Terminal device

Abstract

The invention discloses terminal equipment, and belongs to the field of terminal equipment. The terminal equipment comprises a vapor chamber, a temperature detection device, an on-off module, a battery, a battery rear cover and a processor, and the vapor chamber is fixed on a shell of the terminal equipment and covers a first surface of the battery; the on-off module is arranged between the vapor chamber and the power supply end and used for connecting or disconnecting a circuit between the vapor chamber and the power supply end, and the power supply end comprises an electric energy output end of a battery or an electric energy input end of a charging interface of the terminal equipment; the temperature detection device is used for detecting the surface temperature of at least one of the first surface and the second surface of the battery, the second surface and the first surface are oppositely arranged, and the second surface is a surface close to a battery rear cover; the control module is used for sending a control command under the condition that the surface temperature of the first surface or the second surface detected by the temperature detection device is lower than a lower limit threshold value, and the control command is used for controlling the on-off module to conduct electric connection between the vapor chamber and the power supply end.

Description

Technical Field

[0001] The present application belongs to the technical field of terminal equipment, and specifically relates to a terminal equipment. Background Art

[0002] In the related technology, the terminal equipment uses silicon negative electrode batteries, that is, silicon carbide (SiC) materials are added to the anode materials of the battery. The battery capacity increased by different proportions of SiC materials is different. At present, the weight energy density (ED) of silicon negative electrode batteries is about 10%~15% higher than that of conventional graphite batteries. However, since silicon materials themselves are semiconductor materials, their conductivity mainly depends on carriers, that is, electrons and holes. Therefore, in low temperature environments (such as <15°C), the internal resistance of silicon negative electrode batteries increases, the available capacity of discharge decreases rapidly, and the charging speed slows down. At low temperatures, the viscosity of the electrolyte increases, the ion diffusion rate slows down, the electrochemical reaction rate of the electrode material decreases, and the kinetic conditions of lithium ion embedding into the negative electrode deteriorate. In addition, the semiconductor characteristics of silicon materials, at this time, if a high-rate charging method is used for a long time, the lithium deposition side reaction on the negative electrode surface is more likely to occur, and lithium precipitation is likely to occur, resulting in the appearance of lithium dendrites. In the long run, lithium dendrites may pierce the diaphragm, causing internal shorts, and there are safety risks. Therefore, in the related art, the current silicon negative electrode battery has poor charging or discharging performance when used in a low temperature environment (<15°C). Summary of the invention

[0003] The present application aims to provide a terminal device that at least solves one of the problems of poor charging and discharging performance of silicon negative electrode batteries in low temperature environments.

[0004] In order to solve the above technical problems, this application is implemented as follows: In the first aspect, an embodiment of the present application proposes a terminal device, comprising: a heat spreader, a temperature detection device, a switching module, a battery, a battery back cover and a processor, wherein the heat spreader is fixed on the housing of the terminal device and covers the first surface of the battery; the switching module is arranged between the heat spreader and the power supply end, and is used to connect or disconnect the circuit between the heat spreader and the power supply end, and the power supply end includes the power output end of the battery or the power input end of the charging interface of the terminal device; the temperature detection device is used to detect the surface temperature of at least one of the first surface and the second surface of the battery, wherein the second surface is arranged opposite to the first surface, and the second surface is a surface close to the battery back cover; and is used to send a control command when the surface temperature of the first surface or the second surface detected by the temperature detection device is lower than a lower limit threshold, and the control command is used to control the switching module to conduct the electrical connection between the heat spreader and the power supply end.

[0005] In an embodiment of the present application, the terminal device includes a temperature detection device for detecting the upper surface temperature and / or lower surface temperature of the battery, and also includes a heat spreader covering the first surface of the battery, and the heat spreader is electrically connected to the power supply end through a switching module. When the temperature detection device detects that the upper surface or lower surface temperature of the battery is low, the processor switches on the electrical connection between the heat spreader and the power supply end, thereby heating the battery and improving the battery charging or discharging performance.

[0006] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of a principle module of a terminal device according to an embodiment of the present application; Figure 2 is a schematic diagram of the basic architecture of a terminal device according to an embodiment of the present application; Figure 3 is another schematic diagram of a principle module of a terminal device according to an embodiment of the present application; Figure 4 is a schematic diagram of a partial architecture of a terminal device according to an embodiment of the present application; Figure 5 is a schematic diagram of the principle structure of a heat sink of a terminal device according to an embodiment of the present application; Figure 6 is a flow chart of a heating control method according to an embodiment of the present application; Figure 7 is another flow chart of the heating control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0008] Embodiments of the present invention will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0009] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0010] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0011] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0012] Combine the following Figure 1-Figure 5 Describe a terminal device according to an embodiment of the present application.

[0013] like Figure 1 As shown, the terminal device according to some embodiments of the present application includes: a heat sink 101, a temperature detection device 102, a switching module 103, a battery 104, a battery back cover 105 and a processor 106. Figure 1 and 2As shown, the heat spreader 101 is fixed on the shell 109 of the terminal device and covers the first surface of the battery 104; the on-off module 103 is arranged between the heat spreader 101 and the power supply end 107, and is used to connect or disconnect the circuit between the heat spreader 101 and the power supply end 107, and the power supply end 107 includes the power output end of the battery 103 or the power input end of the charging interface 108 of the terminal device; the temperature detection device 102 is used to detect the surface temperature of at least one of the first surface and the second surface of the battery 104, wherein the second surface is arranged opposite to the first surface, and the second surface is a surface close to the battery back cover 105; the processor 106 is used to send a first control command when the surface temperature of the first surface or the second surface detected by the temperature detection device 102 is lower than the lower limit threshold, and the first control command is used to control the on-off module 103 to conduct the electrical connection between the heat spreader 101 and the power supply end 107.

[0014] In an embodiment of the present application, the lower threshold value can be set according to the actual situation of the battery. If the temperature of the battery is lower than the lower threshold value, the internal resistance of the battery increases, which slows down the charging speed of the battery. For example, if the battery is at 15 degrees or below, the internal resistance of the battery increases and the available discharge capacity decreases rapidly, then the lower threshold value can be set to 15 degrees.

[0015] In the embodiment of the present application, the heat spreader 101 may partially cover the first surface of the battery 104, or may completely cover the first surface of the battery 104. The size of the heat spreader 101 may be larger than the size of the battery 104, or may be smaller than the size of the battery 104. Alternatively, the size of the heat spreader 101 may be the same as the size of the battery 104, which is not specifically limited in the embodiment of the present application.

[0016] In some embodiments, the processing module 106 is further used to control the charging module 112 of the terminal device to charge the battery 104 of the terminal device according to the first charging current when it is determined that a charger is connected to the charging interface of the terminal device and the surface temperature of the first surface or the second surface detected by the temperature detection device 102 is lower than the lower limit threshold, wherein the first charging current corresponds to a first temperature range, the first temperature range is the temperature range where the lowest temperature of the surface temperatures of the first surface and the second surface is located, and the temperature range is proportional to the charging current, that is, the lower the temperature range, the smaller the corresponding charging current. For example, if the temperature detection device 102 only detects the surface temperature of the first surface of the battery 104, the first temperature range is the temperature range where the surface temperature of the first surface is located, if the temperature detection device 102 only detects the surface temperature of the second surface of the battery 104, the first temperature range is the temperature range where the surface temperature of the second surface is located, and if the temperature detection device 102 detects the surface temperatures of the first surface and the second surface of the battery 104 at the same time, the first temperature range is the temperature range where the lower temperature of the surface temperatures of the first surface and the second surface is located.

[0017] In some embodiments, the processor 106 may also be used to control the charging module 112 of the terminal device to charge the battery 104 of the terminal device according to a second charging current when the surface temperature of the first surface or the second surface detected by the temperature detection device 102 is greater than or equal to the lower threshold, wherein the second charging current corresponds to a second temperature range, and the second temperature range is a temperature range in which the temperature of the motherboard area of ​​the terminal device is located. In these embodiments, in the process of charging the battery 104 according to the first charging current, since the heat spreader 101 heats the battery 104, the temperature of the battery 104 will gradually increase. In order to improve the charging efficiency, the charging current may be adjusted according to the temperature of the motherboard area of ​​the terminal device when the surface temperature of the first surface or the second surface is greater than or equal to the lower threshold to improve the charging efficiency.

[0018] In some embodiments, the processor 106 may also be configured to reduce the power supply current of the vapor chamber when the temperature difference between the surface temperature of the first surface and the surface temperature of the second surface is greater than a first set value and the surface temperature of the first surface or the second surface is less than the lower threshold. In these embodiments, when the surface temperature difference between the upper and lower surfaces of the battery 104 is large and the surface temperature of one of the surfaces is still lower than the lower threshold, the power supply current of the vapor chamber may be reduced to reduce the temperature difference between the upper and lower surfaces of the battery 104.

[0019] In the embodiment of the present application, the first setting value may be determined by actual application, for example, the first setting value may be set to 5 degrees.

[0020] In the embodiment of the present application, the heat spreader 101 may be a vacuum chamber heat spreader (Vapor Chamber, VC).

[0021] In the embodiment of the present application, the heat spreader 101 can conduct heat to the processor, power management unit (PMU) and other areas of the terminal device with severe heat generation during normal use, and also transfer heat to the battery generated during the charging process, and evenly transfer the heat to device modules such as the middle frame / LCM, thereby reducing the temperature of the battery area.

[0022] In an embodiment of the present application, the temperature detection device 102 can perform rotation detection on the battery surface temperature. When the detected temperature is lower than the lower limit threshold, the processor 106 triggers the on-off module 103 to turn on the electrical connection between the heat spreader 101 and the power supply end 107, thereby causing the heat spreader 101 to heat up, and then preheating the battery 103 to ensure that the battery temperature is not lower than the set lower limit threshold.

[0023] In the embodiment of the present application, the heat sink of the middle frame insert is used to generate heat at low temperature, and the temperature of the battery is increased through heat transfer. Therefore, the battery is kept at room temperature or a higher temperature during the charging and discharging process, so that the charging speed and discharge capacity are greatly improved, further improving the user experience.

[0024] In some embodiments, a first conductive point 1011 is disposed on a first edge of the vapor chamber 101, a second conductive point 1012 is disposed on a second edge of the vapor chamber 101, the first edge is opposite to the second edge, the vapor chamber 101 is electrically connected to the on-off module 103 via the first conductive point 1011, and is electrically connected to the housing 109 of the terminal device via the second conductive point 1012, and the edge of the vapor chamber 101 except the first conductive point and the second conductive point is fixed to the housing 109 via insulating material. In the embodiment of the present application, the housing 109 is a conductive housing, that is, the housing 109 includes a conductive material.

[0025] In the embodiment of the present application, the housing 109 may be a partial housing of the terminal device, for example, a metal middle frame of the terminal device. Figure 3As shown, the first conductive point 1011 can be a metal spring or a metal surface, which is arranged at the upper end of the middle frame and connected to the mainboard circuit of the terminal device through the metal spring or the metal surface. The connection method can be through the spring or the conductive foam, and the on-off module 103 can be arranged on the mainboard circuit and electrically connected to the spring or the conductive foam through the conductive component on the mainboard circuit. The second conductive point 1012 can be connected to the metal middle frame 109 at the bottom through the conductive foam or the conductive glue. The connection method can be electrically connected through the conductive foam or the conductive cloth, and the rest of the edge of the heat spreader 101 can be bonded to the metal middle frame 109 through the insulating glue. The first conductive point 1011 is connected to the power supply end, and the second conductive point 1012 is connected to the metal middle frame 109. The metal middle frame 109 is the common ground, thereby forming a Figure 4 The actual equivalent circuit model is shown.

[0026] In some embodiments, Figure 5 As shown, the terminal device may further include a gating module 110, which is used to select the power output end of the battery 104 as the power supply end 107 electrically connected to the heat spreader 101, or select the power input end of the charging interface 108 as the power supply end 107 electrically connected to the heat spreader 101 under the control of the processor 105. That is to say, in these embodiments, the gating module 110 may select the battery 104 to power the heat spreader 101, or may select the charging interface 108 to power the heat spreader 101, so that when a charger is connected, the heat spreader 101 can be powered by the charger, thereby reducing the power loss of the battery 104.

[0027] In some embodiments, the processor 106 may send a second control instruction to the selection module 110 when it is determined that a charger is connected. The second control instruction is used to control the selection module 110 to select the power input end of the charging interface as the power supply end electrically connected to the heat sink, and the selection module 110 selects the power input end of the charging interface 108 as the power supply end 107 based on the received second control instruction.

[0028] In the above embodiment, optionally, the processor 106 may also send a third control instruction to the selection module 110 when it is determined that the charger is unplugged from the charging interface 108 of the terminal device, wherein the third control instruction is used to control the selection module 110 to select the power output end of the battery 104 as the power supply end 107; the selection module 110 is also used to select the power output end of the battery 104 as the power supply end 107 based on the received third control signaling.

[0029] In some embodiments, the processor 106 may send a third control instruction to the selection module 110 when it is detected that no charger is connected, wherein the third control instruction is used to control the selection module 110 to select the power output terminal of the battery 104 as the power supply terminal 107; the selection module 110 is used to select the power output terminal of the battery 104 as the power supply terminal 107 based on the received third control instruction.

[0030] Optionally, the processor 106 may further send the third control instruction when determining that the battery power is greater than the second set value, thereby ensuring the standby time of the terminal device.

[0031] In some embodiments, the processor 106 is further configured to send a fourth control command when the surface temperature of the first surface or the second surface is higher than an upper threshold value, and the fourth control command is configured to control the on-off module 103 to disconnect the electrical connection between the vapor chamber 101 and the power supply terminal 107. Through these embodiments, when the surface temperature of the battery 104 rises to the upper threshold value, the power supply to the vapor chamber 101 can be disconnected to ensure that the temperature of the battery 104 does not exceed the upper threshold value, thereby saving energy consumption.

[0032] In some embodiments, Figure 2 As shown, the temperature detection device 102 may include at least one of a first temperature sensor 1021 and a second temperature sensor 1022. The first temperature sensor 1021 is arranged between the heat spreader 101 and the first surface of the battery 104, and is mainly used to detect the temperature of the first surface of the battery 104, that is, the lower surface temperature. The second temperature sensor 1022 is arranged between the second surface of the battery 104 and the battery back cover 105, and is mainly used to detect the temperature of the second surface of the battery 104, that is, the upper surface temperature.

[0033] In some embodiments, the temperature detection device 102 may further include a third temperature sensor 1023 and a fourth temperature sensor 1024. The third temperature sensor 1023 is disposed on the mainboard area 111 of the terminal device, and is mainly used to detect the temperature of the mainboard area 111. The fourth temperature sensor 1024 is disposed on the battery protection board of the terminal device, and is mainly used to detect the temperature rise of the protection board during charging.

[0034] It should be noted that the above-mentioned lower threshold or upper threshold in the embodiments of the present application can be set according to actual applications and is not specifically limited in the embodiments of the present application.

[0035] The embodiment of the present application also provides a heating control method applied to the above terminal device, Figure 6 A schematic diagram of a heating control method provided in an embodiment of the present application is shown as follows: Figure 6As shown, the method 600 mainly includes the following steps.

[0036] S610: Acquire a surface temperature of at least one of a first surface and a second surface of a battery of the terminal device.

[0037] For example, the surface temperature of at least one of the first surface and the second surface of the battery may be acquired by the temperature detection device 102 .

[0038] S612, when the surface temperature of the first surface or the second surface is lower than the lower limit threshold, control the circuit between the heat sink and the power supply end of the terminal device to be conductive, wherein the power supply end includes the power output end of the battery or the power input end of the charging interface of the terminal device.

[0039] In an embodiment of the present application, the surface temperature of the first surface or the second surface being lower than a lower threshold value may mean that the surface temperature of the first surface is lower than the lower threshold value, or the surface temperature of the second surface is lower than the lower threshold value, or the surface temperatures of the first surface and the second surface are both lower than the lower threshold value. In this case, it means that the current ambient temperature is low. In order to improve the performance of the battery, the circuit between the heat spreader and the power supply end is controlled to be conductive, so that the heat spreader is heated up, thereby heating the battery, increasing the temperature of the battery, and thereby improving the performance of the battery.

[0040] In some embodiments, the terminal device may poll the surface temperature of the first surface and / or the second surface of the battery, so as to heat the battery in time when the upper surface temperature and / or the lower surface temperature of the battery is lower than the lower limit threshold.

[0041] In some embodiments, the terminal device can also poll to detect whether a charger is connected. When it is determined that a charger is connected to the charging interface of the terminal device, the charging module of the terminal device can be controlled to charge the battery of the terminal device according to a first charging current, wherein the first charging current corresponds to a first temperature range, and the first temperature range is the temperature range where the lowest temperature of the surface temperatures of the first surface and the second surface is located. The lower the temperature range, the smaller the corresponding charging current.

[0042] Under different ambient temperatures, the battery may correspond to different charging currents. Taking the charging power of 80W and the battery capacity of 5000mAh as an example, the corresponding charging currents in different temperature ranges are: 20~35°CI1 (maximum charging current: 2.8C) 15~20°CI2 (maximum charging current: 2.0C) 10~15°CI3 (maximum charging current: 1C) 5~10°CI4 (maximum charging current: 0.5C) 0~5°CI5 (maximum charging current: 0.1C) -10~-0°CI6 (charging current is minimum or even 0) The current relationship in each temperature range is: I1>I2>>I3>>I4>>I5>I6. It can be seen that when the battery temperature is 15 degrees or below, the charging speed is obviously very slow and the charging time is long. In practical applications, the charging current corresponding to each temperature range can be obtained according to the actual situation of the battery used in the terminal device.

[0043] In the above embodiment, when charging, the temperature sensor inside the terminal device detects that the temperatures of the upper and lower surfaces of the battery are both at the set lower limit temperature T1, for example, below 15 degrees. At this time, the CPU sends an instruction to the on-off module to connect the heat spreader and the power supply end, and power the heat spreader. After the current flows through the heat spreader, since the heat spreader is a conductor, heat is generated to heat the battery and slowly heat it up. Otherwise, the heat spreader and the power supply end are not connected.

[0044] In some embodiments, when it is determined that a charger is connected to the charging interface of the terminal, the power input end of the charging interface can also be selected as the power supply end, that is, the heat sink is powered by the charger, thereby saving battery power.

[0045] In some embodiments, after selecting the power input end of the charging interface as the power supply end, if it is detected that the charger is unplugged from the charging interface of the terminal, the power output end of the battery is selected as the power supply end to continue to power the heat spreader, or the heat spreader may no longer be powered. Alternatively, it may be determined based on the current battery power level whether to select the battery to power the heat spreader. For example, if the current battery power is sufficient and the temperature of the battery surface is low, the battery may be selected to power the heat spreader.

[0046] In some embodiments, after the circuit between the heat spreader and the power supply end of the terminal device is turned on, the surface temperature of the upper and lower surfaces of the battery can continue to be detected. When the surface temperature of the first surface and / or the second surface of the battery obtained is higher than a first upper limit threshold, the circuit between the heat spreader and the power supply end is controlled to be disconnected, thereby avoiding the battery temperature from being too high.

[0047] In some embodiments, after the circuit between the heat spreader and the power supply end of the terminal device is turned on, the upper and lower surface temperatures of the battery can continue to be detected. When the upper surface temperature and / or the lower surface temperature are both greater than or equal to the lower limit threshold, the charging module of the terminal device is controlled to charge the battery of the terminal device according to a second charging current, wherein the second charging current corresponds to a second temperature range, and the second temperature range is the temperature range in which the temperature of the mainboard area of ​​the terminal device is located, thereby improving the charging efficiency.

[0048] In some embodiments, after the circuit between the heat spreader and the power supply end of the terminal device is turned on, the upper and lower surface temperatures of the battery can continue to be detected. When the temperature difference between the upper surface temperature and the lower surface temperature is greater than the first set value and one of the surface temperatures is less than the lower limit threshold, the power supply current of the heat spreader is reduced, thereby reducing the heat generation at the bottom of the battery and extending the heat transfer time, so that the upper and lower surface temperatures of the battery meet the above-mentioned conditions for adjusting the charging current.

[0049] In some embodiments, when it is detected that no charger is connected to the charging interface of the terminal, the power output terminal of the battery is selected as the power supply terminal. Optionally, in order to ensure the use of the battery, when it is determined that the remaining power of the battery of the terminal is greater than a second set value, the power output terminal of the battery can be selected as the power supply terminal to power the heat spreader. The size of the second set value can be determined based on the discharge available capacity of the battery at the current ambient temperature. If the usable time of the battery when heated by the heat spreader is longer than the usable time of the battery when not heated by the heat spreader, the battery can be used to power the heat spreader.

[0050] When it is detected that no charger is connected to the charging interface of the terminal and the remaining power of the battery of the terminal is greater than a second set value, if the upper surface temperature and / or lower surface temperature of the battery is lower than a lower limit threshold (the lower limit threshold may be different from the lower limit threshold when a charger is connected), the circuit between the heat spreader and the power supply end of the terminal device is controlled to be turned on, and the battery is heated by the heat spreader, thereby improving the discharge performance of the battery.

[0051] The second setting value may be a default value, for example, 50% of the power, or may be set by the user, for example, the user may set the second setting value to 20% according to actual needs.

[0052] In some embodiments, while controlling the circuit conduction between the heat spreader and the power supply end of the terminal device, the upper and lower surface temperatures of the battery can continue to be rotated to obtain the upper surface temperature and / or lower surface temperature of the battery. When the upper surface temperature or the lower surface temperature is higher than an upper limit threshold, the circuit between the heat spreader and the power supply end is controlled to be disconnected, thereby avoiding overheating of the battery.

[0053] Figure 7 Another schematic diagram of the heating control method provided in the embodiment of the present application is shown, which can be applied to Figures 1 to 5 The terminal equipment shown, such as Figure 7 As shown, the method mainly includes the following steps.

[0054] S701, during normal use of the terminal, the temperature detection device performs rotation detection normally; S702, determine whether the charger interface is connected, if yes, execute S703, if not, execute S712.

[0055] S703: Set a temperature range according to the lowest value detected by the temperature detection device, and match the corresponding charging window to charge the terminal.

[0056] Among them, under different environmental temperatures, taking the charging power of 80W and the battery capacity of 5000mAh as an example, the corresponding charging windows of the battery are: 20~35°CI1 (maximum charging current: 2.8C) 15~20°CI2 (maximum charging current: 2.0C) 10~15°CI3 (maximum charging current: 1C) 5~10°CI4 (maximum charging current: 0.5C) 0~5°CI5 (maximum charging current: 0.1C) -10~-0°CI6 (charging current is minimum or even 0) The current relationship between each temperature zone is: I1>I2>>I3>>I4>>I5>I6 (when the battery temperature is 15 degrees or below, the charging speed is obviously very slow and the charging time is longer).

[0057] S704, determining whether the temperature of the upper and lower areas of the battery detected by the temperature detection device inside the terminal is at the set lower limit temperature T1, such as below 15 degrees. If yes, execute S705, if not, return to S704 and continue to determine; S705, sending instructions to the on-off module through the CPU to connect the electrical connection between the heat spreader and the power supply end, and supply power to the heat spreader.

[0058] S706, current flows through the vapor chamber. Since the vapor chamber is a conductor, the vapor chamber generates heat to heat the battery and slowly increase the temperature. S707, determine whether the upper and lower surface temperatures of the battery are greater than the lower limit threshold T1, and whether the upper and lower surface temperature difference is less than the set value T0, if not, return to execute S705, if yes, execute S708.

[0059] S708, adjusting the charging current to the charging current within the current temperature window.

[0060] When the battery temperature is slowly heated, the charging current is still set to the current at the initial temperature because the temperature is in a fluctuating state. When it is detected that the upper and lower surface temperatures of the battery are both above the lower limit temperature T1, such as above 15°C, the charging current is adjusted according to the battery temperature window and the temperature of the mainboard area. If the difference between the upper and lower surface temperatures of the battery is greater than the set value T0, and the lower surface temperature of the battery is less than T1, the power supply current to the heat spreader is reduced to reduce the bottom heat generation and extend the heat transfer time so that the upper and lower surface temperatures of the battery meet the above-mentioned conditions for adjusting the charging current.

[0061] S709, determine whether any of the upper and lower surface temperatures of the battery currently detected has reached the set upper limit temperature T2, such as 35°C. If yes, execute S710; if not, return to S709 to continue determination.

[0062] S710, the CPU sends a control instruction to control the on-off module to disconnect the electrical connection between the heat sink and the power supply end.

[0063] S711, stop supplying power to the heat sink, that is, stop heating the battery, and the battery temperature can be maintained by self-charging and heating.

[0064] When the temperature detection device detects that the upper and lower surface temperatures of the battery are both lower than the set temperature lower limit T1 again, the above steps S704 to S711 are repeated.

[0065] S712, the power meter module reports the current power status; When the terminal is in the screen-on discharge state (i.e., the user is using the terminal and there is no charger interface (e.g., USB-C) connected), the temperature detection device starts normal rotation detection, and the power meter module reports the current power status.

[0066] S714, determining whether the battery power is greater than a set value A% (A is 0-100), such as the battery state of charge (SOC)>50%, if yes, executing S715, otherwise, returning to executing S714 and continuing to determine; S715, determining whether the upper and lower surface temperatures of the battery detected by the temperature detection device are both lower than the set temperature threshold T3, if so, executing S716, otherwise, returning to executing S715 and continuing to determine; S716, sending a control instruction to the on-off module through the CPU to connect the heat spreader to the power supply end; S717, the power supply end supplies power to the heat spreader. After the current flows through the heat spreader, the battery is heated. The battery temperature rises slowly, thereby reducing the direct current resistance (DCR) of the battery cell, increasing the battery discharge capacity, and extending the battery life. S718, determining whether any of the upper and lower surface temperatures of the battery detected by the temperature detection device has risen to the upper limit temperature T4, if yes, executing S719, otherwise returning to executing S78; S719, the CPU sends a control instruction to control the on-off module to disconnect the electrical connection between the heat sink and the power supply end.

[0067] S720, stop supplying power to the heat sink, that is, stop heating the battery, and the battery temperature can be maintained by generating heat through its own charging.

[0068] When the temperature detection device detects that the upper and lower surface temperatures of the battery are lower than the set temperature lower limit T3 again, the above steps S712 to S720 are repeated.

[0069] Through the above-mentioned technical scheme provided in the embodiment of the present application, the heat spreader for heat dissipation of the middle frame insert of the terminal device is connected to the on-off module, and the heat spreader is energized through the on-off module to make it generate heat. Through heat transfer, the regional temperature of the battery is increased (to around normal temperature). Therefore, regardless of the charging or discharging process, the battery is kept at normal temperature or at a higher temperature, so that the charging speed and discharge capacity are greatly improved, further improving the user experience, and can also further reduce the lithium plating caused by low-temperature cross-window charging of the battery cell, thereby reducing the safety risk of the battery cell.

[0070] Other components of the terminal device according to the embodiment of the present invention, such as a mainboard and a display, and operations are known to those skilled in the art and will not be described in detail here.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A terminal device, characterized in that: include: A heat sink, a temperature detection device, a switch module, a battery, a battery back cover and a processor, wherein: The heat sink is fixed on the housing of the terminal device and covers the first surface of the battery; The on-off module is disposed between the vapor chamber and the power supply end, and is used to connect or disconnect the circuit between the vapor chamber and the power supply end, wherein the power supply end includes the power output end of the battery or the power input end of the charging interface of the terminal device; The temperature detection device is used to detect the surface temperature of at least one of the first surface and the second surface of the battery, wherein the second surface is arranged opposite to the first surface and is close to the rear cover of the battery; The processor is used to send a first control command when the surface temperature of the first surface or the second surface detected by the temperature detection device is lower than a lower limit threshold, and the first control command is used to control the on-off module to conduct the electrical connection between the heat sink and the power supply end.

2. The terminal device according to claim 1, characterized in that: A first conductive point is arranged on the first edge of the heat spreader, and a second conductive point is arranged on the second edge of the heat spreader. The first edge is opposite to the second edge. The heat spreader is electrically connected to the on-off module through the first conductive point, and is electrically connected to the housing of the terminal device through the second conductive point. The edge of the heat spreader except the first conductive point and the second conductive point is fixed to the housing by insulating material, and the housing is a conductive housing.

3. The terminal device according to claim 1, characterized in that: The processor is also used to control the charging module of the terminal device to charge the battery of the terminal device according to a first charging current when it is determined that a charger is connected to the charging interface of the terminal device and the surface temperature of the first surface or the second surface detected by the temperature detection device is lower than a lower limit threshold, wherein the first charging current corresponds to a first temperature range, the first temperature range is the temperature range where the lowest temperature of the surface temperatures of the first surface and the second surface is located, and the temperature range is proportional to the charging current.

4. The terminal device according to claim 3, characterized in that: The processor is also used to control the charging module of the terminal device to charge the battery of the terminal device according to a second charging current when the surface temperature of the first surface or the second surface detected by the temperature detection device is greater than or equal to the lower limit threshold, wherein the second charging current corresponds to a second temperature range, and the second temperature range is the temperature range in which the temperature of the mainboard area of ​​the terminal device is located.

5. The terminal device according to claim 3, characterized in that: The processor is further configured to reduce a power supply current of the vapor chamber when a temperature difference between a surface temperature of the first surface and a surface temperature of the second surface is greater than a first set value and a surface temperature of the first surface or the second surface is less than a lower limit threshold.

6. The terminal device according to claim 3, characterized in that: Also includes: Strobe module; The processor is further configured to send a second control instruction to the gating module when detecting that a charger is connected to the charging interface of the terminal device, wherein the second control instruction is configured to control the gating module to select the power input end of the charging interface as the power supply end electrically connected to the vapor chamber; The gating module is used to select the power input end of the charging interface as the power supply end electrically connected to the heat spreader based on the received second control instruction.

7. The terminal device according to claim 6, characterized in that: The processor is further configured to, when determining that the charger is unplugged from the charging interface of the terminal device, send a third control instruction to the gating module, wherein the third control instruction is configured to control the gating module to select the power output end of the battery as the power supply end electrically connected to the vapor chamber; The gating module is further configured to select the power output terminal of the battery as the power supply terminal electrically connected to the vapor chamber based on the received third control signaling.

8. The terminal device according to claim 6, characterized in that: The processor is further configured to, when detecting that no charger is connected to the charging interface of the terminal device, send a third control instruction to the gating module, wherein the third control instruction is configured to control the gating module to select the power output end of the battery as the power supply end electrically connected to the vapor chamber; The gating module is used to select the power output terminal of the battery as the power supply terminal electrically connected to the heat spreader based on the received third control instruction.

9. The terminal device according to claim 7 or 8, characterized in that: The processor is further configured to send a third control instruction to the gating module, including: The processor is further configured to send the third control instruction to the gating module when determining that the remaining power of the battery of the terminal is greater than a second set value.

10. The terminal device according to any one of claims 1 to 8, characterized in that: The processor is further configured to send a fourth control command when the surface temperature of the first surface or the second surface is higher than an upper threshold value, wherein the fourth control command is configured to control the on-off module to disconnect the electrical connection between the heat spreader and the power supply end.

11. The terminal device according to any one of claims 1 to 8, characterized in that: The temperature detection device includes at least one of the following: a first temperature sensor disposed between the vapor chamber and the first surface of the battery; A second temperature sensor is disposed between the second surface of the battery and the battery rear cover.

12. The terminal device according to claim 11, characterized in that: The temperature detection device also includes: A third temperature sensor disposed in the mainboard area of ​​the terminal device; A fourth temperature sensor is arranged on the battery protection board of the terminal device.

Images