Battery low-temperature protection method and apparatus, and electronic device

Abstract

The present application relates to the technical field of batteries, and in particular to a battery low-temperature protection method and apparatus, and an electronic device. The battery low-temperature protection method comprises: in response to a charger being connected to an electronic device, determining the type of the charger; and determining a charging mode and an operating mode of a heating film on the basis of the type of the charger and the temperature of a battery, wherein the type of the charger comprises a fast charging charger and a non-fast charging charger, the charging mode comprises a fast charging mode and a non-fast charging mode, the heating film is used for heating the battery, and the operating mode comprises a heating mode and a stop-heating mode. According to the battery low-temperature protection method and apparatus, and the electronic device provided in the present application, the battery can be heated in a low-temperature environment so as to reduce the impact of a low temperature on the charging and discharging performance of the battery, thereby improving user experience.

Description

Low-temperature protection method and device of battery and electronic equipment

[0001] The present application claims priority to the Chinese Patent Application No. 202410868237.5, filed on June 28, 2024, and entitled "Low-temperature protection method and device of battery and electronic equipment", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, and in particular to a low-temperature protection method and device of battery and electronic equipment. BACKGROUND

[0003] At present, a battery is usually arranged in an electronic equipment to provide power for normal operation of the electronic equipment by discharging the battery, and to supplement the battery with power by charging the battery. The battery in the electronic equipment is usually a lithium battery, and the working temperature of the lithium battery can affect the charging and discharging performance of the lithium battery. When the electronic equipment is in a low-temperature (e.g., less than 0℃) environment, the viscosity of the electrolyte of the lithium battery increases, and the ion migration speed of the electrolyte slows down, thereby reducing the capacity and discharging capacity of the battery. At the same time, the lithium battery is prone to lithium precipitation at low temperature, which prevents the lithium battery from achieving fast charging in a low-temperature environment, thereby affecting the power supply of the lithium battery. In other words, in a low-temperature environment, the charging and discharging performance of the lithium battery is affected, thereby affecting the user experience of the electronic equipment and the lithium battery in a low-temperature environment. SUMMARY

[0004] To solve the above problems, the present application provides a low-temperature protection method and device of battery and electronic equipment, which can heat the battery in a low-temperature environment to reduce the influence of low temperature on the charging and discharging performance of the battery, and improve the user experience.

[0005] To achieve the above purpose, in a first aspect, the present application provides a low-temperature protection method of battery, comprising: determining the type of charger in response to the charger being connected to the electronic equipment; determining the charging mode and the working mode of the heating film based on the type of charger and the temperature of the battery; wherein the type of charger includes a fast charging charger and a non-fast charging charger, the charging mode includes a fast charging mode and a non-fast charging mode, the heating film is used to heat the battery, and the working mode includes a heating mode and a stop heating mode.

[0006] In the embodiment, after the charger is connected to the electronic device, the electronic device can first determine the type of the charger. After determining the type of the charger, the battery can be charged in a suitable manner at different temperatures and different charger types, so as to improve the charging efficiency and meet the charging needs of the user. The method provided in the embodiment can also enable the heating film to select a suitable working mode at different temperatures and different charger types, so as to achieve low-temperature protection of the battery while saving energy resources.

[0007] In an optional implementation, the determining of the charging mode and the working mode of the heating film based on the type of the charger and the temperature of the battery includes: detecting the temperature of the battery in response to the type of the charger being a fast charging charger; determining the working mode of the heating film as a heating mode to heat the battery in response to the temperature of the battery being less than a first temperature threshold; charging the battery in a non-fast charging mode in response to the temperature of the battery being heated to be greater than or equal to the first temperature threshold and less than a second temperature threshold; switching the non-fast charging mode to a fast charging mode to charge the battery in response to the temperature of the battery being heated to be greater than or equal to the second temperature threshold and less than a third temperature threshold; and adjusting the working mode of the heating film to a stop heating mode to stop heating the battery in response to the temperature of the battery being heated to be greater than or equal to the third temperature threshold, wherein the third temperature threshold is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold. In this way, when the charger is a fast charging charger, the working mode of the heating film and the charging mode can be adjusted according to the temperature of the battery, so as to achieve fast charging of the battery in a low-temperature environment.

[0008] In an optional implementation, the determining of the working mode of the heating film as the heating mode to heat the battery in response to the temperature of the battery being less than the first temperature threshold includes: adjusting the output power of the charger to a target output power in response to the temperature of the battery being less than the first temperature threshold; and electrically connecting the heating film to the charger, so that the charger supplies power to the heating film at the target output power to heat the battery. In this way, the phenomenon that the output power of the charger is too large, the load of the heating film system is too large, and the heating film is burned out can be avoided, so as to protect the heating film.

[0009] In an optional implementation, after the heating film is electrically connected to the charger, so that the charger supplies power to the heating film at the target output power to heat the battery, the method further includes: detecting an actual heating power of the heating film on the battery; continuing to heat in response to the actual heating power meeting a set power range requirement; and adjusting the output voltage of the charger to adjust the actual output power of the charger in response to the actual heating power not meeting the set power range requirement. In this way, the heating power of the heating film can be adjusted in time to improve the heating efficiency of the heating film on the battery, so as to achieve safe charging as soon as possible.

[0010] In an optional implementation, the method for determining the target output power comprises: detecting the maximum output power of the charger; comparing the maximum output power of the charger with the preset output power; in response to the maximum output power of the charger being greater than or equal to the preset output power, taking the preset output power as the target output power; and in response to the maximum output power of the charger being less than the preset output power, taking the maximum output power of the charger as the target output power. In this way, the target output power can be determined based on the capability of the charger, so as to avoid unreasonable setting of the target output power.

[0011] In an optional implementation, in response to the temperature of the battery being heated to be greater than or equal to the third temperature threshold, the working mode of the heating film is adjusted to the stop heating mode to stop heating the battery, and the method further comprises: in response to the temperature of the battery falling to be less than the fourth temperature threshold, determining the working mode of the heating film to be the heating mode to heat the battery; and wherein the fourth temperature threshold is less than the third temperature threshold, and the fourth temperature threshold is greater than the second temperature threshold. In this way, the temperature of the battery can be continuously monitored after the heating film stops heating, and if the temperature of the battery falls to the fourth temperature threshold, the battery can be heated again to maintain the temperature of the battery within the safe temperature range of the fast charging mode.

[0012] In an optional implementation, the method for determining the charging mode and the working mode of the heating film based on the type of the charger and the temperature of the battery further comprises: in response to the temperature of the battery being greater than or equal to the second temperature threshold and less than the third temperature threshold, charging the battery in the non-fast charging mode and making the heating film in the stop heating mode. In this way, it is indicated that the temperature of the battery can be normally charged without heating, so as to save energy.

[0013] In an optional implementation, the method for determining the charging mode and the working mode of the heating film based on the type of the charger and the temperature of the battery further comprises: in response to the temperature of the battery being greater than or equal to the third temperature threshold, charging the battery in the fast charging mode and making the heating film in the stop heating mode. In this way, it is indicated that the temperature of the battery can be normally charged without heating, so as to save energy.

[0014] In an optional embodiment, the determining the charging mode and the working mode of the heating film based on the type of the charger and the temperature of the battery comprises: detecting the temperature of the battery in response to the type of the charger being a non-fast charging charger; determining the working mode of the heating film as a heating mode to heat the battery in response to the temperature of the battery being less than a first temperature threshold; charging the battery in a non-fast charging mode in response to the temperature of the battery being heated to be greater than or equal to the first temperature threshold and less than a fifth temperature threshold; and adjusting the working mode of the heating film to a stop heating mode to stop heating the battery in response to the temperature of the battery being heated to be greater than or equal to the fifth temperature threshold, wherein the fifth temperature threshold is greater than the first temperature threshold. In this way, when the charger is a non-fast charging charger, the working mode of the heating film and the charging time can be adjusted according to the temperature of the battery, thereby meeting the charging requirements of the battery in a low temperature environment.

[0015] In an optional embodiment, the determining the working mode of the heating film as a heating mode to heat the battery in response to the temperature of the battery being less than a first temperature threshold comprises: electrically connecting the heating film to the charger to enable the charger to supply power to the heating film in response to the temperature of the battery being less than the first temperature threshold; and controlling the heating film to heat the battery at a first heating power by pulse width modulation (PWM), wherein the first heating power is less than the maximum output power of the non-fast charging charger. In this way, the heating power of the heating film can be controlled by PWM.

[0016] In an optional embodiment, the determining the charging mode and the working mode of the heating film based on the type of the charger and the temperature of the battery further comprises: charging the battery in a non-fast charging mode and causing the heating film to be in a stop heating mode in response to the temperature of the battery being greater than or equal to the first temperature threshold. In this way, the temperature of the battery is normal for charging, and heating is not required, thereby saving energy.

[0017] In an optional embodiment, the method further comprises: detecting the temperature of the battery in response to the display screen being on and the first application being started when the charger is not connected to the electronic device; determining the working mode of the heating film as a heating mode to heat the battery in response to the temperature of the battery being less than a sixth temperature threshold; and adjusting the working mode of the heating film to a stop heating mode to stop heating the battery in response to the temperature of the battery being heated to be greater than or equal to the first temperature threshold, wherein the sixth temperature threshold is less than the first temperature threshold, and the sixth temperature threshold is less than 0℃. In this way, the battery can be normally discharged in a low temperature environment, thereby avoiding affecting the power of the battery and improving the user experience.

[0018] In an optional embodiment, in response to the temperature of the battery being less than the sixth temperature threshold, the working mode of the heating film is determined as the heating mode to heat the battery, comprising: in response to the temperature of the battery being less than the sixth temperature threshold, electrically connecting the heating film to the battery to enable the battery to supply power to the heating film; controlling the current output from the battery to the heating film to be the target current value; and controlling the heating film to heat the battery at the second heating power by using pulse width modulation (PWM), wherein the second heating power is less than or equal to the maximum heating power of the heating film. In this way, the control of the heating power of the heating film can be realized by using PWM.

[0019] In a second aspect, the application provides a low-temperature protection device for a battery, comprising: a charging module, the charging module comprising a charger interface, the charger interface being configured to connect a charger; a heating module, the heating module comprising a heating film, the heating film being configured to heat the battery, the working mode of the heating film comprising a heating mode and a stop heating mode; a temperature detection module, the temperature detection module being arranged in the battery and being configured to detect the temperature of the battery; and a control module, the control module being configured to determine the type of the charger in response to the charger being connected to the charger interface, and to determine the charging mode and the working mode of the heating film based on the type of the charger and the temperature of the battery; wherein the type of the charger comprises a fast charging charger and a non-fast charging charger, and the charging mode comprises charging the battery by using a fast charging unit or a non-fast charging unit.

[0020] In this embodiment, after the charger is connected to the electronic device, the electronic device can first determine the type of the charger. After determining the type of the charger, the battery can adopt a suitable charging mode at different temperatures and different charger types, so as to improve the charging efficiency and meet the charging needs of the user. The device provided in this embodiment can also enable the heating film to select a suitable working mode at different temperatures and different charger types, so as to realize low-temperature protection of the battery while saving energy resources.

[0021] In an optional embodiment, the charging module further comprises a fast charging unit and a non-fast charging unit; one end of the fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; one end of the non-fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; the heating module further comprises a first switching unit, which is coupled between the charger interface and the heating film; the control module is configured to control the temperature detection module to detect the temperature of the battery in response to the type of the charger being a fast charger; the control module is further configured to control the first switching unit to be in a conducting state, so that the charger supplies power to the heating film and the heating film heats the battery in response to the temperature of the battery being less than a first temperature threshold; the control module is further configured to control the non-fast charging unit to charge the battery in response to the temperature of the battery being heated to be greater than or equal to the first temperature threshold and less than a second temperature threshold; the control module is further configured to close the non-fast charging unit and control the fast charging unit to charge the battery in response to the temperature of the battery being heated to be greater than or equal to the second temperature threshold and less than a third temperature threshold; the control module is further configured to control the first switching unit to be in a non-conducting state and adjust the working mode of the heating film to a stop heating mode to stop heating the battery in response to the temperature of the battery being heated to be greater than or equal to the third temperature threshold; wherein the third temperature threshold is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold. In this way, when the charger is a fast charger, the working mode of the heating film and the charging mode can be adjusted according to the temperature of the battery, so as to realize fast charging of the battery in a low temperature environment.

[0022] In an optional embodiment, the control module is further configured to control the output power of the charger to be a target output power, so that the charger supplies power to the heating film at the target output power to heat the battery. In this way, the output power of the charger can be prevented from being too large, so as to prevent the heating film system from being overloaded and the heating film from being burned out, thereby realizing protection of the heating film.

[0023] In an optional embodiment, further comprising: a voltage sampling unit and a current sampling unit; the voltage sampling unit is configured to detect the actual input voltage of the heating film; the current sampling unit is configured to detect the actual input current of the heating film; the control module is configured to obtain the actual input voltage detected by the voltage sampling unit and the actual input current detected by the current sampling unit, and calculate the actual heating power of the heating film on the battery according to the actual input voltage and the actual input current; the control module is further configured to continue heating in response to the actual heating power meeting the set power range requirement; the control module is further configured to adjust the output voltage of the charger to adjust the actual output power of the charger in response to the actual heating power not meeting the set power range requirement. In this way, the heating power of the heating film can be adjusted in time to improve the heating efficiency of the heating film on the battery, so as to realize safe charging as soon as possible.

[0024] In an alternative embodiment, the control module is further configured to detect a maximum output power of the charger, compare the maximum output power of the charger with the preset output power, in response to the maximum output power of the charger being greater than or equal to the preset output power, set the preset output power as the target output power, and in response to the maximum output power of the charger being less than the preset output power, set the maximum output power of the charger as the target output power. In this way, the target output power can be determined based on the capability of the charger, so as to avoid unreasonable setting of the target output power.

[0025] In an alternative embodiment, the control module is further configured to, in response to the temperature of the battery being greater than or equal to the second temperature threshold and less than the third temperature threshold, control the non-fast charging unit to charge the battery, and control the first switching unit to be in an off state, so as to make the heating film in a stop heating mode. In this way, it is indicated that the temperature of the battery is normal for charging, and heating is not needed, so as to save energy.

[0026] In an alternative embodiment, the control module is further configured to, in response to the temperature of the battery being greater than or equal to the third temperature threshold, control the fast charging unit to charge the battery, and control the first switching unit to be in an off state, so as to make the heating film in a stop heating mode. In this way, it is indicated that the temperature of the battery is normal for charging, and heating is not needed, so as to save energy.

[0027] In an alternative embodiment, the charging module further comprises a non-fast charging unit, one end of the non-fast charging unit being coupled to the charger interface and the other end being coupled to the battery; the heating module further comprises a first switching unit, the first switching unit being coupled between the charger interface and the heating film; the control module is configured to, in response to the type of the charger being a non-fast charger, control the temperature detection module to detect the temperature of the battery; the control module is further configured to, in response to the temperature of the battery being less than a first temperature threshold, control the first switching unit to be in a conductive state, so as to make the charger supply power to the heating film and control the heating film to heat the battery; the control module is further configured to, in response to the temperature of the battery being heated to be greater than or equal to the first temperature threshold and less than a fifth temperature threshold, control the non-fast charging unit to charge the battery; the control module is further configured to, in response to the temperature of the battery being heated to be greater than or equal to the fifth temperature threshold, control the first switching unit to be in an off state, and adjust the working mode of the heating film to a stop heating mode, so as to stop heating the battery; wherein the fifth temperature threshold is greater than the first temperature threshold. In this way, when the charger is a non-fast charger, the working mode of the heating film and the charging time can be adjusted according to the temperature of the battery, so as to meet the charging demand of the battery in a low-temperature environment.

[0028] In an optional implementation, the control module includes a pulse width modulation (PWM) unit; the pulse width modulation (PWM) unit is configured to control the turn-on and turn-off of the first switching unit, so that the heating film heats the battery at a first heating power; wherein the first heating power is less than the maximum output power of the non-fast charging charger. In this way, the control of the heating power of the heating film can be realized by using PWM.

[0029] In an optional implementation, the control module is further configured to, in response to the temperature of the battery being greater than or equal to a first temperature threshold, control the non-fast charging unit to charge the battery, control the first switching unit to be in an off state, and control the heating film to be in a stop heating mode. In this way, it is indicated that the temperature of the battery can normally charge, and heating is not required, thereby saving energy.

[0030] In an optional implementation, the charging module further includes a non-fast charging unit; one end of the non-fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; the heating module further includes a first switching unit, the first switching unit is coupled between the charger interface and the heating film; in the case that the charger is not connected to the charger interface, the control module is configured to, in response to the display screen being on and the first application being started, control the temperature detection module to detect the temperature of the battery; the control module is further configured to, in response to the temperature of the battery being less than a sixth temperature threshold, control the first switching unit and the non-fast charging unit to be in a turn-on state, so that the battery supplies power to the heating film through the non-fast charging unit, and control the heating film to heat the battery; the control module is further configured to, in response to the temperature of the battery being heated to be greater than or equal to the first temperature threshold, control the first switching unit and the non-fast charging unit to be in an off state, and adjust the working mode of the heating film to a stop heating mode to stop heating the battery; wherein the sixth temperature threshold is less than the first temperature threshold, and the sixth temperature threshold is less than 0℃. In this way, the battery can be normally discharged in a low temperature environment, avoiding affecting the power of the battery, and improving the user experience.

[0031] In an optional implementation, the control module is further configured to control the battery to supply power to the heating film at a target current value; the control module includes a pulse width modulation (PWM) unit; the pulse width modulation (PWM) unit is configured to control the turn-on and turn-off of the first switching unit, so that the heating film heats the battery at a second heating power; wherein the second heating power is less than or equal to the maximum heating power of the heating film. In this way, the control of the heating power of the heating film can be realized by using PWM.

[0032] In an optional implementation, the thickness of the heating film is less than or equal to 0.1 millimeter. In this way, the thin and light design of the electronic device can be facilitated while the battery is heated.

[0033] In a third aspect, the present application provides an electronic device, comprising: a battery and the low-temperature protection device of the battery in any one of the optional implementation manners of the second aspect, the low-temperature protection device of the battery being configured to protect the battery from low temperature.

[0034] In a fourth aspect, the present application provides a computer readable storage medium, comprising computer instructions, when the computer instructions are executed on an electronic device, the electronic device is caused to perform the low-temperature protection method of the battery in any one of the optional implementation manners of the first aspect.

[0035] In a fifth aspect, the present application provides a computer program product, when the computer program product is executed on a computer, the computer is caused to perform the low-temperature protection method of the battery in any one of the optional implementation manners of the first aspect.

[0036] It can be understood that the beneficial effects achieved by the technical solutions provided in the third aspect to the fifth aspect described above can refer to the beneficial effects in the first aspect, the second aspect and any one of the optional implementation manners thereof, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0038] FIG. 1 is a schematic diagram of a charging scene of a terminal device provided by the present embodiment;

[0039] FIG. 2 is a partial structural exploded schematic diagram of an electronic device provided by the present embodiment;

[0040] FIG. 3 is a structural schematic diagram of a heating film provided by the present embodiment;

[0041] FIG. 4 is a first flowchart of a low-temperature protection method of a battery provided by the present embodiment;

[0042] FIG. 5 is a second flowchart of a low-temperature protection method of a battery provided by the present embodiment;

[0043] FIG. 6 is a third flowchart of a low-temperature protection method of a battery provided by the present embodiment;

[0044] FIG. 7 is a fourth flowchart of a low-temperature protection method of a battery provided by the present embodiment;

[0045] FIG. 8 is a fifth flowchart of a low-temperature protection method of a battery provided by the present embodiment;

[0046] FIG. 9 is a structural block diagram of a low-temperature protection device of a battery provided by the present embodiment;

[0047] FIG. 10 is a structural schematic diagram of a chip system provided by the embodiment. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0049] Hereinafter, the terms "first", "second", and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0050] In addition, in the present application, the orientation terms such as "upper", "lower", "inner", "outer", and the like are defined with respect to the orientation of the components shown in the drawings. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0051] Lithium batteries have high energy density and can provide larger capacity of electric energy under the same volume and weight, so that lithium batteries are widely used in various terminal devices to provide more electric energy for the terminal devices. At the same time, lithium batteries have high charging efficiency and fast charging capability, which can obtain larger capacity of electric energy in a short time, and can improve the use efficiency and convenience of the terminal devices.

[0052] At present, in order to improve the portability of the terminal device, a lithium battery is often arranged in the terminal device to use the lithium battery as an independent power supply of the terminal device, so as to provide electric energy for the terminal device, so that the terminal device can still work normally when there is no external power supply or power failure, thereby improving the use convenience of the terminal device.

[0053] FIG. 1 is a schematic diagram of a charging scene of a terminal device provided by the embodiment.

[0054] As shown in FIG. 1, when the power of the lithium battery 110 in the terminal device 100 is insufficient, the terminal device 100 can be externally connected to the charger 10 and the power supply 20 to charge the lithium battery 110 in the terminal device 100, so as to maintain the normal operation of the terminal device 100. When the terminal device 100 is not connected to the charger 10, the lithium battery 110 in the terminal device 100 can be discharged to provide power for the normal operation of the terminal device 100.

[0055] Optionally, when charging the lithium battery 110 in the terminal device 100, the charger 10 can be a wired charger as shown in (a) of FIG. 1, or the charger 10 can also be a wireless charger as shown in (b) of FIG. 1. The form of the charger 10 is not limited in the embodiment.

[0056] Further, the working temperature of the lithium battery 110 greatly affects the charge and discharge performance of the lithium battery 110. When the lithium battery 110 is in a low-temperature (less than 0℃) environment, the flowability of the electrolyte in the lithium battery 110 will decrease, causing the ion migration speed in the electrolyte to slow down. At the same time, the diffusion rate of lithium ions will also decrease, causing the lithium ions to be difficult to move uniformly inside the lithium battery 110, and even to be deposited on the negative electrode. In addition, the electrochemical reaction rate of the lithium battery 110 in a low-temperature environment will also decrease significantly, causing the internal resistance of the lithium battery 110 to increase.

[0057] Based on the above reasons, the charge and discharge performance of the lithium battery 110 will be greatly affected in a low-temperature environment, which is easy to cause the capacity and charge and discharge capability of the lithium battery 110 to decrease, affecting the user's experience.

[0058] Specifically, for a general lithium battery 110, when the temperature is less than 0℃, its charge performance will be affected. In an extremely low-temperature condition, the electrolyte of the lithium battery 110 will become more viscous, the ion migration speed will slow down, causing the charging efficiency to decrease. Therefore, in a low-temperature environment below 0℃, the charging capability of the lithium battery 110 can be limited, or even unable to charge.

[0059] However, the lithium battery 110 can still discharge below 0℃. Although low temperature will cause the internal resistance of the lithium battery 110 to increase and the charge transfer capability to decrease, the lithium battery 110 can still release energy and supply current. However, it should be noted that in an extremely low-temperature (such as less than -10℃) environment, the discharge capacity and discharge capability of the lithium battery 110 will also decrease.

[0060] FIG. 2 is a partial structure exploded schematic view of an electronic device provided in the embodiment.

[0061] As shown in FIG. 2, in order to solve the above problems, the present application provides an electronic device 200 capable of heating the battery in a low temperature environment.

[0062] In some embodiments, the electronic device 200 can be a mobile phone, a tablet computer, a handheld computer, a personal computer (PC), an ultra-mobile personal computer (UMPC), a netbook, and an electronic device 200 such as a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, a vehicle-mounted device, etc. The specific type of the electronic device 200 is not particularly limited in the present application.

[0063] Further, the electronic device 200 includes a back cover 210, a middle frame 220, a display screen assembly 230, a battery 240, a heating film 250, and a circuit board 260. The back cover 210, the battery 240, the circuit board 260, the middle frame 220, and the display screen assembly 230 can be stacked and connected in sequence along the thickness direction of the electronic device 200.

[0064] Specifically, the back cover 210 and the display screen assembly 230 are respectively arranged on opposite sides of the middle frame 220 and are buckled and connected with the middle frame 220, so as to form accommodating cavities between the middle frame 220 and the back cover 210 and between the middle frame 220 and the display screen assembly 230, for arranging other components of the electronic device 200, such as a loudspeaker module, a camera module (not shown in the figure), etc. The display screen assembly 230 is electrically connected to the circuit board 260 to display pictures under the control of the circuit board 260. The side of the middle frame 220 facing the back cover 210 is provided with a battery compartment 221, and the battery 240 is arranged in the battery compartment 221, so as to realize the accommodation and protection of the battery 240. The circuit board 260 can be arranged at a position of the middle frame 220 where the battery compartment 221 is not arranged, and the battery 240 can be electrically connected to the circuit board 260, so as to facilitate the control of the circuit board 260 on the power and charging / discharging performance of the battery 240.

[0065] Further, the heating film 250 can be arranged at the outer periphery of the battery 240 to heat the battery 240, thereby protecting the battery 240 in a low-temperature environment to reduce the influence of the low-temperature environment on the charge-discharge performance of the battery 240. The thickness of the heating film 250 can be less than or equal to 0.1 mm, which can reduce the influence on the overall volume of the electronic device 200 and facilitate the miniaturization design of the electronic device 200.

[0066] Optionally, the heating film 250 can be a polyimide (PI) heating film, a polyetherimide (PEI) heating film, a polyethylene terephthalate (PET) heating film, a rubber heating film, or a silicone heating film.

[0067] Specifically, the PI heating film can include an insulating base layer and a heating layer. The insulating base layer can be two layers, and the heating layer is arranged between the two insulating base layers to protect the heating layer by the insulating base layer. The insulating base layer can be a thin film layer made of PI material, and the heating layer can be a heating structure formed by a nickel sheet pattern, a copper sheet pattern, a stainless steel pattern, an indium-tin oxide ink pattern, a graphene pattern, and a nano-carbon fluoride paste pattern. In this way, after the heating layer is powered on, the heating layer will heat up, thereby heating the battery 240.

[0068] In other examples, the insulating base layer of the PI heating film can also be one layer, as long as it can insulate and protect the heating layer, which is not limited in the embodiment.

[0069] It is worth noting that the structure of the PEI heating film and the PET heating film is similar to that of the PI heating film, except that the material of the insulating base layer is different, which will not be described here.

[0070] The silicone heating film can be formed by arranging vulcanized wire or etched foil in the middle of the silicone insulating material, so as to insulate and protect the vulcanized wire or etched foil by the silicone insulating material, and also to power on the vulcanized wire or etched foil to heat up after being powered on, thereby heating the battery 240.

[0071] It can be understood that the silicone heating film can also include an insulating base layer and a heating layer. The insulating base layer can be a thin film layer made of silicone material, and the heating layer can be a heating structure formed by a nickel sheet pattern, a copper sheet pattern, a stainless steel pattern, an indium-tin oxide ink pattern, a graphene pattern, and a nano-carbon fluoride paste pattern.

[0072] It is worth noting that the structure of the rubber heating film is similar to that of the silicone heating film, except that the insulating material is different, which will not be described here.

[0073] As shown in (a) of FIG. 2, in an example, the heating film 250 can be arranged between the battery 240 and the back cover 210, and the heating film 250 can be attached to the side of the battery 240 facing the back cover 210. Meanwhile, the heating film 250 can be electrically connected to the circuit board 260 to provide power for the heating film 250 through the circuit board 260. In this way, the heating film 250 can heat the battery 240 under the control of the circuit board 260 to achieve low-temperature protection of the battery 240, and attaching the heating film 250 to the large surface of the battery 240 can also achieve uniform heating of the battery 240.

[0074] Optionally, after the battery 240 is installed in the battery compartment 221, the heating film 250 can be arranged in the gap between the battery 240 and the back cover 210. Alternatively, if there is no gap between the battery 240 and the back cover 210, a groove can be provided on the back cover 210 corresponding to the position of the battery 240 for accommodating the heating film 250.

[0075] As shown in (b) of FIG. 2, in another example, the heating film 250 can be arranged between the battery 240 and the middle frame 220, and the heating film 250 can be attached to the side of the battery 240 facing the middle frame 220. Meanwhile, the heating film 250 can be electrically connected to the circuit board 260 to provide power for the heating film 250 through the circuit board 260. In this way, the heating film 250 can heat the battery 240 under the control of the circuit board 260 to achieve low-temperature protection of the battery 240, and attaching the heating film 250 to the large surface of the battery 240 can also achieve uniform heating of the battery 240.

[0076] Optionally, the middle frame 220 can be provided with a groove for accommodating the heating film 250 at the bottom of the battery compartment 221, and the groove depth is equal to the thickness of the heating film 250. In this way, after the heating film 250 is arranged in the groove, the battery 240 can still be stably arranged in the battery compartment 221, thereby avoiding affecting the arrangement of the battery 240.

[0077] Alternatively, the depth of the battery compartment 221 of the middle frame 220 can be equal to the sum of the thickness of the battery 240 and the thickness of the heating film 250, thereby achieving accommodation of the heating film 250 and the battery 240 while avoiding re-slotting, simplifying the process, and reducing the manufacturing difficulty.

[0078] As shown in (c) of FIG. 2, in another example, the heating film 250 can be arranged between the battery 240 and the back cover 210 and between the battery 240 and the middle frame 220, and the heating film 250 can be attached to the side of the battery 240 facing the back cover 210 and the side of the battery 240 facing the middle frame 220. Meanwhile, the heating film 250 can be electrically connected to the circuit board 260 to provide power for the heating film 250 through the circuit board 260. In this way, the heating film 250 can heat the two sides of the battery 240 under the control of the circuit board 260, which can not only achieve low-temperature protection of the battery 240 but also improve the heating efficiency of the battery 240.

[0079] It should be noted that the specific arrangement of the heating film 250 on both sides of the battery 240 can refer to the above description, which will not be repeated here.

[0080] As shown in (d) of FIG. 2, in another example, when the thickness of the middle frame 220 is relatively thin, the heating film 250 can be arranged between the middle frame 220 and the display screen assembly 230, and the heating film 250 can be attached to the side of the middle frame 220 facing the display screen assembly 230 and arranged corresponding to the position of the battery compartment 221. Meanwhile, the heating film 250 can be electrically connected to the circuit board 260 to provide power for the heating film 250 through the circuit board 260. In this way, the heating film 250 can heat the middle frame 220, and the heat can be transferred to the battery 240 through the middle frame 220, thereby achieving heating of the battery 240.

[0081] As shown in (b) of FIG. 2 and (c) of FIG. 2, if the heating film 250 is arranged between the middle frame 220 and the battery 240, the middle frame 220 needs to provide space for arranging the heating film 250. If the thickness of the middle frame 220 is less than 5 times the thickness of the heating film 250, it is difficult to arrange a groove for accommodating the heating film 250 while maintaining the strength of the middle frame 220. At this time, the heating film 250 can be arranged on the side of the middle frame 220 away from the battery compartment 221. The side of the middle frame 220 away from the battery compartment 221 is often a flat surface, so the heating film 250 can be directly attached to the flat surface of the middle frame 220, without the need for a separate groove, thereby ensuring the structural strength of the middle frame 220.

[0082] Specifically, when the thickness of the heating film 250 is 0.1 mm, if the thickness of the middle frame 220 is less than 0.5 mm, the heating film 250 can be arranged between the middle frame 220 and the display screen assembly 230, thereby avoiding the slot on the middle frame 220 and affecting the structural strength of the middle frame 220.

[0083] In addition, since the middle frame 220 is often made of metal, such as aluminum, copper, etc., the heat conduction effect is good, and the heat can be quickly conducted to the battery 240, thereby having little effect on the heating effect of the heating film 250.

[0084] FIG. 3 is a structural schematic diagram of the heating film provided in the embodiment.

[0085] As shown in FIGS. 2 and 3, further, the heating film 250 can be electrically connected to the circuit board 260 through a board-to-board (BTB) connector, a conductive wire, a metal spring, a gold finger, a metal pin, or the like.

[0086] For example, as shown in (a) of FIG. 3, the heating film 250 can be electrically connected to the circuit board 260 through a single BTB connector 251. As shown in (b) of FIG. 3, the heating film 250 can be electrically connected to the circuit board 260 through a double BTB connector 251. As shown in (c) of FIG. 3, the heating film 250 can be electrically connected to the circuit board 260 through a solder joint 252 and a conductive wire 253. As shown in (d) of FIG. 3, the heating film 250 can be electrically connected to the circuit board 260 through two metal springs 254 arranged close to each other. As shown in (e) of FIG. 3, the heating film 250 can be electrically connected to the circuit board 260 through two metal springs 254 arranged far away from each other.

[0087] It is worth noting that the heating film 250 can also be electrically connected to the circuit board 260 in other manners, which are not limited in the embodiment.

[0088] In order to achieve the low-temperature protection of the heating film 250 on the battery 240, the embodiment further provides a low-temperature protection method applied to the battery 240 of the electronic device 200, so as to achieve the protection of the battery 240 when the electronic device 200 is in a low-temperature environment.

[0089] FIG. 4 is a first flowchart of the low-temperature protection method of the battery provided in the embodiment.

[0090] As shown in FIG. 4, the low-temperature protection method of the battery 240 provided in the embodiment includes:

[0091] Step S110: In response to the charger being connected to the electronic device 200, determining the type of the charger.

[0092] In this embodiment, when the battery 240 in the electronic device 200 needs to be charged, a charger is connected to the electronic device 200. The charger can be a fast charging charger or a non-fast charging charger, and the electronic device 200 has a fast charging mode and a non-fast charging mode. In this way, the electronic device 200 can switch between the fast charging mode and the non-fast charging mode to adapt to different types of chargers. At the same time, the electronic device 200 supports the fast charging mode, which can realize fast charging of the battery 240 to improve charging efficiency and improve user experience.

[0093] For example, the charger can be connected to the electronic device 200 through a charger interface on the electronic device 200.

[0094] Optionally, the charger interface on the electronic device 200 can include a Type-C interface, a Lightning interface, a Micro USB interface, and a wireless charging interface. In other words, the charger can be connected to the electronic device 200 through a conductive wire, or can be connected to the electronic device 200 through wireless charging technology. The charger interface of the electronic device 200 is not limited in this embodiment.

[0095] Further, after the charger is connected to the electronic device 200, the electronic device 200 can first determine the type of the charger, so as to facilitate subsequent selection of a suitable charging mode for charging the battery 240.

[0096] Step S120: Determine the charging mode and the working mode of the heating film 250 based on the type of the charger and the temperature of the battery 240.

[0097] As can be seen from the above description of the structure of the electronic device 200, the heating film 250 in the electronic device 200 can be used to heat the battery 240. The working mode of the heating film 250 includes a heating mode and a stop heating mode. When the battery 240 needs to be heated, the working mode of the heating film 250 can be the heating mode to heat the battery 240. When the battery 240 does not need to be charged, the working mode of the heating film 250 can be the stop heating mode, so that the battery 240 is no longer charged.

[0098] In this embodiment, when the temperature of the battery 240 is different, the charging mode suitable for the battery 240 is also different. For example, when the temperature of the battery 240 is 0-10℃, the charging mode suitable for the battery 240 is a small-current non-fast charging mode, and when the temperature of the battery 240 is greater than 10℃, a small-current non-fast charging mode can be used, or a large-current fast charging mode can be used. Therefore, after determining the type of the charger, the charging mode needs to be determined in combination with the temperature of the battery 240.

[0099] Further, when determining the working mode of the heating film 250, the type of the charger and the temperature of the battery 240 also need to be considered. Under the specification of safe use of the battery 240, if the temperature of the battery 240 is less than 0℃, the battery 240 cannot be charged. At this time, the heating film 250 needs to heat the battery 240, so that the temperature of the battery 240 rises to meet the charging condition. Therefore, the working mode of the heating film 250 needs to be determined based on the temperature of the battery 240.

[0100] In addition, the working mode of the heating film 250 can also be determined in combination with the type of the charger. If the type of the charger is a fast charging charger, when the electronic device 200 can adopt a fast charging mode for charging, the fast charging process often generates a lot of heat during charging, which can cause the battery 240 to heat up while charging. At this time, the working mode of the heating film 250 can be in a stop heating mode, so as to save energy resources.

[0101] In the embodiment, after the charger is connected to the electronic device 200, the electronic device 200 can first determine the type of the charger. After determining the type of the charger, the battery 240 can adopt a suitable charging method under different temperatures and different charger types, so as to improve the charging efficiency and meet the charging needs of the user. Further, the method provided in the embodiment can also enable the heating film 250 to select a suitable working mode under different temperatures and different charger types, so as to achieve low-temperature protection of the battery 240 while saving energy resources.

[0102] FIG. 5 is a second flowchart of a low-temperature protection method of a battery according to an embodiment.

[0103] As shown in FIG. 5, in some embodiments, the low-temperature protection method of the battery 240 includes:

[0104] Step S210: In response to the charger being connected to the electronic device 200, determining the type of the charger.

[0105] It should be noted that the description of step S210 can refer to the description of step S110 described above, which will not be repeated here.

[0106] Step S211: In response to the type of the charger being a fast charging charger, detecting the temperature of the battery 240.

[0107] In the embodiment, when the type of the charger accessed by the electronic device 200 is the fast charging charger, the charging mode of the electronic device 200 can be the non-fast charging mode or the fast charging mode, and the temperature of the battery 240 needs to be selected to enable the battery 240 to be charged in the appropriate mode, to meet the charging needs of the user and ensure the charging safety of the battery 240. Therefore, after determining the type of the charger, the temperature of the battery 240 also needs to be detected.

[0108] For example, the temperature of the battery 240 can be detected by using a temperature sensor, a temperature measuring resistor or other structure capable of detecting the temperature. In the embodiment, the temperature detection method of the battery 240 is not limited.

[0109] Step S212: Determine whether the temperature of the battery 240 is less than a first temperature threshold.

[0110] In the embodiment, after determining the type of the charger, the charging mode and the working mode of the heating film 250 can be selected according to the temperature of the battery 240. In other words, the temperature of the battery 240 can be divided into different ranges in the embodiment, and each range corresponds to a different charging mode and a different working mode of the heating film 250, so that the charging mode and the working mode of the heating film 250 can be quickly selected to improve the response speed.

[0111] Step S213: In response to the temperature of the battery 240 being less than the first temperature threshold, determine that the working mode of the heating film 250 is the heating mode to charge the battery 240.

[0112] In the embodiment, when the temperature of the battery 240 is less than the first temperature threshold, the heating film 250 can be in the heating mode to heat the battery 240, and the battery 240 is not charged at this time, so as to ensure the charging safety of the battery 240.

[0113] Specifically, the first temperature threshold can be 0℃. When the temperature of the battery 240 is less than 0℃, the battery 240 cannot be safely charged in general, and the heating film 250 can be used to heat the battery 240 at this time, so that the temperature of the battery 240 can be increased to a range in which the battery 240 can be safely charged, to facilitate charging.

[0114] It can be understood that in other embodiments, the first temperature threshold can also be 1℃, 0.5℃, -0.5℃, -1℃, etc. The first temperature threshold can be determined according to the performance of the battery 240, and is not limited in the embodiment.

[0115] FIG. 6 is a third flowchart of a low-temperature protection method of a battery provided in the embodiment.

[0116] As shown in FIG. 6, in some embodiments, the above step S213 can be implemented by the following steps:

[0117] Step S2131: adjusting the output power of the charger to the target output power in response to the temperature of the battery 240 being less than the first temperature threshold.

[0118] In the present embodiment, when the temperature of the battery 240 is less than the first temperature threshold, the output power of the charger can be first adjusted to the target output power. In this way, when the battery 240 is not being charged, the charger can first be used to provide power to the heating film 250, so that the heating film 250 can be in the heating mode.

[0119] Further, the target output power can be determined by the following method:

[0120] Step S213a: detecting the maximum output power of the charger.

[0121] In the present embodiment, when adjusting the output power of the charger, the maximum output power of the charger needs to be first determined, so as to avoid the target output power being greater than the maximum output power of the charger, resulting in unreasonable setting of the target output power and failure to achieve.

[0122] For example, the parameters and specifications of the charger are usually stored in the charger, so that the electronic device 200 can obtain the capability of the charger. The parameters of the charger can include the maximum output voltage, the maximum output current, and the maximum output power, etc. In this way, the electronic device 200 can directly read the parameters and specifications stored in the charger, so as to detect the maximum output power of the charger.

[0123] Step S213b: comparing the maximum output power of the charger with the preset output power.

[0124] In the present embodiment, after detecting the maximum output power of the charger, the maximum output power of the charger can be compared with the preset output power, so as to determine the target output power value.

[0125] Further, the preset output power can be an output power determined in advance according to the type of the charger and the performance of the heating film 250. If the output power of the charger is the preset output power, the heating efficiency of the heating film 250 will be better, and the battery 240 can be quickly heated. Alternatively, the preset output power can be the maximum input power that the heating film 250 can withstand, so as to avoid the output power of the charger being greater than the maximum input power that the heating film 250 can withstand, resulting in overloading of the heating film 250 and burning of the heating film 250. It can be understood that the preset output power can be adjusted according to actual conditions, which is not limited in the present embodiment.

[0126] Step S213c: in response to the maximum output power of the charger being greater than or equal to the preset output power, taking the preset output power as the target output power.

[0127] When the maximum output power of the charger is greater than or equal to the preset output power, it indicates that the performance of the charger can meet the requirement of the heating film 250 heating the battery 240 at the preset output power, and the preset output power can be taken as the target output power, thereby improving the heating efficiency of the battery 240.

[0128] Step S213d: in response to the maximum output power of the charger being less than the preset output power, taking the maximum output power of the charger as the target output power.

[0129] When the maximum output power of the charger is less than the preset output power, it indicates that the performance of the charger cannot meet the requirement of the preset output power. At this time, the maximum output power of the charger can be taken as the target output power, so that the charger can supply power to the heating film 250 with the greatest possible power, thereby improving the heating efficiency of the battery 240 by the heating film 250 as much as possible.

[0130] For example, if the preset output power is 30W and the maximum output power of the charger is 40W, the preset output power is less than the maximum output power of the charger, and the target output power can be 30W. If the preset output power is 30W and the maximum output power of the charger is 20W, the preset output power is greater than the maximum output power of the charger, and the target output power can be 20W.

[0131] It should be noted that in other embodiments, the target output power can also be determined in other ways, which are not limited in the present embodiment.

[0132] Step S2132: electrically connecting the heating film 250 to the charger, so that the charger supplies power to the heating film 250 at the target output power to heat the battery 240.

[0133] In the present embodiment, after the output power of the battery 240 is adjusted to the target output power, the heating film 250 can be electrically connected to the charger, so that the charger supplies power to the heating film 250 to charge the battery 240.

[0134] For example, a switch structure can be provided between the heating film 250 and the charger. In this way, when the switch structure is turned on, the electrical connection between the heating film 250 and the charger can be realized, so that the charger can supply power to the heating film 250. When the switch structure is turned off, the electrical connection between the heating film 250 and the charger can be disconnected, thereby stopping the charger from supplying power to the heating film 250.

[0135] Step S2133: detecting the actual heating power of the heating film 250 to the battery 240.

[0136] When the charger supplies power to the heating film 250 at the target output power, and the heating film 250 heats the battery 240, in order to facilitate the control of the heating power of the heating film 250, the actual heating power of the heating film 250 to the battery 240 can be detected to determine whether the preset value is met, so as to ensure the heating efficiency of the battery 240.

[0137] For example, the actual heating power of the heating film 250 to the battery 240 can be obtained by measuring the actual voltage and the actual current of the heating film 250 when heating the battery 240. The electronic device 200 can use an analog-to-digital converter (ADC) to measure the actual voltage and the actual current of the heating film 250, so as to obtain the actual heating power of the heating film 250 by using the actual voltage and the actual current.

[0138] Step S2134: determining whether the actual heating power of the heating film 250 meets the set power range requirement.

[0139] In this embodiment, after obtaining the actual heating power of the heating film 250, the actual heating power can be compared with the set power range to determine whether the actual heating power of the heating film 250 meets the set value.

[0140] For example, the set power range can be determined according to the target output power of the charger. When the charger supplies power to the heating film 250 at the target output power, the actual power input to the heating film 250 may be different from the target output power due to the influence of the path impedance, and the set power range can be determined according to the target output power and the path impedance.

[0141] Specifically, if the target output power is 30W, the set power range can be 28W-32W, and the difference range of the set power range and the target output power can be used to accommodate the path impedance of the path from the charger to the heating film 250.

[0142] Alternatively, the set power range can also be determined according to the heating efficiency of the heating film 250 to the battery 240. For example, the set power range can be directly set to 25W-40W, as long as the actual heating power meets the set power requirement.

[0143] It is worth noting that the set power range can be determined according to the actual situation, which is not limited in this embodiment.

[0144] Step S2135: continuing heating in response to the actual heating power meeting the set power range requirement.

[0145] When the actual heating power of the heating film 250 meets the set power range requirement, it indicates that the heating efficiency of the heating film 250 on the battery 240 is as expected, and the battery 240 can continue to be heated.

[0146] Step S2136: In response to the actual heating power not meeting the set power range requirement, the output voltage of the charger is adjusted to adjust the actual output power of the charger.

[0147] When the actual heating power of the heating film 250 does not meet the set power range requirement, it indicates that the heating efficiency of the heating film 250 on the battery 240 is not as expected, and the actual heating power of the heating film 250 needs to be adjusted. Since the power supply of the heating film 250 comes from the charger, if the actual heating power of the heating film 250 does not meet the requirement, the heating power of the heating film 250 can be adjusted by adjusting the actual output power of the charger.

[0148] Specifically, the actual output power of the charger can be achieved by adjusting the output voltage of the charger. In the case that the output current of the charger is unchanged, adjusting the output voltage of the charger can achieve the output power of the charger.

[0149] In an example, when the actual heating power of the heating film 250 is less than the set power range, the output voltage of the charger can be increased, so that the actual output power of the charger can be increased to increase the actual heating power of the heating film 250.

[0150] Specifically, in the case that the output power of the charger is 30W, the output voltage is 10V, and the output current is 3A, if the actual heating power of the heating film 250 is less than the set power range, the output voltage of the charger can be increased by 50mV, so that the output voltage of the charger is 10.05V. After adjusting the output voltage of the charger, the actual heating power of the heating film 250 is detected again. If the heating power of the heating film 250 is still less than the set power range, the output voltage of the charger can continue to be increased by 50mV until the output voltage of the charger reaches the maximum output voltage limit or the actual heating power of the heating film 250 meets the set power range requirement.

[0151] In another example, when the actual heating power of the heating film 250 is greater than the set power range, the output voltage of the charger can be reduced, so that the actual output power of the charger can be reduced to reduce the actual heating power of the heating film 250.

[0152] Specifically, in the case that the output power of the charger is 30W, the output voltage is 10V, and the output current is 3A, if the actual heating power of the heating film 250 is greater than the set power range, the output voltage of the charger can be reduced by 50mV, so that the output voltage of the charger is 9.95V. After the output voltage of the charger is adjusted, the actual heating power of the heating film 250 is detected again. If the heating power of the heating film 250 is still greater than the set power range, the output voltage of the charger can be continuously reduced by 50mV until the actual heating power of the heating film 250 meets the requirement of the set power range.

[0153] Please continue to refer to FIG. 5, the low-temperature protection method of the battery 240 further comprises:

[0154] Step S214: determining whether the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold and less than the second temperature threshold.

[0155] Wherein, the second temperature threshold is greater than the first temperature threshold.

[0156] For example, the second temperature threshold can be 10℃. Alternatively, the second temperature threshold can also be 9℃, 9.5℃, 10.5℃, 11℃, etc., which is not limited in the embodiment.

[0157] In the process of safe charging of the battery 240, when the temperature of the battery 240 is within a certain range, the battery 240 can be charged with a small current. When the temperature of the battery 240 is heated to this range, the battery 240 can be charged with a small current. In the process of heating the battery 240, the temperature of the battery 240 needs to be detected at any time so as to charge the battery 240 in time.

[0158] It is worth noting that the detection of the temperature of the battery 240 can refer to the foregoing description, which will not be repeated here.

[0159] Step S215: in response to the temperature of the battery 240 being heated to be greater than or equal to the first temperature threshold and less than the second temperature threshold, charging the battery 240 in a non-fast charging mode.

[0160] In the embodiment, if the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold, the battery 240 can be charged, but when the temperature of the battery 240 is still less than the second temperature threshold, it is indicated that only small current charging can be performed. At the same time, since the non-fast charging mode is small current charging, when the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold and less than the second temperature threshold, the battery 240 can be charged in the non-fast charging mode. In this way, the charging demand of the battery 240 can be met as soon as possible in a low-temperature environment.

[0161] For example, the electronic device 200 can use an internal non-fast charging charging unit, such as a buck charging unit, to charge the battery 240 with a small current. The buck charging unit can output a current of 2A to the battery 240 to charge the battery 240. In this way, the battery 240 can start charging during the heating process to further improve the charging efficiency.

[0162] It should be noted that if the temperature of the battery 240 is not heated to be greater than or equal to the first temperature threshold, the heating film 250 can continue to heat the battery 240, and the battery 240 can not be charged.

[0163] Step S216: Determine whether the temperature of the battery 240 is heated to be greater than or equal to the second temperature threshold and less than the third temperature threshold.

[0164] The third temperature threshold is greater than the second temperature threshold.

[0165] For example, the third temperature threshold can be 15°C. Alternatively, the second temperature threshold can also be 14°C, 14.5°C, 15.5°C, 16°C, etc., which is not limited in the embodiment.

[0166] During the safe charging of the battery 240, when the temperature of the battery 240 is within a certain range, the battery 240 can be charged with a large current to improve the charging efficiency of the battery 240. When the temperature of the battery 240 is heated to this range, the battery 240 can be charged with a large current. During the heating and charging of the battery 240, the temperature of the battery 240 needs to be detected at any time so that the battery 240 can be charged with a large current in time.

[0167] It should be noted that the detection of the temperature of the battery 240 can refer to the foregoing description, which will not be repeated here.

[0168] Step S217: In response to the temperature of the battery 240 being heated to be greater than or equal to the second temperature threshold and less than the third temperature threshold, the non-fast charging mode is switched to the fast charging mode to charge the battery 240.

[0169] In this embodiment, if the temperature of the battery 240 is heated to be greater than or equal to the second temperature threshold, the battery 240 can be charged with a large current, but when the temperature of the battery 240 is still less than the third temperature threshold, it indicates that the battery 240 still needs to be heated. Although a certain amount of heat is generated when the battery 240 is charged with a large current, if the ambient temperature of the battery 240 is low and the heating is not continued when the battery 240 is charged with a large current, the temperature of the battery 240 can continue to drop, so that the temperature of the battery 240 cannot continue to meet the requirements of the large current charging. In other words, when the temperature of the battery 240 is not heated to the third temperature threshold, if the heating of the battery 240 is stopped, the heat generated by the large current charging will be difficult to maintain the current temperature of the battery 240, thereby causing the temperature of the battery 240 to drop and unable to achieve safe charging of the large current.

[0170] At the same time, since the fast charging mode is a large current charging, when the temperature of the battery 240 is heated to be greater than or equal to the second temperature threshold and less than the third temperature threshold, the battery 240 can be charged in the fast charging mode. In this way, the charging efficiency of the battery 240 can be improved in a low temperature environment.

[0171] For example, the electronic device 200 can use an internal fast charging unit, such as a charge pump charging unit, to charge the battery 240 with a large current. The charge pump charging unit can output a current of 8A to the battery 240 to charge the battery 240. In this way, the battery 240 can start the fast charging mode during the heating process, effectively improve the charging efficiency, and meet the charging needs of users in a low temperature environment.

[0172] It is worth noting that if the temperature of the battery 240 is not heated to be greater than or equal to the second temperature threshold, the non-fast charging unit can continue to charge the battery 240, and the heating film 250 can continue to heat the battery 240.

[0173] Step S218: Determine whether the temperature of the battery 240 is heated to be greater than or equal to the third temperature threshold.

[0174] In this embodiment, if the temperature of the battery 240 is heated to be greater than or equal to the third temperature threshold, the safety charging requirements of the fast charging unit can be met, and the heat generated by the fast charging unit during charging can also maintain the temperature of the battery 240 itself, so that the battery 240 does not need to be heated, thereby saving energy.

[0175] Step S219: In response to the temperature of the battery 240 being heated to be greater than or equal to the third temperature threshold, the working mode of the heating film 250 is adjusted to a stop heating mode to stop heating the battery 240.

[0176] When the temperature of the battery 240 is heated to be greater than or equal to the third temperature threshold, it indicates that the temperature of the battery 240 has been in the temperature range required by the safety charging, and the working mode of the heating film 250 can be adjusted to the stop heating mode, so as to stop heating the battery 240, thereby saving energy.

[0177] For example, the electronic device 200 can disconnect the switch structure between the heating film 250 and the charger, so that the charger cannot supply power to the heating film 250, so that the heating film 250 can be in the stop heating mode.

[0178] It is worth noting that if the temperature of the battery 240 is not heated to be greater than or equal to the third temperature threshold, the fast charging unit can continue to charge the battery 240, and the heating film 250 can continue to heat the battery 240.

[0179] Step S220: Determine whether the temperature of the battery 240 decreases to be less than the fourth temperature threshold.

[0180] The fourth temperature threshold is greater than the second temperature threshold and less than the third temperature threshold.

[0181] For example, the fourth temperature threshold can be 12°C. Alternatively, the fourth temperature threshold can also be 11.5°C, 12.5°C, 13°C, etc., which is not limited in the embodiment.

[0182] After the heating film 250 stops heating the battery 240, if the external environment temperature is low, it is difficult to maintain the temperature of the battery 240 by the heat generated by the fast charging unit, which will cause the temperature of the battery 240 to gradually decrease. In order to maintain the charging safety of the battery 240 in the large current charging process, it is necessary to determine whether the temperature of the battery 240 decreases to be less than the fourth temperature threshold.

[0183] Step S221: In response to the temperature of the battery 240 decreasing to be less than the fourth temperature threshold, the working mode of the heating film 250 is determined to be the heating mode to heat the battery 240.

[0184] In the embodiment, when the temperature of the battery 240 decreases to be less than the fourth temperature threshold, the heating film 250 can be restarted to continue heating the battery 240, so as to avoid the temperature of the battery 240 from decreasing too fast, so as to realize the temperature protection of the battery 240, so that the temperature of the battery 240 can be maintained in the safe temperature range of the large current charging, thereby ensuring the charging efficiency.

[0185] It is worth mentioning that if the temperature of the battery 240 does not drop to less than the fourth temperature threshold, the battery 240 can continue to be charged by the fast charging unit, and the heating film 250 does not need to heat the battery 240.

[0186] Further, after detecting the temperature of the battery 240 in the above step S211, the low-temperature protection method of the battery 240 further includes:

[0187] Step S222: Determine whether the temperature of the battery 240 is greater than or equal to the second temperature threshold and less than the third temperature threshold.

[0188] In this embodiment, if the initial temperature of the battery 240 is greater than or equal to the first temperature threshold, the battery 240 does not need to be heated and can be directly charged. At the same time, since different charging modes use different charging temperature conditions, the specific selection of the charging mode also needs to be further judged according to the initial temperature of the battery 240.

[0189] Step S223: In response to the temperature of the battery 240 being greater than or equal to the second temperature threshold and less than the third temperature threshold, the battery 240 is charged in a non-fast charging mode, and the heating film 250 is in a stop heating mode.

[0190] In this embodiment, if the initial temperature of the battery 240 is greater than or equal to the second temperature threshold and less than the third temperature threshold, it means that the battery 240 is in a safe temperature range that can be charged with a small current, and the heating film 250 does not need to heat the battery 240. The battery 240 can be directly charged by the non-fast charging unit, thereby saving energy.

[0191] In addition, when the initial temperature of the battery 240 is greater than or equal to the second temperature threshold, it means that the battery 240 is not in a low-temperature (0°C or below) environment, and the heating film 250 does not need to heat it for protection.

[0192] Step S224: In response to the temperature of the battery 240 being greater than or equal to the third temperature threshold, the battery 240 is charged in a fast charging mode, and the heating film 250 is in a stop heating mode.

[0193] In this embodiment, if the initial temperature of the battery 240 is greater than or equal to the third temperature threshold, it means that the battery 240 is in a safe temperature range that can be charged with a large current, and the heating film 250 does not need to heat the battery 240. The battery 240 can be directly charged by the fast charging unit, thereby saving energy.

[0194] FIG. 7 is a fourth flowchart of a low-temperature protection method of a battery according to an embodiment.

[0195] As shown in FIG. 7, in some embodiments, after determining the type of the charger in step S210, the low-temperature protection method of the battery 240 further includes:

[0196] Step S311: In response to the type of the charger being a non-fast charging charger, detecting the temperature of the battery 240.

[0197] In the present embodiment, when the type of the charger connected to the electronic device 200 is a non-fast charging charger, it is explained that the electronic device 200 can only be charged in the non-fast charging mode. At this time, the charging timing and the heating timing need to be determined according to the temperature of the battery 240.

[0198] For example, the temperature of the battery 240 can be tested by using a temperature sensor, a temperature measuring resistor, or other structures capable of detecting temperature. In the present embodiment, the method of detecting the temperature of the battery 240 is not limited.

[0199] Step S312: Determining whether the temperature of the battery 240 is less than a first temperature threshold.

[0200] As explained above, the safe temperature of the non-fast charging mode requires that the temperature of the battery 240 be greater than the first temperature threshold. Therefore, when the type of the charger is a non-fast charging charger, it is necessary to first determine whether the temperature of the battery 240 meets the safe temperature requirement of the non-fast charging mode.

[0201] Step S313: In response to the temperature of the battery 240 being less than the first temperature threshold, determining that the working mode of the heating film 250 is a heating mode to charge the battery 240.

[0202] In the present embodiment, when the temperature of the battery 240 is less than the first temperature threshold, the heating film 250 can be in the heating mode to heat the battery 240. At this time, the battery 240 is not charged, thereby ensuring the safety of charging the battery 240.

[0203] In one example, the specific implementation of step S313 can refer to the description of steps S2131-S2136, which will not be repeated here.

[0204] In another example, step S313 can be implemented in the following way:

[0205] Step S3131: In response to the temperature of the battery 240 being less than the first temperature threshold, electrically connecting the heating film 250 to the charger to enable the charger to supply power to the heating film.

[0206] In this embodiment, the charger is a non-fast charging charger, and the power of the non-fast charging charger is generally small, which will not cause the system overload phenomenon of the heating film 250, and the heating film 250 can be directly powered by the charger, so that the heating film 250 can heat the battery 240.

[0207] Step S3132: controlling the heating film 250 to heat the battery 240 at the first heating power by using the pulse width adjustment PWM.

[0208] The first heating power is less than the maximum output power of the non-fast charging charger.

[0209] For example, the first heating power can be a heating power set according to the temperature of the battery 240. If the temperature of the battery 240 is less than -10℃, the first heating power can be 8W. If the temperature of the battery 240 is greater than or equal to -10℃ and less than 0℃, the first heating power can be 5W.

[0210] In this embodiment, the heating power of the heating film 250 can be controlled by using the PWM, so as to control the heating process of the battery 240.

[0211] Further, the on-off state of the heating film 250 and the charger can be adjusted by adjusting the duty cycle of the PWM, so as to adjust the heating power of the heating film 250.

[0212] Specifically, in this embodiment, a switch structure can be arranged between the heating film 250 and the charger, and the on-off of the switch structure can be controlled by using the PWM, so as to control the on-off of the heating film 250 and the charger, and further adjust the heating power of the heating film 250.

[0213] For example, the duty cycle of the PWM represents the proportion of the high level in the whole cycle. When controlling the on-off state of the heating film 250 and the charger, the high level can correspond to the on of the switch structure, and the low level can correspond to the off of the switch structure. If the output power of the charger is 10W and the duty cycle of the PWM is 50%, the heating power of the heating film 250 is 5W. If the output power of the charger is 10W and the duty cycle of the PWM is 80%, the heating power of the heating film 250 is 8W. In this way, the control of the heating power of the heating film 250 can be facilitated.

[0214] Step S314: determining whether the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold and less than the fifth temperature threshold.

[0215] The fifth temperature threshold is greater than the first temperature threshold.

[0216] For example, the fifth temperature threshold can be 5℃. Alternatively, the fifth temperature threshold can also be 4℃, 4.5℃, 5.5℃, 6℃, etc., which are not limited in the embodiment.

[0217] It can be understood that the fifth temperature threshold can also be the same as the second temperature threshold, which is not limited in the embodiment.

[0218] During the safe charging process, the battery 240 can be charged with a small current when the temperature of the battery 240 is within a certain range. The battery 240 can be charged with a small current when the temperature of the battery 240 is heated to this range. During the heating of the battery 240, the temperature of the battery 240 needs to be detected at any time so as to charge the battery 240 in time.

[0219] It is worth noting that the detection of the temperature of the battery 240 can refer to the foregoing description, which will not be repeated here.

[0220] Step S315: In response to the temperature of the battery 240 being heated to be greater than or equal to the first temperature threshold and less than the fifth temperature threshold, the battery 240 is charged in a non-fast charging mode.

[0221] In the embodiment, when the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold, the battery 240 can be charged by using a non-fast charging unit in the electronic device 200. In this way, the charging demand of the battery 240 can be met as soon as possible in a low-temperature environment.

[0222] For example, the electronic device 200 can use an internal non-fast charging unit, such as a BUCK charging unit, to charge the battery 240 with a small current. The BUCK charging unit can output a current of 2A to the battery 240 to charge the battery 240. In this way, the battery 240 can start charging during the heating process to further improve the charging efficiency.

[0223] It is worth noting that if the temperature of the battery 240 is not heated to be greater than or equal to the first temperature threshold, the heating film 250 can continue to heat the battery 240, and the battery 240 can not be charged temporarily.

[0224] Step S316: Determine whether the temperature of the battery 240 is heated to be greater than or equal to the fifth temperature threshold.

[0225] In the embodiment, when the temperature of the battery 240 is heated to the fifth temperature threshold, the battery 240 can only be charged, so that the battery 240 no longer needs to be heated, thereby saving energy.

[0226] Step S317: In response to the temperature of the battery 240 being heated to be greater than or equal to the fifth temperature threshold, the working mode of the heating film 250 is adjusted to the stop heating mode to stop heating the battery 240.

[0227] When the temperature of the battery 240 is heated to be greater than or equal to the fifth temperature threshold, it indicates that the temperature of the battery 240 has been in the temperature range required for safe charging, and the working mode of the heating film 250 can be adjusted to the stop heating mode to stop heating the battery 240, thereby saving energy.

[0228] For example, the electronic device 200 can disconnect the switch structure between the heating film 250 and the charger, so that the charger cannot supply power to the heating film 250, and the heating film 250 can be in the stop heating mode.

[0229] It is worth noting that if the temperature of the battery 240 is not heated to be greater than or equal to the fifth temperature threshold, the battery 240 can continue to be charged by the non-fast charging unit, and the heating film 250 can continue to heat the battery 240.

[0230] Further, after detecting the temperature of the battery 240 in step S311, the low-temperature protection method of the battery 240 further includes:

[0231] Step S318: In response to the temperature of the battery 240 being greater than or equal to the first temperature threshold, the battery 240 is charged in the non-fast charging mode, and the heating film 250 is in the stop heating mode.

[0232] In this embodiment, if the initial temperature of the battery 240 is greater than or equal to the first temperature threshold, it indicates that the battery 240 is in a safe temperature range that can be charged with a small current, and the heating film 250 does not need to heat the battery 240. The battery 240 can be directly charged by the non-fast charging unit, thereby saving energy.

[0233] In addition, when the initial temperature of the battery 240 is greater than or equal to the first temperature threshold, it indicates that the battery 240 is not in a low-temperature (0°C or below) environment, and the heating film 250 does not need to heat it for protection.

[0234] It is worth noting that after step S317, steps S220-S221 as described above can also be included to achieve heat preservation protection of the battery 240, which will not be described here.

[0235] In this embodiment, when the battery 240 is in a low-temperature environment and needs to be charged, the heating film 250 can be used to heat the battery 240, thereby increasing the temperature of the battery 240 to meet the charging needs of the user and ensure the endurance of the battery 240 in the low-temperature environment. At the same time, the electronic device 200 can adjust the charging mode of the battery 240 and the working mode of the heating film 250 according to the type of the charger and the temperature of the battery 240, so that the charging mode can be matched with the working mode of the heating film 250. In this way, the battery 240 can be heated while being quickly charged and energy resources can be saved.

[0236] FIG. 8 is a fifth flowchart of a low-temperature protection method of a battery according to an embodiment.

[0237] As shown in FIG. 8, in some embodiments, the low-temperature protection method of the battery 240 further includes:

[0238] Step S410: In the case where the charger is not connected to the electronic device 200, detecting the temperature of the battery 240 in response to the display screen being turned on and the first application being started.

[0239] The first application can be any application in the electronic device 200, such as a camera application, a video application, a music application, a call application, etc. In this embodiment, the first application is not limited.

[0240] In this embodiment, in the case where the charger is not connected to the electronic device 200, the battery 240 is in a discharging state to support the normal operation of the electronic device 200. When the display screen of the electronic device 200 is turned on and the first application is started, the electronic device 200 needs to consume more power, so the battery 240 needs to be normally discharged to support the operation of the electronic device 200.

[0241] However, as described above, when the battery 240 is in a low-temperature environment, the viscosity of the electrolyte inside the battery 240 becomes large and the internal resistance of the battery 240 increases, which affects the capacity and discharging performance of the battery 240. Therefore, in order to ensure the normal discharging of the battery 240 in a low-temperature environment, the temperature of the battery 240 can be detected when the application is started to determine whether the battery 240 needs to be heated.

[0242] Step S411: Determining whether the temperature of the battery 240 is less than a sixth temperature threshold.

[0243] The sixth temperature threshold is less than 0°C. When the temperature of the battery 240 is less than 0°C, the capacity and discharging performance of the battery 240 will be greatly affected. After detecting the temperature of the battery 240, it is first determined whether the temperature of the battery 240 is lower than the sixth temperature threshold.

[0244] For example, the sixth temperature threshold can be -10°C. Alternatively, the sixth temperature threshold can also be -11°C, -10.5°C, -9.5°C, -9°C, etc., which is not limited in the embodiment.

[0245] Step S412: In response to the temperature of the battery 240 being less than the sixth temperature threshold, determining that the working mode of the heating film 250 is the heating mode to charge the battery 240.

[0246] In the embodiment, when the temperature of the battery 240 is less than the sixth temperature threshold, the heating film 250 can be in the heating mode to heat the battery 240, so as to improve the temperature of the battery 240 and improve the discharging performance of the battery 240 in a low-temperature environment.

[0247] It is worth noting that if the temperature of the battery 240 is not less than the sixth temperature threshold, the battery 240 can be normally discharged, and the heating film 250 can not be used to heat the battery 240, thereby saving energy.

[0248] For example, the above step S412 can be implemented in the following manner:

[0249] Step S4121: In response to the temperature of the battery 240 being less than the sixth temperature threshold, electrically connecting the heating film 250 to the battery 240 to enable the battery 240 to supply power to the heating film 250.

[0250] In the embodiment, if the temperature of the battery 240 is less than the sixth temperature threshold, the heating film 250 needs to heat the battery 240. However, at this time, the charger is not connected to the electronic device 200, and no external power supply can supply power to the heating film 250. In this case, the power of the battery 240 can be used to supply power to the heating film 250, so that the heating film 250 can be in the heating mode.

[0251] Optionally, in the electronic device 200, the non-fast charging unit generally has a bidirectional power supply capability. In the embodiment, the reverse current flow (the current flows from the battery 240 to the non-fast charging unit) capability of the non-fast charging unit can be turned on, so that the battery 240 can be electrically connected to the heating film 250 to supply power to the heating film 250.

[0252] Specifically, the non-fast charging unit can be provided with a reverse current flow switch and a forward current flow (the current flows from the non-fast charging unit to the battery 240) switch. When the battery 240 supplies power to the heating film 250, the reverse current flow switch can be turned on and the forward current flow switch can be turned off, so that the current can flow from the battery 240 to the heating film 250 through the non-fast charging unit.

[0253] Further, in the electronic device 200, the non-fast charging charging unit and the heating film 250 can be connected through a USB On-The-Go (OTG) technology, so that the requirement that the current flows from the non-fast charging charging unit to the heating film 250 can be easily met.

[0254] In addition, if the voltage output by the battery 240 is too small, in the embodiment, the output voltage of the battery 240 can be boosted by using the OTG technology, so that the current can be easily transmitted from the battery 240 to the heating film 250.

[0255] It can be understood that in other implementations, a conductive wire and a switch can also be separately arranged to electrically connect the battery 240 and the heating film 250, and the electrical connection manner of the battery 240 and the heating film 250 is not limited in the embodiment.

[0256] Step S4122: Control the current output by the battery 240 to the heating film 250 to be a target current value.

[0257] The target current value can be set according to the heating performance and the current carrying capacity of the heating film 250, and is not limited in the embodiment.

[0258] In the embodiment, when the battery 240 supplies power to the heating film 250, the current output by the battery 240 to the heating film 250 needs to be controlled, so that the current is not too large to cause damage to the heating film 250, and the current is not too small to affect the heating power.

[0259] Step S4123: Control the heating film 250 to heat the battery 240 at a second heating power by using pulse width adjustment PWM.

[0260] The second heating power is less than or equal to the maximum heating power of the heating film 250. In this way, the phenomenon of system overload of the heating film 250 can be avoided, so that the use safety of the heating film 250 can be improved.

[0261] It is worth noting that the specific implementation of controlling the heating power of the heating film 250 by using PWM can refer to the related description in step S3132, which will not be repeated here.

[0262] Step S413: Determine whether the temperature of the battery 240 is heated to be greater than or equal to a first temperature threshold.

[0263] In the embodiment, when the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold, the battery 240 can normally discharge to support the normal operation of the electronic device 200.

[0264] Step S414: in response to the temperature of the battery 240 being heated to be greater than or equal to the first temperature threshold, adjusting the working mode of the heating film 250 to the stop heating mode to stop heating the battery 240.

[0265] When the temperature of the battery 240 is heated to be greater than or equal to the first temperature threshold, it indicates that the temperature of the battery 240 has been in the temperature range required by the safe discharge, and the working mode of the heating film 250 can be adjusted to the stop heating mode to stop heating the battery 240, so as to save energy.

[0266] For example, the electronic device 200 can disconnect the reverse current switch of the non-fast charging charging unit between the heating film 250 and the battery 240, so that the battery 240 cannot supply power to the heating film 250, and the heating film 250 can be in the stop heating mode.

[0267] It is worth noting that if the temperature of the battery 240 is not heated to be greater than or equal to the first temperature threshold, the heating film 250 can continue to heat the battery 240.

[0268] In this embodiment, when the battery 240 is in a low-temperature environment and needs to be charged, the heating film 250 can be used to heat the battery 240, so as to increase the temperature of the battery 240, so that the battery 240 can be normally discharged, and the endurance of the battery 240 in the low-temperature environment is ensured. At the same time, the electronic device 200 can adjust the working mode of the heating film 250 according to the temperature of the battery 240. In this way, the battery 240 can be heated while saving energy resources.

[0269] FIG. 9 is a structural block diagram of a low-temperature protection device for a battery according to an embodiment of the present application.

[0270] Please refer to FIG. 2, FIG. 3 and FIG. 9, the present embodiment further provides a low-temperature protection device 300 for a battery, which comprises a charging module 310, a heating module 320, a temperature detection module 330 and a control module 340.

[0271] The charging module 310 is configured to connect a charger and charge the battery 240. The charging module 310 comprises a charger interface 311 configured to connect the charger. In this way, when the charger is connected to the electronic device 200 through the charging interface, the charging module 310 can charge the battery 240.

[0272] Optionally, the charger interface 311 on the electronic device 200 can include a Type-C interface, a Lightning interface, a Micro USB interface, and a wireless charging interface, etc. In other words, the charger can be connected with the electronic device 200 through a conductive wire, or can be connected with the electronic device 200 through a wireless charging technology, and the embodiment does not limit the charger interface 311 of the electronic device 200.

[0273] Further, the charger can include a fast charging charger and a non-fast charging charger, and the charging mode of the charging module 310 can include a fast charging mode and a non-fast charging mode. When the fast charging charger is connected to the charger interface 311, the charging module 310 can charge the battery 240 in the fast charging mode or the non-fast charging mode. When the non-fast charging charger is connected to the charger interface 311, the charging module 310 can charge the battery 240 in the non-fast charging mode.

[0274] The heating module 320 includes a heating film 250, and the heating film 250 is used to heat the battery 240. The working mode of the heating film 250 includes a heating mode and a stop heating mode.

[0275] It is worth noting that the specific setting position and material of the heating film 250 can refer to the description of FIG. 2 and FIG. 3, which will not be repeated here.

[0276] The temperature detection module 330 is arranged near the battery 240, and is used to detect the temperature of the battery 240.

[0277] For example, the temperature detection module 330 can be a thermocouple. The thermocouple can be arranged on the side of the battery 240 away from the heating film 250, or arranged on the side wall of the battery 240, so as to reduce the influence of the heating film 250 on the thermocouple, and improve the accuracy of temperature detection of the battery 240.

[0278] It is worth noting that in other embodiments, the temperature detection module 330 can also be a thermal resistance and an infrared temperature detector, etc. The embodiment does not limit the temperature detection module 330.

[0279] The control module 340 can include a system on chip (SoC) chip, which can establish a communication connection with the charging module 310, the heating module 320, and the temperature detection module 330, so as to control each module.

[0280] Further, the control module 340 can also include a pulse width modulation (PWM) unit 341. The PWM unit 341 can control the heating power of the heating film 250 through the duty cycle, so as to facilitate the control of the heating power of the heating film 250 by the control module 340.

[0281] For example, the PWM unit 341 can be integrated into the SoC chip or independent of the SoC chip, which is not limited in the embodiment.

[0282] Optionally, the control module 340 can further include a double data rate (DDR), universal flash storage (UFS) / embedded multimedia card (EMMC), so as to provide data support for the control of the SoC chip to each module.

[0283] It is worth noting that the control module 340 can be integrated into the circuit board 260 of the electronic device 200, or can be independent of the circuit board 260 and establish a communication connection with the circuit board 260, and the setting of the control module 340 is not limited in the embodiment.

[0284] In the embodiment, the control module 340 is configured to determine the type of the charger in response to the charger being connected to the charger interface 311, and determine the charging mode and the working mode of the heating film 250 based on the type of the charger and the temperature of the battery 240. In this way, the low-temperature protection device 300 of the battery can determine the type of the charger, and enable the battery 240 to adopt a suitable charging mode under different temperatures and different charger types, so as to improve the charging efficiency and meet the charging needs of the user. Further, the device provided in the embodiment can also enable the heating film 250 to select a suitable working mode under different temperatures and different charger types, so as to save energy resources while achieving low-temperature protection of the battery 240.

[0285] Further, the charging module 310 further includes a non-fast charging unit 312 and a fast charging unit 313, and the non-fast charging unit 312 and the fast charging unit 313 are coupled in parallel between the charger interface 311 and the battery 240. In this way, when the charger is connected to the electronic device 200 through the charger interface 311, the charging module 310 can charge the battery 240 by using the fast charging unit 313 or the non-fast charging unit 312.

[0286] Further, the non-fast charging unit 312 can be a buck (BUCK) charging unit. The BUCK charging unit can reduce the high voltage of the external power supply to the charging voltage required by the battery 240, so as to provide a safe charging voltage and current for the battery 240 and improve the charging efficiency. The fast charging unit 313 can be a charge pump (charger pump) charging unit, and the charger pump charging unit can quickly charge the battery 240 according to the fast charging protocol, so as to improve the charging efficiency.

[0287] The fast charging protocol can include a quick charge (QC) protocol, a power delivery (PD) protocol, a universal fast charging specification (UFCS), a super charge protocol (SCP), etc. It can be understood that, to realize fast charging, the fast charging unit 313 in the electronic device 200 and the charger should support the same fast charging protocol.

[0288] In addition, since the BUCK charging unit has bidirectional conduction capability, when the battery 240 is in a low-temperature environment and is not connected to the charger, the BUCK charging unit can realize electrical connection between the battery 240 and the heating film 250, so that the battery 240 can provide power for the heating film 250, so that the heating film 250 can heat the battery 240 even when the charger is not connected.

[0289] The heating module 320 further includes a first switching unit 321 coupled between the charger interface 311 and the heating film 250. In this way, when the charger is connected to the charger interface 311, the first switching unit 321 can be used to control whether the heating film 250 can be electrically connected to the charger, so as to control whether the heating film 250 can obtain power from the charger, thereby realizing control over the working mode of the heating film 250.

[0290] For example, the first switching unit 321 can be a load switch. In this way, the load switch can be used to control the on-off of the circuit between the charger interface 311 and the heating film 250.

[0291] Specifically, the PWM unit 341 can control the heating power of the heating film 250 by controlling the on-off of the load switch. When the PWM unit 341 outputs a high level, the load switch is in a conduction state, and when the PWM unit 341 outputs a low level, the load switch is in an off state. In this way, by adjusting the duty cycle of the PWM, the conduction state of the heating film 250 and the charger can be adjusted, so as to adjust the heating power of the heating film 250.

[0292] Alternatively, in other embodiments, the first switching unit 321 can also be a metal-oxide-semiconductor field-effect transistor (MOS tube) and an electromagnetic relay, etc. Switching structure, which is not limited in the present embodiment.

[0293] In some embodiments, the low-temperature protection device 300 of the battery can further include a voltage sampling unit 350 and a current sampling unit 360. The voltage sampling unit 350 is configured to detect the actual input voltage of the heating film 250, and the current sampling unit 360 is configured to detect the actual input current of the heating film 250. The control module 340 can be communicatively connected with the voltage sampling unit 350 and the current sampling unit 360, so as to obtain the actual input voltage and the actual input current of the heating film 250, and determine the actual heating power of the heating film 250. In this way, the control of the heating power of the heating film 250 can be facilitated.

[0294] For example, the voltage sampling unit 350 and the current sampling unit 360 can be integrated into the fast charging unit 313. In other words, the actual input voltage and the actual input current of the heating film 250 can be sampled by using the fast charging unit 313.

[0295] Specifically, the voltage sampling unit 350 can be coupled between the heating film 250 and the first switching unit 321, so as to obtain the actual input voltage of the heating film 250. The current sampling unit 360 can include a sampling resistor, which is connected in series with the heating film 250. In this way, the current flowing through the sampling resistor is the same as the actual input current of the heating film 250. The current sampling unit 360 can obtain the actual input current of the heating film 250 by detecting the current flowing through the sampling resistor.

[0296] Alternatively, the voltage sampling unit 350 and the current sampling unit 360 can be analog-to-digital converters (ADCs). It can be understood that, in the present embodiment, the specific forms and sampling manners of the voltage sampling unit 350 and the current sampling unit 360 are not limited.

[0297] In some embodiments, the low-temperature protection device 300 of the battery further includes an overvoltage protection unit 370. The overvoltage protection unit 370 is coupled between the charger interface 311 and the non-fast charging unit 312, between the charger interface 311 and the fast charging unit 313, and between the charger interface 311 and the first switching unit 321. In addition, the overvoltage protection unit 370 is also coupled to the fast charging unit 313. When the fast charging unit 313 detects that the input voltage of the overvoltage protection unit 370 is greater than a safe voltage value, the fast charging unit 313 can control the overvoltage protection unit 370 to disconnect the circuit connection between the charger interface 311 and the non-fast charging unit 312, the fast charging unit 313, and the first switching unit 321, so as to achieve overvoltage protection for the non-fast charging unit 312, the fast charging unit 313, and the first switching unit 321.

[0298] For example, the overvoltage protection unit 370 can include a MOS tube, a control end of the MOS tube is coupled to the fast charging unit 313, a first end of the MOS tube is coupled to the charger interface 311, and a second end of the MOS tube is coupled to the non-fast charging unit 312, the fast charging unit 313, and the first switch unit 321. The control end can refer to a gate of the MOS tube, the first end can refer to a source of the MOS tube, and the second end can refer to a drain of the MOS tube, or the first end can refer to a drain of the MOS tube, and the second end can refer to a source of the MOS tube.

[0299] In some embodiments, the control module 340 is configured to, in response to the type of the charger being a fast charger, control the temperature detection module 330 to detect a temperature of the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being less than a first temperature threshold, control the first switch unit 321 to be in a conducting state, control the charger to supply power to the heating film 250, and control the heating film 250 to heat the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being heated to be greater than or equal to the first temperature threshold and less than a second temperature threshold, control the non-fast charging unit 312 to charge the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being heated to be greater than or equal to the second temperature threshold and less than a third temperature threshold, control the non-fast charging unit 312 to be turned off, and control the fast charging unit 313 to charge the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being heated to be greater than or equal to the third temperature threshold, control the first switch unit 321 to be in a non-conducting state, and adjust the working mode of the heating film 250 to a stop heating mode to stop heating the battery 240; the third temperature threshold is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold.

[0300] In some embodiments, the control module 340 is further configured to control the output power of the charger to be a target output power, and control the charger to supply power to the heating film 250 at the target output power to heat the battery 240.

[0301] In some embodiments, the control module 340 is configured to acquire an actual input voltage detected by the voltage sampling unit 350 and an actual input current detected by the current sampling unit 360, and calculate an actual heating power of the heating film 250 on the battery 240 according to the actual input voltage and the actual input current; the control module 340 is further configured to, in response to the actual heating power meeting a set power range requirement, continue heating; the control module 340 is further configured to, in response to the actual heating power not meeting the set power range requirement, adjust the output voltage of the charger to adjust the actual output power of the charger.

[0302] In some embodiments, the control module 340 is further configured to detect a maximum output power of the charger, compare the maximum output power of the charger with a preset output power, in response to the maximum output power of the charger being greater than or equal to the preset output power, take the preset output power as the target output power, and in response to the maximum output power of the charger being less than the preset output power, take the maximum output power of the charger as the target output power.

[0303] In some embodiments, the control module 340 is further configured to, in response to the temperature of the battery 240 being greater than or equal to a second temperature threshold and less than a third temperature threshold, control the non-fast charging unit 312 to charge the battery 240, and control the first switching unit 321 to be in an off state, so that the heating film 250 is in a stop heating mode.

[0304] In some embodiments, the control module 340 is further configured to, in response to the temperature of the battery 240 being greater than or equal to the third temperature threshold, control the fast charging unit 313 to charge the battery 240, and control the first switching unit 321 to be in an off state, so that the heating film 250 is in a stop heating mode.

[0305] In some embodiments, the control module 340 is configured to, in response to the type of the charger being a non-fast charging charger, control the temperature detection module 330 to detect the temperature of the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being less than a first temperature threshold, control the first switching unit 321 to be in a conductive state, so that the charger supplies power to the heating film 250, and control the heating film 250 to heat the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being heated to be greater than or equal to the first temperature threshold and less than a fifth temperature threshold, control the non-fast charging unit 312 to charge the battery 240; the control module 340 is further configured to, in response to the temperature of the battery 240 being heated to be greater than or equal to the fifth temperature threshold, control the first switching unit 321 to be in an off state, and adjust the working mode of the heating film 250 to a stop heating mode to stop heating the battery 240; wherein the fifth temperature threshold is greater than the first temperature threshold.

[0306] In some embodiments, the pulse width modulation (PWM) unit 341 is configured to control the conduction and non-conduction of the first switching unit 321, so that the heating film 250 heats the battery 240 at a first heating power; wherein the first heating power is less than the maximum output power of the non-fast charging charger.

[0307] In some embodiments, the control module 340 is further configured to, in response to the temperature of the battery 240 being greater than or equal to the first temperature threshold, control the non-fast charging unit 312 to charge the battery 240, and control the first switching unit 321 to be in an off state, so that the heating film 250 is in a stop heating mode.

[0308] In some embodiments, when the charger is not connected to the charger interface 311, the control module 340 is configured to control the temperature detection module 330 to detect the temperature of the battery 240 in response to the display screen being turned on and the first application being started; the control module 340 is further configured to control the first switch unit 321 and the non-fast charging unit 312 to be in a conductive state in response to the temperature of the battery 240 being less than a sixth temperature threshold, so that the battery 240 supplies power to the heating film 250 through the non-fast charging unit 312, and the heating film 250 heats the battery 240; the control module 340 is further configured to control the first switch unit 321 and the non-fast charging unit 312 to be in a non-conductive state in response to the temperature of the battery 240 being heated to be greater than or equal to the first temperature threshold, so that the working mode of the heating film 250 is adjusted to a stop heating mode to stop heating the battery 240; wherein the sixth temperature threshold is less than the first temperature threshold, and the sixth temperature threshold is less than 0℃.

[0309] In some embodiments, the control module 340 is further configured to control the battery 240 to supply power to the heating film 250 at a target current value; the control module 340 comprises a pulse width modulation (PWM) unit 341; the pulse width modulation (PWM) unit 341 is configured to control the conduction and non-conduction of the first switch unit 321, so that the heating film 250 heats the battery 240 at a second heating power; wherein the second heating power is less than or equal to the maximum heating power of the heating film 250.

[0310] As can be seen from the above description, the low-temperature protection device 300 for the battery can be used to implement the low-temperature protection method for the battery 240 described above. The specific description of the low-temperature protection device 300 for the battery used to implement the low-temperature protection method for the battery 240 can be combined with the related description of the low-temperature protection method for the battery 240, which will not be repeated here.

[0311] The embodiments of the present application also provide an electronic device 200 comprising the battery 240 and the low-temperature protection device 300 for the battery as described above. The low-temperature protection device 300 for the battery can heat the battery 240 in a low-temperature environment to achieve fast charging of the battery 240 in the low-temperature environment. At the same time, when the battery 240 is used in a low-temperature environment, the discharge performance of the battery 240 in the low-temperature environment can be improved by heating the battery 240, and the endurance time of the battery 240 can be prolonged. In addition, the thickness of the heating film 250 in the low-temperature protection device 300 for the battery is less than 0.1 mm, which facilitates the thin and light design of the electronic device 200.

[0312] Specifically, the arrangement of the battery 240 in the electronic device 200 and the low-temperature protection device 300 for the battery can refer to the description in combination with FIG. 2, FIG. 3 and FIG. 9, which will not be repeated here.

[0313] FIG. 10 is a structural schematic diagram of a chip system according to an embodiment of the present application.

[0314] As shown in FIG. 10, the chip system 400, for example, a SoC, according to an embodiment of the present application includes at least one processor 401 and at least one interface circuit 402. The processor 401 and the interface circuit 402 can be interconnected by a wire. For example, the interface circuit 402 can be used to receive a signal from another device, for example, a memory of an electronic device. For another example, the interface circuit 402 can be used to send a signal to another device, for example, the processor 401 or a touch screen of the electronic device. Illustratively, the interface circuit 402 can read an instruction stored in the memory and send the instruction to the processor 401. When the instruction is executed by the processor 401, the electronic device can perform various steps in the above-described embodiments. Of course, the chip system can also include other discrete devices, which are not limited in the embodiments of the present application.

[0315] The embodiments of the present application also provide a computer storage medium including computer instructions, when the computer instructions are executed on the above-described electronic device, the electronic device performs various functions or steps performed by the electronic device in the above-described method embodiments.

[0316] The embodiments of the present application also provide a computer program product, when the computer program product is executed on a computer, the computer performs various functions or steps performed by the electronic device in the above-described method embodiments.

[0317] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above-described functions.

[0318] It is easy to understand that, on the basis of several embodiments provided by the present application, those skilled in the art can combine, split, recombine, etc. the embodiments of the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0319] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other manners. For example, the apparatus embodiments described above are merely illustrative, for example, the division of the modules or units is merely a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another apparatus, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, apparatuses or units, and can be electrical, mechanical or other forms.

[0320] The units described as separate components can or can not be physically separate, and the components shown as units can be one physical unit or multiple physical units, that is, can be located in one place or can be distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0321] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0322] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing an apparatus (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the method of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes. It should be noted that, those skilled in the art, after considering the specification and practicing the disclosed application, will easily think of other embodiments of the present application. The present application is intended to cover any variations, uses or adaptations of the present application that follow the general principles of the present application and include common knowledge or conventional technical means in the technical field of the present application that are not disclosed in the present application. The specification and examples are merely exemplary, and the true scope of the present application is indicated by the claims.

[0323] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A method for low-temperature protection of a battery, characterized in that, Applied to electronic devices, the method includes: In response to the charger being connected to the electronic device, the type of the charger is determined; The charging mode and the operating mode of the heating film are determined based on the type of the charger and the temperature of the battery. The charger type includes fast charger and non-fast charger, the charging mode includes fast charging mode and non-fast charging mode, the heating film is used to heat the battery, and the operating mode includes heating mode and heating stop mode.

2. The low-temperature protection method for a battery according to claim 1, characterized in that, The determination of the charging mode and the operating mode of the heating film based on the type of the charger and the temperature of the battery includes: In response to the charger being a fast charger, the temperature of the battery is detected; In response to the battery temperature being lower than a first temperature threshold, the operating mode of the heating film is determined to be the heating mode, so as to heat the battery; In response to the battery temperature being heated to a level greater than or equal to the first temperature threshold and less than the second temperature threshold, the battery is charged in the non-fast charging mode. In response to the battery temperature being heated to a level greater than or equal to the second temperature threshold and less than the third temperature threshold, the non-fast charging mode is switched to the fast charging mode to charge the battery. In response to the battery temperature heating up to a level greater than or equal to the third temperature threshold, the operating mode of the heating film is adjusted to the stop heating mode to stop heating the battery; Wherein, the third temperature threshold is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold.

3. The low-temperature protection method for a battery according to claim 2, characterized in that, The step of determining the operating mode of the heating film as the heating mode to heat the battery in response to the battery temperature being lower than a first temperature threshold includes: In response to the battery temperature being lower than the first temperature threshold, the output power of the charger is adjusted to the target output power; The heating film is electrically connected to the charger, so that the charger supplies power to the heating film at the target output power to heat the battery.

4. The low-temperature protection method for a battery according to claim 3, characterized in that, After electrically connecting the heating film to the charger, so that the charger supplies power to the heating film at the target output power to heat the battery, the method further includes: The actual heating power of the heating film on the battery is detected; In response to the actual heating power meeting the set power range requirement, heating continues; In response to the actual heating power not meeting the set power range requirement, the output voltage of the charger is adjusted to adjust the actual output power of the charger.

5. The low-temperature protection method for a battery according to claim 3, characterized in that, The method for determining the target output power includes: Detect the maximum output power of the charger; Compare the charger's maximum output power with the preset output power; In response to the maximum output power of the charger being greater than or equal to the preset output power, the preset output power is used as the target output power; In response to the maximum output power of the charger being less than the preset output power, the maximum output power of the charger is taken as the target output power.

6. The low-temperature protection method for a battery according to claim 2, characterized in that, After adjusting the operating mode of the heating film to the stop heating mode in response to the battery temperature heating to a level greater than or equal to the third temperature threshold, to stop heating the battery, the method further includes: In response to the temperature of the battery dropping below a fourth temperature threshold, the operating mode of the heating film is determined to be the heating mode to heat the battery; Wherein, the fourth temperature threshold is less than the third temperature threshold, and the fourth temperature threshold is greater than the second temperature threshold.

7. The low-temperature protection method for a battery according to claim 2, characterized in that, The method of determining the charging mode and the operating mode of the heating film based on the type of the charger and the temperature of the battery also includes: In response to the battery temperature being greater than or equal to the second temperature threshold and less than the third temperature threshold, the battery is charged in the non-fast charging mode, and the heating film is placed in the stop heating mode.

8. The low-temperature protection method for a battery according to claim 2, characterized in that, The method of determining the charging mode and the operating mode of the heating film based on the type of the charger and the temperature of the battery also includes: In response to the battery temperature being greater than or equal to the third temperature threshold, the battery is charged in the fast charging mode, and the heating film is placed in the stop heating mode.

9. The low-temperature protection method for a battery according to claim 1, characterized in that, The determination of the charging mode and the operating mode of the heating film based on the type of the charger and the temperature of the battery includes: In response to the charger being a non-fast charger, the temperature of the battery is detected; In response to the battery temperature being lower than a first temperature threshold, the operating mode of the heating film is determined to be the heating mode, so as to heat the battery; In response to the battery temperature being heated to a level greater than or equal to the first temperature threshold and less than the fifth temperature threshold, the battery is charged in the non-fast charging mode. In response to the battery temperature being heated to a level greater than or equal to the fifth temperature threshold, the operating mode of the heating film is adjusted to the stop heating mode to stop heating the battery; The fifth temperature threshold is greater than the first temperature threshold.

10. The low-temperature protection method for a battery according to claim 9, characterized in that, The step of determining the operating mode of the heating film as the heating mode to heat the battery in response to the battery temperature being lower than a first temperature threshold includes: In response to the battery temperature being lower than the first temperature threshold, the heating film is electrically connected to the charger, so that the charger supplies power to the heating film; The heating film is controlled by pulse width modulation (PWM) to heat the battery with a first heating power; Wherein, the first heating power is less than the maximum output power of the non-fast charger.

11. The low-temperature protection method for a battery according to claim 9, characterized in that, The method of determining the charging mode and the operating mode of the heating film based on the type of the charger and the temperature of the battery also includes: In response to the battery temperature being greater than or equal to the first temperature threshold, the battery is charged in the non-fast charging mode, and the heating film is placed in the stop heating mode.

12. The low-temperature protection method for a battery according to claim 1, characterized in that, Also includes: When the charger is not connected to the electronic device, the temperature of the battery is detected in response to the display screen turning on and the first application being launched. In response to the battery temperature being lower than a sixth temperature threshold, the operating mode of the heating film is determined to be the heating mode to heat the battery; In response to the battery temperature being heated to a level greater than or equal to a first temperature threshold, the operating mode of the heating film is adjusted to the stop heating mode to stop heating the battery; Wherein, the sixth temperature threshold is less than the first temperature threshold, and the sixth temperature threshold is less than 0°C.

13. The low-temperature protection method for a battery according to claim 12, characterized in that, The step of determining the operating mode of the heating film as the heating mode to heat the battery in response to the battery temperature being lower than a sixth temperature threshold includes: In response to the battery temperature being lower than the sixth temperature threshold, the heating film is electrically connected to the battery, so that the battery supplies power to the heating film; The current output from the battery to the heating film is controlled to a target current value; The heating film is controlled by pulse width modulation (PWM) to heat the battery with a second heating power; Wherein, the second heating power is less than or equal to the maximum heating power of the heating film.

14. A low-temperature protection device for a battery, characterized in that, include: A charging module, the charging module including a charger interface for connecting a charger; A heating module, comprising a heating film for heating the battery, wherein the heating film has a working mode including a heating mode and a stop heating mode; A temperature detection module is installed in the battery to detect the temperature of the battery; The control module is configured to, in response to the charger being connected to the charger interface, determine the type of the charger, and determine the charging mode and the operating mode of the heating film based on the type of the charger and the temperature of the battery. The charger type includes a fast charger and a non-fast charger, and the charging mode includes charging the battery using the fast charging unit or the non-fast charging unit.

15. The low-temperature protection device for a battery according to claim 14, characterized in that, The charging module also includes a fast charging unit and a non-fast charging unit; One end of the fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; One end of the non-fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; The heating module further includes a first switching unit, which is coupled between the charger interface and the heating film; The control module is configured to control the temperature detection module to detect the temperature of the battery in response to the charger being of the type of fast charger. The control module is also configured to, in response to the battery temperature being lower than a first temperature threshold, control the first switching unit to be in a conducting state, so that the charger supplies power to the heating film and controls the heating film to heat the battery; The control module is also configured to control the non-fast charging unit to charge the battery in response to the battery temperature being heated to a level greater than or equal to the first temperature threshold and less than the second temperature threshold. The control module is also configured to shut down the non-fast charging unit and control the fast charging unit to charge the battery in response to the battery temperature being heated to a level greater than or equal to the second temperature threshold and less than the third temperature threshold. The control module is also configured to, in response to the battery temperature being heated to a level greater than or equal to the third temperature threshold, control the first switch unit to be in an off state, and adjust the operating mode of the heating film to the stop heating mode to stop heating the battery; Wherein, the third temperature threshold is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold.

16. The low-temperature protection device for a battery according to claim 15, characterized in that, The control module is also configured to control the output power of the charger to a target output power, so that the charger supplies power to the heating film at the target output power to heat the battery.

17. The low-temperature protection device for a battery according to claim 16, characterized in that, Also includes: Voltage sampling unit and current sampling unit; The voltage sampling unit is used to detect the actual input voltage of the heating film; The current sampling unit is used to detect the actual input current of the heating film; The control module is configured to acquire the actual input voltage detected by the voltage sampling unit and the actual input current detected by the current sampling unit, and calculate the actual heating power of the heating film on the battery based on the actual input voltage and the actual input current; The control module is also configured to continue heating in response to the actual heating power meeting the set power range requirement. The control module is also configured to adjust the output voltage of the charger in response to the actual heating power not meeting the set power range requirement, so as to adjust the actual output power of the charger.

18. The low-temperature protection device for a battery according to claim 16, characterized in that, The control module is further configured to detect the maximum output power of the charger, compare the maximum output power of the charger with a preset output power, and, in response to the maximum output power of the charger being greater than or equal to the preset output power, use the preset output power as the target output power; and in response to the maximum output power of the charger being less than the preset output power, use the maximum output power of the charger as the target output power.

19. The low-temperature protection device for a battery according to claim 15, characterized in that, The control module is also configured to, in response to the battery temperature being greater than or equal to the second temperature threshold and less than the third temperature threshold, control the non-fast charging unit to charge the battery, control the first switching unit to be in an off state, and put the heating film in the stop heating mode.

20. The low-temperature protection device for a battery according to claim 15, characterized in that, The control module is also configured to control the fast charging unit to charge the battery in response to the battery temperature being greater than or equal to the third temperature threshold, and to control the first switching unit to be in the off state, so that the heating film is in the stop heating mode.

21. The low-temperature protection device for a battery according to claim 14, characterized in that, The charging module also includes a non-fast charging unit; One end of the non-fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; The heating module further includes a first switching unit, which is coupled between the charger interface and the heating film; The control module is configured to control the temperature detection module to detect the temperature of the battery in response to the charger being a non-fast charger. The control module is also configured to, in response to the battery temperature being lower than a first temperature threshold, control the first switching unit to be in a conducting state, so that the charger supplies power to the heating film and controls the heating film to heat the battery; The control module is also configured to control the non-fast charging unit to charge the battery in response to the battery temperature being heated to a level greater than or equal to the first temperature threshold and less than the fifth temperature threshold. The control module is also configured to, in response to the battery temperature being heated to a level greater than or equal to a fifth temperature threshold, control the first switching unit to be in an off state, and adjust the operating mode of the heating film to the stop heating mode to stop heating the battery; The fifth temperature threshold is greater than the first temperature threshold.

22. The low-temperature protection device for a battery according to claim 21, characterized in that, The control module includes a pulse width modulation (PWM) unit; The pulse width modulation (PWM) unit is configured to control the on and off of the first switching unit so that the heating film heats the battery with a first heating power; Wherein, the first heating power is less than the maximum output power of the non-fast charger.

23. The low-temperature protection device for a battery according to claim 21, characterized in that, The control module is also configured to, in response to the battery temperature being greater than or equal to the first temperature threshold, control the non-fast charging unit to charge the battery, control the first switching unit to be in an off state, and put the heating film in the stop heating mode.

24. The low-temperature protection device for a battery according to claim 14, characterized in that, The charging module also includes a non-fast charging unit; One end of the non-fast charging unit is coupled to the charger interface, and the other end is coupled to the battery; The heating module further includes a first switching unit, which is coupled to the heating film between the charger interface and the heating film. When the charger is not connected to the charger interface, the control module is configured to control the temperature detection module to detect the temperature of the battery in response to the display screen turning on and launching the first application; The control module is also configured to control the first switching unit and the non-fast charging unit to be in a conducting state in response to the battery temperature being less than a sixth temperature threshold, so that the battery supplies power to the heating film through the non-fast charging unit and controls the heating film to heat the battery; The control module is also configured to, in response to the battery temperature being heated to a level greater than or equal to a first temperature threshold, control the first switching unit and the non-fast charging unit to be in a disconnected state, and adjust the working mode of the heating film to the stop heating mode to stop heating the battery; Wherein, the sixth temperature threshold is less than the first temperature threshold, and the sixth temperature threshold is less than 0°C.

25. The low-temperature protection device for a battery according to claim 24, characterized in that, The control module is also configured to control the battery to supply power to the heating film at a target current value; The control module includes a pulse width modulation (PWM) unit; The pulse width modulation (PWM) unit is configured to control the on and off of the first switching unit so that the heating film heats the battery with a second heating power. Wherein, the second heating power is less than or equal to the maximum heating power of the heating film.

26. The low-temperature protection device for a battery according to claim 14, characterized in that, The thickness of the heating film is less than or equal to 0.1 mm.

27. An electronic device, characterized in that, include: The battery and the low-temperature protection device for the battery as described in any one of claims 14-26, The low-temperature protection device of the battery is used to protect the battery from low temperatures.

28. A computer-readable storage medium, characterized in that, Includes computer instructions that, when executed on an electronic device, cause the electronic device to perform the low-temperature protection method for a battery as described in any one of claims 1-13.

29. A computer program product, characterized in that, When the computer program product is run on a computer, the computer performs the low-temperature protection method for the battery as described in any one of claims 1-13.

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