Charging device

Abstract

The utility model relates to the technical field of mobile phone accessories, in particular to a charging device. Comprising a first connector and a second connector, and the first connector comprises a first shell, a power plug arranged on the first shell and an AC-DC module arranged in the first shell; the second connector comprises a second shell, an equipment interface arranged on the second shell and a protocol module arranged in the second shell; the voltage output end of the AC-DC module is connected with the voltage input end of the protocol module; the AC-DC control part and the protocol control part are independently packaged through the first shell and the second shell respectively to form the independent first connector and the independent second connector, the safety distance is met, and large layout space is provided for circuit design on the aspects of heat dissipation stability, compatibility and various authentication standards and requirements; the first connector can be connected with various second connectors with different charging protocol control according to actual requirements, and an AC-DC control part does not need to be repeatedly arranged and designed.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phone accessories, in particular to a charging device. Background Art

[0002] A fast charging head is a charging adapter for fast charging devices. A fast charging head usually requires a specific charging cable and compatible equipment to achieve fast charging. It adopts specific fast charging technology and protocols. In terms of circuit design, the fast charging head usually sets the charging control circuit and the protocol control circuit on the same circuit board or on different connected circuit boards, and encapsulates them in the same shell. When designing a fast charging head, factors such as circuit layout, heat dissipation stability, safety, and equipment compatibility need to be considered. It also needs to comply with relevant safety standards and certification requirements. This makes the internal circuit layout design of the fast charging head very limited, and it is difficult for one fast charging head to be suitable for different powered devices.

[0003] Therefore, it is very important for those skilled in the art to design a charging device with high safety, high stability, strong compatibility and flexible application. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a charging device with high safety, high stability, strong compatibility and flexible application, so as to solve the defects of the existing fast charging charging head that is very limited in the layout design of the internal circuit and is difficult to adapt to different power receiving devices.

[0005] The utility model discloses a charging device, which comprises:

[0006] A first connector comprises a first housing, a power plug arranged on the first housing, and an AC-DC module arranged in the first housing, wherein the power plug is connected to the AC-DC module;

[0007] The second connector comprises a second housing, a device interface disposed on the second housing, and a protocol module disposed in the second housing, wherein the device interface is connected to the protocol module;

[0008] The first connector and the second connector are detachably connected so that the voltage output end of the AC-DC module is connected to the voltage input end of the protocol module.

[0009] Optionally, it further includes a line body, the line body includes a positive line and a negative line, and the AC-DC module and the protocol module are electrically connected through the positive line and the negative line.

[0010] Optionally, the AC-DC module includes a rectifier and filter circuit, a PFC voltage regulating circuit and a PWM control circuit, the voltage input end of the rectifier and filter circuit is connected to an external power supply, the voltage input end of the PFC voltage regulating circuit is connected to the voltage output end of the rectifier and filter circuit, the voltage output end of the PFC voltage regulating circuit is connected to the voltage input end of the PWM control circuit, and the voltage output end of the PFC voltage regulating circuit is connected to the voltage input end of the protocol module.

[0011] Optionally, the PWM control circuit includes a high-frequency quasi-resonant flyback controller and a synchronous rectification controller, the voltage input end of the high-frequency quasi-resonant flyback controller is connected to the voltage output end of the PFC voltage regulation circuit, and the voltage output end of the high-frequency quasi-resonant flyback controller is connected to the voltage input end of the synchronous rectification controller.

[0012] Optionally, the rectifier and filter circuit includes a fuse, a varistor, a rectifier circuit and a filter subcircuit, the fuse and the varistor are arranged at the voltage input end of the rectifier subcircuit, and the voltage output end of the rectifier subcircuit is connected to the voltage input end of the filter subcircuit.

[0013] Optionally, the protocol module includes a DC-DC circuit, a protocol control circuit and an output circuit, the voltage input end of the DC-DC circuit is connected to the voltage output end of the AC-DC module, the voltage output end of the DC-DC circuit is connected to the voltage input end of the protocol control circuit, and the output end of the protocol control circuit is connected to the input end of the output circuit.

[0014] Optionally, the protocol control circuit includes a protocol chip, a voltage input pin of the protocol chip is connected to a voltage output end of the DC-DC circuit, and a current detection pin, a voltage output pin and a CC pin of the protocol chip are all connected to the output circuit.

[0015] Optionally, the output circuit includes at least one TYPE-C interface connected to the output end of the protocol control circuit, and also includes one or more of a USB_A output circuit and a lightning output circuit.

[0016] Optionally, the USB_A output circuit includes a USB_A fast charging protocol chip and a USB interface, the input end of the USB_A fast charging protocol chip is connected to the output end of the protocol chip, and the output end of the USB_A fast charging protocol chip is connected to the USB interface.

[0017] Optionally, the lightning output circuit includes a high-efficiency synchronous buck converter integrated with a dual-channel DCP protocol and a lightning interface, and the lightning interface is connected to the high-efficiency synchronous buck converter.

[0018] Compared with the prior art, the charging device provided by the embodiment of the utility model has the beneficial effect that the AC-DC control part and the protocol control part are separately encapsulated by the first shell and the second shell to form an independent first connector and a second connector, which not only meets the safety distance, but also provides a larger layout space for circuit design in terms of heat dissipation stability, compatibility and various certification standards and requirements; further, the first connector can be connected to various second connectors with different charging protocol controls according to actual needs to realize charging of different powered devices. In the replacement of products, there is no need to repeatedly layout and design the AC-DC control part, which effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 This is a schematic diagram of the structure of the charging device provided by the embodiment of the utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the charging device provided by the embodiment of the utility model. Figure 2 ;

[0022] Figure 3 It is a system block diagram of the AC-DC module and the protocol module provided by the embodiment of the utility model;

[0023] Figure 4 It is a circuit diagram of a PWM control circuit provided by an embodiment of the utility model;

[0024] Figure 5 It is a circuit diagram of a synchronous rectification controller provided by an embodiment of the utility model;

[0025] Figure 6 It is a circuit diagram of a rectifier and filter circuit in an AC-DC module provided by an embodiment of the utility model;

[0026] Figure 7 is a circuit diagram of a DC-DC circuit provided by an embodiment of the utility model;

[0027] Figure 8 It is a circuit diagram of the protocol control circuit and TYPE-C1 provided in the embodiment of the utility model;

[0028] Fig. 9It is a circuit diagram of the TYPE-C2 interface provided by the embodiment of the utility model;

[0029] Fig.10 is a circuit diagram of a USB_A output circuit provided by an embodiment of the utility model;

[0030] Fig.11 It is a circuit diagram of a lightning output circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0032] like Figures 1 to 7 As shown, the utility model provides a specific embodiment of a charging device.

[0033] A charging device, reference Figure 1 and Figure 2 The charging device includes a first connector 1 and a second connector 2. The first connector 1 includes a first shell 11, a power plug 12 arranged on the first shell 11, and an AC-DC module 13 arranged in the first shell 11, and the power plug 12 is electrically connected to the AC-DC module 13; the second connector 2 includes a second shell 21, a device interface 22 arranged on the second shell 21, and a protocol module 23 arranged in the second shell 21, and the device interface 22 is electrically connected to the protocol module 23.

[0034] The voltage output terminal of the AC-DC module 13 is connected to the voltage input terminal of the protocol module 23 .

[0035] Specifically, refer to Figure 1 and Figure 2 The power plug 12 is used to connect an external power source to obtain an external AC voltage; the power plug 12 is a two-pin flat plug, a triangular flat plug, a two-pin round plug or a three-pin round plug, etc.; the AC-DC module 13 is used to rectify, filter and transform the external AC voltage to output a stable DC voltage; the AC-DC module 13 is encapsulated inside the first shell 11, one end of the power plug 12 is electrically connected to the AC-DC module 13, and the other end of the power plug 12 passes through the first shell 11 and is exposed outside the first shell 11.

[0036] Further, refer to Figure 1 and Figure 2The device interface 22 includes one or more of a TYPE-C interface, a USB_A interface, and a lightning interface, etc., for connecting a powered device to supply power to the powered device; the protocol module 23 is used to control the charging protocol, and by communicating the protocol between the powered device and the charging device during the charging process, to ensure that the charging process is efficient, safe, and meets the charging requirements of the powered device; the protocol module 23 is encapsulated inside the second shell 21, and the device interface 22 is electrically connected to the protocol module 23 and exposed on the surface of the second shell 21.

[0037] Further, refer to Figure 1 and Figure 2 The first connector 1 and the second connector 2 are packaged separately, so that the first connector 1 with the AC-DC module can be connected to various second connectors 2 with different charging protocol controls to realize charging of different powered devices.

[0038] Among them, reference Figure 1 and Figure 2 The second connector is also provided with a TYPE-C connector 24 for connecting to an external TYPE-C interface.

[0039] In the circuit design of existing chargers, the charging control circuit and the protocol control circuit 232 are usually set on the same circuit board or on different connected circuit boards, and are packaged in the same housing. In the circuit design, factors such as circuit layout, heat dissipation stability, safety, and equipment compatibility need to be considered, and relevant safety standards and certification requirements need to be met. This makes the layout design of the internal circuit of the charger very limited, and one charging head is difficult to be suitable for different powered devices. The powered devices are constantly updated, and each manufacturer needs to continuously design and produce complete charging heads that are compatible with the powered devices, which is not only a large investment but also time-consuming and labor-intensive.

[0040] In this embodiment, the AC-DC control part and the protocol control part are separately encapsulated by the first shell and the second shell to form independent first connectors and second connectors, which not only meet the safety distance, but also provide a larger layout space for circuit design in terms of heat dissipation stability, compatibility, and various certification standards and requirements; further, the first connector can be connected to various second connectors with different charging protocol controls according to actual needs to realize charging of different powered devices. In the upgrading of products, there is no need to repeatedly layout and design the AC-DC control part, which effectively reduces the production cost.

[0041] In one embodiment, reference Figure 1 and Figure 2 The charging device also includes a line body 3, which includes a positive line and a negative line. The AC-DC module 13 and the protocol module 23 are electrically connected through the positive line and the negative line.

[0042] Specifically, refer to Figure 1 and Figure 2 The line body 3 only includes a positive line and a negative line, which are used to transmit the electric energy of the first connector 1 to the second connector 2; it should be noted that the line body 3 is only used for power supply and not for data transmission.

[0043] In one embodiment, reference Figure 2 and Figure 3 The AC-DC module 13 includes a rectifier and filter circuit 131, a PFC voltage regulating circuit 132 and a PWM control circuit 133. The voltage input end of the rectifier and filter circuit 131 is connected to an external power supply, the voltage input end of the PFC voltage regulating circuit 132 is connected to the voltage output end of the rectifier and filter circuit 131, the voltage output end of the PFC voltage regulating circuit 132 is connected to the voltage input end of the PWM control circuit 133, and the voltage output end of the PFC voltage regulating circuit 132 is connected to the voltage input end of the protocol module 23.

[0044] Specifically, refer to Figure 2 and Figure 3 The rectifier and filter circuit 131 can convert the AC signal into a DC signal to ensure that the output signal has the same voltage polarity, so that the subsequent circuit can correctly process the DC signal. It can also remove the fluctuation and AC component in the DC signal to reduce the ripple and noise in the output signal, making the output DC signal more stable. The PFC voltage regulation circuit 132 is used to improve the power factor of the power supply system. It controls the input current waveform and synchronizes it with the input voltage waveform to improve the power factor of the entire system. The improvement of the power factor can not only reduce the loss in the power supply system, thereby improving the efficiency of the entire system; it can also make the power factor of the power supply system meet regulatory requirements.

[0045] Further, refer to Figure 2 and Figure 3 The PWM control circuit 133 is used to control the output voltage and output current. The output voltage and output current can be controlled by adjusting the pulse width and frequency to ensure that a stable voltage is output to the protocol module 23 to meet the needs of the powered device. Through the pulse width modulation technology, it can control the conduction time of the switching device, reduce energy loss, and improve charging efficiency.

[0046] In one embodiment, reference Figure 3 , Figure 4 and Figure 5The PWM control circuit 133 includes a high-frequency quasi-resonant flyback controller and a synchronous rectification controller. The voltage input end of the high-frequency quasi-resonant flyback controller is connected to the voltage output end of the PFC voltage regulation circuit 132, and the voltage output end of the high-frequency quasi-resonant flyback controller is connected to the voltage input end of the synchronous rectification controller.

[0047] Specifically, refer to Figure 3 , Figure 4 and Figure 5 The high-frequency quasi-resonant flyback controller is used to control the flyback switching power supply. It monitors the input voltage and output voltage and adjusts the working cycle of the switching device as needed to ensure the stability of the output voltage. The high-frequency quasi-resonant flyback controller also has an overload protection function. It monitors the output current and automatically disconnects the switching device when the output current exceeds the set value; the high-frequency quasi-resonant flyback controller also has a short-circuit protection function. It monitors the output short-circuit and disconnects the power supply in time to prevent circuit damage; the high-frequency quasi-resonant flyback controller also has an overvoltage protection function. It monitors the output voltage and automatically cuts off the power supply when the output voltage exceeds the set range.

[0048] Further, refer to Figure 3 , Figure 4 and Figure 5 The high-frequency quasi-resonant flyback controller adopts the SC3023C chip and its peripheral circuits, the synchronous rectification controller adopts the SC3503 chip and its peripheral circuits, the PWM control circuit 133 also includes a transformer, the voltage input end of the transformer is connected to the voltage output end of the PFC voltage regulation circuit 132, the voltage output end of the transformer is connected to the voltage input end of the protocol module 23, the voltage input end of the high-frequency quasi-resonant flyback controller is connected to the primary side of the transformer, and the synchronous rectification controller is connected to the secondary side of the transformer.

[0049] In one embodiment, reference Figure 3 and Figure 6 The rectifier and filter circuit 131 includes a fuse F1, a varistor MOV1, a rectifier circuit and a filter circuit. The fuse F1 and the varistor MOV1 are arranged at the voltage input end of the rectifier circuit, and the voltage output end of the rectifier circuit is connected to the voltage input end of the filter circuit.

[0050] Specifically, refer to Figure 3 and Figure 6 , fuse F1 is used for overload protection. When the current in the circuit exceeds the rated current value of fuse F1, fuse F1 will be blown and cut off the circuit loop to prevent excessive current from damaging circuit components or causing fire; varistor MOV1 is used for overvoltage protection. When overvoltage appears in the circuit, the resistance value of varistor MOV1 will drop rapidly to absorb the overvoltage and shunt it to the ground to protect other electronic components in the circuit from damage.

[0051] Further, refer to Figure 3 and Figure 6 The rectifier subcircuit is used to convert AC signals into DC signals, and the filter subcircuit is used to remove stray signals, interference signals or noise in the circuit, thereby improving the signal quality to ensure the normal operation of the circuit; the filter subcircuit can also be used to remove fluctuations or ripples to make the output signal smoother and more stable.

[0052] In one embodiment, reference Figure 2 and Figure 3 The protocol module 23 includes a DC-DC circuit 231, a protocol control circuit 232 and an output circuit 233. The voltage input end of the DC-DC circuit 231 is connected to the voltage output end of the AC-DC module 13, the voltage output end of the DC-DC circuit 231 is connected to the voltage input end of the protocol control circuit 232, and the output end of the protocol control circuit 232 is connected to the input end of the output circuit 233.

[0053] Specifically, refer to Figure 2 and Figure 3 The DC-DC circuit 231 is mainly used for stepping down the voltage output by the AC-DC module 13 to the voltage required by the powered device. The DC-DC circuit 231 is provided with two step-down controllers with integrated synchronous switches. Figure 7 The buck controller specifically uses the IP6550_FB chip. When supplying power to a powered device, one of the buck controllers can be selected for buck supply or two buck controllers can be selected for buck supply at the same time according to the connected powered device.

[0054] Further, refer to Figure 2 , Figure 3 and Figure 8 The protocol control circuit 232 is used for charging protocol control so that the powered device and the charging device shake hands and realize protocol fast charging; the protocol control circuit 232 includes a protocol chip and its peripheral circuits. The protocol chip can specifically adopt an IP2738 chip. The voltage input pin of the protocol chip is connected to the voltage output end of the DC-DC circuit. The voltage output pin of the protocol chip is connected to the output circuit 233 to output the required voltage. The current detection pin of the protocol chip is connected to the output circuit 233 to obtain the required voltage of the connected device. The CC pin of the protocol chip is connected to the output circuit 233 to realize protocol communication between the powered device and the charging device.

[0055] In one embodiment, reference Figure 2 , Figure 3 , Figure 8 and Fig. 9The output circuit 233 includes at least one TYPE-C interface connected to the output end of the protocol control circuit 232, and also includes one or more of a USB_A output circuit and a lightning output circuit.

[0056] Specifically, refer to Figure 2 , Figure 3 , Figure 8 and Fig. 9 The output circuit 233 includes at least one TYPE-C interface. In this embodiment, the output circuit 233 includes two TYPE-C interfaces, namely a TYPE-C1 interface and a TYPE-C2 interface. Both the TYPE-C1 interface and the TYPE-C2 interface are connected to the output end of the protocol control circuit 232 for connecting to a powered device.

[0057] Further, refer to Figure 2 and Figure 3 The output circuit 233 can also add a USB_A output circuit, the input end of the USB_A output circuit is connected to the output end of the protocol control circuit 232, and the output end of the USB_A output circuit is used to connect external storage devices, mice, keyboards, audio devices and other electronic devices using USB_A plugs.

[0058] Among them, reference Figure 2 , Figure 3 and Fig.10 The USB_A output circuit includes a USB_A fast charging protocol chip and a USB interface. The input end of the USB_A fast charging protocol chip is connected to the output end of the protocol chip, and the output end of the USB_A fast charging protocol chip is connected to the USB interface. The USB_A fast charging protocol chip can specifically adopt an IP2726 chip. The voltage output pin VOUT2 and the voltage output pin VOUT1 of the IP2726 chip are both connected to the voltage input end of the USB interface, and a switching device is also provided between the voltage output pin VOUT2 and the voltage output pin VOUT1 of the IP2726 chip and the voltage input end of the USB interface.

[0059] Further, refer to Figure 2 and Figure 3 The output circuit 233 can also add a lightning output circuit, the lightning output circuit, the voltage input end of the lightning output circuit is connected to the voltage output end of the protocol control circuit 232, the control end of the lightning output circuit is connected to the control end of the protocol control circuit 232, and the voltage output end of the lightning output circuit is used to connect to an external IOS device.

[0060] Among them, reference Figure 2 , Figure 3 and Fig.11The lightning output circuit includes a high-efficiency synchronous buck converter integrated with a dual-channel DCP protocol and a lightning interface, and the lightning interface is connected to the high-efficiency synchronous buck converter; the high-efficiency synchronous buck converter integrated with a dual-channel DCP protocol can specifically adopt an IP6551 chip, and the voltage output pin VOUT of the IP6551 chip is connected to the voltage input end of the lightning interface, and a switching device is arranged between the voltage output pin VOUT of the IP6551 chip and the voltage input end of the lightning interface; to simplify the circuit, the switching device between the voltage output pin of the IP6551 chip and the lightning interface can be shared with the switching device arranged between the voltage output pin of the IP2726 chip and the voltage input end of the USB interface.

[0061] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A charging device, characterized in that: include: A first connector comprises a first housing, a power plug arranged on the first housing, and an AC-DC module arranged in the first housing, wherein the power plug is connected to the AC-DC module; The second connector comprises a second housing, a device interface disposed on the second housing, and a protocol module disposed in the second housing, wherein the device interface is connected to the protocol module; Wherein, the voltage output terminal of the AC-DC module is connected to the voltage input terminal of the protocol module.

2. The charging device according to claim 1, characterized in that: It also includes a line body, which includes a positive line and a negative line. The AC-DC module and the protocol module are electrically connected through the positive line and the negative line.

3. The charging device according to claim 1, characterized in that: The AC-DC module includes a rectifier and filter circuit, a PFC voltage regulating circuit and a PWM control circuit. The voltage input end of the rectifier and filter circuit is connected to an external power supply, the voltage input end of the PFC voltage regulating circuit is connected to the voltage output end of the rectifier and filter circuit, the voltage output end of the PFC voltage regulating circuit is connected to the voltage input end of the PWM control circuit, and the voltage output end of the PFC voltage regulating circuit is connected to the voltage input end of the protocol module.

4. The charging device according to claim 3, characterized in that: The PWM control circuit includes a high-frequency quasi-resonant flyback controller and a synchronous rectification controller, the voltage input end of the high-frequency quasi-resonant flyback controller is connected to the voltage output end of the PFC voltage regulation circuit, and the voltage output end of the high-frequency quasi-resonant flyback controller is connected to the voltage input end of the synchronous rectification controller.

5. The charging device according to claim 3, characterized in that: The rectifier and filter circuit includes a fuse, a varistor, a rectifier circuit and a filter circuit. The fuse and the varistor are arranged at the voltage input end of the rectifier circuit, and the voltage output end of the rectifier circuit is connected to the voltage input end of the filter circuit.

6. The charging device according to claim 1, characterized in that: The protocol module includes a DC-DC circuit, a protocol control circuit and an output circuit. The voltage input end of the DC-DC circuit is connected to the voltage output end of the AC-DC module, the voltage output end of the DC-DC circuit is connected to the voltage input end of the protocol control circuit, and the output end of the protocol control circuit is connected to the input end of the output circuit.

7. The charging device according to claim 6, characterized in that: The protocol control circuit includes a protocol chip, a voltage input pin of the protocol chip is connected to the voltage output end of the DC-DC circuit, and a current detection pin, a voltage output pin and a CC pin of the protocol chip are all connected to the output circuit.

8. The charging device according to claim 7, characterized in that: The output circuit includes at least one TYPE-C interface connected to the output end of the protocol control circuit, and also includes one or more of a USB_A output circuit and a lightning output circuit.

9. The charging device according to claim 8, characterized in that: The USB_A output circuit includes a USB_A fast charging protocol chip and a USB interface. The input end of the USB_A fast charging protocol chip is connected to the output end of the protocol chip, and the output end of the USB_A fast charging protocol chip is connected to the USB interface.

10. The charging device according to claim 8, characterized in that: The lightning output circuit includes a high-efficiency synchronous buck converter integrated with a dual-channel DCP protocol and a lightning interface, and the lightning interface is connected to the high-efficiency synchronous buck converter.

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