Charging interface and electronic device

Abstract

The application discloses a charging interface and an electronic device. The charging interface comprises an electro-deformation mechanism, a charging terminal is arranged on the electro-deformation mechanism, and the electro-deformation mechanism can be converted between a first state and a second state with voltage change; a thermistor is electrically connected with the electro-deformation mechanism and used for adjusting voltage at both ends of the electro-deformation mechanism, and the resistance of the thermistor changes with temperature change of the charging interface; when the temperature of the charging interface is lower than a preset temperature, the resistance of the thermistor is within a first preset range, the electro-deformation mechanism is in the first state, the charging terminal is electrically connected with an external charging connector to charge the electronic device; and when the temperature of the charging interface is higher than the preset temperature, the resistance of the thermistor is within a second preset range, the electro-deformation mechanism is in the second state, and the charging terminal is disconnected with the external charging connector.

Description

Technical Field

[0001] This application belongs to the field of electronic device technology, specifically relating to a charging interface and an electronic device. Background Technology

[0002] With the continuous development of electronic devices, battery capacity has gradually increased, accompanied by a corresponding increase in charging current. However, current electronic devices use USB (Universal Serial Bus) Type-B or Type-C grounding. Under high current conditions, the charging interface is prone to overheating, causing damage to the charging interface and electronic device, and even posing a fire hazard to users' personal safety and property. Summary of the Invention

[0003] This application aims to provide a charging interface and an electronic device to solve the safety problem caused by overheating of the charging interface of the electronic device.

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

[0005] In a first aspect, embodiments of this application provide a charging interface, including:

[0006] An electro-deformation mechanism is provided with a charging terminal, and the electro-deformation mechanism can switch between a first state and a second state as the voltage changes;

[0007] A thermistor, electrically connected to the electro-deformation mechanism, is used to adjust the voltage across the electro-deformation mechanism. The resistance of the thermistor changes with the temperature of the charging interface.

[0008] When the temperature of the charging interface is lower than the preset temperature, the resistance of the thermistor is within the first preset range, the electro-deformation mechanism is in the first state, and the charging terminal and the external charging connector are electrically connected to charge the electronic device.

[0009] When the temperature of the charging interface is higher than the preset temperature, the resistance value of the thermistor is within the second preset range, the electro-deformation mechanism is in the second state, and the charging terminal and the external charging connector are disconnected.

[0010] Secondly, embodiments of this application propose an electronic device that includes the aforementioned charging interface.

[0011] In the embodiments of this application, an electro-deformation mechanism with two forms is provided in the charging interface to drive the charging terminal. A thermistor is electrically connected to the electro-deformation mechanism. When the temperature of the charging interface is lower than a preset temperature, the resistance of the thermistor is within a first preset range, the electro-deformation mechanism is in a first state, and the charging terminal and external charging connector are electrically connected to charge the electronic device. When the temperature of the charging interface is higher than the preset temperature, the resistance of the thermistor is within a second preset range, the electro-deformation mechanism is in a second state, and the charging terminal and external charging connector are disconnected. This ensures the temperature inside the charging interface, improves the safety of the charging interface, and guarantees a better user experience.

[0012] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is a schematic diagram of the internal structure of a charging interface in a first state according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the internal structure of a charging interface in a second state according to an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the external structure of a charging interface in a first state according to an embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the external structure of a charging interface in a second state according to an embodiment of this application;

[0018] Figure 5 This is a schematic diagram of a charging interface provided according to an embodiment of this application;

[0019] Figure 6 This is a schematic diagram of the external structure of a charging interface in a first state according to another embodiment of this application;

[0020] Figure 7 This is a schematic diagram of the external structure of a charging interface in a second state according to another embodiment of this application;

[0021] Figure 8 This is a circuit diagram of a charging interface provided according to an embodiment of this application;

[0022] Figure 9 This is a circuit diagram of a charging interface provided according to another embodiment of this application;

[0023] Figure label:

[0024] 1. Electro-deformation mechanism; 11. Charging terminal; 111. Charging pin; 112. Grounding pin; 12. Piezoelectric structure; 13. Insulating layer; 14. Protector; 15. PMIC chip; 16. Charging chip; 17. MOSFET; 2. Thermistor; 3. Interface body; 4. Sealing plate; 5. External resistor. Detailed Implementation

[0025] The embodiments of this application 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 this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] 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 application, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] The following is combined Figures 1 to 4 The charging interface proposed according to the embodiments of this application can be a charging interface on devices such as mobile phones, tablets, computers, and electronic watches, and can be set as a USB interface, a Type-B interface, or a Type-C interface according to actual needs.

[0029] The charging interface includes an interface body 3 and an electro-deformation mechanism 1 and a thermistor 2 disposed within the interface body 3. The interface body 3 serves as a metal casing for the charging interface, protecting the components within. The electro-deformation mechanism 1 has a charging terminal 11, which is a metal wire or a thin sheet. The electro-deformation mechanism 1 can switch between a first state and a second state as the voltage changes, controlling the position of the charging terminal 11 during the state transition. The thermistor 2 is electrically connected to the electro-deformation mechanism 1 and is used to adjust the voltage across the electro-deformation mechanism 1. The resistance of the thermistor 2 changes with the temperature of the charging interface. Thermistor 2 can be connected in series or in parallel with the electro-deformation mechanism 1 as needed.

[0030] Depending on user needs, the thermistor 2 can be disposed inside or outside the interface body 3. The thermistor 2 is used to sense the temperature inside the charging interface. In this embodiment, one end of the thermistor 2 is electrically connected to the electro-deformation mechanism 1, and the other end of the thermistor 2 is electrically connected to the interface body 3, which is grounded.

[0031] When the temperature of the charging interface is lower than a preset temperature, the resistance of thermistor 2 remains within a first preset range, for example, when the temperature of the charging interface is below 150 degrees Celsius. Figure 1 and Figure 3 As shown, with the change in resistance of the thermistor 2, the voltage on the electro-deformation mechanism 1 changes, and the electro-deformation mechanism 1 switches to the first state. In this embodiment, the first state of the electro-deformation mechanism 1 is the extended state. In this state, the electro-deformation mechanism 1 drives the charging terminal 11 to be electrically connected to the external charging connector (external data cable) and controls the external charging connector to charge the electronic device.

[0032] When the temperature of the charging interface is higher than the preset temperature, the resistance of thermistor 2 will be within the second preset range, for example, when the temperature reaches 150 degrees Celsius or above. Figure 2 and Figure 4 As shown, with the change in resistance of the thermistor 2, the voltage on the electro-deformation mechanism 1 changes, and the electro-deformation mechanism 1 switches to the second state. In this embodiment, the second state of the electro-deformation mechanism 1 is the contracted state. The electro-deformation mechanism 1 drives the charging terminal 11 to disconnect from the external charging connector (external data line), controls the external charging connector to stop charging the electronic device, and avoids short circuit at the charging interface.

[0033] The charging interface provided in this application drives the charging terminal by incorporating an electro-deformation mechanism with two different configurations. A thermistor is electrically connected to the electro-deformation mechanism. When the temperature of the charging interface is below a preset temperature, the resistance of the thermistor is within a first preset range, the electro-deformation mechanism is in a first state, and the charging terminal and external charging connector are electrically connected to charge the electronic device. When the temperature of the charging interface is above the preset temperature, the resistance of the thermistor is within a second preset range, the electro-deformation mechanism is in a second state, and the charging terminal and external charging connector are disconnected. This ensures the temperature within the charging interface, improves the safety of the charging interface, and guarantees a better user experience.

[0034] Based on the above embodiments, in one embodiment, such as Figures 1 to 4 As shown, the electro-deformation mechanism 1 includes a piezoelectric structure 12.

[0035] Depending on the actual situation, the piezoelectric structure 12 can be made of positive piezoelectric material or inverse piezoelectric material. As the voltage across the piezoelectric structure 12 changes, the piezoelectric structure 12 can switch between a contracted state and an extended state. The piezoelectric structure 12 is electrically connected to the thermistor 2. The charging terminal 11 is disposed on the piezoelectric structure 12.

[0036] like Figure 1 and Figure 3 As shown, when the piezoelectric structure 12 is in its extended state, the piezoelectric structure 12 extends upwards, and the piezoelectric structure 12 drives the charging terminal 11 to electrically connect the external charging connector and the charging circuit. Figure 2 and Figure 4 As shown, when the piezoelectric structure 12 is in the contracted state, the piezoelectric structure 12 contracts downward, and the piezoelectric structure 12 drives the charging terminal 11 to disconnect the external charging connector and the charging circuit.

[0037] Based on the above embodiments, such as Figures 1 to 5 As shown, the charging interface also includes a charging circuit, which is used to adjust the input voltage. To facilitate control of the piezoelectric structure 12 during charging, the charging circuit is electrically connected to the piezoelectric structure 12.

[0038] The charging terminal 11 includes a charging pin 111 and a grounding pin 112. The charging pin 111 is used to charge the electronic device, and the grounding pin 112 is used for grounding to ensure the safety of the electronic device during charging. Both the charging pin 111 and the grounding pin 112 are disposed on the piezoelectric structure 12.

[0039] like Figure 1 and Figure 3As shown, when the temperature of the charging interface is lower than the preset temperature, the resistance of the thermistor 2 is within the first preset range. For example, when the temperature is below 150 degrees Celsius, the resistance of the thermistor 2 is relatively large. Since the voltage drop across the piezoelectric structure 12 is low, the piezoelectric structure 12 is in an extended state. In this state, the piezoelectric structure 12 drives the charging pin 111 to connect the charging circuit and the power supply terminal (charging terminal of the external data line) of the external charging connector. The piezoelectric structure 12 drives the grounding pin 112 to connect the grounding terminal (grounding terminal of the external data line) of the external charging connector to the ground wire, thereby controlling the external charging connector to charge the electronic device.

[0040] like Figure 2 and Figure 4 As shown, when the temperature of the charging interface is higher than the preset temperature, the resistance of thermistor 2 is within the second preset range, for example, when the temperature reaches 150 degrees Celsius or above. Figure 2 and Figure 4 As shown, the resistance of the thermistor 2 decreases. Since the impedance of the piezoelectric structure 12 remains almost unchanged, the voltage drop across the piezoelectric structure 12 increases, and the piezoelectric structure 12 generates the inverse piezoelectric effect. At this time, the piezoelectric structure 12 is in a contracted state. The piezoelectric structure 12 drives the charging pin 111 to disconnect the charging circuit and the feed terminal of the external charging connector. The piezoelectric structure 12 drives the grounding pin to disconnect the grounding terminal and ground wire of the external charging connector, thereby controlling the external charging connector to stop charging the electronic device and avoiding a short circuit at the charging interface.

[0041] Depending on user requirements, the piezoelectric structure 12 can be extended or retracted in the vertical or horizontal direction.

[0042] If the piezoelectric structure 12 is selected to be telescopically extended in the vertical direction, such as Figures 1 to 4 As shown, the piezoelectric structure 12 adjusts the positions of the charging pin 111 and the ground pin 112 in the vertical direction. Figure 1 and Figure 3 As shown, in the extended state, the piezoelectric structure 12 drives the charging pin 111 and the grounding pin 112 to move upward, thereby controlling the charging pin 111 to connect the charging circuit and the power supply terminal of the external charging connector, and driving the grounding pin 112 to connect the grounding terminal of the external charging connector and the ground wire. Figure 2 and Figure 4 As shown, in the contracted state, the piezoelectric structure 12 drives the charging pin 111 and the grounding pin 112 to move downward, thereby controlling the charging pin 111 to disconnect the power supply terminal of the charging circuit and the external charging connector, and driving the grounding pin 112 to disconnect the grounding terminal and the ground wire of the external charging connector.

[0043] If the piezoelectric structure 12 is selected to be horizontally telescopic, such as Figure 6 and Figure 7As shown, the piezoelectric structure 12 adjusts the positions of the charging pin 111 and the ground pin 112 in the horizontal direction. Figure 6 As shown, in the extended state, the piezoelectric structure 12 drives the charging pin 111 and the ground pin 112 to move to the right, thereby controlling the charging pin 111 to connect the charging circuit and the power supply terminal of the external charging connector, and driving the ground pin 112 to connect the ground terminal of the external charging connector and the ground wire. Figure 7 As shown, in the contracted state, the piezoelectric structure 12 drives the charging pin 111 and the grounding pin 112 to move to the left, thereby controlling the charging pin 111 to disconnect the power supply terminal of the charging circuit and the external charging connector, and driving the grounding pin 112 to disconnect the grounding terminal and the ground wire of the external charging connector.

[0044] To protect the charging port and prevent external dust from entering electronic devices, such as... Figures 1 to 4 As shown, the charging interface also includes a sealing plate 4. The sealing plate 4 is made of plastic or rubber insulating material. The sealing plate 4 is located on one side of the piezoelectric structure 12. The sealing plate 4 has openings corresponding to the charging pin 111 and the grounding pin 112. One end of the charging pin 111 passes through the opening in the sealing plate 4 and is connected to the charging circuit. The other end of the charging pin 111 is located on the top surface of the piezoelectric structure 12. One end of the grounding pin 112 passes through the opening in the sealing plate 4 and is connected to the ground wire. The other end of the grounding pin 112 is located on the top surface of the piezoelectric structure 12.

[0045] To further prevent external dust from entering the electronic device, the charging pin 111 and the grounding pin 112 can be placed only on the top surface of the piezoelectric structure 12, and leads can be provided on the charging pin 111 and the grounding pin 112. One end of the charging pin 111 can be connected to the charging circuit through the sealing plate 4 via the lead, and similarly, one end of the grounding pin 112 can be connected to the ground wire through the sealing plate 4 via the lead, thus avoiding the direct provision of openings for the charging pin 111 and the grounding pin 112 at the sealing plate 4.

[0046] In one embodiment, such as Figures 1 to 4 As shown, the electro-deformation mechanism 1 further includes an insulating layer 13. The insulating layer 13 may be a ceramic insulating layer. The insulating layer 13 is disposed between the piezoelectric structure 12 and the charging terminal 11. The insulating layer 13 is located on the surface of the piezoelectric structure 12 to prevent the charging terminal 11 from directly contacting the piezoelectric structure 12.

[0047] Since the charging terminal 11 includes a charging pin 111 and a grounding pin 112, in order to prevent the charging pin 111 and the grounding pin 112 from directly contacting the piezoelectric structure 12, an insulating layer 13 is disposed between the piezoelectric structure 12 and the charging pin 111, and the insulating layer 13 is also disposed between the piezoelectric structure 12 and the grounding pin 112.

[0048] To prevent wear during the state transition of the piezoelectric structure 12, the electrodeformation mechanism 1 further includes a protective layer. The protective layer is a reinforcing metal sheet covering the surface of the piezoelectric structure 12, protecting it from wear during the transition between contracted and extended states. Alternatively, an insulating layer 13 and a protective layer can be provided simultaneously, depending on user requirements. The protective layer covers the surface of the piezoelectric structure 12, while the insulating layer 13 is positioned between the protective layer and the charging terminal 11. This prevents the charging pin 111 and the grounding pin 112 from directly contacting the piezoelectric structure 12, while also enhancing the wear resistance of the piezoelectric structure 12.

[0049] It should be noted that the piezoelectric structure 12 and the thermistor 2 can be connected in series or in parallel. When the piezoelectric structure 12 and the thermistor 2 are connected in series, the piezoelectric structure 12 is made of an inverse piezoelectric material, and the thermistor 2 includes an NTC (Negative Temperature Coefficient) resistor. An NTC resistor is a thermistor with a negative temperature coefficient, exhibiting an exponential decrease in resistance with increasing temperature. This material is a semiconductor ceramic produced by thoroughly mixing, molding, and sintering two or more metal oxides such as manganese, copper, silicon, cobalt, iron, nickel, and zinc, and can be used to manufacture thermistors with a negative temperature coefficient (NTC). Its resistivity and material constant vary with the material composition ratio, sintering atmosphere, sintering temperature, and structural state.

[0050] One end of the NTC resistor is electrically connected to ground, and the other end is electrically connected to the charging circuit through the piezoelectric structure 12. When the temperature of the charging interface is lower than the preset temperature, the resistance of the NTC resistor is relatively high. Due to the lower voltage drop across the piezoelectric structure 12, the piezoelectric structure 12 is in an extended state. In this state, the piezoelectric structure 12 drives the charging terminal 11 to electrically connect the external charging connector and the charging circuit, controlling the external charging connector to charge the electronic device. When the temperature of the charging interface is higher than the preset temperature, the NTC resistor decreases. Since the impedance of the piezoelectric structure 12 remains almost unchanged, the voltage drop across the piezoelectric structure 12 increases, and the piezoelectric structure 12 generates an inverse piezoelectric effect. At this time, the piezoelectric structure 12 is in a contracted state. The piezoelectric structure 12 drives the charging terminal to disconnect the external charging connector and the charging circuit, controlling the external charging connector to stop charging the electronic device and preventing a short circuit at the charging interface.

[0051] When the piezoelectric structure 12 and the thermistor 2 are connected in parallel, the thermistor 2 includes a PTC (Positive Temperature Coefficient) resistor. The PTC resistor uses a positive temperature coefficient thermistor material, which has the characteristic that the resistivity increases with increasing temperature.

[0052] One end of the PTC resistor is electrically connected to ground, and the other end is electrically connected to the charging circuit. The piezoelectric structure 12 is connected in parallel across the PTC resistor. When the charging interface temperature is below a preset temperature, the PTC resistor has a lower resistance, resulting in a lower voltage drop across the piezoelectric structure 12 and the PTC resistor. Consequently, the voltage drop across the piezoelectric structure 12 decreases, and the piezoelectric structure 12 is in an extended state. When the charging interface temperature is above the preset temperature, the voltage drop across the piezoelectric structure 12 and the PTC resistor increases, resulting in a higher voltage drop across the piezoelectric structure 12. The piezoelectric structure 12 is in a contracted state.

[0053] like Figure 8 As shown, the charging circuit includes: a protector 14, a PMIC chip 15 (Power Management IC), and a charging chip 16.

[0054] Protector 14 is an overvoltage protector. PMIC chip 15 is used to manage the power supply in the electronic device, and charging chip 16 is used to manage the charging of the electronic device. PMIC chip 15 is electrically connected to charging pin 111 and piezoelectric structure 12 through protector 14, and similarly, charging chip 16 is electrically connected to charging pin 111 and one end of piezoelectric structure 12 through protector 14. The other end of piezoelectric structure 12 is connected to ground through thermistor 2 and external resistor 5 in sequence.

[0055] When the temperature of the charging interface is lower than the preset temperature, the resistance of thermistor 2 is within the first preset range. For example, when the temperature is below 150 degrees Celsius, the resistance of thermistor 2 is relatively large. Due to the low voltage drop across piezoelectric structure 12, piezoelectric structure 12 is in an extended state. In this state, piezoelectric structure 12 drives charging pin 111 to connect the charging circuit and the feed terminal of the external charging connector. Piezoelectric structure 12 also drives grounding pin 112 to connect the ground terminal of the external charging connector to the ground wire through external resistor 5, thus controlling the external charging connector to charge the electronic device. During this process, protector 14 protects the circuit, PMIC chip 15 manages the power supply in the electronic device, and charging chip 16 controls the charging of the electronic device.

[0056] When the temperature of the charging interface is higher than the preset temperature, the resistance of thermistor 2 will be within the second preset range, for example, when the temperature reaches 150 degrees Celsius or above. Figure 2 and Figure 4As shown, the resistance of the thermistor 2 decreases. Since the impedance of the piezoelectric structure 12 remains almost unchanged, the voltage drop across the piezoelectric structure 12 increases, and the piezoelectric structure 12 generates the inverse piezoelectric effect. At this time, the piezoelectric structure 12 is in a contracted state. The piezoelectric structure 12 drives the charging pin 111 to disconnect the charging circuit and the charging terminal of the charging interface. The piezoelectric structure 12 drives the grounding pin to disconnect the grounding terminal and ground wire of the external charging connector, controlling the external charging connector to stop charging the electronic device and avoid short circuit at the charging interface.

[0057] like Figure 9 As shown, the charging circuit also includes a MOSFET 17. The gate of the MOSFET 17 is electrically connected to one end of the PMIC chip 15 to receive control signals from the controller. The other end of the PMIC chip 15 is electrically connected to ground via the thermistor 2 to receive temperature signals transmitted by the thermistor 2. The source of the MOSFET 17 is electrically connected to the protector 14, and the drain of the MOSFET 17 is electrically connected to the piezoelectric structure 12.

[0058] One end of the PMIC chip 15 is electrically connected to the charging pin 111 and the piezoelectric structure 12 via the protector 14, and the other end of the PMIC chip is connected to ground via the thermistor 2. Similarly, the charging chip 16 is electrically connected to the charging pin 111 and one end of the piezoelectric structure 12 via the protector 14. The other end of the piezoelectric structure 12 is connected to ground via the thermistor 2 and the external resistor 5. The source of the MOSFET 17 is connected to the protector 14, and the drain of the MOSFET 17 is connected to the piezoelectric structure 12.

[0059] In this embodiment, by setting the MOS transistor 17, the PMIC chip 15 can control the charging interface through the control program. The thermistor 2 is set outside the interface body 3. The PMIC chip 15 obtains the temperature signal through the thermistor 2. When the temperature of the charging interface is lower than the preset temperature, the resistance value of the thermistor 2 is within the first preset range. For example, when the temperature is below 150 degrees Celsius, the PMIC chip 15 controls the drain and source of the MOS transistor to disconnect. Since the voltage division on the piezoelectric structure 12 is low, the piezoelectric structure 12 is in the extended state at this time. In this state, the piezoelectric structure 12 drives the charging pin 111 to connect the charging circuit and the feed terminal of the external charging connector. The piezoelectric structure 12 drives the ground pin 112 to connect the ground terminal of the external charging connector to the ground line through the external resistor 5, thereby controlling the external charging connector to charge the electronic device.

[0060] PMIC chip 15 obtains temperature signals through thermistor 2. When the temperature of the charging interface is higher than the preset temperature, the resistance of thermistor 2 is within the second preset range. For example, when the temperature reaches 150 degrees Celsius or above, the resistance of thermistor 2 decreases. PMIC chip 15 controls the drain and source of the MOS transistor to form a conductive channel. Since the impedance of piezoelectric structure 12 is almost unchanged, the voltage drop across piezoelectric structure 12 increases, and piezoelectric structure 12 generates the inverse piezoelectric effect. At this time, piezoelectric structure 12 is in a contracted state. Piezoelectric structure 12 drives charging pin 111 to disconnect the charging circuit and the charging terminal of the charging interface. Piezoelectric structure 12 drives grounding pin to disconnect the grounding terminal and ground wire of the external charging connector, controlling the external charging connector to stop charging the electronic device and avoid short circuit at the charging interface.

[0061] This application also provides an electronic device, comprising: a device body and a charging interface. The charging interface is disposed on one side of the device body. Figures 1 to 4 As shown, the charging interface includes: an interface body 3, an electro-deformation mechanism 1, and a thermistor 2 disposed within the interface body 3. The interface body 3 serves as the metal casing of the charging interface, protecting the components within the interface. The electro-deformation mechanism 1 has a charging terminal 11. The electro-deformation mechanism 1 can switch between a first state and a second state as the voltage changes, controlling the position of the charging terminal 11 during the state transition. The thermistor 2 is electrically connected to the electro-deformation mechanism 1 and is used to adjust the voltage across the electro-deformation mechanism 1. The resistance of the thermistor 2 changes with the temperature of the charging interface.

[0062] Depending on the design requirements, the thermistor 2 can be located inside or outside the interface body 3. The thermistor 2 is used to sense the temperature inside the charging interface. One end of the thermistor 2 is electrically connected to the electro-deformation mechanism 1, and the other end of the thermistor 2 is electrically connected to the interface body 3, which is grounded.

[0063] When the temperature of the charging interface is lower than a preset temperature, the resistance of thermistor 2 remains within a first preset range, for example, when the temperature of the charging interface is below 150 degrees Celsius. Figure 1 and Figure 3 As shown, with the change in resistance of the thermistor 2, the voltage on the electro-deformation mechanism 1 changes, and the electro-deformation mechanism 1 switches to the first state. In this embodiment, the first state of the electro-deformation mechanism 1 is the extended state. In this state, the electro-deformation mechanism 1 drives the charging terminal 11 to be electrically connected to the external charging connector (external data cable) and controls the external charging connector to charge the electronic device.

[0064] When the temperature of the charging interface is higher than the preset temperature, the resistance of thermistor 2 will be within the second preset range, for example, when the temperature reaches 150 degrees Celsius or above. Figure 2 and Figure 4 As shown, with the change in resistance of the thermistor 2, the voltage on the electro-deformation mechanism 1 changes, and the electro-deformation mechanism 1 switches to the second state. In this embodiment, the second state of the electro-deformation mechanism 1 is the contracted state. The electro-deformation mechanism 1 drives the charging terminal 11 to disconnect from the external charging connector (external data line), controls the external charging connector to stop charging the electronic device, and avoids short circuit at the charging interface.

[0065] The electronic device provided in this application is equipped with the aforementioned charging interface. The charging interface incorporates an electro-deformation mechanism with two different configurations to drive the charging terminal. A thermistor is electrically connected to the electro-deformation mechanism. When the temperature of the charging interface is below a preset temperature, the thermistor's resistance is within a first preset range, the electro-deformation mechanism is in a first state, and the charging terminal and external charging connector are electrically connected to charge the electronic device. When the temperature of the charging interface is above the preset temperature, the thermistor's resistance is within a second preset range, the electro-deformation mechanism is in a second state, and the charging terminal and external charging connector are disconnected. This ensures the temperature within the charging interface, improves the safety of the charging interface, and guarantees a better user experience.

[0066] This application also provides a charging method for an electronic device, which is used to control the aforementioned electronic device. The charging method includes the following steps:

[0067] Step S101: Obtain the temperature inside the charging interface.

[0068] Step S102: Compare the temperature inside the charging interface with the preset temperature.

[0069] During the charging process of an electronic device, the temperature inside the charging port can be sensed and obtained through thermistor 2. The temperature inside the charging port and the preset temperature are determined and compared.

[0070] Step S103: When the temperature inside the charging interface is below the preset temperature, control the charging terminal to be electrically connected to the external charging connector.

[0071] When the temperature of the charging interface is lower than the preset temperature, the resistance of thermistor 2 remains within the first preset range, for example, when the temperature is below 150 degrees Celsius. Figure 1 and Figure 3 As shown, with the change in resistance of the thermistor 2, the voltage on the electro-deformation mechanism 1 changes, and the electro-deformation mechanism 1 switches to the first state. In this embodiment, the first state of the electro-deformation mechanism 1 is the extended state. In this state, the electro-deformation mechanism 1 drives the charging terminal 11 to be electrically connected to the external charging connector (external data cable) and controls the external charging connector to charge the electronic device.

[0072] Step S104: When the temperature inside the charging interface is at or above the preset temperature, control the charging terminal to disconnect from the external charging connector.

[0073] When the temperature of the charging interface is higher than the preset temperature, the resistance of thermistor 2 will be within the second preset range, for example, when the temperature reaches 150 degrees Celsius or above. Figure 2 and Figure 4 As shown, with the change in resistance of the thermistor 2, the voltage on the electro-deformation mechanism 1 changes, and the electro-deformation mechanism 1 switches to the second state. In this embodiment, the second state of the electro-deformation mechanism 1 is the contracted state. The electro-deformation mechanism 1 drives the charging terminal 11 to disconnect from the external charging connector, controls the external charging connector to stop charging the electronic device, and avoids short circuit at the charging interface.

[0074] 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 this application. 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.

[0075] Although embodiments of this application 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 this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A charging interface, characterized in that, include: An electro-deformation mechanism is provided with a charging terminal, and the electro-deformation mechanism can switch between a first state and a second state as the voltage changes; A thermistor, electrically connected to the electro-deformation mechanism, is used to adjust the voltage across the electro-deformation mechanism. The resistance of the thermistor changes with the temperature of the charging interface. When the temperature of the charging interface is lower than the preset temperature, the resistance of the thermistor is within the first preset range, the electro-deformation mechanism is in the first state, and the charging terminal and the external charging connector are electrically connected to charge the electronic device. When the temperature of the charging interface is higher than the preset temperature, the resistance value of the thermistor is within the second preset range, the electro-deformation mechanism is in the second state, and the charging terminal and the external charging connector are disconnected.

2. The charging interface according to claim 1, characterized in that, The electro-deformation mechanism includes: A piezoelectric structure that can switch between a contracted state and an extended state in response to changes in the voltage across its terminals; the piezoelectric structure is electrically connected to the thermistor; and a charging terminal is disposed on the piezoelectric structure. When the piezoelectric structure is in a retracted state, the external charging connector and the charging terminal are disconnected; when the piezoelectric structure is in an extended state, the external charging connector and the charging terminal are electrically connected.

3. The charging interface according to claim 2, characterized in that, The charging interface further includes a charging circuit, which is used to adjust the input voltage and is electrically connected to the piezoelectric structure.

4. The charging interface according to claim 3, characterized in that, The charging terminal includes a charging pin and a grounding pin; both the charging pin and the grounding pin are disposed on the piezoelectric structure. When the piezoelectric structure is in a contracted state, the charging pin is disconnected from the charging circuit or the power supply terminal of the external charging connector, and the grounding pin is disconnected from the grounding terminal or ground wire of the external charging connector. When the piezoelectric structure is in the extended state, the charging pin connects the charging circuit and the power supply terminal of the external charging connector, and the grounding pin connects the grounding terminal of the external charging connector and the ground wire.

5. The charging interface according to claim 4, characterized in that, The charging interface also includes: A sealing plate is disposed on one side of the piezoelectric structure. One end of the charging pin passes through the sealing plate and is connected to the charging circuit. The other end of the charging pin is disposed on the top surface of the piezoelectric structure. One end of the grounding pin passes through the sealing plate and is connected to the ground wire. The other end of the grounding pin is disposed on the top surface of the piezoelectric structure.

6. The charging interface according to claim 2, characterized in that, The electro-deformation mechanism further includes an insulating layer disposed between the piezoelectric structure and the charging terminal.

7. The charging interface according to claim 2, characterized in that, The electro-deformation mechanism further includes a protective layer that wraps around the surface of the piezoelectric structure.

8. The charging interface according to any one of claims 3-5, characterized in that, The thermistor includes an NTC resistor; one end of the NTC resistor is electrically connected to ground, and the other end of the NTC resistor is electrically connected to the charging circuit through the piezoelectric structure.

9. The charging interface according to any one of claims 3-5, characterized in that, The thermistor includes a PTC resistor; one end of the PTC resistor is electrically connected to ground, and the other end of the PTC resistor is electrically connected to the charging circuit, and the piezoelectric structure is connected in parallel across the two ends of the PTC resistor.

10. The charging interface according to any one of claims 3-5, characterized in that, The charging circuit includes: Protector; The PMIC chip is electrically connected to the charging terminal and the piezoelectric structure respectively through the protector; The charging chip is electrically connected to the charging terminal and the piezoelectric structure respectively through the protector.

11. The charging interface according to claim 10, characterized in that, The charging circuit also includes: a MOSFET; The gate of the MOS transistor is electrically connected to one end of the PMIC chip, the source of the MOS transistor is electrically connected to the protector, and the drain of the MOS transistor is electrically connected to the piezoelectric structure; the other end of the PMIC chip is electrically connected to the ground line through the thermistor.

12. An electronic device, characterized in that, The electronic device includes a charging interface as described in any one of claims 1-11.

Images