CN217692758U - Power socket special for charger - Google Patents

Abstract

The utility model provides a special supply socket of charger, relate to the supply socket field, which comprises a housin, commercial power input interface, commercial power output interface, the input line charges, the charging wire, power module, detect control module, execution module and singlechip, insert the commercial power and with the charger when the socket, the mobile device is connected the back in order electricity, open mobile device OTG power supply through the trigger switch on the closed charging wire, provide initial work electric energy for the socket, the singlechip is gone up the electricity after insert the charger with the commercial power through control execution module and send charging current to the mobile device, when the singlechip passes through the current value that detects control module and survey and satisfies the predetermined condition, singlechip control execution module cuts off charger and mains connection, thereby it is inconvenient to have overcome current charger and insert the commercial power operation, untimely disconnection commercial power's not enough, still be connected with the component and bring the electric energy waste when having avoided the charger idle, unnecessary ageing and potential safety hazard of commercial power.

Description

Power socket special for charger

Technical Field

The utility model relates to a supply socket field, concretely relates to special supply socket of charger.

Background

With the high popularity of mobile devices such as mobile phones, tablet computers, and notebook computers, chargers are used in large quantities as indispensable accessories, some sockets sold in the market do not have a power-off function, and when the charger is plugged into a power socket and is idle, although there is no output, the internal circuit still works, and when the charger is not timely pulled out from the socket after the mobile device is fully charged or used, unnecessary power consumption, premature aging failure of devices, and even fire hazard are caused.

Some sockets with power-off functions on the market need to manually set on-off time or manually operate a mechanical switch to disconnect the electric connection between the charger and the mains supply, so that the socket cannot be fully charged or disconnected, and the inconvenience in operation can cause many people to forget or be idle in using the power-off function of the socket.

Some commercially available sockets with a power-off function can disconnect the electrical connection between the connected electrical appliance and the mains supply, but do not disconnect the electrical connection between the internal circuit of the socket itself and the mains supply, and the internal circuit is in a working state all the time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of special supply socket of charger mainly is the following three purpose of realization: 1. the socket which can disconnect the charger from the commercial power when the mobile equipment stops charging is provided, the power-on time of the internal devices of the charger is reduced, the service life of the charger is prolonged, and energy conservation, safety and environmental protection are realized; 2. on the premise of not changing the original use habit of a charger user, the commercial power can be conveniently connected into the charger when the mobile equipment is charged, and the power supply can be automatically disconnected from the charger when the charging is finished; 3. when the charger is disconnected from the mains supply, the internal circuit of the charger is also disconnected for power supply.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a charger-dedicated power outlet comprising: the device comprises a shell, a mains supply input interface, a mains supply output interface, a charging input line, a charging line, a power module, a detection control module, an execution module and a single chip microcomputer.

The charging input line comprises a VBUS line, a GND line, a CC line and a USB connector, the USB connector end is used for being connected with a charging output port of the charger, the other end of the USB connector end is electrically connected with the power supply module and the detection control module, and the charging input line is used for leading charging current and charging signals output by the charger to the power supply module and the detection control module.

The charging wire comprises a VBUS wire, a GND wire, a CC wire, an OTG trigger unit and a TYPE-C connector, the TYPE-C connector end is used for being connected with a charging port of the mobile device, the other end of the TYPE-C connector end is electrically connected with the detection control module and the charging input wire, two ends of the OTG trigger unit are respectively electrically connected with the CC wire and the GND wire of the charging wire after the OTG trigger unit is connected with a 5.1K omega resistor in series, the OTG trigger unit has the effects that after the charging wire is connected to the mobile device, the OTG mode of the mobile device serving as a power source is started through closing the first touch switch K1, the VBUS wire of the charging wire is used as the power source, and the GND wire provides initial working electric energy for circuits in the socket, the first touch switch K1 is better arranged on the TYPE-C connector, the beneficial effect is that the socket circuit can be conveniently started through the mode of providing the initial working electric energy for the circuits in the socket on the mobile device side far away from the charger, so that the mains supply is connected to the charger, and the charger is connected to the mains supply, and the charger, when the mains supply interface is located at a position inconvenient to be plugged in, the position, the user is greatly convenient to be plugged in.

The initial working current provided by the mobile device for the socket and the charging current provided by the charger for the mobile device share the VBUS line and the GND line in the charging line, and the beneficial effect is that the manufacturing cost is not increased through multiplexing of the cable.

The power supply module comprises a DC-DC unit and an energy storage unit, the input end of the power supply module is connected with a charging input line, a VBUS line and a GND line of a charging line, and the output end of the power supply module is connected with the single chip microcomputer, the detection control module and the execution module; the power storage element in the energy storage unit is a super capacitor or a battery, and the energy storage unit has the beneficial effect that when the output of the charger stops, for example, when the output of the charger stops due to the communication interruption of the charger and the mobile device, the energy storage unit can supply power to the singlechip, the detection control module and the execution module in a short time so as to maintain the normal work of the system.

The detection control module is also connected with the singlechip and comprises a first reset switch unit, a second reset switch unit, a current detection unit and an output control unit; the two poles of the controlled end of the first reset switch unit are connected to the CC line in series, the main control end is electrically connected with the single chip microcomputer, the first reset switch unit is controlled to be conducted when the single chip microcomputer is powered on, and the single chip microcomputer controls the first reset unit to be disconnected and then conducted again after the charger starts to charge the mobile equipment, so that the charger and the mobile equipment can be used for handshaking again to match charging current and charging voltage; the two poles of the earth of the controlled end of the second reset switch unit are respectively electrically connected with the CC line and the GND line, the main control end is electrically connected with the single chip microcomputer, the single chip microcomputer controls the second reset switch unit to be connected and then disconnected after the mobile device starts to charge, so that the charger and the mobile device can be used for shaking hands again to match with the charging current and the charging voltage, the switch device of the reset switch unit can be an optical coupler, a triode, an MOS (metal oxide semiconductor) tube or a relay, and the first reset switch unit and the second reset switch unit are arranged.

The relay unit is controlled by the single chip microcomputer to release and then attract again after the mobile equipment starts to be charged, the action of manually plugging and unplugging the charger is simulated, and the relay unit has the function of enabling the charger and the mobile equipment to reestablish charging connection so as to charge the charger and the mobile equipment with the optimal charging current and charging voltage which are matched again.

One end of the current detection unit is electrically connected with the VBUS wire or the GND wire, and the other end of the current detection unit is electrically connected with the single chip microcomputer; the singlechip can monitor the current on the VBUS line or the GND line of the charging line at any time through the current detection unit, compares the current value with a preset threshold value, and controls the execution module to disconnect the electric connection between the commercial power input interface and the commercial power output interface when the preset value is reached.

In some embodiments, the detection control module further comprises an output control unit, a controlled end of the output control unit is connected in series to a GND line or a VBUS line of a charging line, the main control end is connected to the single chip microcomputer and is used for controlling the output of the charging current, and the detection control module has the beneficial effect that when the multi-port charger is connected, the output of each charging port can be independently controlled.

The controlled end of the execution module is respectively electrically connected with the commercial power input interface and the commercial power output interface, the main control end is electrically connected with the single chip microcomputer, and the switching device in the execution module adopts a relay to control the on-off of the commercial power in a physical mode, so that the commercial power connection can be thoroughly disconnected; the execution module further comprises a second touch switch K2, two ends of the second touch switch K2 are electrically connected between the commercial power input interface and the commercial power output interface respectively, and the execution module has the beneficial effects that when the mobile equipment cannot provide OTG power supply, the commercial power is connected into the charger as a standby mode, so that the internal circuit of the socket starts working, and application scenes are increased.

The utility model discloses technical scheme beneficial effect is: utilize the mobile device to provide initial work electric energy for the socket, just can start socket circuit through pressing the switch that sets up on the charging wire, thereby insert the commercial power with the charger and charge for the mobile device, and simultaneously, the charger also supplies power for socket circuit, socket real-time detection mobile device charging current in charging process, disconnection charger and commercial power connection when satisfying predetermined threshold value, this scheme makes supply socket possess the function of timely automatic disconnection charger and commercial power connection, the inconvenience of still having the manual charger of pulling out after having avoided charging, the complete outage of self circuit has also been realized when disconnection charger and commercial power connection, user's experience has been improved, accomplish to be full of and to break promptly, thoroughly cut off the power supply, the charger life has been prolonged, and is more energy-saving and environment-friendly.

Drawings

Fig. 1 is a structure diagram of a charger-dedicated power outlet.

Fig. 2 is a diagram of a charger-dedicated power outlet connected to a mobile device and a charger according to one embodiment.

Fig. 3 is a circuit diagram of one embodiment of a charger-dedicated power outlet.

Fig. 4 is a flowchart of the operation of one embodiment of the power socket dedicated to the charger.

Detailed Description

The invention is further described with reference to the following figures and examples.

Fig. 2 is a diagram of one embodiment of a power socket dedicated for a charger, a mobile device and the charger, which are connected according to the diagram and connected to a commercial power to complete a preparation for charging the mobile device.

Fig. 3 is a circuit diagram of one embodiment of a power socket dedicated to a charger.

The utility power input port 20 is a two-pin plug for connecting with the utility power, the utility power output port 21 is a 2-hole jack for connecting with the charger plug, and an execution module 70 is further arranged between the utility power input port 20 and the utility power output port 21 for controlling the electric connection between the utility power input port and the utility power output port.

The input line 30 is a charging input line, and includes a D + line, a D-line, a VBUS line, a GND line, a CC line, and a TYPE-C terminal 31, a TYPE-C terminal 31 for connecting a charging output port of the charger, and the other end is connected to the power module 50, the detection control module 60, and the charging line 40 in the housing 10, and is used for connecting the current and the signal output by the charger to the circuit in the housing 10.

70 is the execution module, including relay unit 71 and second trigger switch K2, wherein relay unit 71 comprises relay J1, diode D3, resistance R9 and triode Q2, relay coil both ends parallelly connected have diode D3, a termination power module 50 output positive pole, another termination triode Q2 collecting electrode, triode Q2 projecting pole power module 50 output negative pole, the base passes through resistance R9 and is connected with singlechip U1's PA5, this embodiment relay J1 is single-pole single-throw normally open relay. And a light touch switch K2 is also bridged on the movable contact and the fixed contact of the relay and is used for manually controlling the commercial power to be connected into a commercial power output port 21 from a commercial power input port 20.

40 is a charging wire, including D + line, D-line, VBUS line, GND line, CC line, OTG trigger unit 41 and TYPE-C terminal 42, TYPE-C terminal 42 is used to connect the mobile device charging port, trigger unit 41 is formed by connecting resistor R1 and first trigger switch K1 in series and is bridged between GND line and CC line, wherein the typical value of resistor R1 is 5.1K Ω and is set on TYPE-C terminal 42 to facilitate the user's operation.

The power module 50 is a power module, the input end of the power module is electrically connected with a VBUS wire and a GND wire of the charging input line 30, the power module comprises a DC-DC unit 51 and an energy storage unit 52, the DC-DC unit 51 is a wide input voltage direct current conversion circuit, and the power module belongs to the prior art and is used for converting charging voltage from mobile equipment or a charger into 4V direct current applicable to the detection control module 60, the execution module 70 and the single chip microcomputer 80; the energy storage unit 52 is composed of a diode D2, a resistor R2 and a super capacitor C4, the anode of the super capacitor C4 is connected with the anode of the output end of the DC-DC unit 51 through the diode D2, the cathode of the super capacitor C4 is connected with the cathode of the output end of the DC-DC unit 51 through the current limiting resistor R2, and the energy storage unit 52 is used for maintaining the power supply of the socket circuit for a short time when the charger does not output.

Reference numeral 60 denotes a detection control block, which includes a first reset switch unit 61, a second reset switch unit 62, a current detection unit (63), and an output control unit (64).

The controlled end of opto-coupler U3 connects in series on the CC line in first reset switch unit 61, and the control end connects singlechip output PA6 after establishing ties with R3, and its reset process is that after singlechip 80 was gone up the electricity, through port PA6 drive opto-coupler U3 switch on for 15 seconds, then cut off 0.5 seconds, then continuously switch on, set up first reset switch 61 purpose and make charger and mobile device shake hands suitable charging current and charging voltage again through the mode of disconnection and the CC line of recanalization.

The controlled end of an optical coupler U4 in the second reset switch unit 62 is connected between a CC line and a GND line in a spanning mode, the control end is connected with a current-limiting resistor R4 in series and then connected with a PA0 of the single chip microcomputer 80, after the first reset switch unit 61 finishes resetting, the single chip microcomputer 80 drives the optical coupler U4 to be conducted for 0.2 second through a port PA0 and then is continuously cut off, the purpose of the process is to force the charger to be in charge interruption communication with the mobile equipment in a mode of short-circuiting the CC line and the GND line, and then the optimal charging current and charging voltage are held again after the charging interruption; the two-stage reset circuit of the first and second reset circuits is provided in the embodiment, and the purpose of the two-stage reset circuit is to enable the charger to re-handshake with the mobile device, and one of the two-stage reset circuit can be adopted in a normal case.

The output control unit 64 is composed of a switch transistor Q1, a resistor R7 and a resistor R8, wherein the drain of the switch transistor Q1 is connected to the GND line of the charging line 40, the source is connected to the GND line of the charging input line 30 through R5, the gate is connected to the PA2 of the single chip 80 through the resistor R8, and the single chip 80 is powered on, i.e., Q1 is controlled to be turned on, so as to establish a loop for the charging current to be sent to the mobile device.

The detection unit 63 is composed of resistors R5 and R6 and a capacitor C5, the R5 is a 50m Ω sampling resistor connected in series to the GND line, after the first and second reset units are reset, the single chip 80 collects a current value Ia flowing through the charging output line in real time, when the current value Ia is smaller than a predetermined current value I, the single chip 80 controls Q1 in the output control unit 64 to be cut off to disconnect the charging output current, and then controls the relay unit J1 to cut off the electrical connection between the mains supply input interface 20 and the mains supply input interface 21 to cut off the connection between the charger and the mains supply, and the predetermined current value I is preferably 50ma.

80 is a singlechip, and a VDD pin is connected with the positive pole of the output end of the power supply module (50); the VSS pin is connected with the negative electrode of the power supply module (50); the pin PA0 is connected with a second reset switch 62; the PA1 pin is an AD conversion interface and is connected with the detection unit 63; the pin PA2 is connected to the output control unit 64, the pin PA5 is connected to the relay unit 71, and the pin PA6 is connected to the first reset switch unit 61.

The following describes the work flow of the charger dedicated power outlet according to this embodiment with reference to fig. 2 and 4:

when the mobile device, the charger and the socket of the embodiment are connected as shown in fig. 2, the socket is connected to the commercial power, wherein one method for starting the socket circuit is as follows: when the mobile device has an OTG power supply function and is in a starting-up state, the mobile device starts OTG power supply and provides an initial working power supply for the socket through a charging wire by pressing a first touch switch K1; another method of activating the socket is: when the mobile device fails to provide the initial working power supply for the socket, such as: when the mobile device does not have the OTG power supply function or the device with the OTG power supply function can not provide the initial working power supply, the commercial power is connected into the charger by pressing the second touch switch K2 as a supplementary means, and the charger converts the commercial power into low-voltage direct current and sends the low-voltage direct current to the socket through the charging input line to serve as the initial working power supply of the socket.

When the socket circuit starts to work, the single chip microcomputer 80 controls the relay J1 to be closed, and the charger continuously supplies power to the socket circuit; then the single chip 80 controls the output control unit Q1 to be conducted, and the mobile device starts to be charged.

When the mobile device starts to be charged, the single chip 80 controls the first and second reset units to sequentially reset the protocol connection between the mobile device and the charger, and the first and second reset units are re-handshake to charge the mobile device with the optimum voltage and current.

In the charging process of the mobile equipment, the single chip microcomputer 80 continuously monitors the charging current Ia through the detection unit 63, when the current Ia is smaller than the preset value I, the single chip microcomputer 80 sequentially controls the charging output unit Q1 to be cut off and the relay J1 to be released, so that not only is the charging loop between the charger and the mobile equipment disconnected, but also the connection between the charger and the mains supply is disconnected, and meanwhile, the socket realizes the power failure.

The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereby; any replacement and improvement made on the basis of not violating the conception of the utility model belong to the protection scope of the utility model.

Claims (10)

1. A charger-dedicated power outlet comprising: the device comprises a shell (10), a mains supply input interface (20) and a mains supply output interface (21), and is characterized by further comprising a charging input line (30), a charging line (40), a power module (50), a detection control module (60), an execution module (70) and a single chip microcomputer (80);

the charging input line (30) comprises a VBUS line, a GND line, a CC line and a USB connector (31), one end of the charging input line is used for being connected with a power outlet of the charger, the other end of the charging input line is connected with the power module (50) and the detection control module (60), and the charging input line is used for leading charging current and charging signals output by the charger to the power module (50) and the detection control module (60);

the charging line (40) comprises a VBUS line, a GND line, a CC line, an OTG trigger unit (41) and a TYPE-C connector (42), wherein the end of the TYPE-C connector (42) is used for being connected with a charging port of the mobile equipment, the other end of the TYPE-C connector (42) is electrically connected with the detection control module (60) and the charging input line (30), the OTG trigger unit (41) is electrically connected with the CC line and the GND line of the charging line (40) respectively through two ends of a first touch switch (K1) and a resistor (R1) which are connected in series, the resistor (R1) accords with the definition of TYPE-C specification, the resistance value of the resistor is 5.1K omega, and the OTG trigger unit has the function that after the charging line (40) is connected to the mobile equipment, the OTG mode of the mobile equipment is started through closing the first touch switch (K1) to serve as a power supply, and initial working electric energy is provided for circuits in the socket through the VBUS line and the GND line of the charging line (40);

the power supply module (50) comprises a DC-DC unit (51) and an energy storage unit (52), the input end of the power supply module is electrically connected with a VBUS wire and a GND wire in the charging input line (30), and the output end of the power supply module is electrically connected with the detection control module (60), the execution module (70) and the single chip microcomputer (80);

the detection control module (60) is also electrically connected with the singlechip (80) and comprises a first reset switch unit (61), a second reset switch unit (62), a current detection unit (63) and an output control unit (64); two poles of a controlled end of the first reset switch unit (61) are connected in series on a CC line, and a main control end is electrically connected with the singlechip (80); two poles of a controlled end of the second reset switch unit (62) are electrically connected with the CC line and the GND line, and a main control end is electrically connected with the singlechip (80); one end of the current detection unit (63) is connected with the VBUS wire or the GND wire, and the other end of the current detection unit is connected with the single chip microcomputer (80); the controlled end of the output control unit (64) is connected in series with the VBUS line or the GND line of the charging wire (40), and the main control end is electrically connected with the singlechip (80);

the execution module (70) comprises a relay unit (71) and a second touch switch (K2), a switch device for controlling the on-off of the commercial power by the relay unit (71) is a relay, a movable contact and a fixed contact of the relay are respectively and electrically connected with the commercial power input interface (20) and the commercial power output interface (21), and a main control end is connected with the single chip microcomputer (80); two ends of the second touch switch (K2) are respectively connected with the commercial power input interface (20) and the commercial power output interface (21).

2. A charger-dedicated power socket as claimed in claim 1, characterized in that the VBUS line and the GND line in the charging line (40) are shared by the initial operating current supplied by the mobile device to the socket and the charging current supplied by the charger to the mobile device.

3. The power socket special for the charger according to claim 1, wherein the single chip (80) is powered on, i.e. the relay unit (71) is controlled to be closed, so that the commercial power is connected to the charger through the relay unit (71); the power supply of the socket circuit is provided by the mobile device when starting, the power supply for maintaining is provided by the charger, and the power storage unit (52) is provided when the output of the charger is stopped due to the communication interruption between the charger and the mobile device.

4. The special power socket for the charger according to claim 1, wherein the power storage element in the energy storage unit (52) is a super capacitor or a battery, and the purpose of the power storage element is to supply power to the detection control module (60), the execution module (70) and the single chip microcomputer (80) when the charger has no output.

5. The power socket special for the charger according to claim 1, wherein the single chip microcomputer (80) is powered on to control the first reset switch unit (61) to be turned on, after the charger starts to charge the mobile device, the single chip microcomputer (80) controls the first reset switch unit (61) to be turned off and then turned on again, so that the charger and the mobile device perform handshake again to match the charging current and the charging voltage, and the switch device of the first reset switch unit (61) is an optical coupler, a triode, a MOS transistor or a relay.

6. The power socket special for the charger according to claim 1, wherein after the charger starts to charge the mobile device, the single chip microcomputer (80) controls the second reset switch unit (62) to be turned on and then turned off, so that the charger and the mobile device can be re-handshake to match the charging current and the charging voltage, and the switch device of the second reset switch unit (62) is an optical coupler, a triode, a MOS transistor or a relay.

7. The power socket dedicated to the charger according to claim 1, wherein the detecting unit (63) is configured to detect a charging current on the VBUS line or the GND line, compare a measured current value with a predetermined threshold value after the AD conversion by the single chip microcomputer (80), and when the predetermined value is reached, the single chip microcomputer (80) controls the relay unit (71) to disconnect the electrical connection between the commercial power input interface (20) and the commercial power output interface (21).

8. The power socket dedicated to the charger according to claim 1, wherein the output control unit (64) is controlled to be turned on when the single chip microcomputer (80) is powered on, and the charging current output is cut off when the current threshold value detected by the detection unit (63) reaches a predetermined value.

9. A charger-dedicated power outlet according to claim 1, characterized in that the relay unit (71) is released and then re-engaged after the mobile device has started charging, and functions to re-establish the charging connection between the charger and the mobile device for re-matching the optimum charging current and charging voltage.

10. The power socket dedicated to the charger according to claim 1, wherein the second touch switch (K2) is used to temporarily connect the charger with the commercial power by closing the second touch switch (K2) when the mobile device cannot provide the initial power supply for the socket.

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