Wireless charging receiving system, low-voltage power supply method and wireless charging method

Abstract

The invention provides a wireless charging receiving system, a low-voltage power supply method and a wireless charging method, and relates to the technical field of wireless charging. The system comprises a power transmission loop and a low-voltage power supply loop, wherein the power transmission loop is used for receiving energy output by a wireless charging emission system and converting and outputting the energy; the low-voltage power supply loop comprises a flyback power supply and a low-voltage power supply, the input end of the flyback power supply is electrically connected with the power transmission loop, the output end of the flyback power supply is electrically connected with a low-voltage power utilization mechanism, and the output end of the low-voltage power supply is electrically connected with the low-voltage power utilization mechanism; the flyback power supply is used for supplying power to the low-voltage power utilization mechanism when a first power supply abnormal condition is not met, and the low-voltage power supply is used for supplying power to the low-voltage power utilization mechanism when the flyback power supply meets the first power supply abnormal condition. By arranging the low-voltage power supply loop comprising the flyback power supply and the low-voltage power supply, the reliability and safety of wireless charging can be improved at low cost.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and more specifically, to a wireless charging receiving system, a low-voltage power supply method, and a wireless charging method. Background Technology

[0002] With the continuous increase in the number of electric vehicles on the road and the gradual development of autonomous driving technology, the battery capacity of electric vehicles continues to increase, and users' demands for driving range and charging convenience are becoming increasingly urgent. Wireless charging technology, due to its ease of operation and high degree of automation, is regarded as an important development direction for solving the charging experience problems of electric vehicles.

[0003] In wireless charging systems for electric vehicles, the receiver typically requires a low-voltage power supply to provide continuous and stable power to the control unit, communication unit, and drive circuit. However, if the low-voltage power supply at the receiver cannot maintain normal operation in the event of an unexpected battery failure, wireless charging will be unsafe and may even damage power devices due to overvoltage, undervoltage, or other abnormalities, seriously affecting the safety of the wireless charging system and the entire vehicle. Therefore, ensuring the reliability and safety of the wireless charging process even when the battery is depleted has become one of the key issues in the design of wireless charging receivers.

[0004] Currently, related technologies typically employ a dual-power supply scheme at the wireless charging receiver, which involves adding a low-voltage backup power supply to the existing low-voltage power supply to ensure the reliability of the receiver's low-voltage system. While this scheme improves the redundancy and safety of the wireless charging system to some extent, it also introduces new problems, such as high circuit architecture complexity, increased power supply cost and size, and the introduction of new electromagnetic compatibility issues. Summary of the Invention

[0005] The problem this invention addresses is how to improve the reliability and safety of wireless charging at a low cost.

[0006] To address the above problems, this invention provides a wireless charging receiving system, a low-voltage power supply method, and a wireless charging method.

[0007] In a first aspect, the present invention provides a wireless charging receiving system, comprising a power transmission circuit and a low-voltage power supply circuit. The power transmission circuit is used to receive energy output from a wireless charging transmitting system and convert it for output. The low-voltage power supply circuit includes a flyback power supply and a low-voltage power supply. The input terminal of the flyback power supply is electrically connected to the power transmission circuit, and the output terminal of the flyback power supply is electrically connected to a low-voltage power-consuming mechanism. The output terminal of the low-voltage power supply is also electrically connected to the low-voltage power-consuming mechanism. The flyback power supply is used to supply power to the low-voltage power-consuming mechanism when a first power supply anomaly condition is not met, and the low-voltage power supply is used to supply power to the low-voltage power-consuming mechanism when the flyback power supply meets the first power supply anomaly condition.

[0008] Optionally, the power transmission circuit includes a receiving-side resonant network, a rectifier circuit, and an output filter circuit connected in sequence; the input terminal of the flyback power supply is connected to the receiving-side resonant network.

[0009] Optionally, the flyback power supply includes a high-voltage filter circuit and a flyback transformer. The input terminal of the high-voltage filter circuit is connected to the receiving-side resonant network, and the output terminal of the high-voltage filter circuit is electrically connected to the low-voltage power-consuming mechanism through the flyback transformer.

[0010] Optionally, the low-voltage power supply includes a digital signal processor, the power input terminal of which is electrically connected to the output terminals of the flyback power supply and the low-voltage power supply, respectively.

[0011] Optionally, the low-voltage power supply includes a controller, the power input terminal of which is electrically connected to the output terminal of the low-voltage power supply.

[0012] In a second aspect, the present invention also provides a low-voltage power supply method based on the wireless charging receiving system as described in the first aspect; the low-voltage power supply method includes: The first operating parameters of the flyback power supply of the low-voltage power supply circuit of the wireless charging receiving system are obtained during the wireless charging process. When the first operating parameter does not meet the first power supply abnormality condition, the flyback power supply is used to supply power to the low-voltage electrical component; when the first operating parameter meets the first power supply abnormality condition, the low-voltage power supply of the low-voltage power supply circuit is used to supply power to the low-voltage electrical component.

[0013] Optionally, the first operating parameter includes the output voltage; the first power supply abnormality condition includes the output voltage being lower than a preset threshold.

[0014] Thirdly, the present invention also provides a wireless charging method based on the wireless charging receiving system as described in the first aspect; the wireless charging method includes: In response to the command to start the wireless charging process, the system obtains the current second operating parameters of the low-voltage power supply of the low-voltage power supply circuit of the wireless charging receiving system. When the second operating parameter meets the second power supply abnormality condition, a fault prompt message is generated and the wireless charging process is stopped.

[0015] Optionally, the wireless charging method further includes: During wireless charging, the current third operating parameter of the low-voltage power supply is acquired; When the third operating parameter meets the second power supply abnormality condition, the wireless charging process is stopped.

[0016] Optionally, the second power supply abnormality condition includes the output voltage of the low-voltage power supply being lower than a preset threshold, or the communication between the low-voltage power supply and the controller of the wireless charging receiving system being abnormal.

[0017] The beneficial effects of the wireless charging receiving system, low-voltage power supply method, and wireless charging method of the present invention are as follows: The wireless charging receiving system of the present invention forms a dual-path power supply mechanism by setting up a flyback power supply that draws power from the power transmission circuit and an independently operable low-voltage power supply. That is, under normal operating conditions (such as when the flyback power supply does not meet the preset first power supply abnormality condition), the flyback power supply obtains energy from the power transmission circuit and, after appropriate processing, provides stable low-voltage power to the corresponding low-voltage electrical device, ensuring its continuous and stable operation; when the flyback power supply is abnormal (such as when the flyback power supply meets the preset first power supply abnormality condition), the low-voltage power supply can automatically switch to the low-voltage power supply process and continue to supply power to the corresponding low-voltage electrical device, thereby avoiding the corresponding problems caused by the low-voltage power supply interruption. In this way, the reliability and safety of wireless charging are improved at a low cost. This not only effectively improves the safety and reliability of the wireless charging process and reduces the risk of vehicle failure caused by power supply abnormalities, but also significantly simplifies the circuit architecture, reduces the cost and size of the wireless charging system, and avoids electromagnetic compatibility issues caused by dual power supplies, while ensuring power supply redundancy compared to related technologies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the wireless charging receiving system and the wireless charging transmitting system in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the wireless charging receiving system and the wireless charging transmitting system in another embodiment of the present invention. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] 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 sequences other than those illustrated or described herein.

[0021] Combination Figure 1 As shown, this embodiment of the invention provides a wireless charging receiving system, including a power transmission circuit and a low-voltage power supply circuit. The power transmission circuit is used to receive energy output from a wireless charging transmitting system and convert it for output. The low-voltage power supply circuit includes a flyback power supply and a low-voltage power supply. The input terminal of the flyback power supply is electrically connected to the power transmission circuit, and the output terminal of the flyback power supply is electrically connected to the low-voltage power-consuming mechanism. The output terminal of the low-voltage power supply is also electrically connected to the low-voltage power-consuming mechanism. The flyback power supply is used to supply power to the low-voltage power-consuming mechanism when a first power supply anomaly condition is not met, and the low-voltage power supply is used to supply power to the low-voltage power-consuming mechanism when the flyback power supply meets the first power supply anomaly condition.

[0022] In this embodiment, the wireless charging receiver system, as the energy receiving part of the wireless charging system, can be installed on an electric vehicle to receive energy transmitted from an external wireless charging transmitter system, thereby achieving wireless charging. The power transmission circuit of the wireless charging receiver system receives and converts the energy output from the wireless charging transmitter system, realizing energy transfer from the receiving coil to the DC bus, providing a stable power supply to an energy storage device (such as the power battery of an electric vehicle) electrically connected to the DC bus. The low-voltage power supply circuit of the wireless charging receiver system provides continuous and stable low-voltage power (such as low-voltage DC power) to the low-voltage electrical components of the wireless charging receiver system. It includes a flyback power supply and a low-voltage power supply. The input terminal of the flyback power supply is electrically connected to the power transmission circuit to obtain energy from it; the output terminal of the flyback power supply is electrically connected to the low-voltage electrical component. After the flyback power supply isolates and steps down the energy obtained from the power transmission circuit, it can output stable low-voltage DC power to the low-voltage electrical component. The low-voltage power supply, as an independently configured power source, can store electrical energy and release it to the low-voltage electrical component of the wireless charging receiver system when needed.

[0023] During wireless charging, the flyback power supply, which does not meet the first power supply anomaly condition (i.e., normal power supply), draws power from the power transmission circuit to supply power to the corresponding low-voltage electrical components, thereby ensuring their normal operation. The low-voltage power supply can serve as a backup power source for the flyback power supply, automatically switching when the flyback power supply is abnormal (e.g., the flyback power supply meets the first power supply anomaly condition), providing continuous and stable low-voltage power to the low-voltage electrical components. This prevents the low-voltage electrical components from failing, becoming uncontrollable, or even being damaged due to low-voltage power supply interruptions, thus affecting the normal operation of wireless charging. This improves the safety and reliability of the wireless charging process while reducing the risk of vehicle malfunctions caused by power supply anomalies. The low-voltage electrical components include controllers (such as microcontrollers (MCUs), digital signal processors (DSPs), communication units (for communicating with the wireless charging transmitter system), drivers (for driving the corresponding power devices in the wireless charging receiver system to switch on and off), and other auxiliary circuits (or mechanisms) that require low-voltage power.

[0024] For example, the first power supply anomaly condition is used to determine whether the flyback power supply to the low-voltage electrical component is abnormal during wireless charging. For instance, the first operating parameters include the flyback power supply's output voltage, output current, or power. Correspondingly, the first power supply anomaly condition can be set as follows: the flyback power supply (or output) voltage to the low-voltage electrical component is lower than a preset threshold, or the output current is lower than a preset current threshold, or the output power is lower than a preset power threshold, or the first power supply anomaly condition is a combination of the above conditions, etc. In this way, by sampling and comparing key operating parameters such as voltage, current, or power in real time, the corresponding operating status of the flyback power supply can be flexibly reflected. This facilitates timely identification and switching to low-voltage power supply when its power supply capacity is insufficient or fluctuates, thereby preventing abnormalities in the wireless charging process caused by power failure, malfunction, or loss of control of the low-voltage electrical component, and ensuring the stability and safety of the wireless charging receiving system.

[0025] In summary, the wireless charging receiving system of this embodiment forms a dual-path power supply mechanism by setting up a flyback power supply that draws power from the power transmission circuit and an independently operating low-voltage power supply. This mechanism consists of a main flyback power supply and a backup low-voltage power supply. Under normal operating conditions (e.g., if the flyback power supply does not meet a preset first power supply anomaly condition), the flyback power supply obtains energy from the power transmission circuit, processes it accordingly, and provides stable low-voltage power to the corresponding low-voltage electrical components, ensuring their continuous and stable operation. When the flyback power supply fails (e.g., if the flyback power supply meets a preset first power supply anomaly condition), the low-voltage power supply can automatically switch to the low-voltage power supply process to continue supplying power to the corresponding low-voltage electrical components, thereby avoiding problems caused by low-voltage power supply interruptions. This significantly improves the reliability and safety of wireless charging at low cost. It not only effectively enhances the safety and reliability of the wireless charging process and reduces the risk of vehicle malfunctions caused by power supply anomalies, but also, compared to dual-power supply solutions in related technologies, significantly simplifies the circuit architecture, reduces the cost and size of the wireless charging system, and avoids electromagnetic compatibility issues caused by dual power supplies while ensuring power redundancy.

[0026] Optionally, combined Figure 2 As shown, the power transmission circuit includes a receiving-side resonant network, a rectifier circuit, and an output filter circuit that are connected in sequence; the input terminal of the flyback power supply is connected to the receiving-side resonant network.

[0027] In this embodiment, the power transmission circuit includes a receiving-side resonant network, a rectifier circuit, and an output filter circuit connected in sequence. The receiving-side resonant network is used to receive high-frequency energy output from the wireless charging transmitter system and form resonance compensation. The rectifier circuit is used to rectify the AC power output from the receiving-side resonant network into DC power. The output filter circuit is used to filter out the ripple in the output of the rectifier circuit and provide a stable DC voltage on the DC bus to achieve efficient energy transfer from the receiving coil to the DC bus, and can further provide charging power for energy storage devices (such as the power battery of an electric vehicle).

[0028] In this power transmission circuit, the input of the flyback power supply is connected to the receiving-side resonant network to directly obtain some energy from the resonant network. After isolation and voltage reduction, it outputs low-voltage DC power, thus providing a stable operating power supply for the low-voltage components of the wireless charging receiver system. This allows the flyback power supply to draw power for low-voltage operation even before the power transmission circuit has fully established a stable DC output, ensuring the stability of the wireless charging receiver system during power-on startup and initial operation, and preventing operational abnormalities caused by the lack of low-voltage power.

[0029] Optionally, the flyback power supply includes a high-voltage filter circuit and a flyback transformer. The input of the high-voltage filter circuit is connected to the receiving-side resonant network, and the output of the high-voltage filter circuit is electrically connected to the low-voltage power-consuming mechanism through the flyback transformer.

[0030] In this embodiment, the flyback power supply includes a high-voltage filter circuit and a flyback transformer. The input terminal of the high-voltage filter circuit is connected to the receiving-side resonant network to filter the high-frequency energy input to the flyback power supply, thereby reducing high-frequency interference components and improving the input waveform quality, thus providing conditions for the stable operation of the subsequent flyback transformer. The output terminal of the high-voltage filter circuit is electrically connected to the primary winding of the flyback transformer, while the secondary winding of the flyback transformer (after rectification and voltage regulation) is electrically connected to the low-voltage power-consuming mechanism. The flyback transformer is used to achieve electrical isolation of the input flyback power supply and to achieve voltage reduction and reasonable power distribution of the input voltage through the turns ratio, thereby providing continuous and stable low-voltage DC power to the low-voltage power-consuming mechanism.

[0031] Thus, the high-voltage filter circuit effectively ensures the power quality at the input of the flyback power supply; the flyback transformer serves both as an isolation and voltage reduction mechanism, enabling the flyback power supply to provide power to low-voltage electrical components before a stable DC bus voltage is established in the power transmission circuit, thus ensuring the reliability and safety of the wireless charging receiving system during startup and operation.

[0032] Optionally, the wireless charging receiving system further includes a power conversion processing mechanism, which is disposed between the flyback power supply and the low-voltage power-consuming mechanism, and / or between the low-voltage power supply and the low-voltage power-consuming mechanism. The power conversion processing mechanism converts the electrical energy output from the flyback power supply and / or the low-voltage power supply into a form of electrical energy suitable for the input of the low-voltage power-consuming mechanism. For example, it performs voltage step-down or step-up, current stabilization, and power isolation or filtering to output low-voltage DC power that meets the operating voltage level, stability, and electromagnetic compatibility requirements of the low-voltage power-consuming mechanism. Exemplarily, the power conversion processing mechanism includes an isolation power supply module, a DC / DC converter circuit, a voltage regulator circuit, or a filter circuit, etc., to isolate, step down, stabilize, or filter the electrical energy output from the flyback power supply or the low-voltage power supply, thereby meeting the power supply requirements of the low-voltage power-consuming mechanism. In some embodiments, the flyback power supply is equipped with a rectifier circuit, or the flyback power supply achieves rectification through a power conversion processing mechanism, thereby converting the AC power induced on the secondary side of the flyback transformer into DC power, and after appropriate processing, supplying a stable low-voltage DC power to the low-voltage power-consuming mechanism.

[0033] Optionally, the flyback power supply or power conversion processing mechanism can output at least one voltage to meet the power supply needs of different low-voltage electrical components. For example, the output voltage can be a single voltage level, such as 18V, 12V, 5V, or 3V, or it can be multiple voltage levels, such as simultaneously outputting multiple of the above voltage levels to supply low-voltage electrical components with different power supply voltage requirements. In this way, the dependence of the wireless charging receiving system on multiple power supply modules is reduced, and while reducing the complexity and cost of the power supply architecture, it ensures that various low-voltage electrical components can obtain stable power matching their operating voltage level, further improving the integration and reliability of the wireless charging receiving system.

[0034] Optionally, combined Figure 2 As shown, the low-voltage power supply includes a digital signal processor, whose power input terminal is electrically connected to the output terminals of the flyback power supply and the low-voltage power supply, respectively.

[0035] In this embodiment, the low-voltage power supply includes a digital signal processor (DSP) for real-time processing and control of the operating parameters, power transmission status, and communication information of the wireless charging system receiver (i.e., the wireless charging receiving system). The power input terminal of the DSP is electrically connected to the output terminals of both the flyback power supply and the low-voltage power supply to ensure a stable and continuous power supply for the DSP. For example, under normal operating conditions, the flyback power supply draws power from the power transmission circuit and, after isolation and voltage reduction, provides a stable low-voltage DC power supply to the DSP, enabling it to continuously execute control algorithms, data processing, and status monitoring tasks. When the flyback power supply experiences a power outage, the low-voltage power supply automatically switches in to continuously power the DSP, thereby preventing control logic interruptions, data loss, or communication failures caused by power failure of the DSP. This further enhances the safety and reliability of the wireless charging receiving system and the wireless charging system it belongs to.

[0036] Optionally, combined Figure 2 As shown, the low-voltage power supply includes a controller, and the power input terminal of the controller is electrically connected to the output terminal of the low-voltage power supply.

[0037] In this embodiment, the low-voltage power supply includes a controller (such as a microcontroller (MCU)) that monitors and manages the overall operating status of the wireless charging receiver system, enabling functions such as power-on self-test, communication interaction with the wireless charging transmitter system, and fault handling. The controller's power input is electrically connected to the output of the low-voltage power supply to ensure that even if the flyback power supply is not established, temporarily interrupted, or abnormally failed during the operation of the wireless charging receiver system, the controller can still rely on the low-voltage power supply for continuous power supply. This ensures uninterrupted control logic, especially before wireless charging is established. The controller, powered by the low-voltage power supply, can complete necessary communication initialization, self-test confirmation, and handshake with the wireless charging transmitter system, thereby guiding the establishment of wireless charging and preventing wireless charging startup failure due to the flyback power supply not yet having established an output. This significantly improves the reliability and safety of the wireless charging receiver system under complex operating conditions.

[0038] Optionally, combined Figure 2 As shown, the low-voltage power supply mechanism includes a driver (or drive unit), which drives the corresponding power devices in the power transmission circuit to switch on and off. For example, the driver can be a power switch drive circuit, whose input terminal is electrically connected to the control signal output terminal of a digital signal processor or controller to receive control signals; its output terminal is electrically connected to the control terminal of the power device (such as a MOSFET, IGBT, etc.) in the power transmission circuit, to apply a drive voltage or current to the gate / control terminal of the power device under the action of the control signal, thereby realizing the sequential turn-on and turn-off of the power device. This ensures that the power transmission circuit operates stably according to the preset control logic, avoiding overheating, runaway, or damage to the device due to insufficient or failed driving, further improving the operational reliability and safety of the wireless charging receiving system.

[0039] Another embodiment of the present invention provides a low-voltage power supply method based on the above-described wireless charging receiving system; the low-voltage power supply method includes: The first operating parameters of the flyback power supply in the low-voltage power supply circuit of the wireless charging receiving system are obtained during the wireless charging process. When the first operating parameter does not meet the first power supply abnormality condition, the flyback power supply is used to supply power to the low-voltage electrical component; when the first operating parameter meets the first power supply abnormality condition, the low-voltage power supply of the low-voltage power supply circuit is used to supply power to the low-voltage electrical component.

[0040] The method described in this embodiment can be applied to the wireless charging receiving system described above to ensure a stable power supply to the low-voltage power-consuming components in the wireless charging receiving system.

[0041] Specifically, during the wireless charging process, an energy transmission link has been established between the wireless charging receiving system and the wireless charging transmitting system. At this time, the operating parameters of the flyback power supply (referred to as the first operating parameter) are monitored in real time to determine whether the power supply status of the flyback power supply is normal. When the first operating parameter does not meet the first power supply abnormality condition (which is used to determine whether the flyback power supply to the low-voltage power-consuming mechanism is abnormal during wireless charging), it indicates that the flyback power supply to the low-voltage power-consuming mechanism is normal. At this time, the flyback power supply is used to supply power to the low-voltage power-consuming mechanism and maintain it, so as to ensure that the flyback power supply undertakes the main low-voltage power supply task during normal operation and avoids excessive discharge of the low-voltage power supply. When the first operating parameter meets the first power supply abnormality condition, it indicates that the flyback power supply to the low-voltage power-consuming mechanism is abnormal. At this time, the low-voltage power supply circuit is controlled to switch to the low-voltage power supply, so that the low-voltage power supply is connected to provide continuous and stable low-voltage DC power to the low-voltage power-consuming mechanism. In this way, it effectively avoids the failure, loss of control or even damage of the corresponding low-voltage power-consuming mechanism caused by the abnormality of the flyback power supply, and affects the normal operation of wireless charging. It ensures the stability, reliability and continuity of the low-voltage power supply of the wireless charging receiving system, as well as the stability and safety of the wireless charging process. In some embodiments, the first operating parameters include the output voltage, output current, or power of the flyback power supply. When the output voltage, output current, or power of the flyback power supply does not meet the power supply requirements of the corresponding low-voltage electrical appliance, it is considered that the first power supply abnormality condition is met; otherwise, it is considered that the first power supply abnormality condition is not met.

[0042] In summary, the method of this embodiment can automatically select the most suitable voltage power supply path under different operating conditions, ensuring uninterrupted operation of low-voltage power-consuming mechanisms; compared with the dual power supply scheme in related technologies, the method of this embodiment can improve the reliability and safety of wireless charging at a low cost.

[0043] Preferably, the output voltage value of the flyback power supply is obtained through a voltage sampling module and compared with a preset threshold. When the monitoring result shows that the first operating parameter is within the normal range, the control logic maintains the flyback power supply to power the low-voltage components. However, when the monitoring result shows that the first operating parameter meets the first abnormal power supply condition (e.g., the output voltage is lower than the preset threshold, or the current is insufficient to maintain the load operation), the system immediately triggers switching control, shuts down the flyback power supply output path, and connects to the low-voltage power supply to ensure the continuous operation of low-voltage components such as the controller, digital signal processor, and driver, and avoids power outages, loss of control, or communication interruptions caused by flyback power supply abnormalities. Through the above configuration, real-time monitoring and rapid switching of the flyback power supply status are achieved, thereby significantly improving the safety and reliability of the wireless charging receiving system.

[0044] Optionally, the first operating parameter includes the output voltage; the first power supply abnormality condition includes the output voltage being lower than a preset threshold.

[0045] Specifically, the first operating parameter includes the output voltage of the flyback power supply. Based on this, during wireless charging, the output terminal of the flyback power supply is sampled in real time by a voltage sampling circuit to obtain the output voltage of the flyback power supply. This output voltage is then compared with a preset threshold. If the detection result shows that the output voltage is higher than or equal to the preset threshold, it is determined that the flyback power supply is in normal working condition and does not meet the first power supply abnormality condition. In this case, the flyback power supply is used to supply power to the low-voltage electrical components. If the output voltage of the flyback power supply is lower than the preset threshold, it is determined that the flyback power supply has experienced a power supply abnormality and meets the first power supply abnormality condition. In this case, the power supply is automatically switched to the low-voltage power supply for low-voltage power supply, and the low-voltage power supply undertakes the power supply task, thereby avoiding problems such as power outages, failures, or loss of control of the low-voltage electrical components due to insufficient output of the flyback power supply.

[0046] Therefore, considering the voltage-driven characteristics of most low-voltage electrical devices, the output voltage is used as a direct criterion for the working state of the flyback power supply. The detection method is simple and has a fast response speed. This not only ensures the stability of the low-voltage power supply path and the safety of the wireless charging process, but also reduces the implementation cost of detection and control.

[0047] Another embodiment of the present invention provides a wireless charging method based on the above-described wireless charging receiving system; the wireless charging method includes: In response to the command to start the wireless charging process, the system obtains the current second operating parameters of the low-voltage power supply of the low-voltage power supply circuit of the wireless charging receiving system. When the second operating parameter meets the second power supply abnormality condition, a fault prompt message is generated and the wireless charging process is stopped.

[0048] Specifically, considering the impact of the low-voltage power supply circuit's operating status on wireless charging, in this embodiment, upon receiving a command to start the wireless charging process (denoted as the wireless charging process start command), a response is made to sample (or acquire) the operating parameters of the low-voltage power supply in the low-voltage power supply circuit (denoted as the second operating parameters) to determine the current operating status of the low-voltage power supply. When the second operating parameters meet the second power supply abnormality condition (which is used to determine whether the low-voltage power supply to the low-voltage electrical device is abnormal during the wireless charging process), it indicates that the low-voltage power supply is abnormal and cannot provide reliable power to the corresponding low-voltage electrical device. At this time, a fault prompt message is generated and the wireless charging process is prevented from starting, so as to avoid blindly establishing a wireless charging energy transmission link under the condition of low-voltage power supply abnormality, thereby avoiding the harm caused by the abnormal wireless charging process and effectively ensuring the safety and reliability of the wireless charging process. The fault prompt message can be output in various ways (such as sound, light, etc.) to prompt the user or the transmitter that there is a problem with the low-voltage power supply in the current wireless charging receiving system, so that the user can take timely and effective inspection or maintenance measures. In some embodiments, the second operating parameters include the output voltage, output current, or power of the low-voltage power supply. When the output voltage, output current, or power of the low-voltage power supply does not meet the power supply requirements of the corresponding low-voltage power-consuming institution, it is considered that the second power supply abnormality condition is met; otherwise, it is considered that the second power supply abnormality condition is not met.

[0049] In summary, this embodiment's method acquires the second operating parameters of the low-voltage power supply before the wireless charging process begins, and determines whether the low-voltage power supply meets the second power supply anomaly condition based on these parameters, thereby achieving early detection of the low-voltage power supply circuit's operating status. When a low-voltage power supply anomaly is detected, this embodiment's method can promptly generate fault warning information and prevent the wireless charging process from starting. This avoids blindly establishing an energy transmission link when the low-voltage power supply cannot provide reliable power to the low-voltage electrical appliance, thus preventing safety risks caused by control logic failure, communication interruption, or driver malfunction. Therefore, this embodiment's method not only ensures the safety and reliability of the wireless charging process, but also, compared to related technologies that rely on detecting power supply anomalies during charging and taking protective measures afterward, this embodiment's method can complete status screening and risk isolation before charging starts, blocking potential hazards in advance and significantly improving the stability and reliability of the wireless charging receiving system.

[0050] Alternatively, the wireless charging method also includes: During wireless charging, the current third operating parameter of the low-voltage power supply is obtained; When the third operating parameter meets the second power supply abnormality condition, the wireless charging process is stopped.

[0051] Specifically, during wireless charging, the current operating parameters of the low-voltage power supply (referred to as the third operating parameter) are monitored in real time to promptly determine whether the power supply status of the low-voltage power supply is normal. When the third operating parameter meets the second power supply abnormality condition, it indicates that the power supply from the low-voltage power supply to the low-voltage electrical component is abnormal. At this time, protection measures are immediately triggered to stop the wireless charging process. This can be achieved by sending a stop charging message to the wireless charging transmitting system or cutting off the drive signals of the corresponding power devices to interrupt the energy transmission link, thereby stopping the wireless charging process and avoiding the risks associated with continuing to transmit energy under abnormal operating conditions. This significantly improves the safety and reliability of the wireless charging receiving system and even the entire vehicle during the wireless charging process.

[0052] Optionally, the second power supply anomaly condition includes the output voltage of the low-voltage power supply being lower than a preset threshold, or communication anomaly between the low-voltage power supply and the controller of the wireless charging receiving system.

[0053] Specifically, considering that voltage fluctuations in the low-voltage power supply during actual operation may directly affect the stability of its power supply to the corresponding low-voltage power-consuming institutions, this embodiment introduces the detection (or real-time sampling) of the low-voltage power supply output voltage into the wireless charging method. When the low-voltage power supply output voltage is detected to be lower than a preset threshold, it is determined that the low-voltage power supply cannot maintain normal power supply, thus meeting the second power supply abnormality condition. Furthermore, considering that the low-voltage power supply has data interaction functions with the controller during operation, such as status reporting, health management, or power information transmission, this embodiment also monitors the communication link between the low-voltage power supply and the controller. When a communication abnormality is detected, such as no feedback signal from the low-voltage power supply for several consecutive cycles, communication message verification errors, or link interruption, the low-voltage power supply power supply status is also determined to be abnormal.

[0054] Thus, any of the above situations is considered to meet the second power supply abnormality condition, and a corresponding fault prompt message is generated, preventing the start of the wireless charging process or directly stopping the wireless charging process. This avoids blindly establishing or maintaining an energy transmission link when the low-voltage power supply cannot provide stable support, and prevents the risks caused by continuing to transmit energy under abnormal operating conditions.

[0055] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A wireless charging receiver system, characterized in that, The system includes a power transmission circuit and a low-voltage power supply circuit. The power transmission circuit receives energy from the wireless charging transmitter system and converts it for output. The low-voltage power supply circuit includes a flyback power supply and a low-voltage power supply. The input terminal of the flyback power supply is electrically connected to the power transmission circuit, and the output terminal of the flyback power supply is electrically connected to the low-voltage power-consuming mechanism. The output terminal of the low-voltage power supply is also electrically connected to the low-voltage power-consuming mechanism. The flyback power supply provides power to the low-voltage power-consuming mechanism when a first power supply anomaly condition is not met, and the low-voltage power supply provides power to the low-voltage power-consuming mechanism when the flyback power supply meets the first power supply anomaly condition.

2. The wireless charging receiving system as described in claim 1, characterized in that, The power transmission circuit includes a receiving-side resonant network, a rectifier circuit, and an output filter circuit that are connected in sequence; the input terminal of the flyback power supply is connected to the receiving-side resonant network.

3. The wireless charging receiving system as described in claim 2, characterized in that, The flyback power supply includes a high-voltage filter circuit and a flyback transformer. The input terminal of the high-voltage filter circuit is connected to the receiving-side resonant network, and the output terminal of the high-voltage filter circuit is electrically connected to the low-voltage power-consuming mechanism through the flyback transformer.

4. The wireless charging receiving system as described in any one of claims 1-3, characterized in that, The low-voltage power supply includes a digital signal processor, the power input terminal of which is electrically connected to the output terminals of the flyback power supply and the low-voltage power supply, respectively.

5. The wireless charging receiving system as described in any one of claims 1-3, characterized in that, The low-voltage power supply includes a controller, and the power input terminal of the controller is electrically connected to the output terminal of the low-voltage power supply.

6. A low-voltage power supply method, characterized in that, The wireless charging receiver system based on any one of claims 1-5; The low-voltage power supply method includes: The first operating parameters of the flyback power supply of the low-voltage power supply circuit of the wireless charging receiving system are obtained during the wireless charging process. When the first operating parameter does not meet the first power supply abnormality condition, the flyback power supply is used to supply power to the low-voltage electrical component; when the first operating parameter meets the first power supply abnormality condition, the low-voltage power supply of the low-voltage power supply circuit is used to supply power to the low-voltage electrical component.

7. The low-voltage power supply method as described in claim 6, characterized in that, The first operating parameter includes the output voltage; the first power supply abnormality condition includes the output voltage being lower than a preset threshold.

8. A wireless charging method, characterized in that, The wireless charging receiver system based on any one of claims 1-5; The wireless charging method includes: In response to the command to start the wireless charging process, the system obtains the current second operating parameters of the low-voltage power supply of the low-voltage power supply circuit of the wireless charging receiving system. When the second operating parameter meets the second power supply abnormality condition, a fault prompt message is generated and the wireless charging process is stopped.

9. The wireless charging method as described in claim 8, characterized in that, The wireless charging method further includes: During wireless charging, the current third operating parameter of the low-voltage power supply is acquired; When the third operating parameter meets the second power supply abnormality condition, the wireless charging process is stopped.

10. The wireless charging method as described in claim 9, characterized in that, The second power supply abnormality condition includes the output voltage of the low-voltage power supply being lower than a preset threshold, or the communication between the low-voltage power supply and the controller of the wireless charging receiving system being abnormal.

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