference calculation module can be used to calculate the measured resistance of the charging cable.

[0105] The measured resistance can be the current resistance value of the charging cable obtained through actual measurement and related calculations. By comparing it with the theoretical resistance value of the cable, it can be found whether there is an abnormal change in the resistance of the cable, such as an increase in resistance due to cable aging, local damage, etc. This can be used as an important indicator to determine whether the cable is working normally.

[0106] Theoretical resistance can be the expected resistance value of the charging cable under normal conditions, based on its own physical properties such as material, length, cross-sectional area, and factors such as ambient temperature, according to the resistance calculation formula (resistance is proportional to material resistivity and length, and inversely proportional to cross-sectional area). If the measured resistance deviates too much from the theoretical resistance, it often means that there is something wrong with the cable.

[0107] The resistance change can be the change trend and amplitude of the measured resistance relative to the theoretical resistance, such as whether it increases or decreases, and the specific value of the change. By analyzing the resistance change, it can be determined whether the cable has abnormal problems such as aging, damage or poor contact.

[0108] The preset difference range can be a numerical range pre-set in the system that allows a deviation between the measured resistance and the theoretical resistance. It is the limit for judging whether the cable resistance is in a normal state. When the resistance change exceeds this range, it is considered that the cable has an abnormal condition and an early warning needs to be issued to prompt.

[0109] When the resistance change exceeds the preset difference range, the abnormal warning can be sent to the relevant operation and maintenance personnel, management personnel or monitoring system through sound, pop-up window, SMS or push message, informing them that there may be abnormalities in the charging cable so that they can take corresponding inspection, maintenance and other measures in time to ensure the normal operation of the charging system.

[0110] On the basis of the above technical solution, optionally, the abnormal warning module is specifically used to:

[0111] Acquire the core parameters of the charging cable; wherein the core parameters include the core material and the wire diameter value;

[0112] The theoretical resistance of the charging cable is determined according to the core parameters, and a preset difference range of the charging cable is determined.

[0113] The core material can be the type of conductive material that constitutes the core of the charging cable, and common ones are copper, aluminum, etc. Different core materials have different resistivities. For example, the resistivity of copper is relatively low, and the resistivity of aluminum is relatively high, which directly affects the size of the theoretical resistance of the cable.

[0114] The wire diameter value can be the diameter of the charging cable core, usually measured in millimeters. The wire diameter value is closely related to the cross-sectional area of ​​the cable. The cross-sectional area can be calculated from the wire diameter using the corresponding mathematical formula. The cross-sectional area is one of the important factors affecting the resistance. The resistance is inversely proportional to the cross-sectional area, so it is one of the key parameters for calculating theoretical resistance and evaluating cable performance.

[0115] This solution uses a variety of methods to obtain core parameters. For newly installed charging cables, the relevant parameter information can be directly read from the cable product specification manual or the technical data provided by the manufacturer. These data will clearly mark key contents such as the core material and wire diameter value. In addition, in some intelligent charging facilities, electronic tags with identification functions can also be installed on the charging cables. The core parameter information is pre-written in the electronic tags. The core parameter acquisition module reads the data in the tag through the corresponding radio frequency identification technology, thereby obtaining accurate core material and wire diameter value information, ensuring a reliable data basis for subsequent calculations.

[0116] Among them, the core parameters may include parameters such as core material and wire diameter, which are the basic input data for calculating theoretical resistance. Different combinations of core material and wire diameter will result in different theoretical resistance values, which determine the conductive properties of the cable and the resistance loss in the theoretical power transmission process.

[0117] In this solution, the theoretical resistance can be based on the physical properties of the cable itself, such as the core material, wire diameter, etc., according to the established resistance calculation formula. For example, for a uniform conductor, the calculation formula is:

[0118] Resistance = resistivity × length ÷ cross-sectional area;

[0119] The resistivity is determined by the core material, and the cross-sectional area can be calculated from the wire diameter. The expected resistance value calculated by this solution can be used as a benchmark for whether the actual resistance of the cable is normal. If the actual measured resistance deviates too much from the theoretical resistance, it often indicates that there is an abnormality in the cable.

[0120] This solution first obtains the core material and wire diameter numerical information from the core parameter acquisition module, and then searches for the corresponding resistivity standard value based on the known core material. These standard values ​​are usually stored in the system's material property database and are obtained through a large number of experiments and scientific measurements. At the same time, the cross-sectional area of ​​the core is calculated based on the wire diameter value. For example, for a circular core, the calculation formula is as follows:

[0121] Cross-sectional area = π × (wire diameter ÷ 2) 2 ;

[0122] Finally, based on the preset length of the cable, the theoretical resistance value of the charging cable is accurately calculated according to the resistance calculation formula.

[0123] The preset difference range can be a numerical interval set after comprehensively considering various factors. It usually includes an upper limit value and a lower limit value. For example, it can be set as a certain percentage of fluctuation above and below the theoretical resistance value or a fixed resistance value range. Such a setting can take into account various factors such as process errors in the cable manufacturing process, reasonable fluctuations in resistance under different environmental conditions, and accuracy errors of the measuring equipment itself, so as to accurately judge whether the actual change in the cable resistance is normal.

[0124] After obtaining the theoretical resistance value calculated by the theoretical resistance determination module in this solution, various factors can be comprehensively considered to set the preset difference range. For example, considering the process standards in the cable production link, referring to the allowable resistance error range of this type of cable provided by the cable manufacturer during the manufacturing process, and incorporating this reasonable manufacturing error into the consideration of the preset difference range. It can also be combined with the environmental factors where the charging cable actually operates. For example, the influence degree of temperature changes in different seasons on the resistance. Generally, the resistance increases with the increase in temperature and decreases with the decrease in temperature. According to the variation law of the thermal resistance, the resistance fluctuation range caused by temperature changes can be estimated, as well as the slow resistance change range that may be caused by factors such as aging during long-term use. In addition, the accuracy level of the resistance measuring equipment used can also be considered, and the upper and lower limits of the preset difference range can be reasonably determined according to its measurement error range. For example, for a charging cable with a theoretical resistance value of 1 ohm, after comprehensively considering the above various factors, the preset difference range is set to 0.9 ohm to 1.1 ohm. That is, when the measured resistance is within this interval, the cable resistance is considered to be in a normal state, and if it exceeds this range, it is determined to be abnormal.

[0125] This solution accurately determines the theoretical resistance and the preset difference range by obtaining the core parameters of the charging cable, making the monitoring of the charging cable resistance state more scientific and accurate. It can not only provide a reliable reference standard for actual measurement based on the theoretical resistance, but also effectively distinguish normal resistance fluctuations from abnormal changes through the reasonably set preset difference range, so as to more accurately discover potential cable faults and ensure the safety and stability of the charging process.

[0126] The technical solution provided in this embodiment realizes refined monitoring of the working state of the charging cable and early warning of faults by real-time monitoring of key parameters such as the current, pressure difference, and resistance of the charging cable, and making an abnormal warning based on the comparison between the measured resistance and the theoretical resistance. It helps to timely discover potential problems such as aging and damage of the cable, ensure the safety and reliability of the charging process, and at the same time reduce the operation and maintenance costs and safety risks caused by cable faults, and improve the stability and operation and maintenance efficiency of the entire new energy charging system.

[0127] Based on the above embodiments, optionally, the device further includes:

[0128] The charging cable fault identification module is used to determine whether the current power loss of the charging cable corresponds to a charging cable fault according to a pre-established correspondence relationship between the power loss and the charging cable fault.

[0129] Among them, the correspondence between power loss and charging cable failure can be an association rule sorted out and summarized in advance through a large amount of experimental data, past failure case analysis, and in-depth research on the operating characteristics of charging cables under different working conditions. For example, when the power loss continues to be in a certain high value range and is accompanied by abnormal temperature rise, it may correspond to a local short circuit failure of the cable core; or when the power loss fluctuates unstably and the charging current also changes abnormally, it may mean that the cable has a fault such as poor contact. This correspondence is stored in the system in the form of a database or rule table.

[0130] Charging cable fault types may include various problems that may occur during the actual use of the charging cable, such as wire core breakage, insulation damage, poor contact, short circuit, etc. These faults can lead to decreased electrical performance of the cable, abnormal power loss, and increased safety risks.

[0131] This solution can match and compare the actual value of the current charging cable's power loss with the pre-built and stored correspondence between power loss and charging cable faults to determine whether the charging cable has a fault. For example, the current power loss value falls within a certain range set by the correspondence or conforms to a certain specific change pattern, such as continuous increase, abnormal fluctuation, etc. If the power loss situation matches the fault-related characteristics defined in the correspondence, then it is determined that the current power loss corresponds to a charging cable fault, and the fault can then be notified by sending fault prompt information to the system's monitoring interface and pushing notification messages to the operation and maintenance personnel. If the power loss value is in a normal corresponding interval that is not related to the fault, it is determined that the current charging cable is in normal working condition, and the power loss can be monitored.

[0132] This solution uses the corresponding relationship between power loss and charging cable fault to accurately determine whether the cable is faulty, realizes active monitoring and rapid identification of charging cable faults, and can promptly detect problems in the early stages of a fault or before serious consequences occur, helping operation and maintenance personnel to intervene in advance and take targeted maintenance measures, thereby effectively reducing charging interruptions and equipment damage caused by charging cable faults, ensuring the stable operation of the new energy charging system, reducing operation and maintenance costs, and improving overall safety and reliability.

[0133] Based on the above embodiments, optionally, the device further includes:

[0134] The loose contact identification module is used to analyze the input power data and the output power data continuously collected within a preset time period to identify whether the contact position of the charging cable is loose.

[0135] Among them, the input power data can be the data about charging power collected from the vehicle end when the new energy charging cable is working, which reflects the power situation of electric energy flowing into the vehicle. Its numerical change can reflect the state change of the charging circuit to a certain extent. For example, loose contact may cause abnormal fluctuations in the power received by the vehicle end.

[0136] The output power data is the power data collected at the charging pile end, which reflects the power of the charging pile outputting electric energy. Combined with the input power data, it helps to discover power transmission abnormalities caused by contact problems by observing the correlation changes between the two.

[0137] The preset duration can be a pre-set time interval. During this time period, power data is continuously collected for comprehensive analysis. By observing the changing trend of data over a period of time and other characteristics, it can be determined whether there is loose contact. For example, it can be set to a few minutes or tens of minutes, etc. The specific duration will be determined based on the characteristics of the charging system and actual needs.

[0138] The loose contact position phenomenon may be caused by various reasons, such as frequent plugging and unplugging, long-term vibration, loose installation, etc., which make the contact points no longer fit tightly, resulting in gaps and increasing contact resistance. This phenomenon will reduce the efficiency of power transmission, cause power fluctuations, and may even cause safety hazards such as heating and ignition.

[0139] This solution can obtain the input power data and output power data collected continuously within a preset time. Then, the data analysis algorithm is used to process these data, such as calculating the statistical characteristics of the power data such as the average value, standard deviation, and fluctuation frequency, while observing the trend of the data over time, drawing the power change curve, etc. Under normal circumstances, during the charging process, if the contact is good, the input power data and the output power data should be relatively stable, and the difference between the two is also within a reasonable range. When there is a loose contact position, the contact resistance will increase, resulting in additional power loss, making the input power data drop more significantly than the output power data, and the fluctuation of the power data will also increase, and statistical indicators such as the standard deviation and fluctuation frequency will exceed the normal range. Compare the data characteristics obtained by the actual analysis with the reference characteristics under normal conditions. If the data is found to have the above-mentioned abnormal fluctuations, unreasonable differences and other characteristic changes, it can be identified that the contact position of the charging cable is loose, and then feedback is provided by sending alarm prompts to the monitoring system, so that corresponding treatment measures such as tightening the connection and replacing components can be taken in time.

[0140] This solution adds a loose contact identification module, which identifies loose contact phenomena by analyzing the input and output power data within a preset time period. It can promptly and accurately detect possible poor contact problems at the connection points of the charging cable, and avoid safety hazards such as increased power loss, reduced charging efficiency, and heat and sparks caused by loose contact.

[0141] Based on the above embodiments, optionally, the device further includes:

[0142] A control instruction storage module, used for storing the control instructions;

[0143] The synchronization module is used to synchronize the control instruction and the response information made to the control instruction to the intelligent terminal device used by the user.

[0144] Among them, the control instruction can be an operation instruction formulated and issued by the remote control terminal based on many factors such as the temperature status information and resistance change of the charging cable, which is used to adjust relevant parameters such as the charging current of the charging cable, for example, whether to increase the current, reduce the current or maintain the current current.

[0145] In this solution, a database management system, such as a relational database MySQL or a non-relational database MongoDB, can be used to build a storage structure. When a control instruction is received, it is parsed according to the established data format to extract key information in the instruction, such as the instruction release time, the charging cable number to which the instruction is directed, and the specific control content, such as the specific value of the current adjustment, etc., and organized into corresponding data records and stored in the corresponding table of the database. At the same time, in order to facilitate data retrieval and management, appropriate indexes will be set for the data records, such as indexing in chronological order or indexing by charging cable number, etc., to ensure that when it is necessary to query the control instruction history of a specific charging cable or all control instructions within a specific time period, the corresponding data can be obtained quickly and accurately.

[0146] The response information may be the relevant information fed back by the charging system during and after the charging system receives the control instruction and actually executes the instruction, such as whether the charging current is successfully adjusted to the corresponding value as required by the instruction, and how the temperature of the charging cable changes after the current is adjusted. These response information can intuitively reflect the execution effect of the control instruction and can be synchronized with the control instruction to the user, so that the user can fully understand the real-time status of the charging system.

[0147] Smart terminal devices, for example, can refer to devices such as smartphones and tablets used by users that have network connection functions and corresponding applications (APPs). Users can use these smart terminal devices to remotely access the charging system, view charging-related information and perform some necessary operations. They are terminal carriers that receive synchronization information and realize remote monitoring.

[0148] This solution can be based on the pre-establishment of a stable communication link with the smart terminal device, generally using common network communication protocols, such as HTTP or WebSocket protocols, to ensure that data can be efficiently and reliably transmitted between the system and the smart terminal. When a new control instruction is generated or the corresponding response information appears, the information can be integrated and packaged, and packaged according to the pre-defined communication data format to ensure that the information content is complete and meets the format requirements that can be parsed by the application on the smart terminal device. Then the packaged information is pushed to the corresponding smart terminal device through the communication link, and the received data will be parsed and displayed in the application on the smart terminal device, such as presenting the control instruction content and the response information in the form of intuitive text descriptions, charts, etc., so that users can clearly see the control and execution of the system. At the same time, in order to ensure the consistency and timeliness of the data, the synchronization module can also regularly check the data with the smart terminal device. If data loss or inconsistency is found, the corresponding information will be resent in time for synchronization and update, ensuring that the user always sees the latest and most accurate information related to the charging system.

[0149] By setting up a control instruction storage module and a synchronization module, this solution, on the one hand, realizes the effective storage of control instructions, which facilitates the subsequent review, analysis, and troubleshooting of the charging system regulation process, helps to optimize the system control strategy and improve the operation and maintenance management level; on the other hand, the control instructions and response information are synchronized to the user's smart terminal device, so that the user can understand the operating status and regulation of the charging system in real time and comprehensively, which is convenient for the user to detect anomalies in time and make corresponding decisions, greatly improving the user experience of the new energy charging system and the overall intelligent management level.

[0150] Embodiment 3

[0151] Figure 3 1 is a flow chart of a remote control method for a new energy charging cable provided in Embodiment 3 of the present application. Figure 3 As shown, the specific steps include:

[0152] S301, the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable;

[0153] S302, calculating a charging cable power loss according to a power difference between the output power data and the input power data;

[0154] S303, generating temperature status information of the charging cable according to the power loss, and sending the temperature status information to a remote control terminal;

[0155] S304: After receiving the control instruction from the remote control terminal based on the temperature status information feedback, control the charging current of the charging cable.

[0156] Furthermore, before generating the temperature status information of the charging cable according to the power loss, the method further includes:

[0157] When the charging cable is connected normally, establishing a corresponding relationship between power loss and temperature level;

[0158] Accordingly, generating the temperature status information of the charging cable according to the power loss includes:

[0159] The temperature status information of the charging cable is generated according to the power loss and a pre-established correspondence relationship between the power loss and the temperature level.

[0160] In this embodiment, the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable; the power loss of the charging cable is calculated according to the power difference between the output power data and the input power data; the temperature status information of the charging cable is generated according to the power loss, and the temperature status information is sent to the remote control end; after receiving the control instruction based on the temperature status information feedback from the remote control end, the charging current of the charging cable is controlled. Through such a setting, this solution can generate remote control instructions based on the monitored power data through real-time monitoring of the charging power of the charging cable, so as to make reasonable control of the charging of new energy vehicles, improve the safety of the charging process, extend the service life of the charging cable, and improve the charging efficiency while avoiding energy waste.

[0161] The remote control method of the new energy charging cable provided in the embodiment of the present application corresponds to the remote control device of the new energy charging cable provided in the above embodiment, and has the same execution process and beneficial effects. To avoid repetition, it will not be repeated here.

[0162] Embodiment 4

[0163] like Figure 4 As shown, an embodiment of the present application also provides an electronic device 400, including a processor 401, a memory 402, and a program or instruction stored in the memory 402 and executable on the processor 401. When the program or instruction is executed by the processor 401, each process of the remote control device embodiment of the above-mentioned new energy charging cable is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0164] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0165] Embodiment 5

[0166] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned remote control device embodiment of the new energy charging cable are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0167] The processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0168] Embodiment 6

[0169] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned remote control device embodiment of the new energy charging cable, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0170] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0171] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0172] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0173] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0174] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A remote control device for a new energy charging cable, characterized in that: The device comprises: The power data acquisition module acquires the input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable; a power loss calculation module, configured to calculate a charging cable power loss according to a power difference between the output power data and the input power data; a status information sending module, configured to generate a collection instruction for the temperature status information of the charging cable according to the power loss, and send the temperature status information to a remote control terminal; The remote control execution module is used to control the charging current of the charging cable after receiving the control instruction fed back by the remote control terminal based on the temperature status information.

2. The remote control device for the new energy charging cable according to claim 1, characterized in that: The device also includes: a corresponding relationship building module, configured to build a corresponding relationship between power loss and temperature level when the charging cable is in a normal connection; The status information sending module is specifically configured to generate the temperature status information of the charging cable according to the power loss and a pre-established correspondence between the power loss and the temperature level.

3. The remote control device for the new energy charging cable according to claim 1, characterized in that: The device also includes: A real-time current acquisition module, used to acquire the real-time current of the charging cable; A pressure difference calculation module, used to calculate the pressure difference between the charging pile end and the vehicle end of the charging cable according to the real-time current, the input power data and the output power data; a resistance calculation module, configured to calculate a measured resistance of the charging cable according to the voltage difference; The abnormal warning module is used to determine the resistance change according to the difference between the measurement circuit and the theoretical resistance of the charging cable, and to issue an abnormal warning when the resistance change exceeds a preset difference range.

4. The remote control device for the new energy charging cable according to claim 3, characterized in that: The abnormal warning module is specifically used for: Acquire the core parameters of the charging cable; wherein the core parameters include the core material and the wire diameter value; The theoretical resistance of the charging cable is determined according to the core parameters, and a preset difference range of the charging cable is determined.

5. The remote control device for the new energy charging cable according to claim 1, characterized in that: The device also includes: The charging cable fault identification module is used to determine whether the current power loss of the charging cable corresponds to a charging cable fault according to a pre-established correspondence relationship between the power loss and the charging cable fault.

6. The remote control device for the new energy charging cable according to claim 1, characterized in that: The device also includes: The loose contact identification module is used to analyze the input power data and the output power data continuously collected within a preset time period to identify whether the contact position of the charging cable is loose.

7. The remote control device for the new energy charging cable according to claim 1, characterized in that: The device also includes: A control instruction storage module, used for storing the control instructions; The synchronization module is used to synchronize the control instruction and the response information made to the control instruction to the intelligent terminal device used by the user.

8. A remote control method for a new energy charging cable, characterized in that: The method comprises: The input power data collected by the vehicle end and the output power data collected by the charging pile end during the operation of the new energy charging cable; Calculating a charging cable power loss according to a power difference between the output power data and the input power data; generating temperature status information of the charging cable according to the power loss, and sending the temperature status information to a remote control terminal; After receiving the control instruction fed back by the remote control terminal based on the temperature status information, the charging current of the charging cable is controlled.

9. The remote control method of the new energy charging cable according to claim 8, characterized in that: Before generating the temperature status information of the charging cable according to the power loss, the method further includes: When the charging cable is connected normally, establishing a corresponding relationship between power loss and temperature level; Accordingly, generating the temperature status information of the charging cable according to the power loss includes: The temperature status information of the charging cable is generated according to the power loss and a pre-established correspondence relationship between the power loss and the temperature level.

10. An electronic device, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the remote control method for the new energy charging cable as described in any one of claims 8 to 9 are implemented.

Images