Battery heating apparatus, method and related device

Abstract

Provided in the embodiments of the present application are a battery heating apparatus, a method and a related device. The battery heating apparatus comprises: a first coil, used for wirelessly charging a battery; a first magnetic conduction unit, the first magnetic conduction unit being located on the side of the first coil facing the battery; and a second coil, the second coil being located on the side of the first magnetic conduction unit facing the battery. The battery heating apparatus is used for generating an alternating magnetic field so as to heat the battery. In this way, in low-temperature scenarios, the battery heating apparatus can generate an alternating magnetic field to cause batteries to produce eddy current loss, so as to heat the batteries, thereby extending the battery life of the batteries.

Description

Battery heating apparatus, method, and related devices TECHNICAL FIELD

[0001] The present application relates to the technical field of terminals, and in particular to a battery heating apparatus, method, and related devices. BACKGROUND

[0002] A battery can be provided in an electronic device, and the battery can be used to store and provide electric energy. For example, the electronic device can charge the battery through a power supply; the electronic device can also use the battery to provide power to support the electronic device to run multiple services, such as making a phone call, taking a photo, and the like; and the electronic device can also use the battery to charge other devices.

[0003] However, in a possible implementation, the endurance of the battery in the electronic device is poor. For example, in a low-temperature scenario, the charging performance and discharging performance of the battery are both reduced; the power consumption of the electronic device increases, and the charging speed is slow; and the battery cannot provide power to the electronic device for a long time, which affects the user experience.

[0004] SUMMARY

[0005] Embodiments of the present application provide a battery heating apparatus, method, and related devices, applied to the technical field of terminals, and in a low-temperature environment, an alternating magnetic field is generated by a coil to heat a battery, thereby improving the endurance of the battery.

[0006] In a first aspect, embodiments of the present application provide a battery (which can correspond to the battery 102) heating apparatus. The method includes: a first coil (which can correspond to the coil 105) for wirelessly charging the battery; a first magnetic conduction unit (which can correspond to the magnetic conduction unit 104), the first magnetic conduction unit being located on a side of the first coil facing the battery; a second coil (which can correspond to the coil 501), the second coil being located on a side of the first magnetic conduction unit facing the battery; and the second coil is used to generate an alternating magnetic field to heat the battery.

[0007] The structure can refer to the related description in the embodiments shown in FIGS. 5A to 6. For example, on both sides of the magnetic conduction unit 104, there are coils, namely the coil 105 and the coil 501; the materials and the number of turns of the coil 105 and the coil 501 can be different. The coil 105, the magnetic conduction unit 104, and the coil 501 can be combined into a coil module, or can be used separately. Taking the form of the battery heating apparatus as a coil module as an example, the coil 105 in the coil module is located on a side away from the battery 102, and the coil 501 is located on a side close to the battery 102. The magnetic conduction unit 104 can shield and guide the magnetic circuit to reduce the mutual influence between the coil 105 and the coil 501.

[0008] The alternating magnetic field of coil 501 can generate a first electromagnetic signal or a third electromagnetic signal. The first electromagnetic signal is generated by coil 501 based on a first AC signal, and the third electromagnetic signal is generated by coil 501 based on a second AC signal. The first AC signal is obtained by converting the DC signal from battery 102 and / or an external power source, and the second AC signal is obtained by coil 105 receiving electromagnetic signals from other coils (such as a third coil) during wireless charging. This will be explained in detail later and will not be repeated here.

[0009] In this way, in low-temperature scenarios, the battery heating device can generate an alternating magnetic field, causing eddy current losses in the battery, thereby heating the battery and improving its range.

[0010] Optionally, the battery includes a metal outer layer (e.g., a barrier layer 2013 in the aluminum-plastic film 201); the metal outer layer is used to sense electromagnetic signals from the second coil and generate eddy current losses to heat the battery.

[0011] In this way, the inclusion of metal materials in the battery enables it to generate eddy current losses under an alternating magnetic field, thereby achieving heating of the battery.

[0012] Optionally, the battery heating device further includes: a first chip (which may correspond to the wireless transceiver chip 305, or also referred to as a TRX chip), the first chip being connected to the second coil, for receiving a first DC signal and converting the first DC signal into a first AC signal when heating the battery, and inputting the first AC signal into the second coil; the second coil is also used to receive the first AC signal and generate a first electromagnetic signal.

[0013] This structure corresponds to the embodiment shown in Figure 10 or Figure 13. In this embodiment, the wireless transceiver chip 305 is connected to the coil 501. When the battery 102 is heated, the wireless transceiver chip 305 receives a first DC signal (as shown in Figure 10, the battery 102 provides the DC signal; or as shown in Figure 13, the power supply 1301 provides the DC signal). The wireless transceiver chip 305 supports DC-to-AC conversion, thereby converting the first DC signal into a first AC signal. The coil 501 generates a first electromagnetic signal based on the first AC signal, causing the battery 102 to sense the first electromagnetic signal and thus heat the battery 102.

[0014] In this way, the battery heating device can be connected to the second coil through the first chip, so that the second coil generates the first electromagnetic signal, and the battery generates eddy current loss, thereby heating the battery and improving the battery's range.

[0015] Optionally, the battery heating device may also include a battery (corresponding to battery 102), which is connected to the first chip and is used to input a first DC signal to the first chip.

[0016] This structure corresponds to the embodiment shown in Figure 10. Thus, in low-temperature environments, the battery heating device can use battery 102 to provide electrical energy to coil 501, causing the second coil to generate a first electromagnetic signal.

[0017] Optionally, the battery heating device also includes an external power supply (which may correspond to power supply 1301), which is connected to the first chip and is used to input a first DC signal to the first chip.

[0018] This structure corresponds to the embodiments shown in Figures 12 and 13. Thus, in low-temperature and wired charging environments, the battery heating device can use power supply 1301 to provide power to coil 501, enabling the second coil to generate a first electromagnetic signal; simultaneously, it can also reduce the power consumption of battery 102, further extending the battery's range.

[0019] Optionally, the battery heating device further includes a first chip connected to a first coil; the first coil is specifically used to receive a second electromagnetic signal and generate a second AC signal when wirelessly charging the battery; the first chip is also used to convert the second AC signal into a second DC signal and input the second DC signal to the battery.

[0020] This structure can correspond to Figure 4, Figure 6b, or the embodiment shown in Figure 10. In a wireless charging scenario, the wireless transceiver chip 305 is connected to the coil 105. The coil 105 can receive a second electromagnetic signal from the wireless charging device 200 and generate a second AC signal; the wireless transceiver chip 305 can support AC-to-DC conversion, thereby converting the second AC signal into a second DC signal. The battery 102 receives the second DC signal.

[0021] It should be noted that the first or third electromagnetic signal is used to heat the battery, while the second electromagnetic signal is used to wirelessly charge battery 102; therefore, the various signals associated with the first or third electromagnetic signal and the various signals associated with the second electromagnetic signal are different. For example, the voltage, current, and other parameters of the first DC signal are different from those of the second DC signal, the frequency of the first AC signal is different from that of the second AC signal, and so on.

[0022] In this way, after the battery heating device is connected, coil 501 will not affect the wireless charging function of coil 105, so that the battery heating device can realize the battery heating solution while maintaining the wireless charging function.

[0023] Optionally, the second coil is connected to the first chip and in parallel with the first coil, specifically used to receive a second AC signal and generate a third electromagnetic signal in the case of heating the battery and wireless charging.

[0024] This structure corresponds to the embodiments shown in Figures 14 and 15. It is understood that in the wireless charging and battery heating scenario, coil 105 can sense the second electromagnetic signal from the wireless charging device 200 and generate a second AC signal. The second coil is connected to the first chip and is connected in parallel with the first coil; thus, the second AC signal generated by coil 105 can act on coil 501 based on this connection, providing power to coil 501, thereby enabling coil 501 to generate a third electromagnetic signal.

[0025] Optionally, the battery heating device further includes: a first switching unit (which may correspond to switching unit Q1 1002), the first switching unit being disposed between the first chip and the first coil; and a second switching unit (which may correspond to switching unit Q2 1004), the second switching unit being disposed between the first chip and the second coil; wherein, during the process of heating the battery and when the battery is not being charged, the first switching unit is in an open state and the second switching unit is in a closed state; or, during the process of heating the battery and wired charging, the first switching unit is in an open state and the second switching unit is in a closed state; or, during the process of not heating the battery and wirelessly charging the battery, the first switching unit is in a closed state and the second switching unit is in an open state; or, during the process of heating the battery and wirelessly charging, the first switching unit is in a closed state and the second switching unit is in a closed state.

[0026] It is understood that the battery heating device may include a switching unit Q1 1002 and a switching unit Q1 1002; the on and off of these two switching units can be controlled to achieve different functions.

[0027] Specifically, referring to Figure 10, when switch unit Q1 1002 is open or closed, the wireless transceiver chip 305 is connected to coil 501, enabling battery heating based on coil 501. When switch unit Q1 1002 is closed or open, the wireless transceiver chip 305 is connected to coil 105, enabling wireless charging based on coil 105. When switch unit Q1 1002 is closed or closed, the wireless transceiver chip 305 is simultaneously connected to both coil 105 and coil 501, enabling both wireless charging and battery heating based on coil 105.

[0028] The scenarios for using the battery heating function alone include: heating the battery when it is not charging, and heating the battery while it is being wired charged. The scenarios for using the wireless charging function alone include: wirelessly charging the battery without heating it. The scenarios for using both functions simultaneously include: heating the battery and wireless charging.

[0029] In this way, the battery heating device can flexibly switch between battery heating function and wireless charging function through the switching state of the switching unit Q1 1002, thus enriching the applicable scenarios of the battery heating device.

[0030] Optionally, the first coil includes a first tap (e.g., tap 701); the second coil includes a second tap (e.g., tap 702); the first tap is used to connect the first coil to the first chip; the second tap is used to connect the second coil to the first chip; wherein the first tap and the second tap are connected, or the first tap and the second tap are not connected.

[0031] This structure can correspond to the embodiment shown in Figure 7 or Figure 8. Thus, the first coil and the second coil can be connected to the circuit based on taps 701 and 702; simultaneously, various specific implementations of coil modules are also provided.

[0032] Optionally, the battery heating device further includes: a first graphite layer (which may correspond to graphite layer 103), the first graphite layer being located on the side of the second coil facing the battery.

[0033] This structure corresponds to the embodiments shown in Figures 5A to 6. The graphite layer 103 is located between the coil 501 and the battery 102. In this way, the contact area between the graphite layer 103 and the battery 102 is large, and the graphite layer 103 has good thermal conductivity, which can quickly and evenly transfer the heat generated by the eddy current to the entire battery 102, thereby achieving rapid heating of the battery 102.

[0034] Optionally, a first capacitor (which may correspond to capacitor C1 1003) is also provided between the first coil and the first chip; the first capacitor is used to adjust the frequency of the second AC signal; a second capacitor (which may correspond to capacitor C2 1005) is also provided between the second coil and the first chip; the second capacitor is used to adjust the frequency of the first AC signal; the first capacitor and the second capacitor are different, and the frequency of the first AC signal is different from the frequency of the second AC signal; the frequency of the first AC signal is positively correlated with the heating rate of the battery.

[0035] In this way, the battery heating device can improve the battery's heating efficiency by adjusting the frequency of the first AC signal.

[0036] Secondly, embodiments of this application propose an electronic device, which includes: a first coil, a first magnetically conductive unit, a second coil, and a battery; the first coil is used for wirelessly charging the battery; the first magnetically conductive unit is located on the side of the first coil facing the battery; the second coil is located on the side of the first magnetically conductive unit facing the battery; and is used to generate an alternating magnetic field to heat the battery.

[0037] It is understood that the battery heating device shown in the first aspect can be applied to electronic devices, and the second aspect can be referred to the relevant description in the first aspect.

[0038] In this way, in low-temperature scenarios, electronic devices can generate an alternating magnetic field to cause eddy current losses in the battery, thereby heating the battery and improving its battery life.

[0039] Optionally, the battery includes a metal outer layer; the metal outer layer is used to sense electromagnetic signals from the second coil and generate eddy current losses to heat the battery.

[0040] In this way, the inclusion of metal materials in the battery enables it to generate eddy current losses under an alternating magnetic field, thereby achieving heating of the battery.

[0041] Optionally, the electronic device further includes a first chip; the first chip is connected to the battery and the second coil respectively, and is used to receive a first DC signal when heating the battery, convert the first DC signal into a first AC signal, and input the first AC signal to the second coil; the second coil is specifically used to receive the first AC signal and generate a first electromagnetic signal.

[0042] In this way, the electronic device can be connected to the second coil through the first chip, so that the second coil generates the first electromagnetic signal, and the battery generates eddy current loss, thereby heating the battery and improving the battery's battery life.

[0043] Optionally, a battery is used to input a first DC signal to the first chip when the battery is heated and not charged.

[0044] In this way, in low-temperature environments, the electronic device can use the battery 102 to provide power to the coil 501 so that the second coil generates the first electromagnetic signal.

[0045] Optionally, the electronic device is connected to an external power source. The first chip is used to connect to the external power source and receive a first DC signal input from the external power source when heating the battery or during wired charging.

[0046] In this way, in low-temperature and wired charging environments, electronic devices can use power supply 1301 to provide power to coil 501 so that the second coil generates the first electromagnetic signal; at the same time, it can also reduce the power consumption of battery 102 and further extend the battery's battery life.

[0047] Optionally, the first chip is also connected to the battery and the first coil respectively; the first coil is specifically used to receive the second electromagnetic signal and generate the second AC signal when wirelessly charging the battery; the first chip is also used to convert the second AC signal into a second DC signal and input the second DC signal to the battery.

[0048] In this way, after the coil 501 is connected, the coil 501 will not affect the wireless charging function of the coil 105, so that the battery heating device can realize the battery heating solution while maintaining the wireless charging function.

[0049] Optionally, the second coil is connected to the first chip and in parallel with the first coil, specifically used to receive a second AC signal and generate a third electromagnetic signal in the case of heating the battery and wireless charging.

[0050] In this way, the second AC signal generated by coil 105 can act on coil 501 based on the connection relationship, providing electrical energy to coil 501; so that coil 501 generates a third electromagnetic signal.

[0051] Optionally, the electronic device further includes a processor, a first switching unit disposed between the first chip and the first coil, and a second switching unit disposed between the first chip and the second coil; the processor is configured to control the first switching unit to open and control the second switching unit to close during the process of heating the battery and not charging the battery; or, the processor is further configured to control the first switching unit to open and control the second switching unit to close during the process of heating the battery and wired charging; or, the processor is further configured to control the first switching unit to close and control the second switching unit to open during the process of not heating the battery and wirelessly charging the battery; or, the processor is further configured to control the first switching unit to close and control the second switching unit to close during the process of heating the battery and wireless charging.

[0052] In this way, the electronic device can flexibly switch between battery heating function and wireless charging function through the switching unit Q1 1002 and the switching state of the switching unit Q1 1002, thus enriching the applicable scenarios of the battery heating device.

[0053] Optionally, the first coil includes a first tap; the second coil includes a second tap; the first tap is used to connect the first coil to the first chip; the second tap is used to connect the second coil to the first chip; wherein, the first tap and the second tap are connected, or the first tap and the second tap are not connected.

[0054] In this way, the first coil and the second coil can be connected to the circuit based on taps 701 and 702; at the same time, it also provides specific implementations of various coil modules.

[0055] Optionally, the electronic device further includes a first graphite layer located on the side of the second coil facing the battery. This provides a large contact area between the graphite layer 103 and the battery 102, and the graphite layer 103 has good thermal conductivity, enabling rapid and uniform transfer of heat generated by eddy currents to the entire battery 102, thus achieving rapid heating of the battery 102.

[0056] Optionally, a first capacitor is also provided between the first coil and the first chip; the first capacitor is used to adjust the frequency of the second AC signal; a second capacitor is also provided between the second coil and the first chip; the second capacitor is used to adjust the frequency of the first AC signal; the first capacitor and the second capacitor are different, and the frequency of the first AC signal is different from the frequency of the second AC signal; the frequency of the first AC signal is positively correlated with the heating rate of the battery.

[0057] In this way, the battery heating device can improve the battery's heating efficiency by adjusting the frequency of the first AC signal.

[0058] Optionally, the electronic device also includes a screen (which may correspond to screen 10), a mid-frame (which may correspond to mid-frame 20), and a back cover (which may correspond to back cover 30); the mid-frame is located on the side of the screen facing the battery; and the back cover is located on the side of the first coil away from the first magnetic conductive unit.

[0059] The structure is shown in Figure 5B. Thus, the battery heating device as shown in the first aspect can be applied to electronic devices, with coil 501 positioned close to battery 102 and coil 105 positioned away from battery 102, thereby enabling heating of battery 102 using coil 501.

[0060] Thirdly, embodiments of this application propose a battery heating system, which includes an electronic device and a wireless charging device (which may correspond to wireless charging device 200) as shown in the second aspect; the electronic device includes a first coil, a first chip, a second coil, and a battery, and the wireless charging device is used to wirelessly charge the electronic device; the wireless charging device includes a third coil; the third coil (which may correspond to the transmitting coil 303 of wireless charging device 200) is used to generate a second electromagnetic signal; the first coil is used to receive the second electromagnetic signal and generate a second alternating current signal; the first chip is used to convert the second alternating current signal into a second direct current signal and input the second direct current signal to the battery; the second coil is used to receive the second alternating current signal and generate a third electromagnetic signal when heating the battery.

[0061] The system architecture corresponds to the embodiment shown in Figures 14-15. In this embodiment, after the transmitting coil 303 generates a second electromagnetic signal, the coil 105 senses the second electromagnetic signal and generates a second alternating current (AC) signal. In wireless charging and battery heating scenarios, the wireless transceiver chip 305 can convert a portion of the second AC signal into a second direct current (DC) signal to wirelessly charge the battery 102. The coil 501 can use another portion of the second AC signal for electromagnetic conversion to generate a third electromagnetic signal to heat the battery 102.

[0062] Thus, in scenarios involving wireless charging and battery heating, the alternating current signal generated by coil 105 can supply power to battery 102 and provide power to coil 501, thereby enabling coil 501 to generate an alternating magnetic field to heat battery 102.

[0063] Fourthly, embodiments of this application provide another battery heating device, comprising: a first coil for wirelessly charging a battery; a first magnetically conductive unit located on the side of the first coil facing the battery; and a second coil located on the side of the battery away from the first magnetically conductive unit; for generating an alternating magnetic field to heat the battery.

[0064] This structure may correspond to the embodiment shown in Figure 9A or Figure 9B. In the first aspect, coil 501 and coil 105 are disposed on the same side of battery 102; in another implementation, coil 501 and coil 105 may also be disposed on opposite sides of battery 102.

[0065] In this way, in low-temperature scenarios, the battery heating device can generate an alternating magnetic field, causing eddy current losses in the battery, thereby heating the battery and improving its range.

[0066] Optionally, the battery heating device may further include: a second magnetic conductive unit (which may correspond to magnetic conductive unit 902), the second magnetic conductive unit being located on the side of the second coil away from the battery.

[0067] In this way, the nanocrystal 902 can effectively guide and shield the magnetic circuit. After adding the nanocrystal 902, the magnetic field lines that penetrate the nanocrystal 902 to reach the electronic device casing or other components are reduced or eliminated. The casing or other devices, including metal components, will not be affected by the alternating magnetic field, for example, eddy current heat will not be generated. This reduces the probability of other devices being damaged due to excessive temperature and improves the feasibility of using the coil 501 to heat the battery in this embodiment of the application without affecting the operation of other devices.

[0068] Optionally, the battery heating device further includes: a first graphite layer located on the side of the first magnetically conductive unit facing the battery; and / or, a second graphite layer (which may correspond to graphite layer 901) located on the side of the second coil facing the battery.

[0069] In this way, the graphite layer has good thermal conductivity. After adding the graphite layer 901, the electronic device can evenly distribute the heat generated by the aluminum-plastic film of the battery 102 to the entire battery through the graphite layer 901, reducing the local temperature of the battery from being too high.

[0070] Fifthly, embodiments of this application provide another electronic device, which includes: a first coil, a first magnetically conductive unit, a second coil, and a battery; the first coil is used for wirelessly charging the battery; the first magnetically conductive unit is located on the side of the first coil facing the battery; the second coil is located on the side of the battery away from the first magnetically conductive unit; and is used to generate an alternating magnetic field to heat the battery.

[0071] It is understood that the battery heating device shown in the fourth aspect can be applied to electronic devices. The fifth aspect can be referred to in the relevant description in the fourth aspect.

[0072] In this way, in low-temperature scenarios, electronic devices can generate an alternating magnetic field to cause eddy current losses in the battery, thereby heating the battery and improving its battery life.

[0073] Optionally, the electronic device may also include a second magnetic conductive unit located on the side of the second coil away from the battery.

[0074] In this way, the nanocrystal 902 can effectively guide and shield the magnetic circuit. After adding the nanocrystal 902, the magnetic field lines that penetrate the nanocrystal 902 to reach the electronic device casing or other components are reduced or eliminated. The casing or other devices, including metal components, will not be affected by the alternating magnetic field, for example, eddy current heat will not be generated. This reduces the probability of other devices being damaged due to excessive temperature and improves the feasibility of using the coil 501 to heat the battery in this embodiment of the application without affecting the operation of other devices.

[0075] Optionally, the electronic device further includes: a first graphite layer located on the side of the first magnetically conductive unit facing the battery; and / or, a second graphite layer located on the side of the second coil facing the battery.

[0076] In this way, the graphite layer has good thermal conductivity. After adding the graphite layer 901, the electronic device can evenly distribute the heat generated by the aluminum-plastic film of the battery 102 to the entire battery through the graphite layer 901, reducing the local temperature of the battery from being too high.

[0077] Optionally, the electronic device also includes a screen, a mid-frame, and a back cover; the mid-frame is located on the side of the screen facing the second magnetically conductive unit, and the back cover is located on the side of the first coil away from the first magnetically conductive unit.

[0078] The structure is shown in Figure 9B. Thus, the battery heating device as shown in the fourth aspect can be applied to electronic devices, with coil 501 and coil 105 respectively disposed on both sides of the battery 102, thereby enabling the battery 102 to be heated using coil 501.

[0079] In a sixth aspect, embodiments of this application provide a battery heating method, applied to an electronic device as shown in the second or fifth aspect, the method comprising: when the battery temperature is detected to be less than or equal to a first preset temperature (e.g., -20°C), controlling a second coil to generate an alternating magnetic field to heat the battery; when the battery temperature is detected to be greater than a second preset temperature, controlling the second coil to stop generating the alternating magnetic field; the second preset temperature being greater than the first preset temperature.

[0080] In this way, electronic devices can heat the battery in low-temperature environments to reduce battery wear and extend battery life; once the battery temperature reaches the target level, heating the battery is stopped to prevent the battery temperature from becoming too high and causing safety issues.

[0081] Optionally, before controlling the second coil to use an alternating magnetic field to heat the battery, the method further includes: detecting the battery status and battery temperature; the battery status includes an uncharged state, a wired charging state, and a wireless charging state; when the battery status is uncharged and the battery temperature is less than or equal to a first preset temperature, controlling the first switching unit to open and controlling the second switching unit to close; controlling the second coil to use an alternating magnetic field to heat the battery includes: the battery inputting a first DC signal to the first chip; the first chip converting the first DC signal into a first AC signal and inputting the first AC signal to the second coil; the second coil generating a first electromagnetic signal based on the first AC signal; after controlling the second coil to stop generating the alternating magnetic field, the method includes: controlling the second switching unit to open and controlling the first switching unit to close.

[0082] This process corresponds to the embodiment shown in Figure 11. In a low-temperature and uncharged environment, the electronic device can use battery 102 to provide power to coil 501 for heating. During heating, control switch unit Q1 1002 is open and switch unit Q2 1004 is closed. After heating is complete, control switch unit Q1 1002 is closed and switch unit Q2 1004 is open.

[0083] In this way, the electronic device can heat the battery in a low-temperature environment. The amount of electricity saved after the battery is heated is greater than the amount of electricity supplied by the battery to the coil 501, thus extending the battery's battery life.

[0084] Optionally, before controlling the first switch unit to open and the second switch unit to close, the method further includes: displaying a first prompt message, the first prompt message being used to prompt the user whether to heat the battery when the battery temperature is less than or equal to a first preset temperature; controlling the first switch unit to open and the second switch unit to close includes: in response to an operation to turn on battery heating, controlling the first switch unit to open and the second switch unit to close.

[0085] This process can correspond to the embodiment shown in Figure 11. In one implementation, the electronic device can detect a low-temperature environment and prompt the user via a first notification message, allowing the user to choose whether to activate the battery heating function, thereby improving the user experience.

[0086] Optionally, controlling the second switch unit to open and controlling the first switch unit to close further includes: controlling the second switch unit to open and controlling the first switch unit to close when the battery temperature is less than or equal to a second preset temperature and the duration of heating the battery is greater than a preset duration.

[0087] To improve the safety of the battery heating solution, the heating time can also be set to reduce the scenario where the battery continues to heat up after the temperature detection fails, which could damage the device.

[0088] Optionally, before controlling the second coil to use an alternating magnetic field to heat the battery, the method further includes: when the battery is in a wired charging state and the battery temperature is less than or equal to a first preset temperature, controlling the first switching unit to open and controlling the second switching unit to close; controlling the second coil to use an alternating magnetic field to heat the battery includes: a first chip receiving a first DC signal from an external power source, converting the first DC signal into a first AC signal, and inputting the first AC signal into the second coil; the second coil generating a first electromagnetic signal based on the first AC signal; after controlling the second coil to stop generating the alternating magnetic field, the method includes: controlling the second switching unit to open and controlling the first switching unit to close.

[0089] This process corresponds to the embodiments shown in Figures 12 and 13. In a low-temperature, wired charging environment, the electronic device can use power supply 1301 to provide power to coil 501 to heat battery 102. During heating, control switch unit Q1 1002 is open and switch unit Q2 1004 is closed. After heating is complete, control switch unit Q1 1002 is closed and switch unit Q2 1004 is open.

[0090] In this way, electronic devices can use an external power source to heat the battery in low-temperature environments and when wired charging is available, reducing battery wear and further extending battery life.

[0091] Optionally, before controlling the second coil to generate an alternating magnetic field to heat the battery, the method further includes: controlling the first switch unit to close and controlling the second switch unit to close when the battery is in a wireless charging state and the battery temperature is less than or equal to a first preset temperature; controlling the second coil to generate an alternating magnetic field to heat the battery includes: the first coil receiving a second electromagnetic signal and generating a second AC signal; the second coil receiving the second AC signal and generating a third electromagnetic signal; after controlling the second coil to stop heating the battery, the method includes: controlling the second switch unit to open and keeping the first switch unit closed.

[0092] This process corresponds to the embodiments shown in Figures 14 and 15. In a low-temperature and wireless charging environment, the electronic device can use the power received by coil 105 to provide power to coil 501 for heating battery 102. During heating, control switch unit Q1 1002 is closed and switch unit Q2 1004 is closed. After heating is complete, control switch unit Q1 1002 is closed and switch unit Q2 1004 is opened.

[0093] In this way, electronic devices can use the electrical energy obtained from wireless charging to heat the battery in low-temperature environments and when wireless charging is used, thereby reducing battery wear and further extending the battery's battery life.

[0094] Seventhly, embodiments of this application provide an electronic device, which may also be referred to as a terminal device, terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device may be a mobile phone, smart TV, wearable device, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc.

[0095] The electronic device includes: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, causing the electronic device to perform the method as described in the first aspect.

[0096] Eighthly, embodiments of this application provide a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the method as described in the sixth aspect.

[0097] Ninthly, embodiments of this application provide a computer program product, which includes a computer program that, when run, causes a computer to perform the method as described in the sixth aspect.

[0098] In a tenth aspect, embodiments of this application provide a chip system including at least one processor and a communication interface, the communication interface and the at least one processor being interconnected via a line, the at least one processor being used to run computer programs or instructions to perform the method as described in the sixth aspect.

[0099] It should be understood that the seventh to tenth aspects of this application correspond to the technical solutions of the first to sixth aspects of this application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation are similar, and will not be repeated here. Attached Figure Description

[0100] Figure 1A is a schematic diagram of a possible implementation of wireless charging;

[0101] Figure 1B is a schematic diagram of the structure of an electronic device 100 in a possible implementation;

[0102] Figure 1C is a schematic diagram of the structure of an electronic device 100 in a possible implementation;

[0103] Figure 2 is a schematic diagram of the structure of battery 102 in a possible implementation;

[0104] Figure 3 is a schematic diagram of the structure of a possible wireless charging device 200 wirelessly charging an electronic device 100;

[0105] Figure 4 is a schematic diagram of a possible implementation of an electronic device 100 wirelessly charging another device 300;

[0106] Figure 5A is a schematic diagram of a battery heating device provided in an embodiment of this application;

[0107] Figure 5B is a schematic diagram of a battery heating device provided in an embodiment of this application;

[0108] Figure 6 is a schematic diagram illustrating the principle of the battery heating device provided in the embodiment of this application for heating the battery;

[0109] Figure 7 is a schematic diagram of the structure of a coil module provided in an embodiment of this application;

[0110] Figure 8 is a schematic diagram of another coil module provided in an embodiment of this application;

[0111] Figure 9A is a schematic diagram of another battery heating device provided in an embodiment of this application;

[0112] Figure 9B is a schematic diagram of another battery heating device provided in an embodiment of this application;

[0113] Figure 10 is a schematic diagram of a heating circuit provided in an embodiment of this application;

[0114] Figure 11 is a schematic flowchart of a heating method provided in an embodiment of this application;

[0115] Figure 12 is a schematic flowchart of another heating method provided in an embodiment of this application;

[0116] Figure 13 is a schematic diagram of another heating circuit provided in an embodiment of this application;

[0117] Figure 14 is a schematic flowchart of another heating method provided in an embodiment of this application;

[0118] Figure 15 is a schematic diagram of another heating circuit provided in an embodiment of this application;

[0119] Figure 16 is a schematic diagram of a battery heating device provided in an embodiment of this application. Detailed Implementation

[0120] To facilitate a clear description of the technical solutions in the embodiments of this application, some terms and technologies involved in the embodiments of this application will be briefly introduced below:

[0121] 1. Wireless forward charging and wireless reverse charging

[0122] Wireless charging technology refers to the technology of charging using the principle of electromagnetic induction. Wireless charging can include wireless forward charging and wireless reverse charging. Wireless forward charging can refer to the wireless charging device 200 wirelessly charging the electronic device 100; wireless reverse charging can refer to the electronic device 100 wirelessly charging other devices 300.

[0123] Figure 1A shows the wireless positive charging scenario and the wireless reverse charging scenario, respectively.

[0124] Figure 1Aa shows a wireless charging scenario: the wireless charging system may include an electronic device 100 and a wireless charging device 200. The wireless charging device 200 may be vertical (the electronic device 100 is not placed horizontally when charging) or horizontal (the electronic device 100 is placed horizontally when charging). The wireless charging device 200 may be portable, such as a desktop wireless charging dock, or it may be mounted on other carriers, such as a car wireless charger.

[0125] Taking an electronic device 100 as a mobile phone and a wireless charging device 200 as a horizontal charger as an example, during use, after the electronic device 100 is placed on the wireless charging device 200, the wireless charging device 200 charges the electronic device 100, and the wireless charging device 200 and the electronic device 100 can communicate and interact. Specifically, during wireless charging, the positional relationship between the electronic device 100 and the wireless charging device 200 can be as follows: the electronic device 100 is located on the upper layer of the wireless charging device 200, and the back cover of the electronic device 100 (the side away from the display screen, also called the outer shell, back cover, and battery cover, etc.) is in contact with the base of the wireless charging device 200.

[0126] The scenario shown in Figure 1Ab is a wireless reverse charging scenario: the wireless charging system may include electronic device 100 and other devices 300. Other devices 300 may be portable electronic devices with wireless charging capabilities, including but not limited to: laptops, wireless headphones, mobile phones, smartphones, tablets, styluses, smart in-vehicle devices, navigators, action cameras, artificial intelligence devices, wearable devices, or virtual reality / augmented reality / mixed reality devices, etc.

[0127] Taking electronic device 100 as a mobile phone and other device 300 as a Bluetooth headset as an example, during use, after other device 300 is placed on electronic device 100, electronic device 100 charges other device 300, and other device 300 and electronic device 100 can communicate and interact. Specifically, during wireless charging, the back cover of electronic device 100 is placed upwards and the screen downwards. Other device 300 is placed on the back cover.

[0128] 2. Electronic equipment

[0129] The electronic devices in this application embodiment may include handheld devices with image processing functions, vehicle-mounted devices, etc. For example, some electronic devices include: mobile phones, tablets, PDAs, laptops, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices (such as vehicle infotainment systems), wearable devices, electronic devices in 5G, or future evolutions of public land mobile communications. The embodiments of this application do not limit the scope of electronic devices in a network (PLMN).

[0130] By way of example and not limitation, in this embodiment, the electronic device can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as hearing aids, glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0131] Furthermore, in this application embodiment, the electronic device can also be an electronic device in the Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects through communication technology, thereby realizing the intelligent interconnection of humans and machines and the interconnection of things.

[0132] The electronic devices in the embodiments of this application may also be referred to as: terminal equipment, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0133] 3. Structure of electronic devices

[0134] The following is a brief explanation of the structure of an electronic device, using a mobile phone as an example. (See Figure 1B.)

[0135] For ease of explanation, the placement of the electronic device 100 is shown in Figure 1Ba. The electronic device 100 may include a screen 10, a mid-frame 20, and a back cover (also referred to as a battery cover, rear shell, etc.) 30. The screen 10 or the back cover 30 of the electronic device 100 may be parallel to the xy plane. Taking the case where the z-value of the plane containing the screen 10 is less than the z-value of the plane containing the back cover 30 as an example, the electronic device 100 displays the mid-frame 20 and the back cover 30, with the screen 10 being obscured by the back cover 30.

[0136] Referring to the placement of the electronic device 100 described above, Figure 1Bb shows the internal structure of the electronic device 100. The electronic device 100 may specifically include: a screen 10, a mid-frame 20, a battery 102, a graphite layer 103 (also referred to as a first graphite layer), a magnetically conductive unit 104 (also referred to as a first magnetically conductive unit), a coil 105 (also referred to as a first coil, used for wireless charging of the battery), and a back cover 30. The plane in which any of the above components is located can be parallel to the xy-plane, and the z-value of the plane in which the components are located increases sequentially. That is, the mid-frame 20, battery 102, graphite layer 103, magnetically conductive unit 104, and coil 105 are sequentially arranged between the screen 10 and the back cover 30.

[0137] Screen 10 is used to display images.

[0138] The middle frame 20 is used to support and protect the internal components of the electronic device 100. The middle frame 20 may include a first part 21, a second part 22 and a third part 23; wherein the third part 23, the second part 22 and the first part 21 are arranged sequentially along the positive y-axis; the first part 21 is used to house the camera, audio device, etc.; the second part 22 can be a battery compartment for stably placing the battery; the third part 23 is used to house the audio device, USB interface and some sensors, etc.

[0139] The electronic device 100 also includes a motherboard 101, which may be located on the side of the first part 21 of the middle frame 20 facing the back cover 30.

[0140] The motherboard 101 is used to support the electronic device 100 to perform various functions. For example, the motherboard 101 may include a wireless transceiver chip (also known as a TRX chip); the wireless transceiver chip is used to control the use of power to provide charging services for the battery 102, or to control the battery 102 to charge other devices 300.

[0141] Battery 102, located on the second part of the middle frame 20 facing the back cover 30, is used to store and provide electrical energy. Graphite layer 103 is used for rapid heat dissipation. Magnetic conductive unit 104 is used to guide and shield magnetic circuits. Coil 105 is used for electromagnetic energy conversion. Back cover 30 is used to protect the internal components of electronic device 100.

[0142] Specifically, the internal structure of electronic device 100 will be further explained below with reference to the plan view and cross-sectional view of electronic device 100 in Figure 1C.

[0143] The internal structure of the electronic device 100 may include a motherboard 101, a battery 102, a graphite layer 103, and a coil module, as shown in the plan view of the internal structure of the electronic device in Figure 1Ca. The coil module may include a magnetically conductive unit 104 and a coil 105.

[0144] The coil 105 in the coil module can be specifically used to convert magnetic energy into electrical energy when the electronic device uses a wireless charging device 200 (e.g., a wireless charger) to charge the battery 102; or to convert electrical energy into magnetic energy when the electronic device uses the battery 102 to charge other devices 300. The magnetically conductive unit 104 in the coil module can be used to shield the magnetic circuit, guide the magnetic circuit, and enhance the coil inductance. During energy conversion by the coil 105, some energy can be converted into heat energy. The graphite layer 103 can be specifically used to quickly and evenly distribute the heat generated by the coil 105 to the battery and the mobile phone body, achieving heat dissipation and preventing the battery 102 from overheating.

[0145] Referring to the cross-sectional view of the electronic device structure shown in Figure 1Cb, it can be seen that between the middle frame 20 and the back shell 30, a battery 102, a graphite layer 103, a magnetic conductive unit 104, and a coil 105 are arranged in sequence; wherein, the battery 102 is located on the side closer to the middle frame 20, and the coil 105 is located on the side closer to the back shell 30.

[0146] The magnetic conductive unit 104 in the coil module is located on the side closer to the battery 102, and the coil 105 in the coil module is located on the side farther away from the battery 102. When the coil 105 generates a magnetic field, the magnetic conductive unit 104 can reduce the electromagnetic waves received by the battery 102 and reduce eddy current losses.

[0147] 4. Coil: Used to convert magnetic energy into electrical energy. Coils can be flexible printed circuit (FPC) coils or wire-wound coils. The material of the coil can be copper.

[0148] 5. Magnetic Conducting Unit: This can be nanocrystalline (also known as iron-based nanocrystalline soft magnetic material). Nanocrystalline materials are magnetic materials formed by alloys of five materials: iron, silicon, boron, copper, and niobium (Fe, Si, B, Cu, Nb), which are intermediate between amorphous and crystalline materials. The crystal size of this magnetic material is around 10 nm, hence the name nanocrystalline.

[0149] Nanocrystals can be used in mobile phone wireless coils. Nanocrystals possess high saturation magnetic induction, reaching 1.2–1.4 Tesla (T); simultaneously, they exhibit very high permeability, with relative permeability reaching tens of thousands. When a coil generates a magnetic field, nanocrystals can be used to shield magnetic circuits, guide magnetic circuits, and enhance coil inductance. A single layer of nanocrystals is approximately tens of micrometers thick. In practical applications, electronic devices can also employ multilayer nanocrystals to increase wireless charging power and avoid saturation.

[0150] Taking wireless charging of other devices 300 by electronic device 100 as an example, the principle of shielding the magnetic circuit by the magnetic conductive unit can be shown in Figure 1Cc. In the structure shown in Figure 1Cb, when coil 105 is energized, it generates a magnetic field, sending multiple magnetic field lines to coil 301 of other devices 300. The directions of these magnetic field lines are shown in Figure 1Cc. Most magnetic field lines are formed above nanocrystal 104, and some reach nanocrystal 104 to form a magnetic circuit. There are no or only a few magnetic field lines below nanocrystal 104 because nanocrystal 104 has a high permeability, causing the magnetic field lines near nanocrystal 104 to be concentrated and shielded within it, thus reducing the magnetic field strength below nanocrystal 104.

[0151] 6. Battery: Figure 2a shows the structure of a battery 102, as shown in Figure 2. The battery 102 may include a positive electrode 205, a separator 206, a negative electrode 207, and an aluminum-plastic film 201. The internal cell of the battery 102 is formed by sequentially stacking the positive electrode 205, the separator 206, and the negative electrode 207; it is externally encapsulated with the aluminum-plastic film 201; positive electrode tabs 203 and negative electrode tabs 204 are welded to the insulating sheets 202 on both sides, and electrolyte 208 is injected into the cell and then sealed.

[0152] Aluminum-plastic film 201 (also known as aluminum-plastic film for lithium-ion batteries) is a packaging material for soft-pack lithium-ion batteries. It possesses puncture resistance, corrosion resistance, high temperature resistance, and good barrier properties. Aluminum-plastic film 201 protects the internal materials of the lithium-ion battery. Soft-pack lithium-ion batteries, with their advantages of high safety performance, light weight, thinness, and high energy density, are widely used in 3C smart digital products, new energy electric vehicles, and energy storage equipment.

[0153] The aluminum-plastic film 201 is typically composed of multiple layers of composite materials. For example, Figure 2b shows a schematic diagram of one structure of the aluminum-plastic film 201. The outermost layer of the aluminum-plastic film 201 is the outer barrier layer 2011, usually composed of nylon (PA) or polyethylene terephthalate (PET), used to protect the intermediate aluminum foil from scratches and reduce damage to the battery from external factors such as impacts. The middle layer of the aluminum-plastic film 201 is the permeation barrier layer 2013, usually composed of aluminum foil, used to prevent oxygen and moisture from entering. The innermost layer of the aluminum-plastic film 201 is the heat-sealing layer 2014, usually modified cast polypropylene (CPP), which serves as a sealing and adhesive layer. The outer barrier layer 2011 and the permeation barrier layer 2013 are bonded together by an adhesive layer (SFL) 2012, and the heat-sealing layer 2014 and the permeation barrier layer 2013 are bonded together by the SFL layer 2012.

[0154] 7. Other terms

[0155] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0156] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0157] It should be noted that the phrase "at...time" in the embodiments of this application can refer to the instant at which a certain situation occurs, or to a period of time after the occurrence of a certain situation; the embodiments of this application do not specifically limit this. Furthermore, the display interface provided in the embodiments of this application is merely an example, and the display interface may include more or less content.

[0158] In low-temperature environments, the charging and discharging performance of batteries is lower than that under normal conditions. This is because low temperatures reduce the activity of active materials involved in chemical reactions within the battery, increase internal resistance, and lead to increased energy loss during charging and discharging, resulting in the following problems.

[0159] For example, when users use electronic devices outdoors in cold regions, the remaining battery power decreases more quickly, resulting in shorter battery life. Another example is when users charge their electronic devices outdoors in cold regions using charging equipment, the battery level increases more slowly, resulting in low charging efficiency.

[0160] In one possible implementation, at low temperatures, the components in an electronic device can generate heat during operation. This heat can, to some extent, raise the battery temperature, slow down the rate of battery performance degradation, and improve the battery's charging and discharging performance. However, this method relies on the electronic device's own heat generation, resulting in a slow battery heating rate and insufficient temperature rise. Furthermore, the heated battery still exhibits significant internal resistance, making this heating method ineffective for battery heating.

[0161] For example, the following description, in conjunction with Figure 3, illustrates a possible implementation of heating the battery based on the charging process of an electronic device.

[0162] Figure 3 illustrates the process of using a wireless charging device 200 to charge an electronic device 100.

[0163] The wireless charging device 200 includes a power supply 301, a wireless transmitting chip 302, and a transmitting coil 303 (also referred to as a third coil); the electronic device 100 includes a battery 102, a charging chip 304 (e.g., a charger chip), a wireless transceiver chip 305, and a coil 105 (which can be used as a receiving coil). The wireless transmitting chip 302 is electrically connected to both the transmitting coil 303 and the power supply 301. The battery 102 is electrically connected to the charging chip 304; the wireless transceiver chip 305 is electrically connected to both the coil 105 and the charging chip 304. A boost circuit chip (e.g., a Boost chip, not shown in the figure) may also be connected between the power supply 301 and the wireless transmitting chip 302.

[0164] The wireless transceiver chip 305 supports wireless receiving to convert AC signals to DC signals and wireless transmitting to convert DC signals to AC signals. In the aforementioned charging scenario, it can be used as a wireless receiving chip; the wireless transceiver chip 305 can also be referred to as the first chip.

[0165] When the wireless charging device 200 wirelessly charges the electronic device 100, the power supply 301 of the wireless charging device 200 provides a DC signal; after receiving the DC signal, the wireless transmitting chip 302 converts the DC signal into an AC signal and inputs the AC signal to the transmitting coil 303; the transmitting coil 303 responds to the AC signal and generates an electromagnetic signal.

[0166] The coil 105 of the electronic device 100 is coupled to the transmitting coil 303 of the wireless charging device 200. The coil 105 senses the electromagnetic signal emitted by the transmitting coil 303 and generates an alternating current signal; the coil 105 inputs the alternating current signal to the wireless transceiver chip 305; the wireless transceiver chip 305 can convert the alternating current signal into a direct current signal and input the direct current signal to the charging chip 304; the charging chip 304 charges the battery 102 according to the direct current signal.

[0167] In low-temperature scenarios, during the process of converting electromagnetic signals into electrical signals via coil 105, some energy is lost as heat. Based on Figure 1Cb, the heat generated by coil 105 can be evenly distributed to battery 102 through graphite layer 103, thus heating battery 102. Low-temperature charging affects battery life. In a possible implementation, the electronic device will turn off (or disable) charging chip 304 when it detects that the temperature is below a temperature threshold. In this case, electronic device 100 cannot charge.

[0168] As mentioned above, this method has the following drawbacks: the coil 105 provides relatively little heat, the battery 102 heats up slowly, and the electronic device 100 cannot charge when the temperature is below the temperature threshold. Even when the temperature exceeds the temperature threshold, the insufficient temperature rise results in a relatively large internal resistance in the heated battery, which affects charging efficiency.

[0169] In view of this, this application provides a battery heating device that heats the battery by placing it in a changing magnetic field, causing the metal in the battery to generate heat through eddy currents. Specifically, the electronic device can provide an alternating magnetic field based on a wireless transmitting chip and a coil; the aluminum-plastic film of the battery may include aluminum metal, which generates eddy currents in the alternating magnetic field; simultaneously, the aluminum-plastic film wraps the internal material of the battery, which can transfer heat to various parts of the battery more evenly, allowing the battery to heat up rapidly in low-temperature environments.

[0170] It should be noted that the electronic device includes a wireless transceiver chip, which can be used in wireless positive charging scenarios. In wireless reverse charging scenarios, the wireless transceiver chip can be used as a wireless transmitter chip. The transmitter chip can convert DC signals into AC signals, and then convert the AC signals into electromagnetic signals through a coil to transmit them to other devices. The embodiments of this application can achieve the effect of heating the battery or wirelessly charging other devices by reusing the function of the wireless transceiver chip in converting DC signals into AC signals.

[0171] The process of using electronic device 100 to charge other devices 300 will be explained below with reference to Figure 4; as shown in Figure 4:

[0172] Other devices 300 may include a battery 401, a wireless receiver chip 402, and a receiving coil 403; electronic device 100 includes a battery 102, a wireless transceiver chip 305 (which can be used as a wireless transmitter chip), and a coil 105 (which can be used as a transmitter coil). The wireless receiver chip 402 is electrically connected to both the receiving coil 403 and the battery 401. The wireless transceiver chip 305 is electrically connected to both the coil 105 and the battery 102.

[0173] When electronic device 100 wirelessly charges other device 300, battery 102 of electronic device 100 provides DC signal; after receiving DC signal, wireless transceiver chip 305 converts DC signal into AC signal and inputs AC signal to coil 105; coil 105 responds to the AC signal and generates electromagnetic signal.

[0174] The coil 105 of the electronic device 100 is coupled to the receiving coil 403 of the other device 300. The receiving coil 403 senses the electromagnetic signal emitted by the coil 105 and generates an alternating current signal; the receiving coil 403 inputs the alternating current signal to the wireless receiving chip 402; the wireless receiving chip 402 can convert the alternating current signal into a direct current signal, and the battery 401 is charged based on the direct current signal.

[0175] In the embodiment shown in Figure 4, the wireless transceiver chip 305 can provide an AC signal to the coil 105. Based on this function, this application embodiment provides a battery heating device, as shown in Figure 5A:

[0176] A battery heating device is disposed between the middle frame 20 and the back cover 30. The battery heating device may include: a battery 102, a graphite layer 103, a coil 501 (also referred to as a second coil, used to generate an alternating magnetic field to heat the battery), nanocrystals 104, and a coil 105. The nanocrystals 104 can be used to shield and guide the magnetic circuit; the nanocrystals 104 can also be other magnetically conductive units. The coil 501 is used to convert electrical signals into electromagnetic signals to heat the battery. The coil 105 can be used to convert electrical signals into electromagnetic signals to wirelessly charge other devices; alternatively, the coil 105 can also be used to convert electromagnetic signals into electrical signals to charge the battery.

[0177] Specifically, coil 501, nanocrystal 104, and coil 105 can be a coil module; coil 501 and coil 105 can be located on opposite sides of nanocrystal 104. Graphite layer 103 and the coil module are located on the same side of battery 102, with graphite layer 103 positioned between battery 102 and the coil module; coil 501 in the coil module is located closer to battery 102, and coil 105 in the coil module is located further away from battery 102.

[0178] Figure 5B illustrates the structure of the electronic device 100 in this embodiment of the application more intuitively, as shown in Figure 5B:

[0179] The placement of the electronic device 100 can be seen in Figure 1Ba. The electronic device 100 may include a screen 10, a mid-frame 20, a magnetically conductive unit 902 (also referred to as a second magnetically conductive unit), a coil 501, a graphite layer 901, a battery 102, a graphite layer 103, a magnetically conductive unit 104, a coil 105, and a back cover 30. The plane containing any of the above components can be parallel to the xy-plane, and the z-value of the plane containing the above components increases sequentially. That is, the mid-frame 20, battery 102, graphite layer 103, coil 501, magnetically conductive unit 104, and coil 105 are sequentially arranged between the screen 10 and the back cover 30. Multiple components can be bonded or stacked to form the above structure.

[0180] The working principle of this battery heating device will be explained below with reference to Figure 6a. As shown in Figure 6a:

[0181] In low-temperature scenarios, electronic devices can control the coil 501 to be energized. The energized coil 501 generates a magnetic field, producing multiple magnetic field lines. The directions of these magnetic field lines are shown in Figure 6a. Most magnetic field lines are formed below the nanocrystals 104, with some reaching the nanocrystals 104 to form magnetic circuits. Some of these magnetic field lines can penetrate the graphite layer 103 to reach the outer layer of the battery 102. The outer layer of the battery 102 is covered with an aluminum-plastic film 201, which contains aluminum metal. In an alternating magnetic field, aluminum metal generates eddy currents, as shown by the dashed box at the aluminum-plastic film 201 in Figure 6a. The aluminum-plastic film 201 converts electromagnetic signals into heat through these eddy currents, thereby heating the inside of the battery and raising the temperature of the battery 102.

[0182] In this embodiment, the absence or presence of a small number of magnetic field lines above the nanocrystal 104 is due to the high permeability of the nanocrystal 104, which causes the magnetic field lines near the nanocrystal 104 to be concentrated and shielded within the nanocrystal 104, thereby reducing the magnetic field strength of the upper layer of the nanocrystal 104.

[0183] Understandably, coils 105 and 501 reuse the wireless transmission function of the wireless transceiver chip. In the structure shown in Figure 5A, the coil module of the battery heating device includes coil 105, coil 501, and nanocrystal 104. During charging and discharging, the electronic device controls coil 105 to be energized. At this time, nanocrystal 104 can also be used to shield and guide the magnetic circuit, reducing the magnetic field lines reaching battery 102 and lowering the heat of battery 102.

[0184] Specifically, the magnetic field of the structure shown in Figure 5A during the charging and discharging process will be explained below with reference to Figure 6b:

[0185] In the structure shown in Figure 5A, during the process of wirelessly charging electronic device 100 using wireless charging device 200, or wirelessly charging other device 300 using electronic device 100, the electronic device control coil 105 is energized, while the control coil 501 is de-energized. The energized coil 105 can generate a magnetic field, producing multiple magnetic field lines. The directions of these magnetic field lines are shown in Figure 6b. Most magnetic field lines are formed above the nanocrystal 104, and some reach the nanocrystal 104 to form a magnetic loop. Due to the high permeability of the nanocrystal 104, the magnetic field lines near the nanocrystal 104 are concentrated and shielded within the nanocrystal 104, leaving little or no magnetic field lines below the nanocrystal 104.

[0186] In this way, coil 501 will not be affected by the alternating magnetic field generated by coil 105 after being energized. For example, if nanocrystals 104 are not present between coil 105 and coil 501, coil 501 can receive the alternating magnetic field generated by coil 105 after being energized, and coil 501 can induce electromagnetic signals to generate alternating current signals. In this embodiment, coil 501 is used to heat the battery, and the electronic device does not need to use coil 501 for charging or reverse charging. Therefore, the addition of nanocrystals 104 can effectively reduce the mutual influence between coil 105 and coil 501 during operation. In addition, after nanocrystals 104 shield and guide the magnetic circuit, fewer or no magnetic field lines can reach the outer layer of the battery, thereby reducing the eddy currents generated in the battery and lowering the battery temperature during charging or reverse charging of the electronic device.

[0187] Comparing Figure 1Cc, it can be seen that in both charging and reverse charging scenarios, the structures shown in Figure 5A and Figure 1Cb energize the coil 105. Although there are differences between the two structures, the location of the magnetic field lines is roughly the same, both located on the nanocrystal 104. Therefore, after adding the coil 501 for heating the battery, the structure shown in Figure 5A will not affect the normal use of wireless positive charging of electronic devices or wireless reverse charging of other devices.

[0188] In this embodiment, the graphite layer 103 has a large contact area with the battery 102, and the graphite layer 103 has good thermal conductivity, which can quickly and evenly transfer the heat generated by the eddy current to the entire battery 102, thereby achieving rapid heating of the battery 102.

[0189] Optionally, in the battery heating device, the graphite layer 103 may not be included between the coil module and the battery 102. Since aluminum has good thermal conductivity and is relatively uniformly wrapped around the outer layer of the battery 102, after the aluminum generates heat loss, the electronic device can also use the aluminum to uniformly transfer heat to the entire battery 102, thereby achieving rapid heating of the battery 102. This process may not involve the graphite layer 103 for heat conduction.

[0190] It should be noted that, since coil 105 and coil 501 serve different functions, their materials, number of turns, and specifications are also different. For example, coil 105 generates or transmits electrical signals based on the principle of magnetism generating electricity or electromagnetism, so the conductivity of the material can be a primary consideration when selecting coil 105, and the material of coil 105 can be copper, which has good conductivity. Coil 501, on the other hand, is not used to transmit electrical signals, so its material, thickness, and number of turns can be set according to factors such as cost, thickness, and manufacturability; this application embodiment does not impose any restrictions on these aspects.

[0191] Based on the embodiment shown in Figure 5A, this application provides various coil module structures. Figure 7 shows a schematic diagram of the coil module structure provided in this application.

[0192] The coil module may include coil 105, coil 501, and nanocrystal 104. Figure 7a is a plan view of one side of the coil module. Coil 105 has a tap 701 (also called the first tap), which is used to lead out the lead wire connecting coil 105 to the wireless transceiver chip of the motherboard 101; coil 501 has a tap 702 (also called the second tap), which is used to lead out the lead wire connecting coil 501 to the wireless transceiver chip of the motherboard 101.

[0193] To achieve better shielding of the guiding magnetic circuit, the specifications of nanocrystal 104 can be greater than or equal to those of coil 105, and the specifications of nanocrystal 104 can be greater than or equal to those of coil 501. The specifications of the coil are related to factors such as the number of turns and the material. Since coil 105 and coil 501 have different functions, their specifications can be the same or different.

[0194] After flipping the coil module, a plan view of the other side of the coil module, as shown in Figure 7b, can be displayed. Connectors for connection to the main board 101 can be provided on the other side of the coil module; for example, connectors 7011 and 7012 are provided on tap 701; connectors 7021 and 7022 are provided on tap 702. Electronic devices can connect coil 105 to wireless transceiver chip 305 via connectors 7011 and 7012; electronic devices can also connect coil 105 to wireless transceiver chip 305 via connectors 7021 and 7022. After connection to wireless transceiver chip 305, the two connectors on any tap can be used to input or output AC signals respectively, forming a closed loop.

[0195] The connector can be a pad (also called a spring, contact, etc.), and the motherboard 101 has a socket that matches the pad. Electronic devices can connect their coils to the motherboard by fastening the pad to the socket. The connector can also be a board-to-board (BTB) fastener, and the motherboard 101 can have a socket that matches the fastener. Electronic devices can connect their coils to the motherboard by fastening the fastener to the socket. The connector can also be a solder joint for soldering to the motherboard. This application does not limit the type, appearance, or connection principle of the connector.

[0196] For ease of understanding, Figure 7c shows a side view of the coil module; it can be seen that coil 105 and coil 501 are decoupled and can be formed by sequentially bonding and stacking coil 105, nanocrystal 104 and coil 501 to form the above-mentioned coil module.

[0197] Optionally, in the structure of the coil module shown in Figure 7, the connectors of each coil can be located on the same side. For example, connectors 7011 and 7012 are both located on the side closer to coil 501, and connectors 7021 and 7022 are both located on the side away from coil 105; or, connectors 7011 and 7012 are both located on the side away from coil 501, and connectors 7021 and 7022 are both located on the side closer to coil 105.

[0198] Optionally, the connectors for each coil can be located on different sides. For example, connectors 7011 and 7012 can both be located on the side away from coil 105, and connectors 7021 and 7022 can both be located on the side away from coil 501; or, connectors 7011 and 7012 can both be located on the side closer to coil 105, and connectors 7021 and 7022 can both be located on the side closer to coil 501. This application embodiment does not limit the position, orientation, etc., of the connectors.

[0199] The above embodiments illustrate the structure of a coil module in which coil 105 and coil 501 are decoupled; in practical scenarios, coil 105 and coil 501 can also be coupled; the structure of another coil module provided in this application embodiment will be described below with reference to Figure 8, as shown in Figure 8:

[0200] The coil module may include coil 105, coil 501, and nanocrystal 104. Figure 8a shows a plan view of one side of the coil module, where coil 105 has a corresponding tap 701 and coil 501 has a corresponding tap 702. Coil 105 and coil 501 are coupled through a connecting module 801, meaning that taps 701 of coil 105 and 702 of coil 501 can be connected.

[0201] After flipping the coil module, a plan view of the other side of the coil module, as shown in Figure 8b, can be displayed. Multiple connectors for connecting to the motherboard 101 can be provided on the other side of the connection module 801; for example, connectors 8011, 8012, 8013, and 8014 are provided on the connection module 801. Electronic devices can connect the coil 105 to the wireless transceiver chip 305 via connectors 8011 and 8012; electronic devices can also connect the coil 105 to the wireless transceiver chip 305 via connectors 8013 and 8014. After being connected to the wireless transceiver chip 305, any two connectors connected to the same tap can be used to input AC signals or output AC signals respectively, forming a closed loop; for example, connector 8011 is used to input AC signals and connector 8012 is used to output AC signals; or, connector 8012 is used to input AC signals and connector 8011 is used to output AC signals; or, connector 8013 is used to input AC signals and connector 8014 is used to output AC signals; or, connector 8014 is used to input AC signals and connector 8013 is used to output AC signals.

[0202] For ease of understanding, Figure 8c shows a side view of the coil module; it can be seen that coil 105 and coil 501 are integrated, and coil 105 and coil 501 can be connected by connecting module 801. The above-mentioned coil module can be obtained by bonding nanocrystals 104 in the middle of the connecting part of coil 105 and coil 501.

[0203] In the structure of the coil module shown in Figure 8, the embodiments of this application do not limit the type, position, orientation, appearance and connection principle of the multiple connectors.

[0204] The above embodiments, in conjunction with Figures 5A-8, have described the structure of a battery heating device provided in this application. The structure of another battery heating device provided in this application, in conjunction with Figures 9A and 9B, will now be described.

[0205] In the battery heating device shown in Figure 5A, the coil 105 for wireless charging (wireless forward charging and / or wireless reverse charging) and the coil 501 for heating the battery are combined and packaged into a coil module. This application embodiment provides another structure where the battery heating device can be provided with a separate heating coil or coil module, distinguishable from the coil module used for wireless charging. The structure of this battery heating device is shown in Figure 9Aa.

[0206] A battery heating device may be disposed between the battery 102 and the middle frame 20; the battery heating device may include the battery 102 and a coil module for heating the battery 102; the coil module for heating the battery 102 includes, but is not limited to, the following components: coil 501 and / or nanocrystals 902. The battery heating device may also include a graphite layer 901.

[0207] In one possible implementation, the battery heating device includes a battery 102 and a coil 501; the coil 501 can be disposed on the side of the battery 102 away from the coil module for wireless charging. For example, this location can be seen in Figure 9Ab, where the coil module for wireless charging and a graphite layer 103 can be disposed on one side of the battery 102. The coil module for wireless charging may include a coil 105 and nanocrystals 104, and a graphite layer 103 is also included between the coil module for wireless charging and the battery 102. The upper part of the structure shown in Figure 9Ab is the same as or similar to the structure shown in Figure 1Cb, and will not be described again in this embodiment. On the other side away from the coil module for wireless charging, the electronic device can be provided with the coil 501.

[0208] In this way, in low-temperature scenarios, the electronic device can control the coil 501 to be energized. The energized coil 501 can generate a magnetic field, producing multiple magnetic field lines. Some of these magnetic field lines can reach the outer layer of the battery 102, while the magnetic field lines passing through the aluminum metal in the aluminum-plastic film 201 can generate eddy currents. These eddy currents cause the aluminum metal to heat up, and the electronic device uses the aluminum metal to evenly distribute the heat throughout the battery, thereby heating it. This principle is the same as or similar to the heating principle of the structure shown in Figure 5A, and will not be described in detail in this embodiment.

[0209] In another possible implementation, the battery heating device includes a battery 102, a coil 501, and nanocrystals 902. The coil 501 may be located between the battery 102 and the nanocrystals 902, and both the coil 501 and the nanocrystals 902 are located on one side of the coil module for wireless charging, away from the battery 102.

[0210] It is understandable that nanocrystal 902 can effectively guide and shield magnetic circuits. After adding nanocrystal 902, the magnetic field lines penetrating nanocrystal 902 to reach the electronic device casing or other components are reduced or eliminated. The casing or other devices, including metal components, will not be affected by alternating magnetic fields, for example, eddy current heat will not be generated. This reduces the probability of other devices being damaged due to excessive temperature and improves the feasibility of using coil 501 to heat the battery in the embodiments of this application without affecting the operation of other devices.

[0211] In another possible implementation, the battery heating device may include a battery 102, a coil 501, nanocrystals 902, and a graphite layer 901. A graphite layer 901 is disposed between the coil module for heating the battery 102 and the battery 102. The coil 501 in the coil module is located on the side closer to the battery 102, and the nanocrystals 902 in the coil module are located on the side farther away from the battery 102.

[0212] Understandably, the graphite layer 901 has good thermal conductivity. After the graphite layer 901 is added, the electronic device can evenly distribute the heat generated by the aluminum-plastic film of the battery 102 to the entire battery through the graphite layer 901, thereby reducing the local overheating of the battery.

[0213] In another possible implementation, the battery heating device can be placed below and in the middle frame of the battery 102; the electronic device can be equipped with a set of coil modules for heating the battery 102, referring to the battery heating devices in the three possible implementations described above. To improve heating efficiency and achieve rapid battery heating in low-temperature environments, the electronic device can also be equipped with multiple sets of coil modules for heating the battery 102. For example, taking two sets of coil modules for heating the battery 102 as an example, one set of coil modules for heating the battery 102 can be configured with the structure shown in FIG5A, placing the heating coil between the coil module for wireless charging and the battery. The other set of coil modules for heating the battery 102 can be configured with the structure shown in FIG9A, placing the heating coil on the side of the battery away from the coil module for wireless charging. The two sets of coil modules work together to accelerate the heating rate.

[0214] For example, Figure 9B more intuitively illustrates the structure of the electronic device 100 in this embodiment of the application, as shown in Figure 9B:

[0215] The placement of the electronic device 100 can be seen in Figure 1Ba. The electronic device 100 may include a screen 10, a mid-frame 20, a battery 102, a graphite layer 103, a coil 501, a magnetically conductive unit 104, a coil 105, and a back cover 30. The plane containing any of these components can be parallel to the xy-plane, and the z-value of the plane containing each component increases sequentially. That is, the mid-frame 20, magnetically conductive material 902, coil 501, graphite layer 901, battery 102, graphite layer 103, magnetically conductive unit 104, and coil 105 are sequentially arranged between the screen 10 and the back cover 30. Multiple components can be bonded or stacked to form the above structure.

[0216] It should be noted that the embodiments of this application only exemplify the feasibility of various battery heating devices in conjunction with the principle of heat generation by eddy currents. However, the above structure does not limit the structure of the battery heating device provided in the embodiments of this application. Modifications, equivalent substitutions, improvements, etc., made on the basis of the above structure should all be included within the protection scope of this invention. The embodiments of this application will not list the possible structures of battery heating devices one by one.

[0217] The above embodiments illustrate various structures and principles of the battery heating device provided in this application; the relevant circuits and usage methods of the battery heating device will be further explained below with reference to Figures 10-15.

[0218] Figure 10 shows a schematic diagram of a heating circuit provided in an embodiment of this application. It is understood that during the battery heating process, the electronic device needs to reuse the wireless transceiver chip; therefore, the wireless transceiver chip actually controls two switching circuits, such as a first sub-circuit and a second sub-circuit. The first sub-circuit supports wireless charging functionality (e.g., wirelessly charging other devices or charging based on a wireless charging device), and the second sub-circuit supports the battery heating function. This heating circuit can be illustrated in Figure 10:

[0219] The heating circuit may include: a battery 102, a wireless transceiver chip 305, a coil 105, a switching unit Q1 1002 (also referred to as a first switching unit), a capacitor C1 1003 (also referred to as a first capacitor), a switching unit Q2 1004 (also referred to as a second switching unit), and a capacitor C2 1005 (also referred to as a second capacitor). The wireless transceiver chip 305 may include pins 1006, 1007, and 1008; pins 1006 and 1007 can be used to output or input AC signals, respectively; pin 1008 is used to input or output DC signals.

[0220] In this embodiment, pin 1006 of the wireless transceiver chip 305 is connected to pin 1007 of the wireless transceiver chip 305 via a first sub-circuit. The first sub-circuit includes a switching unit Q1 1002, a capacitor C1 1003, and a coil 105. For example, pin 1006 of the wireless transceiver chip 305 is electrically connected to the first end of the coil 105 via the switching unit Q1 1002 and the capacitor C1 1003, respectively; the second end of the coil 105 is electrically connected to pin 1007 of the wireless transceiver chip 305. Understandably, the order of the three components in the first sub-circuit can be adaptively adjusted. For example, after the positions of the switching unit Q1 1002 and the capacitor C1 1003 are interchanged, pin 1006 can be electrically connected to the first end of the coil 105 via the capacitor C1 1003 and the switching unit Q1 1002, respectively. Similar structures are not listed in detail in this embodiment.

[0221] Pin 1006 of the wireless transceiver chip 305 is also connected to pin 1007 of the wireless transceiver chip 305 via a second sub-circuit. The second sub-circuit is connected in parallel with the first sub-circuit and includes a switching unit Q2 1004, a capacitor C2 1005, and a coil 501. For example, pin 1006 of the wireless transceiver chip 305 is electrically connected to the first end of the coil 501 sequentially via the switching unit Q2 1004 and the capacitor C2 1005; the second end of the coil 501 is electrically connected to pin 1007 of the wireless transceiver chip 305. Understandably, the order of the three components in the second sub-circuit can be adjusted adaptively; referring to the first sub-circuit, this application will not repeat the details.

[0222] In addition, pin 1008 of the wireless transceiver chip 305 is connected to the battery 102. In wireless reverse charging or battery heating scenarios, pin 1008 can be used as an input to receive the DC signal output by the battery 102; in wireless positive charging scenarios, pin 1008 can be used as an output to provide a DC signal to the battery 102.

[0223] This circuit can be used in wireless positive charging, wireless reverse charging, and battery heating scenarios.

[0224] Specifically, in the wireless positive charging scenario, the electronic device can control the closing of switch unit Q1 1002 and the opening of switch unit Q2 1004, so that the first sub-circuit is in a closed state and the second sub-circuit is in an open state. Coil 105 can be used to receive electromagnetic signals from the transmitting coil of the wireless charging device 200 and to convert battery signals into AC signals; wireless transceiver chip 305 can be used to convert AC signals into DC signals; battery 102 can be used to receive and store DC signals.

[0225] Among them, capacitor C1 1003 can be used to adjust the resonant frequency so that the resonant frequency of wireless charging device 200 and electronic device 100 are consistent, thereby improving wireless charging efficiency. Of the three pins of wireless transceiver chip 305, pins 1006 and 1007 can be used as two input terminals to periodically receive AC signals from the first sub-circuit; pin 1008 can be used as an output terminal to transmit DC signals to battery 102.

[0226] In a wireless reverse charging scenario, the electronic device can control switch unit Q1 1002 to close and control switch unit Q2 1004 to open, making the first sub-circuit in a closed state and the second sub-circuit in an open state. Battery 102 can be used to provide a DC signal; wireless transceiver chip 305 can be used to convert the DC signal into an AC signal; coil 105 can be used to convert the AC signal into an electromagnetic signal, so that the receiving coil of other device 300 can receive the electromagnetic signal and achieve wireless charging based on the electromagnetic signal.

[0227] Among them, capacitor C1 1003 can be used to adjust the resonant frequency so that the resonant frequency of other devices 300 and electronic device 100 is consistent, thereby improving the wireless charging efficiency. Of the three pins of the wireless transceiver chip 305, pins 1006 and 1007 can be used as two output terminals to periodically input AC signals to the first sub-circuit; pin 1008 can be used as an input terminal to receive DC signals from battery 102.

[0228] In the battery heating scenario, the electronic device can control switch unit Q1 1002 to open and switch unit Q2 1004 to close, so that the first sub-circuit is in an open circuit state and the second sub-circuit is in a closed circuit state. Battery 102 can be used to provide DC power signals; wireless transceiver chip 305 can be used to convert DC power signals into AC power signals; coil 501 can be used to convert AC power signals into electromagnetic signals, so that the aluminum-plastic film of battery 102 receives the battery signal, generating eddy current effect and increasing the temperature of battery 102.

[0229] Among them, capacitor C2 1005 can be used to adjust the resonant frequency to increase the current of coil 501, enhance the magnetic field, and thus rapidly raise the battery temperature through the heat generated by eddy currents. Of the three pins of wireless transceiver chip 305, pins 1006 and 1007 can be used as two output terminals to periodically input AC signals to the second sub-circuit; pin 1008 can be used as an input terminal to receive DC signals from battery 102.

[0230] In this embodiment, the frequency of the AC signal output by the wireless transceiver chip 305 is related to the heat loss from the battery. Within a certain frequency range, the frequency of the AC signal is positively correlated with the heat loss from the battery. The electronic device can adjust the frequency of the AC signal through the wireless transceiver chip 305 to increase the heat loss from the battery, thereby increasing the battery's heating rate.

[0231] This is because the higher the frequency, the greater the resistance of the aluminum metal in battery 102, and the more heat is consumed by eddy currents. Furthermore, when current passes through a conductor, the conductor exhibits a skin effect. The skin depth is frequency-dependent and can be understood as the thickness of the conductor through which current can flow; beyond this skin depth, there is little or no current. The skin depth satisfies the following formula:

[0232] Where δ is the skin depth; ω is the angular frequency, ω = 2πf, where f is the frequency of the alternating current signal; μ is the permeability of the conductor; ρ is the resistivity of the conductor; and σ is the conductivity of the conductor. In the embodiments of this application, the conductor can be a metallic material in the battery, such as aluminum; μ is the permeability of aluminum; ρ is the resistivity of aluminum; and σ is the conductivity of aluminum.

[0233] As can be seen from the above formula, frequency f is negatively correlated with skin depth δ; the higher the frequency f, the smaller the skin depth δ. Understandably, a smaller skin depth δ indicates that the current only flows through the surface layer of the aluminum metal, while there is little or no current in the deeper layers, resulting in a smaller cross-sectional area through which the current can pass. For a conductor, the smaller the cross-sectional area through which the current passes, the greater the effective resistance of the conductor; therefore, the higher the frequency, the greater the equivalent resistance of the aluminum surface layer, and under the same current, the more heat is consumed by the aluminum metal, resulting in a faster battery heating rate.

[0234] Based on this, in this embodiment of the application, the frequency of the AC signal of the wireless transceiver chip 305 can be adjusted to improve the heating efficiency of the battery; wherein, the frequency of the AC signal can be positively correlated with the heating efficiency of the battery.

[0235] It should be noted that in wireless charging scenarios, the frequency of the AC signal output by the wireless transceiver chip 305 is often relatively fixed due to the influence of power transmission. For example, power transmission efficiency is maximized when the frequency of the AC signal is the same as the resonant frequency of coil 105 and capacitor C1 1003. In wireless charging scenarios, the frequency of the AC signal is related to the resonant frequencies of coil 105 and capacitor C1 1003. Therefore, the frequency of the AC signal output by the wireless transceiver chip 305 in wireless charging scenarios differs from the frequency of the AC signal output by the wireless transceiver chip 305 in battery heating scenarios.

[0236] Optionally, capacitor C2 may not be included in the second sub-circuit. Specifically, the second sub-circuit includes a switching unit Q2 1004 and a coil 501. Pin 1006 of the wireless transceiver chip 305 is connected to pin 1007 of the wireless transceiver chip 305 through the second sub-circuit. For example, pin 1006 of the wireless transceiver chip 305 is electrically connected to the first end of the coil 501 through the switching unit Q2 1004; the second end of the coil 501 is electrically connected to pin 1007 of the wireless transceiver chip 305.

[0237] Understandably, in possible implementations, wireless charging technology achieves power transmission through coil coupling. During wireless charging, the resonant frequency needs to be adjusted via capacitors and inductors, thereby adjusting the output impedance and the transmitted energy. The greater the transmitted energy, the faster the wireless charging efficiency; therefore, the first sub-circuit includes capacitor C1. However, in this embodiment, the second sub-circuit is designed for heating the battery, not for power transmission. Therefore, the second sub-circuit does not need to add a resonant capacitor to improve energy transmission efficiency. Removing capacitor C2 does not prevent the heating circuit from still heating the battery. Furthermore, in low-temperature scenarios, battery performance is often lower; the greater the current in coil 501, the greater the current output by the battery. In low-temperature non-charging scenarios, the battery power is consumed too quickly, potentially leading to insufficient power and inability to supply power. Therefore, in this embodiment, capacitor C2 may also be omitted.

[0238] The switching unit involved in the embodiments of this application can be any type of semiconductor switching unit, such as a metal-oxide-semiconductor (MOS) transistor or a bipolar transistor. When the switching unit is a MOS transistor, it can be an NMOS transistor or a PMOS transistor. When the switching unit is a bipolar transistor, it can be a PNP type bipolar transistor or an NPN type bipolar transistor; the embodiments of this application do not impose any restrictions on this.

[0239] Figure 10 illustrates the heating circuit provided in this application embodiment. The heating method provided in this application embodiment will now be described in conjunction with the above heating circuit and Figures 11-13. The flowchart in Figure 11 corresponds to the process of a user using an electronic device in a low-temperature environment, during which the electronic device is not charging. The flowchart in Figure 12 corresponds to the process of a user using a wireless charging device to charge an electronic device in a low-temperature environment. The flowchart in Figure 13 corresponds to the process of a user using a wireless charging device to charge an electronic device in a low-temperature environment.

[0240] Specifically, Figure 11 shows a schematic flowchart of a heating method provided in an embodiment of this application; as shown in Figure 11:

[0241] S1101, Electronic devices detect battery status and battery temperature; battery status includes wired charging status, wireless charging status, and no charging status.

[0242] Electronic devices can monitor battery status in real time. For example, an electronic device can obtain battery status through battery broadcasting, which can carry identifiers indicating battery status. These identifiers can include charging and not-charging identifiers; for example, the charging identifier could be BATTERY_STATUS_CHARGING; and the not-charging identifier could be BATTERY_STATUS_NOT_CHARGING.

[0243] Upon receiving a battery broadcast carrying a charging indicator, the AP side of the electronic device can detect whether the voltage value of the USB interface exceeds a voltage threshold; if the voltage value is greater than the voltage threshold, the electronic device determines that it is in a wired charging state.

[0244] Alternatively, coil 105 can generate an alternating current signal after entering the alternating magnetic field. When wireless transceiver chip 305 receives the alternating current signal, it can send an interrupt command to the AP side. The AP side determines the battery status as wireless charging state based on the interrupt command.

[0245] It should be noted that when wired charging is performed in a low-temperature environment, the electronic device may not enable the charging chip 304, which could result in charging failure. Furthermore, when wireless charging is performed in a low-temperature environment, the wireless transceiver chip must perform both wireless charging and battery heating functions, which may conflict with each other. Therefore, this application's embodiments distinguish between charging and non-charging scenarios, as well as between wired and wireless charging scenarios.

[0246] Other methods can also be used in this application to detect battery status to distinguish between uncharged, wireless charging, and wired charging scenarios. This application does not impose any limitations on this method.

[0247] Electronic devices can also monitor battery temperature in real time. For example, in an electronic device, a thermistor is placed around the battery, and the electronic device can obtain the battery temperature based on the correspondence between the thermistor's resistance value and temperature. Other methods can also be used to detect battery temperature in this application embodiment, and this application embodiment does not limit the methods used.

[0248] In this embodiment, when a low battery temperature is detected, a battery heating device is used to heat the battery. The battery temperature used to determine whether to activate the battery heating function can be a first preset temperature, such as -20°C. This first preset temperature can be set based on the relationship between the power consumed by heating the battery and the power loss at the current temperature; heating the battery can only save power and extend battery life when the power consumed by heating the battery is less than the power loss in a low-temperature environment.

[0249] S1102. When the battery temperature is less than or equal to the first preset temperature and the battery is not charging, the electronic device displays a prompt message; the prompt message is used to remind the user that the battery temperature is too low and whether to turn on the battery heating function.

[0250] If the battery temperature is less than or equal to the first preset temperature, it indicates that the current battery temperature is low. In this case, the battery heating function needs to be activated to ensure that the battery can maintain the normal operation of the electronic device.

[0251] When the battery temperature is low and the battery is not being charged, the electronic device can prompt the user with a message asking whether to activate the battery heating function. This message can be displayed as a pop-up window or as a notification. For example, the message might say, "Battery temperature is too low. To ensure normal device operation, would you like to activate the battery heating function?"

[0252] Optionally, the prompt message may also include controls for activating the battery heating function (also known as confirmation controls, confirmation controls, activation controls, etc.) and controls for deactivating the battery heating function (also known as deactivation controls, etc.). Users can choose whether to activate the battery heating function according to their own needs.

[0253] Optionally, before displaying the prompt message, the device may also detect running applications; displaying the prompt message may include: the device may display a prompt message when the application load exceeds a load threshold.

[0254] Understandably, when an electronic device has its screen on and is running applications, the battery consumes a significant amount of power. The device needs to heat the battery to offset the power consumption caused by low temperatures, thus improving its battery life in cold environments. For example, if a user is taking a photo in a cold environment and the camera app is detected, the device can display the aforementioned message to raise the battery temperature and extend the photo-taking time.

[0255] Optionally, the electronic device may not execute step S1102. For example, if the battery temperature is less than or equal to the first preset temperature and the battery is not charged, the electronic device may not display any prompt information, but directly turn on the battery heating function and execute step S1103 to disconnect the control switch unit Q1 1002.

[0256] S1103. Upon receiving an operation to activate the battery heating function, the electronic device control switch unit Q1 1002 is disconnected in response to the operation.

[0257] The operation to activate the battery heating function can be, for example, a selection operation of a control for activating the battery heating function. After determining that the conditions for activating the battery heating function are met, the electronic device can proceed with the battery heating process.

[0258] During battery heating, the first sub-circuit remains open, while the second sub-circuit remains closed. It's understandable that low-temperature environments are specific conditions where users are less likely to use electronic devices; however, in normal scenarios, electronic devices need to maintain normal wireless charging functionality. Therefore, in normal scenarios, switch unit Q1 1002 can remain on; in the battery heating scenario, switch unit Q1 1002, currently on, must be switched to the off state.

[0259] In some embodiments, the switching unit Q1 1002 can be turned on and off by the wireless transceiver chip and / or the AP side. For example, the wireless transceiver chip and / or the AP side may include a GPIO interface. The GPIO interface can output high and low levels, with a high level controlling the switching unit Q1 1002 to be turned on and a low level controlling the switching unit Q1 1002 to be turned off; or, a low level controlling the switching unit Q1 1002 to be turned on and a high level controlling the switching unit Q1 1002 to be turned off. This application does not limit this aspect.

[0260] S1104, Electronic Equipment Control Switch Unit Q2 1004 is turned on.

[0261] During battery heating, the first sub-circuit remains open, while the second sub-circuit remains closed. It's understandable that low-temperature environments are specific conditions where users are less likely to use electronic devices; however, in normal scenarios, electronic devices need to maintain normal wireless charging functionality. Therefore, in normal scenarios, switch unit Q2 1004 can remain open; in the battery heating scenario, switch unit Q2 1004, which is currently open, needs to be switched to the on state.

[0262] In some embodiments, the switching unit Q1 1002 can be turned on and off by the wireless transceiver chip and / or the AP side. This process can be referred to the relevant description in step S1103, and will not be repeated here.

[0263] It should be noted that, to reduce the potential problems that may arise from the simultaneous conduction of switching units Q1 1002 and Q2 1004, this embodiment of the application may first disconnect switching unit Q1 1002 to ensure that only one sub-circuit is connected in the heating circuit; and then turn on switching unit Q2 1004. In other embodiments, the electronic device may also first turn on switching unit Q2 1004 and then disconnect switching unit Q1 1002, that is, execute step S1104 first and then execute step S1103. This embodiment of the application does not impose any restrictions on this.

[0264] S1105. The electronic device detects whether the switching states of the switching unit Q1 1002 and the switching unit Q2 1004 are correct.

[0265] Step S1105 can be used to detect the state of switching unit Q1 1002 and switching unit Q2 1004 to reduce the problem scenarios caused by incorrect switching state of switching unit Q1 1002 and switching unit Q2 1004.

[0266] In some embodiments, the electronic device can determine whether the switching state of the switching unit is correct by detecting the voltage of the GPIO interface. Taking high level control for conduction and low level control for deactivation as an example, in step S1105, if the electronic device obtains that the GPIO interface used to control the switching unit Q1 1002 is at a low level and the GPIO interface used to control the switching unit Q2 1004 is at a high level, then the switching state of the switching unit is correct, and the electronic device can execute the subsequent steps.

[0267] Optionally, the electronic device may skip step S1105; that is, the electronic device executes step S1106 after completing step S1104. This application embodiment does not impose any limitations on this.

[0268] Optionally, if the switching states of switching unit Q1 1002 and switching unit Q2 1004 are correct, the electronic device may execute step S1106.

[0269] Optionally, if the switching states of switching units Q1 1002 and Q2 1004 are incorrect, the electronic device may execute steps S1103 and S1104 until the switching states of switching units Q1 1002 and Q2 1004 are correct, or the number of repetitions reaches a threshold.

[0270] S1106, The electronic device activates the battery heating function; wherein, the battery 102 can supply power to the coil 501 to achieve battery heating.

[0271] The electronic device activates the battery heating function by: controlling the battery 102 to output a DC signal, controlling the wireless transceiver chip 305 to convert the DC signal into an AC signal, and controlling the coil 501 to convert the AC signal into an electromagnetic signal. The frequency of the AC signal is a first frequency; upon receiving the electromagnetic signal, the battery 102 can generate eddy current losses based on the electromagnetic signal.

[0272] The heating principle of step S1106 can be found in the relevant description in Figure 6, and will not be repeated here.

[0273] It is understandable that in the battery heating scenario, the frequency of the AC signal output by the wireless transceiver chip 305 is the first frequency; in the wireless charging scenario, the frequency of the AC signal output by the wireless transceiver chip 3054 is the second frequency; the first frequency and the second frequency are different.

[0274] S1107. When the battery temperature is greater than the second preset temperature or the heating time is greater than the preset duration, the electronic device turns off the battery heating function.

[0275] The second preset temperature can be a temperature threshold used to determine whether to turn off the battery heating function, and the second preset temperature is greater than or equal to the first preset temperature. The preset duration can be a heating time threshold used to determine whether to turn off the battery heating function.

[0276] Understandably, once the battery temperature rises to a certain level, the electronic device shuts off the battery heating function to reduce problems caused by overheating, such as damage to the battery and related components. The second preset temperature can also be set based on the relationship between the amount of electricity consumed by heating the battery and the amount of electricity lost at the current temperature.

[0277] In addition, to improve the safety of the battery heating process, electronic devices can set a preset heating time. After the preset heating time is reached, the electronic device can turn off the battery heating function to reduce the problem of excessive battery temperature caused by software abnormalities or abnormal temperature detection.

[0278] In this embodiment of the application, the electronic device turns off the battery heating function by controlling the battery to stop outputting DC power signals and controlling the wireless transceiver chip to stop outputting AC power signals.

[0279] Optionally, in this embodiment, the determination condition for turning off the battery heating function may not include the preset duration. For example, step S1107 may also be: when the battery temperature is greater than a second preset temperature, the electronic device controls the wireless transceiver chip to stop outputting AC signals. This embodiment does not limit this.

[0280] S1108, Electronic equipment control switch unit Q2 1004 is disconnected.

[0281] S1109, Electronic equipment control switch unit Q1 1002 is turned on.

[0282] To reduce the impact of battery heating on wireless charging, after disabling the battery heating function, the electronic device can adjust the switching states of switching units Q1 1002 and Q2 1004 to a switching state suitable for wireless charging. For example, the electronic device control unit Q1 1002 is turned on and switching unit Q2 1004 is turned off.

[0283] Similarly, during the switching process, to ensure the mutual exclusion of the first and second sub-circuits when the battery is not charging, the electronic device can first disconnect switch unit Q2 1004 and then turn on switch unit Q1 1002. In some other embodiments, the electronic device can also execute step S1109 first and then step S1108, and this application embodiment does not limit this.

[0284] In this way, in low-temperature environments where electronic devices are not charging, the devices can heat the battery, reducing the impact of low temperatures on the battery, extending battery life, and improving the user experience.

[0285] Specifically, Figure 12 shows a schematic flowchart of another heating method provided in an embodiment of this application; as shown in Figure 12:

[0286] S1201, Electronic equipment detects battery status and battery temperature.

[0287] This step can be referred to in the relevant description in step S1101, and will not be repeated here.

[0288] S1202. When the battery temperature is less than or equal to the first preset temperature and the battery is in wired charging mode, the electronic device displays a prompt message.

[0289] The electronic device can determine that the battery is in a wired charging state after detecting that the voltage of the USB interface is greater than a voltage threshold. This step can be referred to the relevant description in step S1102, and will not be repeated here.

[0290] S1203. Upon receiving an operation to activate the battery heating function, the electronic device control switch unit Q1 1002 is disconnected in response to the operation.

[0291] S1204, Electronic Equipment Control Switch Unit Q2 1004 is turned on.

[0292] S1205. The electronic device detects whether the switching states of the switching unit Q1 1002 and the switching unit Q2 1004 are correct.

[0293] Steps S1203-S1205 can be referred to the relevant descriptions in steps S1103-S1105, and will not be repeated here.

[0294] S1206, The electronic device activates the battery heating function; wherein, the power supply 1301 (also known as the external power supply) can supply power to the coil 501 to achieve battery heating.

[0295] The electronic device can activate the battery heating function by: activating the wireless transceiver chip 305, which outputs a DC signal from the power supply 1301 as an AC signal; the coil 501 generates an electromagnetic signal based on the AC signal; and the battery 102 can generate eddy current losses based on the electromagnetic signal when the electromagnetic signal is received.

[0296] After the electronic device is connected to a power source via a USB interface, it can power the wireless transceiver chip.

[0297] The following description, in conjunction with Figure 13, illustrates the structure of wired and wireless charging in electronic devices, as shown in Figure 13:

[0298] Based on the heating circuit shown in Figure 10, a charging chip 304 may be included between the wireless transceiver chip 305 and the battery 102. When the electronic device charges the battery 102 via a power supply 1301, the power supply 1301 is connected to the electronic device's USB interface via an adapter, connecting cable, etc. As shown in Figure 13, the charging chip 304 is connected to the power supply 1301 via a charging switch. This charging switch can be an overvoltage protection (OVP) switch to prevent excessive input voltage.

[0299] During wired charging, the electronic device shuts down the wireless transceiver chip 305; the direction of current flow in the circuit can be shown by the dashed arrow in Figure 13 (process ①). The power supply 1301 inputs a DC signal to the charging chip 304 through the charging switch 1302. The charging chip 304 transmits the DC signal to the battery 102, and the battery 102 stores electrical energy.

[0300] In low-temperature environments, wired charging may damage the battery. Therefore, when wired charging is performed in low-temperature environments, the electronic device will control the charging chip 304 to shut down, and the charging function will be unusable. The charging chip 304 is shown as the dashed line module in Figure 13. After the charging chip 304 is shut down, a small amount of current or no current flows between the charging chip 304 and the battery 102.

[0301] At this point, the electronic device can heat the battery 102 in a low-temperature environment and with wired charging. The heating process is shown by the solid arrow (process ②) in Figure 13. During the heating process, the electronic device controls the wireless transceiver chip 305 to turn on (or enable). The wireless transceiver chip 305 can receive DC signals from the power supply 1301. The wireless transceiver chip 305 converts the DC signals into AC signals and inputs the AC signals into the second sub-circuit. The AC signals act on the coil 501, and the coil 501 converts the AC signals into electromagnetic signals. The battery 102 generates eddy current losses based on the electromagnetic signals, thereby increasing the battery temperature. The heating principle can be referred to the relevant description in Figure 6, and will not be repeated here.

[0302] It should be noted that the power supply 1301 can provide, for example, a 220V AC signal. The wired charging adapter can convert the AC signal into a DC signal and provide the DC signal to the charging chip 304 or the wireless transceiver chip 305. This application focuses on the charging chip 304 or the wireless transceiver chip 305 receiving the converted DC signal from the power supply 1301 and the subsequent operations using the DC signal; it does not focus on how the AC signal from the power supply is converted into a DC signal. Therefore, step S1206 is described as controlling the wireless transceiver chip 305 to output the DC signal from the power supply as an AC signal.

[0303] In summary, the difference between step S1206 and step S1106 is that: in the low-temperature, uncharged scenario, the electronic device uses its own battery 102 to provide power and heat the battery 102. In the low-temperature, wired charging scenario, the electronic device uses an external power source 1301 to provide power and heat the battery 102.

[0304] S1207. When the battery temperature is greater than the second preset temperature or the heating time is greater than the preset duration, the electronic device performs wired charging of the battery and turns off the battery heating function.

[0305] Referring again to Figure 13, once the battery temperature reaches the standard, the electronic device stops heating the battery. At this point, the electronic device can turn off the wireless transceiver chip 305 and perform wired charging of the battery based on the path of power supply 1301-charging switch 1302-charging chip 304-battery 102 (e.g., process ① shown by the dashed arrow).

[0306] It should be noted that when the current battery temperature is lower than the first preset temperature, the electronic device can turn off the charging chip 304, turn on the wireless transceiver chip 305, and heat the battery 102 based on process ② shown by the solid arrow in Figure 13.

[0307] As the battery temperature continues to rise, when the current temperature is greater than the first preset temperature but less than the third preset temperature (first preset temperature ≤ third preset temperature ≤ second preset temperature), the electronic device can simultaneously activate the charging chip 304 and the wireless transceiver chip 305. The DC signal from the power supply 1301 can be wired to charge the battery 102 via the charging chip 304, as shown by the dashed arrow ①. The DC signal from the power supply 1301 can also be powered to the coil 501 via the wireless transceiver chip 305 to heat the battery 102, as shown by the solid arrow ②.

[0308] If the current temperature exceeds the second preset temperature, the electronic device can shut down the wireless transceiver chip 305 to stop heating the battery; the DC signal from the power supply 1301 can be wired to charge the battery 102 via the charging chip 304, referring to process ① shown by the dashed arrow. This embodiment will not describe the wired charging and / or battery heating process in detail.

[0309] S1208, Electronic equipment control switch unit Q2 1004 is disconnected.

[0310] S1209, Electronic equipment control switch unit Q1 1002 is turned on.

[0311] Steps S1208 and S1209 can be referred to the relevant descriptions in steps S1108 and S1109, and will not be repeated here.

[0312] Optionally, after step S1201, the method further includes:

[0313] S1210. When the battery temperature is higher than the first preset temperature and the battery is in a wired charging state, the electronic device charges the battery via a power source.

[0314] Understandably, in non-low-temperature environments, electronic devices do not need to heat the battery and can directly perform the wired charging process.

[0315] It should be noted that this application embodiment also provides another heating method in a low-temperature wired charging scenario. Specifically, the electronic device can use the battery 102 to power and heat the battery 102 according to the process shown in FIG11. When the battery temperature reaches the second preset temperature, the electronic device turns off the battery heating function and uses the power supply 1301 to wire charge the battery 102. This application embodiment will not describe this in detail.

[0316] Figure 14 shows a schematic flowchart of another heating method provided in an embodiment of this application; as shown in Figure 14:

[0317] S1401, Electronic devices detect battery status and battery temperature.

[0318] This step can be referred to in the relevant description in step S1101, and will not be repeated here.

[0319] S1402. When the battery temperature is less than or equal to the first preset temperature and the battery is in wireless charging mode, the electronic device displays a prompt message.

[0320] After aligning the electronic device with the wireless charging device (e.g., placing the electronic device on the wireless charging device and aligning the coil of the electronic device with the coil of the wireless charging device), the wireless transceiver chip can generate voltage and current, and generate an interrupt signal; the electronic device can determine that the battery is in a wireless charging state after receiving the interrupt signal from the wireless transceiver chip. This step can be referred to the relevant description in step S1102, and will not be repeated here.

[0321] Optionally, the specific content of the prompts in steps S1202, S1302, and S1402 can be the same or different. This application embodiment does not impose any restrictions on this.

[0322] S1403. Upon receiving an operation to activate the battery heating function, the electronic device control switch unit Q1 1002 remains on in response to the operation.

[0323] In scenarios involving wireless charging and battery heating, electronic devices can simultaneously activate both functions, causing the first sub-circuit and the second sub-circuit to conduct. In this case, the switching states of switch units Q1 1002 and Q2 1004 are no longer mutually exclusive, and both units can remain on.

[0324] It should be noted that in both battery heating and wireless charging scenarios, coil 105 can receive electromagnetic signals from the coil of the wireless charging device. Coil 105 can generate an AC signal based on these electromagnetic signals. Part of the AC signal can be used to power coil 501, and part can be used to charge the battery. Here, switching unit Q1 1002 remains on to allow the AC signal to be transmitted to the wireless transceiver chip 305; switching unit Q2 1004 remains on to allow the AC signal to be transmitted to coil 501. This process will be described in detail in step S1406 later, and will not be repeated here.

[0325] S1404, Electronic Equipment Control Switch Unit Q2 1004 is turned on.

[0326] S1405. The electronic device detects whether the switching states of the switching unit Q1 1002 and the switching unit Q2 1004 are correct.

[0327] Steps S1403-S1405 can be referred to the relevant descriptions in steps S1103-S1105, and will not be repeated here.

[0328] S1406, The electronic device activates the battery heating function; wherein, the AC signal generated by coil 105 can power coil 501 to achieve battery heating.

[0329] After the electronic device activates the battery heating function, it may include: the electronic device converting an electromagnetic signal into an AC signal based on coil 105; converting the AC signal into an electromagnetic signal based on coil 501; and receiving the AC signal based on wireless transceiver chip 305.

[0330] The process of simultaneous wireless charging and battery heating is explained below with reference to Figure 15. As shown in Figure 15:

[0331] After aligning the electronic device with the wireless charging device, coil 105 can receive electromagnetic signals from the wireless charging device; coil 105 can convert the battery signal into an AC signal; at this time, part of the AC signal can be used to charge battery 102, and part of the AC signal can be used to heat battery 102. Specifically, on one hand, coil 105 can transmit the AC signal to wireless transceiver chip 305 (this process can be referred to as process ① shown by the dashed arrow in Figure 15), and wireless transceiver chip 305 converts the AC signal into a DC signal to charge battery 102. On the other hand, coil 105 can transmit the AC signal to coil 501 (this process can be referred to as process ② shown by the solid arrow in Figure 15); after receiving the AC signal, coil 501 converts the AC signal into an electromagnetic signal; after receiving the electromagnetic signal, battery 102 generates eddy currents and heats up, thereby raising the temperature of battery 102.

[0332] It should be noted that in step S1406, the electrical signal generated by coil 105 can both charge battery 101 and power coil 501. However, in real-world scenarios, in low-temperature environments, the charging chip 304 in the electronic device may be in a switched-off state to reduce the risk of damage to the battery from low-temperature charging. The electronic device can first heat battery 102 before charging it.

[0333] Specifically, when the current battery temperature is lower than the first preset temperature, the electronic device shuts down the charging chip 304, and there is a small amount of current or no current between the wireless transceiver chip 305 and the battery 102. The AC signal generated by the coil 105 mainly flows through the coil 501 to power the coil 501 (process ② shown by the solid arrow in Figure 15). The electronic device heats the battery 102.

[0334] As the battery temperature continues to rise, when the current temperature is greater than the first preset temperature but less than the third preset temperature, the electronic device can simultaneously activate the charging chip 304 and the wireless transceiver chip 305. The AC signal from the coil 105 can be wirelessly charged for the battery 102 via the wireless transceiver chip 305, as shown by the dashed arrow ①. The AC signal from the coil 105 can also be used to power the coil 501 to heat the battery 102, as shown by the solid arrow ②.

[0335] If the battery temperature exceeds a second preset temperature, the electronic device can stop heating the battery 102 and disconnect the second sub-circuit. At this time, the AC signal from the coil 105 is used to wirelessly charge the battery, as shown in step S1407.

[0336] S1407. When the battery temperature is greater than the second preset temperature or the heating time is greater than the preset duration, the electronic device wirelessly charges the battery and turns off the battery heating function.

[0337] S1408, Electronic equipment control switch unit Q2 1004 is disconnected.

[0338] S1408, Electronic Equipment Control Switch Unit Q1 1002 is turned on.

[0339] It should be noted that after step S1403, the electronic device can turn on the switching unit Q1 1002. Step S1408 can be understood as: the electronic device maintains the conducting state of the switching unit Q1 1002; step S1408 can also be understood as: when the heating of the battery 102 stops, the switching unit Q1 1002 is turned off, and then the switching unit Q1 1002 is turned on again to confirm that the switching unit Q1 1002 is in the conducting state. This application embodiment does not limit this.

[0340] It is understood that in the embodiments shown in Figures 12 and 14, the charging process and the battery heating process are coupled, allowing the electronic device to perform both processes simultaneously. In this embodiment, the charging and battery heating processes can also be decoupled, allowing the electronic device to heat the battery first, and then charge it after the battery temperature reaches a certain level. Specifically, in low-temperature environments and charging scenarios, the electronic device can employ, for example, the process shown in Figure 11, using the battery 102 to power the coil 501 to heat the battery 102; after the battery temperature reaches a second preset temperature, the battery heating function is turned off, and the wireless charging function is activated to charge the battery 102. This solution can be a combination of the embodiments shown in Figure 11 and Figure 3, and will not be elaborated further in this embodiment.

[0341] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation portals are provided for users to choose to authorize or refuse.

[0342] The battery heating method according to the embodiments of this application has been described above. The apparatus for performing the above-described battery heating method provided in the embodiments of this application will now be described. Those skilled in the art will understand that the methods and apparatus can be combined with and referenced in each other, and the related apparatus provided in the embodiments of this application can perform the steps in the above-described battery heating method.

[0343] As shown in Figure 16, the battery heating device 1600 can be used in communication equipment, circuits, hardware components, or chips. The battery heating device includes a display unit 1601 and a processing unit 1602. The display unit 1601 is used to support the display steps performed by the battery heating device 1600; the processing unit 1602 is used to support the information processing steps performed by the battery heating device 1600.

[0344] In a possible implementation, the battery heating device 1600 may also include a communication unit 1603. Specifically, the communication unit supports the battery heating device 1600 in performing data transmission and data reception steps. The communication unit 1603 may be an input or output interface, pins, or circuitry, etc.

[0345] In a possible embodiment, the battery heating device may further include a storage unit 1604. The processing unit 1602 and the storage unit 1604 are connected via a line. The storage unit 1604 may include one or more memories, which may be devices in one or more devices or circuits used for storing programs or data. The storage unit 1604 may exist independently and be connected to the processing unit 1602 of the battery heating device via a communication line. Alternatively, the storage unit 1604 may be integrated with the processing unit 1602.

[0346] Storage unit 1604 may store computer-executable instructions for the methods in the terminal device, so that processing unit 1602 executes the methods in the above embodiments. Storage unit 1604 may be a register, cache, or RAM, etc., and storage unit 1604 may be integrated with processing unit 1602. Storage unit 1604 may be a read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, and storage unit 1604 may be independent of processing unit 1602.

[0347] The battery heating method provided in this application can be applied to electronic devices with communication functions. Electronic devices include electronic devices in general; the specific device form of an electronic device can be referred to the above-described related information, and will not be repeated here.

[0348] This application provides an electronic device, which includes a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, causing the electronic device to perform the above-described method.

[0349] This application provides a chip system including at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a circuit. The at least one processor is used to run computer programs or instructions to execute the above-described method. Its implementation principle and technical effects are similar to the related embodiments described above, and will not be repeated here.

[0350] This application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, it implements the methods described above. The methods described in the above embodiments can be implemented wholly or partially by software, hardware, firmware, or any combination thereof. If implemented in software, the functionality can be stored as one or more instructions or code on or transmitted over the computer-readable medium. The computer-readable medium can include computer storage media and communication media, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium accessible by a computer.

[0351] In one possible implementation, a computer-readable medium may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage or other magnetic storage devices, or any other medium targeted to carry or to store the required program code in the form of instructions or data structures, and accessible by a computer. Furthermore, any connection is appropriately referred to as a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, disks and optical discs include optical discs, laser discs, optical discs, Digital Versatile Discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs optically reproduce data using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0352] This application provides a computer program product, which includes a computer program that, when run, causes a computer to perform the above-described method.

[0353] This application describes embodiments with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, special-purpose computer, embedded processor, or other programmable device to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing device, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0354] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery heating device, characterized in that, include: A first coil is used to wirelessly charge the battery; A first magnetic conductive unit is located on the side of the first coil facing the battery; A second coil is located on the side of the first magnetically conductive unit facing the battery; Used to generate an alternating magnetic field to heat the battery.

2. The battery heating device according to claim 1, characterized in that, The battery includes a metal outer layer; the metal outer layer is used to sense electromagnetic signals from the second coil and generate eddy current losses to heat the battery.

3. The battery heating device according to claim 2, characterized in that, The battery heating device also includes: A first chip, connected to a second coil, is used to receive a first DC signal when heating the battery, convert the first DC signal into a first AC signal, and input the first AC signal to the second coil. The second coil is also used to receive the first AC signal and generate the first electromagnetic signal.

4. The battery heating device according to claim 3, characterized in that, The battery heating device also includes the battery, which is connected to the first chip and is used to input the first DC signal to the first chip.

5. The battery heating device according to claim 3, characterized in that, The battery heating device also includes an external power supply, which is connected to the first chip and is used to input the first DC signal to the first chip.

6. The battery heating device according to claim 1, characterized in that, The battery heating device further includes a first chip, which is connected to the first coil; The first coil is specifically used to receive a second electromagnetic signal and generate a second AC signal when wirelessly charging the battery; The first chip is also used to convert the second AC signal into a second DC signal and input the second DC signal to the battery.

7. The battery heating device according to claim 6, characterized in that, The second coil is connected to the first chip and in parallel with the first coil. Specifically, it is used to receive the second AC signal and generate a third electromagnetic signal when heating the battery and wirelessly charging it.

8. The battery heating device according to any one of claims 3-7, characterized in that, The battery heating device further includes: A first switching unit is disposed between the first chip and the first coil; A second switching unit is disposed between the first chip and the second coil; During the process of heating the battery and when the battery is not being charged, the first switch unit is in the open state and the second switch unit is in the closed state. Alternatively, during the process of heating and wired charging of the battery, the first switching unit is in the open state and the second switching unit is in the closed state; Alternatively, when the battery is not heated and is being wirelessly charged, the first switch unit is in a closed state and the second switch unit is in an open state. Alternatively, during the process of heating the battery and wirelessly charging, the first switch unit is in a closed state. The second switch unit is in the closed state.

9. The battery heating device according to any one of claims 3-8, characterized in that, The first coil includes a first tap; the second coil includes a second tap; The first tap is used to connect the first coil to the first chip; the second tap is used to connect the second coil to the first chip; wherein, the first tap and the second tap are connected, or the first tap and the second tap are not connected.

10. The battery heating device according to any one of claims 1-9, characterized in that, The battery heating device also includes: The first graphite layer is located on the side of the second coil facing the battery.

11. The battery heating device according to any one of claims 3-10, characterized in that, A first capacitor is also provided between the first coil and the first chip; the first capacitor is used to adjust the frequency of the second AC signal. A second capacitor is also provided between the second coil and the first chip; the second capacitor is used to adjust the frequency of the first AC signal; the first capacitor is different from the second capacitor, and the frequency of the first AC signal is different from the frequency of the second AC signal; the frequency of the first AC signal is positively correlated with the heating rate of the battery.

12. An electronic device, characterized in that, The electronic device includes: a first coil, a first magnetic conductive unit, a second coil, and a battery; The first coil is used to wirelessly charge the battery; The first magnetically conductive unit is located on the side of the first coil facing the battery; The second coil is located on the side of the first magnetically conductive unit facing the battery; it is used to generate an alternating magnetic field to heat the battery.

13. The electronic device according to claim 12, characterized in that, The battery includes a metal outer layer; the metal outer layer is used to sense electromagnetic signals from the second coil and generate eddy current losses to heat the battery.

14. The electronic device according to claim 13, characterized in that, The electronic device also includes a first chip; The first chip is connected to the battery and the second coil respectively, and is used to receive a first DC signal when heating the battery, convert the first DC signal into a first AC signal, and input the first AC signal to the second coil. The second coil is specifically used to receive the first AC signal and generate the first electromagnetic signal.

15. The electronic device according to claim 14, characterized in that, The battery is used to input the first DC signal to the first chip when the battery is heated and the battery is not charged.

16. The electronic device according to claim 14, characterized in that, The electronic device is connected to an external power source. The first chip is used to connect to the external power source and receive the first DC signal input from the external power source when heating the battery and charging it via wired connection.

17. The electronic device according to claim 13, characterized in that, The first chip is also connected to the battery and the first coil, respectively; The first coil is specifically used to receive a second electromagnetic signal and generate a second AC signal when wirelessly charging the battery; The first chip is also used to convert the second AC signal into a second DC signal and input the second DC signal to the battery.

18. The electronic device according to claim 17, characterized in that, The second coil is connected to the first chip and in parallel with the first coil. Specifically, it is used to receive the second AC signal and generate a third electromagnetic signal when heating the battery and wirelessly charging it.

19. The electronic device according to any one of claims 14-18, characterized in that, The electronic device further includes a processor, a first switching unit disposed between the first chip and the first coil, and a second switching unit disposed between the first chip and the second coil; The processor is configured to control the first switching unit to open and the second switching unit to close during the process of heating the battery and when the battery is not being charged. Alternatively, the processor is further configured to control the first switching unit to open and the second switching unit to close during the process of heating and wired charging the battery. Alternatively, the processor is further configured to control the first switch unit to close and the second switch unit to open during the process of wirelessly charging the battery without heating the battery. Alternatively, the processor is further configured to control the closing of the first switching unit and the closing of the second switching unit during the heating and wireless charging of the battery.

20. The electronic device according to any one of claims 14-19, characterized in that, The first coil includes a first tap; the second coil includes a second tap; The first tap is used to connect the first coil to the first chip; the second tap is used to connect the second coil to the first chip; wherein, the first tap and the second tap are connected, or the first tap and the second tap are not connected.

21. The electronic device according to any one of claims 12-20, characterized in that, The electronic device also includes: The first graphite layer is located on the side of the second coil facing the battery.

22. The electronic device according to any one of claims 14-21, characterized in that, A first capacitor is also provided between the first coil and the first chip; the first capacitor is used to adjust the frequency of the second AC signal. A second capacitor is also provided between the second coil and the first chip; the second capacitor is used to adjust the frequency of the first AC signal; the first capacitor is different from the second capacitor, and the frequency of the first AC signal is different from the frequency of the second AC signal; the frequency of the first AC signal is positively correlated with the heating rate of the battery.

23. The electronic device according to any one of claims 12-22, characterized in that, The electronic device further includes a screen, a mid-frame, and a back cover; the mid-frame is located on the side of the screen facing the battery; the back cover is located on the side of the first coil away from the first magnetic conductive unit.

24. A battery heating system, characterized in that, The battery heating system includes the electronic device and the wireless charging device as described in any one of claims 12-23; the electronic device includes the first coil, the first chip, the second coil, and the battery; the wireless charging device is used to wirelessly charge the electronic device; the wireless charging device includes a third coil. The third coil is used to generate the second electromagnetic signal; The first coil is used to receive the second electromagnetic signal and generate a second alternating current signal; The first chip is used to convert the second AC signal into a second DC signal and input the second DC signal to the battery; The second coil is used to receive the second AC signal and generate a third electromagnetic signal when heating the battery.

25. A battery heating device, characterized in that, include: A first coil is used to wirelessly charge the battery; A first magnetic conductive unit is located on the side of the first coil facing the battery; A second coil is located on the side of the battery away from the first magnetically conductive unit; it is used to generate an alternating magnetic field to heat the battery.

26. The battery heating device according to claim 25, characterized in that, The battery heating device also includes: The second magnetic conductive unit is located on the side of the second coil away from the battery.

27. The battery heating device according to claim 25 or 26, characterized in that, The battery heating device also includes: The first graphite layer is located on the side of the first magnetically conductive unit facing the battery; And / or, a second graphite layer, located on the side of the second coil facing the battery.

28. An electronic device, characterized in that, The electronic device includes: a first coil, a first magnetic conductive unit, a second coil, and a battery; The first coil is used to wirelessly charge the battery; The first magnetically conductive unit is located on the side of the first coil facing the battery; The second coil is located on the side of the battery away from the first magnetically conductive unit; it is used to generate an alternating magnetic field to heat the battery.

29. The electronic device according to claim 28, characterized in that, The electronic device also includes: The second magnetic conductive unit is located on the side of the second coil away from the battery.

30. The electronic device according to claim 28 or 29, characterized in that, The electronic device also includes: The first graphite layer is located on the side of the first magnetically conductive unit facing the battery; And / or, a second graphite layer, located on the side of the second coil facing the battery.

31. The electronic device according to any one of claims 28-30, characterized in that, The electronic device further includes a screen, a mid-frame, and a back cover; the mid-frame is located on the side of the screen facing the second magnetic conductive unit, and the back cover is located on the side of the first coil away from the first magnetic conductive unit.

32. A battery heating method, characterized in that, Applied to any one of claims 12-23 or 28-31, the method comprises: When the battery temperature is detected to be less than or equal to a first preset temperature, the second coil is controlled to generate an alternating magnetic field to heat the battery. If the battery temperature is detected to be higher than the second preset temperature, the second coil is controlled to stop generating an alternating magnetic field; the second preset temperature is higher than the first preset temperature.

33. The method according to claim 32, characterized in that, Before controlling the second coil to use an alternating magnetic field to heat the battery, the method further includes: Detect the battery status and the battery temperature; the battery status includes non-charging status, wired charging status, and wireless charging status; When the battery is in the uncharged state and the battery temperature is less than or equal to the first preset temperature, the first switch unit is controlled to open and the second switch unit is controlled to close. The control of the second coil to heat the battery using an alternating magnetic field includes: The battery inputs a first DC electrical signal to the first chip; The first chip converts the first DC signal into a first AC signal and outputs it to the second coil. Input the first AC signal; The second coil generates a first electromagnetic signal based on the first AC signal; After controlling the second coil to stop generating the alternating magnetic field, the following steps are included: Control the second switch unit to open, and control the first switch unit to close.

34. The method according to claim 33, characterized in that, Before controlling the first switch unit to open and the second switch unit to close, the method further includes: Display a first prompt message, which is used to prompt the user whether to heat the battery when the battery temperature is less than or equal to the first preset temperature; The control of the first switch unit to open and the control of the second switch unit to close include: In response to an operation to activate battery heating, the first switching unit is controlled to open, and the second switching unit is controlled to close.

35. The method according to claim 33 or 34, characterized in that, The method of controlling the second switch unit to open and controlling the first switch unit to close further includes: If the battery temperature is less than or equal to the second preset temperature and the duration of heating the battery is greater than the preset duration, the second switch unit is controlled to open and the first switch unit is controlled to close.

36. The method according to claim 32, characterized in that, Before controlling the second coil to use an alternating magnetic field to heat the battery, the method further includes: When the battery is in wired charging mode and the battery temperature is less than or equal to the first preset temperature, the first switch unit is controlled to open and the second switch unit is controlled to close. The control of the second coil to heat the battery using an alternating magnetic field includes: The first chip receives a first DC signal from an external power source, converts the first DC signal into a first AC signal, and inputs the first AC signal into the second coil. The second coil generates a first electromagnetic signal based on the first AC signal; After controlling the second coil to stop generating the alternating magnetic field, the following steps are included: Control the second switch unit to open, and control the first switch unit to close.

37. The method according to claim 32, characterized in that, Before controlling the second coil to generate an alternating magnetic field to heat the battery, the method further includes: When the battery is in wireless charging mode and the battery temperature is less than or equal to the first preset temperature, the first switch unit is controlled to close, and the second switch unit is controlled to close. The control of the second coil to generate an alternating magnetic field for heating the battery includes: The first coil receives the second electromagnetic signal and generates a second alternating current signal; The second coil receives the second AC signal and generates a third electromagnetic signal; After controlling the second coil to stop heating the battery, the process includes: The second switch unit is controlled to open, while the first switch unit remains closed.

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