A charging safety protection method and system for wireless charging

Abstract

The application discloses a charging safety protection method and system for wireless charging, wherein the method comprises the following steps: in response to a power receiving device being placed on a charging placement plane of a wireless charging device, the model and the current power of the power receiving device are acquired; according to the model and the current power of the power receiving device, a first power receiving trend corresponding to the current power and a first equivalent coil are obtained; according to the first power receiving trend, the first equivalent coil and an auxiliary inductive coil module, a second power receiving trend of the auxiliary inductive coil module is solved, and a total power supply trend corresponding to the first power supply coil module is solved; according to the total power supply trend, the first power supply coil module is supplied with power to charge the power receiving device; the auxiliary inductive current in the auxiliary inductive coil module is collected in real time, and whether the auxiliary inductive current conforms to the second power receiving trend is judged; if not, the first power supply coil module is stopped from being supplied with power. The application can detect the charging state of the power receiving device without wireless communication.

Description

Technical Field

[0001] This invention relates to the field of wireless charging, and in particular to a method and system for protecting the safety of wireless charging. Background Technology

[0002] As electrical equipment increasingly demands higher standards for power quality, safety, reliability, convenience, immediacy, and performance in special situations and geographical environments, contact-based power transmission methods are becoming increasingly inadequate for practical needs. Wireless charging devices utilize the principle of electromagnetic induction, similar to a transformer. By placing a coil at both the transmitting and receiving ends, the transmitting coil emits electromagnetic signals under the influence of electricity, while the receiving coil receives these signals and converts them into electrical current, thus achieving wireless charging. Wireless charging technology is a special power supply method that eliminates the need for power cords. It relies on electromagnetic wave propagation to convert electromagnetic wave energy into electrical energy, ultimately achieving wireless charging.

[0003] During wireless charging, there is a risk of the receiving device malfunctioning (such as a short circuit), potentially causing it to burn out or even start a fire. Currently, the receiving device typically detects an anomaly during wireless charging and sends a power-off alert to the wireless charging device, allowing it to cut off power promptly and preventing burnout. However, in reality, malfunctions in the receiving device or environmental factors (such as wireless signal jamming) can prevent it from sending or transmitting information, thus failing to promptly cut off power to the wireless charging device, leaving the risk of burnout still present. Summary of the Invention

[0004] In view of the aforementioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a charging safety protection method and system for wireless charging, which aims to monitor the charging status of the powered device without wireless communication and cut off the power in time to prevent burnout.

[0005] To achieve the above objectives, the first aspect of this invention discloses a charging safety protection method for wireless charging, applied to a wireless charging device, the method comprising:

[0006] In response to the charging placement surface of the wireless charging device, the device obtains its model and current battery level. The wireless charging device includes a first power supply coil module and an auxiliary inductor coil module. The first power supply coil module is disposed within the housing of the wireless charging device. The auxiliary inductor coil module is disposed on one side of the charging placement surface opposite to the first power supply coil module. The auxiliary inductor coil module includes a first inductor coil and a power consumer connected to the first inductor coil. The auxiliary inductor coil module is used to generate current together with the charging device.

[0007] Based on the model of the power receiving device and its current power level, a first power receiving trend and a first equivalent coil corresponding to the current power level are obtained; wherein, the first power receiving trend is a current change trend that conforms to the charging pattern of the power receiving device;

[0008] Based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, the second power receiving trend of the auxiliary inductor coil module is solved, and the total power supply trend corresponding to the first power supply coil module is solved; wherein, the total power supply trend is the changing trend of the power supply current of the auxiliary inductor coil module, and the second power receiving trend is the changing trend of the power receiving current of the auxiliary inductor coil module;

[0009] According to the overall power supply trend, power is supplied to the first power supply coil module to charge the powered device;

[0010] The auxiliary induced current in the auxiliary induction coil module is collected in real time, and it is determined whether the auxiliary induced current conforms to the second power receiving trend. If the auxiliary induced current does not conform to the second power receiving trend, the power supply to the first power supply coil module is stopped. If the auxiliary induced current conforms to the second power receiving trend, the power supply to the first power supply coil module continues.

[0011] Optionally, after obtaining the model and current power level of the powered device, the method further includes:

[0012] The first temperature between the charging placement plane and the power receiving device is collected in real time.

[0013] In response to the first temperature exceeding the threshold, power supply to the first power supply coil module is stopped.

[0014] Optionally, the step of obtaining the model of the powered device in response to the powered device being placed on the charging placement surface of the wireless charging device includes:

[0015] In response to the charging placement surface of the wireless charging device, the weight of the charging device is obtained; wherein, the charging placement surface is provided with a weighing sensor;

[0016] Based on the weight of the power receiving device, obtain the model of the power receiving device that matches the weight of the power receiving device.

[0017] Optionally, before supplying power to the first power supply coil module to charge the powered device according to the overall power supply trend, the method further includes:

[0018] Obtain the first position of the power receiving device on the charging placement plane;

[0019] Based on the first position, adjust the position of the first power supply coil module so that the first power supply coil module corresponds to the power receiving coil of the power receiving device.

[0020] Optionally, obtaining the current power level of the powered device includes:

[0021] After the receiving device is placed on the charging placement surface of the wireless charging device and the wireless charging device does not receive a signal from the receiving device within a preset time, the wireless charging device sends a power query request to the receiving device. If a response is received from the receiving device, the current power level is determined based on the response. If no response is received from the receiving device, the current power level is determined to be zero.

[0022] The second aspect of this invention discloses a charging safety protection system for wireless charging, applied to a wireless charging device. The system includes: a charging information acquisition module, a first trend acquisition module, a second trend acquisition module, a charging module, and a power-off module.

[0023] The charging information acquisition module is used to acquire the model and current battery level of the receiving device in response to the receiving device being placed on the charging placement plane of the wireless charging device. The wireless charging device includes a first power supply coil module and an auxiliary inductor coil module. The first power supply coil module is disposed within the housing of the wireless charging device. The auxiliary inductor coil module is disposed on one side of the charging placement plane opposite to the first power supply coil module. The auxiliary inductor coil module includes a first inductor coil and a power consumer connected to the first inductor coil. The auxiliary inductor coil module is used to generate current together with the receiving device.

[0024] The first trend acquisition module is used to obtain a first power receiving trend and a first equivalent coil corresponding to the current power level based on the model of the power receiving device and the current power level; wherein, the first power receiving trend is a current change trend that conforms to the charging law of the power receiving device;

[0025] The second trend acquisition module is used to solve the second power receiving trend of the auxiliary inductor coil module based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, and to solve the total power supply trend corresponding to the first power supply coil module; wherein, the total power supply trend is the changing trend of the power supply current of the auxiliary inductor coil module, and the second power receiving trend is the changing trend of the power receiving current of the auxiliary inductor coil module;

[0026] The charging module is used to supply power to the first power supply coil module to charge the powered device according to the total power supply trend;

[0027] The power-off module is used to collect the auxiliary induced current in the auxiliary induction coil module in real time and determine whether the auxiliary induced current conforms to the second power receiving trend; if the auxiliary induced current does not conform to the second power receiving trend, the power supply to the first power supply coil module is stopped; if the auxiliary induced current conforms to the second power receiving trend, the power supply to the first power supply coil module continues.

[0028] Optionally, the system further includes a temperature acquisition module and a temperature difference power outage module, wherein the temperature acquisition module and the temperature difference power outage module operate after the charging information acquisition module operates;

[0029] The temperature acquisition module is used to acquire the first temperature between the charging placement plane and the power receiving device in real time;

[0030] The temperature difference power-off module is used to stop supplying power to the first power supply coil module in response to the first temperature exceeding the threshold.

[0031] Optionally, the charging information acquisition module includes: a submodule for obtaining the weight of the powered device and a submodule for obtaining the model of the powered device;

[0032] The device weight acquisition submodule is used to acquire the weight of the device in response to the device being placed on the charging placement plane of the wireless charging device; wherein the charging placement plane is provided with a weighing sensor.

[0033] The power receiving device model acquisition submodule is used to obtain the model of the power receiving device that matches the weight of the power receiving device.

[0034] Optionally, the system further includes: a first position acquisition module and a charging position adjustment module, wherein the first position acquisition module and the charging position adjustment module operate before the charging module operates;

[0035] The first position acquisition module is used to acquire the first position of the power receiving device on the charging placement plane;

[0036] The charging position adjustment module is used to adjust the position of the first power supply coil module according to the first position, so that the first power supply coil module corresponds to the power receiving coil of the power receiving device.

[0037] Optionally, the charging information acquisition module is specifically used for:

[0038] After the receiving device is placed on the charging placement surface of the wireless charging device and the wireless charging device does not receive a signal from the receiving device within a preset time, the wireless charging device sends a power query request to the receiving device. If a response is received from the receiving device, the current power level is determined based on the response. If no response is received from the receiving device, the current power level is determined to be zero.

[0039] The beneficial effects of this invention are as follows: 1. This invention sets up an auxiliary inductor coil module, and then, in response to the charging placement plane of the wireless charging device, obtains the model and current power level of the receiving device; based on the model and current power level of the receiving device, obtains a first power receiving trend and a first equivalent coil corresponding to the current power level; based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, solves for the second power receiving trend of the auxiliary inductor coil module, and solves for the total power supply trend corresponding to the first power supply coil module; based on the total power supply trend, supplies power to the first power supply coil module to charge the receiving device; the auxiliary induced current in the auxiliary inductor coil module is collected in real time, and it is determined whether the auxiliary induced current conforms to the second power receiving trend; if it does not conform, the power supply to the first power supply coil module is stopped; if it conforms, the power supply continues. This invention can detect the charging status of the receiving device without wireless communication. In wireless charging, if the transmitting power remains constant and there are two receiving devices at the receiving end, when the current in one receiving device changes, the other will also change accordingly. This invention adds an auxiliary inductor coil module to monitor current changes in the auxiliary inductor coil module, thereby obtaining the current changes of the receiving device and determining its charging status. If an abnormality is detected, power is immediately cut off, effectively preventing burnout and enhancing charging safety. 2. This invention directly determines the receiving device's status based on current changes in the auxiliary inductor coil module, eliminating the need for wireless communication between the wireless charging device and the receiving device's support. This avoids burnout caused by the receiving device's inability to transmit signals or signal obstruction due to external environmental factors. Real-time current monitoring also improves timeliness. 3. This invention makes corresponding judgments based on the receiving device's model, providing a targeted approach and increasing the accuracy and reliability of the judgment. 4. This invention also adds temperature monitoring to monitor the receiving device's charging status, increasing monitoring methods and effectively preventing abnormal burnout. 5. This invention also adds zero-battery detection to prevent the receiving device from shutting down due to low power and being unable to transmit signals, thus affecting charging. In summary, this invention monitors the charging status of the receiving device without wireless communication and promptly cuts off power to prevent burnout when the receiving device is abnormally charging. Attached Figure Description

[0040] Figure 1This is a flowchart illustrating a wireless charging safety protection method according to a specific embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the structure of a wireless charging safety protection system according to a specific embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the structure of a wireless charging device provided in a specific embodiment of the present invention. Detailed Implementation

[0043] This invention discloses a charging safety protection method for wireless charging. Those skilled in the art can refer to the content of this document and appropriately improve the technical details to implement it. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The method and application of this invention have been described through preferred embodiments. Those skilled in the art can obviously make modifications or appropriate changes and combinations to the methods and applications described herein without departing from the content, spirit, and scope of this invention to implement and apply the technology of this invention.

[0044] The applicant's research revealed two types of malfunctions leading to burnout in existing wireless charging technologies: one is a fault in the wireless charging device itself, and the other is a fault in the receiving device. When the wireless charging device malfunctions, it can automatically detect the problem and cut off power for safety. However, when the receiving device malfunctions, the wireless charging device can only proceed based on information transmitted by the receiving device. This means that failure to receive timely information from the receiving device can lead to burnout. The applicant further discovered that a malfunction in the receiving device means that the current at the receiving end will not change according to a preset pattern.

[0045] Therefore, this invention provides a charging safety protection method for wireless charging, such as... Figure 1 As shown, the method includes:

[0046] Step S101: In response to the charging device being placed on the charging placement plane of the wireless charging device, obtain the model and current battery level of the charging device.

[0047] The wireless charging device includes a first power supply coil module and an auxiliary inductor coil module. The first power supply coil module is disposed inside the housing of the wireless charging device, and the auxiliary inductor coil module is disposed on one side of the charging placement plane opposite to the first power supply coil module. The auxiliary inductor coil module includes a first inductor coil and a power consumer connected to the first inductor coil. The auxiliary inductor coil module is used to receive power and generate current together with the receiving device.

[0048] In one specific embodiment, the structure of the wireless charging device can be as follows: Figure 3 As shown, 301 is the main body of the wireless charging device, 302 is the first power supply coil module, 303 is the auxiliary induction coil module, 304 is the receiving device, 305 is the receiving coil of the receiving device, 306 is a weighing sensor used to obtain the weight of the receiving device, and 307 is the charging placement plane.

[0049] It should be noted that in electromagnetic induction, if there are multiple receivers and the power at the transmitting end remains constant, a change in the current at one receiver (due to a coil malfunction) will cause a corresponding change in the current at the other receivers. Based on this, the embodiments of the present invention include an auxiliary inductor module for monitoring the powered equipment from the side. The power consumption device in the auxiliary inductor module is designed to promptly dissipate the power generated by the first inductor, preventing short circuits or open circuits in the auxiliary inductor module.

[0050] Optionally, in response to the powered device being placed on the charging placement surface of the wireless charging device, the model of the powered device is obtained, including:

[0051] In response to the charging placement surface of the wireless charging device, the weight of the charging device is obtained; wherein, the charging placement surface is equipped with a weighing sensor;

[0052] Based on the weight of the receiving equipment, obtain the model of the receiving equipment that matches the weight of the receiving equipment.

[0053] It should be noted that the weight of a power receiving device is generally a unique identifier, and it is rare for power receiving devices of completely identical weight to have different models. Therefore, in this embodiment of the invention, the weight of the power receiving device can be used to identify its model; knowing the weight allows us to determine the model. Knowing the model allows us to determine the power receiving trend (the most suitable current variation charging process) for that model of power receiving device.

[0054] In another specific embodiment, the model of the receiving device can be generated by the receiving device itself to the wireless charging device.

[0055] In one specific embodiment, obtaining the current power level of the powered device includes:

[0056] After the receiving device is placed on the charging surface of the wireless charging device and the wireless charging device does not receive a signal from the receiving device within a preset time, the wireless charging device sends a power query request to the receiving device. If a response is received from the receiving device, the current power level is determined based on the response. If no response is received from the receiving device, the current power level is determined to be zero.

[0057] This embodiment effectively solves the problem of not being able to obtain the current power level for wireless charging when the receiving device is powered off due to lack of power.

[0058] It should be noted that when the receiving device is not turned off, the current power of the receiving device is generally sent to the wireless charging device by the receiving device.

[0059] Step S102: Based on the model of the power receiving device and the current power level, obtain the first power receiving trend and the first equivalent coil corresponding to the current power level.

[0060] The first power receiving trend refers to the current change trend that conforms to the charging pattern of the receiving device. The charging pattern of the receiving device is the pattern of current change over time that best matches the receiving device. For example, some mobile phones require a large current for fast charging when the current battery is low, and the required current decreases as the current battery level increases to ensure that the device is not damaged.

[0061] Step S103: Based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, solve for the second power receiving trend of the auxiliary inductor coil module, and solve for the total power supply trend corresponding to the first power supply coil module.

[0062] Among them, the overall power supply trend is the changing trend of the power supply current of the auxiliary inductor module, and the second power receiving trend is the changing trend of the power receiving current of the auxiliary inductor module.

[0063] It should be noted that, in the embodiments of the present invention, the total power supply trend takes into account both the first power receiving trend of the powered device and the auxiliary induction coil module.

[0064] Step S104: According to the overall power supply trend, supply power to the first power supply coil module to charge the powered device.

[0065] Among them, the first power receiving trend, the total power supply trend, and the second power receiving trend are all changes in current within a preset time period. This preset time period can be determined according to the situation, such as 30s, 60s, etc.

[0066] Step S105: Collect the auxiliary induced current in the auxiliary induction coil module in real time and determine whether the auxiliary induced current conforms to the second power receiving trend; if the auxiliary induced current does not conform to the second power receiving trend, stop supplying power to the first power supply coil module; if the auxiliary induced current conforms to the second power receiving trend, continue supplying power to the first power supply coil module.

[0067] It should be noted that if the auxiliary induced current does not conform to the second power receiving trend, it indicates an abnormality in the charging of the powered equipment. In this case, power should be cut off to prevent potential burns or fires. If the auxiliary induced current conforms to the second power receiving trend, it indicates that the powered equipment is charging normally.

[0068] In one specific embodiment, after obtaining the model and current power level of the powered device, the method further includes:

[0069] Real-time acquisition of the initial temperature between the charging surface and the powered device;

[0070] In response to the first temperature exceeding the threshold, power supply to the first power supply coil module is stopped.

[0071] In this embodiment, temperature measurement is added to determine whether the powered device is charging normally. Because when the powered device is charging abnormally, its temperature typically rises sharply, temperature detection provides a good way to monitor the charging status of the powered device. Adding temperature measurement diversifies the monitoring process and ensures no omissions.

[0072] In one specific embodiment, before supplying power to the first power supply coil module to charge the powered device according to the overall power supply trend, the method further includes:

[0073] Obtain the first position of the receiving device on the charging placement plane;

[0074] Based on the first position, adjust the position of the first power supply coil module so that the first power supply coil module corresponds to the power receiving coil of the power receiving equipment.

[0075] This embodiment ensures charging efficiency by adjusting the position of the first power supply coil module. In this embodiment, the overall power supply trend is generally calculated based on the optimal position after adjustment.

[0076] Furthermore, the adjustment position of the first power supply coil module can be obtained through image recognition by camera or by calculating the center of gravity using multiple weighing sensors.

[0077] This invention embodiment sets up an auxiliary inductor coil module, and then, in response to the charging placement plane of the wireless charging device, obtains the model and current power level of the charging device; based on the model and current power level of the charging device, obtains a first charging trend and a first equivalent coil corresponding to the current power level; based on the first charging trend, the first equivalent coil, and the auxiliary inductor coil module, solves for a second charging trend of the auxiliary inductor coil module, and solves for the total power supply trend corresponding to the first power supply coil module; based on the total power supply trend, supplies power to the first power supply coil module to charge the charging device; the auxiliary induced current in the auxiliary inductor coil module is collected in real time, and it is determined whether the auxiliary induced current conforms to the second charging trend; if it does not conform, the power supply to the first power supply coil module is stopped; if it conforms, the power supply continues. This invention embodiment can detect the charging status of the charging device without wireless communication. In wireless charging, if the transmitting power remains constant and there are two charging devices at the receiving end, when the current in one charging device changes, the other will also change accordingly. In this embodiment of the invention, an auxiliary inductor coil module is added. By monitoring the current change of the auxiliary inductor coil module, the current change of the powered device is obtained, thereby determining the charging status of the powered device. If an abnormality is found, the power supply is directly stopped, effectively avoiding burnout and increasing charging safety protection.

[0078] The embodiments of the present invention directly determine the status of the powered device based on the current change in the auxiliary induction coil module, without the need for wireless charging device to communicate wirelessly with the powered device bracket, thereby avoiding the problem of device burnout caused by the powered device being unable to send information or the external environment blocking the signal. Real-time current monitoring also improves timeliness.

[0079] The embodiments of the present invention make corresponding judgments based on the model of the powered equipment, thus achieving "targeted treatment" and increasing the accuracy and reliability of the judgment.

[0080] This invention also adds temperature monitoring to monitor the charging status of the powered device, thus increasing the monitoring methods and effectively preventing abnormal burnout.

[0081] This invention also incorporates a zero-battery detection feature to prevent the powered device from shutting down due to lack of power and being unable to send signals, thus affecting charging. In summary, this invention monitors the charging status of the powered device without requiring wireless communication, and promptly cuts off power to prevent burnout when the device is charging abnormally.

[0082] Based on the charging safety protection method for wireless charging provided in the above embodiments, the present invention also provides a charging safety protection system for wireless charging, applied to wireless charging devices, such as... Figure 2The system shown includes: a charging information acquisition module 201, a first trend acquisition module 202, a first trend acquisition module 203, a charging module 204, and a power-off module 205;

[0083] The charging information acquisition module 201 is used to acquire the model and current power of the receiving device in response to the receiving device being placed on the charging placement plane of the wireless charging device. The wireless charging device includes a first power supply coil module and an auxiliary inductor coil module. The first power supply coil module is disposed inside the housing of the wireless charging device. The auxiliary inductor coil module is disposed on one side of the charging placement plane opposite to the first power supply coil module. The auxiliary inductor coil module includes a first inductor coil and a power consumer connected to the first inductor coil. The auxiliary inductor coil module is used to generate current together with the receiving device.

[0084] The first trend acquisition module 202 is used to obtain a first power receiving trend and a first equivalent coil corresponding to the current power level based on the model of the power receiving device and the current power level; wherein, the first power receiving trend is a current change trend that conforms to the charging law of the power receiving device;

[0085] The first trend acquisition module 203 is used to solve the second power receiving trend of the auxiliary inductor coil module and the total power supply trend corresponding to the first power supply coil module based on the first power receiving trend, the first equivalent coil and the auxiliary inductor coil module; wherein, the total power supply trend is the changing trend of the power supply current of the auxiliary inductor coil module and the second power receiving trend is the changing trend of the power receiving current of the auxiliary inductor coil module.

[0086] The charging module 204 is used to supply power to the first power supply coil module to charge the powered device according to the overall power supply trend;

[0087] The power-off module 205 is used to collect the auxiliary induced current in the auxiliary induction coil module in real time and determine whether the auxiliary induced current conforms to the second power receiving trend. If the auxiliary induced current does not conform to the second power receiving trend, the power supply to the first power supply coil module is stopped. If the auxiliary induced current conforms to the second power receiving trend, the power supply to the first power supply coil module continues.

[0088] Optionally, the system also includes a temperature acquisition module and a temperature difference power outage module, which operate after the charging information acquisition module 201 has started working.

[0089] The temperature acquisition module is used to acquire the initial temperature between the charging placement surface and the powered device in real time.

[0090] The temperature difference power failure module is used to stop supplying power to the first power supply coil module in response to the first temperature exceeding a threshold.

[0091] Optionally, the charging information acquisition module 201 includes: a submodule for obtaining the weight of the powered device and a submodule for obtaining the model of the powered device;

[0092] The device weight acquisition submodule is used to acquire the weight of the device in response to the device being placed on the charging placement surface of the wireless charging device; wherein, the charging placement surface is provided with a weighing sensor;

[0093] The power receiving equipment model acquisition submodule is used to obtain the model of the power receiving equipment that matches the weight of the power receiving equipment.

[0094] Optionally, the system also includes: a first position acquisition module and a charging position adjustment module, which operate before the charging module 204 operates;

[0095] The first position acquisition module is used to acquire the first position of the power receiving device on the charging placement plane;

[0096] The charging position adjustment module is used to adjust the position of the first power supply coil module according to the first position, so that the first power supply coil module corresponds to the power receiving coil of the power receiving device.

[0097] Optionally, the charging information acquisition module 201 is specifically used for:

[0098] After the receiving device is placed on the charging surface of the wireless charging device and the wireless charging device does not receive a signal from the receiving device within a preset time, the wireless charging device sends a power query request to the receiving device. If a response is received from the receiving device, the current power level is determined based on the response. If no response is received from the receiving device, the current power level is determined to be zero.

[0099] This invention's system embodiment includes an auxiliary inductor coil module. In response to the device being placed on the charging plane of the wireless charging device, the system obtains the device's model and current battery level. Based on the device's model and current battery level, it obtains a first power receiving trend and a first equivalent coil corresponding to the current battery level. Based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, it calculates a second power receiving trend for the auxiliary inductor coil module and a total power supply trend corresponding to the first power supply coil module. Based on the total power supply trend, it supplies power to the first power supply coil module to charge the device. It also collects the auxiliary induced current in the auxiliary inductor coil module in real time and determines whether the auxiliary induced current conforms to the second power receiving trend. If it does not conform, it stops supplying power to the first power supply coil module; if it does conform, it continues supplying power. This invention's system embodiment can detect the charging status of the device without wireless communication. In wireless charging, if the transmitting power remains constant and there are two devices at the receiving end, a change in the current in one device will cause a corresponding change in the other. The system embodiments of the present invention add an auxiliary inductor coil module accordingly. By monitoring the current change of the auxiliary inductor coil module, the current change of the powered device can be obtained, thereby determining the charging status of the powered device. If an abnormality is found, the power supply is directly stopped, effectively avoiding burnout and increasing charging safety protection.

[0100] The system embodiment of the present invention directly determines the status of the powered device based on the current change in the auxiliary induction coil module, without the need for wireless charging device to communicate wirelessly with the powered device bracket. This avoids the problem of device burnout caused by the powered device being unable to send information or the external environment blocking the signal. Real-time current monitoring also improves timeliness.

[0101] The system embodiment of the present invention makes corresponding judgments based on the model of the powered equipment, thus achieving "targeted treatment" and increasing the accuracy and reliability of the judgment.

[0102] The system embodiment of the present invention also adds temperature monitoring to monitor the charging status of the powered device, which increases the monitoring means and effectively avoids the occurrence of abnormal burnout.

[0103] The system embodiment of this invention also adds a zero-battery detection function to prevent the powered device from shutting down due to lack of power and being unable to send information, thus affecting charging. In summary, the system embodiment of this invention monitors the charging status of the powered device without the need for wireless communication, and promptly cuts off power to prevent burnout when the powered device is abnormally charging.

[0104] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0105] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0106] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A charging safety protection method for wireless charging, characterized in that, Applied to wireless charging devices, the method includes: In response to the charging placement surface of the wireless charging device, the device obtains its model and current battery level. The wireless charging device includes a first power supply coil module and an auxiliary inductor coil module. The first power supply coil module is disposed within the housing of the wireless charging device. The auxiliary inductor coil module is disposed on one side of the charging placement surface opposite to the first power supply coil module. The auxiliary inductor coil module includes a first inductor coil and a power consumer connected to the first inductor coil. The auxiliary inductor coil module is used to generate current together with the charging device. Based on the model of the power receiving device and its current power level, a first power receiving trend and a first equivalent coil corresponding to the current power level are obtained; wherein, the first power receiving trend is a current change trend that conforms to the charging pattern of the power receiving device; Based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, the second power receiving trend of the auxiliary inductor coil module is solved, and the total power supply trend corresponding to the first power supply coil module is solved; wherein, the total power supply trend is the changing trend of the power supply current of the auxiliary inductor coil module, and the second power receiving trend is the changing trend of the power receiving current of the auxiliary inductor coil module; According to the overall power supply trend, power is supplied to the first power supply coil module to charge the powered device; The auxiliary induced current in the auxiliary induction coil module is collected in real time, and it is determined whether the auxiliary induced current conforms to the second power receiving trend. If the auxiliary induced current does not conform to the second power receiving trend, the power supply to the first power supply coil module is stopped. If the auxiliary induced current conforms to the second power receiving trend, the power supply to the first power supply coil module continues.

2. The wireless charging safety protection method according to claim 1, characterized in that, After obtaining the model and current power level of the powered device, the method further includes: The first temperature between the charging placement plane and the power receiving device is collected in real time. In response to the first temperature exceeding the threshold, power supply to the first power supply coil module is stopped.

3. The wireless charging safety protection method according to claim 1, characterized in that, The step of obtaining the model of the powered device in response to the device being placed on the charging placement surface of the wireless charging device includes: In response to the charging placement surface of the wireless charging device, the weight of the charging device is obtained; wherein the charging placement surface is provided with a weighing sensor; Based on the weight of the power receiving device, obtain the model of the power receiving device that matches the weight of the power receiving device.

4. The wireless charging safety protection method according to claim 1, characterized in that, Before supplying power to the first power supply coil module to charge the powered device according to the overall power supply trend, the method further includes: Obtain the first position of the power receiving device on the charging placement plane; Based on the first position, adjust the position of the first power supply coil module so that the first power supply coil module corresponds to the power receiving coil of the power receiving device.

5. The wireless charging safety protection method according to claim 1, characterized in that, The step of obtaining the current power level of the power receiving device includes: After the receiving device is placed on the charging placement surface of the wireless charging device and the wireless charging device does not receive a signal from the receiving device within a preset time, the wireless charging device sends a power query request to the receiving device. If a response is received from the receiving device, the current power level is determined based on the response. If no response is received from the receiving device, the current power level is determined to be zero.

6. A wireless charging safety protection system, characterized in that, The system, applicable to wireless charging devices, includes: a charging information acquisition module, a first trend acquisition module, a second trend acquisition module, a charging module, and a power-off module. The charging information acquisition module is used to acquire the model and current battery level of the receiving device in response to the receiving device being placed on the charging placement plane of the wireless charging device. The wireless charging device includes a first power supply coil module and an auxiliary inductor coil module. The first power supply coil module is disposed within the housing of the wireless charging device. The auxiliary inductor coil module is disposed on one side of the charging placement plane opposite to the first power supply coil module. The auxiliary inductor coil module includes a first inductor coil and a power consumer connected to the first inductor coil. The auxiliary inductor coil module is used to generate current together with the receiving device. The first trend acquisition module is used to obtain a first power receiving trend and a first equivalent coil corresponding to the current power level based on the model of the power receiving device and the current power level; wherein, the first power receiving trend is a current change trend that conforms to the charging law of the power receiving device; The second trend acquisition module is used to solve the second power receiving trend of the auxiliary inductor coil module based on the first power receiving trend, the first equivalent coil, and the auxiliary inductor coil module, and to solve the total power supply trend corresponding to the first power supply coil module; wherein, the total power supply trend is the changing trend of the power supply current of the auxiliary inductor coil module, and the second power receiving trend is the changing trend of the power receiving current of the auxiliary inductor coil module; The charging module is used to supply power to the first power supply coil module to charge the powered device according to the total power supply trend; The power-off module is used to collect the auxiliary induced current in the auxiliary induction coil module in real time and determine whether the auxiliary induced current conforms to the second power receiving trend; if the auxiliary induced current does not conform to the second power receiving trend, the power supply to the first power supply coil module is stopped; if the auxiliary induced current conforms to the second power receiving trend, the power supply to the first power supply coil module continues.

7. The wireless charging safety protection system according to claim 6, characterized in that, The system also includes a temperature acquisition module and a temperature difference power outage module, which operate after the charging information acquisition module operates. The temperature acquisition module is used to acquire the first temperature between the charging placement plane and the power receiving device in real time; The temperature difference power-off module is used to stop supplying power to the first power supply coil module in response to the first temperature exceeding the threshold.

8. The wireless charging safety protection system according to claim 6, characterized in that, The charging information acquisition module includes: a power receiving device weight acquisition submodule and a power receiving device model acquisition submodule; The device weight acquisition submodule is used to acquire the weight of the device in response to the device being placed on the charging placement plane of the wireless charging device; wherein the charging placement plane is provided with a weighing sensor. The power receiving device model acquisition submodule is used to obtain the model of the power receiving device that matches the weight of the power receiving device.

9. The wireless charging safety protection system according to claim 6, characterized in that, The system further includes: a first position acquisition module and a charging position adjustment module, wherein the first position acquisition module and the charging position adjustment module operate before the charging module operates; The first position acquisition module is used to acquire the first position of the power receiving device on the charging placement plane; The charging position adjustment module is used to adjust the position of the first power supply coil module according to the first position, so that the first power supply coil module corresponds to the power receiving coil of the power receiving device.

10. The wireless charging safety protection system according to claim 6, characterized in that, The charging information acquisition module is specifically used for: After the receiving device is placed on the charging placement surface of the wireless charging device and the wireless charging device does not receive a signal from the receiving device within a preset time, the wireless charging device sends a power query request to the receiving device. If a response is received from the receiving device, the current power level is determined based on the response. If no response is received from the receiving device, the current power level is determined to be zero.

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