Electric vehicle charging management method, system, medium, program product

Abstract

The present invention proposes an electric vehicle charging management method, system, medium, and program product, the method comprising: during the charging process, determining the remaining charging time according to the current account balance; adjusting the charging power according to the remaining charging time, comprising: if it is monitored that the remaining charging time is greater than or equal to a first time threshold, maintaining the current charging power unchanged or adjusting it to full-speed charging at the maximum charging power; if it is monitored that the remaining charging time is less than the first time threshold, lowering the current charging power. The method ensures that the actual charging amount does not exceed the user account balance by gradually lowering the charging power, and can approach the account balance with high accuracy.

Description

Technical Field

[0001] The present invention relates to the field of charging management technology, and in particular to an electric vehicle charging management method, system, medium, and program product. Background Art

[0002] In existing electric vehicle charging systems, the adjustment of charging power often lacks flexibility and precision. The system cannot dynamically adjust the charging power in real time according to the reduction of the account balance, especially at the critical moment when the account balance is about to run out, resulting in the possibility of charging at a higher power when the balance is about to run out, thereby incurring excess charges. In addition, the existing charging power adjustment strategies are often too simple and lack a detailed power regulation mechanism, and cannot control the charging amount with high precision. And because the adjustment of charging power is not flexible and precise enough, users may face the risk of charging interruption or excess charges, affecting the user experience.

[0003] In addition, existing charging systems often rely on cloud platforms to calculate power consumption and charging costs. When the device is off-grid, the cloud platform cannot obtain the charging status of the device in real time and perform cost control, which may cause the device to continue charging and the actual charging amount to exceed the user's account balance. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes an electric vehicle charging management method, system, medium, and program product. The method ensures that the actual charging amount does not exceed the user's account balance by gradually reducing the charging power, and can approach the account balance with high accuracy.

[0005] One aspect of the present invention provides an electric vehicle charging management method, the method comprising:

[0006] During the charging process, the remaining charging time is determined based on the current account balance;

[0007] Adjusting the charging power according to the remaining charging time includes:

[0008] If it is monitored that the remaining charging time is greater than or equal to the first time threshold, the current charging power is maintained unchanged or adjusted to the maximum charging power for full speed charging;

[0009] If it is monitored that the remaining charging time is less than the first time threshold, the current charging power is reduced.

[0010] In one embodiment of the present invention, if it is monitored that the remaining charging time is greater than or equal to a second time threshold, and it is identified that the current account balance is in a sufficient state, the current charging power is maintained unchanged or adjusted to the maximum charging power for full-speed charging, wherein the second time threshold is greater than the first time threshold;

[0011] If it is monitored that the remaining charging time is less than the second time threshold and greater than or equal to the first time threshold, it is identified that the current account balance is insufficient, and a request is made to replenish the current account balance, and the current charging power continues to be maintained unchanged.

[0012] In one embodiment of the present invention, when it is monitored that the remaining charging time is greater than or equal to the second time threshold, if the current account balance has been updated to a balance value corresponding to the full-speed charging state, full-speed charging is adjusted to the maximum charging power; if the current account balance has not been updated to a balance value corresponding to the full-speed charging state, the current charging power is maintained unchanged.

[0013] In one embodiment of the present invention, the method for lowering the current charging power includes:

[0014] If it is monitored that the remaining charging time is less than the third time threshold and the charging power is greater than the target power, the charging current is reduced by a preset delay step; wherein the third time threshold is less than the first time threshold, the third time threshold is determined according to the duration of the response to the adjustment charging power instruction, the target power is set according to the charging amount error, and the delay step is determined when the total delayed charging time takes the minimum value.

[0015] In one embodiment of the present invention, before determining that the remaining charging time is less than the third time threshold and the charging power is greater than the target power, it is determined in advance whether the predicted end charging time is in the next period of the current billing period; if the end charging time is in the next period of the current billing period and the charging duration of the next period is less than the third time threshold, the charging current is adjusted so that the charging duration of the next period is greater than or equal to the third time threshold.

[0016] In one embodiment of the present invention, the method for lowering the current charging power further includes: if it is monitored that the remaining charging time is less than a fourth time threshold, then terminating the charging; wherein the fourth time threshold is less than the third time threshold.

[0017] In one embodiment of the present invention, the remaining charging time is the ratio of the remaining power to the current charging power, and the remaining power is the ratio of the current account balance to the billing unit price for the current time period.

[0018] Another aspect of the present invention further provides an electric vehicle charging management system, which adopts the above-mentioned electric vehicle charging management method, and the system comprises:

[0019] The cloud platform sends the following instructions to start charging to the centralized control end; and during the charging process, sends instructions to update the current account balance to the centralized control end;

[0020] The centralized control end is used to respond to the start charging instruction to control the start charging; and during the charging process, the remaining charging time is determined according to the current account balance, and the charging power is adjusted according to the remaining charging time, specifically including: if it is monitored that the remaining charging time is greater than or equal to the first time threshold, the current charging power is controlled to remain unchanged or adjusted to full-speed charging at the maximum charging power; if it is monitored that the remaining charging time is less than the first time threshold, the current charging power is controlled to be reduced.

[0021] In one embodiment of the present invention, the centralized control end is also used to: if it is monitored that the remaining charging time is greater than or equal to a second time threshold, control to maintain the current charging power unchanged or adjust to full-speed charging with maximum charging power, wherein the second time threshold is greater than the first time threshold; if it is monitored that the remaining charging time is less than the second time threshold and greater than or equal to the first time threshold, control to continue to maintain the current charging power unchanged, and report a request to replenish the current account balance to the cloud platform end.

[0022] In one embodiment of the present invention, the centralized control end is also used to: when it is monitored that the remaining charging time is less than a third time threshold and the charging power is greater than the target power, control the charging current to be reduced by a preset delay step; wherein the third time threshold is less than the second time threshold, the third time threshold is determined according to the duration of the response to the charging power instruction, the target power is set according to the charging amount error, and the delay step is determined when the total delayed charging time takes the minimum value.

[0023] In one embodiment of the present invention, the centralized control terminal is also used to: when monitoring that the remaining charging time is less than the first time threshold, predict the end charging time, and determine whether the end charging time is in the next period of the current billing period; if the end charging time is in the next period of the current billing period, and the charging time of the next period is less than the third time threshold, then control and adjust the charging current so that the charging time of the next period is greater than or equal to the third time threshold.

[0024] In another aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above-mentioned charging management method when executed by a processor.

[0025] Another aspect of the present invention provides a computer program product, including a computer program, which implements the steps of the above-mentioned charging management method when executed by a processor.

[0026] It can be seen from the above scheme that the advantages of the present invention are:

[0027] The electric vehicle charging management method disclosed by the present invention determines the remaining charging time according to the current account balance updated in real time during the charging process, and adjusts the charging power according to the remaining charging time, and divides the remaining charging time into multiple time periods, and matches different power control strategies with different time periods to achieve dynamic reduction of charging power, thereby improving the flexibility and accuracy of power control, ensuring that the charging power is dynamically adjusted to ensure that the actual charging amount does not exceed the user's account balance, and can approach the account balance with higher accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the overall process of an electric vehicle charging management method disclosed in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 Detailed flow diagram of step S2;

[0030] Figure 3 for Figure 2 Detailed flow chart of step S21;

[0031] Figure 4 for Figure 2 Detailed flow diagram of step S22;

[0032] Figure 5 The figure is a schematic diagram of the structure of an electric vehicle charging management system disclosed in one embodiment of the present invention.

[0033] Reference numerals:

[0034] 100: charging management system;

[0035] 110: cloud platform;

[0036] 120: centralized control terminal;

[0037] 130:Edge side charging station. DETAILED DESCRIPTION

[0038] It should be noted that, in this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Without more constraints, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

[0040] Please refer to Figure 1 As shown in Figure 1 The overall flow chart of the electric vehicle charging management method disclosed in one embodiment of the present invention is shown. The electric vehicle charging management method specifically includes the following steps:

[0041] Step S1: During the charging process, determine the remaining charging time based on the current account balance;

[0042] In one embodiment, the current account balance is updated in real time during the charging process, and the remaining charging time is determined based on the current account balance updated in real time. Specifically, the remaining charging time is the ratio of the remaining power to the current charging power, and the remaining power is the ratio of the current account balance to the current time period billing unit price.

[0043] Step S2: adjusting the charging power according to the remaining charging time.

[0044] In this embodiment, the charging power is gradually reduced according to the remaining charging time to ensure that the actual charging amount does not exceed the user's account balance, and can approach the account balance with high accuracy. Figure 2 As shown, Figure 2 A detailed flow chart of step S2 is shown.

[0045] When the charging is started in response to the start charging instruction, the default is to charge at full speed with the maximum charging power. During the charging process, the information such as the charged amount, the current account balance, and the remaining charging time are calculated in real time. The charging power is adjusted by comparing the remaining charging time with the first time threshold.

[0046] Specifically, step S21: by comparing the remaining charging time with the first time threshold, if it is monitored that the remaining charging time is greater than or equal to the first time threshold, the current charging power is maintained unchanged or adjusted to the maximum charging power for full-speed charging.

[0047] Step S22: If it is monitored that the remaining charging time is less than the first time threshold and the current account balance is about to be exhausted, the current charging power is reduced.

[0048] In this embodiment, during the charging process, the remaining charging time is determined based on the current account balance updated in real time, and the charging power is adjusted based on the remaining charging time. This allows dynamic adjustment of the charging power to ensure that the actual charging amount does not exceed the user account balance, while approaching the account balance with a higher degree of accuracy.

[0049] In another embodiment, see Figure 3 As shown, Figure 3 A detailed flow chart of step S21 is shown. In this embodiment, for the case where the remaining charging time is greater than or equal to the first time threshold, further subdivision is performed to improve the flexibility and accuracy of power control in this time period.

[0050] Specifically, a second time threshold is further set, and the second time threshold is greater than the first time threshold. Step S211: If it is monitored that the remaining charging time is greater than the second time threshold, it is identified that the current account balance is in a sufficient state at this time. In this case, the current charging power is maintained unchanged or adjusted to the maximum charging power for full-speed charging. In this step S211, in view of the real-time update of the current account balance during the charging process, if it is monitored that the current account balance has been updated to meet the balance value corresponding to the full-speed charging state, that is, the current account balance has been supplemented to meet the balance value corresponding to the full-speed charging state, then it is adjusted to the maximum charging power for full-speed charging; if the current account balance has not been updated to meet the balance value corresponding to the full-speed charging state, that is, the current account balance has not been updated or has not reached the balance value corresponding to the full-speed charging state after the update, then the current charging power is maintained unchanged. Step S212: If it is monitored that the remaining charging time is less than the second time threshold and greater than or equal to the first time threshold, it is identified that the current account balance is in an insufficient state at this time, then a request is made to supplement the current account balance, and the current charging power is maintained unchanged. During this process, if the request to replenish the current account balance is responded to, and the current account balance is replenished and updated so that the remaining charging time reaches the second time threshold, the control process of step S211 is further performed. In addition, it should be noted that if the request to replenish the current account balance is not responded to in time because the platform account cannot replenish the current account balance due to no larger balance, the current account balance will remain unchanged at this time.

[0051] In this embodiment, during the charging process, the remaining charging time is determined based on the current account balance updated in real time, and the charging power is adjusted based on the remaining charging time. In particular, for the case where the remaining charging time is greater than or equal to the first time threshold, it is further subdivided to improve the flexibility and accuracy of power control within this time period.

[0052] In yet another embodiment, reference Figure 4 As shown in Figure 4 The detailed flow diagram of step S22 is shown. In this embodiment, the situation where the remaining charging time is less than the first time threshold is further subdivided to achieve a gradual reduction in charging power to improve the flexibility and accuracy of power control in this time period.

[0053] Specifically, in this embodiment, when adjusting the charging power, the charging amount error and the total delayed charging time are minimized, which is achieved by adjusting the charging current. In this process, not only the remaining charging time is considered, but also the end charging time is further predicted. Combining the two, a specific power control strategy for this time period is set.

[0054] Specifically, step S221: by further setting a third time threshold, the third time threshold is less than the first time threshold. When it is monitored that the remaining charging time is less than the second time threshold, the end charging time is predicted in advance, and it is determined whether the end charging time is in the next period of the current billing period. At this time, if the end charging time is in the next period of the current billing period, and the charging time of the next period is calculated to be less than the third time threshold, the charging current is adjusted so that the charging time of the next period is greater than or equal to the third time threshold. In this process, the remaining time of the next period is ensured to reach the third time threshold by adjusting the charging current. The third time threshold is used to ensure the "safe time" for the end of charging. Then the following step S222 is further executed, that is, when the remaining charging time is less than the third time threshold and the charging power is greater than the target power, the charging current is lowered by the amplitude of the preset delay step. In practice, the third time threshold can be determined according to the duration of the response to the charging power instruction to ensure the "safe time" for the end of charging. It is specifically determined based on the product of the time length of the response to the charging power instruction and the number of adjustments allowed. For example, the time length of the response to the charging power instruction is set to 4s, and the number of adjustments allowed is set to 3 times. Then the third time threshold can be set to 12s, that is, if the charger fails to respond to the end charging instruction once, there are still two opportunities to send the end charging as a retry.

[0055] Step S222: If it is monitored that the remaining charging time is less than the third time threshold and the charging power is greater than the target power, the charging current is reduced by the amplitude of the preset delay step. The target power can be set according to the charging amount error. For example, the target power is the power corresponding to the charging amount error not exceeding 0.001KWh. In practice, reducing the charging power will inevitably delay the charging time. The total delayed charging time is determined by the product of the delay step and the number of adjustments. In one embodiment, the preset delay step is set when the total delayed charging time takes the minimum value. In one embodiment, the delay step is set to 8s, and the charging current is reduced by the amplitude of the preset delay step, to achieve multiple step-by-step reductions, and each adjustment target is to extend the charging time by the delay step of 8s.

[0056] In addition, it should be noted that if the charging end time is not in the next period of the current billing period or the charging time of the next period is greater than or equal to the third time threshold, step S222 is directly further executed, that is, when the remaining charging time is less than the third time threshold and the charging power is greater than the target power, the charging current is reduced by the preset delay step.

[0057] In addition, in this embodiment, a fourth time threshold is further set, wherein the fourth time threshold is less than the third time threshold. If it is monitored that the remaining charging time is less than the fourth time threshold, that is, the charging balance reaches the lower limit of exhaustion and the charging balance is about to be exhausted, then charging is terminated at this time.

[0058] In this embodiment, if the remaining charging time is greater than or equal to the first time threshold, the above Figure 3 In the embodiment shown, the remaining charging time is determined according to the current account balance updated in real time during the charging process, and the charging power is adjusted according to the remaining charging time. In particular, when the remaining charging time is less than the first time threshold, the remaining charging time and the predicted end charging time are further subdivided to dynamically adjust the charging current and reduce the charging power, thereby improving the flexibility and accuracy of power control in this time period.

[0059] In summary, the electric vehicle charging management method disclosed by the present invention determines the remaining charging time according to the current account balance updated in real time during the charging process, and adjusts the charging power according to the remaining charging time, and divides the remaining charging time into multiple time periods, and matches different power control strategies with different time periods to achieve dynamic reduction of charging power, thereby improving the flexibility and accuracy of power control, ensuring dynamic adjustment of charging power to ensure that the actual charging amount does not exceed the user's account balance, and can approach the account balance with higher accuracy.

[0060] Correspondingly, corresponding to the above-mentioned electric vehicle charging management method, the present invention also provides an electric vehicle charging management system on the other hand, which improves the existing charging system. As mentioned above, the existing charging system often relies on the cloud platform to calculate the power consumption and charging costs. When the device side is off the grid, the cloud platform cannot obtain the charging status of the device side in real time and perform cost control, which may cause the device side to continue charging, and the actual charging amount exceeds the user account balance. In this regard, the present invention improves the existing charging system and adds a centralized control terminal, which communicates with a number of edge-side charging piles. During the charging process, the centralized control terminal calculates the power consumption and charging costs, and directly regulates the charging status of each edge-side charging pile. The original cloud platform communicates with the centralized control terminal, and only sends the account balance to the centralized control terminal when charging is started, and no balance calculation is performed during the subsequent charging process. For details, please refer to Figure 5 As shown, Figure 5 The electric vehicle charging management system 100 at least comprises:

[0061] The cloud platform 110 sends a charging start instruction to the centralized control terminal 120; and during the charging process, sends an update current account balance instruction to the centralized control terminal 120. That is, the cloud platform 110 only sends the current account balance to the centralized control terminal when starting charging, and when receiving a request from the centralized control terminal to supplement the current account balance, sends an update current account balance instruction to the centralized control terminal 120 to supplement the current account balance. During the charging process, the cloud platform no longer performs metering and billing operations, and no longer calculates the balance.

[0062] The centralized control terminal 120 is used to respond to the charging start instruction issued by the cloud platform terminal 110 to control the start of charging; and during the charging process, it performs metering and billing operations, updates the current account balance in real time, and reports a request to replenish the current account balance to the cloud platform terminal 110 when the current account balance is insufficient. And determine the remaining charging time based on the current account balance, and adjust the charging power of the edge side charging pile 130 based on the remaining charging time. Specifically including: if the centralized control terminal monitors that the remaining charging time is greater than or equal to the first time threshold, it controls to maintain the current charging power unchanged or adjusts it to full-speed charging at the maximum charging power; if it monitors that the remaining charging time is less than the first time threshold, it controls to reduce the current charging power.

[0063] In one embodiment, the centralized control end is also used to: if it is monitored that the remaining charging time is greater than or equal to the second time threshold, then control to maintain the current charging power unchanged or adjust to the maximum charging power for full-speed charging, wherein the second time threshold is greater than the first time threshold; if it is monitored that the remaining charging time is less than the second time threshold and greater than or equal to the first time threshold, control to continue to maintain the current charging power unchanged, and report a request to supplement the current account balance to the cloud platform end. At this time, if the response instruction of the cloud platform end is not sent to the centralized control end in time because it is off-grid, or the cloud platform end detects that the account has no larger balance and cannot supplement the current account balance, then the current account balance of the centralized control end will remain unchanged.

[0064] In one embodiment, the centralized control end is also used to: when it is monitored that the remaining charging time is less than a third time threshold and the charging power is greater than the target power, control the charging current to be reduced by a preset delay step; wherein the third time threshold is less than the second time threshold, the third time threshold is determined according to the duration of the response to the charging power instruction, the target power is set according to the charging amount error, and the delay step is determined when the total delayed charging time takes the minimum value.

[0065] In one embodiment, the centralized control end is also used to: when monitoring that the remaining charging time is less than the first time threshold, predict the end charging time, and determine whether the end charging time is in the next period of the current billing period; if the end charging time is in the next period of the current billing period, and the charging time of the next period is less than the third time threshold, then control and adjust the charging current so that the charging time of the next period is greater than or equal to the third time threshold.

[0066] In this embodiment, during the entire charging process, the system monitors the remaining time, charging power and account balance in real time to ensure charging efficiency and user experience. Through this system, the electric vehicle charging process can be carried out efficiently and safely, while ensuring the reasonable use of the user's account balance and the accurate calculation of charging fees.

[0067] In addition, technicians in the relevant field can clearly understand that for the convenience and brevity of description, the specific working process of the charging management system can refer to the corresponding process in the aforementioned charging management method embodiment, and will not be repeated here.

[0068] In addition, the present invention also proposes an electronic device in another embodiment, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the above-mentioned charging management method.

[0069] In another embodiment, the present invention further provides a storage medium for storing a method for executing the above Figure 1-Figure 4 A computer program for any of the charging management methods shown. It should be understood that the storage medium in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus random access memory (DR RAM).

[0070] In addition, the present invention also provides a computer program product in one embodiment, the computer program product includes a computer program, the computer program can be stored in a readable storage medium, and when the computer program is executed by a processor, the computer can perform the above Figure 1-Figure 4 Any of the charging management methods shown.

[0071] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for managing electric vehicle charging, characterized in that: Include: During the charging process, the remaining charging time is determined based on the current account balance; Adjusting the charging power according to the remaining charging time includes: If it is monitored that the remaining charging time is greater than or equal to the first time threshold, the current charging power is maintained unchanged or adjusted to the maximum charging power for full speed charging; If it is monitored that the remaining charging time is less than the first time threshold, the current charging power is reduced.

2. The method according to claim 1, characterized in that If it is monitored that the remaining charging time is greater than or equal to a second time threshold, and it is identified that the current account balance is in a sufficient state, the current charging power is maintained unchanged or adjusted to full-speed charging at the maximum charging power, wherein the second time threshold is greater than the first time threshold; If it is monitored that the remaining charging time is less than the second time threshold and greater than or equal to the first time threshold, it is identified that the current account balance is insufficient, and a request is made to replenish the current account balance, and the current charging power continues to be maintained unchanged.

3. The method according to claim 2, characterized in that When it is detected that the remaining charging time is greater than or equal to the second time threshold, If the current account balance has been updated to the balance value corresponding to the full-speed charging state, adjust the charging to full-speed charging at the maximum charging power; If the current account balance is not updated to the balance value corresponding to the full-speed charging state, the current charging power remains unchanged.

4. The method according to claim 1, characterized in that: The method for lowering the current charging power includes: If it is monitored that the remaining charging time is less than a third time threshold and the charging power is greater than the target power, the charging current is reduced by a predetermined delay step, wherein the third time threshold is less than the first time threshold; Among them: the third time threshold is determined according to the duration of adjusting the charging power instruction response, the target power is set according to the charging amount error, and the delay step is determined when the total delayed charging duration takes the minimum value.

5. The method according to claim 4, characterized in that Before determining that the remaining charging time is less than the third time threshold and the charging power is greater than the target power, pre-determine whether the predicted end charging time is in the next period of the current billing period; If the charging end time is in the next period of the current billing period, and the charging duration of the next period is less than the third time threshold, the charging current is adjusted so that the charging duration of the next period is greater than or equal to the third time threshold.

6. The method according to claim 4 or 5, characterized in that: The method for lowering the current charging power further comprises: If it is monitored that the remaining charging time is less than a fourth time threshold, charging is terminated; wherein the fourth time threshold is less than the third time threshold.

7. The method according to claim 1, characterized in that The remaining charging time is the ratio of the remaining power to the current charging power, and the remaining power is the ratio of the current account balance to the current time period billing unit price.

8. An electric vehicle charging management system, characterized in that: Include: The cloud platform sends the following instructions to start charging to the centralized control end; and during the charging process, sends instructions to update the current account balance to the centralized control end; The centralized control terminal is used to respond to the charging start instruction to control the charging start; and during the charging process, determine the remaining charging time according to the current account balance, and adjust the charging power according to the remaining charging time, including: If it is monitored that the remaining charging time is greater than or equal to the first time threshold, control to maintain the current charging power unchanged or adjust to the maximum charging power and full speed charging; If it is monitored that the remaining charging time is less than the first time threshold, the current charging power is controlled to be reduced.

9. The system according to claim 8, characterized in that The centralized control terminal is further configured to: if it is monitored that the remaining charging time is greater than or equal to a second time threshold, control the current charging power to remain unchanged or adjust the charging power to full speed charging at the maximum charging power, wherein the second time threshold is greater than the first time threshold; If it is monitored that the remaining charging time is less than the second time threshold and greater than or equal to the first time threshold, the control continues to maintain the current charging power unchanged, and reports a request to replenish the current account balance to the cloud platform.

10. The system according to claim 8, characterized in that The centralized control end is further used to: when it is monitored that the remaining charging time is less than a third time threshold and the charging power is greater than the target power, control the charging current to be lowered by a delay of a preset delay step, wherein the third time threshold is less than the second time threshold; Among them: the third time threshold is determined according to the duration of adjusting the charging power instruction response, the target power is set according to the charging amount error, and the delay step is determined when the total delayed charging duration takes the minimum value.

11. The system according to claim 7, characterized in that The centralized control terminal is also used for: When it is monitored that the remaining charging time is less than the first time threshold, predicting the charging end time, and determining whether the charging end time is in the next period of the current billing period; If the charging end time is in the next period of the current billing period, and the charging duration of the next period is less than the third time threshold, the charging current is controlled and adjusted so that the charging duration of the next period is greater than or equal to the third time threshold.

12. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

13. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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