Charging circuit and terminal equipment
By designing parallel power management chips and charge pump charging chip charging circuits in terminal devices with folding screens, the problem of local accumulation of heat caused by fast charging is solved, and a safe and reliable fast charging effect is achieved.
Patent Information
- Application Number
- CN202421713228.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-18
AI Technical Summary
Terminal devices with folding screens are prone to local accumulation of heat due to low thermal conductivity during fast charging, damaging the hardware or causing fire risks.
Design a charging circuit, which includes setting up a power management chip and a charge pump charging chip in the two folded bodies of the terminal device, which are connected in parallel between the port and the battery, ensuring that the current is transmitted to the battery through two paths, avoiding overheating caused by excessive current, and reducing the risk of local accumulation by dispersing heat.
It realizes the heat generated by charging while maintaining the fast charging speed, avoiding local accumulation of heat, and protecting the hardware security of terminal equipment and user safety.
Smart Images
Figure CN222915690U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of terminal charging, and in particular to a charging circuit and a terminal device. Background Art
[0002] With the progress of science and technology, the functions of terminal devices such as smart phones are becoming more and more abundant, the performance is becoming more and more excellent, and the degree of dependence and the usage frequency of users on terminal devices have also been greatly improved. At the same time, the power consumption of terminal devices is getting higher and higher, and the demand for battery power and battery charging speed is getting greater and greater. Therefore, many current terminal devices are configured with a fast charging function, that is, charging the terminal device with a higher charging power to improve the charging speed.
[0003] However, the fast charging technology in the related art also causes the terminal device to generate serious heat during the charging process. In particular, the terminal device with a folding screen has a low heat conduction efficiency due to the device form, and it is easy for heat to accumulate locally, which not only easily damages the hardware safety in the terminal device, but even easily causes dangers such as fires. Summary of the Invention
[0004] To overcome the problems existing in the related art, embodiments of the present disclosure provide a charging circuit and a terminal device to solve the defects in the related art.
[0005] According to a first aspect of an embodiment of the present disclosure, a charging circuit is provided, and the circuit includes:
[0006] A power management chip is disposed in a folding body of the terminal device, an input end of the power management chip is connected to the port of the terminal device, and an output end is connected to a battery in the terminal device;
[0007] A charge pump charging chip is disposed in another folding body of the terminal device, an input end of the charge pump charging chip is connected to the port of the terminal device, and an output end is connected to a battery in the terminal device;
[0008] Wherein, the two folding bodies of the terminal device are connected to each other and can be opened and closed, and are connected to the folding screen of the terminal device, and the current input into the port of the terminal device is transmitted to the battery in the terminal device through the power management chip and the charge pump charging chip.
[0009] In some embodiments of the present disclosure, the current input into the port of the terminal device is shunted to the power management chip and the charge pump charging chip according to a preset ratio.
[0010] In some embodiments of the present disclosure, the current input into the port of the terminal device is shunted to the power management chip and the charge pump charging chip according to the distribution ratio corresponding to the current.
[0011] In some embodiments of the present disclosure, when the current input into the port of the terminal device exceeds a preset threshold, the current is transmitted to the battery in the terminal device through the power management chip and the charge pump charging chip.
[0012] In some embodiments of the present disclosure, when the current input into the port of the terminal device does not exceed the preset threshold, the current is transmitted to the battery in the terminal device through the power management chip or the charge pump charging chip.
[0013] In some embodiments of the present disclosure, the power management chip has a parameter feedback branch for detecting parameters of the output current of the power management chip;
[0014] The power management chip is configured to adjust the parameters of the output current of the power management chip based on the parameters detected by the parameter feedback branch, so as to control the distribution ratio of the current input into the port between the power management chip and the charge pump charging chip.
[0015] In some embodiments of the present disclosure, the power management chip has a battery monitoring branch for detecting parameters of the battery in the terminal device;
[0016] The power management chip is configured to communicate with the power supply device connected to the port based on the parameters detected by the battery monitoring branch, so as to control the parameters of the current input into the port.
[0017] In some embodiments of the present disclosure, the output end of the power management chip is respectively connected to the batteries in the two folding bodies of the terminal device.
[0018] In some embodiments of the present disclosure, the output end of the charge pump charging chip is respectively connected to the batteries in the two folding bodies of the terminal device.
[0019] According to a second aspect of the embodiments of the present disclosure, there is provided a terminal device, which includes the charging circuit described in any of the above embodiments.
[0020] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:
[0021] The charging circuit provided by the embodiments of the present disclosure is applied to a terminal device with a folding screen, and includes a power management chip disposed in one folding body of the terminal device and a charge pump charging chip disposed in another folding body of the terminal device. The input ends of the power tube management chip and the charge pump charging chip are both connected to the port of the terminal device, and the output ends of the power tube management chip and the charge pump charging chip are both connected to the battery of the terminal device. In other words, the power management chip and the charge pump charging chip respectively disposed in the two folding bodies are connected in parallel between the port and the battery, so that the current input into the port during charging of the terminal device can be transmitted to the battery in the terminal device through two paths of the power management chip and the charge pump charging chip, avoiding overheating of the power management chip and the charge pump charging chip due to excessive current. Moreover, the power management chip and the charge pump charging chip are respectively disposed in the two folding bodies, which can disperse the heat generated by each of them into the two folding bodies, further avoiding local accumulation of heat and protecting the hardware safety of the terminal device and the user's usage safety. Description of the Drawings
[0022] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.
[0023] Figure 1 is a schematic structural diagram of the charging circuit shown in an exemplary embodiment of the present disclosure;
[0024] Figure 2 is a schematic distribution diagram of the charging circuit in the terminal device shown in an exemplary embodiment of the present disclosure;
[0025] Figure 3 is a block diagram of the structure of the terminal device shown in an exemplary embodiment of the present disclosure. Detailed Embodiments
[0026] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0027] The terms used in the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0028] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination".
[0029] With the progress of science and technology, the functions of terminal devices such as smart phones are becoming more and more abundant, the performance is becoming more and more excellent, and the degree of dependence and usage frequency of users on terminal devices have also increased significantly. At the same time, the power consumption of terminal devices is getting higher and higher, and the demand for battery power and battery charging speed is getting greater and greater. Therefore, many current terminal devices are configured with a fast charging function, that is, charging the terminal device at a higher charging power to improve the charging speed.
[0030] However, the fast charging technology in related technologies also causes the terminal device to generate serious heat during the charging process. In particular, terminal devices with folding screens have low thermal conductivity due to their device form, and heat is likely to accumulate locally, which not only easily damages the hardware safety inside the terminal device, but even easily causes dangers such as fires.
[0031] Based on this, in a first aspect, at least one embodiment of the present disclosure provides a charging circuit, which can be applied to a terminal device with a folding screen (such as a common up-and-down folding screen mobile phone, a left-and-right folding screen mobile phone, etc.), so that when the terminal device charges based on this charging circuit, the fast charging speed remains unchanged, and at the same time, the heat generated by fast charging is dispersed in different folding bodies of the terminal device, so as to avoid the heat generated by fast charging from accumulating locally in the terminal device, causing overheating and affecting the charging efficiency, hardware safety, and user's use safety.
[0032] Please refer to the appendix Figure 1 , which exemplarily shows a schematic structural diagram of the charging circuit provided by the present disclosure. Please refer to the appendix Figure 2 , which exemplarily shows a schematic distribution diagram of the charging circuit provided by the present disclosure inside the terminal device. The charging circuit includes a power management integrated circuit (PMIC) and a charge pump charging chip (ChargePump, CP) that are connected in parallel between the port and the battery of the terminal device and are respectively arranged in two folding bodies of the terminal device.
[0033] The terminal device is a terminal device with a foldable screen, including a body and a foldable screen. The body includes two folding bodies that are connected to each other and can be opened and closed, that is, the two folding bodies are connected by a rotating shaft and can be rotated into an unfolded state, a closed state, or any state between the unfolded state and the closed state; the two folding bodies are connected to the foldable screen, that is, the foldable screen is connected to the inner sides of the two folding bodies, and the foldable screen can be opened and closed as the two folding bodies are opened and closed, so as to be in an unfolded state, a closed state, or any state between the unfolded state and the closed state. It should be understood that the two folding bodies can be distributed left and right, that is, the terminal device is a left-right foldable screen terminal device, or distributed up and down, that is, the terminal device is an up-down foldable screen terminal device.
[0034] The port of the terminal device can be a USB (Universal Serial Bus) interface such as a Type-C port, etc., for connecting a charger, etc. The port can be connected to an over-voltage protection module (Over-Voltage Protection Metal-Oxide-Semiconductor Field-Effect Transistor, OVP MOS), and the current output from the port needs to flow through the over-voltage protection module before it can be output. For example, after flowing through the over-voltage protection module, it is input to the power management chip and the charge pump charging chip, so as to prevent the components in the terminal device from being damaged due to excessive voltage.
[0035] The terminal device can be provided with one battery or multiple batteries. For example, the terminal device is respectively provided with a battery in each of the two folding bodies, so as to avoid local heat accumulation during the charging and discharging process of the battery.
[0036] Among them, the power management chip is arranged in one folding body of the terminal device. The input end of the power management chip is connected to the port of the terminal device, and the output end is connected to the battery in the terminal device. For example, the output end of the power management chip is respectively connected to the batteries in the two folding bodies of the terminal device.
[0037] Among them, the charge pump charging chip is arranged in the other folding body of the terminal device. The input end of the charge pump charging chip is connected to the port of the terminal device, and the output end is connected to the battery in the terminal device. For example, the output end of the charge pump charging chip is respectively connected to the batteries in the two folding bodies of the terminal device.
[0038] Based on the above circuit structure, when the terminal device is charging, the current input into the port can be transmitted to the battery in the terminal device through the power management chip and the charge pump charging chip.
[0039] For example, the current input into the port of the terminal device is shunted to the power management chip and the charge pump charging chip according to a preset ratio. The preset ratio can be, for example, power management chip:charge pump charging chip = 1:1 or 1:2, etc. The present disclosure does not intend to limit this.
[0040] For another example, the current input into the port of the terminal device is shunted to the power management chip and the charge pump charging chip according to the distribution ratio corresponding to the current. As the current input into the port is different, the corresponding distribution ratio can be different. For example, when the current input into the port is less than the first current threshold, the corresponding distribution ratio is power management chip:charge pump charging chip = 1:1; when the current input into the port is not less than the first current threshold and less than the second current threshold, the corresponding distribution ratio is power management chip:charge pump charging chip = 1:2; when the current input into the port is not less than the second current threshold, the corresponding distribution ratio is power management chip:charge pump charging chip = 1:3, and so on. The present disclosure does not intend to limit the correspondence between the current input into the port and the distribution ratio.
[0041] The charging circuit provided by the embodiments of the present disclosure is applied to a terminal device with a folding screen, and includes a power management chip disposed in one folding body of the terminal device and a charge pump charging chip disposed in another folding body of the terminal device. The input ends of the power management chip and the charge pump charging chip are both connected to the port of the terminal device, and the output ends of the power management chip and the charge pump charging chip are both connected to the battery of the terminal device; in other words, the power management chip and the charge pump charging chip respectively disposed in the two folding bodies are connected in parallel between the port and the battery, so that when the terminal device is charging, the current input into the port can be transmitted to the battery in the terminal device through two paths of the power management chip and the charge pump charging chip, avoiding overheating due to excessive current in the power management chip and the charge pump charging chip, and the power management chip and the charge pump charging chip respectively disposed in the two folding bodies can disperse the heat generated by each in the two folding bodies, further avoiding local accumulation of heat and protecting the hardware safety of the terminal device and the user's usage safety.
[0042] In some embodiments of the present disclosure, when the current input into the port of the terminal device exceeds a preset threshold, the current is transmitted to the battery in the terminal device through the power management chip and the charge pump charging chip.
[0043] Correspondingly, when the current input into the port of the terminal device does not exceed the preset threshold, the current is transmitted to the battery in the terminal device through the power management chip or the charge pump charging chip.
[0044] In this embodiment, start conditions are set for the shunting of the current input into the port. That is, when the current is relatively large, the current input into the port is shunted to two paths, namely the power management chip and the charge pump charging chip, to charge the battery. When the current is relatively small, the current input into the port is used to charge the battery through one path of either the power management chip or the charge pump charging chip. Thereby, the charging efficiency can be improved when the current is small, current loss can be avoided, and at the same time, the service life of the hardware can be reduced. When the current is large, local accumulation of heat can be avoided, protecting the hardware safety of the terminal device and the user's usage safety, and overall improving the flexibility of the charging circuit.
[0045] In some embodiments of the present disclosure, the power management chip has a battery monitoring branch for detecting parameters of the battery within the terminal device. Based on this, the power management chip is used to communicate with the power supply device connected to the port based on the parameters detected by the battery monitoring branch to control the parameters of the current input into the port.
[0046] For example, a charging protocol module (Universal Serial Bus Power Delivery Physical Layer, USB PD PHY) is integrated in the power management chip. The charging protocol module is connected to the port. For example, the CC pins of the power management chip are respectively connected to the charging protocol module and the port to achieve the connection between the charging protocol module and the port. The charging protocol module is configured with charging protocols in the USB PD standard, such as the PPS protocol, etc. Therefore, the charging protocol module can determine the charging current suitable for the current parameters of the battery (such as capacity, voltage, current, etc.) based on the charging protocol, and then communicate with the charger connected to the port based on the charging protocol to notify the charger to input current into the port according to the above charging current.
[0047] In this embodiment, charging protocol communication is completed through the power management chip to achieve fast charging, make the charging power of the charger suitable for the current parameters of the battery, and protect the battery safety while improving the charging efficiency.
[0048] In some embodiments of the present disclosure, the power management chip has a parameter feedback branch for detecting parameters of the output current of the power management chip. Based on this, the power management chip is used to adjust the parameters of the output current of the power management chip based on the parameters detected by the parameter feedback branch to control the distribution ratio of the current input into the port between the power management chip and the charge pump charging chip.
[0049] Among them, the power management chip has a closed-loop power topology architecture and can control the output current for adjustment based on a hardware feedback circuit, namely, a parameter feedback branch. The charge pump charging chip has an open-loop power topology architecture and outputs a stable charging current based on software regulation.
[0050] Since the current value in the input port applied by the power management chip to the charger is stable, the adjustment of the output current of the power management chip can achieve the purpose of adjusting the distribution ratio of the input current in the port between the power management chip and the charge pump charging chip, so that the distribution ratio between the two meets the preset ratio requirement or the distribution ratio corresponding to the input current in the port.
[0051] According to a second aspect of the embodiments of the present disclosure, there is provided a terminal device, and the terminal device includes the charging circuit described in any of the above embodiments.
[0052] Please refer to the appendix Figure 3 , which exemplarily shows a block diagram of the terminal device. For example, the device 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
[0053] Referring to Figure 3 , the device 300 may include one or more of the following components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.
[0054] The processing component 302 generally controls the overall operation of the device 300, such as operations associated with display, telephone call, data communication, camera operation, and recording operation. The processing component 302 may include one or more processors 320 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 302 may include one or more modules to facilitate the interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate the interaction between the multimedia component 308 and the processing component 302.
[0055] The memory 304 is configured to store various types of data to support the operation of the device 300. Examples of such data include instructions for any application or method operating on the device 300, contact data, phone book data, messages, pictures, videos, and the like. The memory 304 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.
[0056] The power component 306 provides power to the various components of the device 300. The power component 306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 300.
[0057] The multimedia component 308 includes a screen that provides an output interface between the device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of the touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 308 includes a front camera and / or a rear camera. When the device 300 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.
[0058] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when the device 300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.
[0059] The I / O interface 312 provides an interface between the processing component 302 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc. These buttons can include, but are not limited to: a home button, a volume button, a power button, and a lock button.
[0060] The sensor assembly 314 includes one or more sensors for providing a status assessment of various aspects of the device 300. For example, the sensor assembly 314 can detect the on / off state of the device 300, the relative positioning of components, such as the display and keypad of the device 300. The sensor assembly 314 can also detect a change in the position of the imaging device 300 or a component of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration / deceleration of the device 300, and a change in the temperature of the device 300. The sensor assembly 314 can also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 314 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
[0061] The communication component 316 is configured to facilitate communication between the device 300 and other devices in a wired or wireless manner. The device 300 can access a wireless network based on communication standards, such as WiFi, 2G or 3G, 4G or 5G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
[0062] In an exemplary embodiment, the device 300 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.
[0063] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the disclosure herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the present disclosure are pointed out by the following claims.
[0064] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.
Claims
1. A charging circuit, characterized in that: The circuit comprises: A power management chip is disposed in a foldable body of the terminal device, wherein an input end of the power management chip is connected to a port of the terminal device, and an output end of the power management chip is connected to a battery in the terminal device; A charge pump charging chip is arranged in another folding body of the terminal device, wherein an input end of the charge pump charging chip is connected to a port of the terminal device, and an output end of the charge pump charging chip is connected to a battery in the terminal device; Among them, the two folding bodies of the terminal device are connected to each other and can be opened and closed, and are connected to the folding screen of the terminal device. The current input into the port of the terminal device is transmitted to the battery in the terminal device through the power management chip and the charge pump charging chip.
2. The charging circuit according to claim 1, characterized in that: The current input into the port of the terminal device is divided into the power management chip and the charge pump charging chip according to a preset ratio.
3. The charging circuit according to claim 1, characterized in that: The current input into the port of the terminal device is divided into the power management chip and the charge pump charging chip according to the distribution ratio corresponding to the current.
4. The charging circuit according to claim 1, characterized in that: When the current input into the port of the terminal device exceeds a preset threshold, the current is transmitted to the battery in the terminal device through the power management chip and the charge pump charging chip.
5. The charging circuit according to claim 4, characterized in that: When the current input into the port of the terminal device does not exceed the preset threshold, the current is transmitted to the battery in the terminal device through the power management chip or the charge pump charging chip.
6. The charging circuit according to claim 1, characterized in that: The power management chip has a parameter feedback branch for detecting the parameters of the output current of the power management chip; The power management chip is used to adjust the parameters of the output current of the power management chip based on the parameters detected by the parameter feedback branch to control the distribution ratio of the current input into the port between the power management chip and the charge pump charging chip.
7. The charging circuit according to claim 1, characterized in that: The power management chip has a battery monitoring branch for detecting parameters of the battery in the terminal device; The power management chip is used to communicate with the power supply device connected to the port based on the parameters detected by the battery monitoring branch, so as to control the parameters of the current input into the port.
8. The charging circuit according to claim 1, characterized in that: The output ends of the power management chip are respectively connected to the batteries in the two folding bodies of the terminal device.
9. The charging circuit according to claim 1, characterized in that: The output ends of the charge pump charging chip are respectively connected to the batteries in the two folding bodies of the terminal device.
10. A terminal device, characterized in that: The terminal device comprises the charging circuit according to any one of claims 1 to 9.