WO2023045136A1

WO2023045136A1 - Wireless charging method and apparatus for lawn mowers and lawn mower system

Info

Publication number: WO2023045136A1
Application number: PCT/CN2021/139242
Authority: WO
Inventors: 郝鹏; 贾启梦
Original assignee: 楚山(深圳)新能源科技有限公司
Priority date: 2021-09-23
Filing date: 2021-12-17
Publication date: 2023-03-30
Also published as: CN113824187A

Abstract

The present application discloses a wireless charging method and apparatus for lawn mowers, and a lawn mower system. Charging request information sent by lawn mowers within a preset range is received, and rated charging power corresponding to lawn mowers that need to be charged is obtained. The charging power of a charging device is adjusted according to the rated charging power of the lawn mowers, i.e. once a lawn mower enters a charging range of a charging station, the charging station obtains the rated charging power of the lawn mower, and adjusts the charging power according to the rated charging power so as to meet the needs of the lawn mower. However, when the charging power is adjusted to a preset power threshold and the power received by the lawn mower is still less than the rated charging power, the foregoing indicates that at said time the misalignment distance between the lawn mower and the charging device is relatively large. At said time, charging is stopped, and a warning signal is issued or the position of the lawn mower is self-adjusted so as to adjust the misalignment distance between the lawn mower and the charging device, thereby preventing the lawn mower from being charged at a low efficiency, which may not only reduce energy waste, but may also increase the charging efficiency of the lawn mower.

Description

A wireless charging method and device for a lawnmower and a lawnmower system

technical field

The present application relates to the technical field of electronic communication, in particular to a wireless charging method and device for a lawnmower and a lawnmower system.

Background of the invention

At present, wireless charging technology has been widely used in the field of electronic products, and its coverage has rapidly expanded from small portable devices such as smart phones and electronic watches to medium and high-power industrial electronics, such as various service and inspection robots. With the development of industrial electronics, the safety of medium and high power wireless charging has been recognized by the majority of users. At the same time, people are increasingly pursuing intelligence in household appliances in order to liberate manpower, among which convenience and safety have become the trend of the current pursuit.

The lawn mower is a kind of electrical equipment that is often used in daily life. The automatic lawn mower is evolved from the traditional manual mowing. It is an automatic equipment that is easy to use and can liberate manpower. At present, there are also intelligent equipment such as lawn mowing robots on the market, which realize unmanned operation and a high degree of automation, which can greatly save manpower. Lawn mowers usually use batteries with small capacity and low power. In large-area mowing operations, the continuous working time needs to be longer. If the distance from the charging device is far away, it needs to return to charge multiple times. Therefore, charging equipment (such as charging piles, etc.) can be set up on the lawn. At present, the commonly used charging equipment is mostly wired charging, contact charging or wireless charging. Wired charging requires manual participation, which is not conducive to the automatic development of lawn mowers. It also reduces the charging efficiency of the lawn mower (it cannot be charged as it is used); the contact charging method will have charging failure or safety problems because of its exposed electrodes, which is not conducive to the automatic development of the lawn mower, and will also reduce the mower. Charging efficiency of grass mower. Although the wireless charging method can be charged at will, if only wireless charging is realized without evaluating and considering the efficiency of wireless charging, it will directly lead to the waste of energy and the problem of low charging efficiency.

Contents of the invention

In order to solve the above-mentioned technical problems, the present application is proposed. Embodiments of the present application provide a wireless charging method and device for a lawn mower, and a lawn mower system, which solve the above-mentioned problem of low wireless charging efficiency for the lawn mower.

According to one aspect of the present application, a wireless charging method for a lawn mower is provided, which is applied to a charging device, and the charging device is wirelessly connected with the lawn mower to charge the lawn mower, and the wireless charging The method includes: obtaining the rated charging power of the lawn mower; adjusting the charging power of the charging device according to the rated charging power of the lawn mower, so that the charging power of the charging device is the same as the charging power of the lawn mower The difference between the rated charging power decreases; and when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower , stop charging.

In an embodiment, before the obtaining the rated charging power of the lawn mower, the wireless charging method further includes: receiving charging request information sent by the lawn mower; The rated charging power includes: acquiring the rated charging power of the lawnmower based on the charging request information.

In an embodiment, the receiving the charging request information sent by the lawn mower includes: receiving the charging request information sent by the lawn mower within a preset distance range of the charging device.

In an embodiment, before receiving the charging request information sent by the mower within the preset distance range of the charging device, the wireless charging method further includes: transmitting within the preset distance range Detecting energy to form an alternating electromagnetic field; receiving a communication connection request sent by the lawnmower; wherein, the lawnmower sends the communication connection request after receiving the detected energy in the alternating electromagnetic field; and based on the The communication connection request is used to communicate with the mower.

In an embodiment, the transmitting detection energy within the preset distance range to form an alternating electromagnetic field includes: periodically emitting the detection energy within the preset distance range to form the alternating electromagnetic field.

In an embodiment, after the communication connection with the lawn mower, the wireless charging method further includes: acquiring the variation of the alternating electromagnetic field; and when the variation of the alternating electromagnetic field is greater than a preset When the change threshold is reached, charging is stopped and a foreign object warning signal is issued.

In an embodiment, the wireless charging method further includes: when the charging power of the charging device is adjusted to be less than the power threshold, and the received power received by the lawn mower is greater than or equal to that of the lawn mower When the rated charging power is used, the charging power of the charging device is maintained to charge the lawnmower.

In an embodiment, the adjusting the charging power of the charging device according to the rated charging power of the lawn mower includes: adjusting the charging current of the charging device according to the rated charging power of the lawn mower. empty ratio.

In an embodiment, when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, Stopping charging includes: stopping charging when the duty ratio of the charging current of the charging device is adjusted to a maximum value and the received power of the lawn mower is less than the rated charging power of the lawn mower.

In one embodiment, after the charging is stopped, the wireless charging method further includes: sending an abnormal warning signal, and/or sending an adjustment instruction to the lawn mower to adjust the lawn mower and the charging device relative position between them.

According to another aspect of the present application, there is provided a wireless charging device for a lawn mower, which is set on a charging device, and the charging device is wirelessly connected with the lawn mower to charge the lawn mower, characterized in that , the wireless charging device includes: an acquisition module, configured to acquire the rated charging power of the lawn mower; an adjustment module, configured to adjust the charging power of the charging device according to the rated charging power of the lawn mower, to reducing the difference between the charging power of the charging device and the rated charging power of the lawn mower; and an execution module, configured to adjust the charging power of the charging device to be greater than or equal to a preset power threshold, and the When the received power received by the lawn mower is less than the rated charging power of the lawn mower, stop charging.

According to another aspect of the present application, there is provided a wireless charging system for a lawn mower, including: a lawn mower, the lawn mower includes a charging receiving device; and a charging device, the charging device includes a charging transmitting device, the The charging transmitting device is wirelessly connected with the charging receiving device to charge the lawn mower; wherein, the charging transmitting device is used to implement the wireless charging method for the lawn mower described in any one of the above.

The wireless charging method, device and lawnmower system provided by this application, after the lawnmower enters the charging range of the charging station, the charging station obtains the rated charging power of the lawnmower, and adjusts the charging according to the rated charging power. The power meets the needs of the lawn mower, and when the charging power is adjusted to the preset power threshold, and the power received by the lawn mower is still less than the rated charging power, it means that the charging of the lawn mower is abnormal at this time, stop charging, Therefore, low-efficiency charging of the lawn mower can be avoided, energy waste can be reduced, and the charging efficiency of the lawn mower can be improved.

Brief description of the drawings

The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute limitations to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

Fig. 1 is a schematic structural diagram of a wireless charging system for a lawn mower provided by an exemplary embodiment of the present application.

Fig. 2 is a schematic flowchart of a wireless charging method for a lawn mower provided by an exemplary embodiment of the present application.

Fig. 3 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 4 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 5 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 6 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 7 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 8 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 9 is a schematic structural diagram of a wireless charging device for a lawn mower provided by an exemplary embodiment of the present application.

Fig. 10 is a schematic structural diagram of a wireless charging device for a lawnmower provided in another exemplary embodiment of the present application.

Fig. 11 is a structural diagram of an electronic device provided by an exemplary embodiment of the present application.

Modes of Carrying Out the Invention

Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described here.

With the continuous development of intelligence, mechanical equipment has gradually realized automatic or semi-automatic operations, such as lawn mowers, etc., while the basis of automation or semi-automation is electrification, such as electric lawn mowers. For scenarios with a large lawn area, the electric energy stored by the electric lawn mower is difficult to meet the operation needs of the entire lawn. Therefore, it is necessary to supplement the electric energy of the electric lawn mower. The way to supplement electric energy can be battery replacement, wired charging, electric contact charging, wireless charging.

For battery replacement, manual operation is required, the degree of automation is low, and spare batteries need to be prepared, which will also increase the cost of use. For wired charging, when the lawn area is large, a longer power cord is required, and longer power cords may cause safety hazards such as power cord entanglement and power cord entanglement with lawn mowers, and wired charging also requires manual labor. The operation has a low degree of automation. For electric shock charging, although there will be no potential safety hazards caused by long power cords, since the metal electrodes of the charging equipment need to be exposed to achieve contact charging, the exposed electrodes will be exposed to oxidation, electric shock, and electrode contamination. Problems such as charging failure, and in actual work, lawn mowers usually carry water, soil and other sundries, and these sundries will bring safety hazards when they come into contact with metal electrodes. In addition, the electric shock charging method requires the lawn mower to charge It is difficult to align the mouth with the metal electrode of the charging device. For wireless charging, it can be realized by magnetic induction and magnetic resonance. There is neither power line problem nor potential safety hazard of exposed metal electrodes, and automatic charging can also be realized. Therefore, this application uses wireless charging to mow grass. Machine supplementary power.

For the wireless charging method of electromagnetic induction, since it requires the distance between the charging coil (located on the charging device) and the receiving coil (located on the lawn mower) to be relatively close (less than 1 cm), if the wireless charging method of electromagnetic induction is used , the positioning requirements for the mower and charging equipment are high, and the power and efficiency of electromagnetic induction are low. Therefore, this application adopts the wireless charging method of magnetic resonance, and uses the magnetic resonance of the charging coil and the receiving coil to realize the energy transfer, so as to realize the supplementary electric energy of the lawn mower, and because the wireless charging method of magnetic resonance is very important for the charging coil and the receiving coil The space distance requirement is low (less than 3 cm), therefore, it can effectively reduce the positioning requirements for lawn mowers and charging equipment.

For the magnetic resonance wireless charging method, if the misalignment distance between the lawn mower and the charging device is large (for example, greater than 2.5 cm), the charging efficiency will be low, which will not only waste energy, but also reduce the charging of the lawn mower. efficiency. In order to solve the problem of charging efficiency of the lawn mower, this application establishes a communication connection between the lawn mower and the charging device, after obtaining the rated charging power of the lawn mower (that is, the rated charging power of the lawn mower), according to the rated charging power Adjust the charging power of the charging equipment to meet high-power charging, that is, the charging power can be adjusted for lawn mowers with different powers to improve charging efficiency; and, in the process of adjusting the charging power, when the charging power is adjusted to the upper limit, it still cannot reach The rated charging power requirement of the lawn mower indicates that the misalignment distance between the lawn mower and the charging device is relatively large at this time, that is, the lawn mower is abnormally charged. This application adjusts the charging power to meet the charging process of the lawnmower for each power requirement, and also monitors the charging effect during the adjustment process, and stops charging or prompts to avoid low-efficiency charging when abnormal charging such as a large misalignment distance occurs.

Fig. 1 is a schematic structural diagram of a wireless charging system for a lawn mower provided by an exemplary embodiment of the present application. As shown in Figure 1, the wireless charging includes: a lawn mower 1 and a charging device 2, the charging device 2 is arranged on the lawn (for example, at least one charging device 2 is set on the lawn according to a preset distance); wherein, the lawn mower 1 Including the charging receiving device 10, the charging device 2 includes a charging transmitting device 20, the charging device 2 is connected to the city network through an underground cable, and the charging transmitting device 20 is wirelessly connected to the charging receiving device 10 to charge the lawn mower.

The charging receiving device 10 is arranged on the side of the mower 1 close to the charging device 2 , and the charging receiving device 10 includes a receiving coil 11 , a receiving control unit 12 and the like. The charging and transmitting device 20 is arranged on one side of the charging equipment 2, and the charging and transmitting device 20 includes a transmitting coil 21, a transmitting control unit 22 and the like. The receiving control unit 12 is communicatively connected with the transmitting control unit 22 to realize the interaction of information and data. The transmitting control unit 22 is used to control the operation of the transmitting coil 21 , and the receiving control unit 12 is used to control the operation of the receiving coil 11 . Specifically, the present application may adopt a kilohertz-level wireless working frequency band to avoid interference from other important working frequency bands, thereby further enhancing the stability of charging work and the anti-interference ability of data interaction.

Fig. 2 is a schematic flowchart of a wireless charging method for a lawn mower provided by an exemplary embodiment of the present application. The wireless charging method of the lawn mower is applied to the launch control unit of the charging device, as shown in Figure 1, the wireless charging method includes:

Step 110: Obtain the rated charging power of the lawnmower.

When the lawn mower needs to be charged, the charging device performs data communication with the corresponding lawn mower to obtain the rated charging power of the lawn mower. That is, the charging device asks the mower for its rated charging power value, so that the charging device can determine its charging power.

Step 120: Adjust the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower decreases.

Specifically, the charging device can increase or decrease output energy or charging power by adjusting parameters such as a duty cycle of its charging current. After knowing the rated charging power of the lawn mower, the charging device adjusts its charging power according to the rated charging power, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower decreases. For example, when the current charging power is greater than the rated charging power, reduce the duty cycle of the charging current to reduce the charging power; The difference between the charging power of the device and the nominal charging power of the mower is reduced. That is, by adjusting the duty cycle of the charging current of the charging device, the charging power of the charging device is equal to or approximately equal to the rated charging power of the lawn mower, so as to ensure that the service life of the lawn mower and its battery is not affected as much as possible. Improve charging efficiency.

Step 130: Stop charging when the charging power of the charging device is adjusted to be greater than or equal to the preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

Specifically, when the charging power of the charging device is adjusted to be greater than or equal to the preset power threshold, and the received power received by the lawn mower is still less than the rated charging power of the lawn mower, it means that the energy emitted by the charging device is relatively large. Some of them are not received by the lawn mower, that is, the energy waste in the current charging process is large. At this time, it is determined that the lawn mower is abnormally charged, and the charging should be stopped. Wherein, the power threshold may be a power value corresponding to the maximum duty cycle of the charging current of the charging device, or may be a fixed multiple (for example, 1.2 times, etc.) of the rated charging power.

The wireless charging method for lawn mowers provided by this application obtains the rated charging power of the corresponding lawn mower that needs to be charged; and adjusts the charging power of the charging device according to the rated charging power of the lawn mower. When the charging power of the charging device is adjusted When it is greater than or equal to the preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower, stop charging; that is, after the lawn mower enters the charging range of the charging station, the charging station will obtain the lawn mower The rated charging power, and adjust the charging power according to the rated charging power to meet the needs of the lawn mower, and when the charging power is adjusted to the preset power threshold and the power received by the lawn mower is still less than the rated charging power, then It shows that the charging of the lawn mower is abnormal at this time, so stop charging, so as to avoid low-efficiency charging of the lawn mower, which can not only reduce the waste of energy, but also improve the charging efficiency of the lawn mower.

Fig. 3 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application. As shown in Figure 3, before step 110, the above wireless charging method may also include:

Step 140: Receive the charging request information sent by the mower.

In an embodiment, the specific implementation manner of step 140 may be: receiving the charging request information sent by the lawnmower within the preset distance range of the charging device. Wherein, the preset distance range can be set in advance, for example, it can be set to allow the maximum distance between the lawn mower and the charging device. When a lawnmower enters the preset distance range of the charging device and the lawnmower sends a charging request message, that is, the lawnmower needs to be charged.

Correspondingly, step 110 is adjusted to: obtain the rated charging power of the lawnmower based on the charging request information.

Fig. 4 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application. As shown in Figure 4, after step 130, the above wireless charging method may also include any one or a combination of two of the following steps:

Step 150: Send out an abnormal warning signal.

Step 160: Send an adjustment command to the lawn mower to adjust the relative position between the lawn mower and the charging device.

In order to avoid energy waste and low-efficiency charging process, the application stops charging when it is confirmed that the charging of the lawnmower is abnormal. This application can also issue an abnormal warning signal to remind the operator to perform manual correction before charging. It should be understood that the abnormal warning signal in this application can be an audible and visual warning signal to remind nearby operators, or an abnormal warning can be given based on a communication network. The signal is sent to the management background or the operator's mobile communication device. The application can also send adjustment instructions to the lawn mower to adjust the relative position between the lawn mower and the charging device, so as to realize the automatic position adjustment of the lawn mower to reduce the misalignment distance between the lawn mower and the charging device until charging The charging power of the device does not exceed the power threshold, and the received power received by the lawn mower is equal to or approximately equal to the rated charging power, thereby realizing automatic charging of the lawn mower and completely eliminating the dependence of the charging process on the operator. It should be understood that, when it is determined that the charging of the lawn mower is abnormal, the present application may execute one of the above steps alone, or may execute multiple steps simultaneously or successively. It should be understood that the present application can also adopt other methods to improve the charging efficiency, such as adjusting the transmission frequency of the charging device to change the received power value of the lawn mower, so as to meet the charging efficiency requirements without adjusting the position of the lawn mower.

Fig. 5 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application. As shown in Figure 5, before step 110, the above wireless charging method may also include:

Step 170: Emit detection energy within a preset distance range to form an alternating electromagnetic field.

The charging device can periodically emit detection energy within the preset distance range to form an alternating electromagnetic field, and the detection energy can be received when the mower enters the preset distance range, wherein the detection energy can be energy A detection signal wave with a very small level.

Step 180: Receive the communication connection request sent by the mower.

Wherein, the lawn mower may send a communication connection request after receiving the detection energy in the alternating electromagnetic field. When the lawn mower receives the detection energy, it means that the charging device can be used normally. After receiving the detection energy, the lawn mower can send a communication connection request to realize the communication connection between the charging vehicle and the lawn mower. When the lawn mower enters the preset range of the charging device but fails to receive the detection energy, it means that the charging device may be faulty and the detection energy cannot be emitted. At this time, a warning or notification message can be sent to the operator, or it can be controlled The mower comes within a preset range of other charging devices to charge.

Step 190: Based on the communication connection request, the lawnmower is connected in communication.

When the charging device receives the communication connection request sent by the lawn mower, it means that the charging device can be charged normally, the communication is normal, and the communication of the lawn mower is normal. At this time, the communication connection between the charging device and the lawn mower is to realize the handshake communication before charging , to facilitate data and information exchange during the subsequent charging process.

Fig. 6 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application. As shown in Figure 6, after step 190, the above wireless charging method may further include:

Step 1100: Obtain the variation of the alternating electromagnetic field.

After obtaining the variation of the alternating electromagnetic field, judge the size relationship between the variation of the alternating electromagnetic field and the preset variation threshold, and execute step 1110 when the variation of the alternating electromagnetic field is greater than the preset variation threshold, otherwise Execute step 110.

Step 1110: Stop charging and issue a foreign object warning signal.

Due to the relatively open working environment of the lawn mower, some conductive foreign objects are likely to stick to the lawn mower during operation, such as metal foreign objects. During the charging process, the metal foreign objects will heat up and melt, or even catch fire. Melting, fire, etc. are likely to cause damage to the mower and charging equipment and more serious safety accidents. Therefore, the present application further considers whether there are metal foreign objects (such as coins, etc.) between the transmitting coil of the charging device and the receiving coil of the lawn mower after the charging device is matched with the lawn mower. Specifically, since the existence of metal foreign matter will change the magnetic field change of the transmitting coil, by detecting the change of the above-mentioned alternating electromagnetic field, when the change of the alternating electromagnetic field is greater than the preset change threshold, it means that the transmitting coil and the receiving coil There may be metal foreign objects between them, at this time, charging will be stopped and a foreign object warning signal will be issued to avoid safety accidents. If it is determined by detecting the change of the alternating electromagnetic field that there is no metal foreign object between the transmitting coil and the receiving coil, the charging device can transmit energy to supplement electric energy for the lawnmower.

Fig. 7 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application. As shown in Figure 7, the above wireless charging method may also include:

Step 1120: When the charging power of the charging device is adjusted to be less than the power threshold and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, maintain the charging power of the charging device to charge the lawn mower.

When the charging power of the charging device is adjusted to a value less than the power threshold, the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, which means that most of the energy emitted by the charging device has been mowed At this time, the charging power of the charging equipment can be maintained to charge the lawn mower, so as to maintain the received power received by the lawn mower equal to or approximately equal to the rated charging power, which ensures the use of the lawn mower while ensuring the charging efficiency life.

Fig. 8 is a schematic flowchart of a wireless charging method for a lawnmower provided in another exemplary embodiment of the present application. As shown in Figure 8, the wireless charging method includes:

Step 810: Enter the standby state, and emit detection energy.

After the charging device is powered on, it enters the standby state, and periodically transmits detection energy to detect whether the receiving coil (corresponding to the lawn mower) is within the corresponding space dislocation range.

Step 820: Determine whether a lawnmower enters the preset distance range of the charging device, if so, go to step 830, otherwise go to step 810.

Step 830: Receive the communication connection request sent by the mower.

If the receiving coil is in an alternating electromagnetic field established by the transmitting coil for detecting energy and receives the detection energy, the lawn mower activates its wireless communication unit and sends a communication connection request to realize the connection between the lawn mower and the charging device. Establish handshake communication between them.

Step 840: Determine whether there is a metal foreign object between the charging device and the mower, if so, go to step 850, otherwise go to step 860.

Step 850: Start charging.

If there is no metal foreign object between the charging device and the lawn mower, according to the charging current value required by the lawn mower, the required energy is transmitted through the transmitting coil, and the energy is transmitted to the battery unit of the lawn mower through the receiving coil .

Step 860: Stop charging and issue a foreign object warning signal.

If there is a metal foreign object between the charging device and the lawn mower, it will send a signal to terminate charging and a signal to charge abnormally, and enter the standby state.

Step 870: Adjust the charging power of the charging device according to the rated charging power of the lawnmower.

According to the target output power of the mower, adjust parameters such as the duty cycle to increase or decrease the output energy or power.

Step 880: When the charging power of the charging device is adjusted to be less than the power threshold and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, maintain the charging power of the charging device to charge the lawn mower.

If the lawn mower can already achieve the output of the target energy before the duty cycle of the charging current of the charging device is adjusted to the maximum value, then the charging device can output the energy stably.

Step 890: Stop charging when the charging power of the charging device is adjusted to be greater than or equal to the preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

If the duty cycle of the charging current of the charging device is adjusted to the maximum value, but the target output energy of the lawn mower is still not reached, it may be due to misalignment of the coil or excessive space. At this point, the charging device stops emitting energy and enters standby mode.

Fig. 9 is a schematic structural diagram of a wireless charging device for a lawn mower provided by an exemplary embodiment of the present application. As shown in Figure 9, the wireless charging device 90 is arranged on the charging equipment, and the charging equipment is wirelessly connected with the lawn mower to charge the lawn mower. The wireless charging device 90 includes: an acquisition module 91 for acquiring the Rated charging power; the adjustment module 92 is used to adjust the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and an execution module 93 , used to stop charging when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

The wireless charging device for the lawn mower provided by the present application obtains the rated charging power of the lawn mower corresponding to the charging through the acquisition module 91; then, the adjustment module 92 adjusts the charging power of the charging device according to the rated charging power of the lawn mower, In order to reduce the difference between the charging power of the charging device and the rated charging power of the lawn mower, when the charging power of the charging device is adjusted to be greater than or equal to the preset power threshold, and the received power received by the lawn mower is less than that of the lawn mower When the rated charging power of the lawn mower is reached, the execution module 93 stops charging; that is, after the lawn mower enters the charging range of the charging station, the charging station obtains the rated charging power of the lawn mower, and adjusts the charging power according to the rated charging power to meet the needs of the lawn mower. When the charging power is adjusted to the preset power threshold, and the power received by the lawn mower is still less than the rated charging power, it means that the lawn mower is abnormally charged at this time, so stop charging to avoid damage to the lawn mower. Low-efficiency charging can not only reduce the waste of energy, but also improve the charging efficiency of the lawn mower.

Fig. 10 is a schematic structural diagram of a wireless charging device for a lawnmower provided in another exemplary embodiment of the present application. As shown in FIG. 10 , the wireless charging device 90 may further include: a receiving module 94 configured to receive charging request information sent by the mower. Correspondingly, the acquiring module 91 is configured to: acquire the rated charging power of the lawnmower based on the charging request information.

In one embodiment, as shown in FIG. 10 , the wireless charging device 90 may further include: a warning module 95 for sending an abnormal warning signal; a position adjustment module 96 for sending an adjustment instruction to the lawn mower to adjust the lawn mowing The relative position between the phone and the charging device.

In one embodiment, as shown in FIG. 10 , the wireless charging device 90 may further include: a detection module 97, configured to emit detection energy within a preset range to form an alternating electromagnetic field; a communication connection module 98, configured to receive The communication connection request sent by the grass mower; the matching connection module 99 is used to match and connect the lawn mower based on the communication connection request.

In an embodiment, as shown in FIG. 10 , the wireless charging device 90 may further include: a magnetic field change acquisition module 910, configured to acquire the change amount of the alternating electromagnetic field; correspondingly, when the change amount of the alternating electromagnetic field is greater than the preset When the variation threshold of , the warning module 95 is further configured to: issue a foreign object warning signal.

In one embodiment, as shown in FIG. 10 , the wireless charging device 90 may further include: a power maintenance module 911, configured to adjust the charging power of the charging device to be less than the power threshold, and the received power received by the mower is greater than Or when it is equal to the rated charging power of the lawn mower, maintain the charging power of the charging device to charge the lawn mower.

Next, an electronic device according to an embodiment of the present application will be described with reference to FIG. 11 . The electronic device may be either or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive collected data from them. input signal.

FIG. 11 illustrates a block diagram of an electronic device according to an embodiment of the present application.

As shown in FIG. 11 , electronic device 10 includes one or more processors 11 and memory 12 .

Processor 11 may be a central processing unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in electronic device 10 to perform desired functions.

Memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and/or cache memory (cache). The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, and the like. One or more computer program instructions can be stored on the computer-readable storage medium, and the processor 11 can execute the program instructions to implement the wireless charging method for a lawnmower in various embodiments of the present application described above and/or other desired functionality. Various contents such as input signal, signal component, noise component, etc. may also be stored in the computer-readable storage medium.

In one example, the electronic device 10 may further include: an input device 13 and an output device 14, and these components are interconnected through a bus system and/or other forms of connection mechanisms (not shown).

When the electronic device is a stand-alone device, the input device 13 may be a communication network connector for receiving collected input signals from the first device and the second device.

In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

The output device 14 can output various information to the outside, including determined distance information, direction information, and the like. The output device 14 may include, for example, a display, a speaker, a printer, a communication network and its connected remote output devices, and the like.

Of course, for the sake of simplicity, only some components related to the present application in the electronic device 10 are shown in FIG. 11 , and components such as bus, input/output interface, etc. are omitted. In addition, according to specific application conditions, the electronic device 10 may also include any other suitable components.

The computer program product can be written in any combination of one or more programming languages to execute the program codes for performing the operations of the embodiments of the present application, and the programming languages include object-oriented programming languages, such as Java, C++, etc. , also includes conventional procedural programming languages, such as the "C" language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server to execute.

The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, but not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or devices, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: electrical connection with one or more conductors, portable disk, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

A wireless charging method for a lawn mower, which is applied to a charging device, and the charging device is wirelessly connected to the lawn mower to charge the lawn mower, wherein the wireless charging method includes:

Obtain the rated charging power of the mower;

Adjusting the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and

When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, charging is stopped.
The wireless charging method according to claim 1, further comprising: before said acquiring the rated charging power of said lawnmower:

receiving the charging request information sent by the mower;

The obtaining the rated charging power of the mower includes:

Based on the charging request information, the rated charging power of the lawn mower is acquired.
The wireless charging method according to claim 2, wherein the receiving the charging request information sent by the lawn mower comprises:

receiving charging request information sent by the lawn mower within a preset distance range of the charging device.
The wireless charging method according to claim 3, characterized in that before receiving the charging request information sent by the mower within the preset distance range of the charging device, further comprising:

emitting detection energy within the preset distance range to form an alternating electromagnetic field;

receiving a communication connection request sent by the lawn mower; wherein, the lawn mower sends the communication connection request after receiving the detected energy in the alternating electromagnetic field; and

Based on the communication connection request, the lawnmower is communication connected.
The wireless charging method according to claim 4, wherein the transmitting detection energy within the preset distance range to form an alternating electromagnetic field comprises:

The detection energy is periodically emitted within the preset distance range to form the alternating electromagnetic field.
The wireless charging method according to claim 4 or 5, characterized in that, after the communication connection with the lawnmower, further comprising:

acquiring the variation of the alternating electromagnetic field; and

When the variation of the alternating electromagnetic field is greater than a preset variation threshold, charging is stopped and a foreign object warning signal is issued.
The wireless charging method according to any one of claims 1 to 6, further comprising:

When the charging power of the charging device is adjusted to be less than the power threshold, and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, maintain the charging power of the charging device to The mower charges.
The wireless charging method according to any one of claims 1 to 7, wherein the adjusting the charging power of the charging device according to the rated charging power of the lawn mower comprises:

The duty cycle of the charging current of the charging device is adjusted according to the rated charging power of the lawnmower.
The wireless charging method according to claim 8, wherein when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the When the rated charging power of the lawn mower, stop charging includes:

When the duty cycle of the charging current of the charging device is adjusted to a maximum value and the received power of the lawn mower is less than the rated charging power of the lawn mower, charging is stopped.
The wireless charging method according to any one of claims 1 to 9, characterized in that, after the charging is stopped, further comprising:

Sending out an abnormal warning signal, and/or sending an adjustment command to the lawn mower to adjust the relative position between the lawn mower and the charging device.
A wireless charging device for a lawn mower, which is arranged on a charging device, and the charging device is wirelessly connected with the lawn mower to charge the lawn mower, wherein the wireless charging device includes:

An acquisition module, configured to acquire the rated charging power of the mower;

An adjustment module, configured to adjust the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and

An execution module, configured to stop charging when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.
The wireless charging device according to claim 11, further comprising:

A receiving module, configured to receive the charging request information sent by the mower;

The acquiring module is further configured to: acquire the rated charging power of the lawnmower based on the charging request information.
The wireless charging device according to claim 12, wherein the receiving module is further configured as:

receiving charging request information sent by the lawn mower within a preset distance range of the charging device.
The wireless charging device according to claim 13, further comprising:

A detection module, configured to emit detection energy within the preset distance range to form an alternating electromagnetic field;

A communication connection module, configured to receive a communication connection request sent by the lawn mower; wherein, the lawn mower sends the communication connection request after receiving the detected energy in the alternating electromagnetic field; and

A matching connection module, configured to communicate with the lawn mower based on the communication connection request.
The wireless charging device according to claim 14, wherein the detection module is further configured to: periodically emit the detection energy within the preset distance range to form the alternating electromagnetic field.
The wireless charging device according to claim 14, further comprising:

an alert module for sending an abnormal alert signal; and/or

The position adjustment module is used to send an adjustment command to the lawn mower to adjust the relative position between the lawn mower and the charging device.
The wireless charging device according to claim 16, further comprising:

A magnetic field change acquisition module, configured to acquire the variation of the alternating electromagnetic field;

Wherein, the warning module is further configured to: stop charging and issue a foreign object warning signal when the variation of the alternating electromagnetic field is greater than a preset variation threshold.
The wireless charging device according to any one of claims 11 to 17, further comprising:

A power maintenance module, configured to maintain the charging power of the charging device when the charging power of the charging device is adjusted to be less than the power threshold and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower. The charging power of the charging device charges the mower.
The wireless charging device according to any one of claims 11 to 18, wherein the adjustment module is further configured as:

The duty cycle of the charging current of the charging device is adjusted according to the rated charging power of the lawnmower.
The wireless charging device according to claim 19, wherein the execution module is further configured to:

When the duty cycle of the charging current of the charging device is adjusted to a maximum value and the received power of the lawn mower is less than the rated charging power of the lawn mower, charging is stopped.
A wireless charging system for a lawn mower, characterized in that it includes:

a lawn mower including a charging receiver; and

Charging equipment, the charging equipment includes a charging transmitting device, and the charging transmitting device is wirelessly connected with the charging receiving device to charge the lawn mower; wherein, the charging transmitting device is used to implement the above claims 1-10 The wireless charging method of the lawnmower described in any one.