Battery heating device, method and related equipment

Abstract

The embodiment of the invention provides a battery heating device and method and related equipment. The battery heating device comprises a magnetic conductive unit which is located on one side of a battery; the first coil is positioned on one side, facing the battery, of the magnetic conduction unit; and the inversion module is used for providing an alternating current signal for the first coil when receiving electric energy input, so that the first coil generates an alternating magnetic field to heat the battery. Therefore, the battery heating device can generate the alternating magnetic field to enable the metal on the outer layer of the battery to generate eddy-current loss, so that the battery is heated, and the cruising ability of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a battery heating device, method and related equipment. Background Art

[0002] Electronic devices may be equipped with batteries, which can be used to store and provide electrical energy. For example, an electronic device can charge a battery through a power source. An electronic device can also use a battery to power multiple functions, such as making calls and taking photos. An electronic device can also use a battery to charge other devices.

[0003] However, in some implementations, the battery life of electronic devices is poor. For example, in low-temperature environments, the battery's charging and discharging performance decreases; the power consumption of electronic devices increases, and the charging speed slows down; the battery cannot power electronic devices for a long time, affecting the user experience. Summary of the Invention

[0004] The embodiments of the present application provide a battery heating device, method, and related equipment, which are applied to the field of terminal technology. In a low-temperature environment, an alternating magnetic field is generated by a coil to heat the battery, thereby improving the battery life.

[0005] In a first aspect, an embodiment of the present application provides a battery heating device, which includes: a magnetic conductive unit 302, a first coil (coil 301) and an inverter module 804; Figure 3 As shown: the magnetic conductive unit is located on one side of the battery 104; the coil 301 is located on the side of the magnetic conductive unit 302 facing the battery 104; the inverter module 804 is used to provide an AC signal to the coil 301 when receiving electrical energy input, so that the coil 301 generates an alternating magnetic field to heat the battery 104.

[0006] Understandably, when battery 104 is in an alternating magnetic field, the metal within battery 104 can generate eddy current losses, causing the battery to heat up. Because some electronic devices do not support wireless charging, they are unable to convert DC signals into AC signals. To address the battery life issues of these electronic devices in low-temperature environments, the battery heating device can be equipped with an inverter module 804; inverter module 804 can be used to provide an AC signal to coil 301.

[0007] In this way, the battery heating device can generate an alternating magnetic field to cause eddy current loss in the metal layer of the battery's outer layer, thereby heating the battery and improving the battery's endurance.

[0008] Optionally, the battery heating device further includes a battery 104; the battery 104 includes a metal outer layer (e.g., an aluminum-plastic film 201); the metal outer layer is configured to sense the electromagnetic signal from the coil 301 and generate eddy current losses to heat the battery 104. Thus, the inclusion of metal in the battery enables the battery to generate eddy current losses in an alternating magnetic field, thereby achieving battery heating.

[0009] Optionally, the battery heating device further includes: a power module 801; Figure 8 As shown, power module 801 is connected to inverter module 804. Power module 801 is used to input a DC signal to inverter module 804. In this embodiment of the present application, the DC signal can be VBUS or VBAT. Specifically, when the battery is charging, power module 801 can provide VBUS; when the battery is not charging, power module 801 can provide VBAT. In this way, power module 801 can supply DC power to inverter module 804, so that inverter module 804 can convert the DC signal into an AC signal.

[0010] Optionally, the power module 801 includes: a battery 104; when the battery heating device has no external power supply, the battery heating device can use the electric energy of the battery 104 to heat itself. Specifically, the battery 104 can be used to input a first DC signal (VBAT) to the inverter module 804 when the battery temperature is less than or equal to a first preset temperature (the battery 104 is in a low temperature environment) and the battery 104 is in an uncharged state. The inverter module 804 is specifically used to convert the first DC signal (VBAT) into a first AC signal and input the first AC signal to the coil 301; the coil 301 is specifically used to receive the first AC signal and generate a first electromagnetic signal. The first AC signal and the first electromagnetic signal are related to VBAT. In this way, when the battery 104 is in a low temperature and uncharged environment, the battery 104 can be used to power the battery heating device and heat the battery 104 itself, thereby improving the battery life.

[0011] Optionally, the power supply module 801 includes: an external power supply; when the battery heating device is externally powered, the battery heating device can use the electric energy of the external power supply to heat the battery 104. Specifically, the external power supply is used to input a second DC signal (VBUS) to the inverter module 804 when the battery temperature is less than or equal to the first preset temperature (the battery 104 is in a low-temperature environment) and the battery 104 is in a charging state. The inverter module 804 is specifically used to convert the second DC signal (VBUS) into a second AC signal and input the second AC signal to the coil 301; the coil 301 is specifically used to receive the second AC signal and generate a second electromagnetic signal. The second AC signal and the second electromagnetic signal are related to VBUS. In this way, when the battery 104 is in a low-temperature charging environment, an external power supply can be used to power the battery heating device to heat the battery 104, thereby improving the battery life.

[0012] Optionally, the battery heating device further includes a first switch unit (such as Figure 8 The switch selection module 803 in, and / or Figure 9 The first switch unit (Q3) is located between the power module 801 and the inverter module 804 and serves to open or close the path between the power module 801 and the inverter module 804. The battery heating device also includes a control module 802, which can be used to control the opening and closing of the path between the power module 801 and the inverter module 804. For example, the control module 802 can be used to control the first switch unit to be turned on when the battery temperature is less than or equal to a first preset temperature (the battery 104 is in a low-temperature environment); and to control the first switch unit to be turned off when the battery temperature is greater than a second preset temperature (the preset value to which the battery 104 is heated); the first preset temperature is lower than the second preset temperature. In this way, by controlling the opening and closing of the first switch unit, the battery heating device can heat the battery in a low-temperature environment and stop heating when the battery temperature rises to the second preset temperature.

[0013] Optionally, the power module 801 specifically includes: a second switch unit (eg, switch unit Q1), and a third switch unit (eg, switch unit Q2), such as Figure 9As shown, switch unit Q1 is connected to the external power interface (VBUS interface) and switch selection module 803 respectively; switch unit Q2 is connected to battery 104 (VBAT) and switch selection module 803 respectively. When battery 104 is charging, switch unit Q1 is in the on state and switch unit Q2 is in the off state, so that VBUS is connected to the circuit; when battery 104 is not charging, switch unit Q1 is in the off state and switch unit Q2 is in the on state, so that VBAT is connected to the circuit. In this way, the corresponding power source can be selected according to the battery status, thereby improving charging efficiency.

[0014] It should be noted that the electronic device includes a charging chip (charger chip), which is connected to both the battery 104 and the external power source. When the temperature is low, the charger chip is disabled, rendering the external power source unable to charge the electronic device. If the battery 104 is still used to power the battery heating device while it is charging, this will increase the power consumption of the battery 104 and affect charging efficiency. Therefore, while the battery 104 is charging, the external power source can be used to supplement the power, and the battery 104 can be charged after the temperature reaches the enabling temperature of the charger chip.

[0015] Optionally, the power module 801 specifically includes: a first diode (eg, diode D1) and a second diode (eg, diode D2), such as Figure 10 As shown in Figure a, diode D1 is connected to the external power supply interface (VBUS interface) and switch selection module 803, respectively; diode D2 is connected to battery 104 (VBAT) and switch selection module 803, respectively. This allows power module 801 to automatically adjust its output voltage based on the magnitude of the two voltages, thereby reducing external control. Automatic adjustment of the output voltage of power module 801 can, for example, occur when VBUS is greater than VBAT during charging, with power module 801 outputting VBUS; when not charging, VBUS is 0, with power module 801 outputting VBAT.

[0016] Optionally, the battery heating device further includes: a graphite layer 303, the graphite layer 303 is located on the side of the coil 301 facing the battery 104, such as Figure 3 In this way, the magnetic field strength in the middle of the coil 301 is stronger, causing the heat in the middle of the battery 104 to be higher, and the graphite layer 303 can quickly conduct the heat in the middle to both sides of the battery 104, achieving a uniform heat dissipation effect.

[0017] Optionally, the metal outer layer of the battery 104 includes an aluminum-plastic film 201. It is understood that the embodiment of the present application does not limit the metal material of the outermost metal outer layer of the battery, and the metal material of the metal outer layer of the battery 104 can be aluminum or other metal materials.

[0018] In a second aspect, an embodiment of the present application provides 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, a smart TV, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc.

[0019] The electronic device includes: a magnetic conductive unit 302, a first coil (coil 301) and an inverter module 804; Figure 3 As shown, the magnetic conductive unit is located on one side of the battery 104; the coil 301 is located on the side of the magnetic conductive unit 302 facing the battery 104; and the inverter module 804 is used to provide an AC signal to the coil 301 when receiving power input, causing the coil 301 to generate an alternating magnetic field to heat the battery 104. In this way, the electronic device can generate an alternating magnetic field to cause eddy current losses in the metal layer of the battery's outer layer, thereby heating the battery and improving its battery life.

[0020] Optionally, the electronic device further includes a battery 104; the battery 104 includes a metal outer layer (e.g., an aluminum-plastic film 201); the metal outer layer is used to sense the electromagnetic signal from the coil 301 and generate eddy current loss to heat the battery 104. In this way, the inclusion of metal in the battery enables the battery to generate eddy current loss in an alternating magnetic field, thereby achieving battery heating.

[0021] Optionally, the electronic device further includes: a power supply module 801; Figure 8As shown: the power module 801 is connected to the inverter module 804, and the power module 801 is used to input a DC signal to the inverter module 804. In the embodiment of the present application, the DC signal can be VBUS or VBAT; specifically, when the battery is in a charging state, the power module 801 can provide VBUS; when the battery is in an uncharged state, the power module 801 can provide VBAT. In this way, the power module 801 can supply DC power to the inverter module 804, so that the inverter module 804 can convert the DC signal into an AC signal.

[0022] Optionally, the power module 801 includes: a battery 104; when the electronic device has no external power supply, the electronic device can use the power of the battery 104 to heat itself. Specifically, the battery 104 can be used to input a first DC signal (VBAT) to the inverter module 804 when the battery temperature is less than or equal to a first preset temperature (the battery 104 is in a low temperature environment) and the battery 104 is in an uncharged state. The inverter module 804 is specifically used to convert the first DC signal (VBAT) into a first AC signal, and input the first AC signal to the coil 301; the coil 301 is specifically used to receive the first AC signal and generate a first electromagnetic signal. The first AC signal and the first electromagnetic signal are related to VBAT. In this way, when the battery 104 is in a low temperature and uncharged environment, the battery 104 can be used to power the coil 301 and heat the battery 104 itself, thereby improving the battery life.

[0023] Optionally, the power module 801 includes: an external power supply; when the electronic device is externally powered, the electronic device can use the electric energy of the external power supply to heat the battery 104. Specifically, the external power supply is used to input a second DC signal (VBUS) to the inverter module 804 when the battery temperature is less than or equal to the first preset temperature (the battery 104 is in a low temperature environment) and the battery 104 is in a charging state. The inverter module 804 is specifically used to convert the second DC signal (VBUS) into a second AC signal and input the second AC signal to the coil 301; the coil 301 is specifically used to receive the second AC signal and generate a second electromagnetic signal. The second AC signal and the second electromagnetic signal are related to VBUS. In this way, when the battery 104 is in a low-temperature charging environment, an external power supply can be used to power the coil 301 to heat the battery 104, thereby improving the battery life.

[0024] Optionally, the electronic device further includes a first switch unit (such as Figure 8 The switch selection module 803 in, and / or Figure 9The first switch unit (Q3) is located between the power module 801 and the inverter module 804 and serves to open or close the path between the power module 801 and the inverter module 804. The electronic device also includes a control module 802, which can be used to control the opening and closing of the path between the power module 801 and the inverter module 804. For example, the control module 802 can be used to control the first switch unit to be turned on when the battery temperature is less than or equal to a first preset temperature (the battery 104 is in a low-temperature environment); and to control the first switch unit to be turned off when the battery temperature is greater than a second preset temperature (the preset value to which the battery 104 is heated); the first preset temperature is lower than the second preset temperature. In this way, by controlling the opening and closing of the first switch unit, the electronic device can heat the battery in a low-temperature environment and stop heating when the battery temperature rises to the second preset temperature.

[0025] Optionally, the power module 801 specifically includes: a second switch unit (eg, switch unit Q1), and a third switch unit (eg, switch unit Q2), such as Figure 9 As shown, switch unit Q1 is connected to the external power interface (VBUS interface) and switch selection module 803 respectively; switch unit Q2 is connected to battery 104 (VBAT) and switch selection module 803 respectively. When battery 104 is charging, switch unit Q1 is in the on state and switch unit Q2 is in the off state, so that VBUS is connected to the circuit; when battery 104 is not charging, switch unit Q1 is in the off state and switch unit Q2 is in the on state, so that VBAT is connected to the circuit. In this way, the corresponding power source can be selected according to the battery status, thereby improving charging efficiency.

[0026] Optionally, the power module 801 specifically includes: a first diode (eg, diode D1) and a second diode (eg, diode D2), such as Figure 10 As shown in Figure a, diode D1 is connected to the external power supply interface (VBUS interface) and switch selection module 803, respectively; diode D2 is connected to battery 104 (VBAT) and switch selection module 803, respectively. This allows power module 801 to automatically adjust its output voltage based on the magnitude of the two voltages, thereby reducing external control. Automatic adjustment of the output voltage of power module 801 can, for example, occur when VBUS is greater than VBAT during charging, with power module 801 outputting VBUS; when not charging, VBUS is 0, with power module 801 outputting VBAT.

[0027] Optionally, the electronic device further includes: a graphite layer 303, the graphite layer 303 is located on the side of the coil 301 facing the battery 104, such as Figure 3In this way, the magnetic field strength in the middle of the coil 301 is stronger, causing the heat in the middle of the battery 104 to be higher, and the graphite layer 303 can quickly conduct the heat in the middle to both sides of the battery 104, achieving a uniform heat dissipation effect.

[0028] Optionally, the metal outer layer of the battery 104 includes an aluminum-plastic film 201. It is understood that the embodiment of the present application does not limit the metal material of the outermost metal outer layer of the battery, and the metal material of the metal outer layer of the battery 104 can be aluminum or other metal materials.

[0029] Optionally, the electronic device further includes: a screen 101, a middle frame 102 and a back shell 103, such as Figure 6 As shown: the back shell 103 is located on the side of the magnetic conductive unit 302 facing away from the coil 301; the middle frame 102 is located on the side of the battery 104 facing away from the coil 301; and the screen 101 is located on the side of the middle frame 102 facing away from the battery 104. In this way, the battery heating device can be placed close to the battery 104, allowing the alternating magnetic field generated by the coil 301 to act on the aluminum-plastic film 201 of the battery 104, thereby generating eddy current losses to increase the battery temperature.

[0030] Optionally, the electronic device further includes: a screen 101, a middle frame 102 and a back shell 103, such as Figure 5 As shown: the back cover 103 is located on the side of the battery 104 facing away from the coil 301; the middle frame 102 is located on the side of the magnetic conductive unit 302 facing away from the coil 301; and the screen 101 is located on the side of the middle frame 102 facing away from the magnetic conductive unit 302. In this way, the battery heating device can be placed close to the battery 104, allowing the alternating magnetic field generated by the coil 301 to act on the aluminum-plastic film 201 of the battery 104, thereby generating eddy current losses to increase the battery temperature.

[0031] In a third aspect, embodiments of the present application provide a battery heating method, applicable to the electronic device described in the second aspect. The method comprises: upon detecting that the battery temperature is less than or equal to a first preset temperature, controlling coil 301 to generate an alternating magnetic field to heat battery 104; upon detecting that the battery temperature is greater than a second preset temperature, controlling coil 301 to cease generating the alternating magnetic field; the second preset temperature is greater than the first preset temperature. In this way, the electronic device can heat battery 104 in low-temperature environments, thereby improving battery life. After the battery temperature rises to a certain level, battery 104 can be used normally, and heating of battery 104 can be stopped to prevent the battery 104 from overheating.

[0032] Optionally, before controlling the first coil to generate an alternating magnetic field to heat the battery, the method includes:

[0033] When the battery 104 is uncharged, the power module 801 is controlled to input a first DC signal (VBAT) to the inverter module 804. If the battery temperature is detected to be less than or equal to a first preset temperature (the battery 104 is in a low-temperature environment), the switch selection module 803 is controlled to conduct. The coil 301 is controlled to generate an alternating magnetic field to heat the battery. This process involves: the inverter module 804 converting the first DC signal (VBAT) into a first AC signal; and the first coil generating a first electromagnetic signal based on the first AC signal. In this way, when the electronic device is uncharged, the battery 104 can be used to power the coil 301 to heat the battery.

[0034] Optionally, before the control coil 301 generates an alternating magnetic field to heat the battery 104 , the following steps are included:

[0035] When the battery 104 is charging, the power module 801 is controlled to input a second DC signal (VBUS) to the inverter module 804. If the battery temperature is detected to be less than or equal to a first preset temperature, the switch selection module 803 is controlled to conduct. The coil 301 is controlled to generate an alternating magnetic field to heat the battery 104. This process involves: the inverter module 804 converting the second DC signal (VBUS) into a second AC signal; and the coil 301 generating a second electromagnetic signal based on the second AC signal. This allows the electronic device to use an external power source to power the coil 301 and heat the battery while charging.

[0036] Optionally, before controlling the first switch unit to conduct, the process further includes: displaying a prompt message, the prompt message being used to prompt the user whether to enable battery heating when the battery temperature is less than or equal to a first preset temperature; the prompt message including a first control (a control for enabling the battery heating function); and controlling the switch selection module 803 to conduct, including: controlling the switch selection module 803 to conduct in response to a triggering operation on the first control. In this way, the user can be prompted whether to enable the battery heating function in low-temperature environments, and the battery heating process can be enabled or disabled based on the user's selection, thereby improving the user experience.

[0037] Optionally, controlling the coil 301 to stop generating the alternating magnetic field includes controlling the switch selection module 803 to turn off. In this way, heating the battery 104 can be stopped after the battery 104 is heated to a certain temperature, thereby reducing the possibility of the battery 104 being damaged by excessive temperature.

[0038] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method of the first aspect.

[0039] In a fifth aspect, an embodiment of the present application provides a computer program product, which comprises a computer program. When the computer program is run, the computer program causes a computer to execute the method according to the first aspect.

[0040] In a sixth aspect, an embodiment of the present application provides a chip system, which comprises at least one processor and a communication interface. The communication interface and the at least one processor are interconnected through a line. The at least one processor is configured to run a computer program or an instruction to execute the method according to the first aspect.

[0041] It should be understood that the fourth aspect to the sixth aspect of the present application correspond to the technical solution of the third aspect of the present application. The beneficial effects achieved by each aspect and the corresponding feasible implementation manners are similar, and will not be repeated. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A structural schematic diagram of an electronic device 100 in a possible implementation manner is shown in FIG. 1.

[0043] Figure 2 A structural schematic diagram of a battery in a possible implementation manner is shown in FIG. 2.

[0044] Figure 3 A structural schematic diagram of a battery heating device provided by an embodiment of the present application is shown in FIG. 3.

[0045] Figure 4 A heating principle schematic diagram of a battery heating device provided by an embodiment of the present application is shown in FIG. 4.

[0046] Figure 5 A structural schematic diagram of an electronic device 100 provided by an embodiment of the present application is shown in FIG. 5.

[0047] Figure 6 A structural schematic diagram of another electronic device 100 provided by an embodiment of the present application is shown in FIG. 6.

[0048] Figure 7 A structural schematic diagram of still another electronic device 100 provided by an embodiment of the present application is shown in FIG. 7.

[0049] Figure 8 A structural schematic diagram of a battery heating circuit in an embodiment of the present application is shown in FIG. 8.

[0050] Figure 9 A structural schematic diagram of a battery heating circuit in an embodiment of the present application is shown in FIG. 9.

[0051] Figure 10 A structural schematic diagram of another battery heating circuit in an embodiment of the present application is shown in FIG. 10.

[0052] Figure 11 A flow schematic diagram of a battery heating method in an embodiment of the present application is shown in FIG. 11.

[0053] Figure 12 A schematic structural diagram of an electronic device 100 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] To facilitate a clear description of the technical solutions of the embodiments of the present application, some of the terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0055] 1. Electronic devices

[0056] The electronic devices of the embodiments of the present application may include handheld devices, vehicle-mounted devices, etc. with image processing functions. For example, some electronic devices include: mobile phones, tablet computers, PDAs, laptop computers, 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 a wireless modem, in-vehicle devices (such as car computers), wearable devices, electronic devices in 5G or future evolution of public land mobile communications (PLMCs), and the like. The electronic devices in the network (PLMN) are not limited to this in the embodiments of the present application.

[0057] As an example and not a limitation, in the embodiments of the present application, the electronic device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as hearing aids, glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0058] In addition, in the embodiment of the present application, 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 man and machine and the interconnection of things.

[0059] The electronic devices in the embodiments of the present 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.

[0060] 2. Structure of electronic equipment

[0061] The following briefly describes the structure of an electronic device, taking a mobile phone as an example. Figure 1 As shown:

[0062] For ease of explanation, the electronic device 100 is placed as follows Figure 1 As shown in Figure a, the electronic device 100 may include a screen 101, a middle frame 102, and a back shell (also referred to as a battery cover, rear shell, etc.) 30. The screen 101 or back shell 103 of the electronic device 100 may be parallel to the xy plane. For example, if the z value of the plane where the screen 101 is located is less than the z value of the plane where the back shell 103 is located, the electronic device 100 displays the middle frame 102 and back shell 103, and the screen 101 is obscured by the back shell 103.

[0063] Referring to the placement of the electronic device 100, Figure 1Figure b shows the internal structure of electronic device 100; electronic device 100 may specifically include: screen 101, midframe 102, battery 104, and back cover 103. The planes on which any of these components reside may be parallel to the xy plane, and the z values ​​of the planes on which these components reside increase in sequence. In other words, motherboard 105 and battery 104 may be located between midframe 102 and back cover 103.

[0064] The screen 101 is used to display images.

[0065] The middle frame 102 is used to support and protect the internal components of the electronic device 100. The middle frame 102 may include a first part 1021, a second part 1022 and a third part 1023; wherein the first part 1021, the second part 1022 and the third part 1023 are arranged in sequence along the negative direction of the y-axis, the first part 1021 is connected to the second part 1022, and the second part 1022 is connected to the third part 1023; at least one side of any two parts of the first part 1021, the second part 1022 and the third part 1023 are on the same plane; the thickness of the first part 1021 and the third part 1023 along the z-direction is the same, and the thickness of the second part 1022 along the z-direction is less than the thickness of the first part 1021 and the third part 1023 along the z-direction.

[0066] The first part 1021 is used to set the camera, audio devices, etc.; the second part 1022 can be a battery compartment for stably placing the battery; the third part 1023 is used to set the audio devices, USB interface and some sensors, etc.

[0067] The mainboard 105 may be located on a side of the first portion 1021 of the middle frame 102 facing the back housing 103 .

[0068] The mainboard 105 may be used to connect and control various components to support the electronic device 100 in running multiple functions.

[0069] The battery 104 is located on the second portion of the middle frame 102 facing the back shell 103 and is used to store and provide electrical energy.

[0070] The back cover 103 is used to protect internal components of the electronic device 100 .

[0071] 3. Magnetic conductive unit: It can be nanocrystal (also known as iron-based nanocrystalline soft magnetic material). Nanocrystal is an alloy composed of five materials: iron, silicon, boron, copper, and niobium (Fe, Si, B, Cu, Nb). It forms a magnetic material between amorphous and crystalline. The crystal size of this magnetic material is about 10nm, hence the name nanocrystal.

[0072] Nanocrystals can be applied in the wireless coil of mobile phones. The nanocrystals have a high saturation magnetic induction intensity, which can reach 1.2-1.4 Tesla (T); at the same time, they have a very high magnetic permeability, and the relative magnetic permeability can reach tens of thousands. In the case of a magnetic field generated by a coil, nanocrystals can be used for shielding a magnetic loop, guiding a magnetic loop, and enhancing the inductance of a coil. The thickness of a single layer of nanocrystals is about ten microns. In actual application, electronic devices can also use multiple layers of nanocrystals to improve the power of wireless charging and avoid saturation.

[0073] 4. Battery: Figure 2 Figure a in the above illustrates the structure of a battery 104. The battery 104 can include a positive electrode sheet 205, a separator 206, a negative electrode sheet 207, and an aluminum plastic film 201. Among them, the internal cell of the battery 104 is stacked in order by the positive electrode sheet 205, the separator 206, and the negative electrode sheet 207; the outside is packaged with the aluminum plastic film 201; the positive and negative tabs 203 and 204 are respectively welded at the insulating sheets 202 on both sides, and the electrolyte 208 is injected into the cell and sealed.

[0074] The aluminum plastic film 201 (also known as an aluminum plastic film for lithium ion batteries) is a packaging material for soft-packaged lithium ion batteries, which has the advantages of puncture resistance, corrosion resistance, high temperature resistance, and good barrier property. The aluminum plastic film 201 protects the internal materials of the lithium ion battery, and the soft-packaged lithium ion battery has the advantages of high safety performance, light weight, thin thickness, and high energy density, and has been widely used in the fields of 3C intelligent digital products, new energy electric vehicles, and energy storage equipment.

[0075] The aluminum plastic film 201 is usually composed of multiple layers of materials, for example, Figure 2 Figure b in the above illustrates a structure diagram of the aluminum plastic film 201. The outermost layer of the aluminum plastic film 201 is an outer barrier layer 2011, which is usually composed of nylon (PA) or polyethylene terephthalate (PET), and is used to protect the middle aluminum foil from being scratched and reduce damage to the battery caused by external factors such as collision. The middle of the aluminum plastic film 201 is a barrier layer 2013, which is usually composed of an aluminum foil and is used to prevent oxygen and moisture from entering. The innermost layer of the aluminum plastic film 201 is a heat-sealing layer 2014, which is usually modified from cast polypropylene (CPP) and plays a role in sealing and bonding. The outer barrier layer 2011 and the barrier layer 2013 are bonded by a bonding (SFL) layer 2012, and the heat-sealing layer 2014 and the barrier layer 2013 are bonded by the SFL layer 2012.

[0076] 5. Other terms

[0077] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0078] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items 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, c can be single or multiple.

[0079] It should be noted that the "at..." in the embodiments of the present application can be the instant when a certain situation occurs, or it can be a period of time after the situation occurs, and the embodiments of the present application do not specifically limit this. In addition, the display interface provided in the embodiments of the present application is only an example, and the display interface can also include more or less content.

[0080] The battery's charging and discharging performance at low temperatures is lower than at room temperature. This is because the low temperature reduces the activity of the active substances involved in the chemical reactions in the battery, increasing the battery's internal resistance and increasing the energy loss during the charge and discharge process, leading to the following problematic scenarios.

[0081] Problem scenarios include, for example, when users use electronic devices outdoors in cold areas, the remaining battery power drops quickly, resulting in a shorter battery life. Another example is when users charge electronic devices in cold environments, the battery power increases slowly, resulting in low charging efficiency.

[0082] In a possible implementation, at low temperatures, the various components in electronic devices can generate heat during operation. This heat can, to a certain extent, raise the battery temperature, slowing the degradation of battery performance and improving both charging and discharging performance. However, this method relies on the electronic device's own heat generation, resulting in a slow and insufficient temperature increase. Even after heating, the battery still has significant internal resistance, making this heating method less effective.

[0083] In light of this, embodiments of the present application provide a battery heating device that heats the battery by placing the battery in an alternating magnetic field, causing the metal in the battery to generate heat through eddy currents. To achieve this battery heating function, a metal layer must be present in the battery and the battery must be in an alternating magnetic field.

[0084] Among them, the aluminum-plastic film of the battery may include aluminum metal, which can generate eddy currents in an alternating magnetic field; at the same time, the aluminum-plastic film wraps the internal materials of the battery in the outer layer, which can transfer heat more evenly to various positions of the battery, allowing the battery to heat up quickly in a low-temperature environment.

[0085] Furthermore, a coil fed with an AC signal can generate an alternating magnetic field. Some electronic devices may support wireless charging, and these devices may use a wireless charging chip to convert the DC signal into an AC signal, allowing the coil to generate an alternating magnetic field based on the AC signal. Other electronic devices may not support wireless charging and may include an inverter circuit to convert the DC signal into an AC signal, allowing the coil to generate an alternating magnetic field based on the AC signal.

[0086] It should be noted that in the embodiments of the present application, the electronic device capable of implementing the battery heating function may be an electronic device that does not support the wireless charging function. For such electronic devices, the embodiments of the present application provide a battery heating device and method for heating the battery in a low-temperature environment.

[0087] To facilitate understanding of the technical solutions of the embodiments of the present application, Figure 3 The battery heating device in the embodiment of the present application is described.

[0088] The battery heating device may include a coil 301, a magnetic conductive unit 302, a graphite layer 303, and a battery 104. The coil 301 may be located on the side of the magnetic conductive unit 302 facing the graphite layer 303, and the graphite layer 303 may be located on the side of the coil 301 facing the battery 104. The planes of the magnetic conductive unit 302, the coil 301, and the graphite layer 303 are parallel to each other and to the first surface of the battery 104. The first surface of the battery 104 may be, for example: Figure 1 FIG. 2 b shows the plane of the battery 104 in the xy direction.

[0089] The coil 301 can be used to generate an alternating magnetic field to heat the battery; the magnetic conductive unit 302 can be used to shield and guide the magnetic circuit to enhance magnetic induction; and the graphite layer 303 can be used to dissipate heat.

[0090] The following combination Figure 4 right Figure 3 The heating principle of the battery heating device shown is explained as follows: Figure 4 As shown:

[0091] In a low temperature scenario, the electronic device 100 can control the coil 301 to pass an AC signal. After the power is applied, the coil 301 can convert the AC signal into an electromagnetic signal, thereby forming an alternating magnetic field. Taking the current magnetic field direction from the center of the coil 301 to the periphery of the coil 301 as an example, the multiple magnetic flux lines in the magnetic field and the direction of the magnetic flux lines can be as follows: Figure 4 Most of the magnetic flux lines are located below the magnetic conductive unit 302 ; some of the magnetic flux lines pass through the magnetic conductive unit 302 to form a magnetic loop, and some of the magnetic flux lines pass through the graphite layer 303 to reach the surface of the battery 104 .

[0092] like Figure 2 As shown, the outer surface of the battery 104 may include an aluminum-plastic film 201, and the barrier layer 2013 of the aluminum-plastic film 201 includes metal, such as aluminum. Aluminum can sense electromagnetic signals and generate eddy currents. The eddy currents in the battery 104 may be as follows: Figure 4 As shown in the dotted box in , the aluminum metal converts the electromagnetic signal into heat energy through eddy current, heats the inside of the battery, increases the temperature of the battery 104, and thus improves the battery performance.

[0093] In the embodiment of the present application, there is no or a small amount of magnetic flux lines above the magnetic conductive unit 302 because: the magnetic conductive unit 302 has a very high magnetic permeability; when the magnetic flux lines pass through the magnetic conductive unit 302, the magnetic conductive unit 302 can guide the magnetic flux lines to pass through the interior of the magnetic conductive unit 302, forming a magnetic field. Figure 4 In this way, the magnetic conductive unit 302 can guide the magnetic loop, reduce the magnetic flux lines above the magnetic conductive unit 302, and make most of the magnetic flux lines concentrate between the magnetic conductive unit 302 and the battery 104, thereby enhancing the magnetic field strength induced by the aluminum metal in the battery 104.

[0094] In the embodiment of the present application, the specifications of the graphite layer 303 can be equal to those of the battery 104, or slightly smaller than those of the battery 104. The graphite layer 303 has a wide contact area with the battery 104, and the graphite layer 303 has good thermal conductivity, which can quickly and evenly transfer the heat generated by the eddy current to the entire battery 104, thereby rapidly heating the battery 104.

[0095] It is understood that when coil 301 generates a magnetic field, the magnetic induction intensity in the middle of coil 301 is greater than the magnetic induction intensity outside coil 301. Therefore, when heating battery 104, the aluminum metal in the middle of battery 104 generates higher eddy current losses, and the temperature in the middle of battery 104 is higher than that on both sides. Here, the graphite layer 303 is placed between coil 301 and battery 104. Graphite layer 303 can quickly transfer heat from the middle of battery 104 to both sides of battery 104, thereby achieving uniform heat dissipation.

[0096] Optionally, in the battery heating device, the graphite layer 303 may not be included between the coil 301 and the battery 104; since aluminum metal has good thermal conductivity and is relatively evenly wrapped around the outer layer of the battery 104, after the aluminum metal generates heat loss, the electronic device may also use the aluminum metal to evenly transfer the heat to the entire battery 104, thereby achieving rapid heating of the battery 104; this process may not involve the graphite layer 303 for heat conduction.

[0097] In this way, the battery heating device can generate an alternating magnetic field to cause eddy current loss in the metal layer of the battery outer layer, thereby heating the battery.

[0098] It should be noted that in possible implementations, some electronic devices may support wireless charging and may also include a coil module. The charging coil in this coil module is used to wirelessly charge the battery. Therefore, the selection of the charging coil prioritizes the conductive properties of the material. For example, the charging coil can be made of copper. Furthermore, to reduce energy loss during energy conversion, the cross-sectional area of ​​the wire in the charging coil can be larger to reduce impedance. However, in the embodiment of the present application, coil 301 is used to generate an alternating magnetic field to heat the battery, not to transmit electrical signals. Therefore, coil 301 in the embodiment of the present application differs from the coil in the possible implementation.

[0099] For example, in an embodiment of the present application, the cross-sectional area of ​​the wire in the coil 301 may be smaller than the cross-sectional area of ​​the wire in the charging coil; this is because in an embodiment of the present application, the coil 301 is mainly used for heating, and the cross-sectional area of ​​the wire in the coil 301 is smaller, so the impedance that the coil 301 can provide increases. On the one hand, the electronic device can use the coil 301 to generate an alternating magnetic field and heat the battery through the eddy current thermal effect; on the other hand, the impedance of the coil 301 increases, and the energy loss of the coil 301 itself increases, and this part of the lost energy can be converted into heat energy; the electronic device can generate heat through the coil 301 and transfer the heat to the battery 104 to further improve the battery heating efficiency. In an embodiment of the present application, the material, thickness, and number of turns of the coil 301 can be set according to factors such as cost, thickness, and manufacturability, and the embodiment of the present application does not limit them.

[0100] The following combination Figures 5-7 The position of the battery heating device in the electronic device will be described.

[0101] Figure 5 FIG. 1 shows a schematic structural diagram of an electronic device 100 provided in an embodiment of the present application. Figure 5 As shown:

[0102] The electronic device 100 may include a screen 101, a middle frame 102, a battery 104, and a back shell 103; the middle frame 102 may be located on the side of the screen 101 facing the battery 104, and the battery 104 may be located on the side of the back shell 103 facing the middle frame 102; the positional relationship between the screen 101, the middle frame 102, the battery 103, and the back shell 103 may be as follows: Figure 5 As shown in Figure a.

[0103] In the first implementation, the battery heating device can be disposed between the battery 104 and the midframe 102. The battery heating device can include a coil 301, a magnetic conductive unit 302, and a graphite layer 303. The magnetic conductive unit 302 can be located on the side of the midframe 102 facing the battery 104; the coil 301 can be located on the side of the magnetic conductive unit 302 facing the battery 104; and the graphite layer 303 can be located on the side of the coil 301 facing the battery 104.

[0104] That is to say, referring to Figure 5 As shown in Figure a, the above-mentioned devices of the electronic device 100 all have a plane parallel to the xy plane; along the z-axis direction (from left to right in the figure), the screen 101, the middle frame 102, the magnetic conductive unit 302, the coil 301, the graphite layer 303, the battery 104 and the back shell 103 can be arranged in sequence.

[0105] Figure 5 Figure b in the figure more intuitively shows the stacking structure between multiple devices, with the electronic device 100 using Figure 1 Taking the placement shown in a in the figure as an example, the electronic device can be arranged from bottom to top in order: screen 101, middle frame 102, magnetic conductive unit 302, coil 301, graphite layer 303, battery 104 and back shell 103.

[0106] In this way, the battery heating device can be placed close to the battery, so that the alternating magnetic field generated by the coil can act on the aluminum-plastic film of the battery, thereby increasing the battery temperature by generating eddy current losses.

[0107] It is understood that the second portion 1022 of the middle frame 102 may be a battery compartment, which may be a device for storing and managing batteries. The battery 104 may be placed in the second portion 1022 of the middle frame to improve the stability of the battery 104 in the electronic device 100. In a first implementation, a battery heating device may be provided between the battery compartment of the middle frame 102 and the battery 104.

[0108] In order to improve the stability and reliability of the battery 104, an embodiment of the present application provides a structural schematic diagram of another electronic device 100. In the embodiment of the present application, the battery heating device can be set between the back shell 103 and the battery 104, instead of between the middle frame 102 and the battery 104, so as to increase the fit between the battery 104 and the second part 1022 of the middle frame 102.

[0109] For example, the present application embodiment provides a structural diagram of another electronic device 100. Figure 6 As shown:

[0110] The electronic device 100 may include a screen 101, a middle frame 102, a battery 104, and a back shell 103; the middle frame 102 may be located on the side of the screen 101 facing the battery 104, and the battery 104 may be located on the side of the back shell 103 facing the middle frame 102; the positional relationship between the screen 101, the middle frame 102, the battery 103, and the back shell 103 may be as follows: Figure 6 As shown in Figure a.

[0111] In a second implementation, the battery heating device may be disposed between the battery 104 and the back cover 103. The battery heating device may include a coil 301, a magnetic conductive unit 302, and a graphite layer 303. The magnetic conductive unit 302 may be located on the side of the back cover 103 facing the battery 104; the coil 301 may be located on the side of the magnetic conductive unit 302 facing the battery 104; and the graphite layer 303 may be located on the side of the coil 301 facing the battery 104.

[0112] That is to say, referring to Figure 6 As shown in Figure a, there is a plane parallel to the xy plane in any device of the electronic device 100; along the z-axis direction (from left to right in the figure), the screen 101, the middle frame 102, the battery 104, the graphite layer 303, the coil 301, the magnetic conductive unit 302 and the back shell 103 can be arranged in sequence.

[0113] Figure 6 Figure b in the figure more intuitively shows the stacking structure between multiple devices, with the electronic device 100 using Figure 1 Taking the placement shown in a in the figure as an example, the electronic device can be arranged from bottom to top in order: screen 101, middle frame 102, battery 104, graphite layer 303, coil 301, magnetic conductive unit 302 and back shell 103.

[0114] In this way, the battery heating device can be placed close to the battery, so that the alternating magnetic field generated by the coil can act on the aluminum-plastic film of the battery, thereby increasing the battery temperature by generating eddy current losses.

[0115] In addition, in order to increase the heating rate of the battery, multiple battery heating devices may be provided in the electronic device in the embodiment of the present application. Figure 7 FIG. 1 shows a structural diagram of another electronic device 100 provided in an embodiment of the present application. Figure 7 As shown:

[0116] The electronic device 100 can include a screen 101, a middle frame 102, a battery 104, and a back cover 103; the middle frame 102 can be located on a side of the screen 101 facing the battery 104, and the battery 104 can be located on a side of the back cover 103 facing the middle frame 102; the positional relationship of the screen 101, the middle frame 102, the battery 103, and the back cover 103 can be as shown in FIG. a of Figure 7 .

[0117] In a third implementation manner, the electronic device can be provided with two battery heating devices, for example, a first battery heating device and a second battery heating device. The first battery heating device can be arranged between the battery 104 and the back cover 103, and the second battery heating device can be arranged between the battery 104 and the middle frame 102. The first battery heating device can include a coil 301, a magnetic conduction unit 302, and a graphite layer 303; and the second battery heating device can include a coil 701, a magnetic conduction unit 702, and a graphite layer 703.

[0118] The magnetic conduction unit 302 can be located on a side of the back cover 103 facing the battery 104; the coil 301 can be located on a side of the magnetic conduction unit 302 facing the battery 104; and the graphite layer 303 can be located on a side of the coil 301 facing the battery 104. The magnetic conduction unit 702 can be located on a side of the middle frame 102 facing the battery 104; the coil 701 can be located on a side of the magnetic conduction unit 702 facing the battery 104; and the graphite layer 703 can be located on a side of the coil 701 facing the battery 104.

[0119] That is, referring to the structure shown in FIG. a of Figure 7 , a plane parallel to the x-y plane exists in each of the above-mentioned devices of the electronic device 100; and from bottom to top, the screen 101, the middle frame 102, the magnetic conduction unit 702, the coil 701, the graphite layer 703, the battery 104, the graphite layer 303, the coil 301, the magnetic conduction unit 302, and the back cover 103 can be arranged in sequence along the z-axis direction (from left to right in the figure).

[0120] Figure 7 FIG. b of Figure 1 more intuitively shows the stacking structure between the multiple devices. For example, the electronic device 100 is placed in the manner shown in FIG. a of Figure 1 , and from bottom to top, the screen 101, the middle frame 102, the magnetic conduction unit 702, the coil 701, the graphite layer 703, the battery 104, the graphite layer 303, the coil 301, the magnetic conduction unit 302, and the back cover 103 can be arranged in sequence.

[0121] In this way, the battery heating device can be arranged close to the battery, so that the alternating magnetic field generated by the coil can act on the aluminum plastic film of the battery, and then the battery can be heated by generating eddy current loss.

[0122] Optionally, the battery heating device of any of the three electronic devices mentioned above may not include a graphite layer and / or a magnetic conductive unit. For example, in the first implementation, the electronic device may not include the graphite layer 303; the electronic device may not include the magnetic conductive unit 302; or the electronic device may not include the magnetic conductive unit 302 and the graphite layer 303. Similarly, in the second implementation, the electronic device may not include the graphite layer 303 and / or the magnetic conductive unit 302. In the third implementation, the electronic device may not include the magnetic conductive unit 302, the graphite layer 303, the magnetic conductive unit 702 and / or the magnetic conductive unit 703. This embodiment of the present application does not impose any restrictions on this.

[0123] In some embodiments, the electronic device may not support wireless charging. In this case, the electronic device may not be able to directly reuse the wireless charging chip to convert the DC signal into the AC signal. For this type of electronic device, the embodiment of the present application provides an electronic device capable of heating the battery. The specific structure of the electronic device is as follows: Figure 8 As shown:

[0124] The electronic device may include a power module 801, a control module 802, a switch selection module 803, an inverter module 804, and a coil 301. The power module may be configured to provide a direct current (DC) signal; the switch selection module 803 may have an off state and an on state. When the switch selection module 803 is in the on state, the electronic device can heat the battery using an alternating magnetic field; when the switch selection module 803 is in the off state, the electronic device does not perform the battery heating process. The inverter module 804 may be configured to convert the DC signal into an alternating current (AC) signal; and the coil 301 may be configured to receive the AC signal and generate an electromagnetic signal.

[0125] The control module 802 can be used to control the power module 801, the switch selection module 803, and / or the inverter module 804. Furthermore, the control module 802 can be used to control the output type of the DC signal of the power module 801; control the on / off state of the switch selection module 803; and / or control the direction of the AC signal of the inverter module 804.

[0126] In this embodiment of the present application, the power module 801 may include a battery 104 and an external power supply. The battery 104 may provide a battery voltage (VBAT) to the electronic device, while the external power supply may provide an external charging voltage (also known as a voltage bus, VBUS for short) to the electronic device.

[0127] It is understandable that a user may use an electronic device in a low-temperature environment while the electronic device is not charging; in this case, the electronic device can rely on its own electrical energy to power the battery heating device. In this case, the DC signal of the power module 801 can be derived from the battery 104. Furthermore, a user may use an electronic device in a low-temperature environment while the electronic device is charging; in this case, the electronic device can rely on the electrical energy of an external power supply to power the battery heating device. In this case, the DC signal of the power module 801 can be derived from the external power supply.

[0128] It should be noted that, since the electronic device does not support the wireless charging function, the electronic device in the embodiment of the present application is in a charging state that can be: the electronic device is in a wired charging state; for example, the electronic device can be connected to an external power source through a USB interface and an adapter.

[0129] Optionally, to simplify the logic control process of the electronic device during the battery heating process, the control module may not control the power module 801 and / or the inverter module 804. For example, the power module 801 may adaptively switch between the VBAT power supply and the VBUS power supply, and / or the inverter module 804 may adaptively switch the direction of the AC power signal. This will be described in detail later in the embodiments of this application and will not be elaborated here.

[0130] In the embodiment of the present application, since the electronic device does not support wireless charging, the electronic device cannot obtain the AC signal required for the coil 301 to generate an alternating magnetic field. Based on this, in the embodiment of the present application, the electronic device can be provided with an inverter module 804 to provide an AC signal to the coil 301.

[0131] The following combination Figure 9 and Figure 10 The battery heating circuit is described in combination with two inverter modules.

[0132] Figure 9 A battery heating circuit provided by an embodiment of the present application is shown. Figure 9 As shown, the battery heating circuit includes a power module 801 , a control module 802 , a switch selection module 803 , an inverter module 804 and a coil 301 .

[0133] Exemplarily, the control module 802 can control the power module 801 to output VBUS or VBAT. For example, if the control module 802 detects that the electronic device is not charging, the control module 802 can control the power module 801 to output VBAT, in which case the source of the DC signal is the battery 104; if the control module 802 detects that the electronic device is charging, the control module 802 can control the power module 801 to output VBUS, in which case the source of the DC signal is the external power supply.

[0134] The control process can be referred to Figure 9The power module 801 in FIG. 1 may include a switch unit Q1 and a switch unit Q2. When the control module 802 detects that the electronic device is in a charging state, the control module 802 controls the switch unit Q1 to be turned on and the switch unit Q2 to be turned off, so that the power module 801 outputs VBUS. When the control module 802 detects that the electronic device is not in a charging state, the control module 802 controls the switch unit Q1 to be turned off and the switch unit Q2 to be turned on, so that the power module 801 outputs VBAT.

[0135] The switch selection module 803 may include a switch unit Q3, the control end of the switch unit Q3 is connected to the control module 802, the first end of the switch unit Q3 is connected to the output end of the power supply module 801 (for example, point B), and the second end of the switch element Q3 is connected to the input end of the inverter module 804 (for example, point A).

[0136] In one scenario, when the battery temperature is less than or equal to a first preset temperature, the control module 802 controls the switch unit Q3 to operate in the saturation region, causing the switch selection module 803 to switch from the off state to the on state to heat the battery. In another scenario, when the battery temperature is greater than the first preset temperature, the control module 802 controls the switch unit Q3 to operate in the cutoff region, causing the switch selection module 803 to remain in the off state, thereby preventing the battery from being heated in a non-low-temperature environment. In yet another scenario, when the battery temperature is greater than a second preset temperature, the control module 802 controls the switch unit Q3 to operate in the cutoff region, causing the switch selection module 803 to switch from the on state to the off state, thereby stopping heating the battery after the battery reaches the second preset temperature; wherein the first preset temperature is lower than the second preset temperature.

[0137] The above control logic can be understood as follows: when the switch selection module 803 is in the off state, the temperature threshold for switching the switch selection module state can be a first preset temperature; when the battery temperature drops to the first preset temperature, the control module 802 controls the switch selection module 803 to turn on. When the switch selection module 803 is in the on state, the temperature threshold for switching the switch selection module state can be a second preset temperature; when the battery temperature rises to the second preset temperature, the control module 802 controls the switch selection module 803 to turn off.

[0138] It should be noted that the switch unit Q3 can be a MOS transistor or other switching device. Exemplarily, the switch element Q3 can be a PMOS transistor. Specifically, the control end of the switch element Q3 refers to the gate of the switch element Q3, the first end of the switch element Q3 refers to the source of the switch element Q3, and the second end of the switch element Q3 refers to the drain of the switch element Q3. The switch element Q3 can also be an NMOS transistor. Specifically, the control end of the switch element Q3 refers to the gate of the switch element Q3, the first end of the switch element Q3 refers to the source of the switch element Q3, and the second end of the switch element Q3 refers to the drain of the switch element Q3.

[0139] In one possible implementation, the inverter module 804 may be as follows: Figure 9 As shown in the large dotted box, the inverter module 804 may include a switch unit Q4, a switch unit Q5, a switch unit Q6 and a switch unit Q7.

[0140] Taking the inverter module 804 as an example, including a full-bridge inverter circuit, the inverter module 804 may include switch units Q4, Q5, Q6, and Q7, each of which has its control end connected to the control module 802; a first end of switch unit Q4 connected to a second end of switch unit Q5, and a second end of switch unit Q4 connected to the output end of switch selection module 803 and the second end of switch unit Q6, respectively; a first end of switch unit Q5 connected to the output end of switch selection module 803 and the first end of switch unit Q7, respectively; and a first end of switch unit Q6 connected to the second end of switch unit Q7. Furthermore, the first end of switch unit Q4 and the second end of switch unit Q5 are both connected to the first end of coil 301, and the first end of switch unit Q6 and the second end of switch unit Q7 are both connected to the second end of coil 301.

[0141] The control module 802 can control the on and off of the switch units Q4, Q5, Q6 and Q7; wherein the switch states of the switch units Q4 and Q7 change synchronously, and the switch states of the switch units Q5 and Q6 change synchronously.

[0142] It is understandable that the principle of the control module 802 controlling the on and off of the switch units Q4, Q5, Q6 and Q7 can refer to the on and off process of the switch unit Q3, and will not be further described in the embodiment of the present application.

[0143] Specifically, control module 802 can adjust the switching state of the switch unit through a control signal. At a first point in time, control module 802 can control switch units Q5 and Q6 to be in the off state, and switch units Q4 and Q7 to be in the on state. In this case, the DC signal provided by power supply 801 reaches point A after passing through switch unit Q3. Thereafter, the DC signal can pass through switch unit Q4, coil 301, capacitor C1, and switch unit Q7 in sequence. Capacitor C1 and coil 301 can adjust the resonant frequency, and the electrical signal received by coil 301 increases from a small value and then decreases from a large value.

[0144] At the second time point, control module 802 can control switch units Q4 and Q7 to be off, and switch units Q5 and Q6 to be on. In this case, the DC signal provided by power supply 801 reaches point A after passing through switch unit Q3. Thereafter, the DC signal can pass through switch unit Q6, capacitor C1, coil 301, and switch unit Q5 in sequence. Capacitor C1 and coil 301 can adjust the resonant frequency, and the electrical signal received by coil 301 increases from a small value and then decreases from a large value.

[0145] The control module 802 controls the periodic on and off of the switch units Q4, Q5, Q6 and Q7 to periodically switch the phase of the electrical signal and generate an AC signal. The coil 301 can receive the AC signal and generate an electromagnetic signal.

[0146] At this point, the electronic device can control the coil 301 through the above circuit to generate an electromagnetic signal, so that the aluminum metal in the battery can sense the electromagnetic signal and generate an eddy current thermal effect to heat the battery.

[0147] It should be noted that the switch unit Q3-switch unit Q2 and the switch unit Q3 can be any controllable component or device with a switching function that can realize path conversion and on-off control functions, such as a semiconductor switch, a relay, or an optocoupler; wherein the semiconductor switch can be, for example, a metal oxide semiconductor (MOS) tube or a transistor. When the switch unit is a MOS tube, it can be an NMOS tube or a PMOS tube. When the switch unit is a transistor, it can be a PNP transistor or an NPN transistor, which is not limited in the embodiments of the present application.

[0148] It is understandable that Figure 9 The inverter module 804 needs to cooperate with the control module 802 to realize the process of converting the DC signal into the AC signal. Figure 10 Provides a battery heating circuit that simplifies external control, such as Figure 10 As shown:

[0149] existFigure 10 In Figure a, the battery heating circuit includes a power module 801, a control module 802, a switch selection module 803, an inverter module 804, and a coil 301. The power module 801 is connected to the switch selection module 803, which is connected to the inverter module 804, which is connected to the coil 301.

[0150] Exemplarily, the power module 801 may include a VBUS power supply, a VBAT power supply, a diode D1, and a diode D2; wherein the first end of the diode D1 is connected to the VBUS power supply, and the second end of the diode D1 is connected to the switch selection module 803; the first end of the diode D2 is connected to the VBAT power supply, and the second end of the diode D2 is connected to the switch selection module 803. The first end of the diode D1 may be an anode terminal, and the second end of the diode D1 may be a cathode terminal; the first end of the diode D2 may be an anode terminal, and the second end of the diode D2 may be a cathode terminal.

[0151] In one scenario, when the electronic device is heating the battery, the battery is uncharged. VBUS is zero, and the voltage at the first end of diode D1 is zero. The battery has residual power, so VBAT is greater than VBUS. The voltage at the first end of diode D2 is greater than the forward conduction voltage of diode D2, and diode D2 conducts forward, making the voltage at the second end of diode D2 (e.g., point B voltage) equal to the VBAT voltage. For diode D1, the voltage at the first end of diode D1 is less than the voltage at the second end of diode D1 (e.g., point B voltage), causing diode D1 to be cut off. At this point, power module 801 automatically outputs VBAT.

[0152] In another case, when the electronic device is heating the battery, the battery is in a charging state. VBUS is not zero. In actual scenarios, when the electronic device is performing wired charging, the VBUS voltage is higher than the VBAT voltage so that the external power supply can power the battery. The voltage at the first end of the diode D1 is greater than the forward conduction voltage of the diode D1. The diode D1 is forward-conducted, and the voltage at the second end of the diode D1 can be VBUS, and the voltage at point B is equal to VBUS. Since VBUS>VBAT, the voltage at the first end of the diode D2 (VBAT) is less than the voltage at the second end of the diode D2 (for example, the voltage at point B, VBUS), causing the diode D2 to be cut off. At this time, the power module 801 automatically outputs VBUS.

[0153] In this way, the power module 801 can automatically adjust the output voltage of the power module 801 according to the magnitudes of the two voltages, thereby reducing external control.

[0154] After the power module 801 outputs the VBAT or VBUS direct current signal, the direct current signal can be input into the inverter module 804 through the on-state switch selection module 803 to make the inverter module 804 convert the direct current signal into an alternating current signal and provide the alternating current signal to the coil to generate an electromagnetic signal.

[0155] In the process, the conduction process of the switch selection module 803 can refer to the related description in the embodiments shown in the drawings. Figure 9 The process will not be described here again.

[0156] In the process, to simplify the external control of the inverter module 804, the inverter module 804 can be, for example, Figure 10 as shown in the large dashed box in FIG. a;

[0157] Exemplarily, the inverter module 804 can include a resistor R1, a resistor R2, an inductor L1, an inductor L2, a diode D3, a diode D4, a switch unit Q8, a switch unit Q9, and a capacitor C2.

[0158] For example, the conduction time of the switch unit Q8 is less than the conduction time of the switch unit Q9. The inductor L1 and the inductor L2 are used to store and release electric energy. The resistor R1 can be used to control the voltage and / or current input to the control end of the switch unit Q8 to avoid damage to the device caused by excessive voltage and / or current; the resistor R2 can be used to adjust the voltage and / or current input to the control end of the switch unit Q9 to avoid damage to the device caused by excessive voltage and / or current. The switch unit Q8 and the switch unit Q9 can be used to adjust the direction of the alternating current signal of the input coil 301. The diode D3 can be used to set the voltage input to the control end of the switch unit Q9 to zero to turn off the switch unit Q9. The diode D4 can be used to set the voltage input to the control end of the switch unit Q8 to zero to turn off the switch unit Q8. The capacitor C2 is used to resonate with the coil 301.

[0159] Specifically, the input end of inductor L1 is connected to the output end of switch selection module 803, and the output end of inductor L1 is respectively connected to the second end of switch unit Q8, the first end of capacitor C2, and the first end of coil 301. The input end of inductor L2 is connected to the output end of switch selection module 803, and the output end of inductor L2 is respectively connected to the second end of switch unit Q9, the second end of capacitor C2, and the second end of coil 301. The input end of resistor R1 is connected to the output end of switch selection module 803, and the output end of resistor R1 is connected to the control end of switch unit Q8. The input end of resistor R2 is connected to the output end of switch selection module 803, and the output end of resistor R2 is connected to the control end of switch unit Q9. The first end of switch unit Q8 is connected to the first end of switch unit Q9, and the first end of switch unit Q8 and the first end of switch unit Q9 are both connected to ground. The first end of diode D3 is connected to the output end of resistor R2, and the second end of diode D3 is connected to the second end of switch unit Q8. A first end of the diode D4 is connected to the output end of the resistor R1 , and a second end of the diode D4 is connected to the second end of the switch unit Q9 .

[0160] It should be noted that in the embodiment of the present application, the first end of diode D3 can be the anode of diode D3, and the second end of diode D3 can be the cathode of diode D3. The first end of diode D4 can be the anode of diode D4, and the second end of diode D4 can be the cathode of diode D4. Switch unit Q8 and switch unit Q9 can both be implemented using NMOS transistors with parasitic diodes. The control end of switch unit Q8 can be the gate of switch unit Q8, the first end of switch unit Q8 can be the source of switch unit Q8, and the second end of switch unit Q8 can be the drain of switch unit Q8; the control end of switch unit Q9 can be the gate of switch unit Q9, the first end of switch unit Q9 can be the source of switch unit Q9, and the second end of switch unit Q9 can be the drain of switch unit Q9. The first end of capacitor C2 can be either end of capacitor C2, and the second end of capacitor C2 can be the other end of capacitor C2; the first end of coil 301 can be either end of coil 301, and the second end of coil 301 can be the other end of coil 301.

[0161] The working principle of the above structure for converting a DC signal into an AC signal is described in detail below.

[0162] Taking the example of power module 801 outputting VBAT, when control module 802 turns on switch selection module 803, the voltage at point A reaches VBAT. Point A is connected to inductor L1, inductor L2, resistor R1, and resistor R2, respectively. The voltage at the first end of inductor L1 reaches VBAT, and the voltage at the first end of inductor L2 reaches VBAT. Power module 801 begins charging inductors L1 and L2, respectively. Simultaneously, a DC signal passes through point A and resistor R1 and is input to the control terminal of switch unit Q8. Furthermore, a DC signal passes through point A and resistor R2 and is input to the control terminal of switch unit Q9.

[0163] The voltage at point C (the junction of resistor R1, switch unit Q8, and diode D4) is less than VBAT and greater than the turn-on voltage of switch unit Q8 (e.g., 3V). The voltage at point D (the junction of resistor R2, switch unit Q9, and diode D3) is less than VBAT and greater than the turn-on voltage of switch unit Q8 (e.g., 3V). The electronic device can begin attempting to turn on switch units Q8 and Q9. Because the on-time of switch unit Q8 is shorter than that of switch unit Q9, switch unit Q8 turns on first.

[0164] After switch unit Q8 is turned on, point E (the junction of inductor L1, diode D3, and inductor L1) is grounded, and the voltage at the second terminal of diode D3 is zero, causing the voltage at the first terminal of diode D3 to drop to the voltage drop across diode D3 (e.g., 0.7V). At this point, the voltage at the control terminal of switch unit Q9 (the voltage at point D), e.g., 0.7V, is lower than the turn-on voltage of switch unit Q9. Switch unit Q9 cannot turn on, causing it to be turned off. At this point, switch unit Q8 is turned on, and switch unit Q9 is turned off.

[0165] After the switch unit Q8 is turned on and the switch unit Q9 is turned off, the DC signal reaches point F (the connection point of inductor L2, capacitor C2 and coil 301) through inductor L2. The voltage at point F is not zero, and point G (the connection point of inductor L1, capacitor C2 and coil 301) is connected to the ground terminal, and the voltage at point G is zero. At this time, the current flows from the second end of capacitor C2 to the first end of capacitor C2 (that is, from point F to point G); the current flows from the second end of coil 301 to the first end of coil 301. In this process, coil 301 and capacitor C2 can resonate in the positive half cycle (which can be understood as the positive half cycle of a sine wave), the voltage at point G gradually increases, and the voltage at point F gradually decreases. When the amplitude of the resonant signal passes through point 0, the amplitude of the resonant signal changes, the voltage at point G is greater than the voltage at point F, and the voltage at point F becomes 0.

[0166] At this point, after the voltage at point F reaches zero, the voltage at point H (the junction of switch unit Q9, diode D4, and inductor L2) also reaches zero. The voltage at point C drops to the voltage drop of diode D4 (e.g., 0.7V). This voltage is lower than the on-state voltage of switch unit Q8, so switch unit Q8 switches to the off state. Simultaneously, during the resonance process, the voltage at point G gradually increases, as does the voltage at point E. The voltage at point D can reach a value greater than the on-state voltage of switch unit Q9, causing switch unit Q9 to switch to the on state. At this point, switch unit Q8 of the electronic device is in the off state, while switch unit Q9 is in the on state.

[0167] After switch unit Q9 turns on and switch unit Q8 turns off, the DC signal reaches point G through inductor L1. The voltage at point G is non-zero, and point F is connected to ground, so the voltage at point F is zero. At this point, current flows from the first end of capacitor C2 to the second end of capacitor C2 (i.e., from point G to point F); current also flows from the first end of coil 301 to the second end of coil 301. During this process, coil 301 and capacitor C2 resonate during the negative half-cycle (which can be understood as the negative half-cycle of a sine wave).

[0168] In this way, the inverter module 804 converts a DC signal into a periodically changing AC signal by switching the switch units Q8 and Q9 on and off. The electronic device can use this circuit to control the coil 301 to generate an electromagnetic signal, causing the aluminum metal in the battery to induce the electromagnetic signal, generating an eddy current heating effect, thereby heating the battery. Furthermore, this battery heating circuit reduces the need for the control module 802 to externally control the power module 801 and / or the inverter module 804.

[0169] For example, the present application embodiment also provides a structural diagram of another inverter module, such as Figure 10 As shown in Figure b:

[0170] exist Figure 10 Based on the inverter module 804 shown in Figure a, the inverter module 804 may further include a diode D5, a diode D6, a resistor R3 and a resistor R4.

[0171] The first end of diode D5 is connected to the first end of resistor R3, the first end of switch unit Q8, and the first end of switch unit Q9; the second end of diode D5 is connected to the second end of resistor R3, the output end of resistor R1, and the control end of switch unit Q8. The first end of diode D6 is connected to the first end of resistor R4, the first end of switch unit Q8, and the first end of switch unit Q9; the second end of diode D6 is connected to the second end of resistor R4, the output end of resistor R2, and the control end of switch unit Q9.

[0172] Specifically, diode D5 and diode D6 can both be voltage regulator diodes. Resistor R3 and diode D5 can be used to stabilize the voltage at the control end of switch unit Q8 to prevent the voltage from being too high and damaging switch unit Q8; resistor R4 and diode D6 can be used to stabilize the voltage at the control end of switch unit Q9 to prevent the voltage from being too high and damaging switch unit Q9.

[0173] It should be noted that the embodiments of this application are only combined with Figure 9 and Figure 10 Two battery heating circuit structures are provided, along with the circuit structure of the inverter module 804. The present embodiment of the present application can also implement the function of providing an AC signal to the coil 301 based on other inverter circuits, such as a full-bridge inverter circuit, a half-bridge inverter circuit, and variations thereof. This embodiment of the present application is not limited thereto.

[0174] In this embodiment of the present application, the AC signal output by the inverter module 804 is related to the amount of heat lost by the battery. Within a certain frequency range, the frequency of the AC signal is positively correlated with the amount of heat lost by the battery. The electronic device can adjust the frequency of the AC signal output by the inverter module 804 to increase the amount of heat lost by the battery, thereby increasing the battery's heating rate.

[0175] This is because the eddy current loss P of the battery in the alternating magnetic field e The following formula can be satisfied:

[0176] P e =K e ×B 2 max ×t 2 ×f 2 ×V

[0177] Among them, K e is the eddy current coefficient of the metal, B max is the maximum magnetic flux density, t is the thickness of the metal, f is the frequency of the AC signal, and V is the volume of the metal. Based on the above formula, it can be seen that the frequency of the AC signal is positively correlated with the battery's heating rate. In this embodiment of the present application, the battery's heating rate can be increased by adjusting the frequency of the AC signal output by the inverter module 804.

[0178] The above embodiments describe in detail the battery heating device and battery heating circuit provided by the embodiments of the present application. Figure 11 The battery heating method in the embodiment of the present application is described. Figure 11 As shown:

[0179] Specifically, Figure 11 FIG. 1 shows a flow chart of a battery heating method provided in an embodiment of the present application; FIG. Figure 11 As shown:

[0180] S1101. The electronic device detects a battery status and a battery temperature. The battery status includes a charging state and an uncharging state.

[0181] Electronic devices can monitor battery status in real time. For example, electronic devices can obtain battery status through battery broadcasts, which can carry an indicator of the battery status. Battery status indicators can include a charging indicator and a non-charging indicator. The charging indicator can be, for example, BATTERY_STATUS_CHARGING, and the non-charging indicator can be, for example, BATTERY_STATUS_NOT_CHARGING.

[0182] The control module 802 of the electronic device can select the output type of the power module 801 based on the battery's charge and discharge status. For example, when the received battery status indicator indicates charging, the control module 802 controls the power module 801 to output VBUS; when the received battery status indicator indicates uncharging, the control module 802 controls the power module 801 to output VBAT.

[0183] The electronic device can also monitor the battery temperature in real time. For example, in an electronic device, a thermistor is provided around the battery, and the electronic device can obtain the battery temperature based on the corresponding relationship between the thermistor's resistance value and temperature. The embodiments of the present application may also use other methods to detect the battery temperature, and the embodiments of the present application are not limited thereto.

[0184] In an embodiment of the present application, 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 may be a first preset temperature, such as -20°C. The first preset temperature may be set based on the relationship between the amount of power consumed by heating the battery and the amount of power lost at the current temperature. Heating the battery can save power and extend battery life only when the amount of power consumed by heating the battery is less than the amount of power lost in a low-temperature environment.

[0185] It is understandable that in step S1101, the electronic device detecting the battery status is an optional step. Figure 9 In the case of the structure shown in FIG, the control module 802 can control the switching state of the switch unit Q1 and the switch unit Q2 according to the battery state to output VBAT or VBUS. Figure 10 In the case of the structure shown, the power module can adaptively output VBAT or VBUS, and does not need the control module 802 to control it. The electronic device does not need to perform the step of detecting the battery status in step S1101.

[0186] S1102: When the battery temperature is less than or equal to a first preset temperature, 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.

[0187] 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 turned on to ensure that the battery can maintain the normal operation of the electronic device.

[0188] When the battery temperature is low, the electronic device can prompt the user to enable the battery heating function. This prompt can be displayed as a pop-up window or a notification. The prompt may include, for example, "The battery temperature is too low. To ensure normal operation of the device, please enable the battery heating function."

[0189] Optionally, the prompt information may also include a control for turning on the battery heating function (also known as a confirmation control, an affirmation control, an on control, etc.) and a control for canceling the battery heating function (also known as a cancel control, etc.). The user can choose whether to turn on the battery heating function according to their needs.

[0190] Optionally, before displaying the prompt information, it also includes: the electronic device detecting the running application; displaying the prompt information may include: when the application load is greater than the load threshold, the electronic device may display the prompt information.

[0191] Understandably, when an electronic device's screen is on and applications are running, the battery consumes a large amount of power. Therefore, electronic devices need to heat the battery to offset the power consumption caused by low temperatures, thereby improving the endurance of electronic devices in low-temperature environments. For example, if a user uses an electronic device to take a photo in a low-temperature environment and detects that a camera application is running, the electronic device may display the above prompt message to increase the battery temperature and extend the photo taking time.

[0192] Optionally, the electronic device may not perform step S1102. For example, if the battery temperature is less than or equal to a first preset temperature, the electronic device may automatically activate the battery heating function, eliminating the need for the user to select whether to activate the battery heating function. That is, after step S1101, the electronic device may perform the step of controlling the switch selection module 803 to be turned on.

[0193] S1103 : When an operation for turning on the battery heating function is received, the electronic device controls the switch selection module 803 to turn on in response to the operation.

[0194] The operation for turning on the battery heating function may be, for example, a selection operation for a control for turning on the battery heating function. After determining that the conditions for turning on the battery heating function are met, the electronic device may perform a battery heating process.

[0195] In some embodiments, the control module 802 may be a system on chip (SOC), a module or chip with specific logic judgment capabilities, etc., and the on and off of the switch unit Q3 may be controlled by the control module 802. For example, the control module 802 may include a GPIO interface. The GPIO interface may output high and low levels, with a high level controlling the on-state of the switch unit Q3 and a low level controlling the off-state of the switch unit Q3; alternatively, a low level controlling the on-state of the switch unit Q3 and a high level controlling the off-state of the switch unit Q3. This embodiment of the present application is not limited in this regard.

[0196] S1104 : The electronic device heats the battery based on the alternating magnetic field of the coil 301 .

[0197] The electronic device heats the battery based on the alternating magnetic field of the coil 301, specifically including:

[0198] When the battery 104 is in a charging state and the switch selection module 803 is in an on state, the power module 801 inputs a first DC signal to the inverter module 804 via the switch selection module 803. The inverter module 803 converts the first DC signal into a first AC signal and transmits the first AC signal to the coil 301. The coil 301 receives the first AC signal and generates a first electromagnetic signal. The battery 104 senses the first electromagnetic signal and generates eddy current loss, which heats the battery 104. The first DC signal can be the DC signal when the power module 801 outputs VBUS.

[0199] Alternatively, when the battery 104 is uncharged and the switch selection module 803 is in the on state, the power module 801 inputs a second DC signal to the inverter module 804 via the switch selection module 803; the inverter module 803 converts the second DC signal into a second AC signal and transmits the second AC signal to the coil 301; the coil 301 receives the second AC signal and generates a second electromagnetic signal; the battery 104 senses the second electromagnetic signal and generates eddy current loss to heat the battery 104. The first DC signal is different from the second DC signal, and the second DC signal can be the DC signal when the power module 801 outputs VBAT.

[0200] S1105 : When the battery temperature is greater than a second preset temperature or the heating time is greater than a preset time, the electronic device controls the switch selection module to turn off to stop heating the battery.

[0201] The second preset temperature may be a temperature threshold for determining whether to turn off the battery heating function, and the second preset temperature may be greater than or equal to the first preset temperature. The preset duration may be a heating time threshold for determining whether to turn off the battery heating function.

[0202] Understandably, once the battery temperature reaches a certain level, the electronic device will disable the battery heating function to mitigate potential issues caused by excessive temperatures, 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 power consumed by heating the battery and the amount of power lost at the current temperature.

[0203] In addition, to improve the safety of the battery heating process, the electronic device can set a preset heating time. After the heating time reaches the preset time, the electronic device can turn off the battery heating function to reduce the problem scenario of excessive battery temperature due to software abnormalities or temperature detection abnormalities.

[0204] Optionally, in the embodiment of the present application, the determination condition for turning off the battery heating function may not include a preset duration. For example, step S1105 may also include: if the battery temperature is greater than a second preset temperature, the electronic device controls the switch selection module to turn off. This embodiment of the present application is not limited to this.

[0205] In this way, in a low-temperature environment, the electronic device can heat the battery, reduce the impact of the low-temperature environment on the battery, extend the battery life, and improve the user experience.

[0206] 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, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0207] In order to better understand the embodiments of the present application, the structure of the electronic device according to the embodiments of the present application is introduced below:

[0208] Figure 121 shows a schematic structural diagram of an electronic device 100. The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display 194, a subscriber identification module (SIM) card interface 195, and an embedded secure element (eSE) 196. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0209] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0210] The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). The different processing units may be independent devices or integrated into one or more processors.

[0211] Processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. This memory can store instructions or data that have just been used or are being recycled by processor 110. If processor 110 needs to use the instruction or data again, it can retrieve it from the memory. This avoids duplicate accesses, reduces processor 110 latency, and thus improves system efficiency.

[0212] In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuits sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface.

[0213] The I2C interface is a bidirectional synchronous serial bus that includes a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor 110 may include multiple I2C bus lines. The processor 110 may be coupled to the touch sensor 180K, the charger, the flash, the camera 193, and the like via different I2C bus interfaces. For example, the processor 110 may be coupled to the touch sensor 180K via the I2C interface, enabling communication between the processor 110 and the touch sensor 180K via the I2C bus interface, thereby implementing the touch function of the electronic device 100.

[0214] The GPIO interface can be configured via software. The GPIO interface can be configured as either a control signal or a data signal. In some embodiments, the GPIO interface can be used to connect the processor 110 to the camera 193, display 194, wireless communication module 160, audio module 170, sensor module 180, etc. The GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.

[0215] The USB interface 130 is an interface that complies with USB standards and may be a Mini USB interface, a Micro USB interface, a USB Type-C interface, or the like. The USB interface 130 can be used to connect a charger to charge the electronic device 100, or to transfer data between the electronic device 100 and peripheral devices. It can also be used to connect headphones to play audio. This interface can also be used to connect other electronic devices, such as augmented reality devices.

[0216] It is understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is for illustrative purposes only and does not constitute a structural limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection methods from those in the above embodiments, or a combination of multiple interface connection methods.

[0217] The charging management module 140 is configured to receive charging input from a charger. The charger can be either a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 can receive charging input from the wired charger via the USB interface 130. In some wireless charging embodiments, the charging management module 140 can receive wireless charging input via the wireless charging coil of the electronic device 100. While charging the battery 142, the charging management module 140 can also provide power to the electronic device via the power management module 141.

[0218] The power management module 141 is used to connect the battery 142, the charging management module 140, and the processor 110. The power management module 141 receives input from the battery 142 and / or the charging management module 140, and provides power to the processor 110, the internal memory 121, the display 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle count, and battery health status (leakage, impedance). In some other embodiments, the power management module 141 can also be set in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 can also be set in the same device.

[0219] The internal memory 121 can be used to store computer executable program codes, and the executable program codes include instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the electronic device 100 (such as audio data, a phone book, etc.), etc. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 110 executes various functional applications and data processing of the electronic device 100 by running instructions stored in the internal memory 121 and / or instructions stored in a memory provided in the processor.

[0220] The temperature sensor 180J is used to detect temperature. In some embodiments, the electronic device 100 uses the temperature detected by the temperature sensor 180J to execute a temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold, the electronic device 100 reduces the performance of the processor located near the temperature sensor 180J to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 heats the battery 142 to prevent the electronic device 100 from shutting down abnormally due to low temperature. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 boosts the output voltage of the battery 142 to prevent abnormal shutdown due to low temperature.

[0221] The battery heating method provided in the embodiment of the present application can be applied to electronic devices with communication functions. The specific device form of the electronic device can refer to the above related description and will not be repeated here.

[0222] An embodiment of the present 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, so that the electronic device performs the above method.

[0223] The present embodiment provides a chip system comprising at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a circuit, and the at least one processor is configured to execute a computer program or instruction to perform the above-described method. The implementation principles and technical effects thereof are similar to those of the above-described related embodiments and are not further described here.

[0224] The embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the above-mentioned method is implemented. The methods described in the above embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. Computer-readable media 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 that can be accessed by a computer.

[0225] In one possible implementation, a computer-readable medium may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other medium intended to carry or store the desired program code in the form of instructions or data structures and accessible by a computer. Moreover, any connection is appropriately referred to as a computer-readable medium. For example, if a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology (such as infrared, radio and microwave) is used to transmit software from a website, server or other remote source, the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of medium. Disk and optical disc as used herein include optical disc, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks generally reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0226] An embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is executed, the computer executes the above method.

[0227] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable device to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1apparatuses that implement the functions specified in one or more blocks or multiple blocks. Figure 1

[0228] The above detailed description has disclosed, by way of example, illustrative implementations of the application. It should be understood that changes can be made to the embodiments described and equivalents can be substituted without departing from the true spirit and scope of the application. In the claims, means-plus-function clauses are used where functionally equivalent structures are recited. Although a claim can be dependent on several limitations, the systems and methods of the present application can still fulfill all of these limitations at once. Recitation of claims employing the transitional phrase "a method comprising" (or any of its equivalents), unless otherwise indicated, are intended to invoke the transitional phrase "means for" (or any of its equivalents) as an alternative.​

Claims

1. A battery heating device, characterized in that: include: A magnetic conductive unit, located on one side of the battery; a first coil, the first coil being located on a side of the magnetic conductive unit facing the battery; An inverter module is configured to provide an alternating current signal to the first coil when receiving electric energy input, so that the first coil generates an alternating magnetic field to heat the battery.

2. The battery heating device according to claim 1, characterized in that: The battery heating device further includes the battery; the battery includes a metal outer layer; the metal outer layer is used to induce the electromagnetic signal from the first coil and generate eddy current loss to heat the battery.

3. The battery heating device according to claim 1 or 2, characterized in that: The battery heating device further includes: A power supply module is connected to the inverter module and is used to input a direct current signal to the inverter module.

4. The battery heating device according to claim 3, characterized in that: The power module includes: the battery; The battery is configured to input a first DC signal to the inverter module when the battery temperature is less than or equal to a first preset temperature and the battery is in an uncharged state; The inverter module is specifically configured to convert the first DC signal into a first AC signal, and input the first AC signal to the first coil; The first coil is specifically configured to receive the first alternating current signal and generate a first electromagnetic signal.

5. The battery heating device according to claim 3, characterized in that: The power supply module includes: an external power supply; The external power supply is configured to input a second DC power signal to the inverter module when the battery temperature is less than or equal to a first preset temperature and the battery is in a charging state; The inverter module is specifically configured to convert the second DC signal into a second AC signal, and input the second AC signal to the first coil; The first coil is specifically configured to receive the second alternating current signal and generate a second electromagnetic signal.

6. The battery heating device according to any one of claims 3 to 5, characterized in that: The battery heating device further includes: a first switch unit, located between the power module and the inverter module; A control module, wherein the control module is used to control the first switch unit to be turned on when the battery temperature is less than or equal to a first preset temperature; and to control the first switch unit to be turned off when the battery temperature is greater than a second preset temperature; the first preset temperature is lower than the second preset temperature.

7. The battery heating device according to any one of claims 3 to 6, characterized in that: The power module specifically includes: a second switch unit, the second switch unit being connected to an interface of an external power supply and the first switch unit respectively; a third switch unit, the third switch unit being connected to the battery and the first switch unit respectively; Wherein, when the battery is in a charging state, the second switch unit is in an on state, and the third switch unit is in an off state; when the battery is in an uncharged state, the second switch unit is in an off state, and the third switch unit is in an on state.

8. The battery heating device according to any one of claims 3 to 6, characterized in that: The power module specifically includes: a first diode, wherein the first diode is connected to the interface of the external power supply and the first switch unit respectively; A second diode is connected to the battery and the first switch unit respectively.

9. The battery heating device according to any one of claims 1 to 8, characterized in that: The battery heating device further includes: A graphite layer is located on a side of the first coil facing the battery.

10. The battery heating device according to any one of claims 1 to 9, characterized in that: The metal outer layer of the battery comprises an aluminum-plastic film.

11. An electronic device, characterized in that: include: A magnetic conductive unit, located on one side of the battery; a first coil, the first coil being located on a side of the magnetic conductive unit facing the battery; An inverter module is configured to provide an alternating current signal to the first coil when receiving electric energy input, so that the first coil generates an alternating magnetic field to heat the battery.

12. The electronic device according to claim 11, wherein: The electronic device further includes the battery; the battery includes a metal outer layer; the metal outer layer is used to induce the electromagnetic signal from the first coil and generate eddy current loss to heat the battery.

13. The electronic device according to claim 11 or 12, characterized in that: The electronic device further comprises: A power supply module is connected to the inverter module and is used to input a direct current signal to the inverter module.

14. The electronic device according to claim 13, wherein: The power module includes: the battery; The battery is configured to input a first DC signal to the inverter module when the battery temperature is less than or equal to a first preset temperature and the battery is in an uncharged state; The inverter module is specifically configured to convert the first DC signal into a first AC signal, and input the first AC signal to the first coil; The first coil is specifically configured to receive the first alternating current signal and generate a first electromagnetic signal.

15. The electronic device according to claim 13, wherein: The power supply module includes: an external power supply; The external power supply is configured to input a second DC power signal to the inverter module when the battery temperature is less than or equal to a first preset temperature and the battery is in a charging state; The inverter module is specifically configured to convert the second DC signal into a second AC signal, and input the second AC signal to the first coil; The first coil is specifically configured to receive the second alternating current signal and generate a second electromagnetic signal.

16. The electronic device according to any one of claims 13 to 15, characterized in that: The electronic device further comprises: a first switch unit, located between the power module and the inverter module; A control module, wherein the control module is used to control the first switch unit to be turned on when the battery temperature is less than or equal to a first preset temperature; and to control the first switch unit to be turned off when the battery temperature is greater than a second preset temperature; the first preset temperature is lower than the second preset temperature.

17. The electronic device according to any one of claims 13 to 16, characterized in that: The power module specifically includes: a second switch unit, the second switch unit being connected to an interface of an external power supply and the first switch unit respectively; a third switch unit, the third switch unit being connected to the battery and the first switch unit respectively; Wherein, when the battery is in a charging state, the second switch unit is in an on state, and the third switch unit is in an off state; when the battery is in an uncharged state, the second switch unit is in an off state, and the third switch unit is in an on state.

18. The electronic device according to any one of claims 13 to 16, characterized in that: The power module specifically includes: a first diode, wherein the first diode is connected to the interface of the external power supply and the first switch unit respectively; A second diode is connected to the battery and the first switch unit respectively.

19. The electronic device according to any one of claims 11 to 18, characterized in that: The electronic device further comprises: A graphite layer is located on a side of the first coil facing the battery.

20. The electronic device according to any one of claims 11 to 19, characterized in that: The metal outer layer of the battery comprises an aluminum-plastic film.

21. The electronic device according to any one of claims 11 to 20, characterized in that: The electronic device further comprises: a back shell, the back shell being located on a side of the magnetic conductive unit facing away from the first coil; a middle frame, the middle frame being located on a side of the battery facing away from the first coil; The screen is located on a side of the middle frame facing away from the battery.

22. The electronic device according to any one of claims 11 to 20, characterized in that: The electronic device further comprises: a back shell, the back shell being located on a side of the battery facing away from the first coil; a middle frame, the middle frame being located on a side of the magnetic conductive unit facing away from the first coil; The screen is located on a side of the middle frame away from the magnetic conductive unit.

23. A battery heating method, characterized in that: Applied to the electronic device according to any one of claims 11 to 22, the method comprising: When it is detected that the battery temperature is less than or equal to a first preset temperature, controlling the first coil to generate an alternating magnetic field to heat the battery; When it is detected that the battery temperature is greater than a second preset temperature, the first coil is controlled to stop generating the alternating magnetic field; the second preset temperature is greater than the first preset temperature.

24. The method according to claim 23, wherein Before controlling the first coil to generate an alternating magnetic field to heat the battery, the method includes: When the battery is in an uncharged state, controlling the power supply module to input a first DC signal to the inverter module; When it is detected that the battery temperature is less than or equal to a first preset temperature, controlling the first switch unit to be turned on; The controlling the first coil to generate an alternating magnetic field to heat the battery includes: The inverter module converts the first direct current signal into a first alternating current signal; and the first coil generates a first electromagnetic signal based on the first alternating current signal.

25. The method according to claim 23, characterized in that Before controlling the first coil to generate an alternating magnetic field to heat the battery, the method includes: When the battery is in a charging state, controlling the power supply module to input a second DC signal to the inverter module; When it is detected that the battery temperature is less than or equal to a first preset temperature, controlling the first switch unit to be turned on; The controlling the first coil to generate an alternating magnetic field to heat the battery includes: The inverter module converts the second DC power signal into a second AC power signal; The first coil generates a second electromagnetic signal based on the second alternating current signal.

26. The method according to any one of claims 24 or 25, characterized in that Before controlling the first switch unit to be turned on, the method further includes: displaying a prompt message, the prompt message being used to prompt a user whether to heat the battery when the battery temperature is less than or equal to the first preset temperature; the prompt message including a first control; The controlling the first switch unit to be turned on includes: In response to a trigger operation on the first control, the first switch unit is controlled to be turned on.

27. The method according to any one of claims 23 to 26, characterized in that The controlling the first coil to stop generating the alternating magnetic field includes: The first switch unit is controlled to be turned off.

28. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 23 to 27 is implemented.

29. A chip system, characterized in that: The system comprises at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a line, and the at least one processor is used to run a computer program or instruction to execute the method according to any one of claims 23 to 27.

30. A computer program product, characterized in that The method comprises a computer program which, when being executed, causes a computer to execute the method according to any one of claims 23 to 27.

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