Control methods, control devices and electronic devices for auxiliary power supply of charger

Abstract

This invention discloses a control method, control device, and electronic device for auxiliary power supply of a charger. The method includes: acquiring the input voltage of a low-voltage power supply circuit, which provides low-voltage DC power to the charger; comparing the input voltage with a preset voltage range to obtain a comparison result; and generating a control command set based on the comparison result. The control command set controls the switching states of a short-time power supply branch, the switching states of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element and is used to replace the low-voltage power supply circuit to provide low-voltage DC power to the charger for a preset time period. The auxiliary power supply branch uses the current in the high-voltage charging circuit of the charger to power the charger. This invention solves the technical problem of frequent abnormal interruptions in vehicle AC charging caused by the charger's inability to provide auxiliary power.

Description

Technical Field

[0001] This invention relates to the field of charger control technology, and more specifically, to a control method, control device, and electronic device for auxiliary power supply of a charger. Background Technology

[0002] The promotion of new energy vehicles aligns with national policies and industry development trends. With the advancement of new energy vehicle technology, AC charging has become an indispensable charging method due to the convenience of AC charging equipment. The on-board charger, as a core component for AC / DC conversion in new energy vehicles, bears the primary responsibility of charging the vehicle's high-voltage battery. When the vehicle experiences an abnormal low-voltage power supply to the on-board charger, the charger cannot establish normal communication with the vehicle, and its internal drive control voltage will also become abnormal. This can lead to the on-board charger entering an abnormal or even faulty state, causing an abnormal interruption of AC charging for the entire vehicle.

[0003] The current industry standard solution is that the low-voltage power supply for the on-board charger is provided by the vehicle itself, and there is no redundant power supply solution, which often results in abnormal interruptions in the AC charging of the vehicle.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a control method, control device, and electronic device for auxiliary power supply of a charger, in order to at least solve the technical problem that abnormal interruptions in AC charging of the vehicle are prone to occur due to the inability of the charger to provide auxiliary power supply.

[0006] According to one aspect of the present invention, a control method for auxiliary power supply of a charger is provided, comprising: acquiring the input voltage of a low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC power to the charger; comparing the input voltage with a preset voltage range to obtain a comparison result; generating a control instruction set based on the comparison result, the control instruction set being used to control the switching state of a short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of a power conversion module, wherein the short-time power supply branch is provided with an energy storage element, the short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC power to the charger for a preset time period, and the auxiliary power supply branch is used to power the charger using the current in the high-voltage charging circuit of the charger.

[0007] Optionally, generating a control instruction set based on the comparison result includes: when the comparison result indicates that the input voltage is outside the preset voltage range, generating a first control instruction in the control instruction set, the first control instruction being used to control the switching closure of the short-time power supply branch and the switching closure of the auxiliary power supply branch; acquiring the status information of the high-voltage charging circuit, wherein the status information includes: AC terminal status abnormality, DC terminal status abnormality; generating one of a second control instruction in the control instruction set and a third control instruction in the control instruction set based on the status information, wherein the second control instruction is used to control the power conversion module to execute DC-to-AC mode, and the third control instruction is used to control the power conversion module to execute AC-to-DC mode.

[0008] Optionally, generating one of the second control instruction and the third control instruction in the control instruction set based on the status information includes: when the status information indicates that the AC terminal status is abnormal; receiving a reverse inverter enable signal and generating the second control instruction based on the reverse inverter enable signal.

[0009] Optionally, generating one of the second control instruction and the third control instruction in the control instruction set based on the status information further includes: generating the third control instruction when the status information indicates that the DC terminal status is abnormal.

[0010] Optionally, the short-time power supply branch is electrically connected to the low-voltage power supply circuit. The short-time power supply branch includes a first branch with a first energy storage element and a second branch with a second energy storage element. The first branch and the second branch are connected in parallel. Based on the comparison result, a control instruction set is generated. The method further includes: when the comparison result indicates that the input voltage is within the preset voltage range, generating a fourth control instruction in the control instruction set. The fourth control instruction is used to control the switch of the first branch to close until the voltage of the first energy storage element is equal to the input voltage.

[0011] Optionally, generating a control instruction set based on the comparison result further includes: generating a fifth control instruction in the control instruction set when the comparison result indicates that the input voltage is outside the preset voltage range, the fifth control instruction being used to control the closing of the switch of the second branch, wherein the second energy storage element has a pre-stored charger power supply voltage.

[0012] According to another aspect of the present invention, a control device for auxiliary power supply of a charger is also provided, comprising: a data acquisition module for acquiring the input voltage of a low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC power to the charger; a comparison module for comparing the input voltage with a preset voltage range to obtain a comparison result; and a generation module for generating a control instruction set based on the comparison result, wherein the control instruction set is used to control the switching state of a short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module, wherein an energy storage element is provided on the short-time power supply branch, the short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC power to the charger within a preset time period, and the auxiliary power supply branch is used to power the charger using the current in the high-voltage charging circuit of the charger.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to execute the above-described method at runtime.

[0014] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program is configured to execute the above-described method at runtime.

[0015] According to another aspect of the present invention, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the above-described method through the computer program.

[0016] In this embodiment of the invention, the input voltage of the low-voltage power supply circuit is compared with a preset voltage range to obtain the comparison result. A control instruction set is generated based on the comparison result, which achieves the purpose of adaptively adjusting the state of the short-term power supply branch switch and the auxiliary power supply branch switch according to different input voltage conditions. This achieves the technical effect of ensuring the low-voltage DC supply of the charger even when the low-voltage power supply circuit is abnormal, thereby solving the technical problem of abnormal interruption of AC charging of the whole vehicle caused by the charger's inability to provide auxiliary power. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a hardware structure block diagram of a computer terminal for a charger auxiliary power supply control method according to an optional embodiment of the present invention;

[0019] Figure 2 This is a flowchart of a control method for auxiliary power supply of a charger according to an optional embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a charger auxiliary power supply device according to an optional embodiment of the present invention, which applies a control method for charger auxiliary power supply.

[0021] Figure 4 This is a schematic diagram of a charger auxiliary power supply device according to an optional embodiment of the present invention, which applies a control method for charger auxiliary power supply.

[0022] Figure 5 This is a flowchart of a control method for auxiliary power supply of a charger according to an optional embodiment of the present invention;

[0023] Figure 6 This is a structural block diagram of a control device for auxiliary power supply of a charger according to an optional embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] According to one embodiment of the present invention, an embodiment of a control method for auxiliary power supply of a charger is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] This method embodiment can be executed in an electronic device or similar computing device that includes memory and a processor within a vehicle. Taking an electronic device running in a vehicle as an example, such as... Figure 1 As shown, the vehicle's electronic devices may include one or more processors 102 (processors may include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), digital signal processing (DSP) chips, microprocessors (MCUs), programmable logic devices (FPGAs), neural network processors (NPUs), tensor processors (TPUs), artificial intelligence (AI) type processors, etc.) and a memory 104 for storing data. Optionally, the vehicle's electronic devices may also include a transmission device 106 for communication functions, an input / output device 108, and a display device 110. Those skilled in the art will understand that... Figure 1 The structures shown are for illustrative purposes only and do not limit the structure of the electronic devices in the vehicle described above. For example, the electronic devices in a vehicle may include more or fewer components than those described above, or have a different configuration than those described above.

[0028] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the charger auxiliary power supply control method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby realizing the aforementioned charger auxiliary power supply control method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0029] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0030] Display device 110 may be, for example, a touchscreen liquid crystal display (LCD) and a touch display (also referred to as a "touchscreen" or "touch display"). The LCD allows a user to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows the user to interact with the GUI via finger contact and / or gestures on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, a call interface, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0031] This embodiment provides a control method for charger-assisted power supply of electronic devices operating in the aforementioned vehicle. Figure 2 This is a flowchart of a control method for auxiliary power supply of a charger according to one embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0032] Step S20: Collect the input voltage of the low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC to the charger;

[0033] Step S30: Compare the input voltage with a preset voltage range to obtain the comparison result;

[0034] Step S40: Generate a control instruction set based on the comparison result. The control instruction set is used to control the switching state of the short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element. The short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC to the charger within a preset time period. The auxiliary power supply branch is used to use the current in the high-voltage charging circuit of the charger to power the charger.

[0035] Through the above steps, by comparing the input voltage of the low-voltage power supply circuit with a preset voltage range and obtaining the comparison result, and generating a control command set based on the comparison result, the goal of adaptively adjusting the control state of the short-term power supply branch switch and the auxiliary power supply branch switch according to different input voltage conditions is achieved. This realizes the technical effect of ensuring the low-voltage DC supply of the charger even when the low-voltage power supply circuit is abnormal, and thus solves the technical problem of abnormal interruption of vehicle AC charging caused by the charger's inability to provide auxiliary power.

[0036] The technical solution of this embodiment provides a low-voltage power supply redundancy design scheme for on-board chargers and a vehicle power supply control method. When the low-voltage power supply voltage of the vehicle is abnormal, it can quickly switch to the low-voltage redundant power supply circuit (including auxiliary power supply circuit and short-time power supply branch). While providing low-voltage power supply for the on-board charger itself, it can also provide part of the low-voltage power supply for the vehicle, thereby solving the problem of AC charging interruption of the vehicle due to abnormal low-voltage power supply.

[0037] like Figure 3 The diagram shows a schematic of a charger auxiliary power supply device according to an optional embodiment of the present invention, which utilizes a charger auxiliary power supply control method. The charger auxiliary power supply device includes: a power conversion module, a control drive module, a communication module, an auxiliary power supply module, a power conversion module, and a voltage detection module. The power conversion module is used for power transmission between AC and DC, capable of converting AC to DC and vice versa; its specific operating mode is determined by the control drive module. The control drive module receives instructions from the communication module to determine the specific operating mode of the power conversion module. The communication module receives communication instructions from the vehicle and simultaneously receives low-voltage power through the voltage monitoring module and the power conversion module. The auxiliary power supply module converts AC to 12V low-voltage DC.

[0038] Optionally, the input terminal of the auxiliary power supply module is connected in parallel with the high-voltage charging circuit. The auxiliary power supply module has two input modes: it can be connected to high-voltage current from the AC terminal of the high-voltage charging circuit, or, in the event of an AC terminal abnormality, it can be connected to AC power converted from DC power by the power conversion module. The output terminal of the auxiliary power supply module is connected in parallel with the vehicle's low-voltage power supply circuit. The output terminal of the auxiliary power supply module can also be connected to other low-voltage loads of the vehicle.

[0039] like Figure 4 The diagram shows the internal circuit structure of the power conversion module. Branch 1 provides constant power to the on-board charger's IG (key ignition switch line), and branch 2 is the GND line. Branches 1 and 2 form a low-voltage power supply circuit. Branch 3 includes switch S1 and capacitor C1, and branch 4 includes switch S2 and capacitor C2. One of capacitors C1 and C2 is pre-charged, while the other is not. Branches 3 and 4 are both short-time power supply branches. Their function is to provide low-voltage DC to the charger in case of an anomaly in the low-voltage power supply circuit (such as undervoltage). However, because the energy storage element in the short-time power supply branch has limited capacity, it can only provide power for a short period. For long-term power supply, the auxiliary power supply circuit must be used. It should be noted that the preset operating time of the short-time power supply branch must be longer than the start-up time of the auxiliary power supply circuit.

[0040] In an optional embodiment, to save on the cost of the charging auxiliary device, only one energy storage element may be installed inside the power conversion module.

[0041] In an optional embodiment, capacitors C1 and C2 are the first energy storage element and the second energy storage element, respectively, but the form of the first energy storage element and the second energy storage element is not limited to capacitor elements or inductor elements.

[0042] Optionally, a control instruction set is generated based on the comparison result, including: generating a first control instruction in the control instruction set when the comparison result indicates that the input voltage is outside a preset voltage range; the first control instruction is used to control the closing of the switch of the short-term power supply branch and the closing of the switch of the auxiliary power supply branch; acquiring the status information of the high-voltage charging circuit, wherein the status information includes: AC terminal status abnormality and DC terminal status abnormality; generating one of a second control instruction in the control instruction set and a third control instruction in the control instruction set based on the status information, wherein the second control instruction is used to control the power conversion module to execute DC-to-AC mode, and the third control instruction is used to control the power conversion module to execute AC-to-DC mode.

[0043] In other words, when the input voltage is less than the preset minimum or greater than the preset maximum, the short-time power supply branch and the auxiliary power supply branch are closed first, allowing the short-time power supply branch to act as a substitute power source. Then, the auxiliary power supply branch provides long-term power. Further, it checks for abnormalities at the DC or AC end of the high-voltage charging circuit. If the AC end is normal, the input current of the auxiliary power supply branch can directly come from the AC end. If the AC end is abnormal, the power conversion module needs to be controlled to execute DC-to-AC conversion so that the input current of the auxiliary power supply circuit comes from the AC power converted from DC.

[0044] Optionally, generating one of the second control instruction and the third control instruction in the control instruction set based on the status information includes: when the status information indicates an abnormal AC terminal status; receiving a reverse inverter enable signal and generating the second control instruction based on the reverse inverter enable signal.

[0045] In other words, in the event of an AC terminal malfunction, the short-term power supply branch is used to function as the charger. At this time, the on-board charger is ready, the vehicle is connected to high voltage, receives the reverse inverter enable signal, and begins to output AC power in reverse to the auxiliary power supply module. When the auxiliary power supply module starts working, the reverse inverter enable of the on-board charger is stopped.

[0046] Optionally, generating one of the second control instruction and the third control instruction in the control instruction set based on the status information may further include generating the third control instruction when the status information indicates an abnormal DC terminal status.

[0047] Optionally, the short-time power supply branch is electrically connected to the low-voltage power supply circuit. The short-time power supply branch includes a first branch with a first energy storage element and a second branch with a second energy storage element. The first branch and the second branch are connected in parallel. Based on the comparison result, a control instruction set is generated. The method further includes: if the comparison result shows that the input voltage is within a preset voltage range, a fourth control instruction is generated in the control instruction set. The fourth control instruction is used to control the switch of the first branch to close until the voltage of the first energy storage element is equal to the input voltage.

[0048] like Figure 4 As shown, S1 and C1 are installed on the first branch, and S2 and C2 are installed on the second branch. When the input voltage is within a preset voltage range (i.e., the low-voltage power supply circuit is operating normally), the energy storage element C1 is charged by closing S1. When the voltage of C1 reaches the same as the input voltage, S1 is opened, and C1 is fully charged. The input voltage is monitored in real time; if the input voltage is outside the preset voltage range, closing S1 again allows for external discharge.

[0049] Optionally, generating a control instruction set based on the comparison result further includes: generating a fifth control instruction in the control instruction set when the comparison result indicates that the input voltage is outside a preset voltage range. The fifth control instruction is used to control the closing of the switch of the second branch, wherein the second energy storage element has a pre-stored charger power supply voltage.

[0050] In other words, the second branch (i.e. Figure 4 The branch containing S2 and C2 is used to supply power for a preset period of time when the input voltage is detected to be outside the preset voltage range at the beginning.

[0051] In an optional embodiment, when the low-voltage power supply circuit is working normally, that is, in the initial stage of AC charging, S1 and S2 are in the off state, C1 is not pre-charged, and C2 is pre-charged and can provide a continuous 12V regulated power supply for a short period of time.

[0052] The low-voltage power supply redundancy control method for on-board chargers involves detecting the supplied voltage using a voltage detection module to determine whether switching from the vehicle's main power supply to auxiliary power supply is necessary during AC charging. The method includes:

[0053] Scenario 1: When the vehicle's low-voltage power supply is within the normal range, S1 is engaged, charging capacitor C1. When the voltage of C1 exceeds the set value, S1 is disengaged, and the on-board charger is ready, supplying high voltage to the vehicle. The on-board charger begins normal operation upon receiving an enable command (which signals the start of high-voltage charging / discharging). During operation, the voltage detection module continuously monitors the vehicle's low-voltage power supply for abnormalities. If an abnormality is detected, S1 is engaged, and the on-board charger's low-voltage power supply is switched to C1, continuing until the auxiliary power supply module begins operation.

[0054] The second scenario: When the low-voltage power supply of the whole vehicle is detected to be within the abnormal range from the beginning, the power conversion module S2 is activated. At this time, the low-voltage power supply of the on-board charger is switched to C2, and the whole vehicle is connected to high voltage. The on-board charger receives the reverse inverter enable signal and begins to output AC power in reverse to the auxiliary power supply module. After the auxiliary power supply module starts working, it stops the reverse inverter enable of the on-board charger and sends a positive enable signal. After that, the on-board charger begins to output in the positive direction.

[0055] Optionally, if the on-board charger does not receive an enable signal (which is a high-voltage charging / discharging start command) for a continuous time T ≥ 5 min, the vehicle will be de-energized and AC charging will end.

[0056] By adopting the technical solution of this application, different switches can be controlled and capacitors can be charged and discharged according to different low-voltage power supply states. The auxiliary power supply module serves as a backup power source, which can supply power to both the on-board charger and the entire vehicle. When the vehicle power supply is normal, charging C1 solves the power supply problem before the auxiliary power supply module is turned on when a power supply abnormality occurs. When the vehicle power supply is abnormal, discharging C2 controls the on-board charger to enter the inverter state, thus solving the energy source problem of the auxiliary power supply module and the power supply problem before the auxiliary power supply module is turned on.

[0057] Figure 6 This is a structural block diagram of a control device for auxiliary power supply of a charger according to one embodiment of the present invention, such as... Figure 6 As shown, the device includes:

[0058] The acquisition module 51 is used to acquire the input voltage of the low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC to the charger;

[0059] Comparison module 52 is used to compare the input voltage with a preset voltage range to obtain a comparison result;

[0060] The generation module 53 is used to generate a control instruction set based on the comparison result. The control instruction set is used to control the switching state of the short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element. The short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC to the charger within a preset time period. The auxiliary power supply branch is used to use the current in the high-voltage charging circuit of the charger to power the charger.

[0061] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0062] Embodiments of the present invention also provide a storage medium storing a computer program, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.

[0063] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0064] Step S1: Acquire the input voltage of the low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC to the charger;

[0065] Step S2: Compare the input voltage with a preset voltage range to obtain the comparison result;

[0066] Step S3: Generate a control instruction set based on the comparison results. The control instruction set is used to control the switching state of the short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element. The short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC to the charger within a preset time period. The auxiliary power supply branch is used to use the current in the high-voltage charging circuit of the charger to power the charger.

[0067] Embodiments of the present invention also provide a processor configured to run a computer program to perform the steps in any of the above method embodiments.

[0068] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0069] Step S1: Acquire the input voltage of the low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC to the charger;

[0070] Step S2: Compare the input voltage with a preset voltage range to obtain the comparison result;

[0071] Step S3: Generate a control instruction set based on the comparison results. The control instruction set is used to control the switching state of the short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element. The short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC to the charger within a preset time period. The auxiliary power supply branch is used to use the current in the high-voltage charging circuit of the charger to power the charger.

[0072] Embodiments of the present invention also provide an electronic device, including a memory and a processor, characterized in that the memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0073] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0074] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0075] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0076] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0077] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0078] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0079] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0080] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for auxiliary power supply of a charger, characterized in that, include: The input voltage of the low-voltage power supply circuit is collected, wherein the low-voltage power supply circuit is used to provide low-voltage DC to the charger; The input voltage is compared with a preset voltage range to obtain a comparison result; Based on the comparison results, a control instruction set is generated. The control instruction set is used to control the switching state of the short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element. The short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC power to the charger within a preset time period. The auxiliary power supply branch is used to use the current in the high-voltage charging circuit of the charger to power the charger. The short-time power supply branch is electrically connected to the low-voltage power supply circuit. The short-time power supply branch includes a first branch equipped with a first energy storage element and a second branch equipped with a second energy storage element. The first branch and the second branch are connected in parallel. A control command set is generated based on the comparison result, and the system further includes: If the comparison result indicates that the input voltage is within the preset voltage range, a fourth control instruction is generated in the control instruction set. The fourth control instruction is used to control the switch of the first branch to close until the voltage of the first energy storage element is equal to the input voltage. The input voltage is continuously monitored in real time. If the input voltage is outside the preset voltage range, the switch of the first branch is controlled to close again to achieve external discharge. If the comparison result indicates that the input voltage is outside the preset voltage range from the beginning of the vehicle's low-voltage power supply, a fifth control instruction is generated in the control instruction set. The fifth control instruction is used to control the closing of the switch of the second branch, wherein the second energy storage element has a pre-stored charger power supply voltage.

2. The method according to claim 1, characterized in that, A control instruction set is generated based on the comparison results, including: If the comparison result indicates that the input voltage is outside the preset voltage range, a first control instruction is generated in the control instruction set. The first control instruction is used to control the switching closure of the short-time power supply branch and the switching closure of the auxiliary power supply branch. Obtain the status information of the high-voltage charging circuit, wherein the status information includes: AC terminal status abnormality and DC terminal status abnormality. Based on the status information, one of the second control instruction and the third control instruction in the control instruction set is generated. The second control instruction is used to control the power conversion module to perform DC-to-AC conversion mode, and the third control instruction is used to control the power conversion module to perform AC-to-DC conversion mode.

3. The method according to claim 2, characterized in that, Based on the status information, one of the second control instruction and the third control instruction in the control instruction set is generated, including: In the case where the status information indicates that the AC terminal is in an abnormal state; Receive the reverse inverter enable signal and generate the second control command based on the reverse inverter enable signal.

4. The method according to claim 2, characterized in that, Based on the state information, one of the second control instruction and the third control instruction in the control instruction set is generated, and the method further includes: If the status information indicates that the DC terminal status is abnormal, the third control command is generated.

5. A control device for auxiliary power supply of a charger, characterized in that, include: The acquisition module is used to acquire the input voltage of the low-voltage power supply circuit, wherein the low-voltage power supply circuit is used to provide low-voltage DC to the charger; The comparison module is used to compare the input voltage with a preset voltage range to obtain a comparison result; A generation module is used to generate a control instruction set based on the comparison result. The control instruction set is used to control the switching state of the short-time power supply branch, the switching state of the auxiliary power supply branch, and the conversion mode of the power conversion module. The short-time power supply branch is equipped with an energy storage element. The short-time power supply branch is used to replace the low-voltage power supply circuit to provide low-voltage DC power to the charger within a preset time period. The auxiliary power supply branch is used to use the current in the high-voltage charging circuit of the charger to power the charger. The short-time power supply branch is electrically connected to the low-voltage power supply circuit. The short-time power supply branch includes a first branch equipped with a first energy storage element and a second branch equipped with a second energy storage element. The first branch and the second branch are connected in parallel. The generation module is also used for: If the comparison result indicates that the input voltage is within the preset voltage range, a fourth control instruction is generated in the control instruction set. The fourth control instruction is used to control the switch of the first branch to close until the voltage of the first energy storage element is equal to the input voltage. The input voltage is continuously monitored in real time. If the input voltage is outside the preset voltage range, the switch of the first branch is controlled to close again to achieve external discharge. If the comparison result indicates that the input voltage is outside the preset voltage range from the beginning of the vehicle's low-voltage power supply, a fifth control instruction is generated in the control instruction set. The fifth control instruction is used to control the closing of the switch of the second branch, wherein the second energy storage element has a pre-stored charger power supply voltage.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 4.

7. A processor, characterized in that, The processor is used to run a program, wherein the program is configured to execute the method described in any one of claims 1 to 4 when running.

8. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the method described in any one of claims 1 to 4.

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