Charging control method and device, storage medium and electronic equipment

Abstract

The invention provides a charging control method and device, a storage medium and electronic equipment, and the method comprises the steps: obtaining a current required current value of a vehicle under the condition that a charging gun is connected to the vehicle; under the condition that the required current value is larger than the rated current value of the charging gun, the target output current value of the charging gun is determined, and the target output current value is the smaller one of the required current value and the current output upper limit value of the charging gun; determining the safe fast charging duration of the charging gun according to the current temperature of the charging gun and the target output current value; and controlling the charging gun to output electric energy to the vehicle according to the target output current value and the safe fast charging duration. According to the invention, the requirement that the electric vehicle is charged by using large current can be met.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and more specifically, to a charging control method, device, storage medium and electronic device. Background Art

[0002] With the rapid development of the electric vehicle industry, the construction and upgrading of charging infrastructure has become one of the key factors in promoting the popularization of electric vehicles. As the main charging equipment for electric vehicles, the performance and compatibility of charging piles are directly related to the charging efficiency and user experience of electric vehicles.

[0003] At present, the charging current design of charging piles is mainly based on the rated current of the charging gun, which means that the maximum charging current of a single gun of this type of charging pile is limited to the rated current.

[0004] As electric vehicle technology continues to advance, battery capacity is gradually increasing, and the requirements for charging speed are also increasing. While pursuing fast charging, the battery management system (BMS) of electric vehicles is also being optimized to ensure safety and efficiency during the charging process. This optimization may result in the battery needing to receive a current value higher than that provided by traditional charging piles in certain charging stages, while the rated current of existing charging guns is generally low and cannot meet the charging needs of electric vehicles for large charging currents. Summary of the invention

[0005] In view of this, the present application provides a charging control method, device, storage medium and electronic device, which can meet the charging requirements of electric vehicles using high current charging. The specific scheme is as follows:

[0006] A charging control method, comprising:

[0007] When the charging gun is connected to the vehicle, the current demand current value of the vehicle is obtained;

[0008] When the required current value is greater than the rated current value of the charging gun, determining a target output current value of the charging gun, the target output current value being the smaller of the required current value and an upper limit value of the current output of the charging gun;

[0009] Determining a safe fast charging time of the charging gun according to the current temperature of the charging gun and the target output current value;

[0010] The charging gun is controlled to output electrical energy to the vehicle according to the target output current value and the safe fast charging duration.

[0011] In the above method, optionally, determining the safe fast charging time of the charging gun according to the current temperature of the charging gun and the target output current value includes:

[0012] The preset data table is queried according to the current temperature of the charging gun and the target output current value to obtain the safe fast charging time of the charging gun; the safe fast charging time is the maximum allowed time when the charging gun outputs electrical energy at the target output current value at the current temperature.

[0013] The above method may optionally include controlling the charging gun to output electrical energy to the vehicle according to the target output current value and the safe fast charging duration, including:

[0014] Controlling the charging gun to output electric energy to the vehicle according to the target output current value until a preset condition is met;

[0015] The preset condition includes any one of the following:

[0016] The duration for the charging gun to output electric energy according to the target output current value reaches the safe fast charging duration;

[0017] Alternatively, the demand current value of the vehicle changes;

[0018] Alternatively, the upper limit value of the current output of the charging gun changes;

[0019] Alternatively, the temperature of the charging gun reaches a derating temperature threshold.

[0020] The above method, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, further comprises:

[0021] If the duration for which the charging gun outputs electric energy at the target output current value reaches the safe fast charging duration, the charging gun is controlled according to the rated current value to output electric energy to the vehicle.

[0022] The above method, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, further comprises:

[0023] If the required current value of the vehicle changes, determining whether the changed required current value is greater than the rated current value of the charging gun;

[0024] When the changed demand current value is greater than the rated current value of the charging gun, returning to the step of determining the target output current value of the charging gun;

[0025] When the changed demand current value is not greater than the rated current value of the charging gun, the charging gun is controlled to output electric energy to the vehicle according to the changed demand current value.

[0026] The above method, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, further comprises:

[0027] If the temperature of the charging gun reaches the derating temperature threshold, the charging gun is controlled to output electric energy at a first output current value; the first output current value is not greater than the rated current value.

[0028] The above method may, optionally, after controlling the charging gun to output electric energy at the first output current value, further comprises:

[0029] If the temperature of the charging gun is lower than the safety threshold, the process returns to the step of obtaining the required current value of the vehicle.

[0030] The above method may, optionally, after controlling the charging gun to output electric energy at the first output current value, further comprises:

[0031] If the temperature of the charging gun reaches a fault-stop charging threshold, the charging gun is controlled to stop outputting electric energy; the fault-stop charging threshold is greater than the derating temperature threshold.

[0032] A charging control device, comprising:

[0033] An acquisition unit, used to acquire a current demand current value of the vehicle when the charging gun is connected to the vehicle;

[0034] a first determining unit, configured to determine a target output current value of the charging gun when the required current value is greater than a rated current value of the charging gun, the target output current value being the smaller of the required current value and an upper limit value of a current output of the charging gun;

[0035] A second determining unit, configured to determine a safe fast charging duration of the charging gun according to a current temperature of the charging gun and the target output current value;

[0036] A control unit is used to control the charging gun to output electrical energy to the vehicle according to the target output current value and the safe fast charging duration.

[0037] A storage medium includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the charging control method as described above.

[0038] An electronic device includes a memory and one or more instructions, wherein the one or more instructions are stored in the memory and are configured to be executed by one or more processors to perform the charging control method as described above.

[0039] Compared with the prior art, this application has the following beneficial effects:

[0040] The present application provides a charging control method, device, storage medium and electronic device, the method comprising: obtaining the current demand current value of the vehicle when the charging gun is connected to the vehicle; determining the target output current value of the charging gun when the demand current value is greater than the rated current value of the charging gun, the target output current value being the smaller of the demand current value and the current output upper limit value of the charging gun; determining the safe fast charging duration of the charging gun according to the current temperature of the charging gun and the target output current value; and controlling the charging gun to output electrical energy to the vehicle according to the target output current value and the safe fast charging duration. By applying the method provided in the embodiment of the present application, the vehicle can be charged with a current higher than the rated current value when the demand current value of the vehicle is greater than the rated current value of the charging gun, thereby meeting the vehicle's demand for high current charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0042] Figure 1 A method flow chart of a charging control method provided in an embodiment of the present application;

[0043] Figure 2 An example diagram of a vehicle charging curve provided in an embodiment of the present application;

[0044] Figure 3 Another example diagram of a vehicle charging curve provided in an embodiment of the present application;

[0045] Figure 4 Another example diagram of a vehicle charging curve provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the structure of a charging control device provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] At present, the charging current design of charging piles is mainly based on the rated current of the charging gun. This means that the maximum charging current of a single gun of this type of charging pile is limited to the rated current. With the continuous advancement of electric vehicle technology, battery capacity has gradually increased, and the requirements for charging speed have also increased. While pursuing fast charging, the battery management system (BMS) of electric vehicles is also being continuously optimized to ensure safety and efficiency during the charging process. This optimization may result in the battery needing to receive a current value higher than that provided by traditional charging piles in certain charging stages, while the rated current of existing charging guns is generally low and cannot meet the charging needs of electric vehicles using high current charging.

[0050] Based on this, in one embodiment provided in the present application, when the charging gun is connected to the vehicle, the electronic device obtains the current demand current value of the vehicle; when the demand current value is greater than the rated current value of the charging gun, the target output current value of the charging gun is determined, and the target output current value is the smaller of the demand current value and the current output upper limit value of the charging gun; the safe fast charging time of the charging gun is determined according to the current temperature of the charging gun and the target output current value; and the charging gun is controlled to output electric energy to the vehicle according to the target output current value and the safe fast charging time. It is possible to output excess current to the vehicle while ensuring charging safety, thereby effectively increasing the charging speed and meeting the vehicle's demand for high current charging.

[0051] The present application also provides a charging control method, which can be applied to an electronic device, which can be a charging pile or a control device of a charging pile, etc. The flowchart of the method is as follows: Figure 1 As shown, specifically including:

[0052] S101: Detect whether the charging gun is connected to the vehicle; if so, execute S102; if not, return to execute S101 again.

[0053] In this embodiment, whether the charging gun is connected to the vehicle can be detected through electrical connection detection, communication connection detection or physical switch.

[0054] Optionally, the charging gun may be an air-cooled charging gun. In some embodiments, the charging gun may also be a liquid-cooled charging gun.

[0055] S102: Obtain the current demand value of the vehicle.

[0056] Optionally, a charging demand signal sent by a vehicle may be received, and a demand current value may be obtained from signal information of the charging demand signal.

[0057] In this embodiment, the current demand values ​​of the vehicle in different charging stages may be different, and the current demand value of the vehicle may be determined based on the battery charging characteristics of the vehicle and the control strategy of the vehicle battery management system.

[0058] S103: Detect whether the current demand value of the vehicle is greater than the rated current value of the charging gun. If not, execute S104; if so, execute S105.

[0059] S104: Controlling the charging gun to output electric energy to the vehicle according to the current current value required by the vehicle.

[0060] In this embodiment, when the required current value is not greater than the rated current value of the charging gun, the charging gun is controlled to output electric energy to the vehicle according to the required current value.

[0061] S105: Determine the target output current value of the charging gun. In this embodiment, when the required current value and the upper limit value of the current output of the charging gun are not equal, the target output current value is the smaller of the required current value and the upper limit value of the current output of the charging gun; when the required current value and the upper limit value of the current output of the charging gun are equal, the target output current value can be one of the required current value and the upper limit value of the current output.

[0062] In this embodiment, the current output upper limit value may be the maximum current output capacity of the charging device to which the charging gun belongs, and the current output upper limit value may be determined based on the charging power allocated to the charging device. The rated current value is the standard output current designed for the charging gun under the expected working conditions, and is a recommended value set based on the safety and performance of the charging gun and its connecting cables, plugs and other components. The current output upper limit value and the rated current value are two different parameters of the charging gun. In some embodiments, the current output upper limit value is not less than the rated current value.

[0063] S106: Determine the safe fast charging time of the charging gun according to the current temperature of the charging gun and the target output current value.

[0064] In this embodiment, the safe fast charging duration may be a predicted duration for the charging gun to heat up from the current temperature to a preset upper temperature limit when the charging gun outputs electrical energy at the target output current value.

[0065] Optionally, the current temperature of the charging gun may be the temperature of a tip of the charging gun.

[0066] Optionally, the safe fast charging duration can be obtained based on historical test parameters of a target charging gun, which has the same model as the target charging gun, and the historical test parameters are the same as the current temperature and target output current value of the charging gun.

[0067] In some embodiments, the current temperature and target output current value can also be input into a pre-built prediction model to obtain the safe fast charging time of the charging gun; the prediction model can be trained based on a training sample set, the training sample set includes multiple training samples and a sample label for each training sample, the training samples include the starting temperature of the charging gun and the historical target output current, the sample label includes the actual time from the starting temperature to the upper temperature limit when the charging gun outputs electrical energy according to the historical target output current, and the prediction model can be a neural network model, etc.

[0068] S107: Control the charging gun to output electrical energy to the vehicle according to the target output current value and the safe fast charging time.

[0069] In this embodiment, the charging gun can be controlled to output electric energy to the vehicle according to the target output current value within the safe fast charging time.

[0070] Optionally, when the duration for which the charging gun outputs electrical energy at the target output current value reaches the safe fast charging duration, the charging gun can be controlled to output electrical energy to the vehicle at the rated current value.

[0071] By applying the method provided in the embodiment of the present application, when the vehicle's required current value is greater than the rated current value of the charging gun, the vehicle can be charged with a current higher than the rated current value, thereby meeting the vehicle's need to charge with a large current in a short time.

[0072] In an embodiment provided in the present application, based on the above solution, optionally, the process of determining the safe fast charging time of the charging gun according to the current temperature of the charging gun and the target output current value in S106 includes:

[0073] According to the current temperature of the charging gun and the target output current value, the preset data table is queried to obtain the safe fast charging time of the charging gun; the safe fast charging time is the maximum allowed time when the charging gun outputs electrical energy at the target output current value at the current temperature.

[0074] In this embodiment, the time when the charging gun reaches the upper temperature limit when the charging gun outputs different currents at different starting temperatures, that is, the safe fast charging time, can be tested first, and then the safe fast charging time at different starting temperatures and different output currents can be recorded in a data table, and the data table can be saved. For example, the starting temperature of the charging gun can be set to 30°C, the output current can be set to 500A, and the upper temperature limit can be set to 100°C. Then, the charging gun can be controlled to perform a charging test at a current of 500A, and the charging time and temperature of the charging gun can be recorded in real time until the temperature of the charging gun reaches 100°C, and the charging gun is controlled to stop the charging test, and the charging time of the charging gun is obtained to be 12 minutes, which is used as the maximum allowable time for the charging gun to output electrical energy at a starting temperature of 30°C and an output current of 500A.

[0075] Furthermore, after saving the data table, when the vehicle has a charging demand, the charging gun is connected to the vehicle to obtain the vehicle's current demand current value; if the vehicle's demand current value is greater than the rated current value of the charging gun, the vehicle's current target output current value is determined, and then the data table is queried based on the current temperature of the charging gun and the target output current value, so that the safe fast charging time corresponding to the current temperature and the target output current value can be determined in the data table.

[0076] Optionally, the temperature range in which the current temperature of the charging gun is located can be determined, the current range in which the target output current value is located can be determined, and the safe fast charging time corresponding to the temperature range and the current range can be determined in the data table.

[0077] In an embodiment provided in the present application, based on the above solution, optionally, controlling the charging gun to output electric energy to the vehicle according to the target output current value and the safe fast charging time includes:

[0078] Control the charging gun to output electric energy to the vehicle according to the target output current value until the preset conditions are met;

[0079] Prerequisites include any of the following:

[0080] The time it takes for the charging gun to output electrical energy at the target output current value reaches the safe fast charging time;

[0081] Or, the demand current value of the vehicle changes;

[0082] Or, the upper limit of the current output of the charging gun changes;

[0083] Or, the temperature of the charging gun reaches the derating temperature threshold.

[0084] In this embodiment, after controlling the charging gun to output electric energy to the vehicle at the target output current value, it is possible to monitor whether the time the charging gun outputs electric energy at the target output current value reaches the safe fast charging time, whether the vehicle's current demand current value changes, whether the current output upper limit value of the charging gun changes, and whether the temperature of the charging gun reaches the derating temperature threshold.

[0085] Optionally, if the vehicle's current demand current value changes, determine whether the changed demand current value is greater than the rated current value of the charging gun; if the changed demand current value is greater than the rated current value of the charging gun, return to execute the step of determining the target output current value of the charging gun in S105; if the changed demand current value is not greater than the rated current value of the charging gun, control the charging gun to output electrical energy to the vehicle according to the changed demand current value.

[0086] Optionally, if the vehicle's current current output upper limit changes, it is determined whether the target output current value has changed. If the target output current value changes or the current range in which the target output current value is located changes, the new safe fast charging time of the charging gun can be determined based on the current temperature of the charging gun and the changed target output current value.

[0087] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes:

[0088] If the time for the charging gun to output electrical energy at the target output current value reaches the safe fast charging time, the charging gun is controlled to output electrical energy to the vehicle according to the rated current value.

[0089] In this embodiment, after the charging gun outputs electricity at the target output current for a safe fast charging period, the charging gun can be controlled to output electricity to the vehicle at the rated current value, and detect whether the current temperature of the charging gun has dropped to a safety threshold. If the current temperature of the charging gun has dropped to the safety threshold and the current demand current value of the vehicle is greater than the rated current, it can return to execute S105.

[0090] The method provided in the application embodiment can effectively improve the charging speed and user satisfaction compared to the existing charging method in which the charging gun always outputs electric energy at the rated current.

[0091] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes:

[0092] If the vehicle's demand current value changes, determine whether the changed demand current value is greater than the rated current value of the charging gun;

[0093] When the changed demand current value is greater than the rated current value of the charging gun, the process returns to the step of determining the target output current value of the charging gun in S105;

[0094] When the changed demand current value is not greater than the rated current value of the charging gun, the charging gun is controlled to output electric energy to the vehicle according to the changed demand current value.

[0095] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes:

[0096] If the target output current value changes, the process returns to the step of determining the safe fast charging time of the charging gun based on the current temperature of the charging gun and the target output current value.

[0097] In this embodiment, the vehicle's demand current value and the charging gun's current output upper limit value may change during the charging process. In this case, the vehicle's demand current value and the charging gun's current output upper limit value can be obtained. After at least one of the demand current value and the current output upper limit value changes, the charging gun's target output current value can be re-determined, and then a new safe fast charging duration can be determined based on the vehicle's current temperature and the new target output current value. The charging gun is then controlled to output electrical energy to the vehicle based on the new target output current value and the new safe fast charging duration, thereby meeting the vehicle's charging needs while ensuring charging safety.

[0098] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes:

[0099] If the temperature of the charging gun reaches the derating temperature threshold, the charging gun is controlled to output electric energy at a first output current value; the first output current value is not greater than the rated current value.

[0100] In this embodiment, the first output current value can be calculated based on the rated current value and a proportionality coefficient, and the proportionality coefficient is not greater than 1, that is, the first output current value is not greater than the rated current value.

[0101] It should be noted that during the charging process of the charging gun, the temperature of the charging gun may rise rapidly due to aging of the charging gun, wear of the gun head resulting in poor contact, etc. Therefore, this embodiment sets a derating temperature threshold. After detecting that the temperature of the charging gun reaches the derating temperature threshold, the output current of the charging gun is reduced to avoid the temperature of the charging gun being too high. This ensures that the temperature of the charging gun is always within a safe temperature range, which can effectively ensure charging safety and avoid affecting the service life of the charging gun.

[0102] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy at the first output current value, the method further includes:

[0103] If the temperature of the charging gun is lower than the safety threshold, the process returns to the step of obtaining the required current value of the vehicle in S102.

[0104] In this embodiment, the safety threshold is less than the derating temperature threshold. After the temperature of the charging gun is lower than the safety threshold, it indicates that the charging gun is currently in a safe state. At this time, the vehicle's demand current value can be reacquired, so that the vehicle can be quickly charged when the vehicle's demand current value is greater than the rated current value.

[0105] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy at the first output current value, the method further includes:

[0106] If the temperature of the charging gun reaches the fault stop charging threshold, the charging gun is controlled to stop outputting power; the fault stop charging threshold is greater than the derating temperature threshold.

[0107] In order to clearly illustrate the implementation principle of the charging control method provided in this application, an air-cooled charging gun with a rated current of 250A is used as an example for explanation below:

[0108] Firstly, the air-cooled gun was tested at different ambient temperatures, i.e., the starting temperature of the charging head (-30°C ~ 80°C), and the boost (fast charging mode) was 300A, 350A, 400A, 450A, 500A, 550A, 600A, until the temperature of the charging gun head reached 100°C, and the temperature-boost time curve.

[0109] Then generate a data table based on the test curve, that is, a data table of boost time supported by different starting gun tip temperatures in different boost current intervals (the boost time in this table will always keep the charging gun in a safe temperature range under normal circumstances and will not affect the charging life). When it is detected that the vehicle's demand current value is greater than the rated current value, the boost mode is entered. At this time, it is necessary to determine the current temperature of the charging gun tip and the actual boost current interval (the current interval where the target output current value is located). According to the current temperature and the current interval where the target output current value is located, query the data table to obtain the preset boost time. If the boost current interval changes, perform a boost reset, that is, re-determine the current gun tip temperature and the time that the current current interval supports boost (which can be obtained from the data table), reset the boost time of the changed boost current interval, and so on. Until the boost ends or the vehicle-side demand decreases, then execute the rated current output of the maximum air-cooled gun until charging is completed.

[0110] If after entering boost mode, the charging current drops to the rated current or below due to various reasons, the boost mode will be exited. If you want to enter boost mode again, the charging gun temperature needs to be lower than the safety threshold temperature L℃ (if the charging demand current is greater than the rated current).

[0111] If an abnormal situation occurs, such as poor contact due to wear of the charging gun head after years of use. Then when executing the boost time in the boost data table. There is a possibility that the gun temperature rises to the derating threshold during the boost process. If the gun temperature rises to the derating temperature threshold X℃ during the boost process, the over-temperature derating protection strategy will be triggered, and the boost mode will be exited. The charging current will drop to P% of the rated current (subject to the derating strategy), and the charging vehicle demand current will be restored when the gun temperature drops to the preset safety threshold L℃. If the vehicle-side demand current is greater than the rated current value, the boost mode can be entered again.

[0112] If the gun temperature rises to the fault stop charging threshold during the boost process, charging will be stopped directly due to a fault.

[0113] The following is an example of boost. The boost time data tables are shown in Table 1 and Table 2. The details are as follows:

[0114] Table 1

[0115]

[0116]

[0117] Among them, Table 1 shows the boost time corresponding to the starting temperature of the gun tip being 5°C to 45°C and the Boost current range being 250A to 600A, the actual boost charging current being x; the current gun tip temperature being y; and the boost time being Tn.

[0118] Table 2

[0119]

[0120] Table 2 shows the boost time corresponding to the starting temperature of the gun tip being 45°C to 80°C and the Boost current range being 250A to 600A.

[0121] If a car can be charged continuously at 380A for 60 minutes, the starting temperature of the charging gun is 30°C. Since the power of the pile itself is occupied by other charging guns, the gun can only charge at 300A (the upper limit of the current output). After the gun charges at 300A for 3 minutes, due to the power release, the gun can charge at 380A (the upper limit of the current output). At this time, the gun temperature is 36°C. Subsequently, the gun continues to charge at 380A until the boost ends and switches to rated charging. The table shows that the time for a 30°C starting gun temperature to support boost 300A is Ta12 min (if Ta12=15), and the table shows that the time for a 36°C starting gun temperature to support boost 380A is Tc14 (if Tc14=10) min. The boost charging curve is as follows: Figure 2 shown.

[0122] If the charging demand of a vehicle is: 380A 3 minutes → 350A 2 minutes → 300A 5 minutes → 250A 5 minutes, the starting temperature of the charging gun is 30℃, and the charging pile power can meet the above requirements (the output current upper limit of the charging pile is not less than the required current value); if the charging gun charges the vehicle at 380A for 3 minutes, the gun temperature rises to 38℃, and then switches to 350A charging for 2 minutes, the gun temperature rises to 42℃, and then switches to 300A charging for 5 minutes, the temperature rises to 50℃, and then switches to rated 250A charging for 5 minutes. The table shows that the time for boost 380A supported by 30℃ starting gun temperature is Tc12 min (if Tc12>3), the time for boost 350A supported by 38℃ starting gun temperature is Tb14 (if Tb14>2) min, the time for boost 300A supported by 42℃ starting gun temperature is Ta15 (if Ta15>5) min, then transfer to rated 250A charging for 5 minutes, the boost charging curve is as follows Figure 3 shown.

[0123] If the charging demand of a car is: 380A 10 minutes → 357A 7 minutes → 300A 5 minutes → 250A 10 minutes, the starting temperature of the charging gun is 66℃ (it can be understood that this situation may be that the previous car has just been boosted and the gun temperature has not dropped yet), the charging pile power can meet the above requirements, and the table shows that the boost 380A time at a gun temperature of 66℃ is Tc20 (if Tc20=10). After boosting 380A for 10 minutes, since the maximum allowable boost charging time is 10 minutes, the boost mode will be jumped out and the rated 250A charging will be switched to. If 250A continues to charge for 10 minutes, the gun temperature drops to the safety threshold temperature y℃ (if y=60), and the boost mode can be entered again (at this time the vehicle-side demand is 300A 5min). According to the gun temperature of 60℃300A, the boost time is Ta18 (if Ta18=5). The charging curve is as follows Figure 4That is, in this case, the charging current of 357A is not responded.

[0124] Among them, at 20min, because the gun temperature drops to the safety threshold temperature y℃ (if y=60), the vehicle-side charging demand is 300A 5min at this time, and the boost mode can be entered again. After boost 300A is completed for 5 minutes, the maximum charge of the vehicle-side is 250A, which is the rated current of the pile, and the subsequent charging will not enter the boost mode.

[0125] By applying the method provided in the embodiment of the present application, the charging requirements of 400-600A for some vehicle models can be met when using an air-cooled gun, and the problems of large liquid-cooled charging losses, high costs, and difficult maintenance can be avoided, thereby increasing the operator's profits; it can also ensure that the temperature of the charging gun is always maintained within a safe range and will not affect its lifespan.

[0126] and Figure 1 Corresponding to the method, the embodiment of the present application also provides a charging control device for Figure 1 The specific implementation of the method is shown in the following diagram: Figure 5 As shown, including:

[0127] An acquisition unit 501 is used to acquire a current demand current value of the vehicle when the charging gun is connected to the vehicle;

[0128] A first determining unit 502 is used to determine a target output current value of the charging gun when the required current value is greater than the rated current value of the charging gun, the target output current value being the smaller of the required current value and the current output upper limit value of the charging gun;

[0129] The second determining unit 503 is used to determine the safe fast charging time of the charging gun according to the current temperature of the charging gun and the target output current value;

[0130] The control unit 504 is used to control the charging gun to output electrical energy to the vehicle according to the target output current value and the safe fast charging time.

[0131] In an embodiment provided in the present application, based on the above solution, optionally, the second determining unit 503 includes:

[0132] The query subunit is used to query the preset data table according to the current temperature of the charging gun and the target output current value to obtain the safe fast charging time of the charging gun; the safe fast charging time is the maximum allowed time when the charging gun outputs electrical energy at the target output current value at the current temperature.

[0133] In an embodiment provided in the present application, based on the above solution, optionally, the control unit 504 includes:

[0134] The first control subunit is used to control the charging gun to output electric energy to the vehicle according to the target output current value until a preset condition is met;

[0135] The preset condition includes any one of the following:

[0136] The duration for the charging gun to output electric energy according to the target output current value reaches the safe fast charging duration;

[0137] Alternatively, the demand current value of the vehicle changes;

[0138] Alternatively, the upper limit value of the current output of the charging gun changes;

[0139] Alternatively, the temperature of the charging gun reaches a derating temperature threshold.

[0140] In an embodiment provided in the present application, based on the above solution, optionally, the control unit 504 further includes:

[0141] The second control subunit is used to control the charging gun to output electric energy to the vehicle according to the rated current value if the time for the charging gun to output electric energy at the target output current value reaches the safe fast charging time.

[0142] In an embodiment provided in the present application, based on the above solution, optionally, the control unit 504 further includes:

[0143] a determination subunit, configured to determine, if the required current value of the vehicle changes, whether the changed required current value is greater than the rated current value of the charging gun;

[0144] a third control subunit, configured to return to trigger the first determination unit to execute the step of determining the target output current value of the charging gun when the changed required current value is greater than the rated current value of the charging gun;

[0145] The fourth control subunit is used to control the charging gun to output electric energy to the vehicle according to the changed demand current value when the changed demand current value is not greater than the rated current value of the charging gun.

[0146] In an embodiment provided in the present application, based on the above solution, optionally, the control unit 504 further includes:

[0147] The fifth control subunit is used to control the charging gun to output electric energy at a first output current value if the temperature of the charging gun reaches a derating temperature threshold; the first output current value is not greater than the rated current value.

[0148] In an embodiment provided in the present application, based on the above solution, optionally, after controlling the charging gun to output electric energy at the first output current value, the method further includes:

[0149] The sixth control subunit is used to return to trigger the acquisition unit to execute the step of acquiring the required current value of the vehicle if the temperature of the charging gun is lower than the safety threshold.

[0150] In an embodiment provided in the present application, based on the above solution, optionally, the charging control device further includes:

[0151] The execution unit is used to control the charging gun to stop outputting electric energy if the temperature of the charging gun reaches a fault stop charging threshold; the fault stop charging threshold is greater than the derating temperature threshold.

[0152] The specific principles and execution processes of each unit and module in the charging control device disclosed in the above-mentioned embodiment of the present application are the same as the charging control method disclosed in the above-mentioned embodiment of the present application. Please refer to the corresponding parts of the charging control method provided in the above-mentioned embodiment of the present application, and will not be repeated here.

[0153] An embodiment of the present application further provides a storage medium, the storage medium including stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the above-mentioned charging control method.

[0154] The present application also provides an electronic device, whose structural diagram is as follows: Figure 6 As shown, it specifically includes a memory 601 and one or more instructions 602, wherein the one or more instructions 602 are stored in the memory 601 and are configured to be executed by one or more processors 603 to perform the following operations:

[0155] When the charging gun is connected to the vehicle, obtain the current demand current value of the vehicle;

[0156] When the required current value is greater than the rated current value of the charging gun, a target output current value of the charging gun is determined, where the target output current value is the smaller of the required current value and the current output upper limit value of the charging gun;

[0157] Determine the safe fast charging time of the charging gun based on the current temperature of the charging gun and the target output current value;

[0158] The charging gun is controlled to output electrical energy to the vehicle according to the target output current value and the safe fast charging time.

[0159] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0160] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0161] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0162] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly contributed to the prior art in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0163] The above is a detailed introduction to a charging control method provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A charging control method, characterized in that: include: When the charging gun is connected to the vehicle, the current demand current value of the vehicle is obtained; When the required current value is greater than the rated current value of the charging gun, determining a target output current value of the charging gun, the target output current value being the smaller of the required current value and an upper limit value of the current output of the charging gun; Determining a safe fast charging time of the charging gun according to the current temperature of the charging gun and the target output current value; The charging gun is controlled to output electrical energy to the vehicle according to the target output current value and the safe fast charging duration.

2. The method according to claim 1, characterized in that The step of determining the safe fast charging duration of the charging gun according to the current temperature of the charging gun and the target output current value includes: The preset data table is queried according to the current temperature of the charging gun and the target output current value to obtain the safe fast charging time of the charging gun; the safe fast charging time is the maximum allowed time when the charging gun outputs electrical energy at the target output current value at the current temperature.

3. The method according to claim 1, characterized in that The controlling the charging gun to output electric energy to the vehicle according to the target output current value and the safe fast charging duration includes: Controlling the charging gun to output electric energy to the vehicle according to the target output current value until a preset condition is met; The preset condition includes any one of the following: The duration for the charging gun to output electric energy according to the target output current value reaches the safe fast charging duration; Alternatively, the demand current value of the vehicle changes; Alternatively, the upper limit value of the current output of the charging gun changes; Alternatively, the temperature of the charging gun reaches a derating temperature threshold.

4. The method according to claim 3, characterized in that After controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes: If the duration for which the charging gun outputs electric energy at the target output current value reaches the safe fast charging duration, the charging gun is controlled according to the rated current value to output electric energy to the vehicle.

5. The method according to claim 3, characterized in that: After controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes: If the required current value of the vehicle changes, determining whether the changed required current value is greater than the rated current value of the charging gun; When the changed demand current value is greater than the rated current value of the charging gun, returning to the step of determining the target output current value of the charging gun; When the changed demand current value is not greater than the rated current value of the charging gun, the charging gun is controlled to output electric energy to the vehicle according to the changed demand current value.

6. The method according to claim 3, characterized in that After controlling the charging gun to output electric energy to the vehicle according to the target output current value, the method further includes: If the temperature of the charging gun reaches the derating temperature threshold, the charging gun is controlled to output electric energy at a first output current value; the first output current value is not greater than the rated current value.

7. The method according to claim 6, characterized in that After controlling the charging gun to output electric energy at the first output current value, the method further includes: If the temperature of the charging gun is lower than the safety threshold, the process returns to the step of obtaining the required current value of the vehicle.

8. The method according to claim 6, characterized in that After controlling the charging gun to output electric energy at the first output current value, the method further includes: If the temperature of the charging gun reaches a fault-stop charging threshold, the charging gun is controlled to stop outputting electric energy; the fault-stop charging threshold is greater than the derating temperature threshold.

9. A charging control device, characterized in that: include: An acquisition unit, used to acquire a current demand current value of the vehicle when the charging gun is connected to the vehicle; a first determining unit, configured to determine a target output current value of the charging gun when the required current value is greater than a rated current value of the charging gun, the target output current value being the smaller of the required current value and an upper limit value of a current output of the charging gun; A second determining unit, configured to determine a safe fast charging duration of the charging gun according to a current temperature of the charging gun and the target output current value; A control unit is used to control the charging gun to output electrical energy to the vehicle according to the target output current value and the safe fast charging duration.

10. A storage medium, characterized in that: The storage medium includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the charging control method according to any one of claims 1 to 8.

11. An electronic device, characterized in that: The device comprises a memory and one or more instructions, wherein the one or more instructions are stored in the memory and configured to be executed by one or more processors to execute the charging control method according to any one of claims 1 to 8.

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