WO2023045813A1

WO2023045813A1 - Battery heating apparatus and electronic device

Info

Publication number: WO2023045813A1
Application number: PCT/CN2022/118661
Authority: WO
Inventors: 袁兵; 于文超; 崔瑞; 谭荣龙; 邱实
Original assignee: 华为技术有限公司
Priority date: 2021-09-27
Filing date: 2022-09-14
Publication date: 2023-03-30
Also published as: CN115882116A

Abstract

The present application relates to a battery heating apparatus and an electronic device. The battery heating apparatus is applied to an electronic device, and the battery heating apparatus comprises a processor, a battery, a heat emission control module and a heat-emitting module, wherein the battery is adjacent to the heat-emitting module; the processor is used for controlling the battery to generate a direct-current first voltage signal when temperature information of the battery is lower than a first threshold value; the heat emission control module is used for generating an alternating-current second voltage signal according to the first voltage signal; and the heat-emitting module is used for generating heat according to the second voltage signal and providing same to the battery. According to the battery heating apparatus and the electronic device in the embodiments of the present application, the flexibility of the mode of heating a battery in a low-temperature environment can be improved, such that the battery can be heated regardless of when the electronic device is in a charging scenario or in a non-charging scenario.

Description

Battery heaters and electronics

This application claims priority to a Chinese patent application with application number 202111135513.X and application title "Battery Heating Device and Electronic Equipment" filed with the China Patent Office on September 27, 2021, the entire contents of which are hereby incorporated by reference into this application middle.

technical field

The present application relates to the field of batteries, in particular to a battery heating device and electronic equipment.

Background technique

When the ambient temperature is low, the battery temperature of mobile phones and other electronic devices also drops, making the battery activity worse. If you need to use certain functions of electronic devices at this time, such as making calls, chatting, watching videos, etc., electronic The device may respond slowly or even unresponsively, resulting in a poor user experience. Therefore, in a low-temperature environment, the battery of the electronic device needs to be heated to ensure the real-time response of the electronic device to user operations. The battery heating scheme proposed in the prior art usually needs to be executed when the electronic device is in the charging scene. In some non-charging scenes that lack charging facilities or are difficult to obtain charging facilities, the conditions for the electronic device in the charging scene are not met, making it impossible to Batteries of electronic devices are heated based on the prior art, so the battery heating solutions of the prior art cannot flexibly adapt to charging scenarios and non-charging scenarios.

In view of this, how to improve the flexibility of the way of heating the battery in a low-temperature environment, so that the battery can be heated when the electronic device is in a charging scene or a non-charging scene, has become a research hotspot in this field.

Contents of the invention

In view of this, a battery heating device and electronic equipment are proposed. According to the battery heating device and electronic equipment of the embodiments of the present application, the flexibility of the battery heating method can be improved when the electronic equipment is in a low temperature environment, so that the electronic equipment is in The battery can be heated in both charging and non-charging scenarios.

In the first aspect, the embodiment of the present application provides a battery heating device, the battery heating device is applied to electronic equipment, the battery heating device includes: a processor, a battery, a heating control module and a heating module, the battery and The heating module is adjacent, and the processor is used to control the battery to generate a first DC voltage signal when the temperature information of the battery is lower than a first threshold; the heating control module is used to control the battery according to the first voltage signal A second AC voltage signal is generated, and the heating module is used to generate heat according to the second voltage signal and provide it to the battery.

According to the battery heating device of the embodiment of the present application, when the temperature information of the battery is lower than the first threshold, the processor controls the battery to generate a first DC voltage signal, and the heating control module generates a second AC voltage signal according to the first voltage signal, The heating module generates heat according to the second voltage signal and provides it to the battery, so that the temperature of the battery is increased. The battery is adjacent to the heating module, which can ensure the heat transfer efficiency and obtain a better heating effect. According to the battery heating device of the embodiment of the present application, as long as the temperature information of the battery is lower than the first threshold, the battery can be heated, so that the battery can be heated when the electronic device is in a charging scene or a non-charging scene, and the electronic device can be improved. Flexibility in how the battery is heated when the device is in a cold environment.

According to the first aspect, in the first possible implementation manner of the battery heating device, the heating module includes a coil and a capacitor connected in series, and the second voltage signal has a voltage such that the impedance of the heating module is less than a second threshold frequency and duty cycle.

By setting the coil and the capacitor in series, the common impedance of the coil and the capacitor is related to the frequency and duty cycle of the AC signal flowing through the coil and the capacitor, and the second voltage signal has a frequency and a frequency at which the impedance of the heating module is smaller than the second threshold When the duty cycle is high, the coil generates a larger current, which in turn makes the coil heat faster, which can improve the heating efficiency.

According to the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner of the battery heating device, the heating control module includes a first voltage converter and a second voltage converter , the first voltage converter is used to generate a DC third voltage signal according to the first voltage signal, the voltage value of the third voltage signal is greater than the voltage value of the first voltage signal; the second voltage conversion The device is used to generate the second voltage signal according to the third voltage signal.

The first voltage signal is the signal directly output by the battery. First, the voltage value is usually low, usually between 3.5-4.4V. The second voltage signal directly used to obtain the AC will make the voltage value of the second voltage signal lower. It is not conducive to the heating module to obtain a larger current, that is, it is not conducive to ensuring a higher heating efficiency. Second, the voltage value may not be stable enough, and the second voltage signal directly used to obtain the AC will cause the voltage value of the second voltage signal to fluctuate, which is not conducive to the stable heating effect of the heating module. By setting the first voltage converter, the stable third voltage signal with a higher voltage value is output to the heating module, which can ensure that the heating module has higher heating efficiency and stable heating effect.

According to the second possible implementation manner of the first aspect, in the third possible implementation manner of the battery heating device, the second voltage converter includes a first field effect transistor, a second field effect transistor, a second Three field effect transistors and a fourth field effect transistor, the first pole of the first field effect transistor and the second pole of the second field effect transistor respectively receive the third voltage signal, and the first pole of the first field effect transistor The second pole is connected to the second pole of the fourth field effect transistor and one end of the heating module, and the first pole of the second field effect transistor is connected to the first pole of the third field effect transistor and the heating module. At the other end of the module, the second pole of the third field effect transistor and the first pole of the fourth field effect transistor are respectively connected to the ground GND, and the first field effect transistor, the second field effect transistor, and the The third field effect transistor and the third electrode of the fourth field effect transistor respectively receive a first control signal, and the first control signal is used to control the first field effect transistor, the second field effect transistor, The first pole and the second pole of the third field effect transistor and the fourth field effect transistor are turned on or off, and the first control signal is controlled by generated by the processor.

According to the second or third possible implementation manner of the first aspect, in a fourth possible implementation manner of the battery heating device, the second voltage converter is also used to receive the first control signal, so The first control signal is generated by the processor when the temperature information is lower than a first threshold, and the generating the second voltage signal according to the third voltage signal includes: according to the third voltage signal and The first control signal generates the second voltage signal.

The first control signal is generated when the temperature information is lower than the first threshold, so when the condition that the temperature information is lower than the first threshold is not met, the first control signal will not be generated, so that the second voltage converter will not be subject to the first control The effect of the signal can perform the original function.

According to any one of the second to fourth possible implementations of the first aspect, in a fifth possible implementation of the battery heating device, the first control signal causes the When the first pole and the second pole of the first field effect transistor and the third field effect transistor are turned on or off, the first pole of the second field effect transistor and the fourth field effect transistor The first pole and the second pole are turned off or turned on, the first field effect transistor and the third field effect transistor are turned on between the first pole and the second pole, and the second field effect transistor and the third field effect transistor are connected to each other. When the first pole and the second pole of the fourth field effect transistor are turned off, the voltage value of one end of the heating module is equal to the voltage value of the third voltage signal, and the voltage value of the other end of the heating module is Equal to 0; conduction between the first pole and the second pole of the second field effect transistor and the fourth field effect transistor, the first pole of the first field effect transistor and the third field effect transistor When it is closed with the second pole, the voltage value at one end of the heating module is equal to 0, and the voltage value at the other end of the heating module is equal to the voltage value of the third voltage signal.

In this way, according to the third voltage signal and the first control signal, a combination of two voltage values can be generated at both ends of the heating module, making it possible for the second voltage converter to generate an AC second voltage signal.

According to any one of the second to fifth possible implementations of the first aspect, in a sixth possible implementation of the battery heating device, the first control signal causes the Between the first pole and the second pole of the first field effect transistor and the third field effect transistor and between the first pole and the second pole of the second field effect transistor and the fourth field effect transistor alternately conducting to generate the second voltage signal.

In this way, the combination of the two voltage values appears alternately at both ends of the heating module, so as to realize the generation of the second voltage signal.

According to any one of the second to sixth possible implementations of the first aspect, in a seventh possible implementation of the battery heating device, the first control signal is wave, the frequency and duty cycle of the first control signal are equal to the frequency and duty cycle of the second voltage signal.

The frequency and duty cycle of the first control signal are equal to the frequency and duty cycle of the second voltage signal, so that by directly adjusting the frequency and duty cycle of the first control signal, the frequency and duty cycle of the second voltage signal can be adjusted indirectly Ratio, to obtain the second voltage signal whose frequency and duty cycle meet the requirements.

According to any one of the first to seventh possible implementations of the first aspect, in an eighth possible implementation of the battery heating device, the coil includes a wireless At least one of a charging coil or a near field communication coil.

In this way, only one of the wireless charging coil and the near-field communication coil is included in the electronic device to generate heat to heat the battery, which can improve the structural flexibility of the battery heating device.

According to the first aspect, and any possible implementation manner of the above first aspect, in a ninth possible implementation manner of the battery heating device, the heating control module and the heating module are wirelessly charged in electronic equipment circuit implementation.

When heating the battery based on the battery heating device, there is no need to change the components of the electronic equipment, only to generate corresponding signals, and the cost and area of the circuit will not be increased.

In a second aspect, an embodiment of the present application provides an electronic device, the electronic device includes the battery heating device described in any one of the above items.

These and other aspects of the present application will be made more apparent in the following description of the embodiment(s).

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the specification, serve to explain the principles of the application.

Fig. 1 shows an exemplary structural diagram of an electronic device according to an embodiment of the present application.

Fig. 2 shows an exemplary structural diagram of the heating control module 103 according to an embodiment of the present application.

FIG. 3 shows an exemplary structural diagram of the second voltage converter 1032 according to the embodiment of the present application.

FIG. 4 shows an exemplary schematic diagram of voltage values output to both ends of the heating module 104 by the second voltage converter 1032 within a period of time according to an embodiment of the present application.

Fig. 5 shows an exemplary structural diagram of the heating module 104 according to the embodiment of the present application.

FIG. 6 shows an exemplary schematic diagram of a battery heating method according to an embodiment of the present application.

FIG. 7 shows an exemplary structural diagram of a battery heating device 70 according to an embodiment of the present application.

Fig. 8 shows a schematic structural diagram of an exemplary electronic device 7 according to an embodiment of the present application.

Detailed ways

Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

In addition, in order to better illustrate the present application, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present application may be practiced without certain of the specific details. In some instances, methods, means, components and circuits well known to those skilled in the art have not been described in detail in order to highlight the gist of the present application.

The battery heating scheme proposed in the prior art is introduced below.

A battery heating solution proposed in the prior art is, under the condition that the electronic device is connected to a charger, by increasing the processor (central processing unit (CPU), graphics processing unit (GPU) of the electronic device ) etc.) power consumption discharge to heat the battery. However, this solution is only applicable to charging scenarios, and because the processor is usually installed on the motherboard, the heat needs to be provided to the motherboard first and then to the battery, which has a certain impact on the heating effect and heating efficiency of the battery.

Another battery heating solution proposed in the prior art is to add an external circuit dedicated to supplying current to the coil of the electronic device on the electronic device. Under the condition that the electronic device is connected to a charger, the external circuit generates current to flow through the coil Make the coil heat first, and then heat the battery through the coil. The coil is usually set near the battery, and the heat can be directly transferred to the battery, which can solve the above problem of low heating efficiency and improve the heating effect and heating efficiency. However, this solution still does not solve the problem that it is only applicable to charging scenarios, and the external circuit increases the circuit cost and circuit area of the electronic device to a certain extent.

To sum up, the battery heating solution in the prior art cannot simultaneously meet the requirement of heating the battery when the electronic device is in a charging scene or a non-charging scene.

In order to solve the above technical problems, this application proposes a battery heating device and electronic equipment. According to the battery heating device and electronic equipment of the embodiment of the application, the flexibility of the battery heating method can be improved when the battery is in a low temperature environment, so that The battery can be heated when the electronic device is in a charging scene or a non-charging scene.

Electronic devices can include cell phones, foldable electronic devices, tablet computers, desktop computers, laptop computers, handheld computers, notebook computers, ultra-mobile personal computers (UMPC), netbooks, cellular phones, personal digital Assistant (personal digital assistant, PDA), augmented reality (augmented reality, AR) equipment, virtual reality (virtual reality, VR) equipment, artificial intelligence (artificial intelligence, AI) equipment, wearable equipment, vehicle equipment, smart home equipment , or at least one of smart city equipment. The embodiment of the present application does not specifically limit the specific type of the electronic device.

As shown in Figure 1, the electronic device according to the embodiment of the present application may include: a processor 101, a battery 102, a heating control module 103 and a heating module 104, the processor 101 may be connected to the battery 102, and the battery 102 may be connected to the heating control module 103, The heating control module 103 can be connected to the heating module 104 . An exemplary method for heating a battery by an electronic device according to an embodiment of the present application will be described below with reference to FIG. 1 .

In a possible implementation, the electronic device according to the embodiment of the present application may further include a temperature sensor (not shown), such as a negative temperature coefficient (negative temperature coefficient, NTC) thermistor, etc., for detecting the temperature of the battery. temperature. The trigger condition for the temperature sensor to detect the battery temperature may be that the electronic device detects that the screen is awakened, or that the electronic device detects an action of unlocking by the user, etc., which is not limited in this application. After the screen is awakened or the user unlocks the electronic device, the temperature sensor can detect the battery temperature at a certain frequency and generate a signal P0 indicating temperature information while the user is using the electronic device.

The processor 101 may include one or more processing units, for example: the processor 101 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

In a possible implementation manner, the processor 101 may periodically acquire a signal P0 generated by the temperature sensor, and determine the temperature of the battery according to the signal P0 from the temperature sensor, thereby determining whether the electronic device is in a low-temperature environment. For example, the relationship between the temperature value of the battery and a preset first temperature threshold (eg -5° C.) can be judged, and when the temperature value of the battery is lower than the preset first temperature threshold, it can be determined that the electronic device is in a low-temperature environment.

In a possible implementation, the temperature sensor can also be connected to a comparison module (not shown), and when it is judged that the temperature is lower than the first temperature threshold (for example, -5°C), a signal P0 indicating temperature information is generated and reported to the processor . The processor 101 may directly determine that the electronic device is in a low-temperature environment according to the signal P0 from the temperature sensor.

Those skilled in the art should understand that the value of the first temperature threshold may be determined according to an actual application scenario of the electronic device, and the present application does not limit the specific value of the first temperature threshold.

When it is determined that the electronic device is in a low-temperature environment, the processor 101 may output a signal P1 to the battery 102 . According to the signal P1 from the processor, the battery 102 can output a signal P2 to the heating control module 103 . Wherein, the signal P2 may be a direct current signal. For example, the voltage value of the signal P2 can be between 3.5-4.4V. The voltage value of the signal P2 may also be equal to other values, and the application does not limit the specific value of the voltage value of the signal P2.

The heating control module 103 can generate a signal P3 according to the signal P2 and output it to the heating module 104 . Wherein, the signal P3 may be an alternating current signal. For an exemplary implementation thereof, reference may be made to the relevant descriptions in FIGS. 2-4 below.

The heating module 104 can generate current according to the signal P3, and the current makes the heating module 104 generate heat. For an exemplary implementation manner thereof, reference may be made to the related description of FIG. 5 below. The heating module 104 can be arranged adjacent to the battery 102 so that heat can be directly transferred to the battery 102 . Optionally, a heat conduction component (not shown) may also be provided in contact with the heating module 104 and the battery 102 respectively, and the heat conduction component may include a graphite sheet, a front case assembly, etc., so that heat can be transferred through the heat conduction component. Optionally, the heat conduction component may also be attached to the area where the processor 101 is located, so as to transfer the heat generated by the processor 101 to the battery 102 .

The heat provided by the heating module 104 can increase the temperature of the battery. Until the processor 101 determines according to the signal from the temperature sensor that the temperature of the electronic device meets the normal working requirement, it may stop outputting the signal P1 to the battery 102 . Wherein, the temperature meeting the normal working requirement may be a temperature greater than or equal to the second temperature threshold (for example, 5°C). In this case, the battery 102 stops outputting the signal P2 to the heating control module 103, and the heating control module 103 stops outputting the signal P3. to the heating module 104. Since the signal P3 is not received, the heating module 104 will stop heating. Those skilled in the art should understand that the second temperature threshold can be determined according to the actual application scenario of the electronic device, as long as it is greater than the first temperature threshold, and the present application does not limit the specific value of the second temperature threshold.

An exemplary structure of the heating control module 103 is introduced below. Fig. 2 shows an exemplary structural diagram of the heating control module 103 according to an embodiment of the present application.

As shown in FIG. 2, the heating control module 103 according to the embodiment of the present application may include a first voltage converter 1031 and a second voltage converter 1032, wherein the first voltage converter 1031 may be connected to the second voltage converter 1032, and the second voltage converter 1032 may be connected to the second voltage converter 1032. A voltage converter 1031 is also connected to the battery 102 , and a second voltage converter 1032 is also connected to the heating module 104 .

The first voltage converter 1031 may be a DC-DC converter for receiving a signal P2 from the battery 102 and outputting a signal P4 to the second voltage converter 1032 . The signal P4 may be a direct current signal, and the voltage value of the signal P4 may be greater than the voltage value of the signal P2, for example, the voltage value of the signal P4 may be equal to 5V. The voltage value of the signal P4 may also be equal to other values, and the application does not limit the specific value of the voltage value of the signal P4.

The first voltage converter 1031 can be implemented based on existing technologies, for example, it can be a boost converter BOOST, etc. The present application does not limit the specific structure of the first voltage converter 1031 .

An exemplary structure of the second voltage converter 1032 is introduced below. FIG. 3 shows an exemplary structural diagram of the second voltage converter 1032 according to the embodiment of the present application.

As shown in FIG. 3, the second voltage converter 1032 according to the embodiment of the present application may include field effect transistors Q1, Q2, Q3, and Q4, where the field effect transistors Q1 and Q3 may be of the same type (for example, both are P channel, or both are N channel) field effect transistors, field effect transistors Q2 and Q4 can be a group of field effect transistors of the same type (for example, both are N channel, or both are P channel), field effect transistors Q1, Q3 may be field effect transistors of different types from field effect transistors Q2, Q4.

Wherein, the first pole q11 of the field effect transistor Q1 may be connected to the second pole q22 of the field effect transistor Q2 for receiving the signal P4. The second pole q12 of the field effect transistor Q1 can be connected to the second pole q42 of the field effect transistor Q4 for connecting to one end of the heating module 104 . The first pole q21 of the field effect transistor Q2 can be connected to the first pole q31 of the field effect transistor Q3 for connecting the other end of the heating module 104 . The second pole q32 of the field effect transistor Q3 and the first pole q41 of the field effect transistor Q4 can be connected to the ground GND, and the third poles q13, q23, q33, and q43 of the field effect transistors Q1-Q4 can respectively receive the signal P5. Signal P5 may eg come from a processor.

The signal P5 can be a square wave with a certain frequency and duty cycle, the third pole of the field effect transistor Q1-Q4 can be a gate, the first pole can be a source (or drain), and the second pole can be a drain ( or source), by receiving the signal P5, a group of field effect transistors including field effect transistors Q1 and Q3 and another group of field effect transistors including field effect transistors Q2 and Q4 can be turned on or off alternately. That is to say, the voltage value output from the second voltage converter 1032 to both ends of the heating module 104 can alternately be equal to the voltage value of the signal P4 (for example, 5V) and the voltage value of the GND (for example, 0V). FIG. 4 shows an exemplary schematic diagram of voltage values output to both ends of the heating module 104 by the second voltage converter 1032 within a period of time according to an embodiment of the present application.

As shown in FIG. 4 , within a period of time, an ideal waveform of the voltage value output from the second voltage converter 1032 to the two ends of the heating module 104 can be a square wave, wherein the frequency and duty cycle of the waveform can be compared with that of the signal P5 The frequency and the duty cycle are the same, and in this way, the voltage across the heating module 104 continuously changes as shown in FIG. 4 , that is, the heating module 104 can pass an AC signal (signal P3 ).

The signal P5 may also come from other components in the electronic device (such as a controller, not shown), etc., and the present application does not limit the source of the signal P5.

Those skilled in the art should understand that the second voltage converter 1032 may also be implemented with other structures. As long as the second voltage converter 1032 can generate the AC signal P3 based on the DC signal P4, the application does not limit the specific structure of the second voltage converter 1032.

Those skilled in the art should understand that the heat generation control module 103 may also be implemented with other structures. As long as the heating control module 103 can generate the AC signal P3 based on the DC signal P2 , the application does not limit the specific structure of the heating control module 103 .

As shown in FIG. 5 , the heating module 104 includes a coil 1041 and a capacitor 1042 , wherein the coil 1041 is connected to the capacitor 1042 , and the coil 1041 and the capacitor 1042 are respectively used as two ends of the heating module 104 to connect to the heating control module 103 . The heat generated by the heating module in the embodiment of the present application mainly includes the heat generated by the current generated by the coil causing the coil to generate heat. Therefore, the heating efficiency of the heating module is related to the magnitude of the current generated by the coil. The larger the current generated by the coil, the higher the heating efficiency; the smaller the current generated by the coil, the lower the heating efficiency. Based on this, in the embodiment of the present application, the coil is connected in series with the capacitor to reduce the impedance of the heating module. For example, according to the parameters of the coil and the capacitor, the frequency and duty cycle of the AC signal output to the coil when the impedance of the heating module is less than the impedance threshold can be firstly determined. Preferably, the frequency and duty cycle of the AC signal output to the coil can be determined such that the impedance of the heating module is minimized. The frequency and duty cycle of the signal P5 can use the determined frequency and duty cycle, so that the second voltage converter can generate the AC signal of the determined frequency and duty cycle according to the signal p5, and then make the heating module pass through When the alternating current signal with the determined frequency and duty ratio is used, the maximum current is generated, so that the coil heats up faster, so as to achieve higher heating efficiency.

The processor 101, battery 102, heating control module 103, and heating module 104 themselves may be existing components of the electronic device. For example, when the electronic device is a mobile phone, the processor 101 may be the central processing unit or graphics processing unit of the mobile phone. The battery 102 can be a battery on a mobile phone, and the heating control module 103 and the heating module 104 can be implemented through a wireless charging circuit in an electronic device. For example, the first voltage converter 1031 in the heating control module 103 can be a voltage booster in the wireless charging circuit. The converter BOOST, the second voltage converter 1032 can be a TX/RX chip for wireless charging, and the coil 1041 in the heating module 104 can be a wireless charging coil in a mobile phone wireless charging circuit or a near field communication (near field communication, NFC ) coil, the capacitor 1042 may be a capacitor connected in series with the wireless charging coil or the near field communication coil, and so on. Therefore, the electronic device according to the embodiment of the present application can heat the battery without adding new components when it is in a low-temperature environment, and has high heating efficiency. The heat does not need to be transmitted through the main board, which can have a better heating effect. Therefore, in a low-temperature environment, the battery can be heated without increasing the cost and area of the circuit, and has better heating effect and higher heating efficiency.

FIG. 6 shows an exemplary schematic diagram of a battery heating method according to an embodiment of the present application. In a possible implementation manner, the electronic device according to the embodiment of the present application may execute the method for heating the battery shown in FIG. 6 , so as to heat the battery. For an exemplary structure of an electronic device, reference may be made to the description of FIGS. 1-5 above. The following describes an exemplary workflow of a battery heating method according to an embodiment of the present application with reference to FIGS. 1-6 .

As shown in Figure 6, the battery heating method of the embodiment of the present application includes steps S1-S5:

In step S1, the processor detects whether the electronic device is in a low-temperature environment, and when the electronic device is in a low-temperature environment, the following step S2 is executed. Wherein, for an exemplary manner of detecting whether the electronic device is in a low-temperature environment, reference may be made to the relevant description in FIG. 1 above, and details are not repeated here.

Step S2, the processor controls the battery to generate a signal P2 and provide it to the first voltage converter of the heating control module, and generate a signal P5 with a preset frequency and duty cycle and provide it to the second voltage converter of the heating control module. When the first voltage converter receives the signal P2, the following step S3 is executed, and when the second voltage converter receives the signal P5, the following step S4 is executed. Wherein, for an exemplary manner of generating the signal P2, refer to the relevant description in FIG. 1 above, and for an exemplary manner of generating the signal P5, refer to the relevant description of the foregoing FIG. 3 , which will not be repeated here.

Step S3, the first voltage converter of the heating control module generates a signal P4 according to the signal P2. Wherein, for an exemplary manner of generating the signal P4, reference may be made to the relevant description in FIG. 2 above, and details are not repeated here.

Step S4, the second voltage converter of the heating control module controls a group of field effect transistors Q1, Q3 and another group of Q2, Q4 to turn on and off alternately according to the signal P5, and the second voltage converter of the heating control module also receives When signal P4 is received, signal P3 is generated and provided to the heating module. When the heating module receives the signal P3, the following step S5 is executed. Wherein, for an exemplary manner of generating the signal P3, reference may be made to the relevant description in FIG. 4 above, and details are not repeated here.

Step S5, the coil of the heating module generates current according to the signal P3, and generates heat according to the current to provide to the battery. For an exemplary manner of generating current, refer to the relevant description of FIG. 5 above, and for an exemplary manner of generating heat according to the current and supplying it to the battery, refer to the relevant descriptions of FIG. 1 and FIG. 5 above, which will not be repeated here.

Above, the signal P5 is generated by the processor as an example. Those skilled in the art should understand that the signal P5 may also be generated by the processor controlling other components in the electronic device (such as a controller, not shown), and the present application does not limit the generation method of the signal P5.

The electronic device in the embodiment of the present application may be applied to an application scenario where no external power source is connected to the electronic device. In this case, when performing the battery heating method of the embodiment of the present application, in addition to the heat provided by the coil, the process of the battery generating the signal P1 will also generate heat, which can further improve the heating efficiency.

The electronic device in the embodiment of the present application may be applied to an application scenario where an external power source is connected to the electronic device. In this case, in a possible implementation manner, when performing the battery heating method of the embodiment of the present application, in addition to the heat provided by the coil, the process of generating the signal P1 by the battery will also generate heat, which can further improve the heating efficiency. In another possible implementation manner, when performing the battery heating method of the embodiment of the present application, the signal P1 may be provided by an external power source, which may reduce battery power consumption caused by the battery heating process.

Those skilled in the art should understand that in the battery heating method of the embodiment of the present application, steps S2-S4 are only performed when the electronic device is in a low-temperature environment, so as to heat the battery until the temperature of the electronic device meets normal working requirements. The above-mentioned processor, battery, heating control module, and heating module need to realize the functions that can be realized in the prior art when the temperature of the electronic equipment meets the normal working requirements. For example, when the second voltage converter of the heating control module is a TX/RX chip used for wireless charging, the TX/RX chip will only be activated under the premise that the temperature of the electronic device is greater than a certain threshold so that the temperature of the electronic device meets the normal working requirements. It can realize the reverse wireless charging function of transmitting wireless charging signals to other devices as TX, or realize the forward wireless charging function of receiving wireless charging signals from other devices as RX. However, when the temperature of the electronic device meets the normal working requirement, the battery heating method in the embodiment of the present application has stopped working, so the battery heating method of the present application does not affect the working mode when the temperature of the electronic device meets the normal working requirement.

As shown in FIG. 7, in a possible implementation, the present application provides a battery heating device 70, the battery heating device 70 is applied to an electronic device 7, and the battery heating device 70 includes: a processor 701, a battery 702, a heating control module 703 and a heating module 704, the battery 702 is adjacent to the heating module 704, and the processor 701 is configured to control the battery 702 to generate A first DC voltage signal A1; the heating control module 703 is used to generate a second AC voltage signal A2 according to the first voltage signal A1, and the heating module 704 is used to generate heat according to the second voltage signal A2 and provided to the battery 702 .

Wherein, the processor 701 can refer to the example of the processor 101 in FIG. 1 and related descriptions above, the battery 702 can refer to the example of the battery 102 in FIG. 1 and related descriptions above, and the first threshold can refer to the example of the battery 102 in FIG. For an example of the first temperature threshold in the related description, the first voltage signal A1 may refer to the example of the signal P2 in the related description above and FIG. 1 . The heating control module 703 may refer to the example of the heating control module 103 in FIG. 1 and related descriptions above, and the second voltage signal A2 may refer to the example of the signal P3 in the above and related descriptions of FIG. 1 . For the heating module 704, reference may be made to the example of the heating module 104 in the above and related descriptions of FIG. 1 .

In a possible implementation manner, the heating module 704 includes a coil and a capacitor connected in series, and the second voltage signal A2 has a frequency and a duty cycle that make the impedance of the heating module 704 smaller than a second threshold.

Wherein, the serial coil and capacitor included in the heating module 704 can refer to the example of the coil 1041 and the capacitor 1042 in the above and related description of FIG. 5 . For the second threshold, refer to the example of the impedance threshold mentioned above and in the related description of FIG. 5 . The frequency and duty cycle of the second voltage signal A2 can refer to the example of the frequency and duty cycle of the signal P3 described above and in relation to FIG. 4 .

In a possible implementation manner, the heating control module 703 includes a first voltage converter and a second voltage converter, the first voltage converter is used to generate a third DC voltage according to the first voltage signal A1 signal, the voltage value of the third voltage signal is greater than the voltage value of the first voltage signal; the second voltage converter is used to generate the second voltage signal A2 according to the third voltage signal.

Wherein, the first voltage converter can refer to the example of the first voltage converter 1031 in the above and the related description of FIG. 2 , and the second voltage converter can refer to the second voltage converter in the above and the related description of FIG. 2 For an example of 1032, the third voltage signal may refer to the example of the signal P4 above and in the related description of FIG. 2 .

The first voltage signal is the signal directly output by the battery. First, the voltage value is relatively low, usually between 3.5-4.4V. The second voltage signal directly used to obtain the AC will make the voltage value of the second voltage signal lower, which is not It is beneficial for the heating module to obtain a larger current, that is, it is not conducive to ensuring a higher heating efficiency. Second, the voltage value is not stable enough. The second voltage signal directly used to obtain the AC will cause the voltage value of the second voltage signal to fluctuate, which is not conducive to the stable heating effect of the heating module. By setting the first voltage converter, the stable third voltage signal with a higher voltage value is output to the heating module, which can ensure that the heating module has higher heating efficiency and stable heating effect.

In a possible implementation manner, the second voltage converter includes a first field effect transistor, a second field effect transistor, a third field effect transistor, and a fourth field effect transistor, and the first field effect transistor of the first field effect transistor One pole and the second pole of the second field effect transistor respectively receive the third voltage signal, and the second pole of the first field effect transistor is connected to the second pole of the fourth field effect transistor and the heating module One end of the second field effect transistor, the first pole of the second field effect transistor is connected to the first pole of the third field effect transistor and the other end of the heating module, the second pole of the third field effect transistor is connected to the first pole of the first field effect transistor The first poles of the four field effect transistors are respectively connected to ground GND, and the third poles of the first field effect transistor, the second field effect transistor, the third field effect transistor, and the fourth field effect transistor respectively receive A first control signal, the first control signal is used to control the first field effect transistor, the second field effect transistor, the third field effect transistor, the first pole of the fourth field effect transistor and The second poles are turned on or off, and the first control signal is generated by the processor when the temperature information is lower than a first threshold.

Wherein, the first field effect transistor, the second field effect transistor, the third field effect transistor, and the fourth field effect transistor can refer to the examples of field effect transistors Q1 , Q2 , Q3 , and Q4 in the above description and related description of FIG. 3 . The first electrode of the first field effect transistor, the second field effect transistor, the third field effect transistor, and the fourth field effect transistor can refer to the examples of q11, q21, q31, and q41 in the above description and the related description of FIG. For the second pole, refer to the examples of q12, q22, q32, and q42 in the above and related description of FIG. 3 , and for the third pole, refer to the examples of q13, q23, q33, and q43 in the above and related description of FIG. 3 . For the first control signal, reference may be made to the example of the signal P5 in the above and related descriptions of FIG. 3 .

In a possible implementation manner, the second voltage converter is further configured to receive a first control signal, the first control signal is generated by the processor when the temperature information is lower than a first threshold, The generating the second voltage signal according to the third voltage signal includes: generating the second voltage signal according to the third voltage signal and the first control signal.

In a possible implementation manner, when the first control signal turns on or off the first pole and the second pole of the first field effect transistor and the third field effect transistor, the Turn off or conduct between the first pole and the second pole of the second field effect transistor and the fourth field effect transistor, and the first pole and the second pole of the first field effect transistor and the third field effect transistor When the conduction between the second poles and the cut-off between the first pole and the second pole of the second field effect transistor and the fourth field effect transistor, the voltage value of one end of the heating module is equal to the first pole The voltage value of the three-voltage signal, the voltage value of the other end of the heating module is equal to 0; the conduction between the first pole and the second pole of the second field effect transistor and the fourth field effect transistor, the When the first pole and the second pole of the first field effect transistor and the third field effect transistor are turned off, the voltage value at one end of the heating module is equal to 0, and the voltage value at the other end of the heating module is equal to The voltage value of the third voltage signal.

In a possible implementation manner, the first control signal makes the connection between the first pole and the second pole of the first field effect transistor and the third field effect transistor The first pole and the second pole of the fourth field effect transistor are alternately turned on to generate the second voltage signal.

In a possible implementation manner, the first control signal is a square wave, and the frequency and duty cycle of the first control signal are equal to the frequency and duty cycle of the second voltage signal.

In a possible implementation manner, the coil includes at least one of a wireless charging coil or a near field communication coil of an electronic device.

In this way, as long as the electronic device includes one of the wireless charging coil and the near-field communication coil, heat can be generated to heat the battery, which can improve the structural flexibility of the battery heating device.

In a possible implementation manner, the heating control module and the heating module are realized by a wireless charging circuit in an electronic device.

When heating the battery based on the battery heating device, it is not necessary to change the components of the electronic equipment, only to generate a response signal, and the cost and area of the circuit will not be increased.

As shown in FIG. 8 , in a possible implementation manner, an embodiment of the present application provides an electronic device 7 , where the electronic device includes the battery heating device 70 described above. For the electronic device 7, reference may be made to the example of the electronic device in the related description of FIG. 1 above.

Although the present invention has been described in conjunction with various embodiments herein, in the process of implementing the claimed invention, those skilled in the art can understand and Other variations of the disclosed embodiments are implemented. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Having described various embodiments of the present application above, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. The terminology used herein is chosen to best explain the principle of each embodiment, practical application or improvement of technology in the market, or to enable other ordinary skilled in the art to understand each embodiment disclosed herein.

Claims

A battery heating device, characterized in that the battery heating device is applied to electronic equipment, and the battery heating device includes: a processor, a battery, a heating control module and a heating module, the battery is adjacent to the heating module,

The processor is configured to control the battery to generate a first DC voltage signal when the temperature information of the battery is lower than a first threshold;

The heating control module is used to generate a second AC voltage signal according to the first voltage signal, and the heating module is used to generate heat according to the second voltage signal and provide it to the battery.
The device according to claim 1, wherein the heating module comprises a coil and a capacitor connected in series,

The second voltage signal has a frequency and a duty cycle such that the impedance of the heat generating module is less than a second threshold.
The device according to claim 1 or 2, wherein the heating control module comprises a first voltage converter and a second voltage converter,

The first voltage converter is used to generate a DC third voltage signal according to the first voltage signal, and the voltage value of the third voltage signal is greater than the voltage value of the first voltage signal;

The second voltage converter is used to generate the second voltage signal according to the third voltage signal.
The device according to claim 3, wherein the second voltage converter comprises a first field effect transistor, a second field effect transistor, a third field effect transistor, and a fourth field effect transistor,

The first pole of the first field effect transistor and the second pole of the second field effect transistor respectively receive the third voltage signal, and the second pole of the first field effect transistor is connected to the fourth field effect transistor The second pole of the second field effect transistor and one end of the heating module, the first pole of the second field effect transistor is connected to the first pole of the third field effect transistor and the other end of the heating module, and the third field effect transistor The second pole of the tube and the first pole of the fourth field effect tube are respectively connected to the ground GND, the first field effect tube, the second field effect tube, the third field effect tube, the fourth field effect tube The third electrodes of the field effect transistors respectively receive first control signals, and the first control signals are used to control the first field effect transistor, the second field effect transistor, the third field effect transistor, the first field effect transistor The first pole and the second pole of the four field effect transistors are turned on or off, and the first control signal is generated by the processor when the temperature information is lower than a first threshold.
The device according to claim 3 or 4, wherein the second voltage converter is also used to receive a first control signal, and the first control signal is generated by The processor generates,

The generating the second voltage signal according to the third voltage signal includes:

The second voltage signal is generated according to the third voltage signal and the first control signal.
The device according to any one of claims 3-5, wherein the first control signal makes the first pole and the second pole of the first field effect transistor and the third field effect transistor When conducting or turning off between the first and second poles of the second field effect transistor and the fourth field effect transistor, turning off or conducting between the first pole and the second pole,

Conduction between the first pole and the second pole of the first field effect transistor and the third field effect transistor, the first pole and the second pole of the second field effect transistor and the fourth field effect transistor When the poles are turned off, the voltage value of one end of the heating module is equal to the voltage value of the third voltage signal, and the voltage value of the other end of the heating module is equal to 0;

Conduction between the first pole and the second pole of the second field effect transistor and the fourth field effect transistor, the first pole and the second pole of the first field effect transistor and the third field effect transistor When the poles are turned off, the voltage value at one end of the heating module is equal to 0, and the voltage value at the other end of the heating module is equal to the voltage value of the third voltage signal.
The device according to any one of claims 3-6, wherein the first control signal makes the first pole and the second pole of the first field effect transistor and the third field effect transistor The first electrode and the second electrode of the second field effect transistor and the fourth field effect transistor are alternately conducted to generate the second voltage signal.
The device according to any one of claims 3-7, wherein the first control signal is a square wave, and the frequency and duty cycle of the first control signal are equal to the frequency of the second voltage signal and duty cycle.
The device according to any one of claims 2-8, wherein the coil comprises at least one of a wireless charging coil or a near field communication coil of an electronic device.
The device according to any one of claims 1-9, wherein the heating control module and the heating module are realized by a wireless charging circuit in an electronic device.
An electronic device, characterized in that the electronic device comprises the battery heating device according to any one of claims 1-10.