power supply device

Abstract

The application provides a power supply device, which comprises a power supply control circuit and a position detection circuit. The power supply control circuit is used for connecting with a device to be charged. The position detection circuit is electrically connected with the power supply control circuit and is used for detecting a relative position state of the power supply device and the device to be charged. The relative position state comprises a contact state and a non-contact state. In the contact state, the power supply control circuit controls output power of the power supply device to the device to be charged based on a preset first temperature threshold. In the non-contact state, the power supply control circuit controls output power of the power supply device to the device to be charged based on a preset second temperature threshold. The first temperature threshold is smaller than the second temperature threshold. The power supply device can improve the condition of high temperature in the working process of the power supply device.

Description

Technical Field

[0001] This application relates to the field of power management technology, and more particularly to a power supply device. Background Technology

[0002] With rapid economic development, electronic devices such as mobile phones and headphones have become necessities in people's daily lives. As living standards improve, people have higher and higher requirements for the power supply equipment that can provide power to electronic devices. Among these requirements, the overheating problem of power supply equipment is one of the key concerns, and there is an urgent need to improve power supply equipment that suffers from severe overheating. Utility Model Content

[0003] This application provides a power supply device to improve the high temperature situation during the operation of the power supply device.

[0004] This application provides a power supply device, which includes a power supply control circuit and a position detection circuit. The power supply control circuit is used to connect to a device to be charged. The position detection circuit is connected to the power supply control circuit and is used to detect the relative position state between the power supply device and the device to be charged, including a contact state and a non-contact state. In the contact state, the power supply control circuit controls the output power of the power supply device to the device to be charged based on a preset first temperature threshold. In the non-contact state, the power supply control circuit controls the output power of the power supply device to the device to be charged based on a preset second temperature threshold. The first temperature threshold is less than the second temperature threshold.

[0005] The power supply equipment also includes a power supply circuit, which is electrically connected to the power supply control circuit. It is used to store electrical energy and output power supply voltage to provide power to the power supply equipment or the equipment to be charged.

[0006] The position detection circuit includes a magnetic induction circuit, which is electrically connected to the power supply control circuit. The magnetic induction circuit is used to output a first signal corresponding to the contact state when it senses the magnetic signal of the device to be charged; and to output a second signal corresponding to the non-contact state when it does not sense the magnetic signal. The power supply control circuit determines the relative position state between the power supply device and the device to be charged based on the first signal and the second signal.

[0007] The magnetic induction circuit includes a magnetic sensor and a switching transistor. The magnetic sensor is used to sense magnetic signals. The first terminal of the switching transistor is used to connect to the power supply voltage. The control terminal of the switching transistor is connected to the output terminal of the magnetic sensor. The second terminal of the switching transistor is grounded and connected to the power supply control circuit, and is used to output a first signal or a second signal to the power supply control circuit.

[0008] The power supply control circuit includes a main control circuit and a first voltage conversion circuit. The main control circuit is electrically connected to the position detection circuit. The first voltage conversion circuit is electrically connected to the main control circuit and is used to receive the power supply voltage and to provide power to the device to be charged through a wire. The main control circuit receives real-time temperature information from the device and controls the output power of the first voltage conversion circuit according to the relative position status output by the position detection circuit. Specifically, when a contact state is detected and the real-time temperature is greater than or equal to a first temperature threshold, the main control circuit controls the first voltage conversion circuit to reduce its output power. When a non-contact state is detected and the real-time temperature is greater than or equal to a second temperature threshold, the main control circuit controls the first voltage conversion circuit to reduce its output power.

[0009] The power supply control circuit also includes a second voltage conversion circuit, which is electrically connected to the main control circuit. This second voltage conversion circuit is used to receive the power supply voltage and to provide power to the device to be charged via wireless technology. The main control circuit receives real-time temperature information from the power supply device and controls the output power of the second voltage conversion circuit based on the relative position status output by the position detection circuit. Specifically: when a contact state is detected and the real-time temperature is greater than or equal to a first temperature threshold, the main control circuit controls the second voltage conversion circuit to reduce its output power; when a non-contact state is detected and the real-time temperature is greater than or equal to a second temperature threshold, the main control circuit controls the second voltage conversion circuit to reduce its output power.

[0010] The power supply equipment also includes a temperature acquisition circuit, which is electrically connected to the power supply control circuit and is used to acquire the real-time temperature of the power supply equipment. The power supply control circuit reduces the output power of the power supply equipment to the device to be charged based on the comparison result between the real-time temperature and a first temperature threshold or a second temperature threshold.

[0011] The power supply circuit includes a battery, which is electrically connected to the power supply control circuit to output DC power supply voltage.

[0012] The power supply circuit also includes a protection circuit, which is electrically connected to the power supply control circuit and the battery. The protection circuit is used to monitor various safety parameters of the battery and provide abnormal protection functions.

[0013] The power supply equipment also includes a prompting circuit, which is electrically connected to the power supply control circuit and is used to output prompt information related to the power supply status when the output power decreases.

[0014] The beneficial technical effects of this application are as follows: The power supply device of this application detects the relative position of the power supply device and the device to be charged through a position detection circuit. The power supply control circuit controls the output power of the power supply device to the device to be charged based on a first temperature threshold in the contact state or a second temperature threshold in the non-contact state, so as to improve the heat generation of the power supply device by reducing the output power. Furthermore, the first temperature threshold in the contact state is lower than the second temperature threshold in the non-contact state, which means that the power supply device cools down earlier in the contact state than in the non-contact state. This can improve the problem of high temperature of the power supply device caused by heat generation in the contact state, and at the same time, it can ensure that the power supply device can charge the device to be charged more quickly in the non-contact state. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the power supply equipment provided in this application;

[0017] Figure 2 This is a schematic diagram of an embodiment of the magnetic induction circuit provided in this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 10 Power supply equipment; 110 Power supply control circuit; 111 Main control circuit; 112 First voltage conversion circuit; 113 Second voltage conversion circuit; 120 Position detection circuit; 121 Magnetic induction circuit; 130 Power supply circuit; 131 Battery; 132 Protection circuit; 140 Temperature acquisition circuit; 150 Indication circuit; 160 Input / output port; Magnetic sensor U11; Switching transistor Q11. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] This application provides a power supply device that can directly or indirectly output a power supply voltage to provide electrical energy to a device being charged. The power supply device can provide electrical energy to the device being charged via a wire or via wireless technology; there is no limitation on this. The specific type of power supply device can be an adapter or a power bank; there is no limitation on this. The device being charged can be an electronic device such as a mobile phone, tablet, or headset; there is no limitation on this.

[0023] See Figure 1 , Figure 1 This is a schematic diagram of an embodiment of the power supply device provided in this application. The power supply device 10 includes a power supply control circuit 110 and a position detection circuit 120 that are electrically connected. The power supply control circuit 110 is used to connect with the device to be charged via wired or wireless means, and output the power supply voltage required by the device to be charged to charge the device, as well as to implement functions such as the charging protocol with the device to be charged.

[0024] The position detection circuit 120 is used to detect the relative position of the power supply device 10 and the device to be charged. The relative position includes contact and non-contact states. A contact state can be a state where the edges of the power supply device 10 and the device to be charged are in contact; or a state where the bodies of the power supply device 10 and the device to be charged are in contact; or a state where the body of one of the power supply device 10 and the device to be charged is in contact with the edge of the other; or a state where the distance between the power supply device 10 and the device to be charged is less than a certain distance, for example, less than 1 cm. A non-contact state refers to a state where the power supply device 10 and the device to be charged are separated and the distance between them is greater than a certain distance. The specific value of this distance can be determined based on the heat dissipation effect of the power supply device 10 and is not limited here.

[0025] In the contact state, the power supply control circuit 110 controls the output power of the power supply device 10 to the device to be charged based on a preset first temperature threshold. In the non-contact state, the power supply control circuit 110 controls the output power of the power supply device 10 to the device to be charged based on a preset second temperature threshold, wherein the first temperature threshold is less than the second temperature threshold.

[0026] Understandably, both the power supply device 10 and the device to be charged generate heat during the charging process. In the contact state, the heat generated by the device to be charged reduces the heat dissipation rate of the power supply device 10; in the non-contact state, the impact of the heat generated by the device to be charged on the heat dissipation rate of the power supply device 10 is negligible. The power supply device 10 of this application uses a position detection circuit 120 to detect the relative position of the power supply device 10 and the device to be charged. The power supply control circuit 110 controls the output power of the power supply device 10 to the device to be charged based on a first temperature threshold in the contact state or a second temperature threshold in the non-contact state, thereby improving the heat generation of the power supply device 10 by reducing the output power. Furthermore, the first temperature threshold in the contact state is lower than the second temperature threshold in the non-contact state, causing the power supply device 10 to cool down earlier in the contact state than in the non-contact state. This improves the problem of high temperature caused by the heat generated by the power supply device 10 in the contact state, while ensuring that the power supply device 10 can charge the device to be charged more quickly in the non-contact state.

[0027] In one embodiment, the power supply device 10 further includes a power supply circuit 130, which is electrically connected to the power supply control circuit 110. The power supply circuit 130 is used to store electrical energy and output a power supply voltage to provide power to the electrical components of the entire power supply device 10 or to the device to be charged. The power supply voltage can be a DC power supply voltage or an AC power supply voltage, which is not limited here.

[0028] In one embodiment, the power supply circuit 130 includes a battery 131, which is electrically connected to the power supply control circuit 110. The battery 131 is used to output a DC power supply voltage. In this embodiment, the power supply circuit 130 provides a DC power supply voltage to the entire system of the power supply device 10 by setting the battery 131, so that the power supply device 10 can realize a mobile function. That is, the power supply device 10 in this embodiment is a portable power supply device 10, which can be easily carried by the user.

[0029] In one embodiment, the battery 131 includes a lithium battery 131, which has the functions of being stable and lightweight, and can enhance the power supply reliability of the power supply device 10.

[0030] In one embodiment, to enhance the safety and reliability of the power supply device 10, the power supply circuit 130 further includes a protection circuit 132, which is electrically connected to the power supply control circuit 110 and the battery 131. The protection circuit 132 monitors safety parameters of the battery 131, such as overcharge, over-discharge, overcurrent, and short circuit, and provides abnormal protection for the battery 131 and the entire power supply device 10 circuit. The protection circuit 132 can be a battery management chip, or it can be a circuit composed of circuits with functions such as battery overcharge, over-discharge, overcurrent, and short circuit protection; there are no limitations on this.

[0031] In one embodiment, to improve the user experience, the power supply device 10 further includes a prompting circuit 150, which is electrically connected to the power supply control circuit 110 and is used to output prompting information. The prompting information can be sound, light, text, or other types of prompting information, and there is no limitation on the type of prompting information. The prompting information can be battery level information of the 131, fault information of the power supply device 10, or operating status information of the power supply device 10, and there is no limitation on the type of prompting information. The prompting circuit 150 can be an LED circuit, or an OLED display circuit, a liquid crystal display circuit, a digital tube, or other circuit used for text display, or a buzzer, a player, or other circuit used for sound information playback, and there is no limitation on the type of prompting information.

[0032] For example, the prompting circuit 150 can output prompt information related to the power supply status when the output power of the power supply device 10 decreases.

[0033] In one embodiment, the position detection circuit 120 may include conventional circuits capable of position detection, such as a distance detection circuit, a pressure detection circuit, and a magnetic induction circuit. The position detection circuit 120 may include any one or more of the above-mentioned circuits, without limitation.

[0034] In one embodiment, to improve the accuracy of the relative position detection between the power supply device 10 and the device to be charged, the position detection circuit 120 includes a magnetic induction circuit. The magnetic induction circuit is electrically connected to the power supply control circuit 110. When a magnetic signal from the device to be charged is sensed, the magnetic induction circuit outputs a first signal corresponding to a contact state; when no magnetic signal is sensed, it outputs a second signal corresponding to a non-contact state. The power supply control circuit 110 determines the relative position between the power supply device 10 and the device to be charged based on the first and second signals.

[0035] Understandably, the distance between the device to be charged and the power supply device 10 is smaller in the contact state than in the non-contact state, and the intensity or change of the magnetic signal sensed by the magnetic induction circuit is greater in the contact state than in the non-contact state. In this embodiment, the magnetic induction circuit can output different signals based on the intensity or change of the magnetic signal. For example, when the intensity of the magnetic signal is greater than or equal to a preset threshold, it is considered that the magnetic induction circuit has sensed the magnetic signal of the device to be charged, and a first signal corresponding to the contact state is output; when the intensity of the magnetic signal is less than the preset threshold, it is considered that the magnetic induction circuit has not sensed the magnetic signal of the device to be charged, and a second signal corresponding to the non-contact state is output. The magnetic signal of the device to be charged can be provided by its built-in or custom-installed magnet ring.

[0036] In one embodiment, see Figure 2 , Figure 2 This is a schematic diagram of an embodiment of the magnetic induction circuit provided in this application. The magnetic induction circuit 121 includes a magnetic sensor U11 and a switch Q11. The magnetic sensor U11 is used to sense the magnetic signal of the device to be charged. The first terminal of the switch Q11 is used to connect to the power supply voltage, which can be directly or indirectly from the power supply circuit 130, and is not limited here. The control terminal of the switch Q11 is connected to the output terminal of the magnetic sensor U11. The second terminal of the switch Q11 is grounded and connected to the power supply control circuit 110, and outputs a first signal or a second signal to the power supply control circuit 110. The magnetic sensor U11 can output different level signals by detecting the intensity of the magnetic signal. For example, when there is no magnetic attraction, the magnetic sensor U11 outputs a high-level signal, at which time the switch Q11 is off, and the control terminal of the switch Q11 outputs a low-level signal; when there is magnetic attraction, the magnetic sensor U11 outputs a low-level signal, at which time the switch Q11 is on, and the control terminal of the switch Q11 outputs a high-level signal. The power supply control circuit 110 confirms the relative position state between the power supply device 10 and the device to be charged based on the received signal. The magnetic induction circuit 121 in this embodiment has a simple structure and is easy to implement.

[0037] In one embodiment, the position detection circuit 120 further includes a low-dropout linear regulator circuit (not shown in the figure), which is connected to the power supply circuit 130 and the first terminal of the switching transistor Q11, respectively, to provide a stable and appropriate power supply voltage to the switching transistor Q11.

[0038] In one embodiment, the power supply control circuit 110 includes a main control circuit 111 and a first voltage conversion circuit 112. The main control circuit 111 is electrically connected to the position detection circuit 120. The first voltage conversion circuit 112 is electrically connected to the main control circuit 111, receives the power supply voltage, and provides power to the device to be charged through a wire. The main control circuit 111 can receive real-time temperature information from the power supply device 10 and control the output power of the first voltage conversion circuit 112 according to the relative position status output by the position detection circuit 120. In the contact state, if the real-time temperature is greater than or equal to a first temperature threshold, the main control circuit 111 controls the first voltage conversion circuit 112 to reduce its output power; in the non-contact state, if the real-time temperature is greater than or equal to a second temperature threshold, the main control circuit 111 controls the first voltage conversion circuit 112 to reduce its output power.

[0039] Specifically, the first voltage conversion circuit 112 includes a buck-boost topology circuit. The first voltage conversion circuit 112 can be connected to the battery 131 and can output voltages of different values, which are used to charge the device to be charged. In addition, external AC or DC power supply voltages can also charge the battery 131 through the first voltage conversion circuit 112.

[0040] In one embodiment, the power supply control circuit 110 further includes a second voltage conversion circuit 113, which is electrically connected to the main control circuit 111. The second voltage conversion circuit 113 is used to receive the power supply voltage and to provide power to the device to be charged via wireless technology. The main control circuit 111 receives real-time temperature information from the power supply device 10 and controls the output power of the second voltage conversion circuit 113 based on the relative position status output by the position detection circuit 120. In a contact state, if the real-time temperature is greater than or equal to a first temperature threshold, the main control circuit 111 controls the second voltage conversion circuit 113 to reduce its output power; in a non-contact state, if the real-time temperature is greater than or equal to the second temperature threshold, the main control circuit 111 controls the second voltage conversion circuit 113 to reduce its output power. The second voltage conversion circuit 113 is a conventional wireless charging circuit.

[0041] In one embodiment, the main control circuit 111 includes a processor and peripheral circuitry for maintaining the normal operation of the processor. For example, the peripheral circuitry may be a crystal oscillator circuit, a decoupling circuit, etc. The processor may also be referred to as a CPU (Central Processing Unit). The processor may be an integrated circuit chip with signal processing capabilities. The processor may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor may be a microprocessor or any conventional processor.

[0042] In one embodiment, the power supply device 10 further includes different types of input / output ports 160, which are electrically connected to the first voltage conversion circuit 112.

[0043] In one embodiment, the power supply device 10 further includes a temperature acquisition circuit 140, which is electrically connected to the power supply control circuit 110 and is used to acquire the real-time temperature of the power supply device 10. The power supply control circuit 110 reduces the output power of the power supply device 10 to the device to be charged based on a comparison between the real-time temperature of the power supply device 10 and a first temperature threshold or a second temperature threshold. Understandably, the power supply control circuit 110 determines the first or second temperature threshold that triggers the reduction of output power based on the current relative position of the power supply device 10 and the device to be charged, and controls the power supply circuit 130 to reduce the output power based on the real-time temperature of the power supply device 10. For example, the power supply control circuit 110 compares the real-time temperature with the first or second temperature threshold. In a contact state, if the real-time temperature is greater than or equal to the first temperature threshold, the power supply control circuit 110 controls the power supply device 10 to reduce the output power to the device to be charged; in a non-contact state, if the real-time temperature is greater than or equal to the second temperature threshold, the power supply control circuit 110 controls the power supply device 10 to reduce the output power to the device to be charged.

[0044] In one embodiment, the temperature of the power supply device 10 may be the temperature of the battery 131 collected by the temperature acquisition circuit 140, or the temperature of the end of the casing of the power supply device 10, or the temperature of the battery 131 and the end, which is not limited here.

[0045] In a specific application, the power supply device 10 includes a power supply control circuit 110, a magnetic induction circuit 121, a power supply circuit 130, a prompting circuit 150, a temperature acquisition circuit 140, and an input / output port 160. The power supply circuit 130 includes a battery 131 and a protection circuit 132. The power supply control circuit 110 includes a main control circuit 111 and a first voltage conversion circuit 112. The protection circuit 132 is connected to both the battery 131 and the first voltage conversion circuit 112. The first voltage conversion circuit 112 is also connected to both the main control circuit 111 and the input / output port 160. The main control circuit 111 is also connected to the magnetic induction circuit 121, the prompting circuit 150, and the temperature acquisition circuit 140. The first temperature threshold is 50°C, and the second temperature threshold is 55°C. When the power supply device 10 and the device to be charged are placed on a table without magnetic attraction, i.e. in a non-contact state, the main control circuit 111 sets the trigger temperature for reducing output power, i.e., the second temperature threshold, to 55°C. This allows the product to maintain high power operation for a longer period of time and fully charge the device to be charged in a shorter time. When the power supply device 10 and the device to be charged are held together and overlapped, with magnetic attraction, i.e. in a contact state, the main control circuit 111 sets the trigger temperature for reducing output power, i.e., the first temperature threshold, to 50°C. This reduces the discharge power in advance, preventing the outer shell temperature of the power supply device 10 from rising too much when it is working, thus providing a better tactile temperature experience.

[0046] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments are included within the scope of protection of this technical solution.

Claims

1. A power supply device, characterized in that, include: Power supply control circuit, used to connect to the device to be charged; A position detection circuit, electrically connected to the power supply control circuit, is used to detect the relative position state between the power supply device and the device to be charged, the relative position state including a contact state and a non-contact state; In the contact state, the power supply control circuit controls the output power of the power supply device to the device to be charged based on a preset first temperature threshold. In the non-contact state, the power supply control circuit controls the output power of the power supply device to the device to be charged based on a preset second temperature threshold. The first temperature threshold is less than the second temperature threshold.

2. The power supply equipment according to claim 1, characterized in that, The power supply equipment also includes: The power supply circuit, electrically connected to the power supply control circuit, is used to store electrical energy and output a power supply voltage to provide power to the power supply equipment or the device to be charged.

3. The power supply equipment according to any one of claims 1 or 2, characterized in that, The position detection circuit includes: A magnetic induction circuit is electrically connected to the power supply control circuit. The magnetic induction circuit is used to output a first signal corresponding to the contact state when it senses the magnetic signal of the device to be charged; and to output a second signal corresponding to the non-contact state when it does not sense the magnetic signal. The power supply control circuit determines the relative position state between the power supply device and the device to be charged based on the first signal and the second signal.

4. The power supply equipment according to claim 3, characterized in that, The magnetic induction circuit includes: A magnetic sensor is used to sense the magnetic signal; The switching transistor has a first terminal for receiving a power supply voltage; a control terminal for connecting to the output terminal of the magnetic sensor; and a second terminal for grounding and connecting to the power supply control circuit, used to output the first signal or the second signal to the power supply control circuit.

5. The power supply equipment according to any one of claims 1 or 2, characterized in that, The power supply control circuit includes: The main control circuit is electrically connected to the position detection circuit; The first voltage conversion circuit is electrically connected to the main control circuit, and is used to connect to the power supply voltage and to provide power to the device to be charged through the wire; The main control circuit is used to receive real-time temperature information from the power supply equipment and control the output power of the first voltage conversion circuit according to the relative position status output by the position detection circuit, wherein: When the contact state is detected and the real-time temperature is greater than or equal to the first temperature threshold, the main control circuit controls the first voltage conversion circuit to reduce the output power. When the non-contact state is detected and the real-time temperature is greater than or equal to the second temperature threshold, the main control circuit controls the first voltage conversion circuit to reduce the output power.

6. The power supply equipment according to claim 5, characterized in that, The power supply control circuit also includes: The second voltage conversion circuit is electrically connected to the main control circuit, used to receive the power supply voltage, and used to provide power to the device to be charged via wireless technology; The main control circuit is used to receive real-time temperature information from the power supply equipment and control the output power of the second voltage conversion circuit according to the relative position status output by the position detection circuit, wherein: When the contact state is detected and the real-time temperature is greater than or equal to the first temperature threshold, the main control circuit controls the second voltage conversion circuit to reduce the output power. When the non-contact state is detected and the real-time temperature is greater than or equal to the second temperature threshold, the main control circuit controls the second voltage conversion circuit to reduce the output power.

7. The power supply equipment according to any one of claims 1 or 2, characterized in that, The power supply equipment also includes: A temperature acquisition circuit, electrically connected to the power supply control circuit, is used to acquire the real-time temperature of the power supply equipment. The power supply control circuit reduces the output power of the power supply device to the device to be charged based on the comparison result between the real-time temperature and the first temperature threshold or the second temperature threshold.

8. The power supply equipment according to claim 2, characterized in that, The power supply circuit includes: The battery is electrically connected to the power supply control circuit and is used to output DC power supply voltage.

9. The power supply equipment according to claim 8, characterized in that, The power supply circuit also includes: The protection circuit is electrically connected to both the power supply control circuit and the battery. The protection circuit is used to monitor various safety parameters of the battery and provide abnormal protection functions.

10. The power supply equipment according to claim 8, characterized in that, The power supply equipment also includes: The prompting circuit, electrically connected to the power supply control circuit, is used to output prompt information related to the power supply status when the output power decreases.

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