Boost charging power monitoring method, device, medium and vehicle

Abstract

This disclosure relates to a method, device, medium, and vehicle for monitoring boost charging power. The method includes: acquiring real-time power during continuous charging; determining power fluctuations based on the real-time power; determining whether a single power fluctuation exceeds a preset power fluctuation value and the number of consecutive occurrences exceeds a first preset number of occurrences based on the power fluctuations; and identifying the maximum available power when a single power fluctuation exceeds the preset power fluctuation value and the number of consecutive occurrences exceeds the first preset number of occurrences. Based on this, a method for identifying power oscillations during boost charging is provided, enabling the identification of potential power oscillations during charging, thereby facilitating further power stabilization, mitigating the impact of power oscillations on the charging system, and extending the service life of the charging pile.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to a method, device, medium, and vehicle for monitoring boost charging power. Background Technology

[0002] Current DC fast charging stations for electric vehicles are generally equipped with two or more charging guns. During the interaction between the charging station and the vehicle's charging parameters, regardless of whether the charging station is charging other vehicles, the charging station will directly send the maximum charging power of the charging station to the vehicle. Then, the vehicle will send its maximum charging power request according to its own needs, and the charging station will charge the vehicle's battery according to the maximum charging power request sent by the vehicle.

[0003] However, most DC fast charging stations cannot meet the maximum power demands of two or more vehicles. In actual use, the power demands of vehicles often change frequently. For example, a charging station might only have one vehicle charging at a given moment, then a second vehicle starts charging ten minutes later, and the first vehicle finishes charging twenty minutes later. During this process, the power demands the charging station needs to meet change frequently, resulting in significant charging fluctuations. Current technology cannot promptly identify the maximum available power of the charging station. Therefore, for vehicles equipped with boost charging capabilities, the vehicle charges according to the maximum power demand of the charging station. If the remaining available power of the charging station is insufficient, power oscillations will occur in the charging system, impacting the charging system and affecting the lifespan of the charging station. Summary of the Invention

[0004] To address the aforementioned technical issues, this disclosure provides a boost charging power monitoring method, device, medium, and vehicle to identify the maximum available power, thereby facilitating further power stabilization, mitigating the impact of power oscillations on the charging system, and extending the service life of the charging pile.

[0005] Firstly, this disclosure provides a method for monitoring boost charging power, including:

[0006] Obtain real-time power during continuous charging;

[0007] Based on the real-time power, power fluctuations are determined;

[0008] Based on the power fluctuation, determine whether the value of a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number.

[0009] When a single power fluctuation is determined to be greater than a preset power fluctuation, and the number of consecutive occurrences is greater than a first preset number, the maximum available power is identified.

[0010] Optionally, determining the power fluctuation based on the real-time power includes:

[0011] Based on the real-time power, a reference power is determined; the reference power is the maximum power that increases at a preset rate, or the power corresponding to a stable duration that is longer than a preset stable duration.

[0012] The power fluctuation is extracted from the real-time power by combining the reference power.

[0013] Optionally, obtaining the real-time power includes: obtaining the input voltage of the boost module corresponding to the battery to be charged;

[0014] The step of determining power fluctuation based on the real-time power includes: determining voltage fluctuation based on the input voltage;

[0015] The step of determining whether the power fluctuation is greater than a preset power fluctuation includes: determining whether the voltage fluctuation is greater than a first preset voltage fluctuation.

[0016] Optionally, after identifying the maximum available power, the method further includes:

[0017] By combining the real-time power and the power fluctuation, the power adjustment amount is reduced based on the real-time power to determine the maximum available stable power.

[0018] Optionally, before determining the maximum available stable power, the method further includes:

[0019] Timing begins when the maximum available power is detected, and the duration of the fluctuation is obtained.

[0020] Determining the maximum available stable power includes:

[0021] The power adjustment amount is determined based on the power fluctuation and the duration of the fluctuation;

[0022] The difference between the real-time power and the power adjustment amount is the maximum available stable power.

[0023] Wherein, the maximum available stable power is less than the maximum available power, and the difference between the maximum available stable power and the maximum available power is greater than the power fluctuation; the maximum available power is the output power of the boost module of the battery to be charged when the value of a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number.

[0024] Optionally, after determining the maximum available stable power, the method further includes:

[0025] Identify the voltage fluctuation corresponding to the maximum available stable power;

[0026] When the voltage fluctuation corresponding to the maximum available stable power is less than the second preset voltage fluctuation, and the number of consecutive occurrences is greater than the second preset number, the maximum available stable power is determined as the current target charging power.

[0027] Optionally, determining the power adjustment amount based on the power fluctuation and the duration of the fluctuation includes:

[0028] Based on the fluctuation duration and the first correlation, the power reduction coefficient corresponding to the current fluctuation duration is determined; wherein, the first correlation is the correlation between the power reduction coefficient and the fluctuation duration;

[0029] Based on the power reduction factor, the power fluctuation, and the second correlation, the power adjustment amount is determined; wherein, the second correlation is the correlation between the power adjustment amount, the power reduction factor, and the power fluctuation.

[0030] Optionally, the real-time power is characterized by the input voltage of the boost module;

[0031] Determining the power adjustment amount based on the power fluctuation and the duration of the fluctuation includes:

[0032] The voltage adjustment amount is determined based on the voltage fluctuation and the duration of the fluctuation.

[0033] Optionally, determining the voltage adjustment amount based on the voltage fluctuation and the duration of the fluctuation includes:

[0034] Based on the fluctuation duration and the first correlation, the pressure reduction coefficient corresponding to the current fluctuation duration is determined; wherein, the first correlation is the correlation between the pressure reduction coefficient and the fluctuation duration;

[0035] Based on the voltage drop factor, the voltage fluctuation, and the second correlation, the voltage adjustment amount is determined; wherein, the second correlation is the correlation between the voltage adjustment amount, the voltage drop factor, and the voltage fluctuation.

[0036] Optionally, after determining the current target charging power, the method further includes:

[0037] Based on the current target charging power, the input voltage and / or current are adjusted in real time.

[0038] Secondly, this disclosure also provides a boost charging power monitoring device, comprising:

[0039] The power acquisition module is used to acquire the real-time power during continuous charging.

[0040] A power fluctuation determination module is used to determine power fluctuations based on the real-time power.

[0041] The judgment module is used to determine, based on the power fluctuation, whether the value of a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number.

[0042] The identification module is used to identify the maximum available power when it is determined that a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number.

[0043] Thirdly, this disclosure also provides a computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of the boost charging power monitoring method described in any of the first aspects above.

[0044] Fourthly, this disclosure also provides a vehicle, including: a processor and a memory;

[0045] The processor executes the steps of the boost charging power monitoring method described in any of the first aspects by calling the program or instructions stored in the memory.

[0046] The boost charging power monitoring method disclosed herein can acquire real-time power during continuous charging, determine power fluctuations based on real-time power, and determine whether a single power fluctuation exceeds a preset power fluctuation and the number of consecutive occurrences exceeds a first preset number. When a single power fluctuation exceeds the preset power fluctuation and the number of consecutive occurrences exceeds the first preset number, the maximum available power is identified. This method, by determining power fluctuations based on real-time power and promptly identifying the maximum available power when the power fluctuation exceeds the preset power fluctuation and the number of consecutive occurrences exceeds the first preset number, achieves the identification of potential power oscillations during charging. This, in turn, helps to further stabilize power, mitigate the impact of power oscillations on the charging system, and extend the service life of the charging pile. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0048] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1This is a schematic flowchart of a boost charging power monitoring method provided in an embodiment of the present disclosure;

[0050] Figure 2 for Figure 1 The detailed flowchart of S102 in the method shown is as follows;

[0051] Figure 3 A graph showing the relationship between the time of voltage fluctuation and the input voltage and charging current of the boost module;

[0052] Figure 4 A graph showing the relationship between time, charging current, and input voltage of the boost module;

[0053] Figure 5 This is a schematic diagram of a boost charging power monitoring device provided in an embodiment of the present disclosure;

[0054] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0055] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0056] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0057] The following description, in conjunction with the accompanying drawings, provides an exemplary illustration of the sound pressure charging power monitoring method, apparatus, medium, and vehicle provided in the embodiments of this disclosure.

[0058] Figure 1 This is a schematic flowchart of a boost charging power monitoring method provided in an embodiment of the present disclosure. The method includes:

[0059] S101: Obtain the real-time power during continuous charging.

[0060] S102: Determine power fluctuations based on real-time power.

[0061] S103: Based on power fluctuation, determine whether the value of a single power fluctuation is greater than the preset power fluctuation and the number of consecutive occurrences is greater than the first preset number. If yes, execute S104; otherwise, return to S101.

[0062] S104: Identify maximum available power.

[0063] Through their research, the inventors discovered that when the charging pile's output power meets the maximum usable power, the real-time power will fluctuate significantly. For example, the real-time power might be 88 kW at one moment, but 80 kW the next second later, exhibiting a large fluctuation range. Furthermore, when the maximum usable power is met, the real-time power fluctuation occurs frequently, meaning multiple consecutive fluctuations occur, rather than sporadically. Therefore, when the power fluctuation exceeds a preset power fluctuation and the number of consecutive occurrences exceeds a first preset number, it can be determined that the maximum usable power has been reached. For example, if the preset power fluctuation is 5 kW and the first preset number is 5 times, and if the real-time power fluctuates by 10 kW for 10 consecutive times, it can be determined that the maximum usable power has been reached.

[0064] Specifically, real-time power during continuous charging refers to the real-time power provided by the charging pile when charging a vehicle. If the vehicle's power demand exceeds the maximum available stable power the charging pile can provide, and the charging pile continues to charge the vehicle according to its power demand, then real-time power fluctuations will occur. In this case, the power output by the charging pile to the vehicle can be considered the maximum available power. Therefore, if the value of a single power fluctuation exceeds a preset power fluctuation, and the number of consecutive occurrences exceeds a first preset number, then power fluctuations can be identified. This allows for the identification of potential power fluctuations during charging, which in turn helps to further stabilize power, mitigate the impact of power fluctuations on the charging system, and extend the lifespan of the charging pile.

[0065] Figure 2 for Figure 1 The detailed flowchart of the method shown, S102, may include, in some embodiments, S102:

[0066] S201: Determine the reference power based on the real-time power. The reference power is the maximum power that increases at a preset rate, or the power corresponding to a stabilization period longer than the preset stabilization period.

[0067] S202: Combined with reference power, extract power fluctuations from real-time power.

[0068] Power fluctuation refers to the change in power. During normal charging, the power can be considered constant, or at least the fluctuation range is small and maintained within a certain range. For example, during normal charging, the power fluctuation is less than or equal to the preset power fluctuation. Only when an anomaly occurs will the power fluctuation exceed the preset power fluctuation. Alternatively, during the initial period of charging, the power will continuously increase. Although the power is constantly changing, the slope of the power change over time remains relatively stable. Therefore, the power fluctuation will still remain within a fixed range, or in other words, the power fluctuation is relatively constant. If an anomaly occurs, the power fluctuation will exceed the preset power fluctuation.

[0069] In some implementations, obtaining real-time power includes obtaining the input voltage of the boost module corresponding to the battery to be charged.

[0070] Based on real-time power, power fluctuations are determined, including: based on input voltage, voltage fluctuations are determined.

[0071] Determining whether the power fluctuation is greater than the preset power fluctuation includes: determining whether the voltage fluctuation is greater than the first preset voltage fluctuation.

[0072] The maximum available power identification conditions are met, including: voltage fluctuation is greater than the first preset voltage fluctuation, and the number of consecutive occurrences is greater than the second preset number.

[0073] The battery to be charged refers to the battery in the vehicle in the above embodiments. Charging the vehicle is essentially charging the battery to be charged. Therefore, in this embodiment, charging the battery to be charged and charging the vehicle can have the same meaning.

[0074] One method to obtain real-time power is to acquire the input voltage and current of the boost module of the battery to be charged, and then determine the real-time power based on the voltage and current.

[0075] Figure 3 This is a graph showing the relationship between the time of voltage fluctuation and the input voltage and charging current of the boost module. Figure 3The horizontal axis T represents time, the vertical axis U represents the input voltage of the boost module, and the vertical axis I represents the charging current. During the power ramp-up control process, the derating voltage 37 remains constant, and the input voltage 31 of the boost module is generally constant and equal to the output voltage 32 of the charging pile. However, if the output power is too high, power oscillation will occur. At this time, the target charging current 33 is greater than the available charging current 34 of the charging pile, and the input voltage 31 and charging current 36 of the boost module will fluctuate. That is, the input voltage 31 of the boost module changes continuously, and the voltage fluctuation 35 can be the difference between the maximum and minimum values ​​of the input voltage. At this time, the charging current 36 will also fluctuate. At time T4, the charging current 33 increases to the available charging current of the charging pile and continues to increase. However, since it has reached the limit of the available charging current of the charging pile, continuing to increase the charging current 34 causes the input voltage 31 and charging current 36 of the boost module to start to fluctuate, and the real-time power fluctuates accordingly. If the absolute value of voltage fluctuation 35 is greater than the first preset voltage fluctuation, and the number of consecutive occurrences is greater than the first preset number, that is, if the absolute value of voltage fluctuation 35 is greater than the first preset voltage fluctuation, and the number of consecutive occurrences is greater than the first preset number, then it can be determined that power oscillation has occurred. At this time, the current output power of the boost module is considered to be the maximum available power. Generally speaking, the maximum available power is greater than the maximum available stable power.

[0076] In some implementations, after identifying the maximum available power, the method further includes:

[0077] By combining the real-time power and the power fluctuation, the power adjustment amount is reduced by the real-time power to determine the maximum available stable power.

[0078] In some implementations, the method further includes determining the maximum available stable power before:

[0079] Timing begins when the maximum available power is detected, and the duration of the fluctuation is recorded.

[0080] Fluctuation duration refers to the duration of power fluctuations. By determining the fluctuation duration, the maximum available stable power can be determined more accurately.

[0081] Determine the maximum available stable power, including:

[0082] The power adjustment amount is determined based on the power fluctuation and its duration.

[0083] The difference between the real-time power and the power adjustment is the maximum available stable power.

[0084] Among them, the maximum available stable power is less than the maximum available power, and the difference between the maximum available stable power and the maximum available power is greater than the power fluctuation; the maximum available power is the output power of the boost module of the battery to be charged when the value of a single power fluctuation is greater than the preset power fluctuation and the number of consecutive occurrences is greater than the first preset number.

[0085] In some implementations, the power adjustment amount is determined based on power fluctuations and their duration, including:

[0086] Based on the fluctuation duration and the first correlation, the power reduction coefficient corresponding to the current fluctuation duration is determined. The first correlation is the relationship between the power reduction coefficient and the fluctuation duration.

[0087] The power adjustment amount is determined based on the power reduction factor, power fluctuation, and a second correlation. The second correlation is the relationship between the power adjustment amount and the power reduction factor and power fluctuation.

[0088] The maximum available stable power is determined based on the maximum available power and the power adjustment amount.

[0089] In some implementations, the maximum available stable power is determined based on the maximum available power and the power adjustment amount, including:

[0090] The difference between the maximum available power and the power adjustment amount is the maximum available stable power.

[0091] Specifically, timing can begin after the maximum available power is determined, resulting in a duration T. Then, the power reduction factor KT is determined according to the first correlation table shown in Table 1 below.

[0092] Table 1 - First Relationship Table

[0093] Power reduction factor KT 1 1.1 1.2 1.5 2 3

[0094] As shown in Table 1, for example, if the fluctuation duration is 3 minutes, the power reduction coefficient KT can be determined to be 1.

[0095] After determining the power reduction factor KT, the power adjustment amount M can be determined according to the second correlation table shown in Table 2 below.

[0096] Table 2 - Second Relationship Table

[0097] Power adjustment amount M (unit: kilowatts) 3*KT 4*KT 5*KT 6*KT 7*KT 8*KT

[0098] As shown in Table 2, the power adjustment amount M can be determined based on the power fluctuation H and the power reduction factor KT. For example, if the power reduction factor KT is 1 and the power fluctuation is 35V, the power adjustment amount can be determined to be 6 kW. Assuming the maximum available power is 100 kW, the maximum available stable power can be finally determined to be 94 kW.

[0099] The maximum available stable power can be accurately determined using the method described above.

[0100] In some implementations, after determining the maximum available stable power, the method further includes:

[0101] Identify the power fluctuations corresponding to the maximum available stable power.

[0102] When the power fluctuation corresponding to the maximum available stable power is less than the second preset power fluctuation, and the number of consecutive occurrences is greater than the second preset number, the maximum available stable power is determined as the current target charging power.

[0103] After determining the maximum available stable power, it is necessary to verify the maximum available stable power again. For example, determine the power fluctuation corresponding to the maximum available stable power. If the power fluctuation corresponding to the maximum available stable power is less than the second preset power fluctuation, and the number of consecutive occurrences is greater than the second preset number, it means that the charging pile can charge the vehicle with this maximum available stable power. Therefore, the maximum available stable power can be determined as the current target charging power.

[0104] In some implementations, real-time power is characterized by the input voltage of the boost module;

[0105] Based on power fluctuations and their duration, the power adjustment amount is determined, including:

[0106] The voltage adjustment amount is determined based on the voltage fluctuation and its duration.

[0107] In some implementations, the voltage adjustment amount is determined based on the voltage fluctuation and its duration, including:

[0108] Based on the duration of the fluctuation and the first correlation, the pressure reduction coefficient corresponding to the current fluctuation duration is determined. The first correlation is the relationship between the pressure reduction coefficient and the fluctuation duration.

[0109] The voltage adjustment amount is determined based on the step-down factor, voltage fluctuation, and a second correlation. The second correlation is the relationship between the voltage adjustment amount and the step-down factor and voltage fluctuation.

[0110] In some implementations, after determining the current target charging power, the method further includes:

[0111] Based on the current target charging power, the input voltage and / or current are adjusted in real time.

[0112] For example, if the input voltage is fixed at 300V and the maximum available charging power is 120 kilowatts, then the input current can be adjusted to 40A.

[0113] The above method can be used to adjust the output power to the target charging power.

[0114] Taking a certain charging station as an example, different charging strategies can be adopted in different scenarios or at different times.

[0115] For example, a charging strategy with power ramp-up control can be used.

[0116] Alternatively, a charging strategy could be adopted that includes power ramp-up control, maximum available power identification, target charging power stabilization control, and upward detection of the maximum available stable power cycle until the target charging power remains stable.

[0117] Alternatively, a charging strategy can be adopted that involves identifying the maximum available power, stabilizing the target charging power, probing the maximum available stable power upwards, and cycling through power ramp-up control until the target charging power remains stable.

[0118] Alternatively, a charging strategy can be adopted that involves cycling through upward detection of the maximum available stable power, power ramp-up control, maximum available power identification, and target charging power stabilization control until the target charging power remains stable.

[0119] The power ramp-up control may include: in a first time period, controlling the charging power to increase based on a preset correspondence between a first ramp-up slope k0 and a first voltage difference U0; wherein, the first voltage difference U0 is the difference between the input voltage and the derating voltage of the boost module corresponding to the battery to be charged, and the first ramp-up slope k0 increases as the first voltage difference U0 decreases; the first time period ends when the duration of the first time period is greater than a first preset duration, the real-time charging power is greater than a first preset charging power, and the absolute value of the first voltage difference U0 is less than the first preset voltage difference and the duration is greater than a second preset duration.

[0120] In the second time period, the charging power is controlled to increase based on the preset second rising slope, and the second rising slope is equal to or greater than the maximum value of the first rising slope. During the charging power increase, the first pressure difference is equal to or less than the second preset pressure difference. When the first pressure difference is greater than the second preset pressure difference or the difference between the real-time charging power and the target charging power of this stage is less than the first preset power difference, the second time period ends.

[0121] In the third time period, the charging power is controlled to increase based on the preset correspondence between the third rising slope and the power difference. The power difference is the difference between the required charging power and the real-time charging power. As the power difference decreases, the third rising slope decreases, and the maximum value of the third rising slope is equal to or less than the second rising slope. The third time period ends when the power difference is less than the preset power difference.

[0122] Figure 4 This is a graph showing the relationship between time, charging current, and the input voltage of the boost module. Figure 4 The horizontal axis T represents time, the vertical axis U represents the input voltage of the boost module, and the vertical axis I represents the charging current. Specifically, the power ramp-up control can be divided into three time periods. In the time period corresponding to T0-T1, i.e., the first time period, the battery to be charged has just started charging, the output voltage 41 of the charging pile is equal to the input voltage 42 of the boost module, the charging current 43 slowly rises, and the charging power is also constantly increasing. During the process of the charging current 43 rising, the rate of change of the charging current 43 can be continuously changed and adjusted. On the time-current coordinate axis curve, this is represented by the slope of the current-corresponding curve constantly changing, that is, the first rising slope k0 is constantly changing. By constantly changing the first rising slope k0, the current can be adjusted to ensure that the current does not fall below zero, that is, to ensure that the current does not flow from the battery to be charged to the charging pile.

[0123] The derating voltage 44 is a preset voltage value. It is generally assumed that the derating voltage 44 is constant. Determining the first voltage difference based on the derating voltage 44 can ensure voltage stability and avoid a significant voltage drop.

[0124] As shown in Table 3 below, for example, if the first voltage difference U0 is detected to be 8V at a certain moment in the first time period, then the first rising slope k0 can be adjusted to 5A / min. If the first voltage difference U0 is detected to be 15V at the next moment, then the first rising slope k0 can be adjusted to 4A / min. By continuously controlling the first rising slope based on the first voltage difference, the charging power can be increased steadily.

[0125] Table 3 - Correspondence between the first upward slope k0 and the first pressure difference U0

[0126]

[0127] If the duration of the first time period is longer than the first preset duration, the actual charging power is greater than the first preset charging power, the absolute value of the first voltage difference U0 is less than the first preset voltage difference, and the duration of the first time period is longer than the second preset duration, for example, if the duration of the first time period is 30 minutes, the first preset duration is 20 minutes, the actual charging power has reached 30 kW, the first preset charging power is 20 kW, the absolute value of the first voltage difference U0 is 5V, the first preset voltage difference is 10V, the second preset duration is 30 minutes, and the duration of the first voltage difference being less than the first preset voltage difference is 40 minutes, then it can be determined that the actual charging power has stabilized and lasted for a certain period of time, and the first time period can be ended.

[0128] During the time period T1-T2, i.e., the second time period, the input voltage 41 of the buck module can remain constant, while the charging current 43 rises rapidly. Correspondingly, the charging power also rises rapidly. During this time period, it is still necessary to ensure that the first voltage difference is less than or equal to the second preset voltage difference, that is, it is still necessary to ensure the stability of the charging power and prevent oscillations. During this process, the charging current 43 rises rapidly, so the second rising slope k1 during this time period needs to be greater than or at least equal to the maximum value of the first rising slope k0. The second rising slope k1 during this time period can be a fixed value. At this time, the charging current 43 is less than the target charging current 45 and less than the available current 46 of the charging pile. If the first voltage difference U0 is greater than the second preset voltage difference or the difference between the real-time charging power and the target power of this stage is less than the preset power difference, it means that the charging power is close to its limit. Continuing to rise may cause continuous power oscillations, so the second time period can be ended.

[0129] During the time period T2-T3, i.e., the third time period, the charging current 43 slowly increases again, and therefore the corresponding charging power also slowly increases. After continuous adjustment of the charging current 43, it eventually reaches or at least approaches the target charging current 46. The real-time charging power eventually reaches or at least approaches the required charging power, meaning the absolute value of the difference between the real-time charging power and the required charging power is less than or equal to the preset power difference. Table 4 below shows the correspondence between the preset third rising slope k2 and the power difference P0.

[0130] Table 4 - Correspondence between the third ascending slope k2 and the power difference P0

[0131]

[0132] As shown in Table 4, for example, if the power difference P0 at a certain moment is 7 kW, then the third rising slope k2 can be adjusted to 3 amps / minute. Or, for example, if the power difference P0 at a certain moment is -1 kW, meaning the actual real-time charging power is already greater than the required charging power, then the real-time charging power needs to be reduced. Under the condition that the charging voltage remains constant, the charging current 41 can be slowly reduced. Even if the third rising slope k2 is negative, the real-time charging power will also slowly decrease as the charging current 41 decreases. The overall idea in this process is that as the real-time charging power gets closer to the required charging power, the adjustment range of the real-time charging power should become smaller and smaller, that is, the adjustment range of the charging current 41 should become smaller and smaller, ultimately reflected in the third rising slope approaching zero.

[0133] By using the power ramp-up control method described above, the charging power can be precisely controlled in charging scenarios where the power is sufficient. This ensures that the real-time charging power is equal to or at least close to the required charging power while preventing power oscillations and overcharging.

[0134] Detecting the maximum available stable power can include: based on the maximum output power and the maximum demand power, and using power ramp-up control to increase real-time charging power. Based on maximum available power identification and target charging power stabilization control, the maximum available stable power is determined and set as the target charging power.

[0135] Before probing upwards for the maximum available stable power, it may also include:

[0136] Based on the output power and the required power, it is determined that the output power is greater than the required power, and the difference between the output power and the required power is equal to or greater than the second preset power difference.

[0137] The duration for which the vehicle maintains its current maximum available stable power is obtained, and it is determined that the duration for which the vehicle maintains its current maximum available charging power is equal to or greater than a third preset duration.

[0138] The process of determining the maximum available power and the target charging power can be referred to the relevant description in the above embodiments, and will not be repeated here for the sake of brevity.

[0139] By employing the different charging strategies described above, the target charging power, i.e. the maximum available stable power, is used to charge the vehicle (battery to be charged). This avoids power oscillations in the charging system when the remaining available power of the charging pile is insufficient, thus preventing impact on the charging pile's charging system and extending the charging pile's lifespan.

[0140] Figure 5 This is a schematic diagram of a boost charging power monitoring device provided in an embodiment of the present disclosure. The device includes:

[0141] The power acquisition module 501 is used to acquire the real-time power during continuous charging.

[0142] The power fluctuation determination module 502 is used to determine power fluctuations based on real-time power.

[0143] The judgment module 503 is used to determine, based on power fluctuation, whether the value of a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number.

[0144] The determination module 504 is used to identify the maximum available power when it is determined that a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number.

[0145] This disclosure also provides a computer-readable storage medium that stores a program or instructions that cause a computer to perform the steps of any of the methods provided in the above embodiments.

[0146] In some embodiments, when executed by a computer processor, the computer-executable instructions can also be used to execute the technical solution of the boost charging power monitoring method provided in the embodiments of this disclosure, thereby achieving the corresponding beneficial effects.

[0147] This disclosure also provides an electronic device, including a processor and a memory; the processor executes the steps of any of the methods provided in the above embodiments by calling programs or instructions stored in the memory, thereby achieving the corresponding beneficial effects.

[0148] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Figure 6 As shown, the electronic device includes one or more processors 601 and memory 602.

[0149] The processor 601 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0150] The memory 602 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 601 may execute the program instructions to implement the methods of the embodiments of this disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0151] In one example, the electronic device may also include an input device 603 and an output device 604, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0152] In addition, the input device 603 may also include, for example, a keyboard, a mouse, etc.

[0153] The output device 604 can output various information to the outside, including determined distance information, direction information, etc. The output device 604 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0154] Of course, for the sake of simplicity, Figure 6 Only some of the components of the electronic device relevant to this disclosure are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0155] It should be noted that the aforementioned electronic devices can be installed in the vehicle, specifically in the in-vehicle system, such as the battery management system; or they can be other terminal devices outside the vehicle, such as mobile phones, computers, smart wearable devices, and other electronic devices, which are not limited here.

[0156] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0157] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for monitoring boost charging power, characterized in that, include: Obtain real-time power during continuous charging; Based on the real-time power, power fluctuations are determined; Based on the power fluctuation, determine whether the value of a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number. When it is determined that a single power fluctuation is greater than a preset power fluctuation, and the number of consecutive occurrences is greater than the first preset number, the maximum available power is identified; wherein, the power fluctuation includes power oscillation.

2. The boost charging power monitoring method as described in claim 1, characterized in that, The determination of power fluctuation based on the real-time power includes: Based on the real-time power, a reference power is determined; the reference power is the maximum power that increases at a preset rate, or the power corresponding to a stable duration that is longer than a preset stable duration. The power fluctuation is extracted from the real-time power by combining the reference power.

3. The boost charging power monitoring method as described in claim 1, characterized in that, Obtaining the real-time power includes: obtaining the input voltage of the boost module corresponding to the battery to be charged; The step of determining power fluctuation based on the real-time power includes: determining voltage fluctuation based on the input voltage; The step of determining whether the power fluctuation is greater than a preset power fluctuation includes: determining whether the voltage fluctuation is greater than a first preset voltage fluctuation.

4. The boost charging power monitoring method as described in any one of claims 3, characterized in that, After identifying the maximum available power, the method further includes: By combining the real-time power and the power fluctuation, the power adjustment amount is reduced based on the real-time power to determine the maximum available stable power.

5. The boost converter power monitoring method according to claim 4, characterized in that, Before determining the maximum available stable power, the method further includes: When the maximum available power is detected, timing begins to obtain the duration of the fluctuation; Determining the maximum available stable power includes: The power adjustment amount is determined based on the power fluctuation and the duration of the fluctuation; The difference between the real-time power and the power adjustment amount is the maximum available stable power. Wherein, the maximum available stable power is less than the maximum available power, and the difference between the maximum available stable power and the maximum available power is greater than the power fluctuation; the maximum available power is the output power of the boost module of the battery to be charged when the value of a single power fluctuation is greater than the preset power fluctuation and the number of consecutive occurrences is greater than the first preset number.

6. The boost charging power monitoring method as described in claim 5, characterized in that, After determining the maximum available stable power, the method further includes: Identify the voltage fluctuation corresponding to the maximum available stable power; When the voltage fluctuation corresponding to the maximum available stable power is less than the second preset voltage fluctuation, and the number of consecutive occurrences is greater than the second preset number, the maximum available stable power is determined as the current target charging power.

7. The boost charging power monitoring method as described in claim 5, characterized in that, Determining the power adjustment amount based on the power fluctuation and the duration of the fluctuation includes: Based on the fluctuation duration and the first correlation, the power reduction coefficient corresponding to the current fluctuation duration is determined; wherein, the first correlation is the correlation between the power reduction coefficient and the fluctuation duration; Based on the power reduction factor, the power fluctuation, and the second correlation, the power adjustment amount is determined; wherein, the second correlation is the correlation between the power adjustment amount, the power reduction factor, and the power fluctuation.

8. The boost charging power monitoring method according to claim 7, characterized in that, The real-time power is represented by the input voltage of the boost module; Determining the power adjustment amount based on the power fluctuation and the duration of the fluctuation includes: The voltage adjustment amount is determined based on the voltage fluctuation and the duration of the fluctuation.

9. The boost charging power monitoring method as described in claim 8, characterized in that, The step of determining the voltage adjustment amount based on voltage fluctuations and the duration of the fluctuations includes: Based on the fluctuation duration and the first correlation, the pressure reduction coefficient corresponding to the current fluctuation duration is determined; wherein, the first correlation is the correlation between the pressure reduction coefficient and the fluctuation duration; Based on the voltage drop factor, the voltage fluctuation, and the second correlation, the voltage adjustment amount is determined; wherein, the second correlation is the correlation between the voltage adjustment amount, the voltage drop factor, and the voltage fluctuation.

10. The boost charging power monitoring method as described in claim 6, characterized in that, After determining the current target charging power, the method further includes: Based on the current target charging power, the input voltage and / or current are adjusted in real time.

11. A boost charging power monitoring device, characterized in that, include: The power acquisition module is used to acquire the real-time power during continuous charging. A power fluctuation determination module is used to determine power fluctuations based on the real-time power. The judgment module is used to determine, based on the power fluctuation, whether the value of a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number. The identification module is used to identify the maximum available power when it is determined that a single power fluctuation is greater than a preset power fluctuation and the number of consecutive occurrences is greater than a first preset number; wherein, the power fluctuation includes power oscillation.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that cause a computer to perform the steps of the boost charging power monitoring method as described in any one of claims 1-10.

13. A vehicle, characterized in that, include: Processor and memory; The processor executes the steps of the boost charging power monitoring method as described in any one of claims 1-10 by calling the program or instructions stored in the memory.

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