Electronic device

Abstract

The utility model relates to electronic equipment. The electronic equipment comprises a cooling fin; the battery and the cooling fins are arranged at intervals in the first direction; the thermoelectric device with the Peltier effect is arranged between the cooling fin and the battery, the thermoelectric device comprises a first electrode, a second electrode, a first end and a second end, the first end and the second end are oppositely arranged in the first direction, the first end faces the cooling fin, and the second end faces the battery. The control circuit is electrically connected with the first electrode and the second electrode, and the control circuit is used for controlling the current direction between the first electrode and the second electrode according to the temperature of the battery, so that heat is conducted between the first end and the second end; therefore, heat can be conducted from the first end to the second end to achieve a heating effect, or heat can be conducted from the second end to the first end to achieve a cooling effect, so that the effect of adjusting the temperature of the battery is achieved, and the temperature use range of the electronic equipment can be broadened.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic products, and in particular to an electronic device. Background Art

[0002] In the history of mobile phone battery development, the first commercially available mobile phone used nickel-cadmium batteries. While these batteries offered low cost and cyclical charging and discharging, they suffered from low capacity, bulk, weight, and a significant memory effect. They required a full charge and then a full discharge to maintain battery life. Subsequently, nickel-metal hydride batteries were introduced, offering advantages such as lighter weight, higher energy density, and reduced memory effect. However, they still suffered from rapid self-discharge, high heat generation, and deformation. Later, commercially available integrated lithium batteries were introduced. Their high energy density, lack of memory effect, and environmental friendliness made them a top choice for electronic products. They not only enabled a wide range of portable electronic products but also, more recently, fueled the emergence of electric vehicles. With decreasing costs, lithium-ion batteries have become a crucial technology for the information age and the pursuit of zero-emission living.

[0003] With the popularity of mobile phones, users in more and more countries and regions regard mobile phones as an indispensable part of their lives. Differences in geographical location and climate make temperature a major challenge for the normal operation of battery devices. Utility Model Content

[0004] The present disclosure provides an electronic device to solve the problems in the related art.

[0005] An embodiment of the present disclosure provides an electronic device, including:

[0006] heat sink;

[0007] A battery is spaced apart from the heat sink along a first direction;

[0008] a thermoelectric device having a Peltier effect, disposed between the heat sink and the battery, the thermoelectric device comprising a first electrode, a second electrode, and a first end and a second end disposed opposite to each other along the first direction, the first end facing the heat sink, and the second end facing the battery;

[0009] A control circuit is electrically connected to the first electrode and the second electrode respectively, and is used to control the direction of current between the first electrode and the second electrode according to the temperature of the battery so that heat is conducted between the first end and the second end.

[0010] Optionally, the thermoelectric device comprises:

[0011] a first substrate, attached to the heat sink, the first substrate having the first end;

[0012] a second substrate, attached to the battery, the second substrate having the second end;

[0013] A semiconductor thermoelectric structure with Peltier effect is arranged between the first substrate and the second substrate, and the semiconductor thermoelectric structure includes the first electrode and the second electrode.

[0014] Optionally, the semiconductor thermoelectric structure includes:

[0015] At least one N-type semiconductor and at least one P-type semiconductor are alternately arranged along a second direction to form at least one thermocouple, wherein the second direction is perpendicular to the first direction;

[0016] at least one first conductive layer and at least one second conductive layer, wherein one end of the N-type semiconductor and the P-type semiconductor along the first direction is connected to the first substrate through the first conductive layer, and the other end is connected to the second substrate through the second conductive layer;

[0017] Along the second direction, the first conductive layer connected to the N-type semiconductor is connected to the first conductive layer connected to the next P-type semiconductor, and the second conductive layer connected to the P-type semiconductor is connected to the second conductive layer connected to the next N-type semiconductor, so that the N-type semiconductor and the P-type semiconductor form at least one thermocouple;

[0018] Wherein, along the second direction, the first conductive layer or the second conductive layer located at the two ends are the first electrode and the second electrode.

[0019] Optionally, there are multiple N-type semiconductors and multiple P-type semiconductors, and the number is the same;

[0020] Along the second direction, the two first conductive layers located at the two extreme ends are the first electrode and the second electrode.

[0021] Optionally, the first conductive layer comprises a copper layer; and / or

[0022] The second conductive layer includes a copper layer.

[0023] Optionally, the first substrate and the second substrate both include: a body and a flexible insulating layer covering the outside of the body.

[0024] Optionally, the control circuit includes: a sensor resistor, a power management chip, a controller, a first switching device, and a second switching device;

[0025] The sensor resistor is electrically connected to the power management chip; the power management chip is electrically connected to the controller; the first switching device is electrically connected to the first electrode and electrically connected between the power management chip and the controller; the second switching device is electrically connected to the second electrode and electrically connected between the power management chip and the controller;

[0026] The sensor resistor is used to detect the temperature of the battery and generate temperature information to be sent to the power management chip;

[0027] The power management chip is used to send the temperature information to the controller;

[0028] The controller is configured to perform at least one of the following:

[0029] The controller is configured to control one of the first switching device and the second switching device to be turned on and the other to be turned off according to the temperature information, thereby controlling the direction of current between the first electrode and the second electrode;

[0030] The electronic device further includes a display screen electrically connected to the controller, the controller being configured to control the display screen to display an operation interface for user operation based on the temperature information, and to control one of the first switching device and the second switching device to be turned on and the other to be turned off in response to an operation instruction of the user, thereby controlling the direction of current between the first electrode and the second electrode;

[0031] The controller is configured to determine a fitted case temperature of the electronic device based on the temperature information, and control an output voltage of the power management chip based on the fitted case temperature, thereby controlling a current between the first electrode and the second electrode to adjust a rate of change of heat;

[0032] The controller is configured to control the first switch device to be turned on and the second switch device to be turned off when the temperature information is lower than a temperature threshold, so that heat is transferred from the first end to the second end;

[0033] The controller is configured to control the second switching device to be turned on and the first switching device to be turned off when the temperature information is higher than a temperature threshold, so that heat is transferred from the second end to the first end.

[0034] Optionally, the power management chip includes a first port, a second port, and a third port; the controller includes a fourth port, a fifth port, and a sixth port; the first switch device includes a first pin, a second pin, and a third pin; and the second switch device includes a fourth pin, a fifth pin, and a sixth pin;

[0035] One end of the sensor resistor is grounded, and the other end is connected to the first port; the second port is connected to the fourth port; the third port is connected to the first pin and the fourth pin respectively; the fifth port is connected to the second pin; the sixth port is connected to the fifth pin; the third pin is connected to the first ground resistor, and the sixth pin is connected to the second ground resistor; the first electrode is connected between the third pin and the first ground resistor; and the second electrode is electrically connected between the sixth pin and the second ground resistor.

[0036] Optionally, the sensor resistor comprises an NTC thermistor; and / or

[0037] The controller includes an application processor; and / or

[0038] The first switching device includes a MOS transistor; and / or

[0039] The second switching device includes a MOS transistor.

[0040] Optionally, the heat sink comprises a vacuum chamber heat sink; and / or

[0041] The battery includes a lithium battery.

[0042] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0043] As can be seen from the above embodiments, the electronic device disclosed in the present invention, by arranging a thermoelectric device with a Peltier effect between a heat sink and a battery, controls the direction of current between the first electrode and the second electrode of the thermoelectric device according to the temperature of the battery through a control circuit, so that heat is conducted between the first end and the second end. Heat can be conducted from the first end to the second end to achieve a heating effect, or heat can be conducted from the second end to the first end to achieve a cooling effect, thereby achieving the effect of regulating the battery temperature, which can further improve the temperature operating range of the electronic device.

[0044] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0046] Figure 1 It is a schematic structural diagram of an electronic device according to an exemplary embodiment.

[0047] Figure 2 and Figure 3The figure is a schematic diagram showing the working principle of an electronic device according to an exemplary embodiment.

[0048] Figure 4 The figure is a logic diagram of a control circuit of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0049] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0050] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0051] Currently, mainstream mobile phone lithium batteries generally operate within a temperature range of -20-60°C, and the battery stops charging below -10°C. The reason for protecting lithium batteries from cold charging and discharging is that low temperatures increase the viscosity of the electrolyte, hindering the transfer of lithium ions between the positive and negative electrodes. During charging, lithium ions are difficult to embed into the graphite layer, and instead directly receive electrons on the negative electrode surface and are converted into metallic lithium, forming lithium dendrites. The growth of lithium dendrites can pierce the separator inside the battery, causing direct connection between the positive and negative electrodes and an internal short circuit.

[0052] In addition, when discharging under low temperature conditions, the lattice that shrinks at low temperatures is strongly embedded by lithium ions, which can easily cause local lattice damage inside the positive and negative electrode materials. Irreversible structural damage to the materials inside the battery and permanent loss of active substances (especially circulating lithium) occur, resulting in a decrease in battery life and limiting the current usage conditions of mobile phones.

[0053] In related technologies, in order to solve the problem of limited charging and discharging of mobile phone batteries at low temperatures, the following solutions are currently commonly used:

[0054] ① Material system replacement: mainly includes three types of solutions: carrier ion replacement (sodium ion batteries, aqueous zinc ion batteries, etc.), electrode surface modification, and electrolyte replacement. The carrier ion replacement method mainly uses carrier compounds and carrier salt solutions that are more stable and have higher mobility at low temperatures to replace mainstream lithium ions and broaden the normal operating temperature range. The electrode surface modification method mainly uses solid electrolyte materials doped or deposited on the electrode surface to inhibit the precipitation process of lithium ions and slow down the formation of lithium dendrites. The electrolyte replacement method mainly replaces the liquid electrolyte with a solid electrolyte material to solve the problem of low-temperature electrolyte becoming viscous and reduced mobility.

[0055] ② Battery preheating: Artificially elevating the battery temperature to within the normal operating range, allowing users to use it with normal charge and discharge currents. This primarily involves resistor wire preheating, motherboard heat conduction, and battery discharge heating. Resistor wire heating involves adding an external heating device attached to the battery surface. Current flowing through the resistor wire generates heat, raising the battery's temperature. Motherboard heat conduction involves heating the motherboard's CPU or GPU under a certain load, which is then transferred to the battery, raising its temperature. Battery discharge heating is similar to the previous two methods, allowing the battery to discharge at low power at low temperatures, generating its own heat.

[0056] However, the material system replacement solution has a long development cycle. Currently, low-temperature-resistant battery systems currently lag significantly behind lithium-ion battery systems in energy density and cycle life, leading to high manufacturing costs. The heating device attached to the battery preheating solution is relatively simple, lacking any additional functions beyond heating. Furthermore, the heat conduction heating method is not as effective as heating the battery itself, resulting in some heat loss.

[0057] Based on the above problems, the present disclosure provides an electronic device to solve the problems in the related art. To facilitate understanding of the technical solution of the present disclosure, the electronic device of the present disclosure is described in detail below with reference to the accompanying drawings. The features of the following embodiments and implementations may be combined with each other unless they conflict.

[0058] See also Figure 1 As shown, an embodiment of the present disclosure provides an electronic device 100, which may be an electronic product such as a mobile phone or a tablet computer. The electronic device 100 may include: a display screen 90, a main board 80, a small board 70, a graphite sheet 60, a heat sink 10, a battery 20, a thermoelectric device 30 with a Peltier effect, and a control circuit. The Peltier effect refers to the phenomenon that when a current passes through a loop composed of different conductors, in addition to generating irreversible Joule heat, heat absorption and heat release will occur at the joints of different conductors depending on the direction of the current. Optionally, the heat sink 10 may include a VC (vacuum chamber heat sink technology, Vapor Chamber) heat sink. The battery 20 may include a lithium battery 20.

[0059] The display screen 90 is provided on the front of the electronic device. The graphite sheet 60 is provided on the back of the electronic device. The battery 20 and the heat sink 10 are spaced apart along the first direction X. The main board 80 and the small board 70 are respectively located on both sides of the battery 20. The thermoelectric device 30 is provided between the heat sink 10 and the battery 20. The thermoelectric device 30 includes a first electrode, a second electrode, and a first end and a second end oppositely arranged along the first direction X, wherein the first end faces the heat sink 10 and the second end faces the battery 20. The control circuit is electrically connected to the first electrode and the second electrode respectively. The control circuit is used to control the direction of the current between the first electrode and the second electrode according to the temperature of the battery 20 so that heat is conducted between the first end and the second end. The heat can be conducted from the first end to the second end to achieve a heating effect on the battery, or the heat can be conducted from the second end to the first end to achieve a heat dissipation and cooling effect on the battery, thereby achieving the effect of regulating the battery temperature and improving the temperature operating range of the electronic device.

[0060] For example, when an electronic device is in a relatively cold environment (temperature greater than or equal to -20°C) and the user uses it or needs to charge it, the control circuit controls the direction of the current between the first electrode and the second electrode, so that heat is transferred from the first end to the second end to achieve a heating effect on the battery, so that the battery is in a suitable operating temperature range, and the upper limit of the discharge current or charging current is increased.

[0061] In high-power consumption scenarios such as gaming or video calls, since the battery and motherboard installation areas are adjacent, the higher motherboard temperature will limit the charging current, causing the screen to light up and charging to slow down. At this time, auxiliary heat dissipation is required to reduce the temperature of the motherboard and battery area. The control circuit controls the current direction between the first electrode and the second electrode, so that the heat is transferred from the second end to the first end to achieve a heat dissipation effect on the battery. The charging current is appropriately increased to accelerate charging and improve the experience of charging while using.

[0062] See also Figure 2 and Figure 3 As shown, in some optional embodiments, the thermoelectric device 30 includes a first substrate 31, a second substrate 32, and a semiconductor thermoelectric structure with a Peltier effect. The first substrate 31 is attached to the heat sink 10, and the first substrate 31 has a first end facing the heat sink 10. The second substrate 32 is attached to the battery 20, and the second substrate 32 has a second end facing the battery 20. The semiconductor thermoelectric structure is arranged between the first substrate 31 and the second substrate 32, and the semiconductor thermoelectric structure includes the first electrode and the second electrode. The use of a semiconductor thermoelectric structure has low power consumption and a fast heating / cooling rate, allowing the mobile phone to enter a normal temperature state more quickly.

[0063] Optionally, both the first substrate 31 and the second substrate 32 may include a body and a flexible insulating layer coated on the outside of the body. The outside of the body may be coated with a flexible insulating layer such as PVDF (polyvinylidene fluoride) or PET (thermoplastic polyester, or saturated polyester) by a casting or spin coating process. The use of flexible materials can strengthen the adhesion between the first substrate 31 and the heat sink 10, and the second substrate 32 and the battery 20, and reduce stress. It is understandable that the heat sink 10, the thermoelectric device 30, and the battery 20 are bonded to form a sandwich structure. The direct contact bonding method can make the heating efficiency higher and the waiting time required for heating shorter.

[0064] When the battery needs to be heated, the control circuit controls the direction of the current between the first electrode and the second electrode so that the heat is transferred from the first substrate 31 to the second substrate 32, thereby heating the battery and keeping the battery in a suitable operating temperature range.

[0065] When the battery needs to be cooled, the control circuit controls the direction of the current between the first electrode and the second electrode so that the heat is transferred from the second thermal substrate 32 to the first substrate 31, thereby achieving a cooling effect on the battery.

[0066] In some optional embodiments, the semiconductor thermoelectric structure includes at least one N-type semiconductor (denoted by N in the figure), at least one P-type semiconductor (denoted by P in the figure), at least one first conductive layer 33 and at least one second conductive layer 34.

[0067] The N-type semiconductors and the P-type semiconductors are alternately arranged along a second direction Y, which is perpendicular to the first direction X. One end of the N-type semiconductors and the P-type semiconductors along the first direction X is connected to the first substrate 31 through the first conductive layer 33 , and the other end is connected to the second substrate 32 through the second conductive layer 34 .

[0068] Along the second direction Y, the first conductive layer 33 connected to the N-type semiconductor is connected to the first conductive layer 33 connected to the next P-type semiconductor, and the second conductive layer 34 connected to the P-type semiconductor is connected to the second conductive layer 34 connected to the next N-type semiconductor, so that the N-type semiconductor and the P-type semiconductor form at least one thermocouple. In the second direction Y, the first conductive layer 33 or the second conductive layer 34 at the two ends are the first electrode and the second electrode. In the figure, the first electrode is located on the left and the second electrode is located on the right as an example. It can be understood that the N-type semiconductor, the P-type semiconductor, the first conductive layer 33, and the second conductive layer 34 form a square wave-like arrangement structure, forming at least one thermocouple.

[0069] Optionally, the first conductive layer 33 and the second conductive layer 34 may include a copper layer, or other conductive materials such as a silver layer, and may be provided by a screen printing process.

[0070] like Figure 2 As shown, when the environment is cold and the battery needs to be heated, the control circuit passes a positive voltage on the left and a negative voltage on the right to the semiconductor thermoelectric structure. Electrons flow from the P-type semiconductor to the N-type semiconductor, which needs to absorb energy, causing the first substrate 31 to absorb heat and the second substrate 32 to release heat. At this time, heat is conducted from one side of the first substrate 31 to the other side of the second substrate 32, achieving a heating effect on the battery and achieving an auxiliary heating effect.

[0071] like Figure 3 As shown, when the battery needs to be cooled, the control circuit passes a negative voltage on the left and a positive voltage on the right to the semiconductor thermoelectric structure. Electrons flow from the N-type semiconductor to the P-type semiconductor, and energy needs to be released, so that the first substrate 31 releases heat and the second substrate 32 absorbs heat. At this time, the heat is transferred from one side of the second substrate 32 to the side of the first substrate 31, achieving a heat dissipation and cooling effect on the battery, and can cool the battery and the motherboard.

[0072] Thus, the electronic device of this embodiment utilizes a semiconductor thermocouple pair with the Peltier effect as its foundation. Currents flowing in different directions between a first electrode and a second electrode cause carrier energy level conversion on different surfaces of the electrodes to achieve heating or cooling. This provides auxiliary heating and cooling functions in extreme cold, normal temperature, and hot weather. This addresses the issue of mobile phone batteries limiting charging current or even stopping charging to protect the battery in low-temperature environments, limiting their use in some cold regions.

[0073] In this embodiment, the N-type semiconductor and the P-type semiconductor are both multiple and equal in number. Along the second direction Y, the two first conductive layers 33 at the two ends serve as the first electrode and the second electrode, respectively. It is understood that the first conductive layer 33 on the left side serves as the first electrode, and the first conductive layer 33 on the right side serves as the second electrode.

[0074] See also Figure 4As shown, in some optional embodiments, the control circuit can be set on the mainboard and include: a sensor resistor 41, a power management chip (PMIC) 42, a controller 43, a first switch device G1, and a second switch device G2. Optionally, the sensor resistor 41 includes an NTC thermistor (Negative Temperature Coefficient). The controller 43 includes an application processor (AP). The first switch device G1 includes a MOS transistor, and the second switch device G2 includes a MOS transistor.

[0075] The sensor resistor 41 is electrically connected to the power management chip 42. The power management chip 42 can be electrically connected to the controller 43 via an I2C (Integrated Circuit Bus). The first switching device G1 is electrically connected to the first electrode and electrically connected between the power management chip 42 and the controller 43. The second switching device G2 is electrically connected to the second electrode and electrically connected between the power management chip 42 and the controller 43.

[0076] The sensor resistors 41 may be multiple and distributed at various locations to detect the temperature of the battery 20 and generate temperature information to send to the power management chip 42 . The power management chip 42 is used to send the temperature information to the controller 43 .

[0077] The controller 43 is configured to perform at least one of the following:

[0078] The controller 43 is configured to control one of the first switching device G1 and the second switching device G2 to be turned on and the other to be turned off according to the temperature information, thereby controlling the direction of current between the first electrode and the second electrode.

[0079] The controller 43 is electrically connected to the display screen 90. The controller 43 is used to control the display screen to display an operation interface for user operation based on the temperature information, and to control one of the first switching device G1 and the second switching device G2 to open and the other to close in response to the user's operation instructions, thereby controlling the current direction between the first electrode and the second electrode.

[0080] The controller 43 is used to determine the fitted case temperature of the electronic device according to the temperature information, and control the output voltage of the power management chip 42 according to the fitted case temperature, thereby controlling the current between the first electrode and the second electrode to adjust the rate of change of heat.

[0081] The controller 43 is configured to control the first switch device G1 to turn on and the second switch device G2 to turn off when the temperature information is lower than a temperature threshold, so that electrons flow from the P-type semiconductor to the N-type semiconductor, thereby transferring heat from the first end to the second end.

[0082] The controller 43 is configured to control the second switch device G2 to turn on and the first switch device G1 to turn off when the temperature information is higher than a temperature threshold, so that electrons flow from the N-type semiconductor to the P-type semiconductor, thereby transferring heat from the second end to the first end.

[0083] In this way, the controller 43 can control the battery temperature to increase or decrease according to the battery temperature in different usage scenarios.

[0084] Specifically, if Figure 4 As shown, the power management chip 42 includes a first port a, a second port b, and a third port c, and the controller 43 includes a fourth port d, a fifth port e, and a sixth port f. The first switching device G1 includes a first pin g, a second pin h, and a third pin i, and the second switching device G2 includes a fourth pin j, a fifth pin k, and a sixth pin l. The first and second switching devices G1 and G2 are MOS switches, with the first pin g being the drain, the second pin h being the gate, and the third pin i being the source. The fourth pin j is the drain, the fifth pin k is the gate, and the sixth pin l is the source.

[0085] One end of the sensor resistor 41 is grounded, and the other end is connected to the first port a. The second port b is connected to the fourth port d. The third port c is connected to the first pin g and the fourth pin j, respectively. The fifth port e is connected to the second pin h, and the sixth port f is connected to the fifth pin k. The third pin i is connected to the first ground resistor 44, and the sixth pin l is connected to the second ground resistor 45. The first electrode V+ is connected between the third pin i and the first ground resistor. The second electrode V- is electrically connected between the sixth pin l and the second ground resistor.

[0086] Through the above technical solution, the temperature information of the battery is collected by each NTC thermistor, and the fitting shell temperature is calculated by the ADC (analog-to-digital converter) of the power management chip 42 or the controller 43, and reported to the controller 43. The controller 43 determines that the current temperature of the battery is less than the set temperature threshold, that is, the normal working range, and then a pop-up window is displayed on the UI interface of the display screen to let the user choose whether to turn on the auxiliary heating function. If it is turned on, the first switch device G1 or the second switch device G2 is turned on according to the corresponding positive and negative voltage relationship. (In Figure 4In this embodiment, heating activates the first switching device G1 and deactivates the second switching device G2, while cooling deactivates the first switching device G1 and deactivates the second switching device G2. A voltage is output from the power management chip 42 at one end of the MOS transistor. If the MOS transistor is off, the electrode connected to the thermoelectric device is grounded; if it is on, the voltage is high, ultimately achieving control in different scenarios. Furthermore, the controller 43 can also adjust the output voltage Vout of the power management chip 42 by using the real-time calculated fitted case temperature to regulate the rate of heat change, thereby informing the heating rate, cooling rate, and temperature maintenance.

[0087] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. An electronic device, characterized in that: include: heat sink; A battery is spaced apart from the heat sink along a first direction; a thermoelectric device having a Peltier effect, disposed between the heat sink and the battery, the thermoelectric device comprising a first electrode, a second electrode, and a first end and a second end disposed opposite to each other along the first direction, the first end facing the heat sink, and the second end facing the battery; A control circuit is electrically connected to the first electrode and the second electrode respectively, and is used to control the direction of current between the first electrode and the second electrode according to the temperature of the battery so that heat is conducted between the first end and the second end.

2. The electronic device according to claim 1, wherein The thermoelectric device comprises: a first substrate, attached to the heat sink, the first substrate having the first end; a second substrate, attached to the battery, the second substrate having the second end; A semiconductor thermoelectric structure with Peltier effect is arranged between the first substrate and the second substrate, and the semiconductor thermoelectric structure includes the first electrode and the second electrode.

3. The electronic device according to claim 2, wherein: The semiconductor thermoelectric structure comprises: At least one N-type semiconductor and at least one P-type semiconductor are alternately arranged along a second direction, wherein the second direction is perpendicular to the first direction; at least one first conductive layer and at least one second conductive layer, wherein one end of the N-type semiconductor and the P-type semiconductor along the first direction is connected to the first substrate through the first conductive layer, and the other end is connected to the second substrate through the second conductive layer; Along the second direction, the first conductive layer connected to the N-type semiconductor is connected to the first conductive layer connected to the next P-type semiconductor, and the second conductive layer connected to the P-type semiconductor is connected to the second conductive layer connected to the next N-type semiconductor, so that the N-type semiconductor and the P-type semiconductor form at least one thermocouple; Wherein, along the second direction, the first conductive layer or the second conductive layer located at the two ends are the first electrode and the second electrode.

4. The electronic device according to claim 3, wherein: There are multiple N-type semiconductors and multiple P-type semiconductors, and the number is the same; Along the second direction, the two first conductive layers located at the two extreme ends are the first electrode and the second electrode.

5. The electronic device according to claim 3, wherein: The first conductive layer comprises a copper layer; and / or The second conductive layer includes a copper layer.

6. The electronic device according to claim 2, wherein: The first substrate and the second substrate each include a body and a flexible insulating layer covering the outside of the body.

7. The electronic device according to claim 1, wherein: The control circuit includes: a sensor resistor, a power management chip, a controller, a first switching device and a second switching device; The sensor resistor is electrically connected to the power management chip; the power management chip is electrically connected to the controller; the first switching device is electrically connected to the first electrode and electrically connected between the power management chip and the controller; the second switching device is electrically connected to the second electrode and electrically connected between the power management chip and the controller; The sensor resistor is used to detect the temperature of the battery and generate temperature information to be sent to the power management chip; The power management chip is used to send the temperature information to the controller; The controller is configured to perform at least one of the following: The controller is configured to control one of the first switching device and the second switching device to be turned on and the other to be turned off according to the temperature information, thereby controlling the direction of current between the first electrode and the second electrode; The electronic device further includes a display screen electrically connected to the controller, the controller being configured to control the display screen to display an operation interface for user operation based on the temperature information, and to control one of the first switching device and the second switching device to be turned on and the other to be turned off in response to an operation instruction of the user, thereby controlling the direction of current between the first electrode and the second electrode; The controller is configured to determine a fitted case temperature of the electronic device based on the temperature information, and control an output voltage of the power management chip based on the fitted case temperature, thereby controlling a current between the first electrode and the second electrode to adjust a rate of change of heat; The controller is configured to control the first switch device to be turned on and the second switch device to be turned off when the temperature information is lower than a temperature threshold, so that heat is transferred from the first end to the second end; The controller is configured to control the second switching device to be turned on and the first switching device to be turned off when the temperature information is higher than a temperature threshold, so that heat is transferred from the second end to the first end.

8. The electronic device according to claim 7, wherein: The power management chip includes a first port, a second port, and a third port, and the controller includes a fourth port, a fifth port, and a sixth port; the first switch device includes a first pin, a second pin, and a third pin, and the second switch device includes a fourth pin, a fifth pin, and a sixth pin; One end of the sensor resistor is grounded, and the other end is connected to the first port; the second port is connected to the fourth port; the third port is connected to the first pin and the fourth pin respectively; the fifth port is connected to the second pin; the sixth port is connected to the fifth pin; the third pin is connected to the first ground resistor, and the sixth pin is connected to the second ground resistor; the first electrode is connected between the third pin and the first ground resistor; and the second electrode is electrically connected between the sixth pin and the second ground resistor.

9. The electronic device according to claim 7, wherein: The sensor resistor comprises an NTC thermistor; and / or The controller includes an application processor; and / or The first switching device includes a MOS transistor; and / or The second switching device includes a MOS transistor.

10. The electronic device according to claim 1, wherein The heat sink comprises a vacuum chamber heat sink; and / or The battery includes a lithium battery.

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