Wireless charging method and electronic device

Abstract

The application provides a wireless charging method and an electronic device. The wireless charging method comprises: collecting a battery temperature during a charging process by the electronic device; sending a charging suspension instruction to a wireless power transmitting device by the electronic device when the battery temperature is greater than or equal to a temperature protection threshold; and sending a charging resumption instruction to the wireless power transmitting device by the electronic device when a reduction amplitude of the battery temperature within a preset time period is less than or equal to a first temperature threshold during the charging suspension. When the battery temperature is greater than or equal to the temperature protection threshold, the control module sends the charging suspension instruction to the wireless power transmitting device, thereby avoiding a safety problem caused by excessively high battery temperature. When the reduction amplitude of the battery temperature within the preset time period is less than or equal to the first temperature threshold during the charging suspension, the control module sends the charging resumption instruction to the wireless power transmitting device. The waiting time for restarting the charging after the charging suspension can be shortened, and the charging efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wireless charging, and more specifically, to a wireless charging method and an electronic device. Background Technology

[0002] With the advancement of technology, wireless charging is becoming increasingly common in small electronic devices. In particular, with Apple's Apple Watch supporting wireless charging, wireless charging technology has begun its industrialization process in smart wearable devices.

[0003] Currently, wireless charging for smart wearable devices often employs electromagnetic induction, which generates significant heat, particularly in miniaturized smart wearables such as smartwatches. Overheating of the battery can reduce its lifespan and even cause the device to burn out, leading to accidents. Existing batteries are equipped with charging protection temperatures; when the battery temperature reaches a preset level, the device will stop the wireless charging transmitter from charging the battery. However, excessively long charging times can negatively impact the user experience. Current technology does not offer a solution for resuming charging after a pause to improve efficiency and achieve faster charging. Summary of the Invention

[0004] The purpose of this invention is to provide a wireless charging method and electronic device that can pause charging when the battery temperature reaches a protection temperature and resume charging when the battery temperature decreases, while meeting the requirements of safety and fast charging.

[0005] This application provides an electronic device, which includes:

[0006] Battery;

[0007] Wireless power receiving circuit, used to receive power from wireless power transmitting equipment;

[0008] A charging circuit is used to charge the battery based on the power received by the wireless power receiving circuit.

[0009] Temperature sensor used to collect battery temperature;

[0010] The control module is used to send a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold during charging; and during the pause charging period, when the decrease in battery temperature within a preset time period is less than or equal to the first temperature threshold, the control module sends a resume charging command to the wireless power transmitter.

[0011] According to the electronic device of the present invention, the charging process of the electronic device includes multiple charging cycles, wherein a charging cycle refers to the period from the start of charging to the pause of charging and then to the resumption of charging.

[0012] According to the electronic device of the present invention, the control module is further configured to acquire the battery temperature change curve during the pause charging period in the first charging cycle, and calculate the sampling point with the largest slope change in the temperature change curve, and use the battery temperature corresponding to the sampling point as the second temperature threshold.

[0013] The control module is also used to send a pause charging command to the wireless power transmitter in each charging cycle after the first charging cycle when the battery temperature is greater than or equal to the temperature protection threshold, and to send a resume charging command to the wireless power transmitter when the battery temperature is less than or equal to the second temperature threshold during the pause charging period.

[0014] According to the electronic device of the present invention, the control module is further configured to acquire the battery temperature change curve during the pause charging period in the first charging cycle, calculate the sampling point with the largest slope change in the temperature change curve, and take the time from issuing the pause charging command to the sampling point as the battery cooling time.

[0015] The control module is also used to send a pause charging command to the wireless power transmitter in each charging cycle after the first charging cycle when the battery temperature is greater than or equal to the temperature protection threshold, and to send a resume charging command to the wireless power transmitter after the pause charging time reaches the battery cooling time.

[0016] According to the electronic device of the present invention, the control module is further configured to send a stop charging command to the wireless power transmitting device when the battery is fully charged.

[0017] The present invention also provides a wireless charging method, the method comprising:

[0018] Electronic devices collect battery temperature during charging;

[0019] When the battery temperature is greater than or equal to the temperature protection threshold, the electronic device sends a pause charging command to the wireless power transmitter.

[0020] During the charging pause, when the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the electronic device sends a recharge command to the wireless power transmitter.

[0021] According to the wireless charging method of the present invention, the charging process of the electronic device includes multiple charging cycles, wherein a charging cycle refers to the period from the start of charging to the pause of charging and then to the resumption of charging.

[0022] According to the wireless charging method of the present invention, the method further includes: the electronic device acquiring the battery temperature change curve during the pause charging period in the first charging cycle, and calculating the sampling point with the largest slope change in the temperature change curve, and using the battery temperature corresponding to the sampling point as a second temperature threshold.

[0023] In each charging cycle after the first charging cycle, the electronic device sends a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold, and sends a resume charging command to the wireless power transmitter when the battery temperature is less than or equal to the second temperature threshold during the pause charging period.

[0024] The wireless charging method according to the present invention further includes:

[0025] The electronic device acquires the battery temperature change curve during the pause charging period in the first charging cycle, calculates the sampling point with the largest slope change in the temperature change curve, and obtains the time from the issuance of the pause charging command to the sampling point as the battery cooling time.

[0026] In each charging cycle after the first charging cycle, the electronic device sends a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold, and sends a resume charging command to the wireless power transmitter after the pause charging time reaches the battery cooling time.

[0027] The wireless charging method according to the present invention further includes:

[0028] When the battery is fully charged, the electronic device sends a stop charging command to the wireless power transmitter.

[0029] In this embodiment, the charging circuit of the electronic device charges the battery based on the power received by the wireless power receiving circuit. A temperature sensor collects the battery temperature in real time during the charging process. When the battery temperature exceeds or exceeds a temperature protection threshold, the control module sends a pause charging command to the wireless power transmitting device, thereby avoiding safety issues caused by excessively high battery temperatures. Furthermore, during the pause charging period, if the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the control module sends a resume charging command to the wireless power transmitting device. During the pause charging, the battery will cool naturally, and its temperature will decrease. Since the temperature drop per unit time decreases gradually during natural cooling, to improve charging efficiency, this invention sets a threshold for the battery temperature decrease per unit time (the first temperature threshold). If the battery temperature decreases by less than this first temperature threshold within a unit time, charging will restart, thereby avoiding excessively long waiting times after a pause charging, improving charging efficiency, and reducing charging time. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a block diagram of an electronic device provided in one embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram illustrating the temperature changes of a battery during wireless charging of an electronic device in existing technologies.

[0033] Figure 3 This is a schematic diagram illustrating the temperature change of a battery during wireless charging of an electronic device according to an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of battery temperature changes during wireless charging of an electronic device according to another embodiment of the present invention;

[0035] Figure 5 This is a flowchart of an application embodiment of the wireless charging method for electronic devices provided by the present invention;

[0036] Figure 6 This is a flowchart of another application embodiment of the wireless charging method for electronic devices provided by the present invention;

[0037] Figure 7 This is a flowchart of a wireless charging method provided in an embodiment of the present invention;

[0038] Figure 8 This is a flowchart of another wireless charging method provided in an embodiment of the present invention;

[0039] Figure 9 This is a flowchart of another wireless charging method provided in an embodiment of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that 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 process, method, article, or apparatus. Unless otherwise specified, 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.

[0043] The wireless power transmitter is configured to wirelessly charge electronic devices via magnetic induction. The transmitter can be a charging dock or a charging platform compatible with the electronic device. The electronic device can be any device including a receiving coil, such as a smartwatch or smartphone. During charging, the transmitting coil of the wireless power transmitter and the receiving coil of the electronic device are overlapped and aligned. The transmitting coil converts a high-frequency AC signal into a magnetic field, which the receiving coil of the electronic device then converts into electrical energy after sensing the magnetic field. This electrical energy is then rectified and filtered before being used to charge the battery.

[0044] Figure 1 This is a block diagram of an electronic device provided in one embodiment of the present invention. The electronic device 100 includes a battery 10, a receiving coil 20, a wireless power receiving circuit 30, a charging circuit 40, a temperature sensor 50, and a control module 60.

[0045] The wireless power receiving circuit 30 is connected to the receiving coil 20 and is used to receive power from the wireless power transmitting device and transmit the power to the charging circuit 40. The wireless power receiving circuit 30 may include at least an AC-DC conversion circuit, which is used to convert AC power into DC power that can be supplied to the battery 10.

[0046] The charging circuit 40 is used to charge the battery 10 based on the power received by the wireless power receiving circuit 30. The charging circuit 40 is used to control parameters such as current and voltage during the charging process according to the instructions of the control module 60, such as constant voltage charging, constant current charging, eddy current charging, etc., for the battery 10.

[0047] Temperature sensor 50 is used to acquire the temperature of battery 10. This temperature sensor 50 can be an NTC (Negative Temperature Coefficient) thermistor that is in close contact with battery 10. When the temperature of battery 10 changes, the resistance value of the NTC thermistor will change, so the temperature of battery 10 can be obtained by measuring its resistance value.

[0048] The control module 60 is used to send a pause charging command to the wireless power transmitter when the temperature of the battery 10 is greater than or equal to a temperature protection threshold during charging. Furthermore, during the pause charging period, if the temperature drop of the battery 10 within a preset time period is less than or equal to a first temperature threshold, the control module 60 sends a resume charging command to the wireless power transmitter. The electronic device 100 can communicate with the wireless power transmitter, for example, using a wireless charging standard communication protocol, such as the Qi standard or the PMA standard, thereby enabling the electronic device 100 to control the transmission power and transmission status of the wireless power transmitter.

[0049] In this embodiment, the charging circuit 40 of the electronic device 100 charges the battery 10 based on the power received by the wireless power receiving circuit 30. The temperature sensor 50 collects the temperature of the battery 10 in real time during the charging process. When the temperature of the battery 10 exceeds or exceeds the temperature protection threshold, the control module 60 sends a pause charging command to the wireless power transmitting device, thereby avoiding safety issues caused by excessively high battery temperatures. The temperature protection threshold is a battery temperature protection threshold, typically a fixed value provided by the battery manufacturer. To avoid damaging the battery 10, charging is paused when the battery temperature reaches this threshold. After the wireless power transmitting device pauses charging, the battery 10 cools naturally, and its temperature decreases. Once the battery temperature drops to a certain level, the wireless power transmitting device can resume charging. When the battery 10 is fully charged, the control module 60 also sends a stop charging command to the wireless power transmitting device.

[0050] In existing technologies, a high temperature threshold and a low temperature threshold are typically set. When the battery rises to the high temperature threshold, charging is paused. When the battery cools down to the low temperature threshold, the wireless power transmission device recharges the battery. Figure 2This is a schematic diagram illustrating the battery temperature changes during wireless charging of an electronic device 100 in the prior art. For example... Figure 2 As shown, during battery charging, the battery temperature initially rises rapidly, then slows down after reaching a certain temperature, eventually reaching a high temperature threshold (such as...). Figure 2 When the temperature reaches 50 degrees Celsius (as shown), the wireless power transmitting equipment stops charging, and the battery of electronic device 100 cools naturally. The battery temperature first decreases rapidly, and then decreases slowly until it reaches the low temperature threshold (e.g., 50 degrees Celsius). Figure 2 At 38 degrees Celsius (as shown), the wireless power transmitter restarts to recharge the battery. It can be seen that during charging pauses, the battery temperature first cools rapidly (rapid change zone), then cools slowly (slow change zone). Affected by environmental factors such as weather and season, the temperature change curve during battery cooling varies depending on the ambient temperature. If the low-temperature threshold is set too low, in high-temperature environments, the battery may not cool down to that threshold for a long time, or the battery temperature may not cool down to that threshold at all, thus preventing the battery from completing charging. If the low-temperature threshold is set too high, the battery cools down rapidly to that threshold, and then the wireless power transmitter is immediately turned on again after a short cooling period. The battery is then rapidly heated to the high-temperature threshold, causing charging to pause again, resulting in an excessively short charging time, also preventing fast charging.

[0051] Considering that the battery temperature cools rapidly initially and then slowly during natural cooling, this embodiment does not set a fixed low-temperature threshold. Instead, it sets a threshold for the temperature drop of the battery per unit time. That is, when the temperature drop of the battery within a preset time period is less than or equal to a first temperature threshold, the wireless power transmission device can be controlled to recharge the battery.

[0052] Figure 3 This is a schematic diagram illustrating the battery temperature change during wireless charging of an electronic device 100 according to an embodiment of the present invention. Figure 3 The charging process of electronic device 100 includes multiple charging cycles. Figure 3 The diagram only shows six charging cycles (T1-T6), but the actual charging process of electronic device 100 can include more than one charging cycle. A charging cycle refers to the period from the start of charging to the pause of charging and then to the resumption of charging. That is, the process from the start of charging of electronic device 100, to the pause of charging when the battery reaches the high-temperature protection threshold, and then to the resumption of charging when the battery temperature drops to a preset threshold, is called one charging cycle. Figure 3In this embodiment, during each charging cycle, the electronic device 100 starts charging until the battery temperature reaches the temperature protection threshold (50 degrees Celsius), then pauses charging and allows the battery to cool naturally. If the battery temperature drops below 0.5 degrees Celsius within 30 seconds, the wireless power transmitter restarts charging. When charging is paused, the battery cools rapidly first, then slowly, with the temperature decrease becoming less over the same time period. Therefore, a threshold for the battery temperature decrease within a preset time period can be established. When the battery temperature decreases by less than or equal to this threshold within the preset time period, the wireless power transmitter restarts charging. This avoids prolonged waiting for the battery to cool down, thereby shortening the charging time, improving charging efficiency, and is unaffected by ambient temperature. In this embodiment, the condition for the electronic device 100 to send a resumption charging command is set to the battery temperature dropping below 0.5 degrees Celsius within 30 seconds; alternatively, it can be set to a temperature decrease of 1 degree Celsius within 1 minute. Since the electronic device 100 samples the battery temperature periodically, the preset time period can be set to equal one or more battery temperature sampling cycles. For example, if the battery temperature sampling cycle of the electronic device 100 is 5 seconds, a battery cooling threshold can be preset within 5 seconds, or within 10 seconds, 15 seconds, or 20 seconds. Compared to existing technologies, this embodiment does not set a fixed low-temperature threshold for recharging, but instead sets the temperature drop within a preset time period. This avoids the problems of not being able to complete fast charging or reach the low-temperature threshold due to setting the low-temperature threshold too high or too low, which is beneficial for improving charging efficiency.

[0053] Figure 4 This is a schematic diagram illustrating the battery temperature change during wireless charging of an electronic device 100 according to another embodiment of the present invention. In this embodiment, the control module is further configured to acquire the battery temperature change curve during the pause charging period in the first charging cycle, and calculate the sampling point with the largest slope change in the temperature change curve, using the battery temperature corresponding to the sampling point as a second temperature threshold. Furthermore, the control module is also configured to, in each charging cycle after the first charging cycle, send a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold, and send a resume charging command to the wireless power transmitter when the battery temperature during the pause charging period is less than or equal to the second temperature threshold. Figure 4 As shown, in the first charging cycle (T1), the threshold for battery recharging can be adopted as follows: Figure 3The threshold condition shown is that the temperature cools down to less than 0.5 degrees Celsius within 30 seconds. At the end of the first charging cycle (T1), the control module acquires the battery temperature change curve during the pause charging period in the first charging cycle and calculates the sampling point with the largest slope change in the temperature change curve. The point with the largest slope is identified as point X, and its corresponding battery temperature is 43.2 degrees Celsius. In each charging cycle (T2, T3, T4, etc.) after the first charging cycle (T1), the battery temperature threshold for resuming charging is set to 43.2 degrees Celsius. When the battery temperature sampled by the electronic device 100 is less than or equal to 43.2 degrees Celsius, the control module sends a resume charging command to the wireless power transmitter. The control module is also used to send a pause charging command to the wireless power transmitter in each charging cycle after the first charging cycle when the battery temperature is greater than or equal to the temperature protection threshold, and to send a resume charging command to the wireless power transmitter when the battery temperature during the pause charging period is less than or equal to a second temperature threshold.

[0054] The sampling point with the largest slope change is calculated as follows: if the difference between the slope of a sampling point and the previous sampling point is the largest among all sampling points, then that sampling point is the sampling point with the largest slope change; or, the slope of the first straight line formed by a sampling point and the previous sampling point, and the slope of the second straight line formed by the sampling point and the next sampling point are obtained, and the difference between the slopes of the first and second lines is calculated. If the difference between the slopes of the first and second lines corresponding to a sampling point is the largest among all sampling points, then that sampling point is the sampling point with the largest slope change. This embodiment uses the sampling point with the largest slope change to identify the sampling point where the temperature changes abruptly during battery cooling. After this abrupt change, the battery temperature decreases more slowly. Therefore, in subsequent charging cycles, when the battery temperature cools to the temperature corresponding to this abrupt change, a recharge command is sent to the wireless power transmission device. This maximizes the use of the rapid temperature change zone during battery cooling, allowing charging to resume immediately after the rapid cooling process ends, avoiding long waiting times for battery cooling, thus shortening charging time and improving charging efficiency.

[0055] In some embodiments, the control module is further configured to acquire the battery temperature change curve during the pause charging period in the first charging cycle, calculate the sampling point with the largest slope change in the temperature change curve, and use the time from issuing the pause charging command to the sampling point as the battery cooling time. Furthermore, the control module is further configured to send a pause charging command to the wireless power transmission device in each charging cycle after the first charging cycle when the battery temperature is greater than or equal to the temperature protection threshold, and send a resume charging command to the wireless power transmission device after the pause charging time reaches the battery cooling time. This can be referred to concurrently. Figure 4In the first charging cycle (T1), the threshold for battery recharging can be determined as follows: Figure 3 The threshold condition shown is that the temperature cools to less than 0.5 degrees Celsius within 30 seconds. At the end of the first charging cycle (T1), the control module acquires the battery temperature change curve during the pause charging period in the first charging cycle and calculates the sampling point with the largest slope change in the temperature change curve. The point with the largest slope is calculated as point X. The time between the electronic device 100 issuing the pause charging command and sampling point X in the charging cycle is t1. In each charging cycle (T2, T3, T4, etc.) after the first charging cycle (T1), when the battery temperature reaches the temperature protection threshold due to charging, the control module issues a pause charging command. When the pause charging time reaches t1, the control module sends a resume charging command to the wireless power transmission device. Since the ambient temperature remains basically constant during a single charging process, the temperature change during battery cooling is basically the same. In this embodiment, the sampling point with the largest slope change is used to identify the temperature abrupt change point in the temperature change curve during battery cooling. The time required for the battery to cool from the battery temperature protection threshold to the temperature at this temperature abrupt change sampling point is calculated as the battery cooling time. In subsequent charging cycles, after the control module issues a pause charging command, a resume charging command is sent to the wireless power transmission device to request resumption of charging after the pause charging time reaches the battery cooling time. Therefore, during battery cooling, there is no need to constantly monitor the battery temperature; resuming charging only requires requesting resumption of charging upon reaching the battery cooling time. This helps reduce power consumption, allows the battery to cool down faster, and maximizes the utilization of the rapid change zone during battery cooling. Resuming charging immediately after the rapid cooling of the battery avoids long waiting times for battery cooling, thereby shortening battery charging time and improving charging efficiency.

[0056] Figure 5 This is a flowchart of an application embodiment of the wireless charging method for electronic devices provided by the present invention. The method includes:

[0057] Step S501: The electronic device begins wireless charging.

[0058] In step S502, the temperature sensor of the electronic device detects the temperature of the battery.

[0059] Step S503: Check if the battery temperature is greater than or equal to the temperature protection threshold. This temperature protection threshold is the battery's temperature protection threshold. If yes, proceed to step S504; otherwise, continue with step S503.

[0060] In step S504, the electronic device sends a pause charging command to the wireless power transmitting device.

[0061] In step S505, the wireless power transmission equipment suspends power transmission.

[0062] Step S506: The electronic device determines whether it is the first charging cycle. A charging cycle refers to the period from the start of charging to the pause and then the resumption of charging; the charging process of the electronic device may include multiple charging cycles. If yes, proceed to step S507; otherwise, proceed to step S508.

[0063] Specifically, the electronic device can record the number of times charging is paused. If it is the first time charging is paused, then it is the first charging cycle. The electronic device can also determine whether it is the first charging cycle based on whether the following second temperature threshold is stored. The second temperature threshold is the battery temperature corresponding to the sampling point with the largest slope change in the battery temperature change curve during the pause in charging in the first charging cycle.

[0064] In step S507, the electronic device determines that the decrease in battery temperature within a preset time period is less than or equal to a first temperature threshold. If so, proceed to step S509; otherwise, continue executing step S507.

[0065] In step S508, the electronic device determines whether the battery temperature is less than or equal to the second temperature threshold. If yes, proceed to step S510; otherwise, continue with step S508.

[0066] Step S509: The electronic device acquires the battery temperature change curve during the pause in charging during the first charging cycle, calculates the sampling point with the largest slope change in the battery temperature change curve during the pause in charging, and saves the battery temperature corresponding to the sampling point as the second temperature threshold. Then proceed to step S510.

[0067] In step S510, the electronic device sends a resumption charging command to the wireless power transmitter. In the first charging cycle, steps S509 and S510 can be performed simultaneously. That is, while the electronic device sends the resumption charging command to the wireless power transmitter, it calculates the sampling point with the largest slope change in the battery temperature change curve during the charging pause period and saves the battery temperature corresponding to the sampling point as a second temperature threshold.

[0068] In step S511, the wireless power transmitting equipment resumes power transmission. Then return to step S503.

[0069] During battery charging, the electronic device continuously checks whether the battery is fully charged. If the battery is fully charged, the electronic device sends a stop charging command to the wireless power transmitting device.

[0070] Figure 6 This is a flowchart of another application embodiment of the wireless charging method for electronic devices provided by the present invention. The method includes:

[0071] Step S601: The electronic device begins wireless charging.

[0072] In step S602, the temperature sensor of the electronic device detects the temperature of the battery.

[0073] Step S603: Check if the battery temperature is greater than or equal to the temperature protection threshold. This temperature protection threshold is the battery's temperature protection threshold. If yes, proceed to step S604; otherwise, continue the judgment process.

[0074] In step S604, the electronic device sends a pause charging command to the wireless power transmitting device.

[0075] In step S605, the wireless power transmission equipment suspends power transmission.

[0076] Step S606: The electronic device determines whether it is the first charging cycle. A charging cycle refers to the period from the start of charging to the pause and resumption of charging; the charging process of the electronic device may include multiple charging cycles. If yes, proceed to step S607; otherwise, proceed to step S608.

[0077] Specifically, the electronic device can record the number of times charging is paused. If it is the first time charging is paused, then it is the first charging cycle. The electronic device can also determine whether it is the first charging cycle based on whether the following battery cooling time is stored. The battery cooling time is the time between the sampling point where the slope of the battery temperature change curve changes most during the period from issuing the pause charging command to the pause charging, during the first charging cycle. The battery cooling time is obtained and stored in the electronic device during the first charging cycle.

[0078] In step S607, the electronic device determines that the decrease in battery temperature within a preset time period is less than or equal to a first temperature threshold. If so, proceed to step S609; otherwise, continue executing step S607.

[0079] In step S608, the electronic device determines whether the pause charging time has reached the battery cooling time. If yes, proceed to step S610; otherwise, continue with step S608.

[0080] In step S609, the electronic device acquires the battery temperature change curve during the pause in charging during the first charging cycle, calculates the sampling point with the largest slope change in the battery temperature change curve during the pause, and acquires the time between issuing the pause charging command and the sampling point. This time is recorded as the battery cooling time for subsequent charging cycles. Then, proceed to step S810.

[0081] In step S610, the electronic device sends a resumption charging command to the wireless power transmitter. During the first charging cycle, steps S610 and S609 can be performed simultaneously. That is, while the electronic device sends the resumption charging command to the wireless power transmitter, it calculates the sampling point with the largest slope change in the battery temperature change curve during the charging pause period and saves the battery temperature corresponding to the sampling point as a second temperature threshold.

[0082] In step S611, the wireless power transmitting equipment resumes power transmission. Then return to step S603.

[0083] During battery charging, the electronic device continuously checks whether the battery is fully charged. If the battery is fully charged, the electronic device sends a stop charging command to the wireless power transmitting device.

[0084] Figure 7 This is a flowchart of a wireless charging method provided in an embodiment of the present invention. This wireless charging method is applied to, for example... Figure 1 In the electronic device shown, wireless charging methods include:

[0085] S701: Electronic devices collect battery temperature during charging.

[0086] S702: When the battery temperature is greater than or equal to the temperature protection threshold, the electronic device sends a pause charging command to the wireless power transmitter.

[0087] S703, during a charging pause, when the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the electronic device sends a resumption charging command to the wireless power transmission device. The charging process of the electronic device may include multiple charging cycles, where a charging cycle refers to the period from the start of charging to the pause of charging and then to the resumption of charging.

[0088] In some embodiments, the wireless charging method further includes: when the battery is fully charged, the electronic device sends a stop charging command to the wireless power transmitting device.

[0089] Figure 8 This is a flowchart of another wireless charging method provided in an embodiment of the present invention. This wireless charging method is applied to, for example... Figure 1 In the electronic device shown, wireless charging methods include:

[0090] S801: Electronic devices collect battery temperature during charging.

[0091] S802: When the battery temperature is greater than or equal to the temperature protection threshold, the electronic device sends a pause charging command to the wireless power transmitter.

[0092] S803, during the charging pause period, when the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the electronic device sends a resumption charging command to the wireless power transmission device. The charging process of the electronic device may include multiple charging cycles, where a charging cycle refers to the period from the start of charging to the pause of charging and then to the resumption of charging.

[0093] S804, the electronic device acquires the battery temperature change curve during the pause in charging in the first charging cycle, calculates the sampling point with the largest slope change in the temperature change curve, and uses the battery temperature corresponding to the sampling point as the second temperature threshold.

[0094] S805, in each charging cycle after the first charging cycle, the electronic device sends a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to a temperature protection threshold, and sends a resume charging command to the wireless power transmitter when the battery temperature is less than or equal to a second temperature threshold during the pause charging period.

[0095] Figure 9 This is a flowchart of another wireless charging method provided in an embodiment of the present invention. This wireless charging method is applied to, for example... Figure 1 In the electronic device shown, wireless charging methods include:

[0096] S901: Electronic devices collect battery temperature during charging.

[0097] S902: When the battery temperature is greater than or equal to the temperature protection threshold, the electronic device sends a pause charging command to the wireless power transmission device.

[0098] S903, during the charging pause period, when the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the electronic device sends a resumption charging command to the wireless power transmission device. The charging process of the electronic device may include multiple charging cycles, where a charging cycle refers to the period from the start of charging to the pause of charging and then to the resumption of charging.

[0099] S904, the electronic device acquires the battery temperature change curve during the pause charging period in the first charging cycle, calculates the sampling point with the largest slope change in the temperature change curve, and obtains the time from issuing the pause charging command to the sampling point as the battery cooling time.

[0100] S905: In each charging cycle after the first charging cycle, the electronic device sends a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold, and sends a resume charging command to the wireless power transmitter after the pause charging time reaches the battery cooling time.

[0101] In summary, in this embodiment, the charging circuit of the electronic device charges the battery based on the power received by the wireless power receiving circuit. A temperature sensor collects the battery temperature in real time during the charging process. When the battery temperature exceeds or exceeds a temperature protection threshold, the control module sends a pause charging command to the wireless power transmitting device, thereby avoiding safety issues caused by excessively high battery temperatures. Furthermore, during the pause charging period, if the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the control module sends a resume charging command to the wireless power transmitting device. During the pause charging, the battery will cool naturally, and its temperature will decrease. Since the temperature drop per unit time decreases gradually during natural cooling, this invention sets a threshold for the battery temperature decrease per unit time (the first temperature threshold) to improve charging efficiency. If the battery temperature decreases by less than this first temperature threshold within a unit time, charging will restart, thereby avoiding excessively long waiting times after a pause charging, improving charging efficiency, and reducing charging time.

[0102] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0103] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0104] If the functionality is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0105] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electronic device, the electronic device comprising: Battery; Wireless power receiving circuit, used to receive power from wireless power transmitting equipment; A charging circuit for charging the battery based on the power received by the wireless power receiving circuit; A temperature sensor is used to collect the temperature of the battery; The control module is used to send a pause charging command to the wireless power transmission device when the battery temperature is greater than or equal to the temperature protection threshold during charging. Furthermore, during the charging pause, when the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the control module sends a recharge command to the wireless power transmitting device. The charging process of the electronic device includes multiple charging cycles, which refer to the period from the start of charging to the pause of charging and then to the resumption of charging. The control module is also used to acquire the battery temperature change curve during the pause charging period in the first charging cycle, calculate the sampling point with the largest slope change in the temperature change curve, and take the time from the issuance of the pause charging command to the sampling point as the battery cooling time. The control module is also configured to send a pause charging command to the wireless power transmitter in each charging cycle after the first charging cycle when the battery temperature is greater than or equal to the temperature protection threshold, and send a resume charging command to the wireless power transmitter after the pause charging time reaches the battery cooling time.

2. The electronic device according to claim 1, characterized in that, The control module is also used to obtain the battery temperature change curve during the pause charging period in the first charging cycle, and calculate the sampling point with the largest slope change in the temperature change curve, and use the battery temperature corresponding to the sampling point as the second temperature threshold. The control module is also configured to send a pause charging command to the wireless power transmitter in each charging cycle after the first charging cycle when the battery temperature is greater than or equal to the temperature protection threshold, and send a resume charging command to the wireless power transmitter when the battery temperature is less than or equal to the second temperature threshold during the pause charging period.

3. The electronic device according to claim 1, characterized in that, The control module is also used to send a stop charging command to the wireless power transmitting device when the battery is fully charged.

4. A wireless charging method, characterized in that, The method includes: Electronic devices collect battery temperature during charging; When the battery temperature is greater than or equal to the temperature protection threshold, the electronic device sends a pause charging command to the wireless power transmitting device; During the charging pause, when the battery temperature decreases by less than or equal to a first temperature threshold within a preset time period, the electronic device sends a charging resumption command to the wireless power transmitting device. The charging process of the electronic device includes multiple charging cycles, which refer to the period from the start of charging to the pause of charging and then to the resumption of charging. The electronic device acquires the battery temperature change curve during the pause charging period in the first charging cycle, calculates the sampling point with the largest slope change in the temperature change curve, and obtains the time from the issuance of the pause charging command to the sampling point as the battery cooling time. In each charging cycle after the first charging cycle, the electronic device sends a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold, and sends a resume charging command to the wireless power transmitter after the pause charging time reaches the battery cooling time.

5. The wireless charging method according to claim 4, characterized in that, The method further includes: The electronic device acquires the battery temperature change curve during the pause in charging in the first charging cycle, and calculates the sampling point with the largest slope change in the temperature change curve, and uses the battery temperature corresponding to the sampling point as the second temperature threshold. In each charging cycle after the first charging cycle, the electronic device sends a pause charging command to the wireless power transmitter when the battery temperature is greater than or equal to the temperature protection threshold, and sends a resume charging command to the wireless power transmitter when the battery temperature is less than or equal to the second temperature threshold during the pause charging period.

6. The wireless charging method according to claim 4, characterized in that, The method further includes: When the battery is fully charged, the electronic device sends a stop charging command to the wireless power transmitting device.

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