Alternating current charging control method, vehicle-mounted controller, system, automobile, and storage medium

Abstract

The application discloses an alternating current charging control method, a vehicle-mounted controller, a system, a vehicle and a storage medium. The method comprises the following steps: collecting current working condition data corresponding to a current alternating current charging mode; if the current alternating current charging mode is a power conversion charging mode and the current working condition data satisfies a power conversion exit condition, updating the current alternating current charging mode to a non-power conversion charging mode; and if the current alternating current charging mode is the non-power conversion charging mode and the current working condition data satisfies a power conversion start condition, updating the current alternating current charging mode to the power conversion charging mode. According to the current working condition data, the method can realize mutual switching between the power conversion charging mode and the non-power conversion charging mode, thereby improving the alternating current charging efficiency, reducing the power consumption per 100 kilometers, and guaranteeing the normal work of the storage battery without increasing the cost of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of DC-DC converter technology, and more particularly to an AC charging control method, an on-board controller, a system, an automobile, and a storage medium. Background Technology

[0002] The energy consumption per 100 kilometers of a new energy vehicle affects its driving range and is an important indicator of vehicle performance. AC charging efficiency is a significant factor influencing energy consumption per 100 kilometers; improving AC charging efficiency can effectively reduce energy consumption per 100 kilometers for new energy vehicles.

[0003] Currently, during AC charging of new energy vehicles, it is necessary to control the operation of low-voltage accessories. To prevent battery depletion, the DC-DC converter must be kept in power conversion mode throughout the process. During AC charging of new energy vehicles, the power of the low-voltage accessory components is relatively low, typically below 100V. Within this power conversion range, the efficiency of the DC-DC converter will be less than 80%, resulting in low AC charging efficiency. Existing new energy vehicles primarily improve energy conversion efficiency by modifying hardware, thereby increasing the overall vehicle cost. Low-voltage accessories refer to electrical components with low operating voltages. Summary of the Invention

[0004] This invention provides an AC charging control method, an on-board controller, a system, a vehicle, and a storage medium to address the problem of low AC charging efficiency in existing new energy vehicles.

[0005] This invention provides an AC charging control method, comprising:

[0006] Collect current operating condition data corresponding to the current AC charging mode;

[0007] If the current AC charging mode is a power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then update the current AC charging mode to a non-power conversion charging mode.

[0008] If the current AC charging mode is a non-power conversion charging mode, and the current operating condition data meets the power conversion start-up conditions, then the current AC charging mode is updated to a power conversion charging mode.

[0009] Preferably, the current operating condition data includes the current battery level;

[0010] If the current AC charging mode is a power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then updating the current AC charging mode to a non-power conversion charging mode includes:

[0011] If the current AC charging mode is a power conversion charging mode and the current battery level is greater than a first battery level threshold, then the current AC charging mode is updated to a non-power conversion charging mode.

[0012] Preferably, the current operating condition data includes a first duration during which the current switch power is lower than the target power threshold;

[0013] If the current AC charging mode is a power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then updating the current AC charging mode to a non-power conversion charging mode includes:

[0014] If the current AC charging mode is a power conversion charging mode and the first duration is greater than the first duration threshold, then the current AC charging mode is updated to a non-power conversion charging mode.

[0015] Preferably, the current operating condition data includes the current battery level;

[0016] If the current AC charging mode is a non-power conversion charging mode, and the current operating condition data meets the power conversion start-up conditions, then updating the current AC charging mode to a power conversion charging mode includes:

[0017] If the current AC charging mode is a non-power conversion charging mode and the current battery level is less than the second battery level threshold, then the current AC charging mode is updated to a power conversion charging mode.

[0018] Preferably, the current operating condition data includes a second duration during which the current battery voltage is lower than the target voltage threshold;

[0019] If the current AC charging mode is a non-power conversion charging mode, and the current operating condition data meets the power conversion start-up conditions, then updating the current AC charging mode to a power conversion charging mode includes:

[0020] If the current AC charging mode is a non-power conversion charging mode and the second duration is greater than the second duration threshold, then the current AC charging mode is updated to a power conversion charging mode.

[0021] Preferably, before collecting the current operating condition data corresponding to the current AC charging mode, the AC charging control method further includes:

[0022] The vehicle control signal is acquired, and when the vehicle control signal includes an AC charging signal and a high-voltage power-on signal, the current AC charging mode is determined to be a power conversion charging mode.

[0023] This invention provides an on-board controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the aforementioned AC charging control method.

[0024] This invention provides an AC charging control system, including the above-mentioned vehicle controller, a battery management system connected to the vehicle controller, and a DC-DC converter, wherein the battery management system is connected to a battery.

[0025] This invention provides a new energy vehicle, including the aforementioned AC charging control system.

[0026] This invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the AC charging control method described above.

[0027] The aforementioned AC charging control method, on-board controller, system, vehicle, and storage medium, when the current AC charging mode is power conversion charging mode and the current operating data meets the power conversion exit conditions, update the current AC charging mode to non-power conversion charging mode, controlling the DC-DC converter to not operate, thereby improving AC charging efficiency, shortening AC charging time, and reducing energy consumption per 100 kilometers. When the current AC charging mode is non-power conversion charging mode and the current operating data meets the power conversion start conditions, update the current AC charging mode to power conversion charging mode, controlling the DC-DC converter to operate, thereby preventing battery depletion and ensuring normal battery operation. In this example, the switching between power conversion charging mode and non-power conversion charging mode can be realized based on the current operating data, improving AC charging efficiency and reducing energy consumption per 100 kilometers without increasing the overall vehicle cost, while also ensuring normal battery operation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of an AC charging control method according to an embodiment of the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides an AC charging control method applicable to an AC charging control system. The AC charging control system includes an on-board controller, a battery management system connected to the on-board controller, and a DC-DC converter. The battery management system is connected to a battery. The battery management system, connected to the battery installed in the new energy vehicle, collects current operating condition data of the battery and sends this data to the on-board controller. Upon receiving the current operating condition data from the battery management system, the on-board controller controls the DC-DC converter to improve AC charging efficiency. The on-board controller is a controller installed in the new energy vehicle; it can be a vehicle controller or another controller loaded with a computer program implementing the AC charging control method.

[0032] In one embodiment, such as Figure 1 As shown, an AC charging control method is provided. Taking the application of this method in an on-board controller as an example, the AC charging control method includes the following steps:

[0033] S101: Collects current operating condition data corresponding to the current AC charging mode;

[0034] S102: If the current AC charging mode is power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then update the current AC charging mode to non-power conversion charging mode.

[0035] S103: If the current AC charging mode is a non-power conversion charging mode, and the current operating data meets the power conversion start-up conditions, then update the current AC charging mode to power conversion charging mode.

[0036] The current AC charging mode refers to the operating mode of AC charging at the current moment. In this example, the current AC charging mode can be either a power conversion charging mode or a non-power conversion charging mode. A power conversion charging mode refers to the mode in which the DC-DC converter performs power conversion during AC charging. A non-power conversion charging mode refers to the mode in which the DC-DC converter does not perform power conversion during AC charging. Generally, when the DC-DC converter is in power conversion charging mode, its AC charging efficiency is lower; when the DC-DC converter is in non-power conversion charging mode, its AC charging efficiency is higher.

[0037] The current operating condition data refers to the data collected at the current moment, specifically data related to the operation of the battery and DC-DC converter. The power conversion exit condition is a pre-configured condition used to control the exit from the power conversion charging mode. The power conversion start condition is a pre-configured condition used to control the start of the power conversion charging mode.

[0038] As an example, in step S101, the vehicle controller collects current operating condition data in real time under the current AC charging mode, so as to determine whether it is necessary to switch the current AC charging mode based on the current operating condition data. In this example, the current operating condition data can be real-time data related to the battery, or real-time data related to the DC-DC converter.

[0039] As an example, in step S102, when the current AC charging mode is power conversion charging mode, the vehicle controller indicates that the new energy vehicle is currently in AC charging mode, and the DC-DC converter is performing power conversion. At this time, the efficiency of AC charging for the new energy vehicle is low, but it ensures that the battery will not be depleted due to the operation of low-voltage accessories. In this example, when the current AC charging mode is power conversion charging mode, the vehicle controller needs to determine whether the corresponding power conversion exit condition is met based on the real-time collected current operating condition data. If the current operating condition data meets the power conversion exit condition, the current AC charging mode needs to be updated to a non-power conversion charging mode. In this case, the DC-DC converter needs to be controlled not to perform power conversion. If the current operating condition data does not meet the power conversion exit condition, the current AC charging mode can be maintained as power conversion charging mode. In this case, the DC-DC converter needs to be controlled to perform power conversion.

[0040] Understandably, when the current operating data meets the power conversion exit condition, it means that the DC-DC converter will not perform power conversion, and the battery will not be depleted due to the operation of low-voltage accessories. At this time, the current AC charging mode can be switched to non-power conversion charging mode, so that the DC-DC converter will not perform power conversion, thereby improving AC charging efficiency.

[0041] As an example, in step S103, when the current AC charging mode is non-power conversion charging mode, it indicates that the new energy vehicle is currently in AC charging mode, and the DC-DC converter does not perform power conversion. At this time, the AC charging efficiency of the new energy vehicle is high, but the battery may become depleted. In this example, when the current AC charging mode is non-power conversion charging mode, the vehicle controller needs to determine whether the corresponding power conversion start-up conditions are met based on the real-time collected current operating condition data. If the current operating condition data meets the power conversion start-up conditions, the current AC charging mode needs to be updated to power conversion charging mode, and the DC-DC converter needs to be controlled to perform power conversion. If the current operating condition data does not meet the power conversion start-up conditions, the current AC charging mode can be maintained as non-power conversion charging mode, and the DC-DC converter needs to be controlled not to perform power conversion.

[0042] Understandably, if the current operating data meets the power conversion start-up conditions, it means that if the DC-DC converter continues not to perform power conversion, the battery is very likely to be depleted due to the operation of low-voltage accessories. At this time, it is necessary to switch the current AC charging mode to the power conversion charging mode so that the DC-DC converter can perform power conversion to ensure the normal operation of the battery.

[0043] In the AC charging control method provided in this embodiment, when the current AC charging mode is power conversion charging mode and the current operating data meets the power conversion exit condition, the current AC charging mode is updated to a non-power conversion charging mode, and the DC-DC converter is controlled to not work, thereby improving AC charging efficiency, shortening AC charging time, and reducing energy consumption per 100 kilometers. When the current AC charging mode is non-power conversion charging mode and the current operating data meets the power conversion start condition, the current AC charging mode is updated to power conversion charging mode, and the DC-DC converter is controlled to work, thereby avoiding battery depletion and ensuring normal battery operation. In this example, the switching between power conversion charging mode and non-power conversion charging mode can be realized according to the current operating data. Without increasing the overall vehicle cost, this improves AC charging efficiency, reduces energy consumption per 100 kilometers, and ensures normal battery operation.

[0044] In one embodiment, the current operating condition data includes the current battery level;

[0045] Step S102, that is, if the current AC charging mode is power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then update the current AC charging mode to non-power conversion charging mode, including:

[0046] If the current AC charging mode is power conversion charging mode and the current battery level is greater than the first battery level threshold, then update the current AC charging mode to non-power conversion charging mode.

[0047] Here, "current battery level" refers to the battery's current charge level. "First charge threshold" is a pre-set threshold used to assess whether the battery can exit the power conversion charging mode; this first charge threshold can be understood as assessing whether the battery's charge level has reached a relatively high standard.

[0048] As an example, in step S102, when the current AC charging mode is power conversion charging mode, it indicates that the new energy vehicle is currently in AC charging mode, and the DC-DC converter is performing power conversion. At this time, the efficiency of AC charging for the new energy vehicle is low, but it ensures that the battery will not be depleted due to the operation of low-voltage accessories. In this example, when the current AC charging mode is power conversion charging mode, the vehicle controller acquires the real-time collected current battery level and compares it with a pre-set first power threshold to determine whether the current battery level meets the power conversion exit condition. If the current battery level is greater than the first power threshold, it indicates that the current battery level has reached a significant threshold, and the current battery level is deemed to meet the power conversion exit condition. In this case, the current AC charging mode needs to be updated to non-power conversion charging mode, i.e., the DC-DC converter is controlled not to perform power conversion. If the current battery level is not greater than the first power threshold, it indicates that the current battery level has not reached a significant threshold, and the current battery level is deemed not to meet the power conversion exit condition. In this case, the current AC charging mode can be maintained as power conversion charging mode, i.e., the DC-DC converter is controlled to perform power conversion.

[0049] Understandably, when the current battery level is greater than the first power threshold, it means that the battery level has reached a relatively high standard. At this time, even if the DC-DC converter does not perform power conversion, the battery will not be depleted due to the operation of the low-voltage accessories. Therefore, it can be determined that the current battery level meets the power conversion exit condition, and the current AC charging mode is switched to non-power conversion charging mode, so that the DC-DC converter does not perform power conversion, thereby improving AC charging efficiency.

[0050] In one embodiment, the current operating condition data includes a first duration during which the current switch power is below a target power threshold;

[0051] Step S102, that is, if the current AC charging mode is power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then update the current AC charging mode to non-power conversion charging mode, including:

[0052] If the current AC charging mode is power conversion charging mode and the first duration is greater than the first duration threshold, then update the current AC charging mode to non-power conversion charging mode.

[0053] Here, the current switch power refers to the power output of the DC-DC switch at the current moment. The target power threshold is a pre-configured power threshold used to evaluate whether the power conversion charging mode can be exited. This target power threshold can be understood as a power threshold used to evaluate whether the output power of the DC-DC switch reaches a lower standard.

[0054] The first duration refers to the duration during which the current switch power is below the target power threshold. For example, if the current switch power collected from time T1 to time T2 is below the target power threshold, then the first duration is T2-T1. The first duration threshold is a pre-set threshold used to evaluate whether the duration meets a longer standard.

[0055] As an example, in step S102, when the current AC charging mode is power conversion charging mode, the vehicle controller indicates that the new energy vehicle is currently in AC charging mode and the DC-DC converter is performing power conversion. At this time, the efficiency of AC charging for the new energy vehicle is relatively low, but it can ensure that the battery will not be depleted due to the operation of low-voltage accessories. In this example, when the current AC charging mode is power conversion charging mode, the vehicle controller obtains the first duration for which the current converter power is lower than the target power threshold, and compares the first duration with a preset first duration threshold to determine whether the first duration meets the power conversion exit condition. When the first duration exceeds the first duration threshold, it is determined that the DC-DC converter outputs low power for a relatively long period of time, and the first duration meets the power conversion exit condition. At this time, the current AC charging mode needs to be updated to a non-power conversion charging mode to control the DC-DC converter from performing power conversion. When the first duration is not greater than the first duration threshold, it is determined that the DC-DC converter does not output low power for a relatively long period of time, and the first duration does not meet the power conversion exit condition. The current AC charging mode can be maintained as a power conversion charging mode, and the DC-DC converter needs to be controlled to perform power conversion.

[0056] Understandably, when the first duration exceeds the first duration threshold, it is determined that the DC-DC converter outputs low power for a longer period of time. At this time, even if the DC-DC converter does not perform power conversion, the battery will not be depleted due to the operation of the low-voltage accessory. Therefore, it can be determined that the current battery level meets the power conversion exit condition, and then the current AC charging mode is switched to non-power conversion charging mode, so that the DC-DC converter does not perform power conversion, thereby improving AC charging efficiency.

[0057] In one embodiment, the current operating condition data includes the current battery level;

[0058] In step S103, if the current AC charging mode is a non-power conversion charging mode and the current operating data meets the power conversion start-up conditions, then the current AC charging mode is updated to a power conversion charging mode, including:

[0059] If the current AC charging mode is a non-power conversion charging mode and the current battery level is less than the second power threshold, then update the current AC charging mode to power conversion charging mode.

[0060] Here, the current battery level refers to the battery's current charge level. The second charge threshold is a pre-set threshold used to assess whether the power conversion charging mode can be initiated. The first charge threshold can be understood as an assessment of whether the battery charge level has reached a minimum standard.

[0061] As an example, in step S103, when the current AC charging mode is non-power conversion charging mode, it indicates that the new energy vehicle is currently in AC charging mode, and the DC-DC converter does not perform power conversion. At this time, the AC charging efficiency of the new energy vehicle is high, but the battery may become depleted. In this example, when the current AC charging mode is non-power conversion charging mode, the vehicle controller acquires the real-time collected current battery level and compares it with a pre-set second power threshold to determine whether the current battery level meets the power conversion start-up condition. If the current battery level is less than the second power threshold, it indicates that the current battery level has reached the minimum standard, and the current battery level is considered to meet the power conversion start-up condition. At this time, the current AC charging mode needs to be updated to power conversion charging mode, i.e., the DC-DC converter is controlled to perform power conversion. If the current battery level is not less than the second power threshold, it indicates that the current battery level has not reached the minimum standard, and the current battery level is considered to not meet the power conversion start-up condition. At this time, the current AC charging mode can be maintained as non-power conversion charging mode, i.e., the DC-DC converter is controlled not to perform power conversion.

[0062] Understandably, when the current battery level is less than the second power threshold, it means that the battery level has reached a relatively low level. At this time, if the DC-DC converter does not perform power conversion, the battery may be depleted due to the operation of low-voltage accessories. Therefore, it can be determined that the current battery level meets the power conversion start-up conditions, and the current AC charging mode is switched to the power conversion charging mode, so that the DC-DC converter can perform power conversion to ensure the normal operation of the battery.

[0063] In one embodiment, the current operating condition data includes a second duration during which the current battery voltage is below a target voltage threshold;

[0064] In step S103, if the current AC charging mode is a non-power conversion charging mode and the current operating data meets the power conversion start-up conditions, then the current AC charging mode is updated to a power conversion charging mode, including:

[0065] If the current AC charging mode is a non-power conversion charging mode and the second duration is greater than the second duration threshold, then update the current AC charging mode to a power conversion charging mode.

[0066] Here, the current battery voltage refers to the battery voltage at the current moment. The target voltage threshold is a pre-configured voltage threshold used to evaluate whether to initiate the power conversion charging mode. This target voltage threshold can be understood as a voltage threshold used to evaluate whether the battery voltage has reached a lower standard.

[0067] The second duration is the duration during which the current battery voltage is below the target voltage threshold. For example, if all current battery voltages collected between time T3 and T4 are below the target voltage threshold, then the second duration is T4-T3. The second duration threshold is a pre-set threshold used to evaluate whether the duration meets a longer standard.

[0068] As an example, in step S103, when the current AC charging mode is non-power conversion charging mode, it indicates that the new energy vehicle is currently in AC charging mode and the DC-DC converter is not performing power conversion. At this time, the new energy vehicle's AC charging efficiency is high, but the battery may become depleted. In this example, when the current AC charging mode is non-power conversion charging mode, the vehicle controller acquires the second duration for which the current battery voltage is lower than the target voltage threshold, and compares this second duration with a pre-set second duration threshold to determine whether the second duration meets the power conversion start-up conditions. When the second duration exceeds the second duration threshold, it is determined that the battery outputs a higher voltage for a longer period of time, and the second duration meets the power conversion start-up condition. In this case, the current AC charging mode needs to be updated to the power conversion charging mode, that is, the DC-DC converter is controlled to perform power conversion. When the second duration is not greater than the second duration threshold, it is determined that the battery does not output a higher voltage for a longer period of time, and the second duration does not meet the power conversion start-up condition. In this case, the current AC charging mode can be maintained as the non-power conversion charging mode, that is, the DC-DC converter is controlled not to perform power conversion.

[0069] Understandably, when the second duration exceeds the second duration threshold, it indicates that the battery is outputting a higher voltage for a longer period of time. At this time, if the DC-DC converter does not perform power conversion, the battery may be depleted due to the operation of the low-voltage accessory. Therefore, it can be determined that the second duration meets the power conversion start-up condition, and the current AC charging mode is switched to the power conversion charging mode, so that the DC-DC converter performs power conversion to ensure the normal operation of the battery.

[0070] In one embodiment, before step S101, that is, before collecting the current operating condition data corresponding to the current AC charging mode, the AC charging control method further includes:

[0071] The vehicle control signal is acquired, and when the vehicle control signal includes AC charging signal and high voltage power-on signal, the current AC charging mode is determined to be power conversion charging mode.

[0072] Among these, vehicle control signals refer to the control signals received by the on-board controller at the current moment. AC charging signals are signals that the on-board controller recognizes an AC charging demand. High-voltage power-on signals are signals that the vehicle is powered on.

[0073] As an example, the vehicle controller can acquire vehicle control signals. When the vehicle control signals include AC charging signals and high-voltage power-on signals, it determines that there is an AC charging demand and the new energy vehicle is performing a high-voltage power-on operation. At this time, it is necessary to directly determine that its current AC charging mode is a power conversion charging mode so that the vehicle enters the AC charging state and the DC-DC converter performs power conversion. This can ensure that when the new energy vehicle recognizes an AC charging demand and the system is powered on, while ensuring the basic function of AC charging, the DC-DC converter needs to be controlled to perform power conversion to avoid the low-voltage accessories from working during AC charging and causing the battery to deplete, thereby ensuring the normal operation of the battery.

[0074] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0075] In one embodiment, an on-board controller is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the AC charging control method described in the above embodiment, for example... Figure 1 S101-S103 are shown below. To avoid repetition, they will not be described again here.

[0076] In one embodiment, an AC charging control system is provided, including an on-board controller as described in the above embodiments, a battery management system connected to the on-board controller, and a DC-DC converter. The battery management system is connected to a battery. The on-board controller can execute the AC charging control method described in the above embodiments, for example... Figure 1 S101-S103 are shown below. To avoid repetition, they will not be described again here.

[0077] In one embodiment, a new energy vehicle is provided, including the AC charging control system described above. This AC charging control system can execute the AC charging control method described above, for example... Figure 1 S101-S103 are shown below. To avoid repetition, they will not be described again here.

[0078] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When executed by a processor, the computer program implements the AC charging control method described in the above embodiment, for example... Figure 1 S101-S103 are shown below. To avoid repetition, they will not be described again here.

[0079] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0080] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0081] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An AC charging control method, characterized in that, include: Collect current operating condition data corresponding to the current AC charging mode; If the current AC charging mode is a power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then update the current AC charging mode to a non-power conversion charging mode. If the current AC charging mode is a non-power conversion charging mode, and the current operating condition data meets the power conversion start-up conditions, then update the current AC charging mode to a power conversion charging mode. The current operating condition data includes the first duration during which the current switch power is lower than the target power threshold. If the current AC charging mode is a power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then updating the current AC charging mode to a non-power conversion charging mode includes: If the current AC charging mode is a power conversion charging mode and the first duration is greater than the first duration threshold, then the current AC charging mode is updated to a non-power conversion charging mode.

2. The AC charging control method as described in claim 1, characterized in that, The current operating condition data includes the current battery level; If the current AC charging mode is a power conversion charging mode, and the current operating condition data meets the power conversion exit condition, then updating the current AC charging mode to a non-power conversion charging mode includes: If the current AC charging mode is a power conversion charging mode and the current battery level is greater than a first battery level threshold, then the current AC charging mode is updated to a non-power conversion charging mode.

3. The AC charging control method as described in claim 1, characterized in that, The current operating condition data includes the current battery level; If the current AC charging mode is a non-power conversion charging mode, and the current operating condition data meets the power conversion start-up conditions, then updating the current AC charging mode to a power conversion charging mode includes: If the current AC charging mode is a non-power conversion charging mode and the current battery level is less than the second battery level threshold, then the current AC charging mode is updated to a power conversion charging mode.

4. The AC charging control method as described in claim 1, characterized in that, The current operating condition data includes a second duration during which the current battery voltage is lower than the target voltage threshold. If the current AC charging mode is a non-power conversion charging mode, and the current operating condition data meets the power conversion start-up conditions, then updating the current AC charging mode to a power conversion charging mode includes: If the current AC charging mode is a non-power conversion charging mode and the second duration is greater than the second duration threshold, then the current AC charging mode is updated to a power conversion charging mode.

5. The AC charging control method as described in claim 1, characterized in that, Before collecting the current operating condition data corresponding to the current AC charging mode, the AC charging control method further includes: The vehicle control signal is acquired, and when the vehicle control signal includes an AC charging signal and a high-voltage power-on signal, the current AC charging mode is determined to be a power conversion charging mode.

6. An on-board controller, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the AC charging control method as described in any one of claims 1 to 5.

7. An AC charging control system, characterized in that, It includes the vehicle controller as described in claim 6, a battery management system connected to the vehicle controller, and a DC-DC converter, wherein the battery management system is connected to a battery.

8. A new energy vehicle, characterized in that, Includes the AC charging control system as described in claim 7.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the AC charging control method as described in any one of claims 1 to 5.

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