terminal device

Abstract

The application discloses a terminal device and belongs to the field of terminal devices. The terminal device comprises a heat plate, a temperature detection device, a on-off module, a battery, a battery back cover and a processor, wherein the heat plate is fixed on the shell of the terminal device and covers the first surface of the battery; the on-off module is arranged between the heat plate and a power supply end and is used for connecting or disconnecting the circuit between the heat plate and the power supply end, the power supply end comprising 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 for detecting 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 the surface close to the battery back cover; and the control command is sent for controlling the on-off module to turn on the electrical connection between the heat plate and the power supply end when the surface temperature of the first surface or the second surface detected by the temperature detection device is lower than the lower limit threshold.

Description

Technical Field

[0001] This application belongs to the field of terminal equipment technology, and specifically relates to a terminal device. Background Technology

[0002] In related technologies, terminal devices use silicon anode batteries, which involve doping silicon carbide (SiC) into the anode material. Different proportions of SiC doping result in varying increases in battery capacity. Currently, the gravimetric energy density (ED) of silicon anode batteries is about 10% to 15% higher than that of conventional graphite batteries. However, because silicon is a semiconductor, its conductivity primarily depends on charge carriers, namely electrons and holes. Therefore, at low temperatures (e.g., <15°C), the internal resistance of silicon anode batteries increases, the usable discharge capacity 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 kinetics of lithium ion insertion into the anode deteriorate. Combined with the semiconductor properties of silicon, if high-rate charging is used for extended periods, lithium deposition side reactions on the anode surface become more likely to occur, easily leading to lithium plating and the formation of lithium dendrites. Over time, these lithium dendrites may puncture the separator, causing internal short circuits and posing a safety risk. Therefore, in related technologies, current silicon anode batteries exhibit poor charging or discharging performance when used in low-temperature environments (<15°C). Summary of the Invention

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

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application propose a terminal device, comprising: a heat spreader, a temperature detection device, a switching module, a battery, a battery back cover, and a processor. The heat spreader is fixed to the outer casing of the terminal device and covers a first surface of the battery. The switching module is disposed between the heat spreader and a power supply terminal, used to connect or disconnect the circuit between the heat spreader and the power supply terminal. The power supply terminal includes either the power output terminal of the battery or the power input terminal 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 and second surfaces of the battery, wherein the second surface is disposed opposite to the first surface and is a surface close to the battery back cover. When the surface temperature of the first or second surface detected by the temperature detection device is lower than a lower threshold, the control command is used to control the switching module to connect the electrical connection between the heat spreader and the power supply terminal.

[0006] In embodiments of this 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 plate covering a first surface of the battery. The heat spreader plate is electrically connected to the power supply terminal through an on / off module. When the temperature detection device detects that the upper or lower surface temperature of the battery is low, the processor connects the heat spreader plate to the power supply terminal, thereby heating the battery and improving the battery charging or discharging performance.

[0007] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0008] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0009] Figure 1 This is a schematic diagram of a terminal device according to an embodiment of this application;

[0010] Figure 2 This is a schematic diagram of the basic architecture of a terminal device according to an embodiment of this application;

[0011] Figure 3 This is another schematic diagram of the principle module of the terminal device according to an embodiment of this application;

[0012] Figure 4 This is a partial architecture diagram of a terminal device according to an embodiment of this application;

[0013] Figure 5 This is a schematic diagram of the heat spreader of a terminal device according to an embodiment of this application;

[0014] Figure 6 This is a flowchart of a heating control method according to an embodiment of this application;

[0015] Figure 7 This is another flowchart of the heating control method according to an embodiment of this application. Detailed Implementation

[0016] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. 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. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0017] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The following is combined Figures 1-5 Describes a terminal device according to an embodiment of this application.

[0021] like Figure 1 As shown, the terminal device according to some embodiments of this application includes: a heat spreader 101, a temperature detection device 102, an on / off module 103, a battery 104, a battery back cover 105, and a processor 106. Among them, as... Figure 1 and 2As shown, a heat spreader 101 is fixed on the housing 109 of the terminal device and covers the first surface of the battery 104; a switching module 103 is disposed between the heat spreader 101 and the power supply terminal 107, and is used to connect or disconnect the circuit between the heat spreader 101 and the power supply terminal 107, wherein the power supply terminal 107 includes the power output terminal of the battery 103 or the power input terminal of the charging interface 108 of the terminal device; a 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 disposed opposite to the first surface and is the surface close to the battery back cover 105; a 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 a lower threshold value, the first control command being used to control the switching module 103 to conduct the electrical connection between the heat spreader 101 and the power supply terminal 107.

[0022] In this embodiment of the application, the lower limit threshold can be set according to the actual situation of the battery. If the temperature of the battery is lower than the lower limit threshold, 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 usable capacity of the discharge decreases rapidly. In this case, the lower limit threshold can be set to 15 degrees.

[0023] In this embodiment, the heat spreader 101 may partially or completely cover the first surface of the battery 104. The size of the heat spreader 101 may be larger or smaller than the size of the battery 104, or the size of the heat spreader 101 may be the same as the size of the battery 104. The specific size is not limited in this embodiment.

[0024] In some embodiments, the processing module 106 is further configured to, 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 a lower threshold, control the charging module 112 of the terminal device to charge the battery 104 of the terminal device according to a first charging current, wherein the first charging current corresponds to a first temperature range, the first temperature range being the temperature range containing the lowest temperature among the surface temperatures of the first surface and the second surface, 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, then the first temperature range is the temperature range containing the surface temperature of the first surface; if the temperature detection device 102 only detects the surface temperature of the second surface of the battery 104, then the first temperature range is the temperature range containing the surface temperature of the second surface; if the temperature detection device 102 simultaneously detects the surface temperatures of the first surface and the second surface of the battery 104, then the first temperature range is the temperature range containing the lower temperature among the surface temperatures of the first surface and the second surface.

[0025] In some embodiments, the processor 106 can 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 or second surface detected by the temperature detection device 102 is greater than or equal to the lower threshold. The second charging current corresponds to a second temperature range, which is the temperature range of the motherboard area of ​​the terminal device. In these embodiments, during the charging of the battery 104 according to the first charging current, the temperature of the battery 104 gradually increases due to the heating plate 101 heating the battery 104. To improve charging efficiency, the charging current can be adjusted according to the temperature of the motherboard area of ​​the terminal device when the surface temperature of the first or second surface is greater than or equal to the lower threshold.

[0026] In some embodiments, the processor 106 can also be used to reduce the power supply current of the heat spreader when the temperature difference between the surface of the first surface and the surface 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 value. In these embodiments, when the surface temperatures of the upper and lower surfaces of the battery 104 differ significantly and the surface temperature of one of the surfaces is also lower than the lower threshold value, the power supply current of the heat spreader can be reduced to reduce the temperature difference between the upper and lower surfaces of the battery 104.

[0027] In the embodiments of this application, the first set value can be determined by actual application. For example, the first set value can be set to 5 degrees.

[0028] In this embodiment, the heat spreader 101 can be a vacuum chamber heat spreader (VC).

[0029] In this embodiment, the heat spreader 101 can conduct heat to areas of the terminal device that generate significant heat, such as the processor and power management unit (PMU), during normal use. It can also transfer heat from the battery during charging, distributing the heat evenly to components such as the mid-frame / LCM, thereby reducing the temperature of the battery area.

[0030] In this embodiment, the temperature detection device 102 can perform round-trip detection of 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 conduct the electrical connection between the heat spreader 101 and the power supply terminal 107, thereby causing the heat spreader 101 to heat up and preheat the battery 103 to ensure that the battery temperature is not lower than the set lower limit threshold.

[0031] In this embodiment, the heat dissipation plate of the mid-frame insert generates heat at low temperatures, and the temperature of the battery is increased through heat transfer. As a result, the battery is kept at room temperature or a higher temperature during charging and discharging, which greatly improves the charging speed and discharging capacity, and further enhances the user experience.

[0032] In some embodiments, a first conductive point 1011 is provided on the first edge of the heat spreader 101, and a second conductive point 1012 is provided on the second edge of the heat spreader 101. The first edge and the second edge are opposite to each other. The heat spreader 101 is electrically connected to the on / off module 103 through the first conductive point 1011 and electrically connected to the housing 109 of the terminal device through the second conductive point 1012. The edges of the heat spreader 101, excluding the first and second conductive points, are fixed to the housing 109 by insulating material. In this embodiment, the housing 109 is a conductive housing, meaning that the housing 109 includes conductive material.

[0033] In this embodiment, the outer casing 109 may be a portion of the outer casing of the terminal device, for example, it may be the metal frame of the terminal device. Figure 3As shown, the first conductive point 1011 can be a metal spring or a metal surface, located at the upper end of the middle frame, and connected to the main board circuit of the terminal device through the metal spring or metal surface. The connection method can be through the spring or conductive foam. The switching module 103 can be located on the main board circuit and electrically connected to the spring or conductive foam through conductive components on the main board circuit. The second conductive point 1012 can be connected to the bottom metal middle frame 109 through conductive foam or conductive adhesive. The connection method can be through conductive foam or conductive cloth. The remaining positions of the edge of the heat spreader 101 can be bonded to the metal middle frame 109 with insulating adhesive. The first conductive point 1011 is connected to the power supply terminal, and the second conductive point 1012 is connected to the metal middle frame 109. The metal middle frame 109 is the common ground, thus forming a connection as shown in the diagram. Figure 4 The actual equivalent circuit model is shown.

[0034] In some embodiments, such as Figure 5 As shown, the terminal device may further include a selection module 110, which, under the control of the processor 105, selects either the power output terminal of the battery 104 as the power supply terminal 107 electrically connected to the heat spreader 101, or selects the power input terminal of the charging interface 108 as the power supply terminal 107 electrically connected to the heat spreader 101. In other words, in these embodiments, the selection module 110 can select either the battery 104 to power the heat spreader 101, or it can select the charging interface 108 to power the heat spreader 101, thereby enabling the heat spreader 101 to be powered by the charger when a charger is connected, reducing the power loss of the battery 104.

[0035] In some embodiments, the processor 106 may send a second control instruction to the gating module 110 when it is determined that a charger is connected. The second control instruction is used to control the gating module 110 to select the power input terminal of the charging interface as the power supply terminal electrically connected to the heat spreader. The gating module 110 selects the power input terminal of the charging interface 108 as the power supply terminal 107 based on the received second control instruction.

[0036] In the above embodiments, optionally, the processor 106 may also send a third control instruction to the gating module 110 when it is determined that the charger has been unplugged from the charging interface 108 of the terminal device. The third control instruction is used to control the gating module 110 to select the power output terminal of the battery 104 as the power supply terminal 107. The gating module 110 is also used to select the power output terminal of the battery 104 as the power supply terminal 107 based on the received third control signal.

[0037] In some embodiments, the processor 106 may send a third control instruction to the gating module 110 when no charger is detected, wherein the third control instruction is used to control the gating module 110 to select the power output terminal of the battery 104 as the power supply terminal 107; the gating 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.

[0038] Optionally, the processor 106 may send the third control command only after determining that the battery charge is greater than the second set value, thereby ensuring the standby time of the terminal device.

[0039] In some embodiments, the processor 106 is further configured to send a fourth control command when the surface temperature of the first or second surface exceeds an upper limit threshold. The fourth control command controls the on / off module 103 to disconnect the electrical connection between the heat spreader 101 and the power supply terminal 107. Through these embodiments, the power supply to the heat spreader 101 can be disconnected when the surface temperature of the battery 104 rises to the upper limit threshold, ensuring that the temperature of the battery 104 does not exceed the upper limit threshold, thereby saving energy.

[0040] In some embodiments, such as 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 disposed 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, i.e., the lower surface temperature. The second temperature sensor 1022 is disposed 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, i.e., the upper surface temperature.

[0041] 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 in the motherboard area 111 of the terminal device and is mainly used to detect the temperature of the motherboard area 111. The fourth temperature sensor 1024 is disposed in the battery protection board of the terminal device and is mainly used to detect the temperature rise of the protection board during charging.

[0042] It should be noted that the lower or upper threshold values ​​mentioned above in the embodiments of this application can be set according to actual applications, and are not limited in the specific embodiments of this application.

[0043] This application also provides a heating control method for the aforementioned terminal equipment. Figure 6 This document illustrates a flowchart of a heating control method provided in an embodiment of this application, as shown below. Figure 6As shown, the method 600 mainly includes the following steps.

[0044] S610, obtain the surface temperature of at least one of the first surface and the second surface of the battery of the terminal device.

[0045] For example, the surface temperature of at least one of the first and second surfaces of the battery can be obtained by the temperature detection device 102 described above.

[0046] S612, when the surface temperature of the first surface or the second surface is lower than the lower threshold, control the circuit between the heat spreader of the terminal device and the power supply terminal to be turned on, wherein the power supply terminal includes the power output terminal of the battery or the power input terminal of the charging interface of the terminal device.

[0047] In this embodiment, the surface temperature of the first surface or the second surface being lower than the lower threshold can mean that the surface temperature of the first surface is lower than the lower threshold, or the surface temperature of the second surface is lower than the lower threshold, or both the surface temperatures of the first surface and the second surface are lower than the lower threshold. In this case, it indicates 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 terminal is controlled to make the heat spreader heat up, thereby heating the battery, increasing the battery temperature, and thus improving the battery performance.

[0048] In some embodiments, the terminal device may poll the surface temperatures of the first and / or second surfaces of the battery to heat the battery in a timely manner when the upper and / or lower surface temperatures of the battery are below a lower threshold.

[0049] In some embodiments, the terminal device can also poll to detect whether a charger is connected. If 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. The first charging current corresponds to a first temperature range, which is the temperature range where the lowest temperature of the surface temperature of the first surface and the second surface is located. The lower the temperature range, the smaller the corresponding charging current.

[0050] Batteries may require different charging currents under different ambient temperatures. Taking an 80W charging power and a 5000mAh battery as an example, the corresponding charging currents in different temperature ranges are as follows:

[0051] 20~35°C CI1 (Maximum charging current: 2.8C)

[0052] 15~20°C CI2 (Maximum charging current: 2.0C)

[0053] 10~15°C CI3 (Maximum charging current: 1C)

[0054] 5~10°C CI4 (Maximum charging current: 0.5C)

[0055] 0~5°C CI5 (Maximum charging current: 0.1C)

[0056] -10~-0°C CI6 (minimum charging current, even 0)

[0057] The current relationship across different temperature ranges is: I1>I2>>I3>>I4>>I5>I6. This shows that when the battery temperature is 15 degrees Celsius or below, the charging speed is significantly slower and the charging time is longer. In practical applications, the charging current corresponding to each temperature range can be obtained based on the actual condition of the battery used in the terminal device.

[0058] In the above embodiment, during charging, the temperature sensor inside the terminal device detects that the temperature of the upper and lower surfaces of the battery is both below the set lower limit temperature T1, for example, below 15 degrees. At this time, the CPU sends a command to the on / off module to connect the heat spreader to the power supply terminal and supply power to the heat spreader. After the current flows through the heat spreader, heat is generated because the heat spreader is a conductor, which heats the battery and slowly raises its temperature. Otherwise, the heat spreader is not connected to the power supply terminal.

[0059] In some embodiments, if a charger is found to be connected to the terminal's charging port, the power input terminal of the charging port can be selected as the power supply terminal. That is, the heat spreader is powered by the charger, thereby saving battery power.

[0060] In some embodiments, after selecting the power input terminal of the charging interface as the power supply terminal, if it is detected that the charger has been unplugged from the terminal's charging interface, the power output terminal of the battery is selected as the power supply terminal to continue supplying power to the heat spreader. Alternatively, the heat spreader may not be supplied with power. Or, the decision to supply power to the heat spreader may be based on the current battery charge level. For example, if the current battery charge is sufficient and the battery surface temperature is low, the battery may be selected to supply power to the heat spreader.

[0061] In some embodiments, after the circuit between the heat spreader and the power supply terminal of the control terminal device is turned on, the surface temperature of the upper and lower surfaces of the battery can continue to be detected. If the surface temperature of the first surface and / or the second surface of the battery is higher than a first upper limit threshold, the circuit between the heat spreader and the power supply terminal is turned off, thereby preventing the battery temperature from becoming too high.

[0062] In some embodiments, after the circuit between the heat spreader and the power supply terminal of the terminal device is turned on, the upper and lower surface temperatures of the battery can continue to be detected. If the upper surface temperature and / or the lower surface temperature are both greater than or equal to the lower threshold, the charging module of the terminal device is controlled to charge the battery of the terminal device according to the second charging current. The second charging current corresponds to the second temperature range, which is the temperature range of the motherboard area of ​​the terminal device, thereby improving charging efficiency.

[0063] In some embodiments, after the circuit between the heat spreader and the power supply terminal of the control terminal device is turned on, the upper and lower surface temperatures of the battery can continue to be detected. If the temperature difference between the upper and lower surface temperatures is greater than a first set value and one of the surface temperatures is less than the lower threshold, the power supply current of the heat spreader is reduced, thereby reducing the heating 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 conditions for adjusting the charging current.

[0064] In some embodiments, if no charger is detected connected to the terminal's charging port, the battery's power output terminal is selected as the power supply terminal. Optionally, to ensure battery usage, if it is determined that the remaining battery power of the terminal is greater than a second preset value, the battery's power output terminal can be selected as the power supply terminal to power the heat spreader. The second preset value can be determined based on the battery's usable discharge capacity at the current ambient temperature. If the battery's usable time when heated by the heat spreader is greater than its usable time when not heated by the heat spreader, then the battery can be used to power the heat spreader.

[0065] If no charger is connected to the terminal's charging port and the remaining battery power of the terminal is greater than a second set value, and if the upper surface temperature and / or lower surface temperature of the battery is lower than a lower limit threshold (which may be different from the lower limit threshold when a charger is connected), the circuit between the heat spreader and the power supply terminal of the terminal device is turned on, and the battery is heated by the heat spreader to improve the battery's discharge performance.

[0066] The second setting can be a default value, such as 50% battery level, or it can be set by the user, such as 20% according to actual needs.

[0067] In some embodiments, by controlling the circuit between the heat spreader and the power supply terminal of the terminal device to be connected, the upper and lower surface temperatures of the battery can be continuously polled to obtain the upper surface temperature and / or lower surface temperature of the battery. If the upper surface temperature or the lower surface temperature is higher than the upper limit threshold, the circuit between the heat spreader and the power supply terminal is disconnected, thereby preventing the battery from overheating.

[0068] Figure 7 This illustration shows another schematic flowchart of the heating control method provided in an embodiment of this application, which can be applied to... Figures 1 to 5 The terminal device shown, such as Figure 7 As shown, the method mainly includes the following steps.

[0069] S701, during normal use of the terminal, the temperature detection device performs normal cycle testing;

[0070] S702, determine if a charger interface is connected. If yes, execute S703; otherwise, execute S712.

[0071] The S703 sets the temperature range according to the lowest value detected by the temperature detection device and matches the corresponding charging window to charge the terminal.

[0072] For example, under different ambient temperatures, taking a charging power of 80W and a battery capacity of 5000mAh as an example, the corresponding charging windows for the battery are as follows:

[0073] 20~35°C CI1 (Maximum charging current: 2.8C)

[0074] 15~20°C CI2 (Maximum charging current: 2.0C)

[0075] 10~15°C CI3 (Maximum charging current: 1C)

[0076] 5~10°C CI4 (Maximum charging current: 0.5C)

[0077] 0~5°C CI5 (Maximum charging current: 0.1C)

[0078] -10~-0°C CI6 (minimum charging current, even 0)

[0079] The current relationship in each temperature zone is as follows: I1>I2>>I3>>I4>>I5>I6 (when the battery temperature is 15 degrees or below, the charging speed is significantly slow and the charging time is long).

[0080] S704: Determine whether the temperature detection device inside the terminal has detected whether the temperature of the upper and lower areas of the battery is below the set lower limit temperature T1, such as 15 degrees. If yes, then execute S705; otherwise, return to S704 and continue to determine.

[0081] The S705 sends instructions from the CPU to the on / off module to connect the heat spreader to the power supply terminal and supply power to the heat spreader.

[0082] S706, current flows through the heat spreader. Since the heat spreader is a conductor, it generates heat to slowly heat the battery.

[0083] S707: Determine whether the temperature of the upper and lower surfaces of the battery is greater than the lower threshold T1 and whether the temperature difference between the upper and lower surfaces is less than the set value T0. If not, return to execute S705; if yes, execute S708.

[0084] S708 adjusts the charging current to the charging current within the current temperature window.

[0085] When the battery temperature is slowly heated, the charging current is still set to the current at the initial temperature because the temperature is fluctuating. When the temperature of both the upper and lower surfaces of the battery is detected to be above the lower limit temperature T1, such as above 15°C, the charging current is adjusted according to the battery temperature window and the motherboard area temperature. If the temperature difference between the upper and lower surfaces of the battery is greater than the set value T0, and the temperature of the lower surface of the battery is less than T1, the power supply current to the heat spreader is reduced to reduce bottom heating and prolong the heat transfer time, so that the upper and lower surface temperatures of the battery meet the conditions for adjusting the charging current.

[0086] S709: Determine whether either of the currently detected upper or lower surface temperatures of the battery has reached the set upper limit temperature T2, such as 35°C. If yes, execute S710; otherwise, return to S709 to continue the judgment.

[0087] The S710 uses a CPU to issue control commands to control the on / off module to disconnect the heat spreader from the power supply.

[0088] S711 stops supplying power to the heat spreader, which means stopping heating the battery. The battery temperature can be maintained by the heat generated during its own charging.

[0089] When the temperature detection device detects that the temperature of both the upper and lower surfaces of the battery is lower than the set lower limit T1 again, repeat the above steps S704 to S711.

[0090] S712, the fuel gauge module reports the current fuel level;

[0091] When the terminal is in a 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 polling detection, and the power meter module reports the current power status.

[0092] S714, determine whether the battery charge is greater than the set value A% (A is 0-100). If the battery state of charge (SOC) is >50%, then execute S715; otherwise, return to execute S714 and continue to determine.

[0093] S715, determine whether the average temperature of the upper and lower surfaces of the battery detected by the temperature detection device is less than the set temperature threshold T3. If so, execute S716; otherwise, return to execute S715 and continue to determine.

[0094] S716 sends control commands to the on / off module via the CPU to connect the heat sink to the power supply.

[0095] The S717 power supply provides power to the heat spreader. After the current flows through the heat spreader, it heats the battery. The battery heats up slowly, which can reduce the cell's direct current resistance (DCR), increase the battery's discharge capacity, and extend the battery's life.

[0096] S718, determine whether either of the temperatures of the upper and lower surfaces of the battery detected by the temperature detection device has risen to the upper limit temperature T4. If so, execute S719; otherwise, return to execute S78.

[0097] The S719 uses a CPU to issue control commands to control the on / off module to disconnect the heat spreader from the power supply.

[0098] S720 stops supplying power to the heat sink, which means it stops heating the battery. The battery temperature can be maintained by the heat generated during its own charging.

[0099] When the temperature detection device detects that the temperature of the upper and lower surfaces of the battery is lower than the set lower limit T3 again, repeat the above steps S712 to S720.

[0100] Through the technical solutions provided in the embodiments of this application, the heat dissipation plate of the mid-frame insert of the terminal device is connected to the on / off module. The on / off module energizes the heat dissipation plate, causing it to heat up. Through heat transfer, the temperature of the battery area is raised (to about room temperature). Thus, the battery is kept at room temperature or a higher temperature during charging and discharging, resulting in a significant improvement in charging speed and discharging capacity. This further enhances the user experience and reduces lithium plating caused by low-temperature cross-window charging of the battery cell, thereby reducing the safety risks of the battery cell.

[0101] Other components of the terminal device according to embodiments of the present invention, such as the motherboard and display, as well as its operation, are known to those skilled in the art and will not be described in detail here.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0103] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A terminal device, characterized by, The terminal device comprises: a heat plate, a temperature detection device, a on-off module, a battery, a battery back cover and a processor, wherein the heat plate is fixed on the shell of the terminal device and covers the first surface of the battery, and the heat plate can conduct heat to the processor and the power management unit during use; the on-off module is arranged between the heat plate and a power supply end, and is used for connecting or disconnecting the circuit between the heat plate and the power supply end, wherein the power supply end comprises 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 for detecting 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 the surface close to the battery back cover; the processor is used for sending 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 threshold, and the first control command is used for controlling the on-off module to turn on the electrical connection between the heat plate and the power supply end, so that the heat plate generates heat; the terminal device further comprises a gating module, which is used for selecting the power input end of the charging interface as the power supply end when it is determined that a charger is connected, and selecting the power output end of the battery as the power supply end when it is determined that the charger is disconnected from the charging interface of the terminal device.

2. The terminal device according to claim 1, characterized by A first conductive point is arranged on the first edge of the heat plate, and a second conductive point is arranged on the second edge of the heat plate, wherein the first edge is opposite to the second edge, the heat plate is electrically connected to the on-off module through the first conductive point and is electrically connected to the shell of the terminal device through the second conductive point, the heat plate is fixed on the shell through an insulating material at positions other than the first conductive point and the second conductive point, and the shell is a conductive shell.

3. The terminal device according to claim 1, characterized by The processor is further used for controlling 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 the 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 the lower threshold, wherein the first charging current corresponds to a first temperature range, the first temperature range is a temperature range in which 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 of claim 3, wherein the processor is further used for controlling 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 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 mainboard region of the terminal device is located.

5. The terminal device according to claim 3, characterized by The processor is further configured to reduce the 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 the surface temperature of the first surface or the second surface is less than the lower threshold.

6. The terminal device according to claim 3, characterized by The processor is further configured to send a second control instruction to the gating module 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 when detecting that a charger is connected to the charging interface of the terminal device. The gating module is configured to select the power input end of the charging interface as the power supply end electrically connected to the vapor chamber based on the received second control instruction.

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

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

9. The terminal device according to claim 7 or 8, characterized by 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 device is greater than a second set value.

10. The terminal device of any one of claims 1 to 8, wherein The processor is further configured to send a fourth control instruction when the surface temperature of the first surface or the second surface is higher than an upper threshold, the fourth control instruction being used to control the gating module to disconnect the electrical connection between the vapor chamber and the power supply end.

11. The terminal device according to any one of claims 1 to 8, characterized by, The temperature detection apparatus includes at least one of: a first temperature sensor arranged between the vapor chamber and the first surface of the battery; a second temperature sensor arranged between the second surface of the battery and the rear cover of the battery.

12. The terminal device according to claim 11, characterized by The temperature detection apparatus further includes: a third temperature sensor arranged in a mainboard region of the terminal device; a fourth temperature sensor arranged on a battery protection board of the terminal device.

Images