Extension line socket with charging information display function and charging control method

Abstract

The invention discloses an extension line socket with a charging information display function and a charging control method, and relates to the technical field of sockets. After a power supply is powered on, a core chip MCU is controlled to initialize each charging output port which can be used as a communication port; then detecting the equipment access condition of each charging output port and the charging power requested by each access equipment, and intelligently distributing the charging power of each port through a control core chip MCU (Microprogrammed Control Unit); real-time charging data of each port is sampled and is displayed on the display screen after being processed by the control core chip MCU, and charging information of each charging port can be displayed through the display screen, so that a user can fully master the charging state of each charging device, and the user experience is greatly enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of sockets, and in particular to an extension cord socket with a charging information display function and a charging control method. Background Art

[0002] Many extension cords come with adapters that have a charging output function, such as the Chinese utility model "A triangular upright socket" with announcement number CN210838229U, which is equipped with two USB ports, "the power adapter is also integrated into the socket, and the USB ports are also on the side, staggered at different angles, which is convenient for charging various digital products, greatly facilitating users." However, these adapters only have a single charging function, lack information interaction with users, and have a poor user experience. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0004] To achieve the above object, the present invention provides the following technical solution: an extension cord socket with a charging information display function, comprising The AC-DC power conversion circuit includes a PWM control chip U1, a field effect transistor Q1 and a transformer T1. The AC-DC power conversion circuit rectifies and filters the input AC power into DC power, and then controls the switch of the field effect transistor Q1 through the PWM control chip U1, so that the transformer T1 transmits energy to the secondary. The charging voltage conversion circuit includes a plurality of groups of DC-DC conversion circuits, each group of DC-DC circuits has a corresponding control chip and a charging output port; the charging voltage conversion circuit performs protocol recognition with the power-consuming device, converts the output voltage of the AC-DC power conversion circuit into a charging output voltage, and outputs the power to the power-consuming device through the charging output port; The MCU control core and screen drive circuit communicate with the control chip in each DC-DC conversion circuit to obtain the device access status and charging output power parameters of each charging output port in real time. After processing, the charging status of the charging output port of each DC-DC conversion circuit is displayed on the connected display screen.

[0005] As a further solution of the present invention: each group of DC-DC conversion circuits also includes a switching field effect transistor, a step-down inductor, and an output voltage and current signal circuit.

[0006] As a further solution of the present invention: the AC-DC power conversion circuit also includes Input EMC suppression components: common mode inductors LF1, LF2, X capacitor CX1; Input filter rectifier components: rectifier bridge stacks BD1, BD2, electrolytic capacitors C1, C2, C3, C4, differential mode inductor L1; Secondary synchronous rectification device: synchronous rectification control chip U3, field effect tube Q2; Secondary filter electrolytic capacitors C13, C14.

[0007] As a further solution of the present invention: the AC-DC power conversion circuit also includes feedback control sampling devices: resistors R27, R28, R29, R30, R31, chip optocoupler U2, 431 chip U4.

[0008] As a further solution of the present invention: the MCU control core and screen driving circuit include a control core chip MCUU13, peripheral chip resistors R74-R87, chip capacitor C104, and display screen terminal J7, and are connected to the display screen through the display screen terminal J7.

[0009] As a further solution of the present invention: when multiple charging output ports have power-consuming devices connected, The MCU control core and screen drive circuit also obtain the charging power requested by each connected device and perform intelligent power allocation for scenarios where multiple devices are plugged in at the same time; The charging voltage conversion circuit is also configured to perform protocol identification with the power-consuming device, and then convert the output voltage of the AC-DC power conversion circuit into the voltage required for the power-consuming device according to the allocation of the MCU control core and the control core chip MCU of the screen drive circuit, and then output the power to the power-consuming device.

[0010] The present invention also provides the following technical solution: a charging control method, applied to the above-mentioned extension cord socket with charging information display function, the specific steps of the method are: After the power is turned on, the control core chip MCU first initializes each charging output port that can be used as a communication port, then detects the device access status of each charging output port and the charging power requested by each connected device, and intelligently allocates the charging power of each port through the control core chip MCU; The real-time charging data of each port is sampled and displayed on the display screen after being processed by the control core chip MCU.

[0011] As a further solution of the present invention: each charging output port is configured with a corresponding maximum output power; When the charging power requested by the access device connected to the charging output port is greater than the maximum output power of the port, the maximum output power is output; when the charging power requested by the access device connected to the charging output port is less than or equal to the maximum output power of the port, the requested charging power is output.

[0012] As a further solution of the present invention: when there are devices connected to at least two charging output ports, based on the charging powers Y1-Yn requested by the connected devices of different charging output ports, and when (Y1+Y2+......+Yn) is greater than the allocatable output power X1, power is allocated to multiple connected charging output ports in proportion within the allocatable output power X1, and the output power allocated to each charging output port is (Y / (Y1+Y2+......+Yn))*X1, where Y is the charging power requested by the corresponding connected device.

[0013] As a further solution of the present invention: the MCU control core and the screen driving circuit also obtain the minimum charging power requested by each connected device. When (Y1+Y2+......+Yn) is greater than the total allocated power Xmax, power is allocated to the charging output ports with an earlier access sequence according to the access sequence of the power users at different charging output ports, and the allocated output power is made the minimum charging power of the connected power users; when all the connected power users are allocated the corresponding minimum charging power, the redundant allocable output power X1 is allocated to multiple connected charging output ports in proportion.

[0014] Compared with the prior art, the beneficial effects of this technical solution are: the charging information of each charging port can be displayed through the display screen, so that the user can fully understand the charging status of each charging device, greatly enhancing the user experience.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 is a circuit block diagram of the present invention; Figure 2 is a circuit schematic diagram of the AC-DC power conversion circuit in the present invention; Figure 3 It is a circuit principle diagram of a group of DC-DC conversion circuits of the charging voltage conversion circuit of the present invention; Figure 4 It is a circuit schematic diagram of the MCU control core and the screen drive circuit in the present invention; Figure 5 It is a flow chart of the charging control method of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-5 , an extension cord socket with charging information display function, including an AC-DC power conversion circuit, a charging voltage conversion circuit, an MCU control core, a screen driving circuit and a display screen.

[0020] The AC-DC power conversion circuit includes a PWM control chip U1, a field effect transistor Q1 and a transformer T1; the AC-DC power conversion circuit rectifies and filters the input AC power into DC power, and then controls the switch of the field effect transistor Q1 through the PWM control chip U1, so that the transformer T1 transmits energy to the secondary.

[0021] The charging voltage conversion circuit includes multiple groups of DC-DC conversion circuits, each group of DC-DC circuits has a corresponding control chip and a charging output port; the charging voltage conversion circuit performs protocol recognition with the electrical equipment, converts the output voltage of the AC-DC power conversion circuit into a charging output voltage, and outputs the power to the electrical equipment through the charging output port.

[0022] The MCU control core and screen drive circuit communicate with the control chip in each DC-DC conversion circuit to obtain the device access status and charging output power parameters of each charging output port in real time. After processing, the charging status of the charging output port of each DC-DC conversion circuit is displayed on the connected display screen.

[0023] The display screen can show the charging information of each charging port (including charging power), allowing users to fully understand the charging status of each charging device, greatly enhancing the user experience.

[0024] In some embodiments, each set of DC-DC conversion circuits further includes a switching field effect transistor, a step-down inductor, and an output voltage and current signal circuit.

[0025] In some embodiments, the AC-DC power conversion circuit further includes Input EMC suppression components: common mode inductors LF1, LF2, X capacitor CX1; Input filter rectifier components: rectifier bridge stacks BD1, BD2, electrolytic capacitors C1, C2, C3, C4, differential mode inductor L1; Secondary synchronous rectification device: synchronous rectification control chip U3, field effect tube Q2; Secondary filter electrolytic capacitors C13, C14.

[0026] Preferably, the AC-DC power conversion circuit further includes a feedback control sampling device (set on the secondary side of the transformer T1): resistors R27, R28, R29, R30, R31, SMD optocoupler U2, 431 chip U4. On the secondary side, feedback control is introduced to ensure the stability of the output voltage.

[0027] In some embodiments, the MCU control core and screen driving circuit include a control core chip MCU U13, peripheral chip resistors R74-R87, chip capacitor C104, and display screen terminal J7, and are connected to the display screen through the display screen terminal J7.

[0028] In some embodiments, when multiple charging output ports have power-consuming devices connected, the MCU control core and the screen driving circuit also obtain the charging power requested by each connected device, and perform intelligent power allocation for scenarios where multiple devices are plugged in at the same time; the charging voltage conversion circuit is also configured to perform protocol identification with the power-consuming device, and then convert the output voltage of the AC-DC power conversion circuit into the voltage required for the power-consuming device based on the allocation of the MCU control core and the control core chip MCU U13 of the screen driving circuit, and then output power to the power-consuming device.

[0029] In this embodiment, in the extension cord socket with charging information display function in the above embodiment, a charging control method is also proposed, and the specific steps of the method are: After the power is turned on, the control core chip MCU first initializes each charging output port that can be used as a communication port, then detects the device access status of each charging output port and the charging power requested by each access device, and intelligently distributes the charging power of each port through the control core chip MCU; at the same time, the real-time charging data of each port (including the power size) is sampled, and the control core chip MCU processes it and displays it on the display screen. The display screen can display the charging information (including the charging power) of each charging port, allowing users to fully understand the charging status of each charging device, greatly enhancing the user experience In some embodiments, when only one charging output port is connected to a device, within the maximum charging output power X allowed by the charging output port, the actual maximum charging output power Z1 is output according to the charging power Y1 requested by the connected device, where when Y1>X, Z1≤X; when Y1≤X, Z1≤Y1. For example, if the maximum output power allowed by the charging output port is 100W, when the charging power Y1 requested by the connected device is 120W, the output power is 100W; when the charging power Y1 requested by the connected device is 80W, the output power is 80W.

[0030] In some embodiments, each charging output port is configured with a corresponding maximum output power. When the charging power requested by the access device connected to the charging output port is greater than the maximum output power of the port, the maximum output power is output; when the charging power requested by the access device connected to the charging output port is less than or equal to the maximum output power of the port, the requested charging power is output.

[0031] In some embodiments, when there are devices connected to at least two charging output ports, based on the charging powers Y1-Yn requested by the connected devices of different charging output ports, and when (Y1+Y2+......+Yn) is greater than the allocatable output power X1, power is allocated to multiple connected charging output ports in proportion within the allocatable output power X1, and the output power allocated to each charging output port is (Y / (Y1+Y2+......+Yn))*X1, where Y is the charging power requested by the corresponding connected device.

[0032] For example, if the charging power Y1 requested by the device connected to the first charging output port is 120W, the charging power Y2 requested by the device connected to the second charging output port is 80W, and the allocable output power X1 is 100W, then: The output power allocated to the first charging output port is (120 / (80+120))*100=60W; The output power allocated to the second charging output port is (80 / (80+120))*100=40W.

[0033] In some embodiments, when there are devices connected to at least two charging output ports, the MCU control core and the screen driving circuit obtain the charging power Y1-Yn requested by the connected devices of each charging output port, and also obtain the minimum charging power requested by each connected device. When (Y1+Y2+......+Yn) is greater than the total allocated power Xmax, power is allocated to the charging output port with an earlier access sequence according to the access sequence of the power users of different charging output ports, and the allocated output power is made the minimum charging power of the connected power users; when all connected power users are allocated the corresponding minimum charging power, the redundant allocatable output power X1 is allocated to multiple connected charging output ports in proportion, that is, the proportion is (Y / (Y1+Y2+......+Yn))*X1, which effectively ensures that the power users that obtain power output can operate normally and the power allocation is more intelligent.

[0034] For example, if the charging power Y1 requested by the access device of the first charging output port is 120W, and the minimum charging power requested is 20W; the charging power Y2 requested by the access device of the second charging output port is 80W, and the minimum charging power requested is 10W, the total allocated power Xmax is 100W, and the redundant allocable output power X1 changes to 100-20-10=70W, then: The output power allocated to the first charging output port is 20+(120 / (80+120))*70=62W; The output power allocated to the second charging output port is 10+(80 / (80+120))*70=38W.

[0035] like Figure 1 As shown, in some embodiments, the extension cord socket has a total of 6 charging output ports, C1 and C2 ports have their own separate DC-DC conversion circuits, C3 and A1 share a set of DC-DC conversion circuits, and C4 and A2 share a set of DC-DC conversion circuits. After the power is turned on, the MCU first initializes each communication port, then detects the device access status of the 6 ports and the charging power requested by each access device, and then intelligently allocates the charging power of each port. At the same time, the real-time charging data of each port is sampled and displayed on the display after being processed by the MCU.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An extension cord socket with a charging information display function, characterized in that: include The AC-DC power conversion circuit includes a PWM control chip U1, a field effect transistor Q1 and a transformer T1. The AC-DC power conversion circuit rectifies and filters the input AC power into DC power, and then controls the switch of the field effect transistor Q1 through the PWM control chip U1, so that the transformer T1 transmits energy to the secondary. A charging voltage conversion circuit, including a plurality of groups of DC-DC conversion circuits, each group of DC-DC circuits having a corresponding control chip and a charging output port; The charging voltage conversion circuit performs protocol recognition with the power-consuming device, converts the output voltage of the AC-DC power conversion circuit into a charging output voltage, and supplies power to the power-consuming device through the charging output port; The MCU control core and screen drive circuit communicate with the control chip in each DC-DC conversion circuit to obtain the device access status and charging output power parameters of each charging output port in real time. After processing, the charging status of the charging output port of each DC-DC conversion circuit is displayed on the connected display screen.

2. The extension cord socket with charging information display function according to claim 1, characterized in that: Each set of DC-DC conversion circuits also includes a switching field effect transistor, a step-down inductor, and an output voltage and current signal circuit.

3. The extension cord socket with charging information display function according to claim 1, characterized in that: The AC-DC power conversion circuit also includes Input EMC suppression components: common mode inductors LF1, LF2, X capacitor CX1; Input filter rectifier components: rectifier bridge stacks BD1, BD2, electrolytic capacitors C1, C2, C3, C4, differential mode inductor L1; Secondary synchronous rectification device: synchronous rectification control chip U3, field effect tube Q2; Secondary filter electrolytic capacitors C13 and C14.

4. The extension cord socket with charging information display function according to claim 3, characterized in that: The AC-DC power conversion circuit also includes Feedback control sampling devices: resistors R27, R28, R29, R30, R31, SMD optocoupler U2, 431 chip U4.

5. The extension cord socket with charging information display function according to claim 1, characterized in that: MCU control core and screen drive circuit include The control core chip MCU U13, the peripheral chip resistors R74-R87, the chip capacitor C104, and the display terminal J7 are connected to the display screen through the display terminal J7.

6. The extension cord socket with charging information display function according to any one of claims 1 to 5, characterized in that: When multiple charging output ports have power-consuming devices connected, The MCU control core and screen drive circuit also obtain the charging power requested by each connected device and perform intelligent power allocation for scenarios where multiple devices are plugged in at the same time; The charging voltage conversion circuit is also configured to perform protocol identification with the power-consuming device, and then convert the output voltage of the AC-DC power conversion circuit into the voltage required for the power-consuming device according to the allocation of the MCU control core and the control core chip MCU of the screen drive circuit, and then output the power to the power-consuming device.

7. A charging control method, characterized in that: The specific steps of the method are: After the power is turned on, the control core chip MCU first initializes each charging output port that can be used as a communication port, then detects the device access status of each charging output port and the charging power requested by each connected device, and intelligently allocates the charging power of each port through the control core chip MCU; The real-time charging data of each port is sampled and displayed on the display screen after being processed by the control core chip MCU.

8. The charging control method according to claim 7, characterized in that: Each charging output port is configured with a corresponding maximum output power; When the charging power requested by the access device connected to the charging output port is greater than the maximum output power of the port, the maximum output power is output; when the charging power requested by the access device connected to the charging output port is less than or equal to the maximum output power of the port, the requested charging power is output.

9. The charging control method according to claim 7, characterized in that: When there are devices connected to at least two charging output ports, based on the charging powers Y1-Yn requested by the connected devices of different charging output ports, and when (Y1+Y2+......+Yn) is greater than the allocatable output power X1, power is allocated to multiple connected charging output ports in proportion within the allocatable output power X1. The output power allocated to each charging output port is (Y / (Y1+Y2+......+Yn))*X1, where Y is the charging power requested by the corresponding connected device.

10. The charging control method according to claim 9, characterized in that: The MCU control core and the screen driving circuit also obtain the minimum charging power requested by each connected device. When (Y1+Y2+......+Yn) is greater than the total allocated power Xmax, the power is allocated to the charging output ports with an earlier access sequence according to the access sequence of the power users at different charging output ports, and the allocated output power is made the minimum charging power of the connected power users. When all connected power users are allocated the corresponding minimum charging power, the redundant allocable output power X1 is allocated to multiple connected charging output ports in proportion.

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