Charging circuit and portable foldable charging device

Abstract

The embodiment of the invention discloses a charging circuit and a portable foldable charging device, and belongs to the technical field of electronic equipment, and the charging circuit comprises a power supply access port, a charging output port, a main control assembly, a charging control circuit, a first switch and a second switch. The power supply end of the main control assembly is connected with the power supply access port; the charging control circuit is connected with the main control assembly and the charging output port, and the charging control circuit is configured to control the charging voltage and the charging current of the charging output port; the first switch is connected with the power supply access port and the charging output port; the second switch is connected with the power supply access port and the input end of the charging control circuit; the output end of the charging control circuit is connected with the charging output port; the control end of the first switch and the control end of the second switch are connected with the main control assembly, and the main control assembly is configured to control on or off of the first switch and the second switch. According to the invention, the charging circuit has multiple charging forms, and the compatibility of the charging circuit is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic device technology, and more particularly to a charging circuit and a portable, foldable charging device. Background Technology

[0002] In recent years, portable electronic devices, such as mobile phones and tablets, have been widely adopted. These electronic products generally consume a lot of power, thus leading to the development and widespread application of power banks. A power bank is a portable charging device that integrates power supply and charging functions. It typically uses lithium-ion batteries as its energy storage unit and is convenient and quick to use.

[0003] However, current portable power banks are generally not compatible with multiple power supply methods and cannot provide power over a wide range, resulting in low compatibility and limiting their application scenarios. Summary of the Invention

[0004] The present invention provides several embodiments of a charging circuit and a portable foldable charging device, wherein at least one embodiment enables the charging circuit to have multiple charging modes, thereby improving the compatibility of the charging circuit and the charging device and expanding its application scenarios.

[0005] According to one aspect of the present invention, a charging circuit is provided, comprising:

[0006] Power input port and charging output port;

[0007] The main control component, wherein the power supply terminal of the main control component is connected to the power input port;

[0008] A charging control circuit is connected to the main control component and the charging output port. The charging control circuit is configured to control the charging voltage and charging current of the charging output port.

[0009] A first switch and a second switch, wherein the first switch is connected to the power input port and the charging output port; the second switch is connected to the power input port and the input terminal of the charging control circuit, and the output terminal of the charging control circuit is connected to the charging output port; the control terminals of the first switch and the second switch are connected to the main control component, and the main control component is configured to control the first switch and the second switch to be turned on or off.

[0010] Optionally, the charging circuit further includes: a battery assembly and a battery charging and discharging control circuit;

[0011] The battery assembly is connected to the first terminal of the battery charge / discharge control circuit, the second terminal of the battery charge / discharge control circuit is connected to the power input, and the third terminal of the battery charge / discharge control circuit is connected to the main control assembly.

[0012] Optionally, the charging control circuit includes:

[0013] A voltage conversion circuit connects the main control component and the second switch;

[0014] A current control circuit is connected to the voltage conversion circuit and the charging output port, and the current control circuit is configured to change the output current.

[0015] Optionally, the charging circuit further includes: a touch screen control component;

[0016] The touch screen control component is connected to the main control component, and the touch screen control component is configured to set the charging mode of the charging circuit; wherein, the charging mode includes a direct charging mode and an indirect charging mode.

[0017] Optionally, the charging circuit further includes a temperature detection circuit;

[0018] The temperature detection circuit is connected to the main control component. The temperature detection circuit is configured to detect the temperature of the device to be charged during the charging process after the charging output port is connected to the device to be charged, and transmit the temperature to the main control component.

[0019] Optionally, the charging circuit further includes a wireless charging circuit; the wireless charging circuit is connected to the main control component.

[0020] Optionally, the charging circuit further includes: a first indicator light;

[0021] The first indicator light is connected to the main control component, and the first indicator light is configured to indicate the temperature.

[0022] Optionally, the charging circuit further includes: a second indicator light;

[0023] The second indicator light is connected to the main control component, and the second indicator light is configured to light up when the charging circuit is not in a protected state.

[0024] Optionally, the charging circuit further includes an alarm component, which is connected to the main control component.

[0025] Optionally, both the first switch and the second switch include a transistor, and the control electrode of the transistor is connected to the main control component;

[0026] The main control component is configured to control the transistor in the first switch to turn on when the charging mode of the charging circuit is direct charging mode, and the main control component is configured to control the transistor in the second switch to turn on when the charging mode of the charging circuit is indirect charging mode.

[0027] According to another aspect of the present invention, a portable foldable charging device is provided, including the charging circuit provided in any embodiment of the present invention;

[0028] The power input, the main control component, the charging control circuit, the first switch, and the second switch are integrated on the circuit board;

[0029] The portable, foldable charging device also includes:

[0030] A cover plate and a bottom shell are hinged together, and the circuit board is disposed on the cover plate or the circuit board is disposed on the bottom shell.

[0031] Optionally, the charging circuit further includes a battery assembly and a wireless charging circuit;

[0032] The circuit board is disposed on the cover plate, and the wireless charging circuit and the battery assembly are stacked on the bottom shell.

[0033] Optionally, the cover plate includes a first upper cover and a first lower cover; the first upper cover, the circuit board, and the first lower cover are stacked together;

[0034] The bottom shell includes a second upper cover and a second lower cover; the second upper cover, the wireless charging circuit, the battery assembly and the second lower cover are stacked.

[0035] Optionally, the charging circuit further includes a touch screen control component, an alarm component, a first indicator light, and a second indicator light;

[0036] The power input, the touch screen control component, the alarm component, the first indicator light, and the second indicator light are located on the first upper cover.

[0037] Optionally, the portable foldable charging device further includes: a heat dissipation platform;

[0038] The heat dissipation platform is stacked with the second upper cover.

[0039] Optionally, the charging circuit further includes a temperature detection circuit;

[0040] The temperature detection circuit is located on the second upper cover.

[0041] The technical solution of this invention, through the configuration of a charging circuit including a power input port, a charging output port, a main control component, a charging control circuit, a first switch, and a second switch, wherein the main control component is configured to control the on / off state of the first and second switches, and the first and second switches are not simultaneously on, thereby enabling the power supply voltage connected to the power input port to directly charge the device to be charged when the main control component controls the first switch to be on. Since the charging control circuit is in an off state at this time, the power consumption of the charging circuit can be reduced. Furthermore, when the main control component controls the second switch to be on, the power supply voltage connected to the power input port charges the device to be charged through the second switch and a voltage conversion circuit. At this time, the charging control circuit can adjust the charging voltage to convert the power supply voltage to various voltage levels to be compatible with different devices to be charged, thereby improving the compatibility of the charging circuit and achieving wide-range power supply. Moreover, the charging circuit can directly or indirectly charge the device to be charged, thus enabling multiple charging methods, further improving its compatibility, and enhancing the compatibility of charging devices based on this charging circuit.

[0042] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of a charging circuit provided in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of another charging circuit provided in an embodiment of the present invention;

[0046] Figure 3 This invention provides a charging path diagram for a battery-powered device.

[0047] Figure 4 A charging path diagram provided by an embodiment of the present invention when powered by an external charger;

[0048] Figure 5 This is another charging path diagram provided by an embodiment of the present invention when powered by an external charger;

[0049] Figure 6This is a schematic diagram of another charging circuit provided in an embodiment of the present invention;

[0050] Figure 7 A schematic diagram of the structure of a portable foldable charging device provided in an embodiment of the present invention;

[0051] Figure 8 An unfolded view of a portable foldable charging device provided in an embodiment of the present invention;

[0052] Figure 9 An assembly diagram of a portable, foldable charging device provided for an embodiment of the present invention;

[0053] Figure 10 An assembly diagram of another portable foldable charging device provided in an embodiment of the present invention;

[0054] Figure 11 A folded front view of a portable foldable charging device provided in an embodiment of the present invention;

[0055] Figure 12 This is a reverse view of a portable foldable charging device provided in an embodiment of the present invention after folding. Detailed Implementation

[0056] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and their variations, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] This invention provides a charging circuit. Figure 1 This is a schematic diagram of a charging circuit provided in an embodiment of the present invention. See also: Figure 1The charging circuit includes a power input port, a charging output port, a main control component 10, a charging control circuit 20, a first switch 30, and a second switch 40.

[0059] The main control component 10 has its power supply terminal connected to a power input port, which is connected to a supply voltage VCC, for example, 5V. The charging control circuit 20 connects the main control component 10 to the charging output port and is configured to control the charging voltage and current of the charging output port. A first switch 30 connects the power input port and the charging output port; a second switch 40 connects the power input port and the input terminal of the charging control circuit 20, and the output terminal of the charging control circuit 20 is connected to the charging output port. The control terminals of the first switch 30 and the second switch 40 are connected to the main control component 10, which is configured to control the on / off state of the first switch 30 and the second switch 40.

[0060] The charging circuit is used in a charging device, which can be a power bank. The first switch 30 and the second switch 40 can be switched on or off simultaneously. The power supply voltage VCC connected to the power input can be provided by different power supply components. The power input can be a Type-C interface, so any Type-C charger for everyday household digital products can be used as an external power source connected to the charging circuit. This circuit adjusts the charging voltage and current to ensure safe charging of the digital product. The charging output port is configured to connect to the device to be charged, which can be a small household digital electronic product. The charging output port includes a first charging output terminal V+ and a second charging output terminal V-, which are respectively connected to the first and second power supply terminals of the device to be charged.

[0061] Specifically, when the main control component 10 controls the first switch 30 to be turned on and the second switch 40 to be turned off, the supply voltage VCC connected to the power input port is directly transmitted to the charging output port through the turned-on first switch 30 to supply power to the device to be charged. At this time, the charging control circuit 20 does not participate in the charging process and is in the off state, which can reduce power consumption during charging. When the main control component 10 controls the second switch 40 to be turned on and the first switch 30 to be turned off, the supply voltage VCC connected to the power input port supplies power to the device to be charged through the second switch 40 and the charging control circuit 20. At this time, the charging control circuit 20 can adjust the supply voltage VCC according to the actual needs of the device to be charged, that is, to control the charging voltage and charging current of the charging output port, so as to stably convert the supply voltage VCC to various voltage levels required in the subsequent charging stage, thereby ensuring that various devices from low voltage to high voltage can obtain fast and safe charging and achieve wide-range power supply.

[0062] The technical solution of this invention, through the configuration of a charging circuit including a power input port, a charging output port, a main control component, a charging control circuit, a first switch, and a second switch, wherein the main control component is configured to control the on / off state of the first and second switches, and the first and second switches are not simultaneously on, thereby enabling the power supply voltage connected to the power input port to directly charge the device to be charged when the main control component controls the first switch to be on. Since the charging control circuit is in an off state at this time, the power consumption of the charging circuit can be reduced. Furthermore, when the main control component controls the second switch to be on, the power supply voltage connected to the power input port charges the device to be charged through the second switch and a voltage conversion circuit. At this time, the charging control circuit can adjust the charging voltage to convert the power supply voltage to various voltage levels to be compatible with different devices to be charged, thereby improving the compatibility of the charging circuit and achieving wide-range power supply. Moreover, the charging circuit can directly or indirectly charge the device to be charged, thus enabling multiple charging methods, further improving its compatibility, and enhancing the compatibility of charging devices based on this charging circuit.

[0063] As can be understood from the above analysis of the charging process of the charging circuit, the main control component can charge the device to be charged by turning on either the first switch or the second switch. Furthermore, the charging path of the charging voltage to the device differs depending on which switch is turned on, thus resulting in different charging modes. For ease of description, the mode where the charging voltage directly charges the device from the first switch can be referred to as the direct charging mode, while the mode where the charging voltage charges the device from the second switch and the charging control circuit can be referred to as the indirect charging mode.

[0064] Optionally, the power input can be connected to a power supply component including a battery component and an external charger (external charging component). When different power supply components are connected, the main control component 10 controls the corresponding switch to be turned on, so as to provide power to the device to be charged through different power supply paths.

[0065] Figure 2 This is a schematic diagram of another charging circuit provided in an embodiment of the present invention. Figure 3 This invention provides a charging path diagram for a battery-powered circuit. Figure 4 This invention provides a charging path diagram for when powered by an external charger, according to an embodiment of the invention. Figure 5 This is another charging path diagram provided by an embodiment of the present invention when powered by an external charger.

[0066] See Figure 2Optionally, based on the above embodiments, the charging circuit further includes a touch screen control component 70; the touch screen control component 70 is connected to the main control component 10, and the touch screen control component 70 is configured to set the charging mode of the charging circuit; wherein, the charging mode includes a direct charging mode and an indirect charging mode.

[0067] The touchscreen control component 70 serves as the control center for charging conversion, allowing for the setting and real-time monitoring of all functional parameters of the device. For example, it can display data such as charging current, charging voltage, power, charging mode, and product temperature in real time; adjust the output voltage and current values; set temperature protection points; and configure the charging mode.

[0068] Specifically, in direct charging mode, the charging voltage and charging current are the default values ​​of the external power supply input by the external charger, and the relevant charging parameters are displayed in real time on the display screen in the touch screen control component 70. In indirect charging mode, the charging voltage and charging current parameters can be set through the display screen in the touch screen control component 70, and the settings are also displayed in real time on the same screen. The display screen can be a touch screen.

[0069] Optionally, the main control component 10 may include an MCU (Microcontroller Unit). The MCU uses software programming technology to control the various components, circuits, and switches in the charging circuit. The MCU communicates with the touch screen control component 70 in real time via data transmission technology, constantly monitoring data such as charging current, charging voltage, and the temperature of the product being charged (e.g., a digital product), and takes corresponding control actions. At the same time, it can send relevant data to the display screen to display relevant parameters in real time.

[0070] See Figure 2 Optionally, both the first switch 30 and the second switch 40 include transistors, with the control electrode of the transistors connected to the main control component 10; the main control component 10 is configured to control the transistor in the first switch 30 to conduct when the charging mode of the charging circuit is the direct charging mode, and the main control component 10 is configured to control the transistor in the second switch 40 to conduct when the charging mode of the charging circuit is the indirect charging mode.

[0071] Specifically, the first switch 30 includes a first transistor M1, and the second switch 40 includes a second transistor M2. The gates of the first transistor M1 and the second transistor M2 are both connected to the main control component 10.

[0072] See Figure 2Optionally, the charging circuit also includes a battery assembly 50 and a battery charge / discharge control circuit 60. The battery assembly 50 is connected to the first terminal of the battery charge / discharge control circuit 60, the second terminal of the battery charge / discharge control circuit 60 is connected to the power input, and the third terminal of the battery charge / discharge control circuit 60 is connected to the main control component 10.

[0073] The battery assembly 50 may include a high-capacity lithium battery.

[0074] For details, see Figure 2 and Figure 3 When the main control component 10 detects that no external charger is connected to the power input, it controls the battery charging and discharging control circuit 60 to conduct, adjusting the charging circuit to supply power to the battery assembly 50. At this time, the power supply voltage VCC is provided by the battery assembly 50. The main control component 10 controls the second switch 40 to conduct, and the power supply voltage VCC provided by the battery assembly 50 is adjusted by the charging control circuit 20 to provide wired charging for the digital product 500. Figure 3 The red arrow in the middle shows the charging path when the digital product 500 is wired-charged via the battery assembly 50 in indirect charging mode.

[0075] For details, see Figure 2 and Figure 4 When the main control component 10 detects an external charger connected to the power input, it controls the discharge path of the battery charge / discharge control circuit 60 to be turned off and the charging path of the battery charge / discharge control circuit 60 to be turned on, so that the external power supply can charge the battery assembly 50. At this time, the charging circuit supplies power to the external power supply provided by the external charger, and the supply voltage VCC is provided by the external power supply. When the main control component 10 controls the second switch 40 to be turned on, the supply voltage VCC provided by the external power supply is adjusted by the charging control circuit 20 for charging voltage and charging current, and then wired charging is performed on the digital product 500. Figure 4 The red arrow in the middle shows the charging path when the digital product 500 is wired to charge via an external power source in indirect charging mode.

[0076] For details, see Figure 2 and Figure 5When the main control component 10 detects an external charger connected to the power input, it controls the discharge path of the battery charge / discharge control circuit 60 to be turned off and the charging path of the battery charge / discharge control circuit 60 to be turned on, so that the external power supply can charge the battery assembly 50. At this time, the charging circuit is powered by the external power supply provided by the external charger, and the supply voltage VCC is provided by the external power supply. When the main control component 10 controls the first switch 30 to be turned on, the charging control circuit 20 can be bypassed, and the supply voltage VCC provided by the external power supply can directly charge the digital product 500 via wired connection through the first transistor M1. Figure 5 The red arrow in the middle shows the charging path when the digital product 500 is wired to charge via an external power source in direct charging mode.

[0077] That is, when the power supply voltage VCC is provided by the battery pack 50, the charging circuit charges the digital product in an indirect charging mode; when the power supply voltage VCC is provided by an external power source, the charging circuit charges the digital product in either a direct charging mode or an indirect charging mode.

[0078] See also Figure 2 Optionally, the charging control circuit 20 includes a voltage conversion circuit 21 and a current control circuit 22. The voltage conversion circuit 21 is connected to the main control component 10 and the second switch 40; the current control circuit 22 is connected to the voltage conversion circuit 21 and the charging output port, and the current control circuit 22 is configured to change the output current.

[0079] Specifically, the voltage conversion circuit 21 can integrate Buck circuits, Boost circuits, and Buck-Boost circuit technologies to achieve high-efficiency voltage conversion. Furthermore, the voltage conversion circuit 21 includes a voltage conversion chip with an integrated feedback amplification circuit. Its feedback circuit can be adjusted using external software (e.g., a main control component), and the PWM signal of the internal switch is adjusted in real time via an internal comparator to change the output voltage, achieving a stable voltage output. For example, the voltage conversion chip operates in a voltage range of 3-15V and outputs in a voltage range of 5-24V.

[0080] The current control circuit 22 may include a feedback circuit and a current control chip. The feedback circuit can detect the magnitude of the output current in real time and feed it back to the comparator inside the current control chip to achieve a constant current output. Similarly, its feedback circuit can be controlled by external software (e.g., a main control component) to change different output currents and achieve stable output of different currents. For example, the current control chip has an operating voltage range of 5-24V and a constant current output range of 0.5-3A.

[0081] See Figure 2Optionally, the charging circuit also includes a wireless charging circuit 90; the wireless charging circuit 90 is connected to the main control component 10.

[0082] Optionally, the wireless charging circuit 90 may include a wireless charging chip to regulate the charging current and charging voltage of the wireless charging.

[0083] Specifically, when the main control component 10 detects that an external charger is connected to the power input, the wireless charging uses the default charging voltage and charging current set by the wireless charging chip to wirelessly charge the digital product, and the power supply voltage is provided by the external power source.

[0084] When the main control component 10 detects that no external charger is connected to the power input, the wireless charging uses the default charging voltage and charging current set by the wireless charging chip to wirelessly charge the digital product, and the power supply voltage is provided by the battery component 50.

[0085] In other words, digital products can only use indirect charging mode when wirelessly charging.

[0086] See also Figure 2 Optionally, the charging circuit also includes a current-limiting resistor R1 connected between the power input and the main control component 10. The current-limiting resistor R1 is configured to protect the main control component 10.

[0087] Figure 6 For a schematic diagram of another charging circuit provided in an embodiment of the present invention, see [link / reference]. Figure 6 Optionally, based on the above embodiments, the charging circuit further includes a temperature detection circuit 80;

[0088] The temperature detection circuit 80 is connected to the main control component 10. The temperature detection circuit 80 is configured to detect the temperature of the device to be charged during the charging process after the charging output port is connected to the device to be charged, and transmit the temperature to the main control component 10.

[0089] Specifically, the temperature detection circuit 80 may include an infrared temperature sensor to detect temperature based on infrared temperature measurement technology, and the temperature detection circuit 80 maintains a detection state throughout the charging process to monitor the casing temperature of the digital product being charged at all times.

[0090] Optionally, the charging circuit also includes a first indicator light 100; the first indicator light 100 is connected to the main control component 10, and the first indicator light 100 is configured to indicate temperature. For example, the first indicator light 100 includes a red LED configured as a temperature warning.

[0091] Optionally, the charging circuit also includes an alarm component 102, which is connected to the main control component 10. For example, the alarm component 102 may include a buzzer.

[0092] Specifically, when the temperature reaches the set temperature value, the red LED light turns on and flashes continuously, entering the charging warning state. The main control component 10 controls the first transistor M1 or the second transistor M2 to directly reduce the charging voltage and charging current, entering the low-power charging state. When the temperature exceeds the set temperature value by more than 5°C, the red LED light flashes rapidly and the buzzer sounds an alarm. The main control component 10 controls the first transistor M1 or the second transistor M2 to turn off, so that the charging circuit stops charging.

[0093] Optionally, the charging circuit also includes a second indicator light 101; the second indicator light 101 is connected to the main control component 10, and the second indicator light 101 is configured to illuminate when the charging circuit is not in a protected state. For example, the second indicator light 101 includes a green LED, configured to indicate normal operation.

[0094] Specifically, when the battery pack 50 or the external charger supplies power to the charging circuit, the green LED flashes, indicating that charging can begin. When the output interface is connected to a digital product or the wireless charging circuit is placed in the charging product, the green LED stays on, and charging begins. If there are no abnormalities during the charging process, charging continues until the charging is complete, at which point the green LED will flash again, indicating that charging is finished.

[0095] In summary, the charging circuit provided in this embodiment of the invention can be powered by a built-in battery assembly or by an external charger. When the battery charging and discharging control circuit detects that there is no external power supply at the power input, the charging circuit is switched to power supply from the built-in battery assembly. Using the stored energy in the battery assembly, wireless or wired charging functions are achieved, suitable for outdoor use such as business trips and travel. Furthermore, during battery charging, the charging control circuit can adjust the charging voltage and current in real time, enabling wide-range power supply and improving energy utilization. By setting the battery assembly to a large-capacity battery, it can meet the power needs of outdoor use. When the battery charging and discharging control circuit detects that there is external power supply at the power input, the charging circuit is switched to power supply from the external charger, achieving wireless or wired charging functions. Simultaneously, it can charge the battery assembly, suitable for indoor use in homes or workplaces. Moreover, since the charging circuit includes a temperature detection circuit, it can perform real-time temperature detection and implement charging protection functions based on the temperature, preventing accidents during charging. In other words, the charging circuit provided by this invention is compatible with different types of power supply components, enriching its application scenarios and thus expanding the application scenarios of charging devices based on this charging circuit.

[0096] The charging circuit provided by this invention, by incorporating a touchscreen control component, can directly set corresponding charging modes based on the different charging components connected to the power input. This is beneficial when users use the original charger, allowing them to select a direct charging mode via the touchscreen control component, bypassing the adjustment functions for charging current and voltage, and directly charging with the original charger. In this case, the temperature detection circuit only detects the temperature of the digital product, retaining only the temperature protection function, thus reducing the power consumption of the power bank. Furthermore, the charging circuit provided by this invention can convert the voltage of a conventional charger to the required charging voltage, therefore it can be applied to electronic products with unconventional charging voltages and currents.

[0097] The present invention also provides a portable foldable charging device, which includes the charging circuit provided in any of the above embodiments, and thus has corresponding beneficial effects.

[0098] Figure 7 This is a schematic diagram of the structure of a portable foldable charging device provided in an embodiment of the present invention. Figure 8 This is an unfolded view of a portable, foldable charging device provided in an embodiment of the present invention. Figure 9 This is an assembly diagram of a portable, foldable charging device provided in an embodiment of the present invention. Figure 10 An assembly diagram of another portable foldable charging device provided in an embodiment of the present invention. Figure 11 This is a front view of a portable, foldable charging device after folding, provided in an embodiment of the present invention. Figure 12 This is a reverse view of a portable foldable charging device provided in an embodiment of the present invention after folding.

[0099] See Figure 7 and Figure 8 The power input J1, main control component, charging control circuit, first switch, and second switch are integrated on the circuit board. The portable foldable charging device also includes a cover plate 610 and a bottom shell 620, which are hinged together, and the circuit board is disposed on the cover plate 610 or the bottom shell 620.

[0100] The portable foldable charging device also includes a folding hinge 700, which is a foldable hinge that enables the charging device structure to be folded in half, making it convenient to carry around.

[0101] See Figure 7 , Figure 9 and Figure 11 , Figure 11 The diagram shows a folded charging device with the display screen 710 facing forward, at which point the circuit board is mounted on the cover plate 610.

[0102] See Figure 7 and Figure 9Optionally, the cover plate 610 includes a first upper cover 611 and a first lower cover 612; the first upper cover 611, the circuit board 300 and the first lower cover 612 are stacked.

[0103] Optionally, the charging circuit also includes a touch screen control component 70, an alarm component 102, a first indicator light 100, and a second indicator light 101; the power input J1, the touch screen control component, the alarm component 102, the first indicator light 100, and the second indicator light 101 are disposed on the first upper cover 611.

[0104] Optionally, the touch screen control assembly includes a display screen 710, and the display screen 710, a first upper cover 611, a circuit board 300, and a first lower cover 612 are stacked together.

[0105] Specifically, the first top cover 611 includes a first opening, a second opening, a third opening, a fourth opening, and a fifth opening. The first opening is used to set up a power input port J1, the second opening is used to set up a display screen 710, the third opening is used to set up a second indicator light 101, the fourth opening is used to set up a first indicator light 100, and the fifth opening is used to set up an alarm component 102.

[0106] See Figure 7 , Figure 10 and Figure 12 , Figure 12 The diagram shows a folded charging device with the heat sink 810 facing backwards.

[0107] See Figure 7 and Figure 10 Optionally, the charging circuit also includes a battery assembly 50 and a wireless charging circuit 90; a circuit board 300 is disposed on a cover plate 610, and the wireless charging circuit 90 and the battery assembly 50 are stacked on a bottom shell 620.

[0108] Optionally, the bottom cover 620 includes a second upper cover 621 and a second lower cover 622; the second upper cover 621, the wireless charging circuit 90, the battery assembly 50, and the second lower cover 622 are stacked.

[0109] Optionally, the portable foldable charging device further includes a heat dissipation platform 800; the heat dissipation platform 800 is stacked with a second upper cover 621. The heat dissipation platform 800 includes a heat sink 810, and the heat sink 810, the second upper cover 621, the wireless charging circuit 90, the battery assembly 50, and the second lower cover 622 are stacked together. The heat sink 810 is made of a special heat dissipation material, which can effectively achieve natural heat dissipation. By incorporating the heat sink 810, it can be applied to products that easily overheat during charging, avoiding the problem of overheating during charging in some existing electronic products with generally poor quality and performance, thus ensuring the safety of the charging process.

[0110] Optionally, the charging circuit also includes a temperature detection circuit 80; the temperature detection circuit 80 is disposed on the second upper cover 621.

[0111] Specifically, the second top cover 621 includes a sixth opening, which is used to house the temperature detection circuit 80. The infrared temperature measurement circuit 80 can be placed at the center of the second top cover 621 (charging platform), and can detect the temperature of the casing of the digital product being charged in real time, and feed the temperature data back to the main control component, which then performs corresponding processing actions based on the temperature data.

[0112] Optionally, the charging output port J2 is connected to the main control component via a wiring harness; wherein the charging output port J2 includes at least two of the following: a Type-C interface, a Lightning interface, and a Micro USB interface. Figure 7 The example provided shows that the charging output port J2 includes a Type-C interface, a Lightning interface, and a Micro USB interface, which means it combines the three interfaces commonly used in most digital products on the market. It can be directly matched with the vast majority of products, further improving its compatibility, and can also be used for Type-C charger interface adapters.

[0113] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0114] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A charging circuit, characterized in that, include: Power input port and charging output port; The main control component, wherein the power supply terminal of the main control component is connected to the power input port; A charging control circuit is connected to the main control component and the charging output port. The charging control circuit is configured to control the charging voltage and charging current of the charging output port. A first switch and a second switch, wherein the first switch is connected to the power input port and the charging output port; The second switch is connected to the power input port and the input terminal of the charging control circuit, and the output terminal of the charging control circuit is connected to the charging output port; the control terminals of the first switch and the second switch are connected to the main control component, and the main control component is configured to control the first switch and the second switch to be turned on or off.

2. The charging circuit according to claim 1, characterized in that, Also includes: Battery components and battery charging / discharging control circuitry; The battery assembly is connected to the first terminal of the battery charge / discharge control circuit, the second terminal of the battery charge / discharge control circuit is connected to the power input, and the third terminal of the battery charge / discharge control circuit is connected to the main control assembly.

3. The charging circuit according to claim 1, characterized in that, The charging control circuit includes: A voltage conversion circuit connects the main control component and the second switch; A current control circuit is connected to the voltage conversion circuit and the charging output port, and the current control circuit is configured to change the output current.

4. The charging circuit according to claim 1, characterized in that, Also includes: Touchscreen control components; The touch screen control component is connected to the main control component, and the touch screen control component is configured to set the charging mode of the charging circuit; wherein, the charging mode includes a direct charging mode and an indirect charging mode.

5. The charging circuit according to claim 2, characterized in that, Also includes: Temperature detection circuit; The temperature detection circuit is connected to the main control component. The temperature detection circuit is configured to detect the temperature of the device to be charged during the charging process after the charging output port is connected to the device to be charged, and transmit the temperature to the main control component.

6. The charging circuit according to claim 5, characterized in that, Also includes: Wireless charging circuit; The wireless charging circuit is connected to the main control component.

7. The charging circuit according to claim 5, characterized in that, Also includes: First indicator light; The first indicator light is connected to the main control component, and the first indicator light is configured to indicate the temperature.

8. The charging circuit according to claim 1, characterized in that, Also includes: Second indicator light; The second indicator light is connected to the main control component, and the second indicator light is configured to light up when the charging circuit is not in a protected state.

9. The charging circuit according to claim 1 or 5, characterized in that, Also includes: An alarm component is connected to the main control component.

10. The charging circuit according to claim 1, characterized in that, Both the first switch and the second switch include transistors, and the control electrode of the transistors is connected to the main control component; The main control component is configured to control the transistor in the first switch to turn on when the charging mode of the charging circuit is direct charging mode, and the main control component is configured to control the transistor in the second switch to turn on when the charging mode of the charging circuit is indirect charging mode.

11. A portable, foldable charging device, characterized in that, Includes the charging circuit according to any one of claims 1-10; The power input, the main control component, the charging control circuit, the first switch, and the second switch are integrated on the circuit board; The portable, foldable charging device also includes: A cover plate and a bottom shell are hinged together, and the circuit board is disposed on the cover plate or the circuit board is disposed on the bottom shell.

12. The portable foldable charging device according to claim 11, characterized in that, The charging circuit also includes a battery assembly and a wireless charging circuit. The circuit board is disposed on the cover plate, and the wireless charging circuit and the battery assembly are stacked on the bottom shell.

13. The portable foldable charging device according to claim 12, characterized in that, The cover plate includes a first upper cover and a first lower cover; the first upper cover, the circuit board, and the first lower cover are stacked together. The bottom shell includes a second upper cover and a second lower cover; the second upper cover, the wireless charging circuit, the battery assembly and the second lower cover are stacked.

14. The portable foldable charging device according to claim 13, characterized in that, The charging circuit also includes a touch screen control component, an alarm component, a first indicator light, and a second indicator light; The power input, the touch screen control component, the alarm component, the first indicator light, and the second indicator light are located on the first upper cover.

15. The portable foldable charging device according to claim 13, characterized in that, Also includes: Heat dissipation platform; The heat dissipation platform is stacked with the second upper cover.

16. The portable foldable charging device according to claim 13, characterized in that, The charging circuit also includes a temperature detection circuit. The temperature detection circuit is located on the second upper cover.

17. The portable foldable charging device according to claim 13, characterized in that, The charging output port is connected to the main control component via a wiring harness; The charging output port includes at least two of the following: a Type-C interface, a Lightning interface, and a Micro USB interface.

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