WO2019042254A1 - Electric leakage resistance circuit, two-pin charger, electric leakage resistance charging method, and computer readable storage medium - Google Patents

Electric leakage resistance circuit, two-pin charger, electric leakage resistance charging method, and computer readable storage medium Download PDF

Info

Publication number
WO2019042254A1
WO2019042254A1 PCT/CN2018/102521 CN2018102521W WO2019042254A1 WO 2019042254 A1 WO2019042254 A1 WO 2019042254A1 CN 2018102521 W CN2018102521 W CN 2018102521W WO 2019042254 A1 WO2019042254 A1 WO 2019042254A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
charger
voltage
branch
legged
Prior art date
Application number
PCT/CN2018/102521
Other languages
French (fr)
Chinese (zh)
Inventor
龙玉其
侯方西
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2019042254A1 publication Critical patent/WO2019042254A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present disclosure relates to, but is not limited to, the field of charging technology, and more particularly to a leakage prevention circuit, a two-legged charger, a leakage prevention charging method, and a computer readable storage medium.
  • rechargeable electrical appliances including mobile terminals such as mobile phones
  • metal shells are becoming more and more popular, charging a rechargeable electrical appliance with a metal shell using a conventional two-legged charger. There may be risks.
  • the conventional two-legged charger does not have a protective earth (PE)
  • PE protective earth
  • Embodiments of the present disclosure provide a leakage prevention circuit configured to be disposed between two pins of a two-leg charger and a charging circuit, the leakage prevention circuit including a first branch circuit and a second branch circuit.
  • the first branch circuit includes a first power input terminal sequentially connected in series, a voltage detecting circuit, and a first contact end, and the first power input terminal is configured to be connected to a first pin of the two-legged charger,
  • the first contact end is configured to be coupled to a metal portion of the outer casing of the two-legged charger, the voltage detecting circuit is configured to detect a voltage on the first branch circuit, and the second branch circuit includes a second power source An input end and a switching circuit, the second power input end is configured to be connected to a second pin of the two-leg charger, and the switching circuit is configured to be grounded to an output of the charging circuit of the two-leg charger
  • the switching circuit is configured to connect the second power input terminal of the first branch circuit or the second branch circuit to the two-leg charger according
  • Embodiments of the present disclosure also provide a two-legged charger including a leakage preventing circuit, a charging circuit, and two pins, the leakage preventing circuit being disposed between the two pins and the charging circuit
  • the leakage prevention circuit includes a first branch circuit and a second branch circuit
  • the first branch circuit includes a first power input terminal, a voltage detecting circuit, and a first contact end, which are sequentially connected in series, the first power input The end is configured to be coupled to the first pin of the two-leg charger, the first contact end is configured to be coupled to the metal portion of the housing of the two-leg charger, and the voltage detecting circuit is configured to detect the first branch a voltage on the circuit
  • the second branch circuit includes a second power input and a switching circuit
  • the second power input is configured to be coupled to a second pin of the two-leg charger
  • the switching circuit Configuring to be connected to an output ground of the charging circuit of the two-legged charger
  • the switching circuit is configured to cause the first branch circuit or the second branch
  • An embodiment of the present disclosure further provides a leakage preventing charging method, comprising: providing a leakage preventing circuit between a first pin and a second pin of a two-pin charger and a charging circuit; The voltage on the first branch circuit of the leakage preventing circuit is detected in a state in which the rechargeable electrical device is charged; and the first pin or the second pin of the two-leg charger is controlled according to the detected voltage The output of the charging circuit connected to the two-legged charger is grounded.
  • Embodiments of the present disclosure also provide a computer readable storage medium having stored therein computer executable instructions that are executed to implement a leakage prevention charging method of an embodiment of the present disclosure .
  • FIG. 1 is a schematic diagram of a charging circuit of a two-legged charger
  • FIG. 2 is a structural block diagram of a leakage preventing circuit according to an embodiment of the present disclosure
  • FIG. 3 is a circuit diagram of a leakage preventing circuit of an embodiment of the present disclosure.
  • FIG. 4 is a structural block diagram of a two-legged charger according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a two-legged charger of an embodiment of the present disclosure.
  • FIG. 6 is a structural block diagram of a charging circuit in a two-legged charger of an embodiment of the present disclosure
  • FIG. 7 is a flow chart of a leakage prevention charging method according to an embodiment of the present disclosure.
  • FIG. 1 shows a schematic diagram of a charging circuit for a two-legged charger.
  • a low frequency (for example, 50 Hz) 220V AC signal is input from the left end, rectified to a 198V DC signal, and then converted into a DC signal by, for example, a field effect transistor (corresponding to a switch).
  • the high-frequency (for example, 60KHz) AC signal is then transformed by a transformer to output an AC signal with a peak-to-peak value of 15V, and the AC signal is rectified into a 12V, 9V, or 5V DC signal, which is output from the right end.
  • the capacitor CY1 is grounded as an alternating current (high frequency), which can prevent high-frequency interference in the circuit on the right side thereof, and does not connect the working ground of the charging circuit to the output ground. It has high withstand voltage and small capacitance.
  • the two-legged charger does not have a protective ground (PE), when the two-legged charger is used to charge a rechargeable electrical device having a metal casing, an induced voltage is present on the metal casing of the rechargeable electrical device.
  • PE protective ground
  • the capacitance of the capacitor CY1 in the charging circuit of the two-legged charger is 1 nF
  • the rechargeable electric appliance is measured.
  • the alternating current causes a slight tingling feeling to the human body. If the two-legged charger leaks during use, the leakage voltage directly causes harm to the human body.
  • FIG. 2 is a block diagram showing the structure of a leakage preventing circuit of an embodiment of the present disclosure.
  • the leakage preventing circuit can be disposed between the two pins of the two-legged charger and the charging circuit.
  • the leakage prevention circuit includes a first branch circuit 11 and a second branch circuit 12.
  • the first branch circuit 11 includes a first power input terminal 111, a voltage detecting circuit 112 and a first contact end 113 connected in series in series, and the first power input terminal 111 is connected to the first pin of the two-leg charger, the first contact
  • the terminal 113 is connected to the housing of the two-leg charger, specifically to the ground terminal on the housing of the two-leg charger.
  • the second branch circuit 12 includes a second power input terminal 121 and a switching circuit 122.
  • the second power input terminal 121 is connected to the second pin of the two-leg charger, and the output of the switching circuit 122 and the charging circuit of the two-leg charger is grounded. connection.
  • the output ground of the charging circuit of the two-legged charger is connected to the metal casing of the rechargeable electrical device being charged.
  • the outer casing of the two-legged charger is arranged to include a metal portion, the first contact end 113 is connected to the metal portion, or the metal portion is directly used as the first contact end 113.
  • the user's hand contacts the metal portion of the outer casing of the two-legged charger, and the first contact end 113 is connected to the earth through the human body, thereby the first branch circuit 11 forms a loop.
  • the voltage detecting circuit 112 is configured to detect a voltage on the first branch circuit 11, and the switching circuit 122 is configured to control an operating state of the second branch circuit 12 according to a voltage detected by the voltage detecting circuit 112. Thereby, the output ground of the charging circuit controlling the two-legged charger is connected to the second branch input terminal 11 of the first branch circuit 11 or the second branch circuit 12 via the switching circuit 122.
  • the voltage detecting circuit 112 detects whether or not there is an effective voltage on the first branch circuit 11. If there is an effective voltage on the first branch circuit 11, that is, the voltage is substantially zero, the first power input terminal 111 of the first branch circuit 11 is connected to the live line in the power socket, and the second branch circuit 12 is The second power input terminal 121 is connected to the neutral line in the power outlet. If there is no effective voltage on the first branch circuit 11, that is, the voltage is substantially zero, the first power input terminal 111 of the first branch circuit 11 is connected to the neutral line in the power socket, and the second branch circuit 12 is connected. The second power input terminal 121 is connected to the live wire in the power socket.
  • the switching circuit 122 will cause the second power input 121 of the second branch circuit 12 to be connected to the output ground of the charging circuit of the two-leg charger via the switching circuit 122.
  • the first power input terminal 111 of the first branch circuit 11 is connected to the neutral line in the power socket, and the second power input of the second branch circuit 12 is
  • the terminal 121 is connected to the live line in the power outlet, and the switching circuit 122 will cause the first branch circuit 11 to be grounded via the switching circuit 122 to the output of the charging circuit of the two-legged charger.
  • the leakage preventing circuit of the embodiment of the present disclosure between the two pins of the two-legged charger and the charging circuit, the rechargeable electric device having the metal casing is charged using the two-legged charger.
  • the neutral line in the power socket is connected to the output ground of the charging circuit of the two-legged charger, the metal casing of the rechargeable electrical device is connected with the neutral wire in the power socket, thereby avoiding leakage and avoiding the occurrence of leakage.
  • the second branch circuit 12 further includes a first fuse 123 that is connected in series between the switching circuit 122 and the output ground of the charging circuit of the two-legged charger.
  • the switching circuit 122 includes a field effect transistor. Controlling, by the voltage detecting circuit 112, that the voltage on the first branch circuit 11 is substantially not zero, controlling the second power input terminal of the field effect transistor connected to the second branch circuit 12
  • the PN junction of 121 is turned on, such that the second power input terminal 121 of the second branch circuit 12 is connected to the output of the charging circuit of the two-leg charger, and the connection of the field effect transistor to the first branch is controlled.
  • the PN junction of the circuit 11 is turned off, causing the first branch circuit 11 to be disconnected from the output of the charging circuit of the two-legged charger.
  • the voltage detecting circuit 112 detects that the voltage on the first branch circuit 11 is substantially zero, controlling the PN junction of the field effect transistor connected to the first branch circuit 11 to be turned on, so that the The first branch circuit 11 is turned on with the output of the charging circuit of the two-legged charger, and controls the PN junction of the field effect transistor connected to the second power input terminal 121 of the second branch circuit 12 to be turned off.
  • the first power input terminal 121 of the second branch circuit 12 is disconnected from the output ground of the charging circuit of the two-legged charger.
  • the turn-on or turn-off of the field effect transistor can be controlled by controlling a signal input to the control terminal of the field effect transistor.
  • a signal of a voltage on the first branch circuit 11 detected by the voltage detecting circuit 112 may be input to a control terminal of the field effect transistor to control turn-on or turn-off of a PN junction of the field effect transistor. .
  • the switching circuit 122 may include two or more switching transistors, for example, including a switching transistor connected between the first branch circuit 11 and the output ground of the charging circuit of the two-leg charger.
  • a switching transistor is connected between the second power input terminal 121 of the second branch circuit 12 and the output ground of the charging circuit of the two-legged charger.
  • a signal of a voltage on the first branch circuit 11 detected by the voltage detecting circuit 112 and a reverse signal thereof may be input to control ends of the two switching transistors, respectively, to control the plurality of switching transistors. Turn on or off.
  • the switching circuit 122 can also be a relay, the normally closed contact on the relay can be connected to the first branch circuit 11, the normally open contact on the relay and the second branch circuit 12
  • the second power input terminal 121 is connected.
  • the voltage detecting circuit 112 detects that there is an effective voltage on the first branch circuit 11, that is, the voltage is substantially zero, the relay will open the normally closed contact and close normally.
  • the contacts are such that the second power input 121 of the second branch is connected to the output of the charging circuit of the two-leg charger.
  • the voltage detecting circuit 112 includes at least two voltage dividing resistors, which are sequentially connected in series at the first power input end 111 and the first contact end 113 of the first branch circuit 11 between.
  • the voltage detecting circuit 112 detects whether or not there is an effective voltage on the first branch 11 by detecting whether there is an effective voltage drop across the voltage dividing resistor.
  • the at least two voltage dividing resistors are connected in series or in parallel.
  • the voltage detection circuit 112 can include a combination of series resistance and parallel resistance, as desired.
  • the voltage detecting circuit detects a voltage on the first branch circuit, and the switching circuit controls an operating state of the second branch circuit according to the voltage, thereby controlling two feet.
  • the output ground of the charging circuit of the charger is connected to the second power input of the first branch circuit or the second branch circuit through the switching circuit.
  • the leakage preventing circuit of the embodiment of the present disclosure According to the voltage on the first branch circuit detected by the voltage detecting circuit, the first pin and the second pin connected to the two-pin charger can be identified respectively Is the hot wire or the neutral wire, when the two-legged charger is inserted into the power socket, the leakage preventing circuit can recognize whether the first pin or the second pin of the two-pin charger is connected to the live wire, and The output ground of the charging circuit of the two-legged charger is connected with the neutral line, thereby connecting the metal casing of the rechargeable electrical device being charged with the neutral wire, thereby avoiding the occurrence of leakage and avoiding being charged.
  • the high induction voltage on the metal casing of the charging electrical equipment eliminates the safety hazard and improves the safety of the user using the two-legged charger.
  • FIG. 3 shows a circuit diagram of a leakage preventing circuit of an embodiment of the present disclosure.
  • the leakage prevention circuit includes a first branch circuit and a second branch circuit.
  • the first branch circuit includes a first power input terminal 111 connected by a series connection, a first voltage dividing resistor R1, a second voltage dividing resistor R2, and a first contact end 113, the first power input end 111 is coupled to the first pin of the two-legged charger, the first contact end 113 being coupled to the metal portion of the housing of the two-legged charger.
  • the second branch circuit includes a second power input terminal 121 and a switching transistor M1, and the second power input terminal 121 is connected to the second pin of the two-leg charger, and the charging circuit of the open transistor M1 and the two-leg charger Output ground connection.
  • the output ground of the charging circuit of the two-legged charger is connected to the metal casing of the rechargeable electrical device being charged.
  • the metal portion on the outer casing of the two-legged charger can directly function as the first contact end 113.
  • the user's hand contacts the metal portion on the outer casing of the two-leg charger, and the first contact end 113 is connected to the earth through the human body, thereby the first branch
  • the circuit forms a loop.
  • the user inserts the two-legged charger into a power outlet to charge a rechargeable electrical device having a metal outer casing, and the metal portion of the user's hand and the outer casing of the two-legged charger
  • a rechargeable electrical device having a metal outer casing
  • the metal portion of the user's hand and the outer casing of the two-legged charger When contact occurs, if there is an effective voltage drop detected on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, it indicates that the first power input terminal 111 of the first branch circuit is connected to the live line in the power socket, and the second branch The second power input terminal 121 of the circuit circuit is connected to the neutral line in the power socket. If there is no effective voltage drop detected on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, the first branch circuit and the power source are indicated. A neutral connection in the socket, the second power input 121 of the second branch circuit is connected to the live line in the power outlet.
  • the switching transistor M1 When it is detected that there is an effective voltage drop on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, that is, the voltage drop is substantially zero, by controlling the input of the control terminal of the switching transistor M1, the switching transistor M1 is connected to the first The PN junction of the second power input terminal 121 of the two-branch circuit is turned on, the second power input terminal 121 of the second branch circuit is connected to the output of the charging circuit of the two-leg charger, and the connection of the switching transistor M1 is made. The PN junction to the first branch circuit is turned off, and the output of the first branch circuit is disconnected from the output of the charging circuit of the two-leg charger.
  • the connection of the switching transistor M1 is made to The PN junction of one of the circuit circuits is turned on, the first branch circuit is connected to the output of the charging circuit of the two-leg charger, and the connection of the switching transistor M1 to the second power input terminal 121 of the second branch circuit is The PN junction is turned off, and the second power input terminal 121 of the second branch circuit is disconnected from the output ground of the charging circuit of the two-leg charger.
  • the leakage preventing circuit of the embodiment of the present disclosure between the two pins of the two-legged charger and the charging circuit, the rechargeable electric device having the metal casing is charged using the two-legged charger.
  • the neutral line in the power socket is connected to the output ground of the charging circuit of the two-legged charger, the metal casing of the rechargeable electrical device is connected with the neutral wire in the power socket, thereby avoiding leakage and avoiding the occurrence of leakage.
  • the second branch circuit further includes a first fuse 123 connected in series between the switching transistor M1 and an output ground of a charging circuit of a two-legged charger.
  • the control terminal of the switching transistor M1 is connected between the first voltage dividing resistor R1 and the second voltage dividing resistor R2, and the user inputs the two-pin charger into the power socket at the moment when the user inserts the two-pin charger into the power socket.
  • the hand is in contact with the metal portion of the outer casing of the two-legged charger, the first branch circuit forms a loop, and a voltage drop exists on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, and the first voltage dividing resistor R1
  • the difference between the voltage drop across and the voltage drop across the second voltage dividing resistor R2 is applied to the control terminal of the switching transistor M1 to control the turn-on or turn-off of the PN junction of the switching transistor M1.
  • the switching transistor M1 can be replaced by a relay.
  • the relay When the effective voltage is present on the first branch circuit, the relay causes the second power input terminal 121 of the second branch circuit and the charging circuit of the two-leg charger. The output is grounded. When there is no effective voltage on the first branch circuit, the relay connects the first branch circuit to the output of the charging circuit of the two-pin charger.
  • the charger includes a leakage preventing circuit 41, a charging circuit 42, a first pin 43 and a second pin 44.
  • the leakage preventing circuit 41 is disposed between the charging circuit 42 and the first pin 43 and the second pin 44, and the leakage preventing circuit 41 includes a first branch circuit and a second branch circuit.
  • the first branch circuit is electrically connected to the first pin 43 and the second branch circuit is electrically connected to the second pin 44.
  • the first branch circuit includes a first power input terminal 111, a voltage detecting circuit 112, and a first contact end 113 connected in series, and the first power input terminal 111 is connected to the first pin of the two-leg charger.
  • the first contact end 113 is connected to the metal portion of the outer casing of the two-legged charger.
  • the second branch circuit includes a second power input terminal 121 and a switching circuit 122.
  • the second power input terminal 121 is connected to the second pin of the two-pin charger, and the switching circuit 122 is connected to the output of the charging circuit of the two-leg charger. .
  • FIG. 6 is a block diagram showing the structure of a charging circuit in a two-legged charger of an embodiment of the present disclosure.
  • the charging circuit 42 includes a rectifier module 422, a transformer 423, a voltage stabilization module 424, and a safety capacitor 425.
  • the charging circuit 42 is, for example, the charging circuit shown in FIG.
  • the neutral wire in the power socket is grounded to the output of the charging circuit of the two-legged charger, thereby enabling the rechargeable electrical appliance
  • the metal casing of the equipment is connected to the neutral wire in the power socket to avoid leakage, and the high induction voltage on the metal casing of the rechargeable electrical equipment is avoided, thereby eliminating safety hazards.
  • the charging circuit 42 may further be provided with a second fuse 421 configured to ensure the two When the foot charger is plugged into a power outlet, it may be safe in case of a large current causing leakage.
  • the second fuse 421 can be connected in series between the safety capacitor 425 of the charging circuit 42 and the output ground of the two-legged charger.
  • the second fuse 421 can be connected between the capacitor CY1 of the charging circuit and the output ground of the charging circuit.
  • FIG. 5 shows a schematic diagram of a two-legged charger of an embodiment of the present disclosure.
  • the two-legged charger of the embodiment of the present disclosure is provided with a leakage preventing circuit for detecting the voltage on the first branch circuit of the leakage preventing circuit, and the switching circuit controls the output of the charging circuit of the two-legged charger according to the voltage. Connecting to the second power input terminal of the first branch circuit or the second branch circuit through the switching circuit, thereby connecting the metal casing of the rechargeable electrical device being charged with the neutral wire in the power socket, thereby avoiding The occurrence of leakage also avoids the presence of high induced voltage on the metal casing of the rechargeable electrical equipment being charged, eliminating safety hazards and improving the safety of the user using the two-legged charger.
  • FIG. 7 shows a flow chart of a leakage prevention charging method of an embodiment of the present disclosure.
  • the leakage prevention charging method includes steps S701 to S703.
  • a leakage preventing circuit is disposed between the two pins of the two-pin charger (ie, the first pin and the second pin) and the charging circuit, and the leakage preventing circuit is the leakage preventing circuit of the embodiment of the present disclosure.
  • the leakage prevention circuit includes a first branch circuit connected to the first pin of the two-leg charger, and a second branch circuit connected to the two-leg charger The second pin.
  • the first pin when the detected voltage is substantially not zero, the first pin is connected to the live wire in the power socket, and the second pin is connected to the neutral wire in the power socket when the detected voltage is substantially When it is zero, the first pin is connected to the neutral wire in the power socket, and the second pin is connected to the live wire in the power socket.
  • the second pin of the two-legged charger is connected to the output ground of the charging circuit of the two-legged charger.
  • the first pin of the two-legged charger is connected to the output ground of the charging circuit of the two-legged charger.
  • the output ground of the charging circuit of the two-legged charger is connected to the metal casing of the rechargeable electrical device being charged.
  • the anti-leakage charging method of the embodiment of the present disclosure controls the output ground of the charging circuit of the two-legged charger to be connected to the two-legged charger by setting a leakage preventing circuit and detecting a voltage on the first branch circuit of the leakage preventing circuit.
  • the first pin or the second pin thereby connecting the metal casing of the rechargeable electrical device being charged with the neutral wire in the power socket, avoiding the occurrence of leakage, and avoiding the rechargeable electric appliance being charged
  • the high induction voltage on the metal casing of the device eliminates safety hazards and improves the safety of the user using the two-legged charger.
  • modules or steps of the above-described embodiments of the present disclosure may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices. on.
  • the modules or the steps of the above embodiments of the present disclosure may also be implemented by program code executable by the computing device, so that they may be stored in a computer storage medium (ROM/RAM, disk, optical disk) by the computing device. Read and execute.
  • the steps shown or described in this disclosure may be performed in an order different than that shown in the present disclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Provided are an electric leakage resistance circuit, a two-pin charger, an electric leakage resistance charging method, and a computer readable storage medium. The electric leakage resistance circuit is disposed between two pins and a charging circuit of the two-pin charger, and comprises a first branch circuit and a second branch circuit. The first branch circuit comprises a first power supply input end, a voltage detection circuit and a first touch end that are serially connected. The first power supply input end is connected to a first pin of the two-pin charger, and the first touch end is connected to a metal part of a housing of the two-pin charger. The voltage detection circuit detects a voltage on the first branch circuit. The second branch circuit comprises a second power supply input end and a switching circuit. The second power supply input end is connected to a second pin of the two-pin charger. The switching circuit is connected to an output ground of the charging circuit, and allows the first branch circuit or a second power supply input end to be connected to an output ground of the charging circuit according to the voltage detected by the voltage detection circuit.

Description

防漏电电路、两脚充电器、防漏电充电方法及计算机可读存储介质Anti-leakage circuit, two-legged charger, anti-leakage charging method and computer readable storage medium
相关申请的交叉引用Cross-reference to related applications
本申请要求于2017年8月28日提交的题为“一种防漏电电路、充电器及防漏电充电方法”的中国专利申请No.201710749533.3的优先权，该中国专利申请的内容通过引用的方式全文合并于此。The present application claims priority to Chinese Patent Application No. 201710749533.3, entitled "A Leak-proof Circuit, Charger and Leak-proof Charging Method", filed on August 28, 2017, the content of which is incorporated by reference. The full text is incorporated here.
技术领域Technical field
本公开涉及但不限于充电技术领域，尤其涉及防漏电电路、两脚充电器、防漏电充电方法、及计算机可读存储介质。The present disclosure relates to, but is not limited to, the field of charging technology, and more particularly to a leakage prevention circuit, a two-legged charger, a leakage prevention charging method, and a computer readable storage medium.
背景技术Background technique
随着可充电电器设备(包括诸如手机的移动终端)的多样化，具有金属壳的可充电电器设备越来越普遍，在使用传统的两脚充电器对具有金属壳的可充电电器设备进行充电时，可能会有风险。With the diversification of rechargeable electrical appliances (including mobile terminals such as mobile phones), rechargeable electrical appliances with metal shells are becoming more and more popular, charging a rechargeable electrical appliance with a metal shell using a conventional two-legged charger. There may be risks.
由于传统的两脚充电器不带有保护接地(PE)，使用传统的两脚充电器对具有金属壳的可充电电器设备进行充电时，可充电电器设备的金属壳上会存在感应电压，另外，还可能发生漏电，因此，使用传统的两脚充电器对具有金属壳的可充电电器进行充电存在安全隐患，甚至会对人体产生伤害。Since the conventional two-legged charger does not have a protective earth (PE), when a conventional two-legged charger is used to charge a rechargeable electrical device having a metal case, an induced voltage is present on the metal case of the rechargeable electrical device, and There may also be leakage, so using a traditional two-legged charger to charge a rechargeable appliance with a metal case poses a safety hazard and may even cause harm to the human body.
公开内容Public content
本公开的实施例提供一种防漏电电路，配置为设置在两脚充电器的两个引脚与充电电路之间，所述防漏电电路包括第一支路电路和第二支路电路，所述第一支路电路包括依次串联连接的第一电源输入端、电压检测电路、以及第一接触端，所述第一电源输入端配置为与两脚充电器的第一引脚连接，所述第一接触端配置为与所述两脚充电器的外壳的金属部分连接，所述电压检测电路配置为检测所述第一支 路电路上的电压，所述第二支路电路包括第二电源输入端和切换电路，所述第二电源输入端配置为与所述两脚充电器的第二引脚连接，所述切换电路配置为与所述两脚充电器的充电电路的输出接地连接，且所述切换电路配置为根据所述电压检测电路检测到的电压，使得所述第一支路电路或者所述第二支路电路的所述第二电源输入端连接至所述两脚充电器的充电电路的输出接地。Embodiments of the present disclosure provide a leakage prevention circuit configured to be disposed between two pins of a two-leg charger and a charging circuit, the leakage prevention circuit including a first branch circuit and a second branch circuit. The first branch circuit includes a first power input terminal sequentially connected in series, a voltage detecting circuit, and a first contact end, and the first power input terminal is configured to be connected to a first pin of the two-legged charger, The first contact end is configured to be coupled to a metal portion of the outer casing of the two-legged charger, the voltage detecting circuit is configured to detect a voltage on the first branch circuit, and the second branch circuit includes a second power source An input end and a switching circuit, the second power input end is configured to be connected to a second pin of the two-leg charger, and the switching circuit is configured to be grounded to an output of the charging circuit of the two-leg charger And the switching circuit is configured to connect the second power input terminal of the first branch circuit or the second branch circuit to the two-leg charger according to a voltage detected by the voltage detecting circuit The output of the charging circuit is grounded.
本公开的实施例还提供一种两脚充电器，包括防漏电电路、充电电路和两个引脚，所述防漏电电路设置在所述两个引脚与所述充电电路之间，所述防漏电电路包括第一支路电路和第二支路电路，所述第一支路电路包括依次串联连接的第一电源输入端、电压检测电路、以及第一接触端，所述第一电源输入端配置为与两脚充电器的第一引脚连接，所述第一接触端配置为与所述两脚充电器的外壳的金属部分连接，所述电压检测电路配置为检测所述第一支路电路上的电压，所述第二支路电路包括第二电源输入端和切换电路，所述第二电源输入端配置为与所述两脚充电器的第二引脚连接，所述切换电路配置为与所述两脚充电器的充电电路的输出接地连接，且所述切换电路配置为根据所述电压检测电路检测到的电压，使得所述第一支路电路或者所述第二支路电路的所述第二电源输入端连接至所述两脚充电器的充电电路的输出接地。Embodiments of the present disclosure also provide a two-legged charger including a leakage preventing circuit, a charging circuit, and two pins, the leakage preventing circuit being disposed between the two pins and the charging circuit, The leakage prevention circuit includes a first branch circuit and a second branch circuit, and the first branch circuit includes a first power input terminal, a voltage detecting circuit, and a first contact end, which are sequentially connected in series, the first power input The end is configured to be coupled to the first pin of the two-leg charger, the first contact end is configured to be coupled to the metal portion of the housing of the two-leg charger, and the voltage detecting circuit is configured to detect the first branch a voltage on the circuit, the second branch circuit includes a second power input and a switching circuit, the second power input is configured to be coupled to a second pin of the two-leg charger, the switching circuit Configuring to be connected to an output ground of the charging circuit of the two-legged charger, and the switching circuit is configured to cause the first branch circuit or the second branch according to a voltage detected by the voltage detecting circuit Electricity It said second power input terminal connected to the output ground feet charger charging circuit.
本公开的实施例还提供一种防漏电充电方法，包括：在两脚充电器的第一引脚和第二引脚与充电电路之间设置防漏电电路；在使用所述两脚充电器对可充电电器设备进行充电的状态下，检测所述防漏电电路的第一支路电路上的电压；以及根据检测到的电压，控制所述两脚充电器的第一引脚或第二引脚连接至所述两脚充电器的充电电路的输出接地。An embodiment of the present disclosure further provides a leakage preventing charging method, comprising: providing a leakage preventing circuit between a first pin and a second pin of a two-pin charger and a charging circuit; The voltage on the first branch circuit of the leakage preventing circuit is detected in a state in which the rechargeable electrical device is charged; and the first pin or the second pin of the two-leg charger is controlled according to the detected voltage The output of the charging circuit connected to the two-legged charger is grounded.
本公开的实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行来实现本公开的实施例的防漏电充电方法。Embodiments of the present disclosure also provide a computer readable storage medium having stored therein computer executable instructions that are executed to implement a leakage prevention charging method of an embodiment of the present disclosure .
附图说明DRAWINGS
图1为两脚充电器的充电电路的示意图；1 is a schematic diagram of a charging circuit of a two-legged charger;
图2为本公开的实施例的防漏电电路的结构框图；2 is a structural block diagram of a leakage preventing circuit according to an embodiment of the present disclosure;
图3为本公开的实施例的防漏电电路的电路图；3 is a circuit diagram of a leakage preventing circuit of an embodiment of the present disclosure;
图4为本公开的实施例的两脚充电器的结构框图；4 is a structural block diagram of a two-legged charger according to an embodiment of the present disclosure;
图5为本公开的实施例的两脚充电器的示意图；5 is a schematic diagram of a two-legged charger of an embodiment of the present disclosure;
图6为本公开的实施例的两脚充电器中的充电电路的结构框图；以及6 is a structural block diagram of a charging circuit in a two-legged charger of an embodiment of the present disclosure;
图7为本公开的实施例的防漏电充电方法的流程图。FIG. 7 is a flow chart of a leakage prevention charging method according to an embodiment of the present disclosure.
具体实施方式Detailed ways
下面通过具体实施方式结合附图对本公开的实施例作进一步详细说明。The embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
图1示出了两脚充电器的充电电路的示意图。如图1所示，该充电电路中，低频率(例如50Hz)的220V交流信号从左端接入，被整流为198V直流信号，然后用例如场效应晶体管(相当于开关)把这个直流信号转换成高频(例如60KHz)的交流信号，然后通过变压器变压，输出峰峰值为15V的交流信号，再将该交流信号整流成12V、9V、或5V的直流信号，从右端输出。Figure 1 shows a schematic diagram of a charging circuit for a two-legged charger. As shown in FIG. 1, in the charging circuit, a low frequency (for example, 50 Hz) 220V AC signal is input from the left end, rectified to a 198V DC signal, and then converted into a DC signal by, for example, a field effect transistor (corresponding to a switch). The high-frequency (for example, 60KHz) AC signal is then transformed by a transformer to output an AC signal with a peak-to-peak value of 15V, and the AC signal is rectified into a 12V, 9V, or 5V DC signal, which is output from the right end.
所述两脚充电器的充电电路中，电容器CY1作为交流(高频)接地，能够防止其右侧的电路中产生高频干扰，又不会使该充电电路的工作接地与输出接地连接，可以具有高耐压、小电容等特性。但是，由于两脚充电器不具有保护接地(PE)，使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，可充电电器设备的金属外壳上会存在感应电压。例如，在所述两脚充电器的充电电路中的电容器CY1的电容是1nF的情况下，使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，经测量，可充电电器设备的金属外壳与大地之间存在±80V、35μA的交流电。在人体触碰可充电电器设备的金属外壳时，该交流电会使人体产生轻微发麻的感觉，如果所述两脚充电器在使用过程中发生漏电，该漏电电压会直接对人体产生伤害。In the charging circuit of the two-leg charger, the capacitor CY1 is grounded as an alternating current (high frequency), which can prevent high-frequency interference in the circuit on the right side thereof, and does not connect the working ground of the charging circuit to the output ground. It has high withstand voltage and small capacitance. However, since the two-legged charger does not have a protective ground (PE), when the two-legged charger is used to charge a rechargeable electrical device having a metal casing, an induced voltage is present on the metal casing of the rechargeable electrical device. For example, in the case where the capacitance of the capacitor CY1 in the charging circuit of the two-legged charger is 1 nF, when the two-legged charger is used to charge a rechargeable electric appliance having a metal casing, the rechargeable electric appliance is measured. There is ±80V, 35μA AC between the metal casing of the device and the earth. When the human body touches the metal casing of the rechargeable electrical device, the alternating current causes a slight tingling feeling to the human body. If the two-legged charger leaks during use, the leakage voltage directly causes harm to the human body.
图2示出了本公开的实施例的防漏电电路的结构框图。所述防漏电电路可以设置在两脚充电器的两个引脚与充电电路之间。如图2所示，所述防漏电电路包括第一支路电路11和第二支路电路12。第一支路电路11包括依次串联连接的第一电源输入端111、电压检测电路112和第一接触端113，第一电源输入端111与两脚充电器的第一引脚连接，第一接触端113与两脚充电器的外壳连接，具体地与两脚充电器的外壳上的接地端连接。第二支路电路12包括第二电源输入端121和切换电路122，第二电源输入端121与两脚充电器的第二引脚连接，切换电路122与两脚充电器的充电电路的输出接地连接。FIG. 2 is a block diagram showing the structure of a leakage preventing circuit of an embodiment of the present disclosure. The leakage preventing circuit can be disposed between the two pins of the two-legged charger and the charging circuit. As shown in FIG. 2, the leakage prevention circuit includes a first branch circuit 11 and a second branch circuit 12. The first branch circuit 11 includes a first power input terminal 111, a voltage detecting circuit 112 and a first contact end 113 connected in series in series, and the first power input terminal 111 is connected to the first pin of the two-leg charger, the first contact The terminal 113 is connected to the housing of the two-leg charger, specifically to the ground terminal on the housing of the two-leg charger. The second branch circuit 12 includes a second power input terminal 121 and a switching circuit 122. The second power input terminal 121 is connected to the second pin of the two-leg charger, and the output of the switching circuit 122 and the charging circuit of the two-leg charger is grounded. connection.
在使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，所述两脚充电器的充电电路的输出接地与正被充电的可充电电器设备的金属外壳连接。When charging the rechargeable electrical device having the metal casing using the two-legged charger, the output ground of the charging circuit of the two-legged charger is connected to the metal casing of the rechargeable electrical device being charged.
在一些实施方式中，将两脚充电器的外壳设置为包括金属部分，第一接触端113与该金属部分连接，或者该金属部分直接作为第一接触端113。In some embodiments, the outer casing of the two-legged charger is arranged to include a metal portion, the first contact end 113 is connected to the metal portion, or the metal portion is directly used as the first contact end 113.
当用户将所述两脚充电器***到电源插座中时，用户的手与所述两脚充电器的外壳的金属部分接触，第一接触端113通过人体与大地连接，从而第一支路电路11形成回路。When the user inserts the two-legged charger into the power socket, the user's hand contacts the metal portion of the outer casing of the two-legged charger, and the first contact end 113 is connected to the earth through the human body, thereby the first branch circuit 11 forms a loop.
所述电压检测电路112配置为检测第一支路电路11上的电压，所述切换电路122配置为根据所述电压检测电路112检测到的电压控制所述第二支路电路12的工作状态，从而控制两脚充电器的充电电路的输出接地通过所述切换电路122连接至第一支路电路11或第二支路电路12的第二电源输入端121。The voltage detecting circuit 112 is configured to detect a voltage on the first branch circuit 11, and the switching circuit 122 is configured to control an operating state of the second branch circuit 12 according to a voltage detected by the voltage detecting circuit 112. Thereby, the output ground of the charging circuit controlling the two-legged charger is connected to the second branch input terminal 11 of the first branch circuit 11 or the second branch circuit 12 via the switching circuit 122.
具体地，电压检测电路112检测第一支路电路11上是否存在有效电压。若第一支路电路11上存在有效电压，即电压实质上不为零，则说明第一支路电路11的第一电源输入端111与电源插座中的火线连接，第二支路电路12的第二电源输入端121与电源插座中的零线连。若第一支路电路11上不存在有效电压，即电压实质上为零，则说明第一支路电路11的第一电源输入端111与电源插座中的零线连接，第二支路电路12的第二电源输入端121与电源插座中的火线连 接。Specifically, the voltage detecting circuit 112 detects whether or not there is an effective voltage on the first branch circuit 11. If there is an effective voltage on the first branch circuit 11, that is, the voltage is substantially zero, the first power input terminal 111 of the first branch circuit 11 is connected to the live line in the power socket, and the second branch circuit 12 is The second power input terminal 121 is connected to the neutral line in the power outlet. If there is no effective voltage on the first branch circuit 11, that is, the voltage is substantially zero, the first power input terminal 111 of the first branch circuit 11 is connected to the neutral line in the power socket, and the second branch circuit 12 is connected. The second power input terminal 121 is connected to the live wire in the power socket.
在第一支路电路11上存在有效电压的情况下，即第一支路电路11的第一电源输入端111与电源插座中的火线连接，第二支路电路12的第二电源输入端121与电源插座中的零线连接，切换电路122将使得第二支路电路12的第二电源输入端121通过切换电路122与两脚充电器的充电电路的输出接地连接。在第一支路电路11上不存在有效电压的情况下，即第一支路电路11的第一电源输入端111与电源插座中的零线连接，第二支路电路12的第二电源输入端121与电源插座中的火线连接，切换电路122将使得第一支路电路11通过切换电路122与两脚充电器的充电电路的输出接地连接。In the case where there is an effective voltage on the first branch circuit 11, that is, the first power input terminal 111 of the first branch circuit 11 is connected to the live line in the power socket, and the second power input terminal 121 of the second branch circuit 12 is In connection with the neutral line in the power outlet, the switching circuit 122 will cause the second power input 121 of the second branch circuit 12 to be connected to the output ground of the charging circuit of the two-leg charger via the switching circuit 122. In the case where there is no effective voltage on the first branch circuit 11, that is, the first power input terminal 111 of the first branch circuit 11 is connected to the neutral line in the power socket, and the second power input of the second branch circuit 12 is The terminal 121 is connected to the live line in the power outlet, and the switching circuit 122 will cause the first branch circuit 11 to be grounded via the switching circuit 122 to the output of the charging circuit of the two-legged charger.
应当理解，通过将本公开的实施例的防漏电电路设置在两脚充电器的两个引脚与充电电路之间，在使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，电源插座中的零线与所述两脚充电器的充电电路的输出接地连接，从而可充电电器设备的金属外壳与电源插座中的零线连接，避免了漏电的发生，也避免了可充电电器设备的金属外壳上存在高感应电压，消除了安全隐患。It should be understood that by providing the leakage preventing circuit of the embodiment of the present disclosure between the two pins of the two-legged charger and the charging circuit, the rechargeable electric device having the metal casing is charged using the two-legged charger. When the neutral line in the power socket is connected to the output ground of the charging circuit of the two-legged charger, the metal casing of the rechargeable electrical device is connected with the neutral wire in the power socket, thereby avoiding leakage and avoiding the occurrence of leakage. There is a high induced voltage on the metal casing of the charging electrical equipment, which eliminates safety hazards.
在一些实施方式中，所述第二支路电路12还包括第一保险丝123，所述第一保险丝123串联于所述切换电路122与两脚充电器的充电电路的输出接地之间。In some embodiments, the second branch circuit 12 further includes a first fuse 123 that is connected in series between the switching circuit 122 and the output ground of the charging circuit of the two-legged charger.
在一些实施方式中，所述切换电路122包括场效应晶体管。在所述电压检测电路112检测到所述第一支路电路11上的电压实质上不为零时，控制所述场效应晶体管的连接至所述第二支路电路12的第二电源输入端121的PN结导通，使得所述第二支路电路12的第二电源输入端121与两脚充电器的充电电路的输出接地接通，并且控制所述场效应晶体管的连接至第一支路电路11的PN结关断，使得所述第一支路电路11与两脚充电器的充电电路的输出接地断开。在所述电压检测电路112检测到所述第一支路电路11上的电压实质上为零时，控制所述场效应晶体管的连接至第一支路电路11的PN结导通，使得所述第一支路电路11与两脚充电器的充电电路的输出接地接通，并且控制所述场效应晶体管的连接至所述第二支路电路12的第二电 源输入端121的PN结关断，使得所述第二支路电路12的第二电源输入端121与两脚充电器的充电电路的输出接地之间断开。In some embodiments, the switching circuit 122 includes a field effect transistor. Controlling, by the voltage detecting circuit 112, that the voltage on the first branch circuit 11 is substantially not zero, controlling the second power input terminal of the field effect transistor connected to the second branch circuit 12 The PN junction of 121 is turned on, such that the second power input terminal 121 of the second branch circuit 12 is connected to the output of the charging circuit of the two-leg charger, and the connection of the field effect transistor to the first branch is controlled. The PN junction of the circuit 11 is turned off, causing the first branch circuit 11 to be disconnected from the output of the charging circuit of the two-legged charger. When the voltage detecting circuit 112 detects that the voltage on the first branch circuit 11 is substantially zero, controlling the PN junction of the field effect transistor connected to the first branch circuit 11 to be turned on, so that the The first branch circuit 11 is turned on with the output of the charging circuit of the two-legged charger, and controls the PN junction of the field effect transistor connected to the second power input terminal 121 of the second branch circuit 12 to be turned off. The first power input terminal 121 of the second branch circuit 12 is disconnected from the output ground of the charging circuit of the two-legged charger.
可以通过控制输入到所述场效应晶体管的控制端的信号来控制所述场效应晶体管的导通或关断。例如，可以将所述电压检测电路112检测到的第一支路电路11上的电压的信号输入至所述场效应晶体管的控制端来控制所述场效应晶体管的PN结的导通或关断。The turn-on or turn-off of the field effect transistor can be controlled by controlling a signal input to the control terminal of the field effect transistor. For example, a signal of a voltage on the first branch circuit 11 detected by the voltage detecting circuit 112 may be input to a control terminal of the field effect transistor to control turn-on or turn-off of a PN junction of the field effect transistor. .
应当理解的是，所述切换电路122可包括两个或更多开关晶体管，例如，包括连接在所述第一支路电路11与两脚充电器的充电电路的输出接地之间的开关晶体管和连接在所述第二支路电路12的第二电源输入端121与两脚充电器的充电电路的输出接地之间的开关晶体管。作为示例，可以将所述电压检测电路112检测到的第一支路电路11上的电压的信号及其反向信号分别输入至所述两个开关晶体管的控制端来控制所述多个开关晶体管的导通或关断。It should be understood that the switching circuit 122 may include two or more switching transistors, for example, including a switching transistor connected between the first branch circuit 11 and the output ground of the charging circuit of the two-leg charger. A switching transistor is connected between the second power input terminal 121 of the second branch circuit 12 and the output ground of the charging circuit of the two-legged charger. As an example, a signal of a voltage on the first branch circuit 11 detected by the voltage detecting circuit 112 and a reverse signal thereof may be input to control ends of the two switching transistors, respectively, to control the plurality of switching transistors. Turn on or off.
在一些实施方式中，所述切换电路122还可以是继电器，该继电器上的常闭触点可与第一支路电路11连接，该继电器上的常开触点与第二支路电路12的第二电源输入端121连接，当电压检测电路112检测到第一支路电路11上存在有效电压时，即电压实质上不为零，所述继电器会将常闭触点断开，闭合常开触点，从而实现将第二支路的第二电源输入端121与两脚充电器的充电电路的输出接地连接。In some embodiments, the switching circuit 122 can also be a relay, the normally closed contact on the relay can be connected to the first branch circuit 11, the normally open contact on the relay and the second branch circuit 12 The second power input terminal 121 is connected. When the voltage detecting circuit 112 detects that there is an effective voltage on the first branch circuit 11, that is, the voltage is substantially zero, the relay will open the normally closed contact and close normally. The contacts are such that the second power input 121 of the second branch is connected to the output of the charging circuit of the two-leg charger.
在一些实施方式中，所述电压检测电路112包括至少两个分压电阻，所述分压电阻依次串联在所述第一支路电路11的第一电源输入端111和第一接触端113之间。通过检测所述分压电阻上是否存在有效电压降，所述电压检测电路112检测第一支路11上是否存在有效电压。In some embodiments, the voltage detecting circuit 112 includes at least two voltage dividing resistors, which are sequentially connected in series at the first power input end 111 and the first contact end 113 of the first branch circuit 11 between. The voltage detecting circuit 112 detects whether or not there is an effective voltage on the first branch 11 by detecting whether there is an effective voltage drop across the voltage dividing resistor.
在一些实施方式中，所述至少两个分压电阻串联或并联。In some embodiments, the at least two voltage dividing resistors are connected in series or in parallel.
应当理解，根据需要，所述电压检测电路112可以包括串联电阻和并联电阻的组合。It should be understood that the voltage detection circuit 112 can include a combination of series resistance and parallel resistance, as desired.
本公开的实施例的防漏电电路中，所述电压检测电路检测第一支路电路上的电压，所述切换电路根据所述电压控制所述第二支路电 路的工作状态，从而控制两脚充电器的充电电路的输出接地通过所述切换电路连接至第一支路电路或第二支路电路的第二电源输入端。利用本公开的实施例的防漏电电路，根据所述电压检测电路检测到的第一支路电路上的电压，能够识别出连接至两脚充电器的第一引脚和第二引脚的分别是火线还是零线，在所述两脚充电器***电源插座的瞬间，所述防漏电电路就可以识别出所述两脚充电器的第一引脚还是第二引脚连接火线，并使得所述两脚充电器的充电电路的输出接地与零线进行连接，从而实现将正被充电的可充电电器设备的金属外壳与零线连接，避免了漏电的发生，也避免了正被充电的可充电电器设备的金属外壳上存在高感应电压，消除了安全隐患，提高了用户在使用两脚充电器的安全性。In the leakage prevention circuit of the embodiment of the present disclosure, the voltage detecting circuit detects a voltage on the first branch circuit, and the switching circuit controls an operating state of the second branch circuit according to the voltage, thereby controlling two feet. The output ground of the charging circuit of the charger is connected to the second power input of the first branch circuit or the second branch circuit through the switching circuit. With the leakage preventing circuit of the embodiment of the present disclosure, according to the voltage on the first branch circuit detected by the voltage detecting circuit, the first pin and the second pin connected to the two-pin charger can be identified respectively Is the hot wire or the neutral wire, when the two-legged charger is inserted into the power socket, the leakage preventing circuit can recognize whether the first pin or the second pin of the two-pin charger is connected to the live wire, and The output ground of the charging circuit of the two-legged charger is connected with the neutral line, thereby connecting the metal casing of the rechargeable electrical device being charged with the neutral wire, thereby avoiding the occurrence of leakage and avoiding being charged. The high induction voltage on the metal casing of the charging electrical equipment eliminates the safety hazard and improves the safety of the user using the two-legged charger.
下面结合具体的电路图对本公开的实施例的防漏电电路做详细的说明。The leakage prevention circuit of the embodiment of the present disclosure will be described in detail below with reference to specific circuit diagrams.
图3示出了本公开的实施例的防漏电电路的电路图。如图3所示，所述防漏电电路包括第一支路电路和第二支路电路。所述第一支路电路包括通过串联连接方式连接在一起的第一电源输入端111、第一分压阻R1、第二分压电阻R2和第一接触端113，所述第一电源输入端111与两脚充电器的第一引脚连接，所述第一接触端113与两脚充电器的外壳上的金属部分连接。所述第二支路电路包括第二电源输入端121和开关晶体管M1，第二电源输入端121与两脚充电器的第二引脚连接，开管晶体管M1与两脚充电器的充电电路的输出接地连接。FIG. 3 shows a circuit diagram of a leakage preventing circuit of an embodiment of the present disclosure. As shown in FIG. 3, the leakage prevention circuit includes a first branch circuit and a second branch circuit. The first branch circuit includes a first power input terminal 111 connected by a series connection, a first voltage dividing resistor R1, a second voltage dividing resistor R2, and a first contact end 113, the first power input end 111 is coupled to the first pin of the two-legged charger, the first contact end 113 being coupled to the metal portion of the housing of the two-legged charger. The second branch circuit includes a second power input terminal 121 and a switching transistor M1, and the second power input terminal 121 is connected to the second pin of the two-leg charger, and the charging circuit of the open transistor M1 and the two-leg charger Output ground connection.
在使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，所述两脚充电器的充电电路的输出接地与正被充电的可充电电器设备的金属外壳连接。When charging the rechargeable electrical device having the metal casing using the two-legged charger, the output ground of the charging circuit of the two-legged charger is connected to the metal casing of the rechargeable electrical device being charged.
在一些实施方式中，两脚充电器的外壳上的金属部分可直接作为第一接触端113。In some embodiments, the metal portion on the outer casing of the two-legged charger can directly function as the first contact end 113.
当用户将所述两脚充电器***到电源插座中时，用户的手与所述两脚充电器的外壳上的金属部分接触，第一接触端113通过人体与 大地连接，从而第一支路电路形成回路。When the user inserts the two-legged charger into the power socket, the user's hand contacts the metal portion on the outer casing of the two-leg charger, and the first contact end 113 is connected to the earth through the human body, thereby the first branch The circuit forms a loop.
在一些实施方式中，在用户将所述两脚充电器***到电源插座中以对具有金属外壳的可充电电器设备进行充电、且用户的手与所述两脚充电器的外壳上的金属部分接触时，若检测到第一分压电阻R1和第二分压电阻R2上存在有效电压降，则表示第一支路电路的第一电源输入端111与电源插座中的火线连接，第二支路电路的第二电源输入端121与电源插座中的零线连，若检测到第一分压电阻R1和第二分压电阻R2上不存在有效电压降，则表示第一支路电路与电源插座中的零线连接，第二支路电路的第二电源输入端121与电源插座中的火线连接。In some embodiments, the user inserts the two-legged charger into a power outlet to charge a rechargeable electrical device having a metal outer casing, and the metal portion of the user's hand and the outer casing of the two-legged charger When contact occurs, if there is an effective voltage drop detected on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, it indicates that the first power input terminal 111 of the first branch circuit is connected to the live line in the power socket, and the second branch The second power input terminal 121 of the circuit circuit is connected to the neutral line in the power socket. If there is no effective voltage drop detected on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, the first branch circuit and the power source are indicated. A neutral connection in the socket, the second power input 121 of the second branch circuit is connected to the live line in the power outlet.
当检测到第一分压电阻R1和第二分压电阻R2上存在有效电压降时，即电压降实质上不为零，通过控制开关晶体管M1的控制端的输入，使得开关晶体管M1的连接至第二支路电路的第二电源输入端121的PN结导通，第二支路电路的第二电源输入端121与两脚充电器的充电电路的输出接地接通，并且使得开关晶体管M1的连接至第一支路电路的PN结关断，第一支路电路与两脚充电器的充电电路的输出接地断开。When it is detected that there is an effective voltage drop on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, that is, the voltage drop is substantially zero, by controlling the input of the control terminal of the switching transistor M1, the switching transistor M1 is connected to the first The PN junction of the second power input terminal 121 of the two-branch circuit is turned on, the second power input terminal 121 of the second branch circuit is connected to the output of the charging circuit of the two-leg charger, and the connection of the switching transistor M1 is made. The PN junction to the first branch circuit is turned off, and the output of the first branch circuit is disconnected from the output of the charging circuit of the two-leg charger.
当检测到第一分压电阻R1和第二分压电阻R2上不存在有效电压降时，即电压降实质上为零，通过控制开关晶体管M1的控制端的输入，使得开关晶体管M1的连接至第一支路电路的PN结导通，第一支路电路与两脚充电器的充电电路的输出接地接通，并且使得开关晶体管M1的连接至第二支路电路的第二电源输入端121的PN结关断，第二支路电路的第二电源输入端121与两脚充电器的充电电路的输出接地断开。When it is detected that there is no effective voltage drop on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, that is, the voltage drop is substantially zero, by controlling the input of the control terminal of the switching transistor M1, the connection of the switching transistor M1 is made to The PN junction of one of the circuit circuits is turned on, the first branch circuit is connected to the output of the charging circuit of the two-leg charger, and the connection of the switching transistor M1 to the second power input terminal 121 of the second branch circuit is The PN junction is turned off, and the second power input terminal 121 of the second branch circuit is disconnected from the output ground of the charging circuit of the two-leg charger.
应当理解，通过将本公开的实施例的防漏电电路设置在两脚充电器的两个引脚与充电电路之间，在使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，电源插座中的零线与所述两脚充电器的充电电路的输出接地连接，从而可充电电器设备的金属外壳与电源插座中的零线连接，避免了漏电的发生，也避免了可充电电器设备的金属外壳上存在高感应电压，消除了安全隐患。It should be understood that by providing the leakage preventing circuit of the embodiment of the present disclosure between the two pins of the two-legged charger and the charging circuit, the rechargeable electric device having the metal casing is charged using the two-legged charger. When the neutral line in the power socket is connected to the output ground of the charging circuit of the two-legged charger, the metal casing of the rechargeable electrical device is connected with the neutral wire in the power socket, thereby avoiding leakage and avoiding the occurrence of leakage. There is a high induced voltage on the metal casing of the charging electrical equipment, which eliminates safety hazards.
在一些实施方式中，所述第二支路电路还包括第一保险丝123，所述第一保险丝123串联于所述开关晶体管M1与两脚充电器的充电电路的输出接地之间。In some embodiments, the second branch circuit further includes a first fuse 123 connected in series between the switching transistor M1 and an output ground of a charging circuit of a two-legged charger.
在一些实施方式中，所述开关晶体管M1的控制端连接于所述第一分压电阻R1和第二分压电阻R2之间，在用户将两脚充电器***到电源插座中的瞬间，用户的手与所述两脚充电器的外壳的金属部分接触，第一支路电路形成回路，并在第一分压电阻R1和第二分压电阻R2上存在电压降，第一分压电阻R1上的电压降和第二分压电阻R2上的电压降之差接入开关晶体管M1的控制端，以控制开关晶体管M1的PN结的导通或关断。In some embodiments, the control terminal of the switching transistor M1 is connected between the first voltage dividing resistor R1 and the second voltage dividing resistor R2, and the user inputs the two-pin charger into the power socket at the moment when the user inserts the two-pin charger into the power socket. The hand is in contact with the metal portion of the outer casing of the two-legged charger, the first branch circuit forms a loop, and a voltage drop exists on the first voltage dividing resistor R1 and the second voltage dividing resistor R2, and the first voltage dividing resistor R1 The difference between the voltage drop across and the voltage drop across the second voltage dividing resistor R2 is applied to the control terminal of the switching transistor M1 to control the turn-on or turn-off of the PN junction of the switching transistor M1.
在一些实施方式中，所述开关晶体管M1可以被继电器代替，当第一支路电路上存在有效电压时，继电器使第二支路电路的第二电源输入端121与两脚充电器的充电电路的输出接地接通，当第一支路电路上不存在有效电压时，继电器使第一支路电路与两脚充电器的充电电路的输出接地接通。In some embodiments, the switching transistor M1 can be replaced by a relay. When the effective voltage is present on the first branch circuit, the relay causes the second power input terminal 121 of the second branch circuit and the charging circuit of the two-leg charger. The output is grounded. When there is no effective voltage on the first branch circuit, the relay connects the first branch circuit to the output of the charging circuit of the two-pin charger.
图4示出了本公开的实施例的两脚充电器的结构框图。如图4所示，该充电器包括防漏电电路41、充电电路42、第一引脚43和第二引脚44。所述防漏电电路41设置于所述充电电路42与第一引脚43和第二引脚44之间，且所述防漏电电路41包括第一支路电路和第二支路电路。所述第一支路电路与第一引脚43电连接，所述第二支路电路与第二引脚44电连接。4 is a block diagram showing the structure of a two-legged charger of an embodiment of the present disclosure. As shown in FIG. 4, the charger includes a leakage preventing circuit 41, a charging circuit 42, a first pin 43 and a second pin 44. The leakage preventing circuit 41 is disposed between the charging circuit 42 and the first pin 43 and the second pin 44, and the leakage preventing circuit 41 includes a first branch circuit and a second branch circuit. The first branch circuit is electrically connected to the first pin 43 and the second branch circuit is electrically connected to the second pin 44.
再次参照图2，第一支路电路包括依次串联连接的第一电源输入端111、电压检测电路112和第一接触端113，第一电源输入端111与两脚充电器的第一引脚连接，第一接触端113与两脚充电器的外壳的金属部分连接。第二支路电路包括第二电源输入端121和切换电路122，第二电源输入端121与两脚充电器的第二引脚连接，切换电路122与两脚充电器的充电电路的输出接地连接。Referring again to FIG. 2, the first branch circuit includes a first power input terminal 111, a voltage detecting circuit 112, and a first contact end 113 connected in series, and the first power input terminal 111 is connected to the first pin of the two-leg charger. The first contact end 113 is connected to the metal portion of the outer casing of the two-legged charger. The second branch circuit includes a second power input terminal 121 and a switching circuit 122. The second power input terminal 121 is connected to the second pin of the two-pin charger, and the switching circuit 122 is connected to the output of the charging circuit of the two-leg charger. .
图6示出了本公开的实施例的两脚充电器中的充电电路的结构框图。FIG. 6 is a block diagram showing the structure of a charging circuit in a two-legged charger of an embodiment of the present disclosure.
如图6所示，在一些实施方式中，所述充电电路42包括整流模块422、变压器423、稳压模块424和安全电容器425。As shown in FIG. 6, in some embodiments, the charging circuit 42 includes a rectifier module 422, a transformer 423, a voltage stabilization module 424, and a safety capacitor 425.
在一些实施方式中，所述充电电路42例如为图1所示的充电电路。In some embodiments, the charging circuit 42 is, for example, the charging circuit shown in FIG.
在使用本公开的实施例的两脚充电器对具有金属外壳的可充电电器设备进行充电时，电源插座中的零线与所述两脚充电器的充电电路的输出接地连接，从而可充电电器设备的金属外壳与电源插座中的零线连接，避免了漏电的发生，也避免了可充电电器设备的金属外壳上存在高感应电压，消除了安全隐患。When charging a rechargeable electrical device having a metal casing using the two-legged charger of the embodiment of the present disclosure, the neutral wire in the power socket is grounded to the output of the charging circuit of the two-legged charger, thereby enabling the rechargeable electrical appliance The metal casing of the equipment is connected to the neutral wire in the power socket to avoid leakage, and the high induction voltage on the metal casing of the rechargeable electrical equipment is avoided, thereby eliminating safety hazards.
为了使本公开的实施例的两脚充电器在充电过程中更加安全，如图6所示，所述充电电路42还可设置有第二保险丝421，该第二保险丝421配置为保证所述两脚充电器在***电源插座时可能出现瞬间大电流导致漏电的情况下的安全性。如图6所示，所述第二保险丝421可串联在所述充电电路42的所述安全电容器425与所述两脚充电器的输出接地之间。In order to make the two-legged charger of the embodiment of the present disclosure more secure during charging, as shown in FIG. 6, the charging circuit 42 may further be provided with a second fuse 421 configured to ensure the two When the foot charger is plugged into a power outlet, it may be safe in case of a large current causing leakage. As shown in FIG. 6, the second fuse 421 can be connected in series between the safety capacitor 425 of the charging circuit 42 and the output ground of the two-legged charger.
在所述充电电路42为图1所示的充电电路的情况下，所述第二保险丝421可连接在所述充电电路的电容器CY1与所述充电电路的输出接地之间。In the case where the charging circuit 42 is the charging circuit shown in FIG. 1, the second fuse 421 can be connected between the capacitor CY1 of the charging circuit and the output ground of the charging circuit.
图5示出了本公开的实施例的两脚充电器的示意图。FIG. 5 shows a schematic diagram of a two-legged charger of an embodiment of the present disclosure.
本公开的实施例的两脚充电器设置有防漏电电路，通过检测防漏电电路的第一支路电路上的电压，所述切换电路根据所述电压控制两脚充电器的充电电路的输出接地通过所述切换电路连接至第一支路电路或第二支路电路的第二电源输入端，从而实现将正被充电的可充电电器设备的金属外壳与电源插座中的零线连接，避免了漏电的发生，也避免了正被充电的可充电电器设备的金属外壳上存在高感应电压，消除了安全隐患，提高了用户在使用两脚充电器的安全性。The two-legged charger of the embodiment of the present disclosure is provided with a leakage preventing circuit for detecting the voltage on the first branch circuit of the leakage preventing circuit, and the switching circuit controls the output of the charging circuit of the two-legged charger according to the voltage. Connecting to the second power input terminal of the first branch circuit or the second branch circuit through the switching circuit, thereby connecting the metal casing of the rechargeable electrical device being charged with the neutral wire in the power socket, thereby avoiding The occurrence of leakage also avoids the presence of high induced voltage on the metal casing of the rechargeable electrical equipment being charged, eliminating safety hazards and improving the safety of the user using the two-legged charger.
图7示出了本公开的实施例的防漏电充电方法的流程图。FIG. 7 shows a flow chart of a leakage prevention charging method of an embodiment of the present disclosure.
如图7所示，所述防漏电充电方法包括步骤S701至S703。As shown in FIG. 7, the leakage prevention charging method includes steps S701 to S703.
S701，在两脚充电器的两引脚(即，第一引脚和第二引脚)与 充电电路之间设置防漏电电路，该防漏电电路为本公开的实施例的防漏电电路。S701, a leakage preventing circuit is disposed between the two pins of the two-pin charger (ie, the first pin and the second pin) and the charging circuit, and the leakage preventing circuit is the leakage preventing circuit of the embodiment of the present disclosure.
如上所述，所述防漏电电路包括第一支路电路和第二支路电路，第一支路电路连接至两脚充电器的第一引脚，第二支路电路连接至两脚充电器的第二引脚。As described above, the leakage prevention circuit includes a first branch circuit connected to the first pin of the two-leg charger, and a second branch circuit connected to the two-leg charger The second pin.
S702，检测防漏电电路的第一支路电路上的电压。S702. Detect a voltage on the first branch circuit of the leakage prevention circuit.
在该步骤中，当检测到的电压实质上不为零时，则说明第一引脚与电源插座中的火线连接，第二引脚与电源插座中的零线连接，当检测到的电压实质上为零时，则说明第一引脚与电源插座中的零线连接，第二引脚与电源插座中的火线连接。In this step, when the detected voltage is substantially not zero, the first pin is connected to the live wire in the power socket, and the second pin is connected to the neutral wire in the power socket when the detected voltage is substantially When it is zero, the first pin is connected to the neutral wire in the power socket, and the second pin is connected to the live wire in the power socket.
S703，根据检测到的电压，控制所述两脚充电器的第一引脚或第二引脚连接至所述两脚充电器的充电电路的输出接地。S703. Control a first pin or a second pin of the two-pin charger to be connected to an output ground of a charging circuit of the two-leg charger according to the detected voltage.
当检测到的电压实质上不为零，则将所述两脚充电器的第二引脚连接至所述两脚充电器的充电电路的输出接地。When the detected voltage is substantially not zero, the second pin of the two-legged charger is connected to the output ground of the charging circuit of the two-legged charger.
当检测到的电压实质上为零，则将所述两脚充电器的第一引脚连接至所述两脚充电器的充电电路的输出接地。When the detected voltage is substantially zero, the first pin of the two-legged charger is connected to the output ground of the charging circuit of the two-legged charger.
在使用所述两脚充电器对具有金属外壳的可充电电器设备进行充电时，所述两脚充电器的充电电路的输出接地与正被充电的可充电电器设备的金属外壳连接。When charging the rechargeable electrical device having the metal casing using the two-legged charger, the output ground of the charging circuit of the two-legged charger is connected to the metal casing of the rechargeable electrical device being charged.
本公开的实施例的防漏电充电方法，通过设置防漏电电路并检测防漏电电路的第一支路电路上的电压，控制两脚充电器的充电电路的输出接地连接至所述两脚充电器的第一引脚或第二引脚，从而实现将正被充电的可充电电器设备的金属外壳与电源插座中的零线连接，避免了漏电的发生，也避免了正被充电的可充电电器设备的金属外壳上存在高感应电压，消除了安全隐患，提高了用户在使用两脚充电器的安全性。The anti-leakage charging method of the embodiment of the present disclosure controls the output ground of the charging circuit of the two-legged charger to be connected to the two-legged charger by setting a leakage preventing circuit and detecting a voltage on the first branch circuit of the leakage preventing circuit. The first pin or the second pin, thereby connecting the metal casing of the rechargeable electrical device being charged with the neutral wire in the power socket, avoiding the occurrence of leakage, and avoiding the rechargeable electric appliance being charged The high induction voltage on the metal casing of the device eliminates safety hazards and improves the safety of the user using the two-legged charger.
本领域的技术人员应该明白，上述本公开的实施例的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上。上述本公开的实施例的各模块或各步骤也可以由计算装置可执行的程序代码来实现，从 而，可以将它们存储在计算机存储介质(ROM/RAM、磁碟、光盘)中由计算装置来读取并执行。在某些情况下，可以以不同于本公开所示的顺序执行本公开所示出或描述的步骤。上述本公开的实施例的各模块或各步骤可以被分别制作成各个集成电路模块，或者可以将部分模块或部分步骤集成为单个集成电路模块来实现。本公开不限于任何特定的硬件、软件或其结合。It will be apparent to those skilled in the art that the various modules or steps of the above-described embodiments of the present disclosure may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices. on. The modules or the steps of the above embodiments of the present disclosure may also be implemented by program code executable by the computing device, so that they may be stored in a computer storage medium (ROM/RAM, disk, optical disk) by the computing device. Read and execute. In some cases, the steps shown or described in this disclosure may be performed in an order different than that shown in the present disclosure. The various modules or steps of the above-described embodiments of the present disclosure may be separately fabricated into individual integrated circuit modules, or a partial module or a partial step may be integrated into a single integrated circuit module. The present disclosure is not limited to any specific hardware, software, or combination thereof.
以上内容是结合具体的实施方式对本公开的实施例所作的进一步详细说明，不能认定本公开的具体实施方式只局限于这些说明。对于本公开所属技术领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以进行各种简单推演或替换，这些都应当视为落入本公开的保护范围。The above is a detailed description of the embodiments of the present disclosure in conjunction with the specific embodiments, and the specific embodiments of the present disclosure are not limited to the description. Various simple derivations or substitutions may be made without departing from the spirit and scope of the present disclosure.

Claims (14)

  1. 一种防漏电电路，配置为设置在两脚充电器的两个引脚与充电电路之间，所述防漏电电路包括第一支路电路和第二支路电路，An anti-leakage circuit configured to be disposed between two pins of a two-legged charger and a charging circuit, the leakage preventing circuit comprising a first branch circuit and a second branch circuit,
    所述第一支路电路包括依次串联连接的第一电源输入端、电压检测电路、以及第一接触端，所述第一电源输入端配置为与两脚充电器的第一引脚连接，所述第一接触端配置为与所述两脚充电器的外壳的金属部分连接，所述电压检测电路配置为检测所述第一支路电路上的电压，The first branch circuit includes a first power input terminal, a voltage detecting circuit, and a first contact end connected in series, and the first power input terminal is configured to be connected to the first pin of the two-leg charger. The first contact end is configured to be connected to a metal portion of the outer casing of the two-legged charger, and the voltage detecting circuit is configured to detect a voltage on the first branch circuit,
    所述第二支路电路包括第二电源输入端和切换电路，所述第二电源输入端配置为与所述两脚充电器的第二引脚连接，所述切换电路配置为与所述两脚充电器的充电电路的输出接地连接，且所述切换电路配置为根据所述电压检测电路检测到的电压，使得所述第一支路电路或者所述第二支路电路的所述第二电源输入端连接至所述两脚充电器的充电电路的输出接地。The second branch circuit includes a second power input end and a switching circuit, the second power input end is configured to be connected to the second pin of the two-leg charger, and the switching circuit is configured to be opposite to the two An output of the charging circuit of the foot charger is grounded, and the switching circuit is configured to cause the first branch circuit or the second of the second branch circuit to be based on a voltage detected by the voltage detecting circuit The power input is connected to the output ground of the charging circuit of the two-legged charger.
  2. 如权利要求1所述的防漏电电路，其中，所述第二支路电路还包括第一保险丝，所述第一保险丝串联于所述切换电路与所述两脚充电器的充电电路的输出接地之间。A leakage preventing circuit according to claim 1, wherein said second branch circuit further comprises a first fuse, said first fuse being connected in series with said switching circuit and an output of said charging circuit of said two-legged charger between.
  3. 如权利要求1所述的防漏电电路，其中，所述切换电路包括场效应晶体管，在所述电压检测电路检测到所述第一支路电路上的电压实质上不为零时，所述场效应晶体管使得所述第二支路电路的所述第二电源输入端与所述两脚充电器的充电电路的输出接地接通，所述第一支路电路与所述两脚充电器的充电电路的输出接地断开。The leakage preventing circuit of claim 1 wherein said switching circuit comprises a field effect transistor, said field being detected when said voltage detecting circuit detects that said voltage on said first branch circuit is substantially non-zero The effect transistor enables the second power input terminal of the second branch circuit to be connected to the output ground of the charging circuit of the two-legged charger, the first branch circuit and the charging of the two-leg charger The output of the circuit is grounded.
  4. 如权利要求1所述的防漏电电路，其中，所述切换电路包括场效应晶体管，在所述电压检测电路检测到所述第一支路电路上的电压实质上为零时，所述场效应晶体管使得所述第一支路电路与所述两脚充电器的充电电路的输出接地接通，所述第二支路电路的所述第二 电源输入端与所述两脚充电器的充电电路的输出接地断开。A leakage preventing circuit according to claim 1, wherein said switching circuit comprises a field effect transistor, said field effect when said voltage detecting circuit detects that said voltage on said first branch circuit is substantially zero The transistor causes the first branch circuit to be grounded with an output of the charging circuit of the two-legged charger, the second power input end of the second branch circuit and the charging circuit of the two-leg charger The output is grounded off.
  5. 如权利要求1所述的防漏电电路，其中，所述切换电路包括继电器，所述继电器的常开触点与所述第二支路电路的所述第二电源输入端连接，所述继电器的常闭触点与所述第一支路电路连接，The leakage preventing circuit of claim 1 wherein said switching circuit includes a relay, said normally open contact of said relay being coupled to said second power input of said second branch circuit, said relay a normally closed contact is connected to the first branch circuit,
    在所述电压检测电路检测到所述第一支路电路上的电压实质上不为零时，所述继电器的常闭触点断开，所述继电器的常开触点闭合，使得所述第二支路电路的所述第二电源输入端与所述两脚充电器的充电电路的输出接地连接，所述第一支路电路与所述两脚充电器的充电电路的输出接地断开。When the voltage detecting circuit detects that the voltage on the first branch circuit is substantially not zero, the normally closed contact of the relay is turned off, and the normally open contact of the relay is closed, so that the first The second power input end of the two-branch circuit is connected to the output ground of the charging circuit of the two-legged charger, and the first branch circuit is disconnected from the output ground of the charging circuit of the two-legged charger.
  6. 如权利要求1所述的防漏电电路，其中，所述切换电路包括继电器，所述继电器的常闭触点与所述第二支路电路的所述第二电源输入端连接，所述继电器的常开触点与所述第一支路电路连接，The leakage preventing circuit of claim 1 wherein said switching circuit includes a relay, said normally closed contact of said relay being coupled to said second power input of said second branch circuit, said relay a normally open contact is connected to the first branch circuit,
    在所述电压检测电路检测到所述第一支路电路上的电压实质上为零时，所述继电器的常闭触点断开，所述继电器的常开触点闭合，使得所述第二支路电路的所述第二电源输入端与所述两脚充电器的充电电路的输出接地断开，所述第一支路电路与所述两脚充电器的充电电路的输出接地接通。When the voltage detecting circuit detects that the voltage on the first branch circuit is substantially zero, the normally closed contact of the relay is turned off, and the normally open contact of the relay is closed, so that the second The second power input terminal of the branch circuit is disconnected from the output ground of the charging circuit of the two-leg charger, and the output of the first branch circuit and the charging circuit of the two-leg charger is grounded.
  7. 如权利要求1至6中任一项所述的防漏电电路，其中，所述电压检测电路包括至少两个分压电阻，所述分压电阻依次串联在所述第一支路电路的所述第一电源输入端和第一接触端之间，所述切换电路根据所述分压电阻上的电压使得所述第一支路电路或者所述第二支路电路的所述第二电源输入端连接至所述两脚充电器的充电电路的输出接地。A leakage preventing circuit according to any one of claims 1 to 6, wherein said voltage detecting circuit comprises at least two voltage dividing resistors, said voltage dividing resistors being sequentially connected in series in said first branch circuit Between the first power input end and the first contact end, the switching circuit causes the first branch circuit or the second power input end of the second branch circuit according to a voltage on the voltage dividing resistor The output of the charging circuit connected to the two-legged charger is grounded.
  8. 如权利要求7所述的防漏电电路，其中，所述至少两个分压电阻串联或并联连接。The leakage preventing circuit according to claim 7, wherein said at least two voltage dividing resistors are connected in series or in parallel.
  9. 一种两脚充电器，包括防漏电电路、充电电路和两个引脚，所述防漏电电路设置在所述两个引脚与所述充电电路之间，所述防漏电电路包括第一支路电路和第二支路电路，A two-legged charger includes a leakage preventing circuit, a charging circuit and two pins, the leakage preventing circuit is disposed between the two pins and the charging circuit, and the leakage preventing circuit includes a first branch Circuit circuit and second branch circuit,
    所述第一支路电路包括依次串联连接的第一电源输入端、电压检测电路、以及第一接触端，所述第一电源输入端配置为与两脚充电器的第一引脚连接，所述第一接触端配置为与所述两脚充电器的外壳的金属部分连接，所述电压检测电路配置为检测所述第一支路电路上的电压，The first branch circuit includes a first power input terminal, a voltage detecting circuit, and a first contact end connected in series, and the first power input terminal is configured to be connected to the first pin of the two-leg charger. The first contact end is configured to be connected to a metal portion of the outer casing of the two-legged charger, and the voltage detecting circuit is configured to detect a voltage on the first branch circuit,
    所述第二支路电路包括第二电源输入端和切换电路，所述第二电源输入端配置为与所述两脚充电器的第二引脚连接，所述切换电路配置为与所述两脚充电器的充电电路的输出接地连接，且所述切换电路配置为根据所述电压检测电路检测到的电压，使得所述第一支路电路或者所述第二支路电路的所述第二电源输入端连接至所述两脚充电器的充电电路的输出接地。The second branch circuit includes a second power input end and a switching circuit, the second power input end is configured to be connected to the second pin of the two-leg charger, and the switching circuit is configured to be opposite to the two An output of the charging circuit of the foot charger is grounded, and the switching circuit is configured to cause the first branch circuit or the second of the second branch circuit to be based on a voltage detected by the voltage detecting circuit The power input is connected to the output ground of the charging circuit of the two-legged charger.
  10. 如权利要求9所述的防漏电电路，其中，所述第二支路电路还包括第一保险丝，所述第一保险丝串联于所述切换电路与所述两脚充电器的充电电路的输出接地之间。A leakage preventing circuit according to claim 9, wherein said second branch circuit further comprises a first fuse, said first fuse being connected in series with said switching circuit and an output of said charging circuit of said two-legged charger between.
  11. 如权利要求9所述的两脚充电器，其中，所述充电电路包括安全电容器和第二保险丝，所述安全电容器和所述第二保险丝依次串联连接至所述充电电路的输出接地。The two-legged charger of claim 9, wherein the charging circuit comprises a safety capacitor and a second fuse, the safety capacitor and the second fuse being connected in series to an output ground of the charging circuit.
  12. 一种防漏电充电方法，包括：A leakage prevention charging method includes:
    在两脚充电器的第一引脚和第二引脚与充电电路之间设置防漏电电路；Providing a leakage preventing circuit between the first pin and the second pin of the two-pin charger and the charging circuit;
    在使用所述两脚充电器对可充电电器设备进行充电的状态下，检测所述防漏电电路的第一支路电路上的电压；以及Detecting a voltage on the first branch circuit of the leakage preventing circuit in a state in which the two-leg charger is used to charge the rechargeable electrical device;
    根据检测到的电压，控制所述两脚充电器的第一引脚或第二引脚连接至所述两脚充电器的充电电路的输出接地。The first pin or the second pin of the two-legged charger is controlled to be connected to the output ground of the charging circuit of the two-legged charger according to the detected voltage.
  13. 如权利要求12所述的防漏电充电方法，其中：A leakage preventing charging method according to claim 12, wherein:
    当检测到的电压实质上不为零，则将所述两脚充电器的第二引脚连接至所述两脚充电器的充电电路的输出接地；When the detected voltage is substantially not zero, connecting the second pin of the two-leg charger to the output ground of the charging circuit of the two-leg charger;
    当检测到的电压实质上为零，则将所述两脚充电器的第一引脚连接至所述两脚充电器的充电电路的输出接地。When the detected voltage is substantially zero, the first pin of the two-legged charger is connected to the output ground of the charging circuit of the two-legged charger.
  14. 一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行来实现如权利要求12或13所述的防漏电充电方法。A computer readable storage medium having computer executable instructions stored thereon, the computer executable instructions being executed to implement the leakage prevention charging method of claim 12 or 13.
PCT/CN2018/102521 2017-08-28 2018-08-27 Electric leakage resistance circuit, two-pin charger, electric leakage resistance charging method, and computer readable storage medium WO2019042254A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710749533.3A CN109428354A (en) 2017-08-28 2017-08-28 A kind of Anti-leakage circuit, charger and anticreep charging method
CN201710749533.3 2017-08-28

Publications (1)

Publication Number Publication Date
WO2019042254A1 true WO2019042254A1 (en) 2019-03-07

Family

ID=65502488

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/102521 WO2019042254A1 (en) 2017-08-28 2018-08-27 Electric leakage resistance circuit, two-pin charger, electric leakage resistance charging method, and computer readable storage medium

Country Status (2)

Country Link
CN (1) CN109428354A (en)
WO (1) WO2019042254A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090085576A1 (en) * 2007-10-01 2009-04-02 Echostar Technologies Corporation Apparatus, system and methods for ground current detection
CN202585956U (en) * 2012-04-24 2012-12-05 上海音特电子有限公司 Socket protection module
CN103166172A (en) * 2011-12-17 2013-06-19 富泰华工业（深圳）有限公司 Electricity leakage protection circuit, socket with electricity leakage protection circuit and electronic device
CN206117195U (en) * 2016-08-24 2017-04-19 东莞启益电器机械有限公司 Anticreep charger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090085576A1 (en) * 2007-10-01 2009-04-02 Echostar Technologies Corporation Apparatus, system and methods for ground current detection
CN103166172A (en) * 2011-12-17 2013-06-19 富泰华工业（深圳）有限公司 Electricity leakage protection circuit, socket with electricity leakage protection circuit and electronic device
CN202585956U (en) * 2012-04-24 2012-12-05 上海音特电子有限公司 Socket protection module
CN206117195U (en) * 2016-08-24 2017-04-19 东莞启益电器机械有限公司 Anticreep charger

Also Published As

Publication number Publication date
CN109428354A (en) 2019-03-05

Similar Documents

Publication Publication Date Title
TWI643074B (en) Power delivery control module
JP6198258B2 (en) Power supply terminal, and charging control method and apparatus
US8683090B2 (en) Methods, systems and apparatus for determining whether an accessory includes particular circuitry
CN104331141B (en) Overcurrent protection circuit and server thereof
JP5896567B2 (en) System and method for providing power in response to a connection event
WO2016074390A1 (en) Power adapter and terminal
CN104578277B (en) For the method for charging for electronic equipment and electronic equipment
CN104467109A (en) Method for supplying power to electronic equipment and electronic equipment
US20130155563A1 (en) Current leakage protection circuit, power socket and electronic device using same
CN105634143B (en) Wireless power and power receiving device and its operating method
CN106451621B (en) A kind of charging system, protection of quick charge device and method
US10554058B2 (en) Systems and methods for monitoring an operating status of a connector
CN104167790B (en) The charge control system and its charge control method of charger, mobile terminal
CN205427505U (en) Zero power consumption standby circuit and electronic product
WO2019042254A1 (en) Electric leakage resistance circuit, two-pin charger, electric leakage resistance charging method, and computer readable storage medium
CN207320811U (en) Alternating current ground wire isolation circuit, earth leakage protective device and electric equipment products
TW201933713A (en) Power saving device capable of automatically sensing standby current
CN201360079Y (en) Central control linkage power socket
CN106654408B (en) User equipment, battery, load end and method of supplying power to
CN203839621U (en) Non-contact type safety socket in direct current power distribution network
CN205811848U (en) The Switching Power Supply IC circuit of superposition frequency jitter
CN204012650U (en) Single phase poaer supply prevention of electric shock device
CN106451647A (en) Protective circuit
US20130127401A1 (en) Environmentally friendly plug-in adapter
CN204205688U (en) A kind of charger with switch

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18852325

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 10/09/2020)

122 Ep: pct application non-entry in european phase

Ref document number: 18852325

Country of ref document: EP

Kind code of ref document: A1