Control method, control device, medium and vehicle for on-board charging equipment

Abstract

The present disclosure relates to a control method, a control device, a medium and a vehicle for an on-board charging device. The control method includes: determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device; adjusting the output voltage of the buck module to the target output voltage. In this way, the output current of the buck module can be changed by adjusting the output voltage of the buck module. In the case where the instantaneous current required by the vehicle load is large, the output current of the buck module can be increased by adjusting the output voltage of the buck module to meet the short-term large current demand of the vehicle load, without the need for auxiliary power supply from a battery, thereby avoiding shortening the service life of the battery.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicles, and in particular, to a control method, a control device, a medium and a vehicle for an on-vehicle charging device. Background Art

[0002] The buck module in the on-board charging device can provide energy from the vehicle's high-voltage power battery to the vehicle load. However, the instantaneous current required by the vehicle load may exceed the rated maximum current of the buck module of the on-board charging device. At this time, the buck module will be in a constant current working state, and the remaining energy required by the vehicle load is usually provided by the vehicle's battery. If the battery is frequently used to provide energy, the battery life will be shortened. Summary of the invention

[0003] The purpose of the present disclosure is to provide a control method, a control device, a medium and a vehicle for an on-board charging device, which can change the output current of a buck module by adjusting the output voltage of the buck module.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a control method of a vehicle-mounted charging device in a first aspect, the method comprising:

[0005] Determining a target output voltage of the buck module according to a current output current of the buck module of the on-board charging device;

[0006] The output voltage of the step-down module is adjusted to the target output voltage.

[0007] In some embodiments of the present application, determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device includes:

[0008] If the current output current is less than or equal to the preset steady-state output current, the steady-state output voltage is determined as the target output voltage;

[0009] If the current output current is greater than the steady-state output current and less than or equal to a preset maximum limiting current, the target output voltage is determined according to the maximum output power of the step-down module and the current output current.

[0010] In some embodiments of the present application, determining the target output voltage according to the maximum output power of the buck module and the current output current includes:

[0011] The target output voltage is determined according to the quotient of the maximum output power of the step-down module and the current output current.

[0012] In some embodiments of the present application, after adjusting the output voltage of the step-down module to the target output voltage, the control method further includes:

[0013] Monitoring whether the current output voltage of the step-down module reaches a limit voltage, wherein the limit voltage is determined based on the maximum output power of the step-down module and a preset maximum limit current;

[0014] If the current output voltage of the step-down module reaches the limit voltage, and the time duration for reaching the limit voltage is greater than a preset time duration threshold, the output current of the step-down module is adjusted to a preset steady-state output current.

[0015] In some embodiments of the present application, after adjusting the output current of the buck module to a preset steady-state output current, the control method further includes:

[0016] If the current output voltage of the step-down module is lower than a preset protection voltage, the on-board charging device is controlled to stop working, wherein the protection voltage is lower than the limit voltage.

[0017] In some embodiments of the present application, after adjusting the output current of the buck module to a preset steady-state output current, the control method further includes:

[0018] If the current output voltage of the step-down module is not less than the preset protection voltage, and the current output current of the step-down module is not less than the steady-state output current, the output current of the step-down module is adjusted to the steady-state output current again;

[0019] If the current output voltage of the buck module is not less than the preset protection voltage, and the current output current of the buck module is less than the steady-state output current, the step of determining the target output voltage of the buck module according to the current output current of the buck module of the vehicle charging device and the step of adjusting the output voltage of the buck module to the target output voltage are performed again, wherein the protection voltage is less than the limiting voltage.

[0020] A second aspect of the present disclosure provides a control device for a vehicle-mounted charging device, the control device comprising:

[0021] A determination module, configured to determine a target output voltage of the voltage reduction module according to a current output current of the voltage reduction module of the vehicle-mounted charging device;

[0022] The first adjustment module is used to adjust the output voltage of the step-down module to the target output voltage.

[0023] In some embodiments of the present application, the determining module includes:

[0024] A first determination submodule, configured to determine a steady-state output voltage as the target output voltage if the current output current is less than or equal to a preset steady-state output current;

[0025] The second determination submodule is used to determine the target output voltage according to the maximum output power of the step-down module and the current output current if the current output current is greater than the steady-state output current and less than or equal to a preset maximum limiting current.

[0026] In some embodiments of the present application, the second determining submodule includes:

[0027] The third determination submodule is used to determine the target output voltage according to the quotient of the maximum output power of the step-down module and the current output current.

[0028] In some embodiments of the present application, the control device further includes:

[0029] A detection module, used to monitor whether the current output voltage of the step-down module reaches a limit voltage, wherein the limit voltage is determined based on the maximum output power of the step-down module and a preset maximum limit current;

[0030] The second adjustment module is used to adjust the output current of the buck module to a preset steady-state output current if the current output voltage of the buck module reaches the limit voltage and the time duration for reaching the limit voltage is greater than a preset time duration threshold.

[0031] In some embodiments of the present application, the control device further includes:

[0032] The control module is used to control the vehicle-mounted charging device to stop working if the current output voltage of the step-down module is less than a preset protection voltage, wherein the protection voltage is less than the limit voltage.

[0033] In some embodiments of the present application, the second adjustment module is further configured to adjust the output current of the step-down module to the steady-state output current again if the current output voltage of the step-down module is not less than a preset protection voltage and the current output current of the step-down module is not less than the steady-state output current;

[0034] The control device also includes:

[0035] A processing module is used to trigger the determination module again to execute the operation of determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device, and trigger the first adjustment module to execute the operation of adjusting the output voltage of the buck module to the target output voltage if the current output voltage of the buck module is not less than the preset protection voltage and the current output current of the buck module is less than the steady-state output current, wherein the protection voltage is less than the limiting voltage.

[0036] A third aspect of the present disclosure provides a control device for a vehicle-mounted charging device, comprising:

[0037] a memory having a computer program stored thereon;

[0038] A controller, wherein when the computer program is executed by the controller, the steps of the control method provided in the first aspect of the present disclosure are implemented.

[0039] A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the control method provided in the first aspect of the present disclosure.

[0040] A fifth aspect of the present disclosure provides a vehicle, comprising the control device provided by the second aspect of the present disclosure, or the control device provided by the third aspect of the present disclosure.

[0041] Through the above technical solution, the target output voltage of the buck module is determined according to the current output current of the buck module of the on-board charging device, and the output voltage of the buck module is adjusted to the target output voltage. In this way, the output current of the buck module can be changed by adjusting the output voltage of the buck module. When the instantaneous current required by the vehicle load is large, the output current of the buck module can be increased by adjusting the output voltage of the buck module to meet the short-term large current demand of the vehicle load, without the need for auxiliary power supply from the battery, thereby avoiding shortening the service life of the battery.

[0042] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0044] Figure 1 is a flow chart of a control method of a vehicle-mounted charging device provided by an exemplary embodiment of the present disclosure;

[0045] Figure 2is a topological structure diagram of a voltage reduction module of an on-vehicle charging device provided by an exemplary embodiment of the present disclosure;

[0046] Figure 3 is an output state diagram of output current and output voltage of a buck module provided by an exemplary embodiment of the present disclosure;

[0047] Figure 4 is a flow chart of a control method of a vehicle-mounted charging device provided by another exemplary embodiment of the present disclosure;

[0048] Figure 5 is a block diagram of a control device for a vehicle-mounted charging device provided by an exemplary embodiment of the present disclosure;

[0049] Figure 6 2 is a block diagram of a control device for a vehicle-mounted charging device provided by another exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0050] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0051] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0052] Figure 1 FIG. 1 is a flow chart of a control method of a vehicle-mounted charging device provided by an exemplary embodiment of the present disclosure. Figure 1 As shown, the control method may include S101 to S102.

[0053] S101, determining a target output voltage of a buck module according to a current output current of the buck module of an on-board charging device.

[0054] For example, the current output current of the buck module of the on-board charging device can be obtained in real time through a current sensor set at the output end of the buck module, providing data support for adjusting the output voltage of the buck module. The target output voltage of the buck module determined according to the current output current of the buck module of the on-board charging device can make the operating state of the buck module of the on-board charging device adapt to the vehicle load state.

[0055] S102, adjusting the output voltage of the step-down module to a target output voltage.

[0056] For example, when the target output voltage is determined, the output voltage of the buck module can be adjusted to the target output voltage by adjusting the duty cycle. Figure 2As shown in FIG. 1 , the topological structure of the buck module of the on-board charging device includes a high-voltage input capacitor C1, a transformer primary switch Q1, a transformer primary switch Q2, a transformer primary switch Q3, a transformer primary switch Q4, a transformer secondary rectifier tube Q5, a transformer secondary rectifier tube Q6, an active clamp tube Q7, an active clamp tube Q8, an output filter inductor Lr, and an output capacitor C2. The output voltage of the buck module can be adjusted by adjusting the duty cycle of the transformer primary switch Q1, the transformer primary switch Q2, the transformer primary switch Q3, and the transformer primary switch Q4.

[0057] Through the above technical solution, the target output voltage of the buck module is determined according to the current output current of the buck module of the on-board charging device, and the output voltage of the buck module is adjusted to the target output voltage. In this way, the output current of the buck module can be changed by adjusting the output voltage of the buck module. When the instantaneous current required by the vehicle load is large, the output current of the buck module can be increased by adjusting the output voltage of the buck module to meet the short-term large current demand of the vehicle load, without the need for auxiliary power supply from the battery, thereby avoiding shortening the service life of the battery.

[0058] In some embodiments of the present application, determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device may include:

[0059] If the current output current is less than or equal to the preset steady-state output current, the steady-state output voltage is determined as the target output voltage;

[0060] If the current output current is greater than the steady-state output current and less than or equal to the preset maximum limiting current, the target output voltage is determined according to the maximum output power of the buck module and the current output current.

[0061] Exemplarily, the steady-state output current is the output current corresponding to the buck module of the on-board charging device when it is in a stable and efficient optimal working state. The steady-state output current can be preset, for example, it can be set to 150A. If the current output current is less than or equal to the preset steady-state output current, the steady-state output voltage can be determined as the target output voltage, and the buck module can be output in a constant voltage state (such as 150A) by adjusting the duty cycle. Figure 3 The output state corresponding to t0 to t1 is shown in FIG. 1 ), which stably provides the required energy for the vehicle load.

[0062] The maximum limiting current is the maximum current that the buck module of the on-board charging device can withstand to maintain normal operation in a short period of time. The maximum limiting current can be preset, for example, it can be set to 170A. The output voltage and output current of the buck module are determined according to the vehicle load state. If the current output current is greater than the steady-state output current and less than or equal to the preset maximum limiting current, it can be determined that the current required by the vehicle load at the current moment is large, and the buck module needs to output a larger current to meet the needs of the vehicle load. The maximum output power of the buck module is the maximum power that the buck module of the on-board charging device can withstand to maintain normal operation in a short period of time. According to the maximum output power and the current output current of the buck module, the determined target output voltage is the minimum output voltage corresponding to the current output current. The smaller the target output voltage, the larger the corresponding output current. Figure 3 As shown in the output state corresponding to t1 to t2, the output current increases as the output voltage decreases. In this way, when the current required by the vehicle load is large, the output current of the buck module can be effectively increased to meet the short-term large current demand of the vehicle load; no battery auxiliary power supply is required, which can avoid shortening the service life of the battery.

[0063] In some embodiments of the present application, determining the target output voltage according to the maximum output power and the current output current of the buck module may include:

[0064] The target output voltage is determined according to the quotient of the maximum output power of the buck module and the current output current.

[0065] In some embodiments of the present application, after adjusting the output voltage of the buck module to the target output voltage, the control method may further include:

[0066] Monitoring whether the current output voltage of the buck module reaches a limit voltage, wherein the limit voltage is determined based on a maximum output power of the buck module and a preset maximum limit current;

[0067] If the current output voltage of the buck module reaches the limit voltage, and the time duration for reaching the limit voltage is greater than a preset time duration threshold, the output current of the buck module is adjusted to a preset steady-state output current.

[0068] Exemplarily, the current output voltage of the buck module of the on-board charging device can be monitored in real time by a voltage sensor arranged at the output end of the buck module. Among them, the limiting voltage can be determined based on the quotient of the maximum output power of the buck module and the preset maximum limiting current. If the current output voltage of the buck module reaches the limiting voltage, it can be determined that the current output power of the buck module has reached the maximum output power, and the output voltage of the buck module cannot continue to decrease, that is, the output current cannot continue to increase. If the buck module operates in this state for a long time, it may cause damage to the electronic components in the buck module. Therefore, the electronic components in the buck module can be protected by limiting the duration. Therefore, when the time to reach the limiting voltage is greater than the preset duration threshold, the output current of the buck module can be adjusted to the preset steady-state output current to protect the electronic components in the on-board equipment. Figure 3 The time duration between t2 and t3 is the time duration threshold, which can be preset, for example, 5 minutes. If the current output voltage reaches the limit voltage, and the time duration to reach the limit voltage reaches 5 minutes, the output current of the buck module can be adjusted to the preset steady-state output current to avoid damage to the electronic components of the buck module in the on-board charging device.

[0069] In some embodiments of the present application, after adjusting the output current of the buck module to a preset steady-state output current, the control method may further include:

[0070] If the current output voltage of the step-down module is lower than the preset protection voltage, the on-board charging device is controlled to stop working, wherein the protection voltage is lower than the limit voltage.

[0071] Exemplarily, the protection voltage may be preset, for example, may be set to 10V. After the output current of the step-down module is adjusted to a preset steady-state output current, as shown in FIG. Figure 3 As shown in the output state corresponding to t3, if the output current of the buck module maintains the steady-state output current unchanged, the output voltage of the buck module will continue to decrease. If the current output voltage of the buck module is less than the preset protection voltage, it can be determined that the buck module cannot continue to work. At this time, the on-board charging device can enter the fault protection state and stop working to avoid damage to the on-board charging device.

[0072] In some embodiments of the present application, after adjusting the output current of the buck module to a preset steady-state output current, the control method may further include:

[0073] If the current output voltage of the step-down module is not less than the preset protection voltage, and the current output current of the step-down module is not less than the steady-state output current, the output current of the step-down module is adjusted to the steady-state output current again;

[0074] If the current output voltage of the buck module is not less than the preset protection voltage, and the current output current of the buck module is less than the steady-state output current, the steps of determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device and adjusting the output voltage of the buck module to the target output voltage are performed again;

[0075] Among them, the protection voltage is less than the limit voltage.

[0076] Exemplarily, when the current output voltage of the buck module is not less than the preset protection voltage, if the output current of the buck module decreases, the output voltage of the buck module will not continue to decrease. If the current output voltage of the buck module is not less than the preset protection voltage, and the current output current of the buck module is not less than the steady-state output current, it can be determined that the current output current has not decreased compared to the steady-state output current. Although the output voltage of the buck module is not lower than the protection voltage, it will continue to decrease until the output voltage drops to the protection voltage and the on-board charging device stops working. In order to reduce the possibility of the on-board charging device stopping working, the output current of the buck module can be adjusted to the steady-state output current again.

[0077] If the current output voltage of the buck module is not less than the preset protection voltage, and the current output current of the buck module is less than the steady-state output current, it can be determined that after the output current of the buck module was adjusted to the preset steady-state output current last time, the current output current has decreased compared to the steady-state output current, and the output voltage of the buck module will not continue to decrease, and the on-board charging device can continue to work. At this time, the steps of determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device and adjusting the output voltage of the buck module to the target output voltage can be performed again, so that the operating state of the buck module of the on-board charging device is adapted to the vehicle load state.

[0078] Figure 4 is a flow chart of a control method of a vehicle-mounted charging device provided by another exemplary embodiment of the present disclosure. Figure 4 , the implementation process of the control method of the vehicle charging device provided by the present disclosure can be more clearly understood. Figure 4 As shown, the method may include S401 to S409.

[0079] S401, determine whether the current output current of the step-down module is greater than the steady-state output current. If not, execute S402; if yes, execute S403.

[0080] S402, determining the steady-state output voltage as the target output voltage, and adjusting the output voltage of the step-down module to the target output voltage.

[0081] S403, if the current output current is less than the preset maximum limiting current, determine the target output voltage according to the maximum output power of the buck module and the current output current, and adjust the output voltage of the buck module to the target output voltage.

[0082] S404, monitoring whether the current output voltage of the step-down module reaches the limit voltage.

[0083] The limiting voltage is determined based on the maximum output power of the step-down module and a preset maximum limiting current.

[0084] S405, if the current output voltage of the step-down module reaches the limit voltage, and the time duration of reaching the limit voltage is greater than a preset time duration threshold, the output current of the step-down module is adjusted to a preset steady-state output current.

[0085] S406, determining whether the current output voltage of the step-down module is less than the preset protection voltage. If yes, execute S407; if no, execute S408.

[0086] Among them, the protection voltage is less than the limit voltage.

[0087] S407, controlling the vehicle-mounted charging device to stop working.

[0088] S408, determining whether the current output current of the step-down module is less than the steady-state output current. If yes, re-execute S402; if no, execute S409.

[0089] S409, adjusting the output current of the step-down module to a steady-state output current. Then, S406 is executed again.

[0090] In this way, when the instantaneous current required by the vehicle load is large, the output voltage of the buck module can be adjusted to increase the instantaneous output current of the buck module to meet the large current required by the vehicle load. There is no need for auxiliary power supply from the battery, which avoids shortening the service life of the battery and can avoid damaging the electronic components in the vehicle-mounted charging equipment.

[0091] Based on the same inventive concept, the present disclosure also provides a control device for a vehicle-mounted charging device. Figure 5 FIG. 5 is a block diagram of a control device 500 of a vehicle-mounted charging device provided by an exemplary embodiment of the present disclosure. Figure 5 , the control device 500 of the vehicle-mounted charging device may include:

[0092] A determination module 501 is used to determine a target output voltage of the buck module according to a current output current of the buck module of the on-board charging device;

[0093] The first adjustment module 502 is used to adjust the output voltage of the step-down module to the target output voltage.

[0094] Through the above technical solution, the target output voltage of the buck module is determined according to the current output current of the buck module of the on-board charging device, and the output voltage of the buck module is adjusted to the target output voltage. In this way, the output current of the buck module can be changed by adjusting the output voltage of the buck module. When the instantaneous current required by the vehicle load is large, the output current of the buck module can be increased by adjusting the output voltage of the buck module to meet the short-term large current demand of the vehicle load, without the need for auxiliary power supply from the battery, thereby avoiding shortening the service life of the battery.

[0095] In some embodiments of the present application, the determining module 501 includes:

[0096] A first determination submodule, configured to determine a steady-state output voltage as the target output voltage if the current output current is less than or equal to a preset steady-state output current;

[0097] The second determination submodule is used to determine the target output voltage according to the maximum output power of the step-down module and the current output current if the current output current is greater than the steady-state output current and less than or equal to a preset maximum limiting current.

[0098] In some embodiments of the present application, the second determining submodule includes:

[0099] The third determination submodule is used to determine the target output voltage according to the quotient of the maximum output power of the step-down module and the current output current.

[0100] In some embodiments of the present application, the control device 500 further includes:

[0101] A detection module, used to monitor whether the current output voltage of the step-down module reaches a limit voltage, wherein the limit voltage is determined based on the maximum output power of the step-down module and a preset maximum limit current;

[0102] The second adjustment module is used to adjust the output current of the buck module to a preset steady-state output current if the current output voltage of the buck module reaches the limit voltage and the time duration for reaching the limit voltage is greater than a preset time duration threshold.

[0103] In some embodiments of the present application, the control device 500 further includes:

[0104] The control module is used to control the vehicle-mounted charging device to stop working if the current output voltage of the step-down module is less than a preset protection voltage, wherein the protection voltage is less than the limit voltage.

[0105] In some embodiments of the present application, the second adjustment module is further configured to adjust the output current of the step-down module to the steady-state output current again if the current output voltage of the step-down module is not less than a preset protection voltage and the current output current of the step-down module is not less than the steady-state output current;

[0106] The control device 500 further includes:

[0107] A processing module is used to trigger the determination module 501 again to perform the operation of determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device, and trigger the first adjustment module 502 to perform the operation of adjusting the output voltage of the buck module to the target output voltage if the current output voltage of the buck module is not less than the preset protection voltage and the current output current of the buck module is less than the steady-state output current, wherein the protection voltage is less than the limiting voltage.

[0108] Regarding the control device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0109] Figure 6 FIG. 7 is a block diagram of a control device 700 for a vehicle-mounted charging device according to an exemplary embodiment. Figure 6 As shown, the control device 700 of the vehicle charging device may include: a processor 701 and a memory 702. The control device 700 of the vehicle charging device may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0110] The processor 701 is used to control the overall operation of the control device 700 of the vehicle-mounted charging device to complete all or part of the steps in the control method of the vehicle-mounted charging device. The memory 702 is used to store various types of data to support the operation of the control device 700 of the vehicle-mounted charging device. These data may include, for example, instructions for any application or method operated on the control device 700 of the vehicle-mounted charging device, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 702 or sent via the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the control device 700 of the vehicle-mounted charging device and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 705 may include: a Wi-Fi module, a Bluetooth module, an NFC module, and the like.

[0111] In an exemplary embodiment, the control device 700 of the on-board charging device can be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), digital signal processors (Digital Signal Processor, referred to as DSP), digital signal processing devices (Digital Signal Processing Device, referred to as DSPD), programmable logic devices (Programmable Logic Device, referred to as PLD), field programmable gate arrays (Field Programmable Gate Array, referred to as FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned control method of the on-board charging device.

[0112] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the control method of the vehicle-mounted charging device described above are implemented. For example, the computer-readable storage medium may be the memory 702 including the program instructions, and the program instructions may be executed by the processor 701 of the control device 700 of the vehicle-mounted charging device to complete the control method of the vehicle-mounted charging device described above.

[0113] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the control method of the on-board charging device when executed by the programmable device.

[0114] The present disclosure also provides a vehicle, including the control device 500 of the on-board charging device provided by the present disclosure, or the control device 700 of the on-board charging device provided by the present disclosure.

[0115] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0116] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0117] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A control method for a vehicle-mounted charging device, characterized in that: include: Determining a target output voltage of the buck module according to a current output current of the buck module of the on-board charging device; Adjusting the output voltage of the step-down module to the target output voltage; After adjusting the output voltage of the step-down module to the target output voltage, monitoring whether the current output voltage of the step-down module reaches a limit voltage, wherein the limit voltage is determined based on the maximum output power of the step-down module and a preset maximum limit current; If the current output voltage of the step-down module reaches the limit voltage, and the time duration for reaching the limit voltage is greater than a preset time duration threshold, the output current of the step-down module is adjusted to a preset steady-state output current; After adjusting the output current of the step-down module to a preset steady-state output current, the control method further includes: If the current output voltage of the step-down module is not less than the preset protection voltage, and the current output current of the step-down module is not less than the steady-state output current, the output current of the step-down module is adjusted to the steady-state output current again; If the current output voltage of the buck module is not less than the preset protection voltage, and the current output current of the buck module is less than the steady-state output current, the step of determining the target output voltage of the buck module according to the current output current of the buck module of the vehicle charging device and the step of adjusting the output voltage of the buck module to the target output voltage are performed again, wherein the protection voltage is less than the limiting voltage.

2. The control method according to claim 1, characterized in that: The step of determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device includes: If the current output current is less than or equal to the preset steady-state output current, the steady-state output voltage is determined as the target output voltage; If the current output current is greater than the steady-state output current and less than or equal to a preset maximum limiting current, the target output voltage is determined according to the maximum output power of the step-down module and the current output current.

3. The control method according to claim 2, characterized in that: The step of determining the target output voltage according to the maximum output power of the step-down module and the current output current includes: The target output voltage is determined according to the quotient of the maximum output power of the step-down module and the current output current.

4. The control method according to claim 1, characterized in that: After adjusting the output current of the step-down module to a preset steady-state output current, the control method further includes: If the current output voltage of the step-down module is lower than a preset protection voltage, the on-board charging device is controlled to stop working, wherein the protection voltage is lower than the limit voltage.

5. A control device for a vehicle-mounted charging device, characterized in that: include: A determination module, configured to determine a target output voltage of the voltage reduction module according to a current output current of the voltage reduction module of the vehicle-mounted charging device; A first adjustment module, used for adjusting the output voltage of the step-down module to the target output voltage; a detection module, configured to monitor whether the current output voltage of the buck module reaches a limit voltage after adjusting the output voltage of the buck module to the target output voltage, wherein the limit voltage is determined based on the maximum output power of the buck module and a preset maximum limit current; a second adjustment module, configured to adjust the output current of the buck module to a preset steady-state output current if the current output voltage of the buck module reaches the limit voltage and the time duration for reaching the limit voltage is greater than a preset time duration threshold; The second adjustment module is further configured to adjust the output current of the step-down module to the steady-state output current again if the current output voltage of the step-down module is not less than the preset protection voltage and the current output current of the step-down module is not less than the steady-state output current; A processing module is used to trigger the determination module again to execute the operation of determining the target output voltage of the buck module according to the current output current of the buck module of the on-board charging device, and to trigger the first adjustment module to execute the operation of adjusting the output voltage of the buck module to the target output voltage, if the current output voltage of the buck module is not less than the preset protection voltage and the current output current of the buck module is less than the steady-state output current, and trigger the first adjustment module to execute the operation of adjusting the output voltage of the buck module to the target output voltage, wherein the protection voltage is less than the limiting voltage.

6. A control device for a vehicle-mounted charging device, characterized in that: include: a memory having a computer program stored thereon; A controller, wherein when the computer program is executed by the controller, the steps of the control method according to any one of claims 1 to 4 are implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the control method described in any one of claims 1 to 4 are implemented.

8. A vehicle, characterized in that: Comprising the control device as claimed in claim 5, or the control device as claimed in claim 6.

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