Charging pile beforehand early warning method and charging pile beforehand early warning device

Abstract

The invention provides a charging pile beforehand early warning method and device. When the charging pile is in the charging state, at least one charging state value and a temperature rise coefficient value of the charging pile are detected, and the temperature rise coefficient threshold value is obtained based on the at least one charging state value through the pre-established corresponding relation between the at least one charging state value and the temperature rise coefficient threshold value; according to the difference value between the temperature rise coefficient value and the temperature rise coefficient threshold value, the beforehand abnormal change rate is obtained, and then the beforehand early warning level is determined according to the preset beforehand abnormal change rate range where the beforehand abnormal change rate is located. The temperature rise coefficient threshold value can be quickly obtained through the corresponding relation, and the data processing amount is reduced, so that the early warning of the charging pile in advance can be quickly graded, the fire can be timely and effectively stopped in advance, and the charging safety of the charging pile is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of safety warning, and more particularly, to a method, device, medium and electronic device for pre-warning of charging piles. Background Art

[0002] As a kind of high-power electrical appliances, charging piles are usually unattended for a long time when charging electric vehicles. Once a thermal runaway occurs and causes a fire, it often spreads rapidly, which is extremely likely to endanger the property and personal safety of the surrounding people, and the harm is great. In such a scenario, the temperature warning function is particularly important.

[0003] Currently, fire degree warnings are usually carried out by sensing temperature, high voltage, smoke concentration, etc. during charging. However, the warning is only triggered after the accident reaches a certain level, and there are serious problems of warning lag and false alarm, which bring great difficulties to fire extinguishing and can only minimize the losses caused by the fire.

[0004] Therefore, how to effectively perform temperature warning and control before the occurrence of a thermal runaway accident in the charging pile and eliminate the fire hazard at the budding stage is the core requirement to ensure the safety and reliability of the charging pile. The present disclosure provides a method for pre-warning of charging piles to solve one of the above technical problems. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a method, device, medium and electronic device for pre-warning of charging piles, which can solve at least one of the above-mentioned technical problems. The specific solutions are as follows:

[0006] According to a specific embodiment of the present disclosure, in a first aspect, the present disclosure provides a method for pre-warning of charging piles, including:

[0007] When the charging pile is in a charging state, detect at least one charging state value and a temperature rise coefficient value of the charging pile;

[0008] Obtain a temperature rise coefficient threshold based on the at least one charging state value;

[0009] Obtain a pre-abnormal change rate based on the difference between the temperature rise coefficient value and the temperature rise coefficient threshold;

[0010] When the pre-abnormal change rate is within any preset pre-abnormal change rate range, determine a pre-warning level based on the any preset pre-abnormal change rate range.

[0011] Optionally, the obtaining a temperature rise coefficient threshold based on the at least one charging state value includes:

[0012] Obtain a charging current value represented by the charging state value;

[0013] Obtain a temperature rise coefficient threshold based at least on the charging current value.

[0014] Optionally, the obtaining a temperature rise coefficient threshold based at least on the charging current value includes:

[0015] Determine a preset current range in which the charging current value is located;

[0016] Obtain a temperature rise coefficient threshold based at least on the preset current range.

[0017] Optionally, the obtaining a temperature rise coefficient threshold based at least on the preset current range includes:

[0018] Obtain a usage status value of the charging pile represented by the charging status value;

[0019] Obtain a corresponding temperature rise coefficient threshold based on the usage status value and the preset current range.

[0020] Optionally, the obtaining a usage status value of the charging pile represented by the charging status value includes:

[0021] Obtain the cumulative closing times of the relay in the charging pile;

[0022] Determine that the cumulative closing times represent the usage status value of the charging pile.

[0023] Optionally, the obtaining a corresponding temperature rise coefficient threshold based on the usage status value and the preset current range includes:

[0024] Obtain a corresponding temperature rise coefficient group based on the cumulative closing times, where the temperature rise coefficient group at least includes the one-to-one correspondence between the preset current range and the temperature rise coefficient threshold;

[0025] In the obtained temperature rise coefficient group, obtain the temperature rise coefficient threshold based on the preset current range and the one-to-one correspondence.

[0026] Optionally, the obtaining a corresponding temperature rise coefficient group based on the cumulative closing times includes:

[0027] Determine a preset number range in which the cumulative closing times are located;

[0028] Obtain a corresponding temperature rise coefficient group based on the preset number range.

[0029] Optionally, the obtaining a corresponding temperature rise coefficient threshold based on the usage status value and the preset current range includes:

[0030] Obtain a corresponding temperature rise coefficient group based on the preset current range, where at least the one-to-one correspondence between the cumulative closing times and the temperature rise coefficient threshold is included in the temperature rise coefficient group;

[0031] In the obtained temperature rise coefficient group, obtain the temperature rise coefficient threshold based on the cumulative closing times and the one-to-one correspondence.

[0032] Optionally, the obtaining the temperature rise coefficient threshold based on the at least one charging state value includes:

[0033] Obtain the cumulative closing times of the relay in the charging pile represented by the charging state value;

[0034] Determine the preset number range where the cumulative closing times is located;

[0035] Obtain the temperature rise coefficient threshold based on the preset number range.

[0036] Optionally, the temperature rise coefficient threshold includes a maximum temperature rise coefficient threshold.

[0037] According to the specific implementation manners of the present disclosure, in a second aspect, the present disclosure provides a pre-warning device for a charging pile, including:

[0038] A detection unit, configured to detect at least one charging state value and a temperature rise coefficient value of the charging pile when the charging pile is in a charging state;

[0039] A first obtaining unit, configured to obtain a temperature rise coefficient threshold based on the at least one charging state value;

[0040] A second obtaining unit, configured to obtain a pre-abnormal change rate based on the difference between the temperature rise coefficient value and the temperature rise coefficient threshold;

[0041] A warning unit, configured to determine a pre-warning level based on any one of the preset pre-abnormal change rate ranges when the pre-abnormal change rate is within any one of the preset pre-abnormal change rate ranges.

[0042] Optionally, the obtaining the temperature rise coefficient threshold based on the at least one charging state value includes:

[0043] Obtain the charging current value represented by the charging state value;

[0044] Obtain the temperature rise coefficient threshold based on at least the charging current value.

[0045] Optionally, the obtaining the temperature rise coefficient threshold based on at least the charging current value includes:

[0046] Determine the preset current range where the charging current value is located;

[0047] Obtain a temperature rise coefficient threshold based at least on the preset current range.

[0048] Optionally, the obtaining a temperature rise coefficient threshold based at least on the preset current range includes:

[0049] Obtain the usage status value of the charging pile represented by the charging status value;

[0050] Based on the usage status value and the preset current range, obtain a corresponding temperature rise coefficient threshold.

[0051] Optionally, the obtaining the usage status value of the charging pile represented by the charging status value includes:

[0052] Obtain the cumulative closing times of the relay in the charging pile;

[0053] Determine that the cumulative closing times represent the usage status value of the charging pile.

[0054] Optionally, the obtaining a corresponding temperature rise coefficient threshold based on the usage status value and the preset current range includes:

[0055] Based on the cumulative closing times, obtain a corresponding temperature rise coefficient group, where the temperature rise coefficient group at least includes the one-to-one correspondence between the preset current range and the temperature rise coefficient threshold;

[0056] In the obtained temperature rise coefficient group, based on the preset current range and the one-to-one correspondence, obtain the temperature rise coefficient threshold.

[0057] Optionally, the obtaining a corresponding temperature rise coefficient group based on the cumulative closing times includes:

[0058] Determine the preset number range where the cumulative closing times are located;

[0059] Based on the preset number range, obtain a corresponding temperature rise coefficient group.

[0060] Optionally, the obtaining a corresponding temperature rise coefficient threshold based on the usage status value and the preset current range includes:

[0061] Based on the preset current range, obtain a corresponding temperature rise coefficient group, where the temperature rise coefficient group at least includes the one-to-one correspondence between the cumulative closing times and the temperature rise coefficient threshold;

[0062] In the obtained temperature rise coefficient group, based on the cumulative closing times and the one-to-one correspondence, obtain the temperature rise coefficient threshold.

[0063] Optionally, the obtaining a temperature rise coefficient threshold based on the at least one charging status value includes:

[0064] Obtain the cumulative closing times of the relay in the charging pile represented by the charging state value;

[0065] Determine the preset number of times interval where the cumulative closing times is located;

[0066] Obtain the temperature rise coefficient threshold based on the preset number of times interval.

[0067] Optionally, the temperature rise coefficient threshold includes the maximum temperature rise coefficient threshold.

[0068] According to a specific embodiment of the present disclosure, in a third aspect, the present disclosure provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the charging pile pre-warning method described in any one of the above.

[0069] According to a specific embodiment of the present disclosure, in a fourth aspect, the present disclosure provides an electronic device, including: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the charging pile pre-warning method described in any one of the above.

[0070] The above solution of the embodiment of the present disclosure has at least the following beneficial effects compared with the prior art:

[0071] The present disclosure provides a charging pile pre-warning method, device, medium and electronic device. When the charging pile is in a charging state, the present disclosure detects at least one charging state value and temperature rise coefficient value of the charging pile, and based on the pre-established corresponding relationship between the at least one charging state value and the temperature rise coefficient threshold, obtains the temperature rise coefficient threshold based on the at least one charging state value. By the difference between the temperature rise coefficient value and the temperature rise coefficient threshold, the pre-abnormal change rate is obtained, and then the pre-warning level is determined through the preset pre-abnormal change rate range where the pre-abnormal change rate is located. The charging state value uses the physical parameters that the charging pile already needs to collect, and the pre-temperature detection uses an internal temperature probe, so the detection can be completed without additionally increasing the detection circuit, avoiding additional hardware costs in the charging pile. By obtaining the change rate of the internal temperature of the charging pile to determine the warning level, pre-warning can be realized before a thermal runaway accident occurs, avoiding accident risks. Through the corresponding relationship, the temperature rise coefficient threshold can be quickly obtained, reducing the amount of data processing, thereby realizing rapid pre-classification warning of the charging pile, being able to timely and effectively prevent a fire from occurring before the event, and improving the charging safety of the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 Shows a flowchart of the charging pile pre-warning method according to an embodiment of the present disclosure;

[0073] Figure 2 Shows a schematic diagram of the relationship between a preset current range and a temperature rise coefficient threshold according to an embodiment of the present disclosure;

[0074] Figure 3 Shows a schematic diagram of the relationship between a usage status value, a preset current range, and a set of corrected temperature rise coefficients according to an embodiment of the present disclosure;

[0075] Figure 4 Shows a schematic diagram of the relationship between a preset current range and a set of corrected temperature rise coefficients according to an embodiment of the present disclosure;

[0076] Figure 5 Shows a schematic diagram of the relationship between a preset number range and a temperature rise coefficient according to an embodiment of the present disclosure;

[0077] Figure 6 Shows a unit block diagram of a pre-warning device for a charging pile according to an embodiment of the present disclosure;

[0078] Figure 7 Shows a schematic diagram of an electronic device connection structure provided according to an embodiment of the present disclosure. Detailed implementation manners

[0079] In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0080] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms of "a", "the", and "said" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. "Plurality" generally includes at least two.

[0081] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0082] It should be understood that although terms such as first, second, and third may be used in the embodiments of the present disclosure for description, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present disclosure, the first can also be called the second, and similarly, the second can also be called the first.

[0083] Depending on the context, as used herein, the words "if" and "when" may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrases "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0084] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a commodity or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the commodity or device comprising said element.

[0085] It should be particularly noted that symbols and / or numbers present in the specification that are not marked in the accompanying drawings description are not reference numerals.

[0086] The optional embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0087] An embodiment provided by the present disclosure, namely an embodiment of a pre-warning method for a charging pile.

[0088] The following combination Figure 1 The embodiments of the present disclosure will be described in detail.

[0089] Step S101, when the charging pile is in a charging state, detect at least one charging state value and a temperature rise coefficient value of the charging pile.

[0090] Charging pile, is an energy supplement device that provides power for electric vehicles. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. The charging methods of the charging pile include normal charging and fast charging. The charging pile includes: power module, communication module, metering module, safety protection module, etc. Among them, the power module includes rectification unit, inversion unit (AC charging), high-frequency transformer (DC charging), DC / DC converter, DC output unit, power monitoring unit, protection unit, control unit, etc., and can communicate with the charging management service platform. The control unit of the power module of the charging pile is mainly completed by an embedded processor. Users can swipe cards by themselves to perform functions such as user authentication, balance query, and charging fee query, and can also provide a voice output interface to achieve voice interaction. Users can select charging modes according to the instructions of the liquid crystal display screen, including: charging by time, charging by electricity, automatically full charge, charging by mileage, etc. The communication module and the charging management service platform perform data interaction using wired Internet or wireless network. For safety reasons, the electricity charging and amount data are encrypted securely. The charging service management platform mainly has three functions: charging management, charging operation, and comprehensive query. Charging management centrally manages the basic data involved in the system, such as charging pile information, electric vehicle information, and user card information; charging operation mainly performs charging fee management for user charging; comprehensive query refers to comprehensively analyzing and querying the data of management and operation.

[0091] The temperature detection element in the charging pile is an important part to ensure the safety of the charging process, and is involved in the safety protection module, the rectification unit of the power module, the DC output unit, and the protection unit. The current and voltage detection elements are used to ensure the stable and safe current and voltage during the charging process, and are usually used in the safety protection module, the rectification unit of the power module, the DC output unit, the power monitoring unit, and the protection unit. The relay, which is a key component in the charging pile, may be used in the safety protection module, the rectification unit of the power module, and the DC output unit. The relay is an electric switch component that controls the on and off of the charging pile current and protects the circuit.

[0092] The charging status value refers to the electrical parameter value that affects the charging effect during the charging process of the charging pile. The charging status value determines the charging speed, efficiency, and safety of the charging pile. The charging status value includes: charging current value, charging voltage value, charging power value, and / or usage status value. However, the embodiments of the present disclosure are not limited thereto.

[0093] The charging current value refers to the current value controlled by the control unit during the charging of the charging pile.

[0094] The charging voltage value refers to the voltage value controlled by the control unit during the charging of the charging pile.

[0095] The usage status value refers to the usage loss value of the physical performance of the charging device during the charging process of the charging pile. For example, the cumulative number of closures of the relay in the charging pile.

[0096] Detecting at least one charging status value of the charging pile can be understood as randomly detecting at least one charging status value on the time axis, or periodically detecting at least one charging status value, that is, repeatedly detecting the charging status value of the charging pile at intervals of a preset time period. For example, detecting the charging status value of the charging pile once every 1 second.

[0097] The temperature rise coefficient value can be characterized by the ratio of the temperature change value ΔT to the preset time period Δt, that is, K T = ΔT / Δt, or can be characterized by the temperature change value ΔT for a given time period Δt.

[0098] Step S102, obtaining a temperature rise coefficient threshold based on the at least one charging status value.

[0099] Among them, the temperature rise coefficient threshold is used to distinguish whether the temperature rise coefficient value is normal.

[0100] After measurement, there is a one-to-one correspondence between the temperature rise coefficient threshold and the preset charging status value. During the preliminary test, first set a set of charging status value sets {A1, A2, A3,..., An}, measure the influence of each charging status value in the group on the temperature rise coefficient threshold, and obtain the temperature rise coefficient threshold set {Ka1, Ka2, Ka3,..., Kan} corresponding to the charging status value set. Among them, n represents a positive integer greater than 1, the i-th charging status value Ai in the charging status value set corresponds to the i-th temperature rise coefficient threshold Kai in the temperature rise coefficient threshold set, and i represents 1 to n.

[0101] When measuring the temperature rise coefficient value for the same charging status value in the charging status value set, due to the influence of other parameter values of the charging pile and environmental changes, even the original temperature rise coefficient value for the same charging status value is constantly changing. Therefore, multiple original temperature rise coefficient values of the same charging status value can be collected, and then mathematical operations are performed on the multiple original temperature rise coefficient values to obtain the temperature rise coefficient value corresponding to the same charging status value in the temperature rise coefficient value set as the temperature rise coefficient threshold. For example, the temperature rise coefficient threshold is equal to the average value, variance value, covariance, standard deviation (i.e., standard deviation / mean square error), mean square error, root mean square error (i.e., standard error), and root mean square value of multiple original temperature rise coefficient values. However, the present disclosure is not limited thereto.

[0102] In the embodiments of the present disclosure, multiple original temperature rise coefficient values corresponding to the same charging state value are unified into a temperature rise coefficient threshold. Through the charging state value set and the temperature rise coefficient threshold set, a one-to-one correspondence between the charging state value and the temperature rise coefficient threshold is established. By using the detected charging state value, the temperature rise coefficient threshold corresponding to the charging state value can be quickly found through this one-to-one correspondence, reducing the amount of data processing and improving the data processing efficiency for pre-warning of charging piles.

[0103] In some specific embodiments, the temperature rise coefficient threshold includes a maximum temperature rise coefficient threshold.

[0104] The maximum temperature rise coefficient threshold refers to the maximum safe original temperature rise coefficient value detected under the same charging state value during pre-tests.

[0105] In this specific embodiment, a one-to-one correspondence between the charging state value and the maximum temperature rise coefficient threshold is established. Through this one-to-one correspondence, the maximum temperature rise coefficient threshold corresponding to the charging state value can be quickly found. For example, continuing the above example, for the same charging state value Ai, when the temperature rise coefficient threshold obtained by looking up the table is the maximum temperature rise coefficient threshold Kai’, it means that the maximum temperature rise coefficient value among multiple original temperature rise coefficient values is obtained. Obtaining the temperature rise coefficient threshold through the correspondence not only improves the data processing efficiency for pre-warning of charging piles, but also expands the warning range of the temperature rise coefficient through the maximum temperature rise coefficient value, reducing the number of warnings.

[0106] In some specific embodiments, obtaining the temperature rise coefficient threshold based on the at least one charging state value includes the following steps:

[0107] Step S102a-1: Obtain the charging current value characterized by the charging state value.

[0108] Step S102a-2: Obtain the temperature rise coefficient threshold based at least on the charging current value.

[0109] In this specific embodiment, the heat of the charging pile mainly comes from the heat energy generated by the current inside the charging pile. Tests show that there is a correlation between the temperature rise coefficient threshold and the current value. The larger the current value, the greater the energy loss generated inside the charging pile, and the larger the temperature rise coefficient threshold.

[0110] For example, in the set of charging state values {A1, A2, A3, ……, An}, Ai represents the charging current value, which corresponds one-to-one with a temperature rise coefficient threshold Kai in the set of temperature rise coefficient thresholds {Ka1, Ka2, Ka3, ……, Kan}. The charging current value is detected by the current detection circuit, and then the temperature rise coefficient threshold can be obtained by looking up a table based on the charging current value. The charging current is a physical parameter that the charging pile itself will collect, so no additional hardware cost is required to complete the detection. Thus, the charging current value can be collected at a very low hardware cost, achieving the pre-warning of the charging pile.

[0111] In some specific embodiments, obtaining the temperature rise coefficient threshold based at least on the charging current value includes the following steps:

[0112] Step S102a - 21, determining the preset current interval where the charging current value is located.

[0113] Step S102a - 22, obtaining the temperature rise coefficient threshold based at least on the preset current interval.

[0114] For example, as Figure 2 shown, a set of preset current intervals {ΔI1, ΔI2, ΔI3, ……, ΔIn - 1, ΔIn} is obtained through experiments, and a set of temperature rise coefficient thresholds {Ki1, Ki2, Ki3, ……, Kin - 1, Kin} corresponding to the set of preset current intervals is obtained. Among them, n represents a positive integer greater than 1. A preset current interval ΔIj in the set of preset current intervals corresponds one-to-one with a temperature rise coefficient threshold Kij in the temperature rise coefficient group, and j represents 1 to n.

[0115] Through experiments, the change in the safe temperature rise coefficient value within a certain range of the charging current value is not significant. Therefore, in this specific embodiment, multiple charging current values are grouped into one preset current interval, and each preset current interval corresponds to a temperature rise coefficient threshold. That is, a one-to-one correspondence relationship between the preset current interval and the temperature rise coefficient threshold is established. Any charging current value within the preset current interval corresponds to the same temperature rise coefficient threshold. Thus, the amount of data for the one-to-one correspondence relationship required to obtain the temperature rise coefficient threshold is reduced, the amount of data processing is reduced, and the data processing efficiency for the pre-warning of the charging pile is improved.

[0116] In some specific embodiments, the temperature rise coefficient threshold is related not only to the current but also to the usage state value. Therefore, obtaining the temperature rise coefficient threshold based at least on the preset current interval includes the following steps:

[0117] Step S102a - 221, obtaining the usage state value of the charging pile characterized by the charging state value.

[0118] The usage status value refers to the usage loss value of the physical performance of the charging device during the charging process of the charging pile.

[0119] The longer the charging device is used and the more times it is used, the easier it is to age and oxidize, resulting in an increase in the circuit resistance and the temperature rise coefficient.

[0120] In some specific embodiments, obtaining the usage status value of the charging pile represented by the charging status value includes the following steps:

[0121] Step S102a-2211: Obtain the cumulative closing times of the relay in the charging pile.

[0122] Step S102a-2212: Determine that the cumulative closing times represent the usage status value of the charging pile.

[0123] The cumulative closing times refer to the cumulative value of the relay closing times during the charging process of the charging pile. For example, in each charging of the charging pile, the relay closes 10 times in total; after the first charging ends, the cumulative closing times are 10 times; after the second charging ends, the cumulative closing times are 20 times; after the third charging ends, the cumulative closing times are 30 times; and so on. The usage status value can be directly represented by the cumulative closing times.

[0124] In this specific embodiment, the usage status value of the charging pile is represented by the cumulative closing times of the relay. When the cumulative closing times of the relay are used to represent the usage status value of the charging pile, the larger the cumulative closing times of the relay, the easier it is for the charging pile to age and oxidize, resulting in an increase in the resistance in the charging pile circuit and the temperature rise coefficient threshold.

[0125] In this specific embodiment, no additional circuit for detecting the charging status value of the charging device is added to the charging pile. Instead, the cumulative closing times of the relay of the charging pile are used to represent the usage status value of the charging pile. The cumulative closing times of the relay of the charging pile are statistically recorded and saved. Before each charging, the saved cumulative closing times of the relay are obtained, and thus the charging status value of the charging pile is obtained, thereby reducing the hardware usage cost.

[0126] Step S102a-222: Obtain the corresponding temperature rise coefficient threshold based on the usage status value and the preset current range.

[0127] It can be understood that there is a corresponding relationship between the usage status value and the preset current range and the temperature rise coefficient threshold, and this corresponding relationship is obtained through experiments.

[0128] For example, as Figure 3As shown, the i-th usage state value is represented by Ai in the set of usage state values {A1, A2, A3, …… Am-1, Am}, and the j-th preset current interval is represented by ΔIj in the set of current intervals {ΔI1, ΔI2, ΔI3, ……, ΔIn-1, ΔIn}. The two act together on the k-th temperature rise coefficient threshold Kaik in the set of temperature rise coefficient thresholds {Kai11, ……, Kai1m, Kai21, ……, Kai2m, Kai31, ……, Kai3m, ……, Kai(n-1)1, ……, Kai(n-1)m, Kain1……Kainm}, corresponding one by one. After obtaining Ai, according to the preset current interval Ij where the detected current value is located, the temperature rise coefficient threshold Kaik can be obtained by using the method of looking up a table.

[0129] Preferably, the temperature rise coefficient threshold Kaik at this time is the sum of two temperature rise coefficient thresholds. The first is the temperature rise coefficient threshold Kai related to the usage state value, and the second is the temperature rise coefficient threshold Kij related to the preset current interval. The ratio is obtained by dividing the predicted temperature change value ΔT by the time Δt for the corresponding usage state value A and current I respectively and then taking the sum, that is, Kaik = ΔTai / Δt + ΔTij / Δt. Optionally, the temperature rise coefficient threshold related to the usage state can be the temperature rise coefficient thresholds under different usage states measured by the same type of charging pile under the same current conditions. That is, in the same current interval ΔIj, there are m temperature coefficient thresholds corresponding to the usage state values A1 - Am. There are n current intervals ΔI in total, so there are m×n temperature rise coefficient thresholds in total. At this time, it is necessary to first measure the temperature rise coefficient threshold Kai = ΔTij / Δt of the unused charging pile in the current interval ΔIj, and then calculate the floating increase ΔTai of the temperature of the charging pile under different usage states in this current interval above ΔTij, and then calculate the temperature rise coefficient threshold Kaik = ΔTai / Δt + ΔTij / Δt. Similarly, the temperature rise coefficient threshold can also be the temperature rise coefficient thresholds under different current conditions measured by the same type of charging pile under the same usage state, and m×n temperature rise coefficient thresholds are also obtained.

[0130] In this specific embodiment, determining the temperature rise coefficient threshold by the usage state value and the preset current interval increases the influence of the usage state value on the temperature rise coefficient threshold, and further improves the accuracy of obtaining the temperature rise coefficient threshold.

[0131] In some specific embodiments, obtaining the corresponding temperature rise coefficient threshold based on the usage state value and the preset current interval includes the following steps:

[0132] Step S102a-222a-1, obtaining the corresponding temperature rise coefficient group based on the usage state value.

[0133] The usage state value can be directly characterized by the cumulative closing times. There is a corresponding relationship between the cumulative closing times and the temperature rise coefficient group. This corresponding relationship can be that multiple cumulative closing time values correspond to one temperature rise coefficient group, that is, a many-to-one corresponding relationship, or a one-to-one corresponding relationship. For example, in the case of a one-to-one corresponding relationship, the set of cumulative closing times {C1, C2, C3, ……, Cm-1, Cm}, and the data set of temperature rise coefficient groups {Mc1, Mc2, Mc3, ……, Mc(m-1), Mcm}. If the cumulative closing time is Ci, the temperature rise coefficient group Mci is obtained by looking up the data set of temperature rise coefficient groups, where i is a positive integer greater than 1. Among them, at least the one-to-one corresponding relationship between the preset current interval and the temperature rise coefficient threshold is included in the temperature rise coefficient group. n preset current intervals ΔI correspond to n temperature rise coefficient thresholds {Ki1, Ki2, Ki3, ……, Ki(n-1), Kin}.

[0134] In some other specific embodiments, obtaining the corresponding temperature rise coefficient group based on the usage state value includes the following steps:

[0135] Step S102a-222a-11, determining the preset number interval where the usage state value is located.

[0136] Step S102a-222a-12, obtaining the corresponding temperature rise coefficient group based on the preset number interval.

[0137] For example, as Figure 4 shown, the set of preset number intervals {ΔC1, ΔC2, ΔC3, ……, ΔCm-1, ΔCm} is obtained through experiments, and the data set of temperature rise coefficient groups {Mc1, Mc2, Mc3, ……, Mcm-1, Mcm} corresponding to the set of preset number intervals is obtained. Among them, m represents a positive integer greater than 1. One preset number interval ΔCi in the set of preset number intervals corresponds to the temperature rise coefficient group Mci in the data set of temperature rise coefficient groups one by one, and i represents 1 to m. If the cumulative closing time is C, determine the preset number interval ΔCi where C is located, and obtain the corresponding temperature rise coefficient group Mci by looking up the table through ΔCi.

[0138] Step S102a-222a-2, in the obtained temperature rise coefficient group, obtaining the temperature rise coefficient threshold based on the preset current interval and the one-to-one corresponding relationship.

[0139] At least the one-to-one corresponding relationship between the preset current interval and the temperature rise coefficient threshold is included in the temperature rise coefficient group Mci. The obtained preset current interval is ΔIj, where j is a positive integer greater than 1. Look up the temperature rise coefficient group Mcij through the preset current interval ΔIj to obtain the temperature rise coefficient threshold Kcij.

[0140] Therefore, the temperature change rate value is determined according to the cumulative closing times of the relay in the charging pile and the preset current range. Through the mapping relationship between data, the data processing process is simplified, and the sensitivity and accuracy of early warning are improved.

[0141] In this specific embodiment, multiple cumulative closing times are grouped into a preset number range, and each preset number range corresponds to a temperature rise coefficient group, that is, a one-to-one correspondence between the preset number range and the temperature rise coefficient group is established. All cumulative closing times within the preset number range correspond to the same temperature rise coefficient group, realizing a many-to-one correspondence between the cumulative closing times and the temperature rise coefficient group, thereby reducing the amount of data in the one-to-one correspondence in the temperature rise coefficient group. It not only improves the sensitivity and accuracy of early warning, but also greatly reduces the amount of data processing through multiple mapping relationships, improving the data processing efficiency of the early warning of the charging pile in advance.

[0142] In another specific embodiment, obtaining the corresponding temperature rise coefficient threshold based on the usage state value and the preset current range includes:

[0143] Step S102a-222b-1, obtaining the corresponding temperature rise coefficient group based on the preset current range.

[0144] There is a corresponding relationship between the preset current range and the temperature rise coefficient group. This corresponding relationship can be that multiple preset current ranges correspond to one temperature rise coefficient group, that is, a many-to-one corresponding relationship, or a one-to-one corresponding relationship. For example, in the case of a one-to-one corresponding relationship, the preset current range {ΔI1, ΔI2, ΔI3, ……, ΔIm-1, ΔIm}, the temperature rise coefficient group data set {Mc1, Mc2, Mc3, ……, Mc(m-1), Mcm}, if the preset current range is ΔIi, the temperature rise coefficient group Mci is obtained by looking up the temperature rise coefficient group data set. Among them, i is a positive integer greater than 1. Among them, at least a one-to-one corresponding relationship between the cumulative closing times and the temperature rise coefficient threshold is included in the temperature rise coefficient group. n cumulative closing time sets {C1, C2, C3, ……, Cn-1, Cn} correspond to n temperature rise coefficient thresholds {Ki1, Ki2, Ki3, ……, Ki(n-1), Kin}.

[0145] Step S102a-222b-2, in the obtained temperature rise coefficient group, obtaining the temperature rise coefficient threshold based on the cumulative closing times and the one-to-one corresponding relationship.

[0146] At least a one-to-one corresponding relationship between the cumulative closing times and the temperature rise coefficient threshold is included in the temperature rise coefficient group Mci. The obtained cumulative closing time is Cj, where j is a positive integer greater than 1. The temperature rise coefficient threshold Kcij is obtained by looking up the temperature rise coefficient group Mcij with the cumulative closing time Cj.

[0147] Therefore, the temperature change rate value is determined according to the cumulative closing times of the relay in the charging pile and the preset current range. Through the mapping relationship between the data, the data processing process is simplified, and the sensitivity and accuracy of the early warning are improved.

[0148] In this specific embodiment, multiple current values are grouped into a preset current range, and each preset current range corresponds to a temperature rise coefficient group, that is, a one-to-one correspondence between the preset current range and the temperature rise coefficient group is established. All current values within the preset current range correspond to the same temperature rise coefficient group, realizing a many-to-one correspondence between the current value and the temperature rise coefficient group, thereby reducing the amount of data in the one-to-one correspondence in the temperature rise coefficient group. It not only improves the sensitivity and accuracy of the early warning, but also greatly reduces the amount of data processing through the multiple mapping relationships, improving the data processing efficiency of the pre-warning of the charging pile.

[0149] In another specific embodiment, obtaining the temperature rise coefficient threshold based on the at least one charging state value includes the following steps:

[0150] Step S102b-1, obtaining the cumulative closing times of the relay in the charging pile characterized by the charging state value.

[0151] Step S102b-2, determining the preset number range where the cumulative closing times are located.

[0152] Step S102b-3, obtaining the temperature rise coefficient threshold based on the preset number range.

[0153] In this specific embodiment, as Figure 5 shown, the cumulative closing times of the relay in the charging pile characterize the charging state value. Multiple cumulative closing times are grouped into a preset number range, and each preset number range corresponds to a temperature rise coefficient threshold, that is, a one-to-one correspondence between the preset number range and the temperature rise coefficient threshold is established. For example, through experiments, a preset number range set {ΔC1, ΔC2, ΔC3, ……, ΔCm-1, ΔCm} is obtained, and a temperature rise coefficient threshold set {Kc1, Kc2, Kc3, ……, Kcm-1, Kcm} corresponding to the preset number range set is obtained, where m represents a positive integer greater than 1. The i-th preset number range ΔCi in the preset number range set corresponds one-to-one to the i-th temperature rise coefficient threshold Kci in the temperature rise coefficient threshold set, and i represents 1 to n.

[0154] All cumulative closing times within the preset number range correspond to the same temperature rise coefficient threshold, realizing a one-to-one correspondence between the cumulative closing times range and the temperature rise coefficient threshold. It not only improves the sensitivity and accuracy of the early warning, but also reduces the amount of data processing through the mapping relationship, improving the data processing efficiency of the pre-warning of the charging pile.

[0155] Step S103: Obtain the pre - anomaly change rate based on the difference between the temperature rise coefficient value and the temperature rise coefficient threshold.

[0156] When the temperature rise coefficient value is greater than the temperature rise coefficient threshold, the pre - anomaly change rate is positive; when the temperature rise coefficient value is less than or equal to the temperature rise coefficient threshold, the pre - anomaly change rate is negative or zero.

[0157] Step S104: When the pre - anomaly change rate is within any preset pre - anomaly change rate range, determine the pre - warning level based on the any preset pre - anomaly change rate range.

[0158] The preset pre - anomaly change rate range refers to the pre - warning range of the pre - anomaly change rate before the charging pile catches fire, which is set in advance.

[0159] When the pre - anomaly change rate is positive, it indicates that the temperature rise coefficient value exceeds the temperature rise coefficient threshold, which means that the temperature rise coefficient value is in a non - safe state.

[0160] In the embodiments of the present disclosure, multiple preset pre - anomaly change rate ranges are divided according to the pre - warning levels. When the pre - anomaly change rate is within any preset pre - anomaly change rate range among the multiple preset pre - anomaly change rate ranges, the pre - warning level corresponding to the any preset pre - anomaly change rate range is determined as the current pre - warning level. For example, a preset first pre - anomaly change rate range, a preset second pre - anomaly change rate range, and a preset third pre - anomaly change rate range respectively correspond to a first - level pre - warning level, a second - level pre - warning level, and a third - level pre - warning level; if the pre - anomaly change rate is within the preset second pre - anomaly change rate range, the second - level pre - warning level is determined.

[0161] In the embodiment of the present disclosure, when the charging pile is in the charging state, at least one charging state value and a temperature rise coefficient value of the charging pile are detected, and the temperature rise coefficient threshold value is obtained based on the at least one charging state value through the pre-established correspondence relationship between the at least one charging state value and the temperature rise coefficient threshold value, and the prior abnormal change rate is obtained through the difference between the temperature rise coefficient value and the temperature rise coefficient threshold value, and then the pre-warning level is determined through the preset pre-abnormal change rate range in which the pre-abnormal change rate is located. The charging state value uses the physical parameters that the charging pile is supposed to collect, and the pre-temperature detection uses the internal temperature probe, so the detection can be completed without adding an additional detection circuit, avoiding the increase of additional hardware costs in the charging pile. By obtaining the change rate of the internal temperature of the charging pile to determine the warning level, it is possible to achieve a warning before a thermal runaway accident occurs, avoiding the risk of an accident. The temperature rise coefficient threshold value can be quickly obtained through the corresponding relationship, reducing the amount of data processing, thereby achieving a quick and graded warning of the charging pile in advance, and being able to timely and effectively prevent the occurrence of a fire in advance, thereby improving the safety of charging of the charging pile.

[0162] The present disclosure also provides an apparatus embodiment that is consistent with the above-mentioned embodiment, and is used to implement the method steps described in the above-mentioned embodiment. The explanation based on the same name meaning is the same as that of the above-mentioned embodiment, and has the same technical effect as that of the above-mentioned embodiment, and will not be repeated here.

[0163] like Figure 6 As shown, the present disclosure provides a charging pile advance warning device 600, comprising:

[0164] The detection unit 601 is used to detect at least one charging state value of the charging pile when the charging pile is in a charging state;

[0165] A first obtaining unit 602, configured to obtain a temperature rise coefficient value based on the at least one charging state value;

[0166] The temperature rise coefficient value can be represented by the ratio of the temperature change value ΔT to the preset time length Δt, that is, K T =ΔT / Δt, which can also be expressed as the temperature change value ΔT for a given time Δt;

[0167] A second obtaining unit 603 is used to obtain a prior abnormal change rate based on a difference between the temperature rise coefficient value and the temperature rise coefficient threshold;

[0168] The warning unit 604 is used to determine a pre-warning level based on any preset pre-abnormal change rate range when the pre-abnormal change rate is within any preset pre-abnormal change rate range.

[0169] Optionally, obtaining a temperature rise coefficient threshold value based on the at least one charging state value includes:

[0170] Obtain the charging current value represented by the charging status value;

[0171] Obtain a temperature rise coefficient threshold based at least on the charging current value.

[0172] Optionally, the obtaining a temperature rise coefficient threshold based at least on the charging current value includes:

[0173] Determine a preset current interval where the charging current value is located;

[0174] Obtain a temperature rise coefficient threshold based at least on the preset current interval.

[0175] Optionally, the obtaining a temperature rise coefficient threshold based at least on the preset current interval includes:

[0176] Obtain the usage status value of the charging pile represented by the charging status value;

[0177] Obtain a corresponding temperature rise coefficient threshold based on the usage status value and the preset current interval.

[0178] Optionally, the obtaining the usage status value of the charging pile represented by the charging status value includes:

[0179] Obtain the cumulative closing times of the relay in the charging pile;

[0180] Determine that the cumulative closing times represents the usage status value of the charging pile.

[0181] Optionally, the obtaining a corresponding temperature rise coefficient threshold based on the usage status value and the preset current interval includes:

[0182] Obtain a corresponding temperature rise coefficient group based on the cumulative closing times, where the temperature rise coefficient group at least includes the one-to-one correspondence between the preset current interval and the temperature rise coefficient threshold;

[0183] In the obtained temperature rise coefficient group, obtain the temperature rise coefficient threshold based on the preset current interval and the one-to-one correspondence.

[0184] Optionally, the obtaining a corresponding temperature rise coefficient group based on the cumulative closing times includes:

[0185] Determine a preset number interval where the cumulative closing times is located;

[0186] Obtain a corresponding temperature rise coefficient group based on the preset number interval.

[0187] Optionally, the obtaining a corresponding temperature rise coefficient threshold based on the usage status value and the preset current interval includes:

[0188] Obtain a corresponding temperature rise coefficient group based on the preset current range, where at least the one-to-one correspondence between the cumulative closing times and the temperature rise coefficient threshold is included in the temperature rise coefficient group;

[0189] In the obtained temperature rise coefficient group, obtain the temperature rise coefficient threshold based on the cumulative closing times and the one-to-one correspondence.

[0190] Optionally, the obtaining the temperature rise coefficient threshold based on the at least one charging state value includes:

[0191] Obtain the cumulative closing times of the relay in the charging pile represented by the charging state value;

[0192] Determine the preset number range where the cumulative closing times is located;

[0193] Obtain the temperature rise coefficient threshold based on the preset number range.

[0194] Optionally, the temperature rise coefficient threshold includes a maximum temperature rise coefficient threshold.

[0195] In the embodiment of the present disclosure, when the charging pile is in the charging state, at least one charging state value and a temperature rise coefficient value of the charging pile are detected. Based on the established corresponding relationship between the at least one charging state value and the temperature rise coefficient threshold, the temperature rise coefficient threshold is obtained based on the at least one charging state value. The pre-anomaly change rate is obtained through the difference between the temperature rise coefficient value and the temperature rise coefficient threshold, and then the pre-warning level is determined through the preset pre-anomaly change rate range where the pre-anomaly change rate is located. The charging state value uses the physical parameters that the charging pile already needs to collect, and the pre-temperature detection uses an internal temperature probe, so the detection can be completed without adding an additional detection circuit, avoiding the additional hardware cost in the charging pile. By obtaining the change rate of the internal temperature of the charging pile to determine the warning level, early warning can be realized before the thermal runaway accident occurs, avoiding the accident risk. The temperature rise coefficient threshold can be quickly obtained through the corresponding relationship, reducing the data processing volume, thereby realizing the pre-rapid grading warning of the charging pile, being able to timely and effectively prevent the occurrence of fire before, and improving the charging safety of the charging pile.

[0196] As Figure 7 shown, this embodiment provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method steps as described in the above embodiment.

[0197] Embodiments of the present disclosure provide a non-volatile computer storage medium storing computer-executable instructions that can execute the method steps described in the above embodiments.

[0198] Reference is made below Figure 7 to, which shows a schematic structural diagram of an electronic device suitable for implementing embodiments of the present disclosure. The terminal devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), in-vehicle terminals (such as in-vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 7 The electronic device shown is merely an example and should not impose any limitation on the functions and usage scope of the embodiments of the present disclosure.

[0199] As Figure 7 shown, the electronic device may include a processing device (such as a central processing unit, a graphics processing unit, etc.) 701, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage device 708 into a random access memory (RAM) 703. In the RAM 703, various programs and data required for the operation of the electronic device are also stored. The processing device 701, the ROM 702, and the RAM 703 are connected to each other through a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0200] Generally, the following devices may be connected to the I / O interface 705: an input device 706 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 705 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 708 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 709. The communication device 709 can allow the electronic device to communicate with other devices wirelessly or wiredly to exchange data. Although Figure 7 shows an electronic device having various devices, it should be understood that it is not required to implement or have all the shown devices. More or fewer devices may be implemented or had alternatively.

[0201] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program includes program code for performing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device 709, or installed from a storage device 708, or installed from a ROM 702. When the computer program is executed by a processing device 701, the above-described functions defined in the methods of the embodiments of the present disclosure are performed.

[0202] It should be noted that the above-mentioned computer-readable medium in the present disclosure can be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of a computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present disclosure, a computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, in which computer-readable program code is carried. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, and the computer-readable signal medium can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0203] The above-mentioned computer-readable medium can be included in the above-mentioned electronic device; or it can exist separately and not be assembled into the electronic device.

[0204] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0205] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0206] The units described in the embodiments of the present disclosure may be implemented in software or in hardware. Among them, the name of the unit does not constitute a limitation on the unit itself in some cases.

[0207] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts among the various embodiments may be referred to each other. For the systems or devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts may be referred to the description of the method part.

[0208] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A charging pile advance warning method, characterized in that: include: When the charging pile is in a charging state, detecting at least one charging state value and a temperature rise coefficient value of the charging pile; Obtaining a temperature rise coefficient threshold value based on the at least one state of charge value; Based on the difference between the temperature rise coefficient value and the temperature rise coefficient threshold, obtaining a prior abnormal change rate; When the prior abnormal change rate is within any preset prior abnormal change rate range, a prior warning level is determined based on any preset prior abnormal change rate range.

2. The method according to claim 1, characterized in that The obtaining of a temperature rise coefficient threshold value based on the at least one charging state value comprises: Obtaining a charging current value represented by the charging state value; A temperature rise coefficient threshold is obtained based at least on the charging current value.

3. The method according to claim 2, characterized in that The obtaining of a temperature rise coefficient threshold value based at least on the charging current value comprises: Determine a preset current interval within which the charging current value lies; A temperature rise coefficient threshold is obtained based at least on the preset current interval.

4. The method according to claim 3, characterized in that The obtaining of the temperature rise coefficient threshold value based at least on the preset current interval includes: Obtaining a usage status value of the charging pile represented by the charging status value; A corresponding temperature rise coefficient threshold is obtained based on the usage status value and the preset current interval.

5. The method according to claim 4, characterized in that The obtaining the usage status value of the charging pile represented by the charging status value includes: Obtaining the cumulative closing times of the relay in the charging pile; Determining the accumulated closing times represents a usage status value of the charging pile.

6. The method according to claim 5, characterized in that The obtaining a corresponding temperature rise coefficient threshold value based on the usage status value and the preset current interval includes: Obtaining a corresponding temperature rise coefficient group based on the accumulated number of closing times, wherein the temperature rise coefficient group includes at least a one-to-one correspondence between the preset current interval and the temperature rise coefficient threshold; In the obtained temperature rise coefficient group, the temperature rise coefficient threshold is obtained based on the preset current interval and the one-to-one correspondence.

7. The method according to claim 6, characterized in that The obtaining of a corresponding temperature rise coefficient group based on the cumulative number of closures comprises: Determine the preset number interval within which the cumulative number of closing times falls; A corresponding temperature rise coefficient group is obtained based on the preset number interval.

8. The method according to claim 5, characterized in that The obtaining a corresponding temperature rise coefficient threshold value based on the usage status value and the preset current interval includes: Obtaining a corresponding temperature rise coefficient group based on the preset current interval, wherein the temperature rise coefficient group includes at least a one-to-one correspondence between the cumulative number of closing times and the temperature rise coefficient threshold; In the obtained temperature rise coefficient group, the temperature rise coefficient threshold is obtained based on the cumulative number of closing times and the one-to-one correspondence.

9. The method according to claim 1, characterized in that: The obtaining of a temperature rise coefficient threshold value based on the at least one charging state value comprises: Obtaining the cumulative closing times of the relay in the charging pile represented by the charging state value; Determine the preset number interval within which the cumulative number of closing times falls; A temperature rise coefficient threshold is obtained based on the preset number interval.

10. The method according to claim 1, characterized in that The temperature rise coefficient threshold includes a maximum temperature rise coefficient threshold.

11. A charging pile advance warning device, characterized in that: include: A detection unit, used to detect at least one charging state value and a temperature rise coefficient value of the charging pile when the charging pile is in a charging state; A first obtaining unit, configured to obtain a temperature rise coefficient threshold value based on the at least one charging state value; A second obtaining unit, configured to obtain a prior abnormal change rate based on a difference between the temperature rise coefficient value and the temperature rise coefficient threshold; The early warning unit is used to determine the early warning level based on any preset early warning rate range when the early warning rate is within any preset early warning rate range.

Images